/* ============================================================
   羡曦吾语AI少年学院 · Xianxi Wuyu AI Youth Academy
   设计系统 v42「晨雾湖蓝 Aurora」：雾白浅底 × 湖青科技蓝
   清新 · 克制 · 细描边玻璃质感 · 单色线性图标（icons.js）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  /* 深色舞台（仅播放器/代码窗/沉浸小面积使用） */
  --night-1:#08182B;
  --night-2:#0D2438;
  --night-3:#143552;
  /* 墨色文字层级 */
  --ink:#0D2438;
  --ink-soft:#415B72;
  --ink-mute:#7E95AB;
  /* 纸面：雾白 → 冰蓝 */
  --paper:#FFFFFF;
  --paper-2:#F3F9FE;
  --paper-3:#E6F2FB;
  --line:#E0EDF7;
  --line-soft:#EDF4FB;
  /* 品牌主色：青海湖青 → 晴空蓝；薄荷点缀 */
  --lake:#06B6D4;
  --lake-deep:#0E7490;
  --lake-ink:#0A5568;
  --sky:#0EA5E9;
  --mint:#14B8A6;
  --grass:#16A34A;
  --gold:#F59E0B;
  --orange:#FB923C;
  --violet:#8B5CF6;
  --pink:#EC4899;
  --red:#EF4444;
  /* 科技渐变：统一青蓝双段，不再用紫粉炫彩 */
  --grad-main:linear-gradient(135deg,#06B6D4 0%,#0EA5E9 60%,#38BDF8 100%);
  --grad-deep:linear-gradient(135deg,#0E7490 0%,#0369A1 100%);
  --grad-warm:linear-gradient(135deg,#FBBF24,#FB923C);
  --grad-cool:linear-gradient(135deg,#14B8A6,#06B6D4);
  --grad-mist:linear-gradient(180deg,#F7FCFF 0%,#E9F5FE 100%);
  --grad-night:linear-gradient(160deg,#08182B 0%,#0D2438 60%,#11314C 100%);
  /* 轻阴影：冷青色调、克制 */
  --shadow-s:0 1px 2px rgba(13,52,82,.05),0 4px 14px rgba(13,52,82,.06);
  --shadow-m:0 2px 6px rgba(13,52,82,.05),0 14px 34px rgba(13,52,82,.10);
  --shadow-l:0 8px 18px rgba(13,52,82,.08),0 30px 70px rgba(13,52,82,.16);
  --shadow-glow:0 0 0 1px rgba(6,182,212,.18),0 10px 32px rgba(6,182,212,.16);
  --r-s:10px;--r-m:14px;--r-l:20px;--r-xl:28px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono","Cascadia Code",Consolas,"Courier New",monospace;
  --max:1180px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);color:var(--ink);
  background:
    radial-gradient(1100px 520px at 88% -8%,rgba(6,182,212,.08),transparent 60%),
    radial-gradient(900px 480px at -6% 4%,rgba(56,189,248,.08),transparent 55%),
    var(--paper-2);
  background-attachment:fixed;
  line-height:1.75;font-size:16px;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
input,textarea,select{font-family:inherit;font-size:inherit}
::selection{background:rgba(6,182,212,.22)}

/* 自绘线性图标通用尺寸 */
.ui-ic{width:1em;height:1em;flex:none;display:inline-block;vertical-align:-.14em}

/* 滚动条：细、浅色、青蓝滑块 */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:linear-gradient(#67E8F9,#38BDF8);border-radius:8px;border:2px solid var(--paper-2);background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:linear-gradient(#22D3EE,#0EA5E9);background-clip:padding-box;border:2px solid var(--paper-2)}

/* ---------- 通用容器 ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.section{padding:78px 0}
.section-tight{padding:88px 0 52px}
/* 专区页上方已有 zone-hero（自带底部留白），正文不再重复顶部让位 */
.section-tight:has(>#zoneRoot),.section-tight:has(>.zone-layout){padding-top:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;
  letter-spacing:.16em;color:var(--lake-deep);
  background:linear-gradient(135deg,rgba(6,182,212,.1),rgba(14,165,233,.07));
  border:1px solid rgba(6,182,212,.22);padding:7px 15px;border-radius:999px;margin-bottom:16px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9);
}
.sec-title{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.01em;line-height:1.3}
.sec-sub{color:var(--ink-soft);font-size:16px;margin-top:12px;max-width:680px}
.center{text-align:center}.center .sec-sub{margin-left:auto;margin-right:auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;
  padding:12.5px 26px;border-radius:999px;transition:.22s cubic-bezier(.3,.7,.3,1);white-space:nowrap;
}
.btn .ui-ic{width:18px;height:18px}
.btn-primary{
  background:var(--grad-main);color:#fff;
  box-shadow:0 6px 18px rgba(14,165,233,.28),inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(14,165,233,.38),inset 0 1px 0 rgba(255,255,255,.35)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:rgba(255,255,255,.72);color:var(--lake-ink);border:1px solid rgba(14,116,144,.28);
  backdrop-filter:blur(8px);box-shadow:var(--shadow-s);
}
.btn-ghost:hover{background:#fff;border-color:rgba(6,182,212,.5);transform:translateY(-2px);box-shadow:var(--shadow-m)}
.btn-light{background:#fff;color:var(--lake-deep);box-shadow:var(--shadow-s);border:1px solid var(--line)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow-m)}
.btn-outline{border:1.5px solid rgba(6,182,212,.55);color:var(--lake-deep);background:rgba(255,255,255,.6)}
.btn-outline:hover{background:rgba(6,182,212,.08);transform:translateY(-2px)}
.btn-sm{padding:8px 18px;font-size:13.5px}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- 顶部导航：浅色玻璃 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  transition:.3s ease;padding:10px 0;
  background:rgba(247,251,254,.72);backdrop-filter:blur(18px) saturate(1.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
  border-bottom:1px solid rgba(224,237,247,.8);
}
.nav.scrolled{
  background:rgba(247,251,254,.92);
  box-shadow:0 6px 24px rgba(13,52,82,.08);padding:8px 0;
}
.nav-inner{display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;color:var(--ink);transition:.3s;flex:none;white-space:nowrap}
.brand-logo{
  width:42px;height:42px;border-radius:13px;background:var(--grad-main);
  display:grid;place-items:center;font-size:22px;
  box-shadow:0 6px 16px rgba(6,182,212,.32),inset 0 1px 0 rgba(255,255,255,.4);
  position:relative;flex:none;
}
.brand-logo::after{
  content:"";position:absolute;inset:0;border-radius:13px;
  border:1px solid rgba(255,255,255,.45);pointer-events:none;
}
.brand small{display:block;font-size:10px;font-weight:700;letter-spacing:.14em;color:var(--ink-mute)}
.nav-links{display:flex;gap:1px;margin-left:auto}
.nav-links a{
  padding:8px 11px;border-radius:999px;font-size:13.5px;font-weight:600;white-space:nowrap;
  color:var(--ink-soft);transition:.22s;display:inline-flex;align-items:center;gap:5px;
}
.nav-links a .ui-ic{width:15px;height:15px;color:var(--lake)}
.nav-links a:hover,.nav-links a.active{background:rgba(6,182,212,.11);color:var(--lake-deep)}
.nav-toggle{display:none;flex-direction:column;gap:5px;margin-left:auto;padding:8px}
.nav-toggle span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.3s}
.progress-bar{
  position:fixed;top:0;left:0;height:3px;background:var(--grad-main);
  z-index:1001;width:0;transition:width .15s;
}

/* ---------- HERO（首页）：浅色极光科技 ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  color:var(--ink);padding:128px 0 84px;overflow:hidden;
  background:
    radial-gradient(760px 420px at 82% 12%,rgba(6,182,212,.14),transparent 62%),
    radial-gradient(620px 420px at 8% 22%,rgba(56,189,248,.12),transparent 60%),
    radial-gradient(520px 380px at 60% 100%,rgba(20,184,166,.08),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#EEF7FE 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(14,116,144,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,116,144,.06) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(75% 70% at 50% 30%,#000 30%,transparent 78%);
  mask-image:radial-gradient(75% 70% at 50% 30%,#000 30%,transparent 78%);
}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%}
.hero-mountain{
  position:absolute;bottom:-2px;left:0;right:0;width:100%;pointer-events:none;opacity:.9;
}
.hero-inner{position:relative;z-index:3;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;width:100%}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(255,255,255,.82);border:1px solid rgba(6,182,212,.24);
  padding:8px 18px;border-radius:999px;
  font-size:13.5px;font-weight:700;color:var(--lake-deep);margin-bottom:24px;
  backdrop-filter:blur(10px);box-shadow:var(--shadow-s);
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(20,184,166,.16);animation:pulse 1.8s infinite}
.hero h1{font-size:clamp(34px,5.2vw,58px);font-weight:900;line-height:1.18;letter-spacing:-.01em;color:var(--night-1)}
.hero h1 .grad{
  background:linear-gradient(100deg,#0891B2,#0EA5E9 55%,#38BDF8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p.lead{font-size:clamp(15.5px,1.6vw,18.5px);color:var(--ink-soft);margin:22px 0 32px;max-width:575px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-actions .btn-primary .ui-ic{width:17px;height:17px}
.hero-stats{display:flex;gap:38px;margin-top:46px;flex-wrap:wrap}
.hero-stat b{font-size:32px;font-weight:900;display:block;font-family:var(--mono);letter-spacing:-.02em;line-height:1.15;
  background:linear-gradient(100deg,#0E7490,#0EA5E9);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stat span{font-size:13px;color:var(--ink-mute);letter-spacing:.05em;font-weight:600}

/* Hero 右侧轨道球（浅色玻璃轨道） */
.hero-visual{position:relative;height:430px}
.orbit{position:absolute;inset:0;margin:auto;border:1.5px solid rgba(14,116,144,.16);border-radius:50%;animation:spin 36s linear infinite}
.orbit.o2{inset:14%;animation-duration:26s;animation-direction:reverse;border-color:rgba(14,165,233,.2)}
.orbit.o3{inset:28%;animation-duration:18s;border-color:rgba(20,184,166,.26)}
.orbit i{
  position:absolute;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  font-size:21px;background:rgba(255,255,255,.85);border:1px solid rgba(255,255,255,.9);
  backdrop-filter:blur(6px);box-shadow:0 10px 28px rgba(13,52,82,.14);
}
.orbit i:nth-child(1){top:-23px;left:50%;margin-left:-23px}
.orbit.o2 i{top:auto;bottom:-21px;left:50%;margin-left:-21px;width:42px;height:42px}
.orbit.o3 i{top:50%;left:-20px;margin-top:-20px;width:40px;height:40px}
.ai-core{
  position:absolute;inset:0;margin:auto;width:158px;height:158px;border-radius:32px;
  background:linear-gradient(145deg,#A5F3FC 0%,#22D3EE 42%,#0EA5E9 100%);
  display:grid;place-items:center;font-size:64px;
  box-shadow:0 24px 60px rgba(6,182,212,.34),inset 0 1.5px 0 rgba(255,255,255,.55);
  animation:floaty 5.5s ease-in-out infinite;
}
.ai-core::before{content:"";position:absolute;inset:-14px;border-radius:40px;border:1.5px solid rgba(6,182,212,.3);animation:ping 2.8s ease-out infinite}
.ai-core::after{content:"";position:absolute;inset:-14px;border-radius:40px;border:1.5px solid rgba(6,182,212,.3);animation:ping 2.8s ease-out 1.4s infinite}
.ai-core svg{width:82px;height:82px;color:#fff;filter:drop-shadow(0 2px 6px rgba(3,105,161,.35))}

/* 波浪下沿 */
.hero-wave{position:absolute;bottom:-1px;left:0;width:100%;z-index:2;line-height:0}

/* ---------- 跑马灯：白底青条 ---------- */
.marquee{
  background:#fff;color:var(--ink-soft);padding:14px 0;overflow:hidden;white-space:nowrap;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.marquee-track{display:inline-flex;gap:54px;animation:marquee 34s linear infinite;font-size:14.5px;font-weight:600;letter-spacing:.04em}
.marquee-track span{display:inline-flex;align-items:center;gap:10px}
.marquee-track b{color:var(--lake-deep)}

/* ---------- 专区卡片网格 ---------- */
.zones-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.zone-card{
  position:relative;border-radius:var(--r-l);overflow:hidden;background:#fff;
  border:1px solid var(--line);
  box-shadow:var(--shadow-s);transition:.3s cubic-bezier(.3,.7,.3,1);
  display:flex;flex-direction:column;min-height:392px;
}
.zone-card:hover{transform:translateY(-7px);box-shadow:var(--shadow-l);border-color:rgba(6,182,212,.35)}
.zone-cover{height:168px;position:relative;overflow:hidden;display:grid;place-items:center}
.zone-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:.5s}
.zone-card:hover .zone-cover img{transform:scale(1.06)}
.zone-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,24,43,.02) 20%,rgba(8,24,43,.28))}
.zone-emoji{
  position:relative;z-index:2;width:70px;height:70px;border-radius:20px;font-size:33px;
  display:grid;place-items:center;background:rgba(255,255,255,.9);
  border:1px solid rgba(255,255,255,.95);backdrop-filter:blur(8px);
  box-shadow:0 10px 26px rgba(13,52,82,.22);transition:.35s;
}
.zone-card:hover .zone-emoji{transform:translateY(-3px) scale(1.08);box-shadow:0 16px 34px rgba(6,182,212,.3)}
.zone-no{
  position:absolute;top:14px;left:16px;z-index:2;font-size:11.5px;font-weight:800;
  letter-spacing:.12em;color:#fff;background:rgba(8,24,43,.5);padding:4px 11px;border-radius:999px;backdrop-filter:blur(4px)
}
.zone-level{
  position:absolute;top:14px;right:16px;z-index:2;font-size:12px;font-weight:700;
  color:var(--lake-ink);background:rgba(255,255,255,.88);padding:4px 11px;border-radius:999px;
  backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.9);box-shadow:0 2px 10px rgba(13,52,82,.12)
}
.zone-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.zone-body h3{font-size:19px;font-weight:800;margin-bottom:8px}
.zone-body p{font-size:14px;color:var(--ink-soft);flex:1}
.zone-meta{display:flex;gap:14px;margin-top:16px;font-size:12.5px;color:var(--ink-mute)}
.zone-meta span{display:inline-flex;align-items:center;gap:5px}
.zone-meta .ui-ic{width:13.5px;height:13.5px;color:var(--lake)}
.zone-body h3 .ui-ic{width:17px;height:17px;vertical-align:-2px}
.zone-level .ui-ic,.zone-level-soon .ui-ic,.zone-level-offline .ui-ic{width:13px;height:13px}
.zone-vip-tag .ui-ic,.zone-vip-lock .ui-ic{width:13px;height:13px}
.zone-prog em .ui-ic{width:14px;height:14px;vertical-align:-2px}
.zone-go{
  margin-top:16px;display:inline-flex;align-items:center;gap:7px;font-weight:700;font-size:14px;
  color:var(--lake-deep);transition:.25s;
}
.zone-go .ui-ic{width:15px;height:15px}
.zone-card:hover .zone-go{gap:12px}

/* ---------- 学习路径：浅色玻璃四阶 ---------- */
.path-section{
  color:var(--ink);position:relative;overflow:hidden;
  background:
    radial-gradient(680px 360px at 12% 0%,rgba(6,182,212,.1),transparent 60%),
    radial-gradient(600px 360px at 92% 100%,rgba(56,189,248,.1),transparent 60%),
    #fff;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.path-section::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(6,182,212,.1),transparent 65%);top:-160px;right:-120px;
}
.path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:46px;position:relative;z-index:2}
.path-step{
  background:rgba(255,255,255,.78);border:1px solid var(--line);
  border-radius:var(--r-l);padding:28px 22px;backdrop-filter:blur(8px);transition:.3s;position:relative;
  box-shadow:var(--shadow-s);
}
.path-step:hover{background:#fff;transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:rgba(6,182,212,.4)}
.path-step .stage{
  font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--lake-deep);
  background:rgba(6,182,212,.1);padding:4px 12px;border-radius:999px;display:inline-block;
}
.path-section h4{font-size:20px;margin:16px 0 6px;font-weight:800}
.path-section .sec-sub{color:var(--ink-soft)}
.path-step p{font-size:13.5px;color:var(--ink-soft)}
.path-step .pic{
  font-size:34px;display:grid;place-items:center;width:62px;height:62px;margin-bottom:14px;
  border-radius:18px;background:linear-gradient(135deg,#ECFEFF,#E0F2FE);border:1px solid #CFF3FA;
}
.path-step ul{margin-top:14px;display:flex;flex-direction:column;gap:7px}
.path-step li{font-size:13px;color:var(--ink-soft);padding-left:20px;position:relative}
.path-step li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:2px;background:var(--lake);transform:rotate(45deg)}
.path-connector{text-align:center;color:var(--lake);font-size:20px;margin-top:26px;letter-spacing:1em;opacity:.65}

/* ---------- 特色条 ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:44px}
.feat{
  background:#fff;border-radius:var(--r-m);padding:28px 22px;box-shadow:var(--shadow-s);
  border:1px solid var(--line);transition:.3s;
}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow-m);border-color:rgba(6,182,212,.35)}
.feat .ic{
  width:54px;height:54px;border-radius:16px;display:grid;place-items:center;font-size:26px;margin-bottom:16px;
}
.feat h4{font-size:16.5px;font-weight:800;margin-bottom:7px}
.feat p{font-size:13.5px;color:var(--ink-soft)}
.ic.c1{background:linear-gradient(135deg,#CFFAF3,#E6FAFE);color:#0F766E}
.ic.c2{background:linear-gradient(135deg,#DBEAFE,#EDE9FE);color:#1D4ED8}
.ic.c3{background:linear-gradient(135deg,#FEF3C7,#FFEDD5);color:#B45309}
.ic.c4{background:linear-gradient(135deg,#DCFCE7,#D1FAE5);color:#15803D}

/* ---------- 首页演示橱窗 ---------- */
.showcase{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-top:48px}
.showcase-screen{
  background:var(--night-1);border-radius:var(--r-l);padding:18px;box-shadow:var(--shadow-l);
  border:1px solid rgba(255,255,255,.08);position:relative;
}
.screen-dots{display:flex;gap:7px;margin-bottom:14px;padding-left:6px}
.screen-dots i{width:11px;height:11px;border-radius:50%;display:block}
.screen-dots i:nth-child(1){background:#FF5F57}.screen-dots i:nth-child(2){background:#FEBC2E}.screen-dots i:nth-child(3){background:#28C840}
.code-lines{font-family:var(--mono);font-size:13.5px;line-height:2;color:rgba(226,238,248,.85);white-space:pre-wrap}
.code-lines .kw{color:#C084FC}.code-lines .str{color:#86EFAC}.code-lines .fn{color:#7DD3FC}.code-lines .cm{color:#5B7290}
.code-lines .cursor{display:inline-block;width:8px;height:17px;background:#67E8F9;vertical-align:-2px;animation:blink 1s steps(1) infinite}
.showcase h3{font-size:26px;font-weight:800;margin-bottom:14px}
.showcase .num{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--lake-deep);
  letter-spacing:.16em;display:block;margin-bottom:10px;
}
.showcase p{color:var(--ink-soft);margin-bottom:16px}
.check-list li{padding-left:30px;position:relative;margin-bottom:11px;font-weight:600;font-size:15px}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:1px;width:21px;height:21px;border-radius:50%;
  background:var(--grad-cool);color:#fff;font-size:12px;display:grid;place-items:center;font-weight:900;
}
/* 关于区线性图标底盘 */
.about-ic{
  width:46px;height:46px;flex:none;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,#ECFEFF,#E0F2FE);border:1px solid #CFF3FA;box-shadow:var(--shadow-s);
}
.about-ic .ui-ic{width:23px;height:23px}

/* ---------- 数据横幅：深青渐变舞台 ---------- */
.cta-band{
  background:
    radial-gradient(520px 260px at 88% 0%,rgba(103,232,249,.22),transparent 60%),
    linear-gradient(120deg,#0E7490 0%,#0369A1 60%,#075985 100%);
  border-radius:var(--r-xl);padding:56px 48px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  position:relative;overflow:hidden;
  box-shadow:0 24px 60px rgba(3,105,161,.28),inset 0 1px 0 rgba(255,255,255,.22);
}
.cta-band::before{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 85% 20%,rgba(255,255,255,.16),transparent 40%),
  radial-gradient(circle at 10% 90%,rgba(165,243,252,.12),transparent 45%);
  pointer-events:none}
.cta-band h3{font-size:clamp(23px,3vw,31px);font-weight:900;position:relative}
.cta-band p{opacity:.92;margin-top:8px;position:relative}
.cta-band .btn{position:relative}

/* ---------- 页脚：浅色冰蓝 ---------- */
.footer{
  background:linear-gradient(180deg,#EAF4FC 0%,#E2EFFA 100%);
  color:var(--ink-soft);padding:60px 0 28px;position:relative;
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.footer h5{color:var(--ink);font-size:14.5px;margin-bottom:18px;font-weight:800;letter-spacing:.02em}
.footer a{display:inline-flex;align-items:center;gap:7px;padding:4px 0;font-size:14px;color:var(--ink-soft);transition:.2s}
.footer a .ui-ic{width:15px;height:15px;color:var(--lake)}
.footer a:hover{color:var(--lake-deep)}
.footer .brand{margin-bottom:16px}
.footer p.f-desc{font-size:13.5px;line-height:1.9;max-width:300px}
.footer-bottom{
  border-top:1px solid var(--line);margin-top:42px;padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#5F768B
}

/* ============================================================
   专区页面
   ============================================================ */

/* 专区头部：浅色极光封面 */
.zone-hero{
  position:relative;padding:132px 0 64px;color:var(--ink);overflow:hidden;
  background:
    radial-gradient(720px 360px at 85% 0%,rgba(6,182,212,.13),transparent 62%),
    radial-gradient(560px 340px at 0% 30%,rgba(56,189,248,.1),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#EDF6FE 100%);
  border-bottom:1px solid var(--line);
}
.zone-hero .bgimg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.07}
.zone-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(rgba(14,116,144,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,116,144,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(80% 90% at 80% 0,#000 20%,transparent 75%);
  mask-image:radial-gradient(80% 90% at 80% 0,#000 20%,transparent 75%);
}
.zone-hero .wrap{position:relative;z-index:2}
.crumb{font-size:13.5px;color:var(--ink-mute);margin-bottom:20px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-weight:600}
.crumb a:hover{color:var(--lake-deep)}
.crumb .ui-ic{width:14px;height:14px}
.zone-hero h1{font-size:clamp(28px,4vw,44px);font-weight:900;display:flex;align-items:center;gap:16px;flex-wrap:wrap;color:var(--night-1)}
.zone-hero .lead{font-size:17px;color:var(--ink-soft);margin-top:14px;max-width:720px}
.zone-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.zone-tags span{
  font-size:13px;font-weight:700;background:rgba(255,255,255,.85);border:1px solid var(--line);
  padding:6px 15px;border-radius:999px;display:inline-flex;gap:7px;align-items:center;color:var(--ink-soft);
  box-shadow:var(--shadow-s);
}
.zone-tags span .ui-ic{width:14px;height:14px;color:var(--lake)}
.zone-teacher-link{
  font-size:13px;font-weight:800;color:#0A5568 !important;
  background:linear-gradient(135deg,#CFFAF3,#BAEAF3);border:1px solid #8EE3EC;
  padding:6px 15px;border-radius:999px;display:inline-flex;gap:6px;align-items:center;transition:.15s;
}
.zone-teacher-link .ui-ic{width:14px;height:14px}
.zone-teacher-link:hover{background:linear-gradient(135deg,#A5F3FC,#8EE3EC);transform:translateY(-1px)}

/* 学习目标卡 */
.goals{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:-36px auto 0;position:relative;z-index:5}
.goal{
  background:#fff;border-radius:var(--r-m);padding:22px 18px;box-shadow:var(--shadow-m);
  border:1px solid var(--line);border-top:3px solid var(--lake);transition:.3s;
}
.goal:nth-child(2){border-top-color:var(--sky)}.goal:nth-child(3){border-top-color:var(--gold)}.goal:nth-child(4){border-top-color:var(--mint)}
.goal:hover{transform:translateY(-5px);box-shadow:var(--shadow-l)}
.goal .gi{
  font-size:24px;margin-bottom:10px;display:grid;place-items:center;width:46px;height:46px;border-radius:13px;
  background:linear-gradient(135deg,#ECFEFF,#E0F2FE);border:1px solid #CFF3FA;
}
.goal b{font-size:15px;display:block;margin-bottom:4px}
.goal span{font-size:13px;color:var(--ink-soft)}

/* 内容布局：目录 + 正文 */
.zone-layout{display:grid;grid-template-columns:230px 1fr;gap:40px;align-items:start}
.toc{position:sticky;top:92px}
.toc h5{font-size:13px;letter-spacing:.12em;color:var(--ink-mute);margin-bottom:12px;font-weight:800}
.toc a{
  display:block;padding:9px 14px;border-radius:10px;font-size:14px;font-weight:600;
  color:var(--ink-soft);border-left:3px solid transparent;transition:.2s;margin-bottom:2px;
}
.toc a:hover{background:var(--paper-3);color:var(--lake-deep)}
.toc a.active{background:rgba(6,182,212,.1);color:var(--lake-deep);border-left-color:var(--lake)}
.toc-progress{margin-top:18px;background:var(--paper-3);border-radius:999px;height:8px;overflow:hidden}
.toc-progress i{display:block;height:100%;background:var(--grad-main);width:0;transition:width .4s}
.toc-progress-wrap{font-size:12.5px;color:var(--ink-mute);margin-top:8px;text-align:center}

/* 章节 */
.chapter{margin-bottom:58px;scroll-margin-top:90px}
.chapter-head{display:flex;align-items:center;gap:16px;margin-bottom:24px}
.chapter-num{
  width:52px;height:52px;border-radius:16px;flex:none;display:grid;place-items:center;
  font-family:var(--mono);font-weight:800;font-size:18px;color:var(--lake-deep);
  background:linear-gradient(135deg,#ECFEFF,#E0F2FE);border:1px solid #B2EAF3;
  box-shadow:var(--shadow-s);
}
.chapter-head h2{font-size:clamp(22px,2.6vw,29px);font-weight:800;line-height:1.3}
.prose{font-size:16px;color:#33485C}
.prose p{margin:14px 0}
.prose strong{color:var(--ink);background:linear-gradient(transparent 63%,rgba(6,182,212,.22) 63%);padding:0 2px;font-weight:800}
.prose h3{font-size:19px;font-weight:800;margin:28px 0 10px;color:var(--ink)}
.prose ul{margin:14px 0;display:flex;flex-direction:column;gap:9px}
.prose ul li{padding-left:26px;position:relative}
.prose ul li::before{content:"▸";position:absolute;left:4px;color:var(--lake);font-weight:900}

/* 信息框 */
.note{border-radius:var(--r-m);padding:20px 22px;margin:22px 0;display:flex;gap:14px;align-items:flex-start;font-size:14.5px}
.note .n-ic{font-size:22px;flex:none;line-height:1.4}
.note b{display:block;margin-bottom:3px;font-size:15px}
.note.tip{background:rgba(6,182,212,.09);border:1px solid rgba(6,182,212,.25);color:#155B6B}
.note.warn{background:rgba(245,158,11,.1);border:1px solid rgba(245,158,11,.3);color:#8A5A10}
.note.fun{background:rgba(139,92,246,.09);border:1px solid rgba(139,92,246,.25);color:#5B3A9E}
.note.danger{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.25);color:#9F2B2B}

/* 双栏图文 */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;margin:24px 0}
.duo.rev>*:first-child{order:2}
.pane{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:24px;box-shadow:var(--shadow-s)}
.pane-dark{background:var(--night-1);border-color:rgba(255,255,255,.08);color:rgba(226,238,248,.85)}

/* 卡片网格(内容用) */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}
.mini-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:22px;transition:.3s}
.mini-card:hover{box-shadow:var(--shadow-m);transform:translateY(-4px);border-color:transparent}
.mini-card .mc-ic{font-size:30px;margin-bottom:12px;display:block}
.mini-card h4{font-size:16px;font-weight:800;margin-bottom:7px}
.mini-card p{font-size:13.5px;color:var(--ink-soft)}

/* 表格 */
.tbl-wrap{overflow-x:auto;border-radius:var(--r-m);box-shadow:var(--shadow-s);margin:22px 0;border:1px solid var(--line)}
table.tbl{width:100%;border-collapse:collapse;background:#fff;font-size:14.5px;min-width:520px}
.tbl th{background:linear-gradient(135deg,#E7F7FC,#DFF0FA);color:var(--lake-ink);text-align:left;padding:14px 18px;font-weight:800;font-size:13.5px;white-space:nowrap;border-bottom:1px solid #C9E5F2}
.tbl td{padding:13px 18px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr:last-child td{border-bottom:none}
.tbl tr:hover td{background:var(--paper-2)}
.tbl .tag-yes{color:var(--grass);font-weight:800}.tbl .tag-no{color:var(--red);font-weight:800}

/* 代码块 */
.codeblock{background:var(--night-1);border-radius:var(--r-m);margin:22px 0;overflow:hidden;box-shadow:var(--shadow-m)}
.codeblock-bar{display:flex;align-items:center;gap:10px;padding:11px 16px;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.08)}
.codeblock-bar span{font-size:12.5px;color:rgba(226,238,248,.55);font-family:var(--mono)}
.codeblock pre{padding:18px 20px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.9;color:#DCEBF8}
.codeblock .tk-kw{color:#C084FC}.codeblock .tk-str{color:#86EFAC}.codeblock .tk-fn{color:#7DD3FC}
.codeblock .tk-cm{color:#5B7290;font-style:italic}.codeblock .tk-num{color:#FBBF24}.codeblock .tk-bool{color:#F472B6}

/* 步骤条 */
.steps{margin:24px 0;display:flex;flex-direction:column;gap:0}
.step-row{display:flex;gap:18px;position:relative;padding-bottom:26px}
.step-row:last-child{padding-bottom:0}
.step-row::before{content:"";position:absolute;left:21px;top:44px;bottom:0;width:2px;background:linear-gradient(var(--lake),rgba(6,182,212,.15))}
.step-row:last-child::before{display:none}
.step-dot{
  width:44px;height:44px;border-radius:50%;flex:none;background:#fff;border:2px solid var(--lake);
  display:grid;place-items:center;font-weight:900;color:var(--lake-deep);font-family:var(--mono);
  box-shadow:0 0 0 5px rgba(6,182,212,.12);z-index:2;
}
.step-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:18px 22px;flex:1;box-shadow:var(--shadow-s)}
.step-body h4{font-size:16px;font-weight:800;margin-bottom:5px}
.step-body p{font-size:14px;color:var(--ink-soft)}

/* ---------- 互动演示台 ---------- */
.demo{
  background:linear-gradient(180deg,#0C1C33,#07111F);border-radius:var(--r-l);
  padding:0;margin:28px 0;overflow:hidden;box-shadow:var(--shadow-l);border:1px solid rgba(255,255,255,.08)
}
.demo-bar{
  display:flex;align-items:center;gap:12px;padding:14px 22px;
  background:rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.08)
}
.live-dot{width:9px;height:9px;border-radius:50%;background:var(--grass);box-shadow:0 0 10px var(--grass);animation:pulse 1.6s infinite}
.demo-bar b{color:#fff;font-size:14.5px;font-weight:800}
.demo-bar span{color:rgba(226,238,248,.55);font-size:12.5px}
.demo-bar .demo-badge{margin-left:auto;font-size:11.5px;font-weight:800;letter-spacing:.1em;color:#67E8F9;background:rgba(103,232,249,.12);padding:4px 12px;border-radius:999px}
.demo-stage{padding:26px 24px;color:#E2EEF8;min-height:200px}
.demo-ctl{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}

/* 演示台内部响应式栅格（窄屏自动单列，见文件末尾移动端区块） */
.dg{display:grid}
.dg-geo{grid-template-columns:1.2fr 1fr;gap:22px;align-items:start}
.dg-train{grid-template-columns:230px 1fr;gap:24px}
.dg-radar{grid-template-columns:340px 1fr;gap:26px;align-items:center}
.dg-turtle{grid-template-columns:1fr 1.15fr;gap:18px}
.dg-cite{grid-template-columns:1.25fr 1fr;gap:20px;align-items:start}
.dg-snow{grid-template-columns:300px 1fr;gap:22px;align-items:start}

/* 通用demo按钮 */
.dbtn{
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);color:#fff;
  padding:9px 20px;border-radius:999px;font-size:13.5px;font-weight:700;transition:.2s;
}
.dbtn:hover{background:rgba(103,232,249,.2);border-color:#67E8F9}
.dbtn.primary{background:var(--grad-main);border-color:transparent}
.dbtn:disabled{opacity:.4;cursor:not-allowed}

/* 扩散生图演示 */
.diffusion-wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;align-items:center}
.diff-canvas-box{position:relative;border-radius:var(--r-m);overflow:hidden;background:#000;aspect-ratio:4/3}
.diff-canvas-box canvas{width:100%;height:100%;display:block}
.diff-step-label{position:absolute;left:12px;bottom:12px;background:rgba(0,0,0,.62);padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:700}
.diff-info b{color:#67E8F9;font-size:14px}
.diff-info p{font-size:13.5px;color:rgba(226,238,248,.7);margin-top:6px;min-height:60px}
.diff-slider{width:100%;accent-color:var(--lake);margin-top:10px}
.diff-time{margin-top:14px;font-size:12.5px;color:rgba(226,238,248,.55);font-family:var(--mono)}

/* 神经网络演示 */
.nn-wrap{display:grid;grid-template-columns:1fr 220px;gap:22px}
.nn-canvas{width:100%;height:auto;background:#060E1A;border-radius:var(--r-m)}
.nn-side{display:flex;flex-direction:column;gap:12px;font-size:13px}
.nn-stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:12px 15px}
.nn-stat b{display:block;font-size:22px;color:#67E8F9;font-family:var(--mono)}
.nn-stat span{color:rgba(226,238,248,.6);font-size:12px}

/* 聊天模拟器 */
.chat-demo{display:flex;flex-direction:column;height:440px}
.chat-log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:4px 6px 14px}
.msg{max-width:82%;padding:11px 16px;border-radius:16px;font-size:14px;line-height:1.7;animation:rise .35s ease}
.msg.bot{align-self:flex-start;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1);border-bottom-left-radius:5px}
.msg.user{align-self:flex-end;background:var(--grad-main);border-bottom-right-radius:5px;color:#fff}
.msg.typing i{display:inline-block;width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.6);margin:0 2px;animation:bouncedot 1.2s infinite}
.msg.typing i:nth-child(2){animation-delay:.2s}.msg.typing i:nth-child(3){animation-delay:.4s}
.chat-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.chip{
  font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:999px;
  background:rgba(103,232,249,.1);border:1px solid rgba(103,232,249,.3);color:#A5F3FC;transition:.2s;
}
.chip:hover{background:rgba(103,232,249,.22)}
.chat-input-row{display:flex;gap:10px}
.chat-input-row input{
  flex:1;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:999px;
  padding:11px 18px;color:#fff;outline:none;transition:.2s;
}
.chat-input-row input:focus{border-color:#67E8F9;box-shadow:0 0 0 3px rgba(103,232,249,.15)}

/* 提示词工坊 */
.pstudio{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pstudio .p-group{margin-bottom:16px}
.pstudio label{display:block;font-size:13px;font-weight:700;color:#A5F3FC;margin-bottom:8px}
.pstudio .opts{display:flex;flex-wrap:wrap;gap:8px}
.opt{
  font-size:12.5px;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.15);color:rgba(226,238,248,.8);transition:.2s;
}
.opt.sel{background:rgba(139,92,246,.35);border-color:#A78BFA;color:#fff}
.prompt-preview{
  background:rgba(0,0,0,.35);border:1px dashed rgba(103,232,249,.4);border-radius:var(--r-m);
  padding:18px;min-height:150px;font-size:14px;line-height:1.9;
}
.prompt-preview b{color:#67E8F9}
.p-score{display:flex;align-items:center;gap:16px;margin-top:16px}
.p-score .ring{--p:0;width:78px;height:78px;border-radius:50%;
  background:conic-gradient(#22C55E calc(var(--p)*1%),rgba(255,255,255,.1) 0);
  display:grid;place-items:center;flex:none;transition:background .5s}
.p-score .ring::before{content:attr(data-v);width:60px;height:60px;border-radius:50%;background:#0C1C33;display:grid;place-items:center;font-family:var(--mono);font-weight:800;font-size:17px}
.p-score .p-tip{font-size:13px;color:rgba(226,238,248,.7)}

/* 硬件配置器 */
.hw-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.hw-pick{display:flex;flex-direction:column;gap:12px}
.hw-opt{
  text-align:left;background:rgba(255,255,255,.05);border:1.5px solid rgba(255,255,255,.12);
  border-radius:var(--r-m);padding:15px 18px;color:#E2EEF8;transition:.2s;
}
.hw-opt.sel{border-color:#67E8F9;background:rgba(103,232,249,.1)}
.hw-opt b{font-size:14.5px;display:block}
.hw-opt span{font-size:12.5px;color:rgba(226,238,248,.55)}
.hw-result{background:rgba(0,0,0,.3);border-radius:var(--r-m);padding:22px;font-size:14px;line-height:2}
.hw-result .big{font-size:22px;font-weight:900;color:#67E8F9}
.hw-bar{height:9px;border-radius:99px;background:rgba(255,255,255,.1);overflow:hidden;margin:6px 0 14px}
.hw-bar i{display:block;height:100%;border-radius:99px;background:var(--grad-cool);transition:width .5s}

/* 时间轴 */
.tl{position:relative;margin:26px 0;padding-left:34px}
.tl::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--lake),var(--violet),var(--gold))}
.tl-item{position:relative;padding:0 0 26px 18px}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:5px;width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--lake);box-shadow:0 0 0 4px rgba(6,182,212,.15);
}
.tl-item:nth-child(even)::before{border-color:var(--violet);box-shadow:0 0 0 4px rgba(139,92,246,.15)}
.tl-year{font-family:var(--mono);font-weight:900;font-size:17px;color:var(--lake-deep)}
.tl-item h4{font-size:16px;font-weight:800;margin:3px 0}
.tl-item p{font-size:13.5px;color:var(--ink-soft)}

/* 判断题/真假辨别 */
.judge-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:8px}
.judge-card{
  background:rgba(255,255,255,.05);border:1.5px solid rgba(255,255,255,.13);border-radius:var(--r-m);
  padding:18px;cursor:pointer;transition:.25s;
}
.judge-card:hover{border-color:rgba(103,232,249,.5)}
.judge-card.right{border-color:var(--grass);background:rgba(34,197,94,.12)}
.judge-card.wrong{border-color:var(--red);background:rgba(239,68,68,.12)}
.judge-card h5{font-size:14.5px;margin-bottom:6px;color:#fff}
.judge-card p{font-size:12.5px;color:rgba(226,238,248,.6)}
.judge-verdict{margin-top:12px;font-size:13px;min-height:20px;font-weight:600}

/* 分类小游戏 */
.sort-game{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.sort-col{background:rgba(255,255,255,.04);border:1px dashed rgba(255,255,255,.18);border-radius:var(--r-m);padding:14px;min-height:230px}
.sort-col h5{text-align:center;font-size:13.5px;color:#A5F3FC;margin-bottom:10px}
.sort-pool{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:14px;min-height:42px}
.sort-item{
  font-size:13px;font-weight:700;background:rgba(139,92,246,.25);border:1px solid rgba(167,139,250,.5);
  padding:7px 13px;border-radius:999px;cursor:pointer;transition:.2s;color:#fff;
}
.sort-item:hover{transform:scale(1.06)}
.sort-item.placed{background:rgba(34,197,94,.22);border-color:rgba(34,197,94,.55)}

/* 智能体流程模拟 */
.agent-flow{display:flex;flex-direction:column;gap:0}
.af-node{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.13);border-radius:14px;
  padding:14px 18px;display:flex;gap:14px;align-items:center;opacity:.45;transition:.45s;
}
.af-node.on{opacity:1;border-color:#67E8F9;box-shadow:0 0 24px rgba(103,232,249,.18);background:rgba(103,232,249,.08)}
.af-node.done{opacity:.85;border-color:rgba(34,197,94,.6)}
.af-ic{font-size:24px;flex:none;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.08);display:grid;place-items:center}
.af-node b{font-size:14px}.af-node span{display:block;font-size:12.5px;color:rgba(226,238,248,.6)}
.af-arrow{text-align:center;color:rgba(103,232,249,.5);padding:4px 0;font-size:15px}

/* 滑块训练演示 */
.train-ctl{display:flex;flex-direction:column;gap:16px;margin-top:6px}
.train-ctl label{font-size:13px;color:rgba(226,238,248,.75);display:flex;justify-content:space-between}
.train-ctl input{accent-color:var(--lake)}

/* ---------- 小测验 ---------- */
.quiz{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:30px;margin:30px 0;box-shadow:var(--shadow-s)}
.quiz-head{display:flex;align-items:center;gap:12px;margin-bottom:22px}
.quiz-head .qi{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,#FEF3C7,#FDE68A);border:1px solid #FCD34D;display:grid;place-items:center;font-size:23px;box-shadow:var(--shadow-s)}
.quiz-head h3{font-size:20px;font-weight:800}
.quiz-head span{font-size:13px;color:var(--ink-mute)}
.q-item{padding:20px 0;border-top:1px dashed var(--line)}
.q-item:first-of-type{border-top:none}
.q-item .q-text{font-weight:700;font-size:15.5px;margin-bottom:13px}
.q-item .q-text em{font-style:normal;color:var(--lake-deep);font-family:var(--mono);margin-right:6px}
.q-opts{display:flex;flex-direction:column;gap:9px}
.q-item .q-opt + .q-opt{margin-top:9px}
.q-opt{
  text-align:left;border:1.5px solid var(--line);border-radius:12px;padding:12px 17px;font-size:14.5px;
  transition:.2s;background:#fff;color:var(--ink);display:flex;gap:11px;align-items:center;cursor:pointer;
}
.q-opt:hover{border-color:var(--lake);background:var(--paper-2)}
/* 键盘焦点：明显的描边 + 光晕，仅键盘聚焦时显示（鼠标点击不出现） */
.q-opt:focus{outline:none}
.q-opt:focus-visible{border-color:var(--lake);box-shadow:0 0 0 3px rgba(14,165,233,.28);background:var(--paper-2)}
.q-opt .key{
  width:25px;height:25px;border-radius:8px;background:var(--paper-3);flex:none;
  display:grid;place-items:center;font-size:12.5px;font-weight:800;color:var(--ink-soft);
}
.q-opt.correct{border-color:var(--grass);background:rgba(34,197,94,.09)}
.q-opt.correct .key{background:var(--grass);color:#fff}
.q-opt.wrong{border-color:var(--red);background:rgba(239,68,68,.07)}
.q-opt.wrong .key{background:var(--red);color:#fff}
.q-explain{display:none;margin-top:11px;font-size:13.5px;padding:12px 15px;border-radius:10px;background:rgba(6,182,212,.08);color:#155B6B}
.q-explain.show{display:block;animation:rise .3s}
.quiz-result{display:none;margin-top:20px;padding:22px;border-radius:var(--r-m);text-align:center;font-weight:700}
.quiz-result.show{display:block;animation:rise .4s}
.quiz-result.pass{background:rgba(34,197,94,.1);color:#166534}
.quiz-result.fail{background:rgba(245,158,11,.1);color:#8A5A10}

/* ---------- 视频课程卡 ---------- */
.lessons{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0}
.lesson{background:#fff;border-radius:var(--r-m);overflow:hidden;border:1px solid var(--line);transition:.3s;cursor:pointer}
.lesson:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:rgba(6,182,212,.35)}
.lesson-thumb{aspect-ratio:16/9;position:relative;display:grid;place-items:center;overflow:hidden}
.lesson-thumb canvas,.lesson-thumb .lt-bg{position:absolute;inset:0;width:100%;height:100%}
.play-btn{
  position:relative;z-index:3;width:60px;height:60px;border-radius:50%;
  background:rgba(255,255,255,.94);
  display:grid;place-items:center;transition:.3s;
  box-shadow:0 12px 30px rgba(3,105,161,.28),0 0 0 6px rgba(255,255,255,.22);
}
.play-btn::before{
  content:"";width:0;height:0;border-style:solid;border-width:10px 0 10px 17px;
  border-color:transparent transparent transparent #0E7490;margin-left:4px;
}
.lesson:hover .play-btn{transform:scale(1.1);background:#fff;box-shadow:0 16px 38px rgba(3,105,161,.4),0 0 0 8px rgba(6,182,212,.18)}
.lesson-duration{position:absolute;right:10px;bottom:10px;z-index:3;background:rgba(8,24,43,.72);color:#fff;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:7px;backdrop-filter:blur(4px)}
.lesson-live{position:absolute;left:10px;top:10px;z-index:3;font-size:10.5px;font-weight:800;letter-spacing:.08em;color:#CFFAFE;background:rgba(8,24,43,.6);padding:3px 9px;border-radius:7px;backdrop-filter:blur(4px)}
.lesson-body{padding:17px 18px 19px}
.lesson-body h4{font-size:15.5px;font-weight:800;margin-bottom:6px}
.lesson-body p{font-size:13px;color:var(--ink-soft)}
.lesson-meta{display:flex;gap:14px;margin-top:12px;font-size:12px;color:var(--ink-mute)}

/* 视频播放模态 */
.modal-mask{
  position:fixed;inset:0;background:rgba(4,10,20,.82);backdrop-filter:blur(8px);
  z-index:5000;display:none;place-items:center;padding:24px;
}
.modal-mask.show{display:grid;animation:fadein .25s}
.player-modal{width:min(920px,100%);background:var(--night-1);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--shadow-l);border:1px solid rgba(255,255,255,.1)}
.player-top{display:flex;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid rgba(255,255,255,.08)}
.player-top b{color:#fff;font-size:15px}
.player-top span{font-size:12.5px;color:rgba(226,238,248,.5)}
.player-close{margin-left:auto;width:36px;height:36px;border-radius:10px;color:#fff;font-size:18px;background:rgba(255,255,255,.08)}
.player-close:hover{background:rgba(255,255,255,.18)}
.player-stage{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden}
.player-stage canvas{position:absolute;inset:0;width:100%;height:100%}
.player-subtitle{
  position:absolute;left:50%;bottom:16px;transform:translateX(-50%);max-width:88%;
  background:rgba(0,0,0,.72);padding:9px 20px;border-radius:10px;font-size:14.5px;
  text-align:center;line-height:1.6;transition:opacity .3s;
}
.player-chapter{
  position:absolute;left:16px;top:14px;background:rgba(0,0,0,.6);padding:5px 13px;border-radius:999px;
  font-size:12.5px;font-weight:700;color:#67E8F9;
}
.player-ctrl{display:flex;align-items:center;gap:14px;padding:13px 20px;border-top:1px solid rgba(255,255,255,.08)}
.p-play{width:38px;height:38px;border-radius:50%;background:var(--grad-main);color:#fff;font-size:14px;display:grid;place-items:center;flex:none}
.p-track{flex:1;height:6px;border-radius:99px;background:rgba(255,255,255,.14);cursor:pointer;position:relative}
.p-track i{position:absolute;left:0;top:0;height:100%;border-radius:99px;background:var(--grad-main);width:0}
.p-track b{position:absolute;top:50%;width:13px;height:13px;border-radius:50%;background:#fff;transform:translate(-50%,-50%);left:0;box-shadow:0 0 8px rgba(103,232,249,.8)}
.p-time{font-family:var(--mono);font-size:12.5px;color:rgba(226,238,248,.65);min-width:96px;text-align:right}

/* ---------- 精品微课 V2 增强控件 ---------- */
.player-modal{width:min(980px,100%)}
.p-lessonno{
  font-size:11.5px;font-weight:700;color:#67E8F9;white-space:nowrap;letter-spacing:.5px;
  background:rgba(103,232,249,.12);border:1px solid rgba(103,232,249,.32);padding:4px 12px;border-radius:999px;
}
.p-btn{
  width:34px;height:34px;border-radius:50%;flex:none;display:grid;place-items:center;cursor:pointer;
  background:rgba(255,255,255,.08);color:#EAF6FF;font-size:13px;transition:background .2s,color .2s;
}
.p-btn:hover{background:rgba(103,232,249,.28);color:#A5F3FC}
.p-speed{
  height:32px;min-width:50px;padding:0 10px;border-radius:999px;flex:none;cursor:pointer;
  background:rgba(255,255,255,.08);color:#A5F3FC;font-family:var(--mono);font-weight:700;font-size:12.5px;
  border:1px solid transparent;transition:.2s;
}
.p-speed:hover{border-color:rgba(103,232,249,.4);background:rgba(103,232,249,.14)}
.p-play{transition:transform .15s}
.p-play:hover{transform:scale(1.08)}
/* 分节进度条 */
.player-segments{position:absolute;left:18px;right:18px;bottom:58px;z-index:6;display:flex;gap:5px;height:6px;pointer-events:none}
.player-segments i{
  flex:1 1 auto;background:rgba(255,255,255,.22);border-radius:99px;pointer-events:auto;cursor:pointer;
  transition:background .2s,transform .2s;
}
.player-segments i:hover{background:rgba(103,232,249,.55);transform:scaleY(1.5)}
.player-segments i.on{background:linear-gradient(90deg,#67E8F9,#38BDF8);box-shadow:0 0 8px rgba(103,232,249,.7)}
/* 片尾结束卡 */
.player-end{position:absolute;inset:0;z-index:20;display:none;place-items:center;background:rgba(5,9,18,.85);backdrop-filter:blur(5px)}
.player-end.show{display:grid;animation:fadein .3s ease}
.pe-card{
  width:min(430px,86%);text-align:center;color:#EAF6FF;
  background:linear-gradient(160deg,rgba(20,32,58,.97),rgba(12,18,38,.97));
  border:1px solid rgba(103,232,249,.3);border-radius:22px;padding:38px 36px 32px;
  box-shadow:0 24px 70px rgba(0,0,0,.55);animation:pepop .45s cubic-bezier(.2,1.3,.4,1);
}
@keyframes pepop{from{opacity:0;transform:translateY(22px) scale(.94)}to{opacity:1;transform:none}}
.pe-card>div:first-child{filter:drop-shadow(0 0 14px rgba(245,158,11,.55))}
.pe-card b{display:block;font-size:22px;font-weight:800;margin:14px 0 8px}
.pe-card>span{font-size:14px;color:rgba(226,238,248,.62)}
.pe-btns{display:flex;gap:12px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.pe-btns .dbtn{
  appearance:none;border:1px solid rgba(255,255,255,.18);cursor:pointer;font-family:inherit;
  background:rgba(255,255,255,.08);color:#EAF6FF;font-weight:700;font-size:14.5px;padding:11px 22px;border-radius:999px;transition:.2s;
}
.pe-btns .dbtn:hover{background:rgba(255,255,255,.16)}
.pe-btns .dbtn.primary{background:linear-gradient(135deg,#06B6D4,#0EA5E9);border-color:transparent;color:#fff;box-shadow:0 8px 22px rgba(6,182,212,.35)}
.pe-btns .dbtn.primary:hover{filter:brightness(1.08)}
@media(max-width:600px){
  .p-lessonno{display:none}
  .player-segments{bottom:50px;left:12px;right:12px}
  .player-subtitle{font-size:12.5px;bottom:12px;padding:7px 14px;max-width:94%}
  .player-ctrl{gap:9px;padding:10px 12px}
  .p-time{min-width:82px;font-size:11.5px}
  .pe-card{padding:30px 22px 26px}
}

/* ---------- 动手任务 ---------- */
.task-box{border-radius:var(--r-l);padding:30px;background:linear-gradient(135deg,rgba(20,184,166,.07),rgba(6,182,212,.09));border:1px solid rgba(6,182,212,.25);margin:30px 0}
.task-box h3{font-size:20px;font-weight:800;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.task-box ol{counter-reset:t;display:flex;flex-direction:column;gap:10px;margin-top:8px}
.task-box ol li{counter-increment:t;padding-left:38px;position:relative;font-size:14.5px}
.task-box ol li::before{
  content:counter(t);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:9px;
  background:var(--grad-main);color:#fff;font-size:13px;font-weight:900;display:grid;place-items:center;
}

/* 上下页导航 */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:30px 0 10px}
.pager a{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:20px 24px;transition:.3s;
  display:flex;flex-direction:column;gap:5px;
}
.pager a:hover{box-shadow:var(--shadow-m);transform:translateY(-4px);border-color:var(--lake)}
.pager a.next{text-align:right;background:var(--grad-main);color:#fff;border:none}
.pager .p-label{font-size:12px;opacity:.7;letter-spacing:.08em;font-weight:700}
.pager .p-name{font-size:16px;font-weight:800}

/* ---------- AI 学习助手悬浮球 ---------- */
.aiball{
  position:fixed;right:22px;bottom:24px;z-index:3000;width:62px;height:62px;border-radius:50%;
  background:radial-gradient(circle at 32% 30%,#A5F3FC,#06B6D4 55%,#0E7490);
  display:grid;place-items:center;font-size:28px;cursor:grab;
  box-shadow:0 10px 34px rgba(6,182,212,.5);transition:transform .25s;user-select:none;touch-action:none;
}
.aiball:hover{transform:scale(1.08)}
.aiball.dragging{cursor:grabbing;transition:none;transform:scale(1.1)}
.aiball::before{content:"";position:absolute;inset:-7px;border-radius:50%;border:2px dashed rgba(6,182,212,.5);animation:spin 10s linear infinite}
.aipanel{
  position:fixed;right:22px;bottom:100px;z-index:3000;width:min(380px,calc(100vw - 32px));height:540px;max-height:calc(100vh - 140px);
  background:#fff;border-radius:var(--r-l);box-shadow:var(--shadow-l);display:none;flex-direction:column;overflow:hidden;
}
.aipanel.show{display:flex;animation:rise .3s}
.ai-head{background:var(--grad-night);color:#fff;padding:16px 18px;display:flex;align-items:center;gap:12px}
.ai-head .av{width:40px;height:40px;border-radius:13px;background:var(--grad-main);display:grid;place-items:center;font-size:20px}
.ai-head b{font-size:15px}.ai-head span{font-size:12px;color:rgba(226,238,248,.65);display:flex;align-items:center;gap:6px}
.ai-head .g{width:7px;height:7px;border-radius:50%;background:var(--grass)}
.ai-head .g.off{background:#9aa6b2}
.ai-head button{margin-left:auto;color:rgba(255,255,255,.7);font-size:18px;padding:4px 8px}
.ai-log{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;background:var(--paper-2)}
.ai-log .msg{font-size:13.5px;max-width:88%}
.ai-log .msg.bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-radius:4px 15px 15px 15px;box-shadow:var(--shadow-s);color:var(--ink)}
.ai-log .msg.user{align-self:flex-end;background:var(--grad-main);border-radius:15px 4px 15px 15px;color:#fff}
.ai-log .msg.typing{background:#fff;border:1px solid var(--line)}
.ai-log .msg.typing i{background:var(--ink-mute)}
.ai-quick{display:flex;gap:7px;flex-wrap:wrap;padding:10px 14px 0;background:var(--paper-2)}
.ai-quick .chip{background:#fff;border-color:var(--line);color:var(--lake-deep)}
.ai-quick .chip:hover{background:rgba(6,182,212,.08)}
/* AI 学习小工具 */
.ai-study{padding:10px 14px 0;background:var(--paper-2)}
.ais-title{font-size:11.5px;font-weight:700;color:#64748b;margin-bottom:7px;letter-spacing:.5px}
.ais-row{display:flex;gap:6px;flex-wrap:wrap}
.ais-btn{border:1px solid #a5f3fc;background:#ecfeff;color:#0e7490;border-radius:999px;font-size:12px;padding:5px 11px;cursor:pointer;transition:.15s;white-space:nowrap}
.ais-btn:hover{background:var(--lake-deep);border-color:var(--lake-deep);color:#fff;transform:translateY(-1px)}
.ai-input{display:flex;gap:9px;padding:12px 14px;border-top:1px solid var(--line);background:#fff}
.ai-input input{flex:1;border:1px solid var(--line);border-radius:999px;padding:10px 16px;outline:none}
.ai-input input:focus{border-color:var(--lake)}
.ai-input button{width:40px;height:40px;border-radius:50%;background:var(--grad-main);color:#fff;font-size:16px;flex:none}

/* ---------- 滚动显现动画 ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1),box-shadow .3s,border-color .3s}
.reveal.in{opacity:1;transform:none}
/* 入场完成后恢复各卡片自身的 hover 位移（特异性需高于 .reveal.in） */
.zone-card.reveal.in:hover{transform:translateY(-7px)}
.lesson.reveal.in:hover,.gcard.reveal.in:hover{transform:translateY(-6px)}
.feat.reveal.in:hover,.path-step.reveal.in:hover,.mini-card.reveal.in:hover{transform:translateY(-5px)}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}

/* ---------- 动画关键帧 ---------- */
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
@keyframes blink{50%{opacity:0}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
@keyframes ping{0%{transform:scale(1);opacity:.8}100%{transform:scale(1.7);opacity:0}}
@keyframes marquee{to{transform:translateX(-50%)}}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes fadein{from{opacity:0}to{opacity:1}}
@keyframes bouncedot{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-6px);opacity:1}}
@keyframes shimmer{to{background-position:200% center}}
@keyframes shakeX{0%,100%{transform:translateX(0)}25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}

.gradient-text-anim{
  background:linear-gradient(90deg,#67E8F9,#A78BFA,#F0ABFC,#67E8F9);background-size:200% auto;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:shimmer 5s linear infinite;
}

/* 徽章成就 */
.achieve-toast{
  position:fixed;left:50%;top:86px;transform:translate(-50%,-20px);z-index:4000;
  background:var(--night-1);color:#fff;padding:14px 24px;border-radius:999px;display:flex;gap:12px;align-items:center;
  box-shadow:var(--shadow-l);border:1px solid rgba(245,158,11,.5);opacity:0;pointer-events:none;transition:.4s;font-size:14px;font-weight:700;
}
.achieve-toast.show{opacity:1;transform:translate(-50%,0)}
.achieve-toast .medal{font-size:24px}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1024px){
  .zones-grid{grid-template-columns:repeat(2,1fr)}
  .path-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .goals{grid-template-columns:repeat(2,1fr)}
  .lessons{grid-template-columns:repeat(2,1fr)}
  .cards-3{grid-template-columns:1fr 1fr}
  .hero-inner{grid-template-columns:1fr;gap:20px}
  .hero-visual{height:320px;order:-1}
  /* minmax(0,1fr) 防止 grid 子项被 nowrap 目录条的内容最小宽撑破 */
  .zone-layout{grid-template-columns:minmax(0,1fr);gap:18px}
  #zoneRoot{min-width:0}
  /* 目录在平板/手机变为横向滑动章节条 */
  .toc{
    position:static;display:block;white-space:nowrap;overflow-x:auto;min-width:0;
    margin:0 -22px;padding:2px 22px 12px;-webkit-overflow-scrolling:touch;
  }
  .toc h5,.toc-progress,.toc-progress-wrap{display:none}
  .toc a{display:inline-block;border-left:none;border-bottom:2px solid transparent;margin:0 3px 0 0}
  .toc a.active{border-left:none;border-bottom-color:var(--lake)}
  .nn-wrap,.pstudio,.hw-grid,.diffusion-wrap,.showcase,.duo{grid-template-columns:1fr}
  .duo.rev>*:first-child{order:0}
}
@media (max-width:680px){
  .section{padding:56px 0}
  .nav-links{
    position:fixed;top:64px;left:14px;right:14px;flex-direction:column;background:#fff;border-radius:18px;
    padding:12px;box-shadow:var(--shadow-l);gap:2px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{color:var(--ink-soft)!important;padding:12px 16px}
  .nav-toggle{display:flex}
  .zones-grid,.path-grid,.feat-grid,.goals,.lessons,.cards-3,.sort-game,.judge-grid,.pager{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .cta-band{padding:38px 26px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nn-wrap{grid-template-columns:1fr}
  .zone-card{min-height:0}
  .aiball{width:54px;height:54px;font-size:24px;right:16px;bottom:18px}
  .aipanel{right:16px;bottom:84px}
  .demo-stage{padding:18px 15px}
  .diffusion-wrap{grid-template-columns:1fr}
  .sort-game{grid-template-columns:1fr}
}

/* ============================================================
   手机端精细适配（≤760px）
   ============================================================ */
@media (max-width:760px){
  /* 基础容器与字号 */
  .wrap{padding:0 16px}
  .section{padding:48px 0}
  .section-tight{padding:34px 0}
  .toc{margin:0 -16px;padding:2px 16px 12px}
  #tuCode{font-size:16px!important} /* 覆盖内联13px，防iOS聚焦缩放 */
  .prose{font-size:15.5px}
  .prose h3{font-size:17.5px}

  /* 顶部导航 */
  .nav{padding:12px 0}
  .nav-inner{gap:12px}
  .brand{font-size:15px;gap:9px}
  .brand-logo{width:36px;height:36px;border-radius:11px;font-size:19px}
  .brand small{display:none}
  .nav-links{top:60px;left:12px;right:12px;padding:10px}
  .nav-links a{min-height:44px;display:flex;align-items:center}

  /* 首页 Hero */
  .hero{padding:96px 0 48px;min-height:100vh}
  .hero-visual{height:250px}
  .hero h1{font-size:clamp(28px,7vw,38px)}
  .hero p.lead{font-size:15px;margin:18px 0 26px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 150px;justify-content:center;padding:13px 18px}
  .hero-stats{gap:20px;margin-top:34px}
  .hero-stat b{font-size:25px}
  .hero-stat span{font-size:12px}
  .marquee{padding:11px 0}
  .marquee-track{font-size:13px;gap:32px}

  /* 专区头部与目标卡 */
  .zone-hero{padding:98px 0 36px}
  .zone-hero .lead{font-size:15px}
  .zone-tags{margin-top:16px}
  .goals{margin-top:-22px;gap:12px}
  .goal{padding:18px 16px}

  /* 章节 */
  .chapter{margin-bottom:42px;scroll-margin-top:78px}
  .chapter-head{gap:12px;margin-bottom:18px}
  .chapter-num{width:44px;height:44px;border-radius:14px;font-size:16px}
  .chapter-head h2{font-size:20px}

  /* 内容组件 */
  .note{padding:16px;gap:10px;font-size:13.5px;margin:18px 0}
  .note .n-ic{font-size:19px}
  .pane{padding:18px}
  .mini-card{padding:18px 16px}
  .steps{margin:18px 0}
  .step-row{gap:12px;padding-bottom:20px}
  .step-row::before{left:18px;top:38px}
  .step-dot{width:38px;height:38px}
  .step-body{padding:14px 16px}
  .tl{padding-left:28px;margin:20px 0}
  .codeblock pre{font-size:12px;line-height:1.85;padding:14px}
  table.tbl{font-size:13.5px;min-width:460px}

  /* 演示台：内部栅格全部单列 */
  .dg{grid-template-columns:1fr!important;gap:18px}
  .dg-radar{text-align:center}
  .dg-radar canvas{max-width:340px;margin:0 auto}
  .demo-bar{padding:12px 14px;gap:8px 10px;flex-wrap:wrap}
  .demo-bar .demo-badge{margin-left:0}
  .demo-stage{padding:18px 14px}
  .chat-demo{height:380px}
  .chat-input-row{gap:8px}
  .chat-input-row input{padding:11px 15px}
  .p-score{flex-wrap:wrap;gap:12px}
  textarea{font-size:16px} /* ≥16px 防止 iOS 聚焦自动放大 */

  /* 卡片/任务/测验 */
  .quiz{padding:22px 16px;margin:24px 0}
  .quiz-head .qi{width:40px;height:40px;font-size:20px}
  .q-opt{padding:12px 14px;font-size:14px;min-height:46px}
  .task-box{padding:24px 18px;margin:24px 0}
  .path-step{padding:22px 18px}
  .feat{padding:22px 18px}
  .zone-cover{height:150px}
  .zone-body{padding:18px 18px 20px}
  .cta-band{padding:32px 20px;border-radius:var(--r-l)}

  /* 微课播放器：全屏化 */
  .modal-mask{padding:0}
  .player-modal{
    width:100%;height:100vh;border-radius:0;border:none;
    display:flex;flex-direction:column;justify-content:flex-end;
  }
  .player-top{flex:none;padding:10px 14px;gap:10px}
  .player-top span{display:none}
  .player-close{width:40px;height:40px;flex:none}
  .player-stage{aspect-ratio:auto;flex:1 1 auto}
  .player-chapter{left:12px;top:10px;font-size:11.5px}
  .player-subtitle{font-size:12.5px;bottom:10px;padding:7px 12px;max-width:94%}
  .player-segments{bottom:46px;left:10px;right:10px}
  .player-ctrl{flex:none;gap:8px;padding:10px 10px calc(10px + env(safe-area-inset-bottom));min-height:44px}
  .p-play{width:42px;height:42px}
  .p-btn{width:40px;height:40px}
  .p-speed{height:38px;min-width:48px}
  .p-track{height:18px} /* 加宽触控轨道，视觉仍为细条 */
  .p-track i{top:6px;height:6px}
  .p-track b{top:9px}
  .p-time{min-width:74px;font-size:11px}
  .pe-card{width:92%}
  .pe-card b{font-size:19px}

  /* AI 助手面板：近全屏 */
  .aipanel{
    left:10px;right:10px;top:calc(62px + env(safe-area-inset-top));
    bottom:calc(82px + env(safe-area-inset-bottom));
    width:auto;height:auto;max-height:none;border-radius:18px;
  }
  .aiball{bottom:calc(16px + env(safe-area-inset-bottom))}
  .ai-head{padding:13px 14px}
  .ai-log{padding:12px;gap:9px}
  .ai-log .msg{font-size:13px;max-width:92%}
  .ai-input{padding:10px 12px calc(10px + env(safe-area-inset-bottom))}
  .ai-input input{font-size:16px}

  /* 页脚与成就提示 */
  .footer{padding:44px 0 24px}
  .footer-grid{gap:24px}
  .achieve-toast{
    left:12px;right:12px;top:calc(70px + env(safe-area-inset-top));transform:translateY(-20px);
    justify-content:center;font-size:12.5px;padding:12px 16px;text-align:center;
  }
  .achieve-toast.show{transform:translateY(0)}

  /* 动态视口高度：消除移动端地址栏伸缩抖动 */
  @supports(height:100dvh){
    .hero{min-height:100dvh}
    .player-modal{height:100dvh}
  }
}

/* 小屏手机（≤420px） */
@media (max-width:420px){
  .footer-grid{grid-template-columns:1fr;gap:20px}
  .hero-stats{gap:16px}
  .hero-stat{flex:1 1 38%}
  .pe-btns .dbtn{flex:1 1 100%;min-height:46px}
  .demo-bar span{display:none}
  .player-top b{font-size:13.5px}
  .q-item .q-text{font-size:14.5px}
}

/* 触屏设备：交互控件 ≥40px 热区 */
@media (pointer:coarse){
  .dbtn{min-height:40px;display:inline-flex;align-items:center;justify-content:center}
  .chip,.opt{min-height:38px;display:inline-flex;align-items:center}
  .p-speed:hover,.p-btn:hover{background:rgba(255,255,255,.08)} /* 避免触摸滞留 hover 态 */
}

/* ============================================================
   V5：声音控件 / 三段式分区 / 学习进度 / 测验增强 / 拓展课
   ============================================================ */

/* ---------- 播放器顶部工具按钮 ---------- */
.p-tools{margin-left:auto;display:flex;align-items:center;gap:8px}
.player-close{margin-left:0}
.p-icon{
  width:36px;height:36px;border-radius:10px;flex:none;display:grid;place-items:center;
  cursor:pointer;font-size:15px;font-style:normal;line-height:1;
  background:rgba(255,255,255,.08);color:#EAF6FF;border:1px solid transparent;transition:.2s;
}
.p-icon:hover{background:rgba(103,232,249,.22)}
.p-icon.on{background:rgba(103,232,249,.2);border-color:rgba(103,232,249,.45);color:#A5F3FC}
.p-icon.off{opacity:.42;filter:grayscale(.6)}
.p-icon .cc-txt{font-family:var(--mono);font-weight:800;font-size:11px;letter-spacing:.5px}

/* ---------- 专区三段式：快捷锚点条 ---------- */
.phase-nav{
  position:sticky;top:78px;z-index:30;display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
  margin:8px 0 30px;padding:8px;border-radius:16px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border:1px solid var(--line);box-shadow:var(--shadow-s);
}
.phase-nav a{
  display:flex;align-items:center;gap:9px;padding:11px 15px;border-radius:11px;
  font-size:14px;font-weight:700;color:var(--ink);transition:.2s;
}
.phase-nav a:hover{background:var(--paper-2);transform:translateY(-1px)}
.phase-nav a b{
  width:26px;height:26px;flex:none;border-radius:8px;display:grid;place-items:center;
  font-size:14px;color:#fff;background:linear-gradient(135deg,#06B6D4,#0EA5E9);
}
.phase-nav a:nth-child(2) b{background:linear-gradient(135deg,#8B5CF6,#6366F1)}
.phase-nav a:nth-child(3) b{background:linear-gradient(135deg,#F59E0B,#FB923C)}
.phase-nav a em{margin-left:auto;font-style:normal;font-size:11.5px;font-weight:700;color:var(--ink-mute)}
.phase-nav a em.ok{color:var(--grass)}

/* ---------- 分区大段容器 ---------- */
.learn-phase{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-s);margin-bottom:38px;overflow:hidden;scroll-margin-top:140px;
}
.learn-phase::before{content:"";position:absolute;left:0;top:0;right:0;height:4px}
#ph-know::before{background:linear-gradient(90deg,#06B6D4,#0EA5E9)}
#ph-lessons::before{background:linear-gradient(90deg,#8B5CF6,#6366F1)}
#ph-quiz::before{background:linear-gradient(90deg,#F59E0B,#FB923C)}
.phase-head{display:flex;align-items:center;gap:14px;padding:22px 26px 16px}
.phase-no{
  width:44px;height:44px;flex:none;border-radius:14px;display:grid;place-items:center;
  font-size:20px;font-weight:900;color:#fff;background:linear-gradient(135deg,#06B6D4,#0EA5E9);
  box-shadow:0 8px 18px rgba(6,182,212,.3);
}
#ph-lessons .phase-no{background:linear-gradient(135deg,#8B5CF6,#6366F1);box-shadow:0 8px 18px rgba(139,92,246,.3)}
#ph-quiz .phase-no{background:linear-gradient(135deg,#F59E0B,#FB923C);box-shadow:0 8px 18px rgba(245,158,11,.3)}
.phase-ic{font-size:26px}
.phase-ti{display:flex;flex-direction:column;gap:3px}
.phase-ti b{font-size:19px;font-weight:800;color:var(--ink)}
.phase-ti span{font-size:13px;color:var(--ink-mute)}
.phase-body{padding:0 26px 26px}
.phase-body > :last-child{margin-bottom:0!important}
.phase-body .chapter:last-child{margin-bottom:0}

/* ---------- 微课卡：完成 / 续看标记、拓展课 ---------- */
.lessons{grid-template-columns:repeat(4,1fr)}
.lesson-done-badge{
  position:absolute;right:10px;top:10px;z-index:4;font-size:10.5px;font-weight:800;
  color:#fff;background:linear-gradient(135deg,#22C55E,#16A34A);padding:3px 9px;border-radius:6px;
  box-shadow:0 4px 10px rgba(22,163,74,.35);
}
.lesson-resume{
  position:absolute;left:10px;bottom:10px;z-index:4;font-size:10.5px;font-weight:800;
  color:#fff;background:rgba(245,158,11,.95);padding:3px 9px;border-radius:6px;
}
.lesson.is-done{border-color:rgba(34,197,94,.45)}
.lesson.is-done .lesson-thumb .lt-bg{filter:saturate(1.05)}
.lesson-ext{border:1.5px dashed rgba(245,158,11,.55);background:linear-gradient(180deg,#FFFDF7,#fff)}
.lesson-ext .lesson-live{color:#FDE68A;background:rgba(120,53,15,.55)}

/* ---------- 首页：总进度 / 专区卡进度 ---------- */
.total-progress{
  max-width:720px;margin:0 auto 36px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  justify-content:center;font-size:14px;font-weight:700;color:var(--ink-soft);
}
.total-progress b{font-size:16px;color:var(--lake-deep)}
.total-progress.done b{color:var(--grass)}
.total-track{
  flex:1 1 100%;height:9px;border-radius:99px;background:rgba(15,43,70,.08);overflow:hidden;
}
.total-track i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#06B6D4,#22C55E);transition:width .6s ease}
.zone-pct{
  position:absolute;left:14px;bottom:12px;z-index:2;font-size:12.5px;font-weight:800;color:#fff;
  background:rgba(7,17,31,.55);padding:3px 11px;border-radius:999px;backdrop-filter:blur(4px);
}
.zone-prog{display:block;margin-top:14px;height:6px;border-radius:99px;background:rgba(6,182,212,.13);overflow:hidden;position:relative}
.zone-prog i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#06B6D4,#22C55E);transition:width .5s}
.zone-prog em{
  position:absolute;left:0;top:10px;font-style:normal;font-size:12px;font-weight:700;color:var(--lake-deep);
}
.zone-full{border-color:rgba(34,197,94,.45)!important}

/* ---------- 测验：通关标记、结果回顾与按钮 ---------- */
.quiz.is-passed{border-color:rgba(245,158,11,.45)}
.quiz-head .qi.badge-on{box-shadow:0 0 0 4px rgba(245,158,11,.22);position:relative}
.quiz-head .qi.badge-on::after{
  content:"✓";position:absolute;right:-6px;top:-6px;width:20px;height:20px;border-radius:50%;
  background:var(--grass);color:#fff;font-size:12px;font-weight:900;display:grid;place-items:center;
  border:2px solid #fff;
}
.qr-title{font-size:15.5px;font-weight:800;margin-bottom:13px}
.qr-title b{font-size:18px}
.qr-review{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:16px}
.qr-review span{font-size:12.5px;font-weight:800;padding:4px 12px;border-radius:999px}
.qr-review .good{background:rgba(34,197,94,.18);color:#166534}
.qr-review .bad{background:rgba(239,68,68,.14);color:#B91C1C}
.qr-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.qr-btn{
  border:none;border-radius:999px;padding:10px 22px;font-weight:800;font-size:13.5px;cursor:pointer;
  color:#fff;background:linear-gradient(135deg,#0E7490,#0369A1);transition:.2s;
}
.qr-btn:hover{transform:translateY(-2px);box-shadow:0 8px 18px rgba(3,105,161,.3)}
.qr-btn.qr-wrong{background:linear-gradient(135deg,#F59E0B,#EA580C)}

/* ---------- V5 响应式 ---------- */
@media(max-width:760px){
  .p-tools{gap:6px}
  .p-icon{width:36px;height:36px;font-size:14px}
  .phase-nav{top:66px;gap:6px;padding:6px;margin-bottom:22px}
  .phase-nav a{padding:9px 8px;gap:6px;font-size:12.5px;justify-content:center}
  .phase-nav a span{white-space:nowrap}
  .phase-nav a em{display:none}
  .learn-phase{border-radius:16px;margin-bottom:28px}
  .phase-head{padding:18px 18px 12px;gap:11px}
  .phase-no{width:38px;height:38px;font-size:17px;border-radius:12px}
  .phase-ic{font-size:22px}
  .phase-ti b{font-size:16.5px}
  .phase-ti span{font-size:12px}
  .phase-body{padding:0 16px 18px}
}
@media(max-width:680px){
  .lessons{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .lessons{grid-template-columns:1fr}
  .phase-nav a b{width:22px;height:22px;font-size:12px;border-radius:7px}
  .phase-ic{display:none}
  .qr-btn{width:100%;padding:12px}
}

/* ============================================================
   站务页面（简介/帮助/反馈/地图/搜索/隐私/协议）
   ============================================================ */
.static-title{font-size:30px;color:var(--night-1);margin:0 0 24px;font-weight:800}
.static-prose{max-width:880px}
.static-prose h3{margin-top:30px;color:var(--night-1)}
.static-prose mark{background:#fef08a;border-radius:3px;padding:0 2px}

/* 站务页（浅色背景）导航默认深色文字 */
.light-nav .brand{color:var(--ink)}
.light-nav .nav-links a{color:var(--ink-soft)}
.light-nav .nav-links a:hover,.light-nav .nav-links a.active{background:rgba(14,116,144,.1);color:var(--lake-deep)}
.light-nav .nav-toggle span{background:var(--ink)}

/* 搜索结果 */
.search-result-item{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;background:#fff;border:1px solid #e6edf5;border-radius:12px;margin-bottom:10px;transition:.18s}
.search-result-item:hover{border-color:#67E8F9;box-shadow:0 6px 18px rgba(14,116,144,.1);transform:translateY(-2px)}
.sri-ic{font-size:24px;width:46px;height:46px;display:flex;align-items:center;justify-content:center;background:#f0f9ff;border-radius:11px;flex-shrink:0}
.sri-txt{display:flex;flex-direction:column;gap:4px;min-width:0}
.sri-txt b{font-size:15px;color:var(--night-1);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.sri-txt span{font-size:13px;color:#64748b;line-height:1.6}

/* 全站知识搜索增强 */
.sr-summary{font-size:13.5px;color:#64748b;margin:4px 0 14px}
.sr-summary b{color:var(--lake-deep,#0d9488)}
.sr-group{margin-bottom:18px}
.sr-group-title{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:#334155;margin-bottom:9px;padding-bottom:7px;border-bottom:1px solid #e6edf5}
.sr-group-title em{font-style:normal;font-size:11.5px;font-weight:600;color:#fff;background:var(--lake-deep,#0d9488);border-radius:9px;padding:1px 8px}
.sr-knowledge .sri-go{margin-left:auto;align-self:center;font-size:12px;color:var(--lake-deep,#0d9488);background:#f0fdfa;border:1px solid #99f6e4;border-radius:999px;padding:4px 12px;white-space:nowrap;flex-shrink:0}
.sr-zone{font-size:12.5px!important}
.sr-badge{font-size:10.5px;font-weight:600;font-style:normal;border-radius:6px;padding:1px 7px;line-height:1.6}
.sr-badge.k-chapter{background:#e0f2fe;color:#0369a1}
.sr-badge.k-lesson{background:#f3e8ff;color:#7e22ce}
.sr-badge.k-demo{background:#dcfce7;color:#15803d}
.sr-knowledge mark,.search-result-item mark{background:#fef08a;color:#854d0e;border-radius:3px;padding:0 2px}
.search-hot{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:-6px 0 16px;font-size:13px;color:#64748b}
.search-hot button{border:1px solid #e6edf5;background:#fff;color:#475569;border-radius:999px;padding:5px 13px;font-size:12.5px;cursor:pointer;transition:.15s}
.search-hot button:hover{border-color:var(--lake-deep,#0d9488);color:var(--lake-deep,#0d9488);background:#f0fdfa}
@media(max-width:640px){
  .sr-knowledge .sri-go{display:none}
  .sri-ic{width:38px;height:38px;font-size:19px}
}

/* 反馈表单 */
.fb-form{display:flex;flex-direction:column;gap:16px;max-width:680px}
.fb-row{display:flex;flex-direction:column;gap:7px}
.fb-row label{font-size:14px;font-weight:700;color:#334155}
.fb-row label i{color:#ef4444;font-style:normal}
.fb-row input,.fb-row select,.fb-row textarea{padding:11px 13px;border:1px solid #d5dee8;border-radius:9px;font-size:14px;font-family:inherit;resize:vertical;background:#fff}
.fb-row input:focus,.fb-row select:focus,.fb-row textarea:focus{outline:none;border-color:#0EA5E9;box-shadow:0 0 0 3px rgba(14,165,233,.14)}
.fb-actions{display:flex;align-items:center;gap:16px}
.fb-count{font-size:12px;color:#94a3b8}

/* 页脚新增：法务链接行 / 备案信息行 */
.footer-legal{display:flex;gap:22px;flex-wrap:wrap;margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}
.footer-legal a{display:inline-block;padding:0;font-size:13px;color:var(--ink-mute)}
.footer-legal a:hover{color:var(--lake-deep)}
.fb-filing{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.fb-filing a{display:inline;padding:0;color:var(--ink-mute)}
.fb-filing a:hover{color:var(--lake-deep)}
.fb-filing .police{display:inline-flex;align-items:center;gap:4px}

@media(max-width:768px){
  .static-title{font-size:24px}
  .footer-legal{gap:14px}
  .fb-filing{gap:10px;font-size:12px}
}

/* ============================================================
   我的学习中心
   ============================================================ */
.my-hero{display:flex;gap:30px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);padding:28px 32px;box-shadow:var(--shadow-s)}
.my-ring{position:relative;width:150px;height:150px;flex-shrink:0}
.my-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--paper-3);stroke-width:10}
.ring-fg{fill:none;stroke:url(#ringGrad);stroke:#06B6D4;stroke-width:10;stroke-linecap:round;transition:stroke-dashoffset .8s ease}
.ring-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
.ring-center b{font-size:30px;color:var(--night-1);font-weight:800;line-height:1}
.ring-center span{font-size:12px;color:var(--ink-mute)}

.my-summary{flex:1;min-width:0}
.my-summary h3{font-size:22px;color:var(--night-1);margin:0 0 8px}
.my-summary p{font-size:13.5px;color:var(--ink-soft);line-height:1.7;margin:0 0 14px}
.my-stat-chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.msc{display:inline-flex;align-items:center;gap:6px;background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--ink-soft)}
.msc i{font-style:normal}
.msc b{color:var(--lake-deep)}
.my-actions{display:flex;gap:10px}

.my-sec-title{font-size:18px;color:var(--night-1);margin:28px 0 14px}
.my-zone-list{display:flex;flex-direction:column;gap:10px}
.my-zone-row{display:flex;align-items:center;gap:14px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);padding:15px 20px;transition:.18s}
.my-zone-row:hover{border-color:var(--lake);box-shadow:var(--shadow-s);transform:translateX(3px)}
.my-zone-row.is-pass{background:linear-gradient(90deg,#f0fdf4,var(--paper) 60%)}
.mz-ic{width:44px;height:44px;border-radius:12px;background:var(--paper-2);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.mz-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:8px}
.mz-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.mz-head b{font-size:15px;color:var(--night-1)}
.mz-badge{font-size:12px;padding:2px 10px;border-radius:999px;white-space:nowrap}
.mz-todo{background:var(--paper-3);color:var(--ink-mute)}
.mz-doing{background:#fff7e6;color:#b45309}
.mz-pass{background:#dcfce7;color:#15803d}
.mz-bar{height:7px;background:var(--paper-3);border-radius:99px;overflow:hidden}
.mz-bar i{display:block;height:100%;background:var(--grad-main);border-radius:99px;transition:width .6s ease}
.mz-pct{font-size:15px;font-weight:800;color:var(--lake-deep);min-width:46px;text-align:right}

/* 学习足迹 + 备份换机面板 */
.my-fp-pane{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:16px;margin-top:16px}
.mfp-col{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);padding:20px 22px;box-shadow:var(--shadow-s)}
.mfp-col h4{font-size:15.5px;color:var(--night-1);margin:0 0 12px}
.mfp-tip{font-size:12.5px;color:var(--ink-mute);line-height:1.7;margin:0 0 12px}
.mfp-stats{display:flex;gap:14px}
.mfp-stat{flex:1;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-m);padding:14px 10px;text-align:center}
.mfp-stat b{display:block;font-size:24px;color:var(--lake-deep);font-weight:800;line-height:1.2;white-space:nowrap}
.mfp-stat span{font-size:12px;color:var(--ink-mute)}
.mfp-btns{display:flex;gap:10px;flex-wrap:wrap}
.mfp-box{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.mfp-box textarea{width:100%;box-sizing:border-box;padding:10px 12px;border:1px solid #d5dee8;border-radius:9px;font-size:12px;font-family:ui-monospace,Consolas,monospace;line-height:1.6;resize:vertical;background:var(--paper-2);color:var(--ink-soft);word-break:break-all}
.mfp-box textarea:focus{outline:none;border-color:var(--lake);box-shadow:0 0 0 3px rgba(14,165,233,.12)}
.mfp-box .mfp-btns{margin-top:10px}

/* 连续学习打卡 */
.streak-box{margin-top:14px;background:linear-gradient(135deg,#fff7ed,#fff);border:1px solid #fed7aa;border-radius:var(--r-m);padding:14px 16px}
.sb-head{display:flex;align-items:center;gap:11px;flex-wrap:wrap}
.sb-flame{font-size:30px;animation:flamePulse 1.6s ease-in-out infinite}
@keyframes flamePulse{0%,100%{transform:scale(1) rotate(-3deg)}50%{transform:scale(1.12) rotate(3deg)}}
.sb-num{display:flex;align-items:baseline;gap:6px}
.sb-num b{font-size:28px;font-weight:900;color:#ea580c;line-height:1}
.sb-num span{font-size:13px;color:#9a3412}
.sb-tip{margin-left:auto;font-size:12px;color:#9ca3af;background:#f3f4f6;border-radius:999px;padding:4px 12px}
.sb-tip.done{color:#15803d;background:#dcfce7}
.sb-tip.warn{color:#c2410c;background:#ffedd5}
.sb-week{display:flex;gap:8px;margin-top:13px;justify-content:space-between}
.sb-day{flex:1;display:flex;flex-direction:column;align-items:center;gap:5px}
.sb-day i{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-style:normal;background:#f3f4f6;color:#9ca3af;border:2px solid transparent;font-weight:600}
.sb-day.done i{background:linear-gradient(135deg,#fb923c,#f97316);color:#fff;box-shadow:0 3px 8px rgba(249,115,22,.3)}
.sb-day.today i{border-color:#ea580c;box-shadow:0 0 0 3px rgba(234,88,12,.15)}
.sb-day:not(.done).today i{background:#fff7ed;color:#ea580c}
/* 里程碑徽章 */
.sb-badges{margin-top:14px;padding-top:13px;border-top:1px dashed #fdba74}
.sbm-title{font-size:12.5px;font-weight:700;color:#9a3412;margin-bottom:10px}
.sbm-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.sbm-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 4px;border-radius:10px;background:#fafaf9;border:1px solid #f0eeeb;text-align:center;filter:grayscale(1);opacity:.5;transition:.2s}
.sbm-item.got{filter:none;opacity:1;background:linear-gradient(135deg,#fff7ed,#fef3c7);border-color:#fcd34d;box-shadow:0 2px 8px rgba(245,158,11,.12)}
.sbm-ic{font-size:24px;line-height:1}
.sbm-name{font-size:11.5px;font-weight:600;color:#57534e}

/* ============ 教师备课中心 ============ */
.teacher-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin:14px 0 18px}
.teacher-sub{color:var(--ink-soft);font-size:14px;line-height:1.8;max-width:760px;margin:8px 0 0}
.teacher-actions{display:flex;gap:9px;flex-wrap:wrap}
.teacher-layout{display:grid;grid-template-columns:240px 1fr;gap:16px;align-items:start}
.teacher-side{padding:12px;margin-bottom:0;position:sticky;top:16px}
.ts-title{font-size:12.5px;font-weight:700;color:var(--ink-mute);letter-spacing:1px;padding:4px 10px 10px}
.ts-item{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:none;border:none;border-radius:10px;padding:9px 10px;cursor:pointer;transition:.15s}
.ts-item:hover{background:var(--paper-2)}
.ts-item.active{background:linear-gradient(135deg,rgba(13,148,136,.1),rgba(34,197,94,.08));box-shadow:inset 3px 0 0 var(--lake-deep)}
.ts-ic{font-size:20px}
.ts-name{font-size:13.5px;font-weight:600;color:var(--ink)}
.ts-meta{margin-left:auto;font-size:10.5px;color:var(--ink-mute);background:var(--paper-3);border-radius:7px;padding:1px 7px;white-space:nowrap}
.teacher-main{padding:0;min-height:400px}
.tm-empty{padding:70px 20px;text-align:center;color:var(--ink-mute);line-height:2}

/* 教案文档 */
.lp-doc{padding:30px 34px;font-size:14px;line-height:1.9;color:#1f2937;max-width:860px;margin:0 auto}
.lp-cover{border-bottom:3px solid var(--lake-deep);padding-bottom:20px;margin-bottom:8px}
.lp-kicker{font-size:12px;font-weight:700;letter-spacing:2px;color:var(--lake-deep)}
.lp-cover h2{font-size:26px;margin:8px 0 12px;color:#0f172a}
.lp-meta-line{font-size:13px;color:#64748b;margin-top:4px}
.lp-sec{padding:18px 0;border-bottom:1px dashed #e2e8f0}
.lp-sec h3{font-size:17px;color:#0f766e;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.lp-soft{color:#64748b;font-size:13.5px}
.lp-list{padding-left:20px;display:flex;flex-direction:column;gap:7px}
.lp-list li{font-size:13.5px}
.lp-goals{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.lp-goal{display:flex;gap:11px;background:#f8fafc;border:1px solid #e6edf5;border-radius:10px;padding:12px 14px}
.lpg-no{font-size:11px;font-weight:700;color:#fff;background:var(--lake-deep);border-radius:7px;padding:2px 8px;height:fit-content;white-space:nowrap}
.lp-goal b{font-size:13.5px;display:block;margin-bottom:3px}
.lp-goal p{font-size:12.5px;color:#64748b;margin:0}
.lp-chapters{padding-left:22px;display:flex;flex-direction:column;gap:10px}
.lp-chapters>li{font-size:14px}
.lp-kws{margin-top:5px;font-size:12.5px;color:#64748b}
.lp-kws em{font-style:normal;background:#ecfeff;color:#0e7490;border:1px solid #a5f3fc;border-radius:6px;padding:1px 8px;margin:0 5px 5px 0;display:inline-block}
.lp-res b{font-size:14px}
.lp-link{color:var(--lake-deep);font-family:ui-monospace,Consolas,monospace;font-size:12.5px;word-break:break-all}
.lp-foot{text-align:center;color:#94a3b8;font-size:12px;padding:24px 0 6px}

.teacher-toast{position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);background:rgba(15,23,42,.92);color:#fff;font-size:13.5px;padding:10px 20px;border-radius:999px;z-index:9999;opacity:0;transition:.25s;max-width:88vw}
.teacher-toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:900px){
  .teacher-layout{grid-template-columns:1fr}
  .teacher-side{position:static;display:flex;overflow-x:auto;gap:6px;padding:10px}
  .ts-title{display:none}
  .ts-item{flex:0 0 auto;width:auto}
  .ts-meta{display:none}
  .lp-doc{padding:18px 16px}
  .lp-goals{grid-template-columns:1fr}
}

/* ============ 荣誉证书 ============ */
.cert-head{margin:14px 0 16px}
.cert-toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;margin-bottom:16px}
.ct-name{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-soft)}
.ct-name input{border:1px solid var(--line);border-radius:9px;padding:8px 12px;font-size:14px;outline:none;min-width:200px}
.ct-name input:focus{border-color:var(--lake);box-shadow:0 0 0 3px rgba(14,165,233,.12)}
.ct-actions{display:flex;gap:9px}
.cert-tabs{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:16px}
.cert-tab{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 16px;font-size:13.5px;cursor:pointer;transition:.15s;color:var(--ink-soft)}
.cert-tab em{font-style:normal;font-size:11px;color:#fff;background:#f59e0b;border-radius:8px;padding:1px 7px;font-weight:700}
.cert-tab:hover{border-color:var(--lake-deep)}
.cert-tab.active{background:linear-gradient(135deg,#0d9488,#22c55e);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(13,148,136,.25)}
.cert-tab.active em{background:rgba(255,255,255,.25)}
.cert-stage{display:flex;justify-content:center}
.cert-canvas{width:100%;max-width:860px;height:auto;border-radius:14px;box-shadow:0 12px 40px rgba(15,23,42,.16);background:#fff}
.cert-none{text-align:center;padding:60px 20px;color:var(--ink-mute)}
.cert-none h3{margin:16px 0 8px;color:var(--ink);font-size:20px}
.cert-none p{line-height:2;margin-bottom:22px}

/* 打印：只保留证书画布（跨页居中） */
@media print{
  #siteNav,#siteFooter,.cert-toolbar,.cert-tabs,.cert-head,.crumb{display:none !important}
  body{background:#fff}
  .cert-canvas{box-shadow:none;max-width:100%;border-radius:0}
  @page{size:landscape;margin:8mm}
}

/* 打印：只保留教案主体 */
@media print{
  #siteNav,#siteFooter,.teacher-side,.teacher-head .teacher-actions,.lp-print-hint{display:none !important}
  body{background:#fff}
  .teacher-layout{display:block}
  .teacher-main{box-shadow:none;border:none}
  .lp-doc{padding:0;max-width:100%;font-size:12.5px;line-height:1.75}
  .lp-sec{break-inside:avoid-page;padding:10px 0}
  .lp-cover h2{font-size:20px}
  .lp-goal,.lp-chapters li,.lp-kws em{break-inside:avoid}
  a{color:#000;text-decoration:none}
}

/* 手机端：头部纵向居中、进度行允许换行（须置于桌面规则之后，避免被覆盖） */
@media(max-width:768px){
  .my-hero{flex-direction:column;align-items:center;text-align:center;padding:22px 18px;gap:18px}
  .my-summary{width:100%;min-width:0}
  .my-summary p{margin:8px auto}
  .my-stat-chips{justify-content:center}
  .my-actions{justify-content:center;flex-wrap:wrap}
  .my-zone-row{flex-wrap:wrap;gap:8px}
  .mz-pct{margin-left:auto}

  /* 足迹/备份面板纵向堆叠 */
  .my-fp-pane{grid-template-columns:minmax(0,1fr);gap:12px}
  .mfp-col{padding:18px 16px;min-width:0}
  .mfp-stat b{font-size:20px}
  .mfp-btns .btn{flex:1;min-width:130px}
}


/* ============================================================
   公告栏（顶部固定条 + 详情弹窗）
   ============================================================ */
.ann-bar{
  position:fixed;top:0;left:0;right:0;z-index:1002;height:40px;
  display:flex;align-items:center;color:#fff;font-size:14px;
  box-shadow:0 2px 12px rgba(15,34,55,.18);
}
.ann-bar.t-event{background:linear-gradient(120deg,#F59E0B,#FB923C 55%,#EC4899)}
.ann-bar.t-notice{background:linear-gradient(120deg,#0EA5E9,#6366F1)}
.ann-bar.t-tip{background:linear-gradient(120deg,#22C55E,#06B6D4)}
.ann-inner{display:flex;align-items:center;gap:12px;width:100%}
.ann-main{display:flex;align-items:center;gap:9px;flex:1;min-width:0;color:#fff;text-align:left;padding:0;background:none}
.ann-ic{flex:none;font-size:16px}
.ann-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600}
.ann-more{flex:none;font-size:12.5px;font-weight:700;background:rgba(255,255,255,.22);padding:3px 10px;border-radius:999px;transition:.2s}
.ann-main:hover .ann-more{background:rgba(255,255,255,.38)}
.ann-x{flex:none;width:26px;height:26px;border-radius:8px;color:#fff;font-size:13px;background:rgba(255,255,255,.18);transition:.2s}
.ann-x:hover{background:rgba(255,255,255,.36)}
body.has-ann{padding-top:40px}
body.has-ann #siteNav,body.has-ann #readBar{top:40px}

.ann-modal{
  width:min(560px,100%);max-height:84vh;display:flex;flex-direction:column;
  background:#fff;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-l);
}
.am-head{display:flex;align-items:center;justify-content:space-between;padding:15px 20px;border-bottom:1px solid var(--line);background:var(--paper-2);flex:none}
.am-head b{font-size:16px;color:var(--ink)}
.am-close{width:32px;height:32px;border-radius:9px;background:#E2ECF5;color:var(--ink-soft);font-size:14px}
.am-close:hover{background:#d3e0ef}
.am-list{padding:18px 20px;overflow-y:auto;display:flex;flex-direction:column;gap:14px}
.am-card{border:1px solid var(--line);border-radius:14px;padding:14px 16px;background:#fff}
.am-meta{display:flex;align-items:center;gap:10px;margin-bottom:7px}
.am-tag{font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px}
.am-tag.t-event{background:rgba(245,158,11,.14);color:#B45309}
.am-tag.t-notice{background:rgba(14,165,233,.13);color:var(--lake-deep)}
.am-tag.t-tip{background:rgba(34,197,94,.14);color:#15803D}
.am-date{font-size:12.5px;color:var(--ink-mute)}
.am-card h4{font-size:15.5px;color:var(--ink);line-height:1.6;margin-bottom:6px}
.am-card p{font-size:14px;color:var(--ink-soft);line-height:1.8}
.am-cta{display:inline-block;margin-top:10px;font-size:13.5px;font-weight:700;color:var(--lake-deep)}
.am-cta:hover{text-decoration:underline}

@media (max-width:640px){
  .ann-bar{height:36px;font-size:12.5px}
  body.has-ann{padding-top:36px}
  body.has-ann #siteNav,body.has-ann #readBar{top:36px}
  .ann-more{display:none}
  .ann-ic{font-size:14px}
}
@media print{
  .ann-bar,.ann-mask{display:none!important}
  body.has-ann{padding-top:0}
  body.has-ann #siteNav,body.has-ann #readBar{top:0}
}

/* ============================================================
   账号：导航登录状态 + 登录/注册页
   ============================================================ */
.nav-auth{display:flex;align-items:center;gap:8px;flex:none}
.nav-auth a,.nav-auth button{
  display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;
  padding:7px 14px;border-radius:999px;transition:.25s;white-space:nowrap;
}
.na-login{color:var(--lake-deep);background:rgba(6,182,212,.1);border:1px solid rgba(6,182,212,.2)}
.na-login:hover{background:rgba(6,182,212,.18)}
.na-signup{color:#fff;background:var(--grad-main);box-shadow:0 4px 14px rgba(6,182,212,.3)}
.na-signup:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(6,182,212,.42)}
.na-user{color:var(--ink);background:#fff;border:1px solid var(--line);max-width:150px;box-shadow:var(--shadow-s)}
.na-user span:last-child{overflow:hidden;text-overflow:ellipsis}
.na-avatar{
  width:22px;height:22px;flex:none;border-radius:50%;display:grid;place-items:center;
  background:var(--grad-main);color:#fff;font-size:12px;font-weight:800;
}
.na-logout{
  color:var(--ink-soft);background:#fff;border:1px solid var(--line);
  padding:6px 12px!important;font-size:12.5px!important;
}
.na-logout:hover{background:rgba(239,68,68,.08);border-color:rgba(239,68,68,.4);color:var(--red)}

/* ---------- 登录/注册：浅色极光双栏 ---------- */
.auth-page{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:96px 0 56px;overflow:hidden;
  background:
    radial-gradient(680px 420px at 88% 4%,rgba(6,182,212,.14),transparent 62%),
    radial-gradient(600px 460px at 0% 92%,rgba(56,189,248,.12),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#ECF5FE 100%);
}
/* 浅色点阵（替代原星空） */
.auth-stars{
  position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 22%, rgba(14,116,144,.25), transparent 60%),
    radial-gradient(1.4px 1.4px at 28% 68%, rgba(14,165,233,.22), transparent 60%),
    radial-gradient(1.2px 1.2px at 45% 12%, rgba(14,116,144,.2), transparent 60%),
    radial-gradient(1.8px 1.8px at 62% 30%, rgba(6,182,212,.28), transparent 60%),
    radial-gradient(1.2px 1.2px at 78% 18%, rgba(14,116,144,.18), transparent 60%),
    radial-gradient(1.5px 1.5px at 88% 62%, rgba(14,165,233,.2), transparent 60%),
    radial-gradient(1.2px 1.2px at 8% 82%, rgba(14,116,144,.18), transparent 60%),
    radial-gradient(1.5px 1.5px at 38% 88%, rgba(20,184,166,.22), transparent 60%),
    radial-gradient(1.2px 1.2px at 70% 82%, rgba(14,116,144,.16), transparent 60%),
    radial-gradient(1.5px 1.5px at 95% 38%, rgba(6,182,212,.2), transparent 60%);
  animation:starTwinkle 4.5s ease-in-out infinite alternate;
}
@keyframes starTwinkle{from{opacity:.35}to{opacity:.75}}
/* 青蓝光斑（去紫） */
.auth-orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;pointer-events:none}
.auth-orb.orb-a{width:420px;height:420px;left:-120px;top:-110px;background:radial-gradient(circle,rgba(6,182,212,.35),transparent 65%)}
.auth-orb.orb-b{width:460px;height:460px;right:-140px;bottom:-150px;background:radial-gradient(circle,rgba(56,189,248,.32),transparent 65%)}

.auth-page .crumb{position:relative;z-index:1}
.auth-shell{
  position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;
  border-radius:26px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-l);background:#fff;
  animation:authIn .7s cubic-bezier(.22,1,.36,1) both;
}
@keyframes authIn{from{opacity:0;transform:translateY(26px) scale(.985)}to{opacity:1;transform:none}}

/* 左栏：青蓝渐变品牌区（保留沉浸感） */
.auth-aside{
  position:relative;display:flex;flex-direction:column;color:#fff;
  padding:42px 40px 34px;border-right:1px solid var(--line);
  background:
    radial-gradient(420px 260px at 90% 0%,rgba(165,243,252,.28),transparent 60%),
    linear-gradient(160deg,#0E7490 0%,#0369A1 55%,#075985 100%);
}
.auth-aside::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:38px 38px;
  -webkit-mask-image:radial-gradient(90% 80% at 100% 0,#000 20%,transparent 80%);
  mask-image:radial-gradient(90% 80% at 100% 0,#000 20%,transparent 80%);
}
.auth-aside>*{position:relative}
.auth-back{align-self:flex-start;font-size:13px;font-weight:600;color:rgba(255,255,255,.82);padding:6px 12px;border-radius:999px;transition:.25s}
.auth-back:hover{color:#fff;background:rgba(255,255,255,.14)}
.aa-logo{
  width:72px;height:72px;margin:26px 0 20px;border-radius:22px;font-size:38px;
  display:grid;place-items:center;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
  box-shadow:0 14px 36px rgba(3,105,161,.4);
}
.aa-title{font-size:30px;font-weight:900;line-height:1.32;color:#fff;letter-spacing:.01em}
.aa-slogan{margin-top:12px;font-size:15px;line-height:1.8;color:rgba(232,245,252,.85)}
.aa-perks{margin-top:26px;display:flex;flex-direction:column;gap:13px}
.aa-perks li{display:flex;align-items:center;gap:12px;font-size:13.5px;color:rgba(232,245,252,.9)}
.aa-perks li i{
  width:34px;height:34px;flex:none;display:grid;place-items:center;font-size:16px;font-style:normal;
  border-radius:11px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#A5F3FC;
}
.aa-perks b{color:#fff;font-weight:800}
.aa-foot{margin-top:auto;padding-top:26px;font-size:11px;letter-spacing:.16em;color:rgba(232,245,252,.5)}

/* 右栏：白色表单 */
.auth-card{padding:40px 42px 30px;text-align:center;display:flex;flex-direction:column;justify-content:center;background:#fff}
.auth-brand{margin-bottom:8px}
.auth-logo{
  width:58px;height:58px;margin:0 auto;border-radius:18px;background:var(--grad-main);
  display:none;place-items:center;font-size:30px;box-shadow:0 10px 26px rgba(6,182,212,.35);
}
.auth-card h2{font-size:23px;font-weight:900;color:var(--ink)}
.auth-sub{font-size:13.5px;color:var(--ink-mute);margin:6px 0 22px}
.auth-tabs{display:flex;gap:6px;background:var(--paper-2);border:1px solid var(--line);border-radius:999px;padding:5px;margin-bottom:22px}
.auth-tab{flex:1;padding:10px 0;border-radius:999px;font-size:14.5px;font-weight:800;color:var(--ink-mute);transition:.25s}
.auth-tab.is-active{color:#fff;background:var(--grad-main);box-shadow:0 6px 18px rgba(6,182,212,.32)}
.auth-form{display:flex;flex-direction:column;gap:14px;text-align:left}
.auth-field{display:flex;flex-direction:column;gap:6px}
.auth-field span{font-size:13px;font-weight:700;color:var(--ink-soft)}
.auth-field span i{color:var(--red);font-style:normal}
.auth-field input{
  padding:12px 15px;border:1px solid var(--line);border-radius:11px;font-size:14.5px;
  font-family:inherit;background:#fff;color:var(--ink);transition:.2s;
}
.auth-field input::placeholder{color:#A4B7C9}
.auth-field input:focus{outline:none;border-color:var(--lake);box-shadow:0 0 0 3px rgba(6,182,212,.18)}
.auth-form .btn-block{display:block;width:100%;margin-top:4px;padding:13px;font-size:15.5px;letter-spacing:.06em}
.auth-switch{margin-top:16px;font-size:13.5px;color:var(--ink-mute)}
.auth-switch a{color:var(--lake-deep);font-weight:700}
.auth-switch a:hover{text-decoration:underline}
.auth-note{
  margin-top:18px;background:var(--paper-2);border:1px solid var(--line);border-radius:13px;
  padding:12px 14px;display:flex;flex-direction:column;gap:4px;text-align:left;
}
.auth-note b{font-size:12.5px;color:var(--ink-soft)}
.auth-note span{font-size:12px;line-height:1.75;color:var(--ink-mute)}

/* 忘记密码链接 / 下拉框 / 密保与兜底提示 */
.auth-field .af-label{display:flex;align-items:center;justify-content:space-between;gap:8px}
.af-forgot{font-size:12px;font-weight:600;color:var(--lake-deep);white-space:nowrap}
.af-forgot:hover{text-decoration:underline}
.auth-select{
  padding:11px 14px;border:1px solid var(--line);border-radius:11px;font-size:13.5px;
  font-family:inherit;background:#fff;color:var(--ink);transition:.2s;cursor:pointer;
}
.auth-select:focus{outline:none;border-color:var(--lake);box-shadow:0 0 0 3px rgba(6,182,212,.18)}
.auth-select option{background:#fff;color:var(--ink)}
.fp-q{
  background:rgba(6,182,212,.08);border:1px solid rgba(6,182,212,.25);border-radius:11px;
  padding:11px 14px;font-size:13px;color:var(--lake-ink);margin-bottom:2px;
}
.fp-q b{color:var(--lake-deep);font-weight:800}
.fp-warn{
  display:flex;flex-direction:column;gap:8px;background:#FFF7ED;
  border:1px solid #FED7AA;border-radius:12px;padding:14px;margin-bottom:12px;
}
.fp-warn b{font-size:13.5px;color:#B45309}
.fp-warn span{font-size:12.5px;line-height:1.8;color:#9A6A24}
.auth-form .btn-danger{
  display:block;width:100%;padding:12px;border-radius:999px;font-size:14.5px;font-weight:800;
  letter-spacing:.05em;color:#fff;background:linear-gradient(135deg,#ef4444,#f97316);
  box-shadow:0 8px 22px rgba(239,68,68,.32);transition:.25s;
}
.auth-form .btn-danger:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(239,68,68,.42)}

@media (max-width:900px){
  .auth-page{padding:88px 0 40px}
  .auth-shell{grid-template-columns:1fr}
  .auth-aside{display:none}
  .auth-card{padding:32px 26px 26px}
  .auth-brand{display:block}
  .auth-logo{display:grid}
}
@media (max-width:480px){
  .auth-card{padding:26px 18px 22px}
  .auth-card h2{font-size:21px}
  .auth-shell{border-radius:20px}
  /* 顶部导航：窄屏隐藏积分胶囊（我的中心可查看），防止汉堡按钮被挤出屏幕 */
  .nav-inner{gap:8px}
  .nav-points{display:none}
}

@media (max-width:768px){
  .nav-auth{margin-left:auto;gap:6px}
  .nav-auth a,.nav-auth button{padding:6px 11px;font-size:12.5px}
  .na-user span:last-child{display:none}
  .nav-toggle{margin-left:0}
}

/* 我的学习中心 · 账号状态卡 */
.my-account{
  display:flex;align-items:center;gap:14px;padding:14px 18px;margin-bottom:16px;
  border-radius:var(--r-m);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-s);
}
.my-account.guest{background:linear-gradient(120deg,#f0f9ff,#fff);border-color:#bae6fd}
.my-account .ma-ic{font-size:28px;flex:none}
.my-account .ma-avatar{
  width:44px;height:44px;flex:none;border-radius:50%;background:var(--grad-main);color:#fff;
  display:grid;place-items:center;font-size:20px;font-weight:900;
}
.my-account .ma-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.my-account .ma-info b{font-size:15.5px;color:var(--ink)}
.my-account .ma-info span{font-size:12.5px;color:var(--ink-mute);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.my-account .ma-actions{flex:none}
@media (max-width:640px){
  .my-account{padding:12px 14px;gap:10px}
  .my-account .ma-actions .btn{padding:7px 12px;font-size:12.5px}
}

/* ============================================================
   付费会员体系：金色主按钮 / 首页锁卡 / 专区付费墙 / 会员页 / 弹层
   ============================================================ */
.btn-gold{background:linear-gradient(135deg,#F59E0B,#F97316);color:#fff;box-shadow:0 8px 22px rgba(245,158,11,.35)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(245,158,11,.45)}
.na-crown{margin-right:3px;font-size:13px}

/* hero 上的会员标签 */
.zone-tags .zt-vip{background:linear-gradient(135deg,#FDE68A,#FBBF24);color:#7C4A03;font-weight:800;border-color:#FCD34D}
/* 锁定态：目录隐藏，付费墙独占整行 */
.zone-layout.is-locked{grid-template-columns:1fr}
.zone-layout.is-locked #zoneToc{display:none}

/* 首页会员专区卡片 */
.zone-card.zone-vip .zone-cover img{filter:saturate(.85) brightness(.92)}
.zone-card.zone-vip{border-color:#F3E2BE}
.zone-vip-tag{
  position:absolute;top:12px;left:12px;z-index:2;padding:4px 11px;border-radius:999px;
  font-size:12px;font-weight:800;color:#7C4A03;background:linear-gradient(135deg,#FDE68A,#FBBF24);
  border:1px solid #FCD34D;box-shadow:var(--shadow-s);
}
.zone-vip-lock{
  position:absolute;inset:0;z-index:1;display:grid;place-items:center;
  color:#fff;text-shadow:0 2px 10px rgba(8,24,43,.5);font-size:40px;
  background:rgba(11,24,44,.22);opacity:0;transition:.3s;backdrop-filter:blur(1px);
}
.zone-card.zone-vip:hover .zone-vip-lock{opacity:1}
.zone-prog-vip{background:linear-gradient(90deg,rgba(245,158,11,.14),rgba(251,191,36,.08))!Important}
.zone-prog-vip em{color:#B45309!important;font-weight:800}

/* 专区页付费墙 */
.paywall{
  position:relative;overflow:hidden;margin:18px 0 50px;padding:54px 40px 42px;text-align:center;
  border-radius:var(--r-xl);color:#EAF6FF;
  background:
    radial-gradient(620px 320px at 50% -20%,rgba(103,232,249,.2),transparent 60%),
    linear-gradient(155deg,#0E7490 0%,#0B4A6B 52%,#083550 100%);
  border:1px solid rgba(165,243,252,.25);
  box-shadow:0 24px 60px rgba(3,105,161,.26),inset 0 1px 0 rgba(255,255,255,.14);
}
.paywall::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:42px 42px;
  -webkit-mask-image:radial-gradient(70% 80% at 50% 0,#000 10%,transparent 75%);
  mask-image:radial-gradient(70% 80% at 50% 0,#000 10%,transparent 75%);
}
.paywall>*{position:relative}
.pw-glow{
  position:absolute;width:360px;height:360px;border-radius:50%;filter:blur(100px);opacity:.32;pointer-events:none;
  top:-160px;left:50%;transform:translateX(-50%);
  background:radial-gradient(circle,#FCD34D,transparent 65%);
}
.pw-lock{font-size:52px;line-height:1;filter:drop-shadow(0 6px 18px rgba(252,211,77,.45))}
.pw-badge{
  display:inline-block;margin:14px 0 6px;padding:5px 16px;border-radius:999px;font-size:13px;font-weight:800;
  color:#5B3A06;background:linear-gradient(135deg,#FDE68A,#FBBF24);
}
.paywall h2{color:#fff;font-size:25px;font-weight:900;margin-bottom:10px}
.pw-lead{font-size:14px;line-height:1.9;color:rgba(232,245,252,.82);margin-bottom:26px}
.pw-plans{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:24px}
.pw-plan{
  position:relative;min-width:132px;padding:16px 20px;border-radius:16px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(6px);
  display:flex;flex-direction:column;gap:3px;
}
.pw-plan.is-hot{border-color:#FCD34D;background:rgba(252,211,77,.14);box-shadow:0 10px 26px rgba(252,211,77,.2)}
.pw-plan em{
  position:absolute;top:-10px;left:50%;transform:translateX(-50%);
  font-style:normal;font-size:11px;font-weight:800;color:#5B3A06;padding:2px 10px;border-radius:999px;
  background:linear-gradient(135deg,#FDE68A,#FBBF24);white-space:nowrap;
}
.pw-plan b{font-size:14px;color:rgba(232,245,252,.9);font-weight:700}
.pw-plan strong{font-size:26px;color:#FCD34D;font-weight:900}
.pw-plan span{font-size:12px;color:rgba(232,245,252,.6)}
.pw-rights{display:grid;grid-template-columns:1fr 1fr;gap:8px 26px;max-width:680px;margin:0 auto 26px;text-align:left}
.pw-rights li{font-size:13px;line-height:1.7;color:rgba(232,245,252,.88);list-style:none}
.pw-cta{display:inline-block;padding:14px 46px;font-size:16px;letter-spacing:.08em}
.pw-note{margin-top:14px;font-size:12px;color:rgba(234,244,255,.45);line-height:1.8}
.pw-back{margin-top:10px}
.pw-back a{font-size:13px;color:#7DD3FC}
.pw-back a:hover{text-decoration:underline}
@media (max-width:640px){
  .paywall{padding:40px 20px 32px}
  .pw-rights{grid-template-columns:1fr}
  .pw-plan{min-width:calc(50% - 7px);padding:14px}
}

/* 会员开通页 */
.vp-h{font-size:18px;font-weight:900;color:var(--ink);margin:26px 0 14px}
.vip-guest{
  margin:26px 0 60px;padding:56px 30px;text-align:center;background:#fff;border-radius:20px;
  border:1px solid var(--line);box-shadow:var(--shadow-m);
}
.vip-guest .vg-icon{font-size:50px;margin-bottom:12px}
.vip-guest h2{font-size:22px;font-weight:900;margin-bottom:8px}
.vip-guest p{color:var(--ink-mute);font-size:14px;margin-bottom:22px}
.vip-status{
  display:flex;align-items:center;gap:16px;padding:18px 22px;margin-top:18px;border-radius:18px;
  background:linear-gradient(110deg,#FFF7E8,#FDF2FF);border:1px solid #EAD7B8;box-shadow:var(--shadow-s);
}
.vip-status .vs-icon{font-size:34px;flex:none}
.vip-status .vs-info{flex:1;display:flex;flex-direction:column;gap:3px}
.vip-status .vs-info b{font-size:16px;color:#7C2D12}
.vip-status .vs-info span{font-size:13px;color:#92613A}
.vip-status .vs-badge{flex:none;font-size:12.5px;font-weight:800;color:#92613A;background:#fff;padding:6px 14px;border-radius:999px;border:1px solid #EAD7B8}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.plan-card{
  position:relative;text-align:center;padding:26px 16px 20px;border-radius:18px;cursor:pointer;
  background:#fff;border:2px solid var(--line);transition:.25s;font-family:inherit;
}
.plan-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-m)}
.plan-card.is-sel{border-color:#F59E0B;background:linear-gradient(180deg,#FFFBEB,#fff);box-shadow:0 12px 30px rgba(245,158,11,.2)}
.plan-tag{
  position:absolute;top:-11px;left:50%;transform:translateX(-50%);font-style:normal;
  font-size:11.5px;font-weight:800;color:#fff;padding:3px 13px;border-radius:999px;
  background:linear-gradient(135deg,#F59E0B,#F97316);white-space:nowrap;
}
.plan-name{display:block;font-size:16px;font-weight:800;color:var(--ink)}
.plan-price{display:block;margin:8px 0 2px;font-size:38px;font-weight:900;color:#D97706;line-height:1.1}
.plan-price small{font-size:17px;vertical-align:6px;margin-right:2px}
.plan-days{display:block;font-size:13px;color:var(--ink-mute)}
.plan-perm{display:block;margin-top:6px;font-size:11.5px;color:var(--ink-mute)}
.plan-radio{
  display:block;width:18px;height:18px;margin:12px auto 0;border-radius:50%;
  border:2px solid var(--line);position:relative;
}
.plan-card.is-sel .plan-radio{border-color:#F59E0B}
.plan-card.is-sel .plan-radio::after{
  content:'';position:absolute;inset:3px;border-radius:50%;
  background:linear-gradient(135deg,#F59E0B,#F97316);
}
.pay-channels{display:flex;gap:14px}
.pay-ch{
  flex:1;display:flex;align-items:center;gap:12px;padding:16px 20px;border-radius:16px;
  background:#fff;border:2px solid var(--line);cursor:pointer;font-family:inherit;transition:.2s;
}
.pay-ch:hover{border-color:#FBBF24}
.pay-ch.is-active{border-color:#F59E0B;background:#FFFBEB}
.pay-ch .pc-ic{font-size:26px;flex:none}
.pay-ch b{font-size:15px;color:var(--ink)}
.pay-ch em{margin-left:auto;font-style:normal;font-size:12px;color:var(--ink-mute)}
.pay-action{text-align:center;margin:26px 0 10px}
#payBtn{padding:15px 70px;font-size:17px;letter-spacing:.1em;border-radius:999px}
.pay-fine{margin-top:12px;font-size:12px;line-height:1.9;color:var(--ink-mute)}
.vip-rights-card{
  margin:30px 0 60px;padding:24px 28px;border-radius:18px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-s);
}
.vip-rights-card h3{font-size:16px;font-weight:900;margin-bottom:12px}
.vip-rights-card ul{display:grid;grid-template-columns:1fr 1fr;gap:9px 24px}
.vip-rights-card li{font-size:13.5px;color:var(--ink-soft);list-style:none;line-height:1.6}
.vr-contact{margin-top:14px;font-size:12.5px;color:var(--ink-mute)}
@media (max-width:720px){
  .plan-grid{grid-template-columns:1fr;gap:12px}
  .pay-channels{flex-direction:column;gap:10px}
  .vip-rights-card ul{grid-template-columns:1fr}
}

/* 支付弹层 */
.pay-modal{
  position:relative;width:min(380px,92vw);padding:30px 28px 24px;border-radius:22px;background:#fff;text-align:center;
}
.pm-close{
  position:absolute;top:12px;right:14px;width:30px;height:30px;border-radius:50%;border:none;
  background:var(--paper-3);color:var(--ink-mute);font-size:14px;cursor:pointer;
}
.pm-demo{
  margin:-6px 0 14px;padding:9px 12px;border-radius:10px;font-size:12px;line-height:1.6;
  color:#92400E;background:#FEF3C7;border:1px solid #FCD34D;
}
.pay-modal h3{font-size:19px;font-weight:900;margin-bottom:6px}
.pm-amount{font-size:14px;color:var(--ink-mute)}
.pm-amount b{font-size:30px;color:#D97706;font-weight:900;margin:0 2px}
.pm-amount span{font-size:12.5px}
.pm-qr{
  width:210px;height:210px;margin:16px auto 12px;padding:8px;border-radius:14px;
  border:1px solid var(--line);display:grid;place-items:center;background:#fff;
}
.pm-qr img,.pm-qr canvas{display:block}
.pm-qr-fallback{font-size:12px;color:var(--red);padding:20px;line-height:1.8}
/* 个人微信收款码（固定图片，竖版） */
.pm-qr.is-wxqr{width:236px;height:auto;padding:10px;background:#fff}
.pm-qr .pm-wxqr{width:100%;height:auto;border-radius:10px;display:block}
.pm-steps{text-align:left;margin:2px auto 0;padding-left:20px;font-size:12.5px;color:var(--ink-soft);line-height:1.95}
.pm-steps b{color:#D97706;font-weight:800}
.pm-tip{font-size:13.5px;color:var(--ink-soft)}
.pm-status{margin-top:10px;font-size:13px;font-weight:700;color:var(--lake-deep);min-height:20px}
.pm-order{margin-top:12px;font-size:11px;color:var(--ink-mute);word-break:break-all}
@media(max-width:760px){
  /* 收款码弹窗竖图较高：遮罩允许滚动，卡片 margin:auto 保证顶部可达 */
  .modal-mask{padding:12px;overflow-y:auto;-webkit-overflow-scrolling:touch}
  .pay-modal{margin:auto;width:min(360px,94vw);padding:24px 16px 18px}
  .pm-qr.is-wxqr{width:178px;padding:8px}
  .pm-steps{font-size:12px;line-height:1.8}
}

/* ============================================================
   v25：50 大专区（渐变封面/筹备态/分类筛选）、通用专区页、
   线下课堂预约、AI 会员提示条
   ============================================================ */

/* ---- 渐变兜底封面（无 cover 图的新专区） ---- */
.zone-cover.is-gradient .zone-cover-bg{position:absolute;inset:0;display:grid;place-items:center;transition:transform .5s}
.zone-card:hover .zone-cover.is-gradient .zone-cover-bg{transform:scale(1.08)}
.zone-cover.is-gradient::after{background:linear-gradient(180deg,transparent 45%,rgba(7,17,31,.42))}
.zcb-emoji{font-size:62px;filter:drop-shadow(0 8px 16px rgba(0,0,0,.38));position:relative;z-index:2}
.zone-card.zone-soon .zone-body p{color:var(--ink-mute)}
.zone-level-soon{background:rgba(7,17,31,.78)!important;color:#FDE68A!important;border:1px solid rgba(253,230,138,.45)}
.zone-level-offline{background:linear-gradient(135deg,#F59E0B,#EF4444)!important;color:#fff!important}
.zone-prog-soon{background:linear-gradient(90deg,rgba(245,158,11,.14),rgba(245,158,11,.05))}
.zone-prog-soon em{color:#B45309!important;font-weight:800}
.zone-prog-offline{background:linear-gradient(90deg,rgba(245,158,11,.16),rgba(239,68,68,.10))}
.zone-prog-offline em{color:#B45309!important;font-weight:800}
.zone-card.zone-offline{border-color:rgba(245,158,11,.4)}

/* ---- 分类筛选 ---- */
.zone-cats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:8px auto 26px}
.zcat{
  border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 18px;
  font-size:14px;font-weight:700;color:var(--ink-soft);cursor:pointer;transition:.25s;
  display:inline-flex;align-items:center;gap:7px;
}
.zcat em{font-style:normal;font-size:12px;background:rgba(6,182,212,.1);color:var(--lake-deep);border-radius:99px;padding:1px 8px;font-weight:800}
.zcat:hover{border-color:var(--lake);color:var(--lake-deep);transform:translateY(-1px)}
.zcat.active{background:var(--grad-main);color:#fff;border-color:transparent;box-shadow:0 8px 20px rgba(6,182,212,.32)}
.zcat.active em{background:rgba(255,255,255,.22);color:#fff}

/* ---- 通用专区页：课程大纲 / 筹备中面板 ---- */
.soon-goals{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px 30px;margin:4px 0 8px;
  box-shadow:0 10px 30px rgba(7,17,31,.06);
}
.soon-goals h3{font-size:17px;font-weight:900;margin-bottom:14px;color:var(--lake-deep)}
.soon-goals ol{list-style:none;counter-reset:sg;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:10px 26px}
.soon-goals li{counter-increment:sg;position:relative;padding-left:38px;font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.6}
.soon-goals li::before{
  content:counter(sg);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:8px;
  background:var(--grad-main);color:#fff;display:grid;place-items:center;font-size:12.5px;font-weight:900;
}
.soon{
  position:relative;overflow:hidden;text-align:center;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:54px 28px 44px;margin:10px 0;box-shadow:0 14px 40px rgba(7,17,31,.08);
}
.soon-glow{position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:420px;height:240px;filter:blur(70px);opacity:.22;pointer-events:none}
.soon-emoji{font-size:64px;line-height:1;margin-bottom:14px;position:relative}
.soon-badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.soon-pill{font-size:13px;font-weight:800;padding:5px 14px;border-radius:99px;background:#FEF3C7;color:#92400E;border:1px solid #FDE68A}
.soon-pill.vip{background:linear-gradient(135deg,#FEF3C7,#FED7AA);color:#B45309;border-color:#FDBA74}
.soon h2{font-size:24px;font-weight:900;margin-bottom:10px}
.soon-lead{max-width:640px;margin:0 auto 24px;color:var(--ink-mute);font-size:15px;line-height:1.8}
.soon-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.soon-cta .btn{min-width:190px}
#soonNotify.is-on{background:#0EA5E9}
.soon-note{margin-top:20px;font-size:13px;color:var(--ink-mute)}
.soon-back{margin-top:10px;font-size:14px}
.soon-back a{color:var(--lake-deep);font-weight:700}

/* ---- AI 会员提示条（小球面板 / 体验舱） ---- */
.ai-vip-tip{
  display:block;margin:0;padding:10px 14px;font-size:12.5px;font-weight:700;color:#92400E;
  background:linear-gradient(135deg,#FEF3C7,#FED7AA);border-bottom:1px solid #FDBA74;text-decoration:none;
}
.ai-vip-tip:hover{filter:brightness(.97)}

/* ---- 线下课堂预约页 ---- */
.offline-hero{
  position:relative;padding:128px 0 48px;color:var(--ink);overflow:hidden;
  background:
    radial-gradient(720px 360px at 85% 0%,rgba(6,182,212,.13),transparent 62%),
    radial-gradient(560px 340px at 0% 40%,rgba(252,211,77,.12),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#EDF6FE 100%);
  border-bottom:1px solid var(--line);
}
.offline-hero::after{content:"🏫";position:absolute;right:-20px;bottom:-60px;font-size:220px;opacity:.1;pointer-events:none}
.offline-hero h1{font-size:30px;font-weight:900;margin:10px 0 12px;color:var(--night-1)}
.offline-hero .lead{font-size:15.5px;color:var(--ink-soft);max-width:720px;line-height:1.8}
.offline-hero .crumb a,.offline-hero .crumb{color:var(--ink-mute)}
.offline-note{margin-top:16px;display:inline-block;background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:12px;padding:10px 16px;font-size:13px;font-weight:600;color:var(--ink-soft);box-shadow:var(--shadow-s)}
.block-h{font-size:20px;font-weight:900;margin:6px 0 18px}
.oc-list{display:grid;gap:16px}
.oc-card{
  display:grid;grid-template-columns:72px 1fr auto;gap:20px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px 24px;
  box-shadow:0 8px 26px rgba(7,17,31,.05);transition:.25s;
}
.oc-card.is-active{border-color:var(--lake);box-shadow:0 12px 32px rgba(6,182,212,.18)}
.oc-card.is-locked{background:linear-gradient(180deg,#FFFAF0,#fff)}
.oc-emoji{width:72px;height:72px;border-radius:18px;display:grid;place-items:center;font-size:38px;background:var(--grad-soft,linear-gradient(135deg,#ECFEFF,#F0F9FF));border:1px solid #CFFAFE}
.oc-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.oc-tag{font-size:12px;font-weight:800;padding:3px 10px;border-radius:99px;background:#F1F5F9;color:#475569}
.oc-tag.vip{background:linear-gradient(135deg,#FEF3C7,#FED7AA);color:#B45309}
.oc-tag.gold{background:#ECFDF5;color:#047857}
.oc-main h3{font-size:18px;font-weight:900;margin-bottom:8px}
.oc-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;font-weight:700;color:var(--ink-soft);margin-bottom:6px}
.oc-desc{font-size:13.5px;color:var(--ink-mute);line-height:1.7;margin:6px 0 10px;max-width:680px}
.oc-seats{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink-mute);max-width:420px}
.oc-seats .bar{flex:1;height:7px;border-radius:99px;background:#EEF2F7;overflow:hidden}
.oc-seats .bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#06B6D4,#22C55E)}
.oc-seats b{color:var(--lake-deep)}
.oc-action{min-width:170px;text-align:center}
.offline-book-wrap{display:grid;grid-template-columns:1fr 320px;gap:22px;align-items:start}
.offline-form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 10px 30px rgba(7,17,31,.06)}
.of-field{display:block;margin-bottom:16px}
.of-field>span{display:block;font-size:13.5px;font-weight:800;margin-bottom:7px;color:var(--ink)}
.of-field em{color:var(--red);font-style:normal}
.of-field input,.of-field select,.of-field textarea{
  width:100%;border:1.5px solid var(--line);border-radius:11px;padding:11px 13px;font-size:14.5px;
  font-family:inherit;background:#F8FAFC;transition:.2s;resize:vertical;
}
.of-field input:focus,.of-field select:focus,.of-field textarea:focus{outline:none;border-color:var(--lake);background:#fff;box-shadow:0 0 0 3px rgba(6,182,212,.12)}
.of-tip{margin-top:10px;font-size:13px;color:var(--red);font-weight:700;min-height:18px}
.of-tip.ok{color:#047857}
.offline-side{display:grid;gap:16px}
.oc-my,.oc-faq{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;box-shadow:0 8px 24px rgba(7,17,31,.05)}
.oc-my h3,.oc-faq h3{font-size:16px;font-weight:900;margin-bottom:12px}
.of-empty{font-size:13px;color:var(--ink-mute);line-height:1.7}
.my-book{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px;background:#F8FAFC}
.my-book b{font-size:14px;line-height:1.5}
.mb-line{font-size:12.5px;color:var(--ink-mute);margin-top:4px}
.mb-status{display:inline-block;margin-top:8px;font-size:11.5px;font-weight:800;padding:3px 10px;border-radius:99px;background:#E0F2FE;color:#0369A1}
.mb-status.demo{background:#FEF3C7;color:#92400E}
.oc-faq ul{list-style:none;display:grid;gap:9px}
.oc-faq li{position:relative;padding-left:18px;font-size:12.8px;color:var(--ink-mute);line-height:1.7}
.oc-faq li::before{content:"·";position:absolute;left:4px;top:-2px;font-weight:900;color:var(--lake);font-size:18px}
@media (max-width:860px){
  .oc-card{grid-template-columns:56px 1fr;gap:14px;padding:18px}
  .oc-emoji{width:56px;height:56px;font-size:30px;border-radius:14px}
  .oc-action{grid-column:1/-1;min-width:0}
  .oc-action .btn{display:block;width:100%}
  .offline-book-wrap{grid-template-columns:1fr}
}
#pmDemoBtn{display:block;width:100%;box-sizing:border-box;margin-top:10px;padding:11px;font-size:14.5px;border-radius:999px;border:none;cursor:pointer;font-weight:800}
.vip-status .vs-btn{flex:none}

/* 我的页 · 会员卡 */
.my-vip{
  display:flex;align-items:center;gap:14px;padding:15px 18px;margin-bottom:16px;border-radius:var(--r-m);
  border:1px solid #EAD7B8;box-shadow:var(--shadow-s);
}
.my-vip.is-vip{background:linear-gradient(110deg,#FFF7E8,#F6EEFF)}
.my-vip.no-vip{background:linear-gradient(110deg,#F8FAFC,#FFFDF4)}
.my-vip .mv-ic{font-size:30px;flex:none}
.my-vip .mv-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.my-vip .mv-info b{font-size:15px;color:#7C2D12}
.my-vip .mv-info span{font-size:12.5px;color:#92613A;line-height:1.6}
.my-vip .mv-actions{flex:none;display:flex;gap:8px}
@media (max-width:640px){
  .my-vip{flex-wrap:wrap;padding:13px 15px}
  .my-vip .mv-actions{width:100%}
  .my-vip .mv-actions .btn{flex:1}
}

/* 我的页 · 会员等级体系（VIP1-VIP10） */
.my-vip{flex-direction:column;align-items:stretch;gap:12px}
.my-vip .mvl-top{display:flex;align-items:center;gap:14px}
.my-vip .mvl-badge{flex:none;display:flex;flex-direction:column;align-items:center;justify-content:center;width:62px;height:62px;border-radius:16px;
  background:linear-gradient(145deg,#F59E0B,#B45309);color:#fff;box-shadow:0 4px 12px rgba(180,83,9,.35)}
.my-vip .mvl-badge i{font-size:18px;font-style:normal;line-height:1}
.my-vip .mvl-badge b{font-size:15px;line-height:1.15;margin-top:2px}
.my-vip .mvl-top .mv-info{flex:1}
.my-vip .mvl-top .mv-actions{flex:none;flex-wrap:wrap;justify-content:flex-end}
.my-vip .mvl-row{display:flex;gap:16px;align-items:stretch}
.my-vip .mvl-grow{flex:1;min-width:0;display:flex;flex-direction:column;gap:7px}
.my-vip .mvl-grow-text,.my-vip .mvl-rule{font-size:12.5px;color:#8A5A2B;line-height:1.6}
.my-vip .mvl-grow-text b,.my-vip .mvl-rule b{color:#B45309}
.my-vip .mvl-bar{display:block;height:8px;border-radius:999px;background:rgba(180,83,9,.14);overflow:hidden}
.my-vip .mvl-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#F59E0B,#D97706);transition:width .4s}
.mvl-ladder{display:flex;gap:5px}
.mvl-dot{flex:1;min-width:0;height:24px;border-radius:7px;background:#EFE7DA;color:#A98A63;font-size:11.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-style:normal}
.mvl-dot.reached{background:#F6D8A8;color:#92610E}
.mvl-dot.current{background:linear-gradient(145deg,#F59E0B,#B45309);color:#fff;box-shadow:0 2px 7px rgba(180,83,9,.4)}
.my-vip .mvl-gift-box{flex:none;width:190px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;
  padding:10px;border-radius:var(--r-s);background:rgba(255,255,255,.55);border:1px dashed #E2C48F;text-align:center}
.my-vip .mvl-gift-box .btn{width:100%;box-sizing:border-box}
.my-vip .mvl-gift-hint{font-size:11.5px;color:#A87A45;line-height:1.5}
.my-vip .mvl-cols{display:grid;grid-template-columns:1fr 1.35fr;gap:16px}
.my-vip .mvl-block h4{margin:0 0 8px;font-size:13.5px;color:#7C2D12;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.my-vip .mvl-block .mvl-sub{font-size:11.5px;font-weight:400;color:#B08A5F}
.my-vip .mvl-perks{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px}
.my-vip .mvl-perks li{font-size:12.5px;color:#8A5A2B;line-height:1.55}
.vc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.vc-card{position:relative;display:flex;flex-direction:column;gap:5px;padding:10px 11px;border-radius:var(--r-s);
  border:1px solid #EAD7B8;background:#fff;transition:transform .15s,box-shadow .15s}
a.vc-card.is-open:hover{transform:translateY(-2px);box-shadow:var(--shadow-s);border-color:#E0A94F}
.vc-card.is-lock{background:#FAF6EE;opacity:.92}
.vc-card.is-soon{background:#F3F0F9;border-color:#DDD2EE}
.vc-card .vc-ic{font-size:19px;line-height:1}
.vc-card b{font-size:13px;color:#5B3A17}
.vc-card.is-lock b{color:#9C8465}
.vc-card .vc-tag{position:absolute;top:7px;right:8px;font-style:normal;font-size:10.5px;font-weight:700;padding:1px 7px;border-radius:999px;white-space:nowrap}
.vc-tag.vc-open{background:#FEF3C7;color:#B45309}
.vc-tag.vc-lock{background:#EFE7DA;color:#96744C}
.vc-tag.vc-soon{background:#EDE9FE;color:#6D28D9}
/* 导航皇冠上的等级角标 */
.na-crown{position:relative;display:inline-block}
.na-vip-lv{position:absolute;top:-7px;right:-9px;min-width:13px;height:13px;padding:0 3px;border-radius:999px;
  background:#D97706;color:#fff;font-size:9.5px;font-style:normal;font-weight:800;line-height:13px;text-align:center}
@media (max-width:640px){
  .my-vip .mvl-top{flex-wrap:wrap}
  .my-vip .mvl-top .mv-actions{width:100%;justify-content:stretch}
  .my-vip .mvl-row{flex-direction:column}
  .my-vip .mvl-gift-box{width:auto}
  .my-vip .mvl-cols{grid-template-columns:1fr}
}

/* ============================================================
   双版本：青海版(qh) / 普通版(std)
   ============================================================ */

/* 普通版主视觉：科技蓝（清新蓝青双段） */
:root[data-edition="std"]{
  --lake:#2563EB;
  --lake-deep:#1D4ED8;
  --lake-ink:#1E3A8A;
  --sky:#3B82F6;
  --mint:#0EA5E9;
  --grad-main:linear-gradient(135deg,#0EA5E9 0%,#2563EB 70%,#3B82F6 100%);
  --grad-cool:linear-gradient(135deg,#0EA5E9,#2563EB);
  --shadow-glow:0 0 0 1px rgba(37,99,235,.2),0 10px 32px rgba(37,99,235,.18);
}
:root[data-edition="std"] ::selection{background:rgba(37,99,235,.2)}
:root[data-edition="std"] ::-webkit-scrollbar-thumb{background:linear-gradient(#7DD3FC,#60A5FA);border-radius:8px;border:2px solid var(--paper-2);background-clip:padding-box}

/* 导航上的版本切换胶囊 */
.na-edition{
  display:inline-flex;align-items:center;gap:4px;padding:8px 15px;border-radius:999px;
  font-size:13.5px;font-weight:800;color:#fff;white-space:nowrap;
  background:linear-gradient(135deg,#0EA5E9,#38BDF8);box-shadow:0 6px 16px rgba(14,165,233,.28);
  transition:transform .2s;
}
.na-edition:hover{transform:translateY(-1px)}
:root[data-edition="std"] .na-edition{background:linear-gradient(135deg,#06B6D4,#0EA5E9);box-shadow:0 6px 16px rgba(6,182,212,.28)}
@media (max-width:900px){ .na-edition{padding:7px 12px;font-size:12.5px} }

/* 页脚版本切换行 */
.footer-edition{
  margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);
  font-size:12.5px;color:var(--ink-mute);text-align:center;line-height:2;
}
.footer-edition b{color:var(--lake-deep);font-weight:800}
.footer-edition a{color:var(--lake-deep);font-weight:700}
.footer-edition a:hover{text-decoration:underline}

/* 登录页普通版免登录卡 */
.std-notice{display:block!important;max-width:460px;margin:0 auto}
.std-card{
  padding:40px 36px;border-radius:24px;text-align:center;
  background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-m);animation:authIn .5s ease both;
}
.std-card h2{color:var(--ink);font-size:23px;font-weight:900;margin:10px 0 8px}
.std-card p{color:var(--ink-soft);font-size:13.5px;line-height:1.9;margin-bottom:20px}
.std-card .btn{margin-bottom:10px}

/* ============================================================
   版本选择落地页 choose.html
   ============================================================ */
.choose-page{
  min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:40px 20px;color:var(--ink);position:relative;overflow:hidden;
  background:
    radial-gradient(760px 460px at 85% 0%,rgba(6,182,212,.13),transparent 62%),
    radial-gradient(660px 480px at 0% 100%,rgba(56,189,248,.12),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#EBF5FE 100%);
}
.choose-stars{position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:
    linear-gradient(rgba(14,116,144,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,116,144,.07) 1px,transparent 1px);
  background-size:42px 42px;
  -webkit-mask-image:radial-gradient(75% 75% at 50% 20%,#000 20%,transparent 80%);
  mask-image:radial-gradient(75% 75% at 50% 20%,#000 20%,transparent 80%);
}
.choose-head{text-align:center;margin-bottom:34px;position:relative;z-index:1}
.choose-head .ch-logo{
  font-size:34px;line-height:1;width:76px;height:76px;margin:0 auto 14px;display:grid;place-items:center;
  border-radius:24px;background:var(--grad-main);box-shadow:0 16px 40px rgba(6,182,212,.32);
}
.choose-head h1{font-size:30px;font-weight:900;margin:12px 0 8px;color:var(--night-1);letter-spacing:.02em}
.choose-head p{font-size:14.5px;color:var(--ink-mute)}
.choose-grid{
  display:grid;grid-template-columns:repeat(2,minmax(280px,380px));gap:22px;
  width:100%;max-width:820px;position:relative;z-index:1;
}
.choose-card{
  display:flex;flex-direction:column;padding:34px 30px 30px;border-radius:22px;
  background:rgba(255,255,255,.86);border:1.5px solid var(--line);
  backdrop-filter:blur(10px);box-shadow:var(--shadow-s);
  transition:transform .25s,box-shadow .25s,border-color .25s;text-align:center;color:var(--ink);
}
.choose-card:hover{transform:translateY(-6px);background:#fff;box-shadow:var(--shadow-m)}
.choose-card.cc-qh:hover{border-color:#22D3EE}
.choose-card.cc-std:hover{border-color:#38BDF8}
.choose-card .cc-ic{
  font-size:30px;line-height:1;width:68px;height:68px;margin:0 auto 12px;display:grid;place-items:center;
  border-radius:20px;background:linear-gradient(135deg,#ECFEFF,#E0F2FE);border:1px solid #CFF3FA;
}
.choose-card h2{font-size:22px;font-weight:900;color:var(--ink);margin-bottom:4px}
.choose-card .cc-en{font-size:11px;letter-spacing:.18em;color:var(--ink-mute);margin-bottom:14px}
.choose-card p{font-size:13px;line-height:1.8;color:var(--ink-soft);margin-bottom:16px;min-height:46px}
.choose-card ul{text-align:left;margin:0 0 22px;display:flex;flex-direction:column;gap:9px}
.choose-card li{font-size:13.5px;color:var(--ink-soft);list-style:none;line-height:1.5;padding-left:26px;position:relative}
.choose-card li::before{position:absolute;left:0;top:0}
.choose-card.cc-qh li::before{content:'🏔️'}
.choose-card.cc-std li::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--lake);transform:rotate(45deg);top:7px;left:4px;
}
.choose-card .cc-btn{
  margin-top:auto;padding:13px;border-radius:999px;font-size:15px;font-weight:800;color:#fff;letter-spacing:.06em;
}
.choose-card.cc-qh .cc-btn{background:linear-gradient(135deg,#06B6D4,#0EA5E9)}
.choose-card.cc-std .cc-btn{background:linear-gradient(135deg,#0EA5E9,#38BDF8)}
.choose-note{position:relative;z-index:1;margin-top:26px;font-size:12.5px;color:var(--ink-mute);text-align:center;line-height:1.9}
.choose-note a{color:var(--lake-deep);font-weight:700}
@media (max-width:720px){
  .choose-grid{grid-template-columns:1fr}
  .choose-head h1{font-size:24px}
  .choose-card p{min-height:0}
}

/* ============================================================
   v26：作品社区（gallery）、作品积分、AI 深度思考、99 会员积分抵扣
   ============================================================ */

/* ---- 导航积分胶囊（清新青蓝） ---- */
.nav-points{
  display:inline-flex;align-items:center;gap:5px;padding:6px 14px 6px 12px;
  border-radius:999px;font-size:13.5px;font-weight:800;color:var(--lake-ink);white-space:nowrap;
  background:linear-gradient(135deg,#CFFAF3,#BAEAF3);border:1px solid #8EE3EC;
  box-shadow:var(--shadow-s);transition:.22s;
}
.nav-points:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(6,182,212,.25)}
.nav-points b{font-size:15px;line-height:1}
.nav-points .np-label{font-size:11.5px;font-weight:700;opacity:.8}
.nav-points .ui-ic{width:14px;height:14px}
/* 导航栏显眼的会员入口（金色语义保留，精致化） */
.nav-vip{
  display:inline-flex;align-items:center;gap:6px;padding:7px 16px;
  border-radius:999px;font-size:13.5px;font-weight:800;color:#7C4A03;white-space:nowrap;
  background:linear-gradient(135deg,#FEF3C7 0%,#FDE68A 55%,#FBBF24 100%);
  border:1px solid #FCD34D;
  box-shadow:var(--shadow-s);
  transition:.22s;
}
.nav-vip:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(245,158,11,.4)}
.nav-vip .nv-crown{font-size:14px;line-height:1}
.nav-vip .ui-ic{width:14px;height:14px}
@media (max-width:680px){ .nav-vip{padding:6px 12px;font-size:12.5px} }
@media (max-width:480px){ .nav-vip .nv-label{display:none} }

/* ---- 作品专区 hero：浅色极光 ---- */
.gallery-hero{
  position:relative;color:var(--ink);padding:128px 0 54px;overflow:hidden;
  background:
    radial-gradient(720px 380px at 85% 0%,rgba(6,182,212,.13),transparent 62%),
    radial-gradient(560px 360px at 0% 40%,rgba(56,189,248,.1),transparent 60%),
    linear-gradient(180deg,#F8FCFF 0%,#EDF6FE 100%);
  border-bottom:1px solid var(--line);
}
.gallery-hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(6,182,212,.16),transparent 65%);pointer-events:none;
}
.gallery-hero .wrap{position:relative;z-index:1}
.gallery-hero h1{font-size:clamp(27px,4vw,42px);font-weight:900;margin:6px 0 12px;letter-spacing:-.01em;color:var(--night-1)}
.gallery-hero .lead{font-size:15.5px;color:var(--ink-soft);max-width:720px;line-height:1.95}
.gallery-hero .lead b{color:var(--lake-deep)}
.gh-points{
  display:flex;flex-wrap:wrap;gap:14px;margin:24px 0 22px;
}
.ghp-item{
  background:rgba(255,255,255,.85);border:1px solid var(--line);
  border-radius:var(--r-m);padding:14px 20px;display:flex;flex-direction:column;gap:5px;
  font-size:13.5px;color:var(--ink-soft);backdrop-filter:blur(6px);box-shadow:var(--shadow-s);
}
.ghp-item:first-child{flex-direction:row;align-items:baseline;gap:10px;background:linear-gradient(135deg,#FEF3C7,#FFFBEB);border-color:#FCD34D}
.ghp-num{font-size:34px;font-weight:900;line-height:1;background:linear-gradient(135deg,#0E7490,#0EA5E9);-webkit-background-clip:text;background-clip:text;color:transparent;font-family:var(--mono)}
.ghp-label{font-size:13px;font-weight:700;color:#B45309}
.ghp-item b{color:var(--lake-deep);font-weight:900}
.ghp-rules{flex-basis:100%;font-size:12.5px;color:var(--ink-mute);background:transparent;border:none;padding:0 2px}
.ghp-rules b{color:var(--lake-deep)}
.gh-upload{font-size:16px;padding:14px 32px}

/* ---- 分类 tabs ---- */
.gallery-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:4px 0 26px}
.gtab{
  border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:9px 20px;
  font-size:14px;font-weight:800;color:var(--ink-soft);transition:.22s;
}
.gtab:hover{border-color:var(--lake);color:var(--lake-deep);transform:translateY(-2px)}
.gtab.is-active{background:var(--grad-main);border-color:transparent;color:#fff;box-shadow:0 8px 20px rgba(6,182,212,.3)}

/* ---- 作品网格/卡片 ---- */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.gcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;
  box-shadow:var(--shadow-s);transition:.28s;display:flex;flex-direction:column;cursor:pointer;
}
.gcard:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:rgba(6,182,212,.35)}
.gc-media{position:relative;aspect-ratio:16/10;background:#0F172A;overflow:hidden}
.gc-body{padding:15px 16px 14px;display:flex;flex-direction:column;gap:7px;flex:1}
.gc-body h3{font-size:16px;font-weight:900;line-height:1.4}
.gc-desc{font-size:13px;color:var(--ink-soft);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.gc-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px;padding-top:8px;border-top:1px dashed var(--line)}
.gc-author{font-size:12px;color:var(--ink-mute);font-weight:700}
.gc-actions{display:inline-flex;align-items:center;gap:8px}
.gc-like{
  font-size:12.5px;font-weight:800;color:var(--ink-mute);background:var(--paper-2);
  border-radius:999px;padding:4px 12px;transition:.2s;
}
.gc-like:hover{background:rgba(236,72,153,.12);color:var(--pink)}
.gc-like.is-liked{background:rgba(236,72,153,.14);color:var(--pink)}
.gc-del{font-size:12px;color:var(--ink-mute);padding:3px 8px;border-radius:8px}
.gc-del:hover{color:var(--red);background:rgba(239,68,68,.1)}
.gc-badge{
  position:absolute;top:10px;left:10px;z-index:2;font-size:11.5px;font-weight:800;
  padding:4px 11px;border-radius:999px;color:#fff;backdrop-filter:blur(4px);
}
.gc-pick-badge{background:linear-gradient(135deg,#F59E0B,#EF4444);box-shadow:0 4px 12px rgba(245,158,11,.4)}
.gc-mine-badge{background:rgba(15,23,42,.72);border:1px solid rgba(255,255,255,.3)}
.gc-code-lines{
  margin:0;height:100%;padding:14px 14px 30px;overflow:hidden;
  font-family:var(--mono);font-size:11.5px;line-height:1.75;color:#A7F3D0;white-space:pre-wrap;word-break:break-all;
}
.gcl-no{display:inline-block;width:2.2em;color:rgba(167,243,208,.35);user-select:none}
.gc-code-lang{
  position:absolute;right:10px;bottom:10px;z-index:2;font-size:11px;font-weight:800;
  color:#fff;background:rgba(124,58,237,.85);padding:3px 10px;border-radius:999px;
}
.gc-cover{
  position:absolute;inset:0;display:grid;place-items:center;font-size:58px;
}
.gc-cover-video{font-size:0}
.gcp-emoji{font-size:58px;filter:drop-shadow(0 8px 16px rgba(0,0,0,.4))}
.gcp-play{
  position:absolute;width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.92);color:#7C3AED;font-size:18px;padding-left:3px;
  box-shadow:0 10px 26px rgba(0,0,0,.35);
}
.gc-img-slot,.gc-vid-slot{position:absolute;inset:0;display:grid;place-items:center;background:#0F172A}
.gc-img-slot img{width:100%;height:100%;object-fit:cover}
.gc-vid-slot video{width:100%;height:100%;object-fit:cover}
.gc-img-loading{color:rgba(226,238,248,.6);font-size:13px}
.g-empty{
  grid-column:1/-1;text-align:center;padding:64px 20px;background:#fff;
  border:1.5px dashed var(--line);border-radius:var(--r-l);
}
.ge-emoji{font-size:56px;margin-bottom:10px}
.g-empty p{color:var(--ink-soft);font-weight:700;margin-bottom:18px}
.gallery-local-note{
  margin-top:20px;font-size:13px;color:#92400E;background:#FEF3C7;
  border:1px solid #FDE68A;border-radius:var(--r-s);padding:11px 16px;line-height:1.7;
}
.gallery-faq{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);padding:28px 30px;box-shadow:var(--shadow-s)}
.gallery-faq ul{display:flex;flex-direction:column;gap:13px}
.gallery-faq li{font-size:13.5px;color:var(--ink-soft);line-height:1.85;padding-left:24px;position:relative}
.gallery-faq li::before{content:'✦';position:absolute;left:0;top:0;color:#7C3AED}
.gallery-faq b{color:var(--ink)}

/* ---- 上传弹窗（仅作品社区两个遮罩用 hidden 属性切换，勿用通用 .modal-mask 选择器，
   否则会覆盖公告弹窗 #annMask、课程播放器 #playerMask 的 .show 显隐机制） ---- */
#upMask[hidden],#viewMask[hidden]{display:none!important}
#upMask:not([hidden]),#viewMask:not([hidden]){display:grid;animation:fadein .22s}
.up-modal{
  position:relative;width:min(600px,100%);max-height:88vh;overflow-y:auto;
  background:#fff;border-radius:var(--r-l);padding:28px 30px 26px;box-shadow:var(--shadow-l);
}
.up-close{
  position:absolute;top:14px;right:16px;width:36px;height:36px;border-radius:50%;
  font-size:22px;color:var(--ink-mute);background:var(--paper-2);transition:.2s;
}
.up-close:hover{background:var(--paper-3);color:var(--ink)}
.up-modal>h3{font-size:20px;font-weight:900;margin-bottom:16px}
.up-types{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}
.uptype{
  border:1.5px solid var(--line);border-radius:var(--r-s);padding:11px 8px;font-size:13.5px;font-weight:800;
  color:var(--ink-soft);background:var(--paper-2);transition:.2s;display:flex;flex-direction:column;align-items:center;gap:3px;
}
.uptype em{font-style:normal;font-size:11.5px;color:var(--gold);font-weight:900}
.uptype.is-active{border-color:#7C3AED;background:rgba(124,58,237,.08);color:#6D28D9}
.uptype.is-active em{color:#DB2777}
.up-pane{animation:fadein .2s}
.up-filebtn{
  display:inline-flex;align-items:center;gap:6px;color:var(--lake-deep);
  border-bottom:1px dashed var(--lake);font-weight:800;cursor:pointer;font-size:13.5px;
}
.up-filebtn.up-drop{
  display:flex;justify-content:center;align-items:center;width:100%;padding:26px;
  border:1.5px dashed var(--violet);border-radius:var(--r-m);background:rgba(124,58,237,.05);
  color:#6D28D9;font-size:14.5px;
}
.up-filebtn.up-drop:hover{background:rgba(124,58,237,.1)}
#upCode{font-family:var(--mono);font-size:12.5px;line-height:1.7}
.up-preview{position:relative;margin-top:10px;border-radius:var(--r-s);overflow:hidden;border:1px solid var(--line)}
.up-preview img{width:100%;max-height:280px;object-fit:contain;background:#0F172A;display:block}
.up-preview video{width:100%;max-height:260px;background:#000;display:block}
.up-rm{
  position:absolute;top:8px;right:8px;background:rgba(15,23,42,.78);color:#fff;
  font-size:12px;font-weight:700;padding:6px 12px;border-radius:999px;
}
.btn-block{display:flex;width:100%;justify-content:center;margin-top:6px}

/* ---- 作品详情弹窗 ---- */
.view-modal{
  position:relative;width:min(760px,100%);max-height:90vh;overflow-y:auto;
  background:#fff;border-radius:var(--r-l);box-shadow:var(--shadow-l);
}
.view-media{background:#0F172A}
.view-code{
  margin:0;max-height:46vh;overflow:auto;padding:20px 22px;
  font-family:var(--mono);font-size:12.5px;line-height:1.8;color:#A7F3D0;white-space:pre-wrap;word-break:break-word;
}
.view-cover{aspect-ratio:16/9;display:grid;place-items:center;font-size:80px;color:rgba(255,255,255,.9)}
.view-cover p{font-size:13px;color:rgba(226,238,248,.6);grid-column:1}
.view-img{display:block;width:100%;max-height:56vh;object-fit:contain;background:#0F172A}
.view-video{display:block;width:100%;max-height:56vh;background:#000}
.view-loading{padding:60px;text-align:center;color:rgba(226,238,248,.6);font-size:14px}
.view-info{padding:22px 26px 26px;position:relative}
.view-info .up-close{top:14px;right:16px;background:var(--paper-2)}
.gc-type-tag{display:inline-block;font-size:12px;font-weight:900;color:#6D28D9;background:rgba(124,58,237,.1);padding:4px 12px;border-radius:999px;margin-bottom:10px}
.view-info h3{font-size:21px;font-weight:900;margin-bottom:8px}
.view-desc{font-size:14px;color:var(--ink-soft);line-height:1.9;white-space:pre-wrap}
.view-author{margin:12px 0 14px;font-size:13px;color:var(--ink-mute);font-weight:700}

/* ---- toast ---- */
.g-toast{
  position:fixed;left:50%;bottom:42px;transform:translate(-50%,24px);z-index:6000;
  background:rgba(15,23,42,.94);color:#fff;font-size:14px;font-weight:700;
  padding:13px 24px;border-radius:999px;box-shadow:var(--shadow-l);
  opacity:0;pointer-events:none;transition:.28s;max-width:90vw;text-align:center;
}
.g-toast.show{opacity:1;transform:translate(-50%,0)}

/* ---- AI 深度思考开关（小球 + 体验舱共用） ---- */
.ai-deep{
  display:flex;align-items:center;gap:8px;margin:10px 0 8px;padding:9px 13px;
  background:linear-gradient(135deg,rgba(124,58,237,.08),rgba(236,72,153,.06));
  border:1px solid rgba(124,58,237,.22);border-radius:var(--r-s);cursor:pointer;
  font-size:13.5px;font-weight:800;color:var(--ink);user-select:none;
}
.ai-deep input{width:16px;height:16px;accent-color:#7C3AED;cursor:pointer}
.aid-icon{font-size:16px}
.ai-deep em{
  margin-left:auto;font-style:normal;font-size:11.5px;font-weight:800;
  color:var(--violet);background:rgba(124,58,237,.1);padding:3px 10px;border-radius:999px;
}
.ai-deep em.free{color:#047857;background:rgba(34,197,94,.12)}
.ai-deep em.lack{color:var(--red);background:rgba(239,68,68,.1)}
.msg.user-deep{border-color:rgba(124,58,237,.4);background:rgba(124,58,237,.06)}
.msg.user-deep::before{content:"🧠 "}

/* AI 回复富文本与主动追问 */
.ai-log .ai-md{white-space:normal;word-break:break-word}
.ai-log .ai-md strong{color:var(--lake-deep);font-weight:800}
.ai-log .msg.user strong{color:#fff}
.ai-follow{
  display:block;width:100%;margin-top:9px;padding:8px 12px;text-align:left;
  border:1px dashed #7dd3fc;background:#f0f9ff;color:#0369a1;border-radius:10px;
  font-size:12.5px;font-weight:600;line-height:1.5;transition:.15s;cursor:pointer;
}
.ai-follow:hover{background:#e0f2fe;border-style:solid;border-color:#0ea5e9}
.ai-follow::after{content:" →";font-weight:800}
.deep-typing{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.dt-label{font-size:12.5px;font-weight:800;color:#7C3AED}
.deep-blocked{
  background:linear-gradient(135deg,rgba(124,58,237,.08),rgba(236,72,153,.06))!important;
  border:1px solid rgba(124,58,237,.25)!important;font-size:13.5px;line-height:1.85;
}
.db-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.deep-blocked .dbtn{padding:8px 16px;font-size:13px;border-radius:999px}

/* ---- vip：积分抵扣卡 ---- */
.points-redeem{
  margin:6px 0 22px;background:#fff;border:1.5px solid rgba(245,158,11,.45);
  border-radius:var(--r-m);padding:16px 20px;box-shadow:var(--shadow-s);
}
.pr-head{display:flex;align-items:center;gap:10px;cursor:pointer;font-size:15px;font-weight:900}
.pr-head input{width:17px;height:17px;accent-color:#F59E0B;cursor:pointer}
.pr-title{flex:1}
.pr-bal{font-size:13.5px;color:var(--ink-soft);font-weight:700}
.pr-bal b{color:#B45309;font-size:16px;font-weight:900}
.pr-body{margin-top:14px;padding-top:14px;border-top:1px dashed #FDE68A}
.pr-line{font-size:13px;color:var(--ink-soft);margin-bottom:12px}
.pr-line b{color:#B45309}
#prRange{width:100%;accent-color:#F59E0B;cursor:pointer}
.pr-sum{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:10px;font-size:13.5px;color:var(--ink-soft)}
.pr-sum b{color:var(--ink);font-size:15px}
.pr-sum .pr-pay{color:#B91C1C!important;font-size:18px}
.pr-sum .dbtn{margin-left:auto;padding:7px 16px;font-size:12.5px;border-radius:999px}
.pr-empty{margin-top:12px;font-size:13px;color:var(--ink-mute);display:none}
.pr-empty a{color:var(--lake-deep);font-weight:800}
/* 99 单档套餐布局 */
.plan-grid.plan-grid-single{grid-template-columns:minmax(280px,420px);justify-content:center}
.pp-unit{font-size:14px;font-weight:700;color:var(--ink-mute)}

/* ---- my 页：积分卡 ---- */
.my-points{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  padding:22px 24px;box-shadow:var(--shadow-s);margin-bottom:18px;
}
.mp-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.mp-ic{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;font-size:26px;
  background:linear-gradient(135deg,#F59E0B,#EC4899);box-shadow:0 8px 20px rgba(245,158,11,.3);
}
.mp-balance{display:flex;flex-direction:column}
.mp-balance b{font-size:30px;font-weight:900;line-height:1.1;background:linear-gradient(135deg,#D97706,#DB2777);-webkit-background-clip:text;background-clip:text;color:transparent}
.mp-balance span{font-size:12.5px;color:var(--ink-mute);font-weight:700}
.mp-actions{margin-left:auto;display:flex;gap:10px;flex-wrap:wrap}
.mp-rules{
  display:flex;flex-wrap:wrap;gap:8px 18px;margin:16px 0 4px;padding:12px 16px;
  background:var(--paper-2);border-radius:var(--r-s);font-size:12.5px;color:var(--ink-soft);
}
.mp-rules b{color:#B45309}
.mp-log-wrap{margin-top:14px}
.mp-log-wrap h4{font-size:14px;font-weight:900;margin-bottom:8px}
.mp-log{display:flex;flex-direction:column}
.mp-log li{
  display:flex;align-items:center;gap:12px;padding:9px 2px;font-size:13px;
  border-bottom:1px dashed var(--line);
}
.mpl-reason{flex:1;color:var(--ink-soft);font-weight:600;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mpl-time{font-size:11.5px;color:var(--ink-mute);white-space:nowrap}
.mp-log b{font-size:13.5px;font-weight:900;min-width:52px;text-align:right}
.mp-log b.plus{color:#059669}
.mp-log b.minus{color:#DC2626}
.mp-empty{font-size:13px;color:var(--ink-mute);padding:14px 4px}

/* ---- 首页：作品社区专区卡 ---- */
.zone-level-gallery{background:linear-gradient(135deg,#7C3AED,#EC4899)!important;color:#fff!important}
.zone-prog-gallery{background:linear-gradient(90deg,rgba(124,58,237,.14),rgba(236,72,153,.08))}
.zone-prog-gallery em{color:#6D28D9!important;font-weight:800}
.zone-card.zone-gallery{border-color:rgba(124,58,237,.35)}

/* ---- 响应式 ---- */
@media (max-width:900px){
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .gallery-hero{padding:108px 0 40px}
  .gallery-grid{grid-template-columns:1fr}
  .ghp-item{flex:1 1 100%}
  .up-modal{padding:22px 18px}
  .up-types{grid-template-columns:1fr;gap:8px}
  .mp-actions{margin-left:0;width:100%}
  .nav-points .np-label{display:none}
  .nav-points{padding:6px 11px}
  .gallery-faq{padding:22px 18px}
}

/* 导航 8 个入口均带线性图标：≤1380px 收起为汉堡下拉，防止挤压竖排 */
@media (min-width:681px) and (max-width:1380px){
  .nav-links{
    position:fixed;top:64px;left:14px;right:14px;flex-direction:column;background:#fff;border-radius:18px;
    padding:12px;box-shadow:var(--shadow-l);gap:2px;display:none;z-index:1000;
    border:1px solid var(--line);
  }
  .nav-links.open{display:flex}
  .nav-links a{color:var(--ink-soft)!important;padding:12px 16px;min-height:44px;display:flex;align-items:center}
  .nav-links a .ui-ic{width:18px;height:18px}
  .nav-toggle{display:flex}
  .brand small{display:none}
}
@media (min-width:1381px){
  .nav-links a{padding:8px 11px}
}

/* ============================================================
   zone-demos 扩展专区互动实验台样式（深色 .demo-stage 内）
   ============================================================ */
.demo-stage canvas{display:block;border-radius:10px;background:rgba(255,255,255,.03);margin:6px 0;max-width:100%}
.zd-tip{
  margin-top:16px;padding:11px 14px;border-radius:10px;font-size:13px;line-height:1.75;
  background:rgba(103,232,249,.08);border:1px solid rgba(103,232,249,.22);color:#BAE6FD
}
.zd-soft{font-size:13px;color:rgba(226,238,248,.62);line-height:1.7;margin-top:8px}
.zd-warn{
  margin-top:12px;padding:10px 14px;border-radius:10px;font-size:12.5px;line-height:1.7;
  background:rgba(248,113,113,.1);border:1px solid rgba(248,113,113,.3);color:#FECACA
}
.zd-bar{height:8px;border-radius:99px;background:rgba(255,255,255,.1);overflow:hidden;flex:1;min-width:70px}
.zd-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#06B6D4,#8B5CF6);transition:width .35s}
.zd-slider{margin:10px 0 4px}
.zd-slider label{display:flex;justify-content:space-between;font-size:13px;font-weight:700;color:#E2EEF8;margin-bottom:5px}
.zd-slider label b{color:#FDE047;font-family:var(--mono)}
.zd-slider input[type=range]{width:100%;accent-color:#06B6D4;height:26px}
.zd-seg{display:flex;gap:8px;margin:12px 0;flex-wrap:wrap}
.zd-seg button{
  flex:1;min-width:90px;padding:9px 8px;border-radius:10px;font-size:12.5px;font-weight:700;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);color:#CBD5E1;transition:.2s
}
.zd-seg button.on{background:linear-gradient(135deg,#0891B2,#7C3AED);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(8,145,178,.35)}
.zd-chips{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 10px}
.zd-chip{
  padding:7px 14px;border-radius:999px;font-size:12.5px;font-weight:700;cursor:pointer;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);color:#CBD5E1;transition:.2s
}
.zd-chip:hover{border-color:#67E8F9}
.zd-chip.on{background:rgba(103,232,249,.18);border-color:#67E8F9;color:#A5F3FC}
.zd-inp,.zd-sel,.zd-ta{
  width:100%;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);border-radius:10px;
  color:#E2EEF8;padding:10px 13px;font-size:13.5px;outline:none;font-family:inherit
}
.zd-inp:focus,.zd-sel:focus,.zd-ta:focus{border-color:#67E8F9;background:rgba(255,255,255,.1)}
.zd-ta{resize:vertical;line-height:1.7;margin:8px 0}
.zd-inp::placeholder,.zd-ta::placeholder{color:rgba(226,238,248,.35)}
.zd-legend{display:flex;gap:16px;flex-wrap:wrap;align-items:center;font-size:12.5px;color:rgba(226,238,248,.75);margin:10px 0}
.zd-legend span{display:inline-flex;align-items:center;gap:6px}
.zd-legend i{width:10px;height:10px;border-radius:50%;display:inline-block}
.zd-vote{margin-left:auto;font-weight:800;color:#FDE047}
.zd-acc{margin-top:10px;font-size:13px;line-height:1.8;color:#A5F3FC}
.zd-grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pm-label{display:block;font-size:13px;font-weight:800;color:#BAE6FD;margin:12px 0 4px}

/* KNN */
.knn-vote{font-size:13.5px;font-weight:800}

/* 检测台 */
.dc-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.dc-row{display:flex;align-items:center;gap:10px;font-size:13px;background:rgba(255,255,255,.05);padding:8px 12px;border-radius:10px}
.dc-row b{min-width:64px}
.dc-row em{font-style:normal;font-weight:800;font-family:var(--mono);min-width:42px;text-align:right}
.dc-dot{width:10px;height:10px;border-radius:50%;flex:none}

/* 语音 */
.sp-wave{display:flex;align-items:center;justify-content:center;gap:5px;height:74px;background:rgba(255,255,255,.04);border-radius:12px;margin-bottom:12px}
.sp-wave i{width:4px;height:18px;border-radius:3px;background:linear-gradient(180deg,#67E8F9,#3B82F6);animation:zdwave 1s ease-in-out infinite;animation-play-state:paused}
.sp-wave.live i{animation-play-state:running}
@keyframes zdwave{0%,100%{height:12px}50%{height:46px}}
.sp-text{min-height:64px;background:rgba(255,255,255,.06);border-radius:10px;padding:12px 14px;font-size:14px;line-height:1.8;color:#E2EEF8}
.sp-voicegrid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0}
.sp-vcard{background:rgba(255,255,255,.05);border-radius:12px;padding:12px;text-align:center}
.sp-vcard b{display:block;margin-bottom:6px}
.sp-vcard canvas{width:100%;height:60px;margin:0}
.sp-vcard span{font-size:12px;color:rgba(226,238,248,.6)}
.sp-cmp{margin-top:12px;font-size:13.5px;line-height:2;color:#E2EEF8}

/* CLIP */
.cm-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.cm-card{background:rgba(255,255,255,.05);border-radius:12px;padding:12px}
.cm-card>b{font-size:13.5px}
.cm-img{font-size:40px;text-align:center;margin-bottom:6px}
.cm-prob{display:flex;align-items:center;gap:8px;font-size:11.5px;margin-top:7px;color:rgba(226,238,248,.7)}
.cm-prob span{min-width:72px}
.cm-prob b{font-family:var(--mono);font-size:11.5px;min-width:34px;text-align:right}
.cm-row{display:flex;gap:10px;margin-top:12px}
.cm-row .zd-inp{flex:1}
.cm-best{margin-top:12px;text-align:center;font-size:14px;font-weight:800;color:#FDE047;background:rgba(253,224,71,.08);border:1px solid rgba(253,224,71,.3);padding:10px;border-radius:10px}

/* Q学习 */
.qm-wrap{display:grid;grid-template-columns:1fr 240px;gap:16px;align-items:center}

/* SLAM */
.sl-controls{display:grid;grid-template-columns:repeat(3,56px);gap:8px;justify-content:center;margin:12px 0}
.sl-controls button{
  height:48px;border-radius:12px;font-size:18px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.18);color:#fff;font-weight:800
}
.sl-controls button:active{background:rgba(103,232,249,.3)}
.sl-info{text-align:center;font-size:13px;color:rgba(226,238,248,.75);margin-top:8px}

/* 自动驾驶 */
.sd-layers{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0;font-size:12.5px;color:#CBD5E1}
.sd-layers label{display:inline-flex;align-items:center;gap:6px}
.sd-layers input{accent-color:#06B6D4;width:15px;height:15px}
.sd-table{margin-top:12px}
.sd-trow{display:grid;grid-template-columns:1.4fr .8fr 1fr 1fr;gap:8px;padding:7px 12px;font-size:12.5px;border-bottom:1px dashed rgba(255,255,255,.1)}
.sd-head{background:rgba(255,255,255,.08);border-radius:8px;font-weight:800;color:#BAE6FD;border-bottom:none}
.sd-brake{margin-top:10px;background:rgba(248,113,113,.14);border:1px solid rgba(248,113,113,.4);color:#FECACA;padding:10px 14px;border-radius:10px;font-size:13px;font-weight:700;animation:zdblink .9s infinite}
@keyframes zdblink{50%{opacity:.55}}

/* 云边对比 */
.ev-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.ev-col{background:rgba(255,255,255,.05);border-radius:12px;padding:14px}
.ev-col b{display:block;font-size:14px;margin-bottom:10px}
.ev-line{display:flex;align-items:center;gap:8px;font-size:12.5px;color:rgba(226,238,248,.7);min-height:22px}
.ev-dot{width:9px;height:9px;border-radius:50%;background:#475569;flex:none}
.ev-dot.blink{background:#FDE047;box-shadow:0 0 10px #FDE047;animation:pulse .7s infinite}
.ev-metrics{margin-top:10px;font-size:12.5px;line-height:1.8;color:rgba(226,238,248,.7)}
.ev-local{border:1px solid rgba(52,211,153,.3)}
.ev-lamp{display:flex;align-items:center;gap:12px;margin:14px 0;font-size:13.5px;font-weight:700}
.ev-bulb{font-size:30px;filter:grayscale(.3)}
.ev-bulb.thinking{animation:pulse .3s infinite}
.ev-log{margin-top:10px;font-size:12.5px;color:rgba(226,238,248,.6);line-height:1.9}

/* 数据清洗 */
.dw-table{overflow-x:auto;border-radius:10px}
.dw-table table{width:100%;border-collapse:collapse;font-size:12.5px;min-width:380px}
.dw-table th,.dw-table td{padding:7px 10px;text-align:center;border-bottom:1px solid rgba(255,255,255,.08)}
.dw-table th{background:rgba(255,255,255,.08);color:#BAE6FD;font-weight:800}
.dw-table td.miss{color:#FBBF24;font-weight:800}
.dw-table td.outlier{color:#F87171;font-weight:800}
.dw-table tr.gone{opacity:.3;text-decoration:line-through}
.dw-table em{font-style:normal;font-size:11px;padding:2px 7px;border-radius:99px;margin:0 2px;white-space:nowrap}
.tag-dup{background:rgba(167,139,250,.2);color:#DDD6FE}
.tag-miss{background:rgba(251,191,36,.2);color:#FDE68A}
.tag-out{background:rgba(248,113,113,.2);color:#FECACA}
.tag-gone{background:rgba(148,163,184,.2);color:#CBD5E1}

/* 绘画配方 */
.pm-preview{
  position:relative;margin-top:14px;border-radius:14px;height:220px;overflow:hidden;
  display:grid;place-items:center;border:1px solid rgba(255,255,255,.15)
}
.pm-emoji{line-height:1;filter:drop-shadow(0 8px 18px rgba(0,0,0,.4));position:relative;z-index:2}
.pm-sub{position:absolute;right:16px;bottom:14px;opacity:.85}
.pm-seed{position:absolute;left:12px;top:10px;font-size:11px;font-family:var(--mono);color:rgba(255,255,255,.75);background:rgba(0,0,0,.35);padding:3px 9px;border-radius:99px}
.pm-loading{position:relative;z-index:2;font-size:13px;color:#fff;font-weight:700;margin-top:14px}
.pm-spin{
  width:34px;height:34px;border-radius:50%;border:3px solid rgba(255,255,255,.25);
  border-top-color:#67E8F9;animation:zdspin .8s linear infinite
}
.pm-spin.big{width:52px;height:52px;border-width:4px}
@keyframes zdspin{to{transform:rotate(360deg)}}
.pm-prompt{margin-top:12px;background:rgba(0,0,0,.3);border-radius:10px;padding:11px 14px;font-size:12.5px;line-height:1.8;color:#A5F3FC}

/* 音乐 */
.mp-pad{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:10px 0}
.mp-key{
  background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:14px 4px;color:#fff;
  display:flex;flex-direction:column;align-items:center;gap:4px;transition:transform .08s
}
.mp-key b{font-size:15px}
.mp-key span{font-size:10px;color:rgba(226,238,248,.55);font-family:var(--mono)}
.mp-key.hit{background:linear-gradient(180deg,#06B6D4,#0891B2);transform:scale(.93)}
.mp-seq{margin-top:12px;min-height:40px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.mp-note{
  display:inline-block;padding:5px 11px;border-radius:8px;font-size:12.5px;font-weight:800;
  background:rgba(255,255,255,.08);color:#BAE6FD
}
.mp-note.active{background:#FDE047;color:#1F2937;transform:scale(1.12)}

/* 数字人 */
.av-wave{display:flex;align-items:center;justify-content:center;gap:5px;height:44px;margin-top:10px}
.av-wave i{width:4px;height:10px;border-radius:3px;background:linear-gradient(180deg,#F472B6,#8B5CF6);animation:zdwave .9s ease-in-out infinite;animation-play-state:paused}

/* 流水线（创作/案例共用） */
.cr-pipeline{display:flex;align-items:stretch;gap:6px;margin:14px 0;flex-wrap:wrap}
.cr-node{
  flex:1;min-width:120px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:10px;padding:10px;font-size:12px;line-height:1.5;transition:.25s
}
.cr-node span{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:rgba(255,255,255,.15);font-weight:800;margin-bottom:5px}
.cr-node b{display:block;font-weight:700;color:#E2EEF8}
.cr-node i{font-style:normal;font-size:12px}
.cr-node.active{border-color:#67E8F9;background:rgba(103,232,249,.12);box-shadow:0 0 16px rgba(103,232,249,.25)}
.cr-node.done{border-color:#34D399;background:rgba(52,211,153,.1)}
.cr-node.done span{background:#34D399;color:#06281F}
.cr-arrow{display:flex;align-items:center;color:#67E8F9;font-size:15px}
.cr-out,.cj-out{margin-top:12px;min-height:60px;background:rgba(0,0,0,.25);border-radius:10px;padding:12px 14px}
.cr-line{font-size:13px;line-height:1.9;color:#E2EEF8}
.cr-line.first{color:#FDE047;font-weight:800}
.cr-done{margin-top:10px;font-size:13px;font-weight:700;color:#34D399}
.cj-case{background:rgba(251,191,36,.09);border:1px solid rgba(251,191,36,.3);border-radius:10px;padding:12px 14px;font-size:13.5px;line-height:1.8;color:#FDE68A}
.cj-line{font-size:13px;line-height:1.9;color:#E2EEF8}
.cj-verdict{margin-top:10px;font-size:13.5px;font-weight:800;line-height:1.8;color:#A7F3D0;background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.3);border-radius:10px;padding:10px 14px}

/* 行为树 */
.bh-log{margin-top:10px;font-size:12.5px;line-height:1.9;color:rgba(226,238,248,.7)}
.bh-log div{display:flex;gap:8px;align-items:flex-start}
.bh-log i{width:8px;height:8px;border-radius:50%;margin-top:6px;flex:none}

/* 苏格拉底 */
.so-problem{background:rgba(255,255,255,.06);border-radius:10px;padding:12px 14px;font-size:14px;font-weight:700;line-height:1.8}
.so-body{margin-top:10px;max-height:330px;overflow-y:auto;padding-right:4px}
.so-chat{display:flex;flex-direction:column;gap:10px}
.so-msg{max-width:88%;padding:10px 14px;border-radius:13px;font-size:13.5px;line-height:1.8}
.so-msg.bot{background:rgba(255,255,255,.08);border-bottom-left-radius:4px;align-self:flex-start}
.so-msg.user{background:linear-gradient(135deg,#0891B2,#0E7490);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}
.so-msg.ok{background:rgba(52,211,153,.15);color:#A7F3D0}
.so-msg.retry{background:rgba(251,191,36,.12);color:#FDE68A}
.so-msg.warn{background:rgba(248,113,113,.12);color:#FECACA}
.so-msg.done{background:rgba(103,232,249,.14);color:#A5F3FC;font-weight:700}
.so-opts{display:flex;gap:8px;flex-wrap:wrap;margin-top:9px}
.so-opts button{
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer;
  background:rgba(103,232,249,.14);border:1px solid rgba(103,232,249,.4);color:#CFFAFE
}
.so-opts button.right{background:#34D399;border-color:#34D399;color:#06281F}
.so-opts button.wrong{background:#F87171;border-color:#F87171;color:#fff}
.so-opts button:disabled{opacity:.65;cursor:default}

/* 自适应学习 */
.ad-card{margin-top:12px}
.ad-level{font-size:12px;font-weight:800;color:#67E8F9;letter-spacing:.08em}
.ad-q{font-size:15px;font-weight:700;margin:8px 0 12px;line-height:1.7}
.ad-opts{display:flex;gap:10px;flex-wrap:wrap}
.ad-opts button{
  flex:1;min-width:80px;padding:12px;border-radius:12px;font-size:15px;font-weight:800;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#fff
}
.ad-opts button.right{background:#34D399;color:#06281F;border-color:#34D399}
.ad-opts button.wrong{background:#F87171;border-color:#F87171}
.ad-opts button:disabled{opacity:.7}
.ad-fb{margin-top:10px;font-size:13px;font-weight:700;padding:9px 13px;border-radius:10px}
.ad-fb.ok{background:rgba(52,211,153,.12);color:#A7F3D0}
.ad-fb.no{background:rgba(248,113,113,.12);color:#FECACA}
.ad-done{background:rgba(253,224,71,.09);border:1px solid rgba(253,224,71,.3);border-radius:12px;padding:16px;font-size:14px;line-height:2;color:#FDE68A;text-align:center}

/* 行程规划 */
.tp-out{margin-top:14px}
.tp-summary{font-size:13px;line-height:1.8;color:#BAE6FD;background:rgba(103,232,249,.08);border-radius:10px;padding:10px 14px;margin-bottom:12px}
.tp-day{background:rgba(255,255,255,.05);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.tp-day>b{display:block;color:#FDE047;font-size:13.5px;margin-bottom:8px}
.tp-item{display:flex;align-items:center;gap:10px;padding:7px 0;border-bottom:1px dashed rgba(255,255,255,.08)}
.tp-item:last-child{border-bottom:none}
.tp-no{width:22px;height:22px;border-radius:50%;background:rgba(103,232,249,.2);color:#67E8F9;display:grid;place-items:center;font-size:12px;font-weight:800;flex:none}
.tp-e{font-size:22px}
.tp-item b{display:block;font-size:13.5px}
.tp-item em{font-style:normal;font-size:11.5px;color:rgba(226,238,248,.55)}

/* 竞赛雷达 */
.pr-grid{display:grid;grid-template-columns:300px 1fr;gap:18px;align-items:start}
.pr-num{font-size:40px;font-weight:900;line-height:1;color:#67E8F9;font-family:var(--mono)}
.pr-grade{font-size:14px;font-weight:800;color:#FDE047;margin:4px 0 8px}
.pr-ethics{margin-top:12px;font-size:12.5px;line-height:1.8;padding:10px 13px;border-radius:10px;background:rgba(255,255,255,.05)}

/* ---- zone-demos 移动端适配 ---- */
@media (max-width:680px){
  .demo-stage{padding:20px 16px}
  .zd-grid2,.cm-grid,.sp-voicegrid,.ev-grid{grid-template-columns:1fr}
  .qm-wrap{grid-template-columns:1fr}
  .qm-wrap canvas:last-child{width:100%!important;height:auto!important}
  .pr-grid{grid-template-columns:1fr}
  .pr-grid canvas{margin:0 auto}
  .zd-seg button{min-width:0;padding:11px 6px;font-size:12px;min-height:40px}
  .zd-chip{min-height:40px;display:inline-flex;align-items:center}
  .demo-stage .dbtn{min-height:44px}
  .mp-pad{gap:5px}
  .mp-key{padding:14px 2px}
  .cr-node{min-width:46%;flex:1 1 46%}
  .cr-arrow{display:none}
  .sl-controls{grid-template-columns:repeat(3,60px)}
  .sl-controls button{height:52px}
  .sd-trow{grid-template-columns:1.3fr .7fr .8fr .9fr;font-size:11.5px;padding:7px 6px}
  .dc-row{flex-wrap:wrap}
  .dc-row .zd-bar{order:3;flex-basis:100%}
  .so-msg{max-width:94%}
  .so-opts button{min-height:40px}
  .tp-item em{font-size:11px}
}

/* ============================================================
   我的学习中心 · 每日打卡 / 徽章墙 / 学习榜（浅色主题）
   ============================================================ */
.my-sec-title{margin:22px 0 12px;font-size:17px;color:var(--lake-deep)}
.ci-card{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:18px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-l);padding:20px}
.ci-left{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;justify-content:flex-start}
.ci-flame{font-size:44px;line-height:1.1}
.ci-streak b{font-size:34px;font-weight:900;color:#ea580c;line-height:1.1}
.ci-streak span{display:block;font-size:13px;color:var(--ink-mute)}
.ci-total{font-size:12.5px;color:var(--ink-mute);margin:2px 0 8px}
.ci-total b{color:var(--lake-deep)}
.ci-btn{min-width:190px;min-height:46px;font-size:15px;font-weight:700}
.ci-hint{font-size:11.5px;color:var(--ink-mute);line-height:1.7;margin-top:4px;max-width:260px}
.ci-cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.ci-cal-head b{font-size:15px;color:var(--lake-deep)}
.ci-nav{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--lake-deep);font-size:18px;line-height:1;cursor:pointer;transition:.15s}
.ci-nav:hover{background:#e0f2fe;border-color:#7dd3fc}
.ci-weekrow,.ci-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.ci-weekrow span{text-align:center;font-size:12px;color:var(--ink-mute);padding:2px 0}
.ci-cell{position:relative;aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--ink);border-radius:9px;background:#fff;border:1px solid var(--line);user-select:none}
.ci-cell.empty{background:none;border:none}
.ci-cell.future{color:#cbd5e1;background:#fafafa}
.ci-cell.learned{background:#f0f9ff;border-color:#bae6fd}
.ci-cell.learned em{position:absolute;right:5px;top:5px;width:6px;height:6px;border-radius:50%;background:#38bdf8}
.ci-cell.checked{background:linear-gradient(135deg,#fb923c,#f97316);border-color:#f97316;color:#fff;font-weight:700;flex-direction:column;gap:0}
.ci-cell.checked i{font-style:normal;font-size:11px;line-height:1}
.ci-cell.checked b{font-size:12px;font-weight:700;line-height:1.2}
.ci-cell.today:not(.checked){box-shadow:0 0 0 2px #0ea5e9 inset}
.ci-legend{display:flex;gap:16px;justify-content:center;margin-top:10px;font-size:11.5px;color:var(--ink-mute)}
.ci-legend i{display:inline-block;width:12px;height:12px;border-radius:4px;vertical-align:-2px;margin-right:4px}
.ci-legend .lg-check{background:linear-gradient(135deg,#fb923c,#f97316)}
.ci-legend .lg-learn{background:#bae6fd}
.ci-legend .lg-today{background:#fff;box-shadow:0 0 0 2px #0ea5e9 inset}

/* 徽章墙 */
.bw-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.bw-count{font-size:13px;color:var(--ink-mute);white-space:nowrap}
.bw-count b{color:#d97706;font-size:17px}
.bw-prog{flex:1;height:9px;border-radius:6px;background:#f1f0ed;overflow:hidden}
.bw-prog i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,#fbbf24,#f59e0b);transition:width .5s}
.bw-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(128px,1fr));gap:10px}
.bw-item{display:flex;flex-direction:column;align-items:center;text-align:center;gap:3px;padding:14px 8px;border-radius:var(--r-m);background:#fafaf9;border:1px solid #f0eeeb;filter:grayscale(.9);opacity:.55;transition:.2s}
.bw-item.got{filter:none;opacity:1;background:linear-gradient(135deg,#fffbeb,#fef3c7);border-color:#fcd34d;box-shadow:0 2px 10px rgba(245,158,11,.14)}
.bw-ic{font-size:30px;line-height:1.2}
.bw-item b{font-size:13px;color:var(--lake-deep)}
.bw-item span{font-size:11px;color:var(--ink-mute);line-height:1.4}

/* 学习榜 */
.my-leaderboard{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-l);padding:16px 18px}
.lb-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--ink-mute);margin-bottom:10px;gap:10px;flex-wrap:wrap}
.lb-head b{color:var(--lake-deep)}
.lb-mode{background:#ecfeff;border:1px solid #a5f3fc;color:#0e7490;border-radius:999px;padding:2px 10px;font-size:11.5px;white-space:nowrap}
.lb-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:5px}
.lb-row{display:flex;align-items:center;gap:11px;padding:8px 12px;border-radius:10px;background:#fff;border:1px solid #f0eeeb;font-size:13.5px}
.lb-row.me{background:linear-gradient(135deg,#e0f2fe,#f0f9ff);border-color:#7dd3fc;box-shadow:0 2px 8px rgba(14,165,233,.15);font-weight:700}
.lb-rank{width:26px;text-align:center;color:var(--ink-mute);font-variant-numeric:tabular-nums;flex:none}
.lb-medal{width:26px;text-align:center;font-size:18px;flex:none}
.lb-avatar{font-size:20px;flex:none}
.lb-name{flex:1;color:var(--ink)}
.lb-score{font-weight:800;color:#0369a1;font-variant-numeric:tabular-nums}
.lb-foot{font-size:11.5px;color:var(--ink-mute);line-height:1.7;margin:10px 2px 0}
.lb-loading{padding:26px 0;text-align:center;color:var(--ink-mute);font-size:13.5px}

/* 打卡轻提示 */
.ci-toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,16px);background:rgba(7,17,31,.92);color:#fff;font-size:13.5px;padding:11px 20px;border-radius:999px;opacity:0;pointer-events:none;transition:.25s;z-index:9999;max-width:88vw;text-align:center;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.ci-toast.show{opacity:1;transform:translate(-50%,0)}

@media (max-width:680px){
  .ci-card{grid-template-columns:1fr;gap:16px;padding:16px}
  .ci-hint{max-width:none}
  .ci-cell{font-size:12px;border-radius:7px}
  .ci-nav{width:40px;height:40px}
  .bw-grid{grid-template-columns:repeat(3,1fr);gap:8px}
  .bw-item{padding:10px 4px}
  .bw-ic{font-size:26px}
  .my-leaderboard{padding:13px 12px}
  .lb-row{padding:7px 8px;gap:8px;font-size:12.5px}
  /* 账号卡：操作按钮整行均分，避免三按钮撑出横向滚动 */
  .my-account{flex-wrap:wrap;gap:10px}
  .my-account .ma-actions{flex:1 1 100%;display:flex;gap:8px}
  .my-account .ma-actions .btn{flex:1;min-width:0;padding:9px 8px;white-space:nowrap}
  /* 积分明细时间较窄时允许折行，不再被挤出屏幕 */
  .mp-log li{flex-wrap:wrap;gap:6px 8px}
  .mpl-time{margin-left:auto}
}