/* ==========================================================================
   智起AI · course-site.css  (v2 · 2026-09-30 视觉升级)
   设计系统：品牌紫→品红对角渐变，青色点睛；大留白、20px 圆角、柔和阴影；
   杂志式字体层级。所有历史 class 名保持兼容（模板与 course-site.js 未改名）。
   ========================================================================== */

:root{
  /* 品牌色 */
  --brand-1:#362ACE;          /* 紫 */
  --brand-2:#E037B0;          /* 品红 */
  --brand:#4F3DE0;            /* 文字/链接用中紫 */
  --brand-deep:#3427B8;
  --brand-soft:#EEEBFF;
  --accent:#22D3EE;           /* 青色点睛 */
  --accent-2:#2DD4BF;
  --grad:linear-gradient(135deg,#362ACE 0%,#7A3AD8 55%,#E037B0 100%);
  --grad-btn:linear-gradient(135deg,#3B2ACD 0%,#7A3AD8 60%,#C935B8 100%);
  --grad-text:linear-gradient(90deg,#4F3DE0,#C934B4);

  /* 中性色 */
  --ink:#0F1222;
  --text:#1B1F33;
  --text-2:#3E4460;
  --muted:#6B7189;
  --muted-2:#9AA0B4;
  --line:rgba(35,25,90,.10);
  --line-strong:rgba(35,25,90,.18);
  --bg:#F6F6FB;
  --bg-2:#EFEFF8;
  --panel:#FFFFFF;

  /* 语义色 */
  --ok:#16A36A;
  --warn:#B45309;
  --danger:#C0392B;

  /* 圆角 / 阴影 / 间距 */
  --r-xl:24px; --r-lg:20px; --r-md:16px; --r-sm:12px; --r-xs:8px; --r-pill:999px;
  --sh-xs:0 1px 2px rgba(20,14,60,.05);
  --sh-sm:0 2px 10px rgba(20,14,60,.06);
  --sh-md:0 10px 30px rgba(20,14,60,.09);
  --sh-lg:0 24px 60px rgba(20,14,60,.14);
  --sh-brand:0 12px 28px rgba(79,61,224,.28);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px;

  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC","Segoe UI",system-ui,sans-serif;
  --nav-h:68px;

  /* 兼容旧变量名 */
  --radius-xl:var(--r-xl); --radius-lg:var(--r-lg); --radius-md:var(--r-md);
  --shadow:var(--sh-md); --bg-strong:var(--bg-2); --panel-soft:rgba(255,255,255,.8);
}

/* ---------- Reset / base ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{margin:0;padding:0}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  font-size:15px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:40px;font-weight:800}
h2{font-size:26px;font-weight:800}
h3{font-size:18px;font-weight:700}
h4{font-size:15px;font-weight:700}
p{margin:0}
.course-shell{min-height:100vh;display:flex;flex-direction:column}
.course-shell>main{flex:1 0 auto}
.course-wrap{width:min(1200px,calc(100% - 40px));margin:0 auto}
.subtle{color:var(--muted);line-height:1.75}
.num{font-variant-numeric:tabular-nums}

/* ---------- Nav ---------- */
.site-nav{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.82);
  -webkit-backdrop-filter:saturate(1.4) blur(16px);backdrop-filter:saturate(1.4) blur(16px);
  border-bottom:1px solid var(--line);
}
.site-nav-inner{
  display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;
  min-height:var(--nav-h);
}
.brand-mark{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:800;letter-spacing:.02em}
.brand-mark span:last-child{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.brand-logo{width:38px;height:38px;border-radius:11px;overflow:hidden;flex:none;box-shadow:0 6px 14px rgba(79,61,224,.22)}
.brand-logo img{width:100%;height:100%;object-fit:cover}
.brand-logo svg{width:22px;height:22px}
.nav-links{display:flex;justify-content:center;gap:4px;flex-wrap:wrap}
.nav-links a{padding:9px 14px;border-radius:var(--r-pill);color:var(--text-2);font-weight:600;font-size:14.5px;transition:.18s ease}
.nav-links a:hover{color:var(--brand);background:var(--brand-soft)}
.nav-links a.active{color:var(--brand);background:var(--brand-soft)}
.nav-tools{display:flex;align-items:center;gap:10px;justify-content:flex-end}
.nav-tools .btn-primary{min-width:104px;padding:10px 16px}
.search-box{
  display:flex;align-items:center;gap:8px;width:min(280px,100%);
  padding:9px 14px;border-radius:var(--r-pill);
  background:var(--bg-2);border:1px solid transparent;transition:.18s ease;
}
.search-box:focus-within{background:#fff;border-color:var(--line-strong);box-shadow:0 0 0 4px rgba(79,61,224,.10)}
.search-box svg{width:16px;height:16px;fill:var(--muted-2);flex:none}
.search-box input{width:100%;border:0;outline:0;background:transparent;color:var(--text);font-size:14px}
.search-box input::placeholder{color:var(--muted-2)}

.nav-user-menu{position:relative}
.nav-user-trigger{
  display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;
  border-radius:var(--r-pill);padding:4px 12px 4px 4px;cursor:pointer;color:var(--text);
}
.nav-user-avatar{width:34px;height:34px;border-radius:50%;overflow:hidden;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:800;flex:none;font-size:14px}
.nav-user-avatar img{width:100%;height:100%;object-fit:cover}
.nav-user-name{max-width:92px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600;font-size:14px}
.nav-user-caret{width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin-top:-4px;transition:.2s ease}
.nav-user-menu.open .nav-user-caret{transform:rotate(225deg);margin-top:4px}
.nav-user-dropdown{
  position:absolute;right:0;top:calc(100% + 10px);min-width:170px;padding:8px;
  border-radius:var(--r-md);background:#fff;border:1px solid var(--line);box-shadow:var(--sh-lg);display:none;
}
.nav-user-menu.open .nav-user-dropdown{display:grid}
.nav-user-dropdown a{padding:10px 12px;border-radius:10px;color:var(--text);font-size:14px}
.nav-user-dropdown a:hover{background:var(--brand-soft);color:var(--brand)}

/* 分类下拉（course-site.js 注入） */
.nav-drop{position:relative;display:inline-flex}
.nav-drop::after{content:"";position:absolute;top:100%;left:0;right:0;height:12px}
.nav-drop-menu{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);background:#fff;
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-lg);padding:12px;
  display:none;grid-template-columns:repeat(4,minmax(120px,1fr));gap:2px;z-index:80;min-width:560px;
}
.nav-drop:hover .nav-drop-menu{display:grid}
.nav-drop-menu a{padding:8px 12px;border-radius:8px;color:var(--text-2);font-size:13px;white-space:nowrap;transition:.15s;font-weight:500}
.nav-drop-menu a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- Buttons / chips ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;
  padding:11px 20px;border-radius:var(--r-pill);font-weight:700;font-size:14.5px;line-height:1.1;
  white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,filter .18s ease;
}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-primary{color:#fff;background:var(--grad-btn);box-shadow:var(--sh-brand)}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06)}
.btn-primary:active{transform:none}
.btn-ghost{color:var(--brand);background:#fff;border:1px solid var(--line-strong)}
.btn-ghost:hover{background:var(--brand-soft);border-color:transparent}
.btn-lg{padding:14px 26px;font-size:16px}
.btn-sm{padding:8px 14px;font-size:13px}
.btn-block{width:100%}

.chip,.sort-chip{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:#fff;color:var(--text-2);cursor:pointer;font-size:13.5px;font-weight:500;transition:.15s;
}
.chip:hover,.sort-chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.active,.sort-chip.active{background:var(--grad-btn);color:#fff;border-color:transparent;box-shadow:var(--sh-brand)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:13px;letter-spacing:.02em;
}
.eyebrow svg{width:14px;height:14px;fill:currentColor}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);background:var(--bg-2);color:var(--text-2);font-size:13px;font-weight:500}
.hero-badges,.mini-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero-badges span,.mini-tags span{padding:7px 12px;border-radius:var(--r-pill);background:var(--bg-2);color:var(--text-2);font-size:13px}

/* ---------- Hero (首页) ---------- */
@keyframes fqUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes fqFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.hero{
  position:relative;overflow:hidden;border-radius:28px;margin-top:22px;padding:56px 56px 48px;
  color:#fff;
  background:
    radial-gradient(720px 420px at 96% 8%,rgba(224,55,176,.55),transparent 62%),
    radial-gradient(520px 380px at 4% 100%,rgba(34,211,238,.28),transparent 60%),
    linear-gradient(118deg,#1A1447 0%,#2B22A0 40%,#5A2CC9 72%,#8E2FC4 100%);
  box-shadow:0 30px 80px rgba(42,30,120,.35);
  animation:fqUp .6s ease both;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;mask-image:radial-gradient(ellipse at 70% 40%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 30%,transparent 75%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:32px;align-items:center}
.hero-main{max-width:620px}
.hero .eyebrow{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.18)}
.hero h1{color:#fff;font-size:46px;line-height:1.14;margin:18px 0 16px;font-weight:800;letter-spacing:-.015em}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#FFD1F1,#8DF2FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .hero-main>p{color:rgba(255,255,255,.80);font-size:16px;line-height:1.85;max-width:560px}
.hero .hero-badges{margin-top:20px}
.hero .hero-badges span{background:rgba(255,255,255,.10);color:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.16)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 14px 30px rgba(0,0,0,.22)}
.hero .btn-primary:hover{background:#fff}
.hero .btn-ghost{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.35);color:#fff}
.hero .btn-ghost:hover{background:rgba(255,255,255,.18)}
.hero-visual{position:relative;display:flex;justify-content:flex-end;align-items:center;min-height:320px}
/* 主视觉已按亮度抠成透明底（pack_art.py），直接叠在 hero 渐变上 */
.hero-visual img{width:min(100%,600px);height:auto;filter:drop-shadow(0 24px 40px rgba(20,10,60,.35));animation:fqFloat 7s ease-in-out infinite}
.hero-stats{
  position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,auto);gap:0;margin-top:40px;
  padding-top:28px;border-top:1px solid rgba(255,255,255,.16);width:max-content;max-width:100%;
}
.hero .stat-box,.stat-box{background:transparent;border:0;padding:0 40px 0 0;margin-right:40px;border-right:1px solid rgba(255,255,255,.16);border-radius:0}
.hero .stat-box:last-child{border-right:0;margin-right:0;padding-right:0}
.stat-box strong{display:block;font-size:34px;font-weight:800;line-height:1;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;background:none;-webkit-text-fill-color:#fff}
.stat-box strong small{font-size:16px;font-weight:700;margin-left:2px;opacity:.85}
.stat-box span{display:block;margin-top:8px;color:rgba(255,255,255,.72);font-size:13px;letter-spacing:.04em}
/* 旧「平台简介」侧卡（模板已移除，保留兼容） */
.hero-side{border-radius:var(--r-lg);padding:24px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);color:#fff}
.hero-side h3,.hero-side p,.hero-side strong{color:#fff}
.hero-side .side-list{display:grid;gap:12px;margin-top:18px}
.hero-side .side-item{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.10)}

/* 首页课程方向条 */
.cat-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.cat-row a{
  display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--line);color:var(--text-2);font-size:14px;font-weight:600;transition:.18s;box-shadow:var(--sh-xs);
}
.cat-row a:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh-sm)}
.cat-row a i{width:8px;height:8px;border-radius:50%;background:var(--grad);flex:none}

/* ---------- Sections ---------- */
.section{padding:40px 0 8px}
.section-head{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:end;margin-bottom:22px}
.section-head h2{font-size:26px;letter-spacing:-.01em}
.section-head p{margin:6px 0 0;color:var(--muted);line-height:1.7}
.section-head .btn-ghost{padding:9px 16px}

/* ---------- Course card ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.course-card{
  background:var(--panel);border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;animation:fqUp .45s ease both;
}
.course-card:hover{transform:translateY(-5px);box-shadow:var(--sh-lg);border-color:rgba(79,61,224,.22)}
.course-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#1A1447,#5A2CC9);overflow:hidden;display:block}
.course-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.course-card:hover .course-cover img{transform:scale(1.04)}
.course-cover .fallback-art{position:absolute;inset:0;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#2B22A0,#8E2FC4)}
.course-cover .fallback-art svg{width:48px;height:48px;fill:#fff;opacity:.85}
.course-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.course-meta{display:flex;align-items:center;flex-wrap:wrap;gap:6px 8px;color:var(--muted);font-size:12.5px;margin-bottom:8px}
.course-meta .meta-cat{color:var(--brand);font-weight:600}
.course-meta .meta-dot{width:3px;height:3px;border-radius:50%;background:var(--muted-2)}
.course-title{margin:0 0 10px;font-size:16.5px;line-height:1.4;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-title a:hover{color:var(--brand)}
.course-desc{color:var(--text-2);font-size:13.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:4px;min-height:26px}
.course-chips span{padding:4px 10px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:600;line-height:1.4;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.course-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}
.price{font-size:22px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1}
.price small{font-size:13px;font-weight:700;margin-right:1px}
.price .price-frac{font-size:13px;font-weight:700}
.course-foot .btn-ghost{padding:8px 14px;font-size:13px}

/* ---------- 学员反馈 ---------- */
.comment-grid,.metric-grid,.detail-grid,.center-grid,.history-grid{display:grid;gap:22px}
.comment-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.comment-card,.glass-card,.panel-card{border-radius:var(--r-lg);background:var(--panel);padding:24px;border:1px solid var(--line);box-shadow:var(--sh-sm)}
.comment-card{transition:.2s ease}
.comment-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.comment-card p{color:var(--text-2);line-height:1.8;font-size:14px}
.comment-top{display:flex;justify-content:space-between;gap:10px;margin-bottom:10px;align-items:center}
.comment-top strong{font-size:14px}
.comment-top .subtle{font-size:12px}
#comment-board{display:block;overflow:hidden;position:relative;padding:6px 2px}
#comment-board .comment-track{display:flex;gap:18px;transition:transform .6s ease;will-change:transform}
#comment-board .comment-card{flex:0 0 calc((100% - 36px)/3)}
.glass-card h2{font-size:20px;margin-bottom:14px}
.glass-card h3{margin-bottom:12px}

/* ---------- Page hero（列表/详情/关于/售后/支付/中心） ---------- */
.page-hero{
  position:relative;overflow:hidden;border-radius:28px;margin-top:22px;padding:52px 56px;color:#fff;
  background:
    radial-gradient(600px 360px at 96% 0%,rgba(224,55,176,.5),transparent 62%),
    linear-gradient(118deg,#1A1447 0%,#2B22A0 45%,#5A2CC9 78%,#8E2FC4 100%);
  box-shadow:0 30px 80px rgba(42,30,120,.30);animation:fqUp .6s ease both;
}
.page-hero .page-hero-box{position:relative;z-index:1;max-width:820px}
.page-hero h1{color:#fff;font-size:36px;line-height:1.22;margin:16px 0 12px;letter-spacing:-.015em}
.page-hero p{color:rgba(255,255,255,.82);font-size:15.5px;line-height:1.85;margin:0}
.page-hero .eyebrow{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.18)}
.page-hero .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 14px 30px rgba(0,0,0,.22)}
.page-hero .btn-ghost{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.35);color:#fff}
.page-hero .btn-ghost:hover{background:rgba(255,255,255,.18)}
.page-hero .mini-tags{margin-top:18px}
.page-hero .mini-tags span,.page-hero .hero-badges span{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.18)}
.page-hero .filters{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.page-hero .filters .chip{background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.22)}
.page-hero .filters .chip:hover{background:rgba(255,255,255,.2)}
.page-hero .filters .chip.active{background:#fff;color:var(--brand-deep);border-color:#fff;box-shadow:none}
/* r4：桌面端分类只排 2 行，多余的收进「全部分类 ▾」（lists.html layoutFilters 负责裁行，选中项保证可见） */
.page-hero .filters .chip.is-clipped{display:none}
.page-hero .filters .filters-toggle{
  display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--r-pill);
  border:1px dashed rgba(255,255,255,.55);background:transparent;color:#fff;font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s;
}
.page-hero .filters .filters-toggle:hover{background:rgba(255,255,255,.14);border-style:solid}
.page-hero.compact{padding:40px 48px}
.page-hero.compact h1{font-size:30px}
/* 详情页：封面模糊底图 + 品牌渐变叠加 */
.page-hero.has-art::before{
  content:"";position:absolute;inset:-40px;background-image:var(--hero-img);background-size:cover;background-position:center;
  filter:blur(34px) saturate(1.25);transform:scale(1.12);opacity:.62;
}
.page-hero.has-art::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(26,20,71,.92) 0%,rgba(43,34,160,.78) 45%,rgba(90,44,201,.45) 80%,rgba(142,47,196,.30) 100%);
}

/* ---------- 列表页 ---------- */
.list-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin:0 0 22px}
.sort-list{display:flex;flex-wrap:wrap;gap:8px}
.empty-state{padding:44px 20px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-lg)}
.pager{display:flex;justify-content:center;align-items:center;gap:6px;flex-wrap:wrap;margin:34px 0 10px}
.page-btn{min-width:38px;height:38px;padding:0 12px;border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--text-2);cursor:pointer;font-size:14px;transition:.15s;font-variant-numeric:tabular-nums}
.page-btn:hover:not(:disabled){border-color:var(--brand);color:var(--brand)}
.page-btn.active{background:var(--grad-btn);color:#fff;border-color:transparent}
.page-btn:disabled{opacity:.45;cursor:not-allowed}
.page-gap{color:var(--muted);padding:0 2px}

/* ---------- 详情页 ---------- */
.detail-grid{grid-template-columns:minmax(0,1fr) 380px;align-items:start}
.detail-cover{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,#1A1447,#5A2CC9);box-shadow:var(--sh-md);border:1px solid var(--line)}
.detail-cover img{width:100%;height:100%;object-fit:cover}
.detail-panel{display:grid;gap:18px;position:sticky;top:calc(var(--nav-h) + 16px)}
.price-panel .price{font-size:36px}
.price-panel .price-row{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.price-panel .price-note{color:var(--muted);font-size:13px}
.price-panel .purchase-text{margin:8px 0 18px;color:var(--text-2);font-size:14px}
.price-panel .hero-actions{margin-top:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.price-panel .hero-actions .btn{padding:13px 16px;font-size:15px}
.price-panel .detail-bullets{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.detail-bullets{display:grid;gap:12px}
.bullet-item{display:flex;align-items:flex-start;gap:12px;font-size:14px}
.bullet-item strong{font-size:14px;display:block;margin-bottom:2px}
.bullet-item .subtle{font-size:13px;line-height:1.65}
.bullet-item svg{width:18px;height:18px;fill:var(--brand);flex:none;margin-top:2px}
.bullet-item .subtle a{color:var(--brand);text-decoration:underline;text-underline-offset:2px}
#course-content{color:var(--text-2);line-height:1.85;font-size:14.5px}
#course-content h3,#course-content h4{margin:18px 0 8px;font-size:15.5px;color:var(--ink)}
#course-content ul{padding-left:20px;margin:6px 0}
#course-content li{margin:4px 0}
#course-content p{margin:6px 0}
.outline-list{display:grid;gap:12px}
.outline-item{padding:16px 18px;border-radius:var(--r-md);background:var(--bg);border:1px solid var(--line)}
.outline-item>strong{font-size:14.5px}
.outline-materials{display:grid;gap:8px;margin-top:10px}
.outline-material{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:var(--r-sm);background:#fff;border:1px solid var(--line);font-size:14px}
.outline-material small{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:11px}
.status-lock{color:var(--warn);font-size:13px;font-weight:600;white-space:nowrap}
.status-free{color:var(--ok);font-size:13px;font-weight:600;white-space:nowrap}
.field textarea,.field input{width:100%;padding:13px 14px;border-radius:var(--r-sm);border:1px solid var(--line-strong);background:var(--bg);outline:0;transition:.15s}
.field textarea:focus,.field input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(79,61,224,.10)}
.field textarea{min-height:110px;resize:vertical}
.badge-video{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--r-pill);background:rgba(34,211,238,.18);color:#fff;border:1px solid rgba(34,211,238,.45)!important;font-weight:600}
/* 评价紧凑列表 / 自动滚动 */
#comment-list{display:block}
.comment-rows{max-height:430px;overflow:auto;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff}
.comment-row{display:flex;gap:14px;align-items:baseline;padding:10px 16px;border-bottom:1px solid var(--line)}
.comment-row:last-child{border-bottom:none}
.cr-name{flex:0 0 110px;color:var(--brand);font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cr-text{flex:1;color:var(--text-2);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmt-marquee{height:340px;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;position:relative}
.cmt-track{display:flex;flex-direction:column;animation:cmtScroll linear infinite;will-change:transform}
.cmt-marquee:hover .cmt-track{animation-play-state:paused}
@keyframes cmtScroll{from{transform:translateY(0)}to{transform:translateY(-50%)}}
.cmt-marquee::before,.cmt-marquee::after{content:"";position:absolute;left:0;right:0;height:40px;z-index:2;pointer-events:none}
.cmt-marquee::before{top:0;background:linear-gradient(#fff,rgba(255,255,255,0))}
.cmt-marquee::after{bottom:0;background:linear-gradient(rgba(255,255,255,0),#fff)}
/* 著作权卡 */
.copyright-box{margin-top:14px}
/* r4：手机端吸底购买条（仅 ≤768px 显示；面板/页脚进入视口时下滑收起） */
.buy-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
  background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(20,14,60,.10);
  transform:translateY(0);transition:transform .28s ease,opacity .2s ease;
}
.buy-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.buy-bar-price{display:grid;gap:2px;min-width:0}
.buy-bar-price .price{font-size:26px}
.buy-bar-price span{font-size:12px;color:var(--muted);white-space:nowrap}
.buy-bar .btn{padding:13px 28px;font-size:15.5px;flex:none}
@media (max-width:768px){
  .buy-bar{display:flex}
}
.copyright-card{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;border-radius:var(--r-md);background:linear-gradient(135deg,#1F1B5A,#3B2ACD);color:#fff;box-shadow:var(--sh-md)}
.copyright-badge{font-size:12px;letter-spacing:.04em;padding:5px 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);white-space:nowrap}
.copyright-meta{display:flex;flex-direction:column;gap:2px;flex:1;min-width:160px}
.copyright-meta strong{font-size:15px}
.copyright-meta .subtle{color:rgba(255,255,255,.78);font-size:12px}
.copyright-link.btn{color:var(--brand-deep);background:#fff;border:none;padding:8px 14px;border-radius:10px;font-weight:700;font-size:13px}
.copyright-link.btn:hover{opacity:.92}

/* ---------- 学习页 ---------- */
.player-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;padding:24px 0 40px}
.player-stage{border-radius:var(--r-lg);overflow:hidden;background:var(--panel);border:1px solid var(--line);box-shadow:var(--sh-sm);padding:16px}
.player-screen{aspect-ratio:16/9;background:linear-gradient(135deg,#171A2E,#2B2560);color:#fff;display:grid;place-items:center;padding:20px;border-radius:var(--r-md);overflow:hidden}
.player-screen video,.player-screen iframe,.player-screen img{width:100%;height:100%;object-fit:contain;border:0;border-radius:0}
.player-screen>div{text-align:center;color:rgba(255,255,255,.75)}
.player-info{padding:18px 6px 4px}
.player-info h1{font-size:22px;margin-bottom:6px}
.player-info .subtle{font-size:13.5px}
/* 顶部视频：与封面一致的 16:9 / 20px 圆角 / 中等阴影；poster 为该课 cover v2 */
.video-hero video{
  display:block;width:100%;aspect-ratio:16/9;background:#150A2E;
  border-radius:var(--r-lg)!important;box-shadow:var(--sh-md);object-fit:contain;
}
.playlist{border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--sh-sm);padding:18px;position:sticky;top:calc(var(--nav-h) + 16px);max-height:calc(100vh - var(--nav-h) - 32px);overflow:auto}
.playlist>h3{margin-bottom:12px}
.playlist-group{margin-bottom:14px}
.playlist-group h4{margin:0 0 8px;color:var(--muted);font-size:12.5px;letter-spacing:.04em;text-transform:uppercase}
.playlist-item{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:var(--r-sm);padding:12px 14px;margin-bottom:8px;cursor:pointer;transition:.15s;line-height:1.5}
.playlist-item strong{font-size:14px}
.playlist-item small{color:var(--muted);font-size:12px}
.playlist-item:hover{border-color:var(--brand)}
.playlist-item.active{background:var(--brand-soft);border-color:rgba(79,61,224,.35)}
.playlist-item.active strong{color:var(--brand)}
/* 学习页课件区由 JS 内联样式绘制（业务逻辑未动），这里用 !important 统一到品牌色 */
.resource-panel{border-radius:var(--r-md)!important;background:var(--bg)!important;border:1px solid var(--line)!important}
.resource-card{border-radius:var(--r-sm)!important;border:1px solid var(--line)!important}
.resource-card a,.pdf-actions a,.cert-line a{border-radius:var(--r-pill)!important;font-weight:700!important}
.resource-card a:not([download]),.pdf-actions a[download]{background:var(--grad-btn)!important;color:#fff!important;border:0!important}
.resource-card a[download]{background:#fff!important;color:var(--brand)!important;border:1px solid var(--line-strong)!important}
.cert-line a,.pdf-actions a:not([download]){background:#1F1B5A!important;color:#fff!important}
.resource-card span[style*="background"]{background:var(--brand)!important;border-radius:var(--r-pill)!important}

/* ---------- 支付页（课程订单） ---------- */
.pay-layout{display:grid;grid-template-columns:minmax(0,1.15fr) 380px;gap:22px;align-items:start}
.pay-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}
.pay-header h2{margin:0 0 6px;font-size:20px}
.pay-header .price{font-size:28px;color:var(--brand)}
.pay-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:20px}
.pay-summary-item{padding:14px 16px;border-radius:var(--r-md);background:var(--bg);border:1px solid var(--line)}
.pay-summary-item span{display:block;color:var(--muted);font-size:12.5px;margin-bottom:6px}
.pay-summary-item strong{display:block;font-size:14.5px;word-break:break-all}
.pay-methods{display:grid;gap:12px;margin-bottom:18px}
.pay-method{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;padding:16px 18px;border-radius:var(--r-md);
  border:1.5px solid var(--line);background:#fff;cursor:pointer;transition:.18s ease;
}
.pay-method:hover{border-color:var(--line-strong)}
.pay-method.active{background:var(--brand-soft);border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,61,224,.10)}
.pay-method>span:last-child strong{font-size:15px}
.pay-method span small{display:block;margin-top:3px;color:var(--muted);font-size:12.5px}
.pay-method-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:none;overflow:hidden;background:#fff;border:1px solid var(--line)}
.pay-method-icon img{width:100%;height:100%;object-fit:cover}
#pay-upstreams{border-radius:var(--r-sm)!important;background:var(--bg)!important;border:1px solid var(--line)}
#pay-upstreams .pay-upstream{border-radius:10px!important}
.pay-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}
.pay-actions .btn-primary{padding:13px 28px;font-size:15.5px}
.pay-side{position:sticky;top:calc(var(--nav-h) + 16px)}
.pay-result-box{min-height:400px;display:grid;place-items:center}
.pay-placeholder,.pay-qrcode-box{width:100%;text-align:center}
.pay-placeholder h3{margin:0 0 8px}
.pay-placeholder .subtle{font-size:13.5px;margin-bottom:14px}
.pay-placeholder-icon{width:64px;height:64px;margin:0 auto 16px;border-radius:20px;display:grid;place-items:center;background:var(--grad);color:#fff;font-size:26px;font-weight:800;box-shadow:var(--sh-brand)}
.pay-qrcode{width:220px;height:220px;margin:16px auto;border-radius:var(--r-md);background:#fff;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2);padding:10px;line-height:1.8;box-shadow:var(--sh-sm)}
.pay-qrcode img,.pay-qrcode canvas{border-radius:6px}
.pay-qrcode-title{font-size:20px;font-weight:800}
.pay-tips{display:grid;gap:12px;padding-top:16px;border-top:1px solid var(--line)}
.anti-fraud-tip{border-radius:var(--r-sm)!important}
#pay-countdown-box,#pay-expired-box{border-radius:var(--r-sm)!important}

/* ---------- 关于 / 售后 ---------- */
.about-grid,.auth-layout{display:grid;gap:22px}
.about-grid{grid-template-columns:1fr 1fr}
.metric-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.metric-box{padding:22px;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--sh-sm);position:relative;overflow:hidden;transition:.2s ease}
.metric-box:hover{transform:translateY(-3px);box-shadow:var(--sh-md)}
.metric-box::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--grad)}
.metric-box strong{display:block;font-size:18px;margin-bottom:6px;color:var(--ink)}
.metric-box span{display:block;color:var(--brand);font-weight:700;font-size:14px;margin-bottom:8px;word-break:break-all}
.metric-box p{font-size:13.5px}
.premium-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pstat{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 18px;text-align:center;box-shadow:var(--sh-sm);position:relative;overflow:hidden;animation:fqUp .6s ease both}
.pstat::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--grad)}
.pstat strong{display:block;font-size:36px;line-height:1;font-weight:800;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.pstat span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
.premium-cta{position:relative;overflow:hidden;border-radius:26px;padding:48px;text-align:center;color:#fff;background:var(--grad);box-shadow:0 30px 70px rgba(79,61,224,.30)}
.premium-cta h2{color:#fff;font-size:28px;margin:0 0 10px}
.premium-cta p{color:rgba(255,255,255,.9);margin:0 0 22px}
.premium-cta .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 14px 30px rgba(0,0,0,.18)}
.glass-card{transition:box-shadow .2s ease}
.glass-card:hover{box-shadow:var(--sh-md)}

/* ---------- 个人中心 ---------- */
.center-grid{grid-template-columns:320px 1fr;align-items:start}
.profile-card{border-radius:var(--r-xl);padding:26px;background:var(--grad);color:#fff;box-shadow:var(--sh-brand)}
.profile-card h3{color:#fff}
.avatar-ring{width:78px;height:78px;border-radius:50%;overflow:hidden;display:grid;place-items:center;background:rgba(255,255,255,.22);margin-bottom:16px}
.avatar-ring img{width:100%;height:100%;object-fit:cover}
.profile-card .tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.profile-card .tag-list span{padding:6px 12px;border-radius:var(--r-pill);background:rgba(255,255,255,.16);font-size:12.5px}
.showcase-points{display:grid;gap:12px;margin-top:22px}
.showcase-points .point{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.12)}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tab-btn{border:1px solid var(--line);cursor:pointer;padding:9px 16px;border-radius:var(--r-pill);background:#fff;color:var(--text-2);font-weight:600;font-size:14px}
.tab-btn.active{background:var(--grad-btn);color:#fff;border-color:transparent}
.history-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.history-card{display:flex;gap:14px;align-items:flex-start;padding:14px;border-radius:var(--r-md);background:#fff;border:1px solid var(--line);margin-bottom:12px}
.history-card>div:last-child{min-width:0}
.history-card h3{font-size:15px}
.history-card .subtle{font-size:13px}
.history-thumb{width:128px;aspect-ratio:16/9;height:auto;border-radius:10px;overflow:hidden;background:linear-gradient(135deg,#1A1447,#5A2CC9);flex:none}
.history-thumb img{width:100%;height:100%;object-fit:cover}

/* ---------- 登录/注册 ---------- */
.auth-page{min-height:100vh;background:var(--bg)}
.auth-layout{min-height:100vh;grid-template-columns:1.05fr .95fr;align-items:center;width:min(1120px,calc(100% - 40px));margin:0 auto}
.auth-showcase{padding:28px}
.auth-showcase .showcase-box{border-radius:30px;padding:36px;background:linear-gradient(118deg,#1A1447,#2B22A0 45%,#8E2FC4);color:#fff;box-shadow:0 28px 58px rgba(42,30,120,.30)}
.auth-showcase h1,.auth-showcase h2{color:#fff}
.auth-showcase p{line-height:1.9;color:rgba(255,255,255,.86)}
.auth-card{border-radius:28px;padding:32px;background:#fff;border:1px solid var(--line);box-shadow:var(--sh-md)}
.auth-tabs{display:flex;gap:8px;margin-bottom:22px}
.auth-tabs a{padding:9px 16px;border-radius:var(--r-pill);background:var(--bg-2);color:var(--text-2);font-weight:700;font-size:14px}
.auth-tabs a.active{background:var(--grad-btn);color:#fff}
.auth-card h1{margin:0 0 10px;font-size:30px}
.auth-card p{margin:0 0 22px;color:var(--muted);line-height:1.8}
.field-grid{display:grid;gap:14px}
.inline-row{display:grid;grid-template-columns:1fr 144px;gap:12px}
.tiny-note{font-size:13px;color:var(--muted)}

/* ---------- 页脚（深色四栏） ---------- */
.footer-strip{margin-top:56px;padding:22px 0;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.footer-strip .course-wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;align-items:center}
.site-footer{margin-top:64px;background:#141230;color:rgba(255,255,255,.72);font-size:13.5px;position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background:radial-gradient(700px 300px at 90% 0%,rgba(224,55,176,.16),transparent 65%),radial-gradient(500px 260px at 0% 100%,rgba(54,42,206,.28),transparent 65%);pointer-events:none}
.footer-grid{position:relative;display:grid;grid-template-columns:1.45fr .7fr 1.55fr 1.3fr;gap:36px;padding:56px 0 40px}
.footer-brand .brand-mark{color:#fff;font-size:20px}
.footer-brand .brand-mark span:last-child{background:none;-webkit-text-fill-color:#fff;color:#fff}
.footer-brand p{margin-top:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer-fraud{margin-top:18px;display:inline-flex;align-items:flex-start;gap:8px;padding:10px 12px;border-radius:12px;background:rgba(255,120,120,.10);border:1px solid rgba(255,120,120,.25);color:#FFB4B4;font-size:12.5px;line-height:1.6;max-width:340px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{color:rgba(255,255,255,.66);transition:.15s}
.footer-col a:hover{color:#fff}
.footer-col li{color:rgba(255,255,255,.66);line-height:1.6}
.footer-col li b{color:rgba(255,255,255,.88);font-weight:600}
.footer-col .footer-cats{display:grid;grid-template-columns:1fr 1fr;gap:10px 16px}
.footer-col .footer-cats a{white-space:nowrap}
.footer-bottom{position:relative;border-top:1px solid rgba(255,255,255,.10);padding:18px 0 26px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;color:rgba(255,255,255,.5);font-size:12.5px}
.footer-bottom a{color:rgba(255,255,255,.62)}
.footer-bottom a:hover{color:#fff}
.site-beian a{color:inherit}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:24px}
  .hero h1{font-size:40px}
}
/* 栅格子项最小宽度归零：避免 nowrap 文本（评价滚动行等）把整列撑出视口 */
.detail-grid>*,.player-layout>*,.pay-layout>*,.center-grid>*,.about-grid>*,.card-grid>*,.comment-grid>*{min-width:0}
.cr-text,.cr-name{min-width:0}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1fr)}
  .hero-visual{display:none}
  .detail-grid,.player-layout,.center-grid,.auth-layout,.about-grid,.pay-layout{grid-template-columns:minmax(0,1fr)}
  .detail-panel,.pay-side,.playlist{position:static;max-height:none}
  /* 详情页单列时把两列拍平，价格/购买面板紧跟封面（不必滚到页底才见「立即购买」） */
  .detail-grid>div:first-child,.detail-grid .detail-panel{display:contents}
  .detail-grid .detail-cover,.detail-grid .copyright-box,.detail-grid .glass-card,.detail-grid .panel-card{min-width:0}
  .detail-grid .detail-cover{order:1}
  .detail-grid .copyright-box{order:3;margin-top:0}
  .detail-grid .glass-card{order:4;margin-top:0!important}
  .detail-grid .panel-card{order:5}
  .detail-grid .price-panel{order:2}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .site-nav-inner{grid-template-columns:max-content minmax(0,1fr);grid-template-areas:"brand tools" "links links";gap:6px 12px;padding:10px 0}
  .brand-mark{grid-area:brand}
  .nav-tools{grid-area:tools;min-width:0;flex-wrap:nowrap}
  .nav-tools .btn{white-space:nowrap}
  .nav-user-trigger{min-width:0}
  .nav-links{grid-area:links;justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{flex:none;padding:7px 12px;font-size:14px}
  .nav-drop-menu{left:0;transform:none;min-width:420px;grid-template-columns:repeat(3,1fr)}
}
@media (max-width:820px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .comment-grid{grid-template-columns:1fr 1fr}
  #comment-board .comment-card{flex:0 0 calc((100% - 18px)/2)}
  .premium-stats{grid-template-columns:repeat(2,1fr)}
  .hero{padding:40px 28px 36px;border-radius:22px}
  .page-hero{padding:40px 28px;border-radius:22px}
  .hero-stats{grid-template-columns:repeat(3,1fr);width:100%}
  .hero .stat-box{padding-right:14px;margin-right:14px}
  .stat-box strong{font-size:28px}
}
@media (max-width:600px){
  .course-wrap,.auth-layout{width:min(100% - 24px,1200px)}
  .search-box{display:none}
  .nav-tools .btn-primary{min-width:0;padding:9px 14px;font-size:13.5px}
  .nav-tools .btn-ghost{padding:8px 12px;font-size:13px}
  .nav-user-name{max-width:64px}
  .brand-mark{font-size:18px}
  .brand-logo{width:34px;height:34px;border-radius:10px}
  .hero{margin-top:14px;padding:30px 20px 28px;border-radius:20px}
  .hero h1{font-size:30px;margin:14px 0 12px}
  .hero .hero-main>p{font-size:14.5px}
  .hero-badges{display:none}
  .hero-actions .btn{flex:1 1 auto}
  .hero-stats{margin-top:26px;padding-top:20px;gap:0}
  .hero .stat-box{padding-right:10px;margin-right:10px}
  .stat-box strong{font-size:22px}
  .stat-box strong small{font-size:12px}
  .stat-box span{font-size:11.5px;margin-top:6px}
  .cat-row{margin:14px -12px 0;padding:2px 12px 6px;gap:8px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .cat-row::-webkit-scrollbar{display:none}
  .cat-row a{padding:8px 12px;font-size:13px;flex:none}
  .section{padding:28px 0 4px}
  .section-head{grid-template-columns:1fr;gap:8px;margin-bottom:16px}
  .section-head h2{font-size:22px}
  .section-head .btn{justify-self:start}
  .card-grid{grid-template-columns:1fr;gap:16px}
  .course-body{padding:14px 16px 16px}
  .comment-grid,.metric-grid,.history-grid,.inline-row,.pay-summary,.premium-stats{grid-template-columns:1fr}
  #comment-board .comment-card{flex:0 0 100%}
  .page-hero{margin-top:14px;padding:30px 20px;border-radius:20px}
  .page-hero h1{font-size:26px}
  .page-hero p{font-size:14.5px}
  /* 22 个分类在手机上改为两行横向滑动条，避免把课程列表推到首屏之外 */
  .page-hero .filters{
    display:grid;grid-auto-flow:column;grid-template-rows:repeat(2,auto);grid-auto-columns:max-content;
    gap:8px;justify-content:start;margin:18px -20px 0;padding:0 20px 6px;
    overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;
  }
  .page-hero .filters::-webkit-scrollbar{display:none}
  .page-hero .filters .chip{white-space:nowrap}
  .page-hero .filters .chip,.sort-chip{padding:7px 12px;font-size:13px}
  .detail-grid{gap:16px}
  .list-toolbar{align-items:flex-start;flex-direction:column}
  .sort-list{width:100%;flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .sort-list::-webkit-scrollbar{display:none}
  .sort-chip{flex:none}
  .comment-card,.glass-card,.panel-card,.auth-card,.auth-showcase .showcase-box{padding:18px;border-radius:var(--r-md)}
  .price-panel .hero-actions{grid-template-columns:1fr}
  .price-panel .price{font-size:32px}
  .pay-header{flex-direction:column}
  .pay-method{padding:14px}
  .player-layout{padding:14px 0 28px;gap:14px}
  .player-stage{padding:10px}
  .player-info{padding:14px 4px 2px}
  .player-info h1{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
  .premium-cta{padding:32px 20px;border-radius:20px}
  .premium-cta h2{font-size:22px}
  .cmt-marquee{height:280px}
  .cr-name{flex-basis:84px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* ==========================================================================
   首页 v3（2026-09-30）：通栏 Hero / 四大方向 / 价值点 / 学习路径 / 引言卡 / 合规信任带
   + 「最新上架」独立页。全部为新增 class，不改动既有组件。
   ========================================================================== */
.page-home main{padding-top:0}
.hero-full{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(118deg,#12103A 0%,#241C8F 38%,#5A2CC9 70%,#8E2FC4 100%);
}
.hero-full-bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(900px 520px at 88% 10%,rgba(224,55,176,.55),transparent 62%),
    radial-gradient(700px 480px at 6% 95%,rgba(34,211,238,.26),transparent 60%);
}
.hero-full-bg::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse at 65% 40%,#000 25%,transparent 75%);mask-image:radial-gradient(ellipse at 65% 40%,#000 25%,transparent 75%);
}
.hero-full-inner{
  position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:40px;align-items:center;padding:84px 0 44px;min-height:min(78vh,720px);
}
.hero-full-copy{max-width:640px;animation:fqUp .7s ease both}
.hero-full .eyebrow{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.18)}
.hero-full h1{color:#fff;font-size:60px;line-height:1.08;margin:22px 0 18px;font-weight:800;letter-spacing:-.02em}
.hero-full h1 em{font-style:normal;background:linear-gradient(90deg,#FFD1F1,#8DF2FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-full-copy>p{color:rgba(255,255,255,.82);font-size:17px;line-height:1.85;max-width:580px}
.hero-search{
  display:flex;align-items:center;gap:10px;margin-top:28px;padding:8px 8px 8px 18px;max-width:640px;
  border-radius:var(--r-pill);background:#fff;box-shadow:0 18px 44px rgba(0,0,0,.25);
}
.hero-search svg{width:20px;height:20px;fill:var(--muted-2);flex:none}
.hero-search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:15.5px;color:var(--text);padding:8px 0}
.hero-search input::placeholder{color:var(--muted-2)}
.hero-search .btn-primary{padding:12px 22px;flex:none}
.hero-full-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:22px}
.hero-full .btn-ghost{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.35);color:#fff}
.hero-full .btn-ghost:hover{background:rgba(255,255,255,.18)}
.hero-link{color:rgba(255,255,255,.85);font-weight:600;font-size:14.5px;border-bottom:1px solid rgba(255,255,255,.35);padding-bottom:2px;transition:.15s}
.hero-link:hover{color:#fff;border-color:#fff}
.hero-full-visual{position:relative;display:flex;justify-content:flex-end;align-items:center;min-height:360px}
.hero-full-visual img{width:min(100%,640px);height:auto;filter:drop-shadow(0 30px 50px rgba(20,10,60,.4));animation:fqFloat 7s ease-in-out infinite}
.hero-trust{
  position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
  padding:26px 0 40px;border-top:1px solid rgba(255,255,255,.16);
}
.trust-item strong{display:block;font-size:34px;font-weight:800;line-height:1;color:#fff;letter-spacing:-.02em}
.trust-item span{display:block;margin-top:8px;color:rgba(255,255,255,.72);font-size:13px;letter-spacing:.04em}

/* 居中版块头 */
.section-head.center{grid-template-columns:1fr;text-align:center;justify-items:center;margin-bottom:30px}
.section-head.center h2{font-size:32px;margin-top:14px}
.section-head.center p{max-width:560px}
.pillars-section,.value-section,.path-section{padding-top:64px}

/* 四大方向：2×2 宽幅图卡，文字压左侧暗部，插画主体在右 */
.pillars{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.pillar{
  position:relative;display:block;border-radius:var(--r-xl);overflow:hidden;aspect-ratio:2/1;background:#1A1447;color:#fff;
  box-shadow:var(--sh-md);transition:transform .25s ease,box-shadow .25s ease;
}
.pillar:hover{transform:translateY(-6px);box-shadow:var(--sh-lg)}
.pillar picture,.pillar img{position:absolute;inset:0;width:100%;height:100%}
.pillar img{object-fit:cover;object-position:70% 50%;transition:transform .6s ease}
.pillar:hover img{transform:scale(1.05)}
.pillar::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,10,45,.92) 0%,rgba(15,10,45,.74) 38%,rgba(15,10,45,.18) 66%,rgba(15,10,45,0) 100%)}
.pillar-body{position:absolute;left:0;top:0;bottom:0;width:60%;padding:30px;z-index:1;display:flex;flex-direction:column;justify-content:center}
.pillar-count{display:inline-block;align-self:flex-start;padding:5px 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);font-size:12.5px;color:rgba(255,255,255,.9)}
.pillar-count b{font-weight:800;font-size:13px}
.pillar h3{color:#fff;font-size:26px;margin:14px 0 6px;letter-spacing:-.01em}
.pillar p{color:rgba(255,255,255,.78);font-size:14px;line-height:1.6}
.pillar-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.pillar-tags span{padding:4px 10px;border-radius:var(--r-pill);background:rgba(255,255,255,.12);font-size:12px;color:#fff}

/* 价值点 */
.value-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.value-item{padding:26px 24px;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--sh-sm);transition:.2s ease}
.value-item:hover{box-shadow:var(--sh-md);transform:translateY(-3px)}
.value-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--brand-soft);color:var(--brand);margin-bottom:16px}
.value-icon svg{width:24px;height:24px;fill:currentColor}
.value-item h3{font-size:17px;margin-bottom:8px}
.value-item p{color:var(--text-2);font-size:14px;line-height:1.75}

/* 学习路径 */
.path{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;position:relative}
.path::before{content:"";position:absolute;left:6%;right:6%;top:26px;height:2px;background:linear-gradient(90deg,var(--brand-1),var(--brand-2));opacity:.22}
.path-step{position:relative;padding:0 6px}
.path-no{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--grad-btn);color:#fff;font-weight:800;font-size:15px;box-shadow:var(--sh-brand);position:relative;z-index:1}
.path-step h3{font-size:19px;margin:18px 0 8px}
.path-step p{color:var(--text-2);font-size:14px;line-height:1.75;min-height:50px}
.path-links{display:flex;flex-direction:column;gap:6px;margin-top:12px}
.path-links a{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:9px 12px;border-radius:var(--r-sm);background:var(--panel);border:1px solid var(--line);font-size:13.5px;font-weight:600;color:var(--text);transition:.15s}
.path-links a:hover{color:var(--brand);border-color:var(--brand)}
.path-links a em{font-style:normal;color:var(--muted);font-weight:600;font-size:12.5px;white-space:nowrap}

/* 学员评价：大引言卡 */
.quote-card{position:relative;padding:28px 26px 22px}
.quote-mark{position:absolute;top:8px;left:20px;font-size:64px;line-height:1;font-weight:800;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.55}
.quote-card p{position:relative;font-size:15px;line-height:1.85;color:var(--text);margin-top:18px;min-height:84px}
.quote-foot{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.quote-avatar{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;flex:none}
.quote-foot strong{display:block;font-size:14px}
.quote-foot small{color:var(--muted);font-size:12px}

/* 合规信任带（通栏） */
.trust-band{margin-top:72px;color:#fff;position:relative;overflow:hidden;background:linear-gradient(118deg,#12103A 0%,#241C8F 45%,#5A2CC9 100%)}
.trust-band::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(700px 420px at 90% 20%,rgba(224,55,176,.45),transparent 62%),radial-gradient(500px 360px at 8% 100%,rgba(34,211,238,.22),transparent 60%)}
.trust-band-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.2fr 1fr;gap:40px;padding:64px 0;align-items:center}
.trust-band .eyebrow{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.18)}
.trust-band h2{color:#fff;font-size:32px;margin:16px 0 14px;letter-spacing:-.015em}
.trust-band p{color:rgba(255,255,255,.8);line-height:1.85;font-size:15px;max-width:560px}
.trust-band-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.trust-band-list li{padding:18px 20px;border-radius:var(--r-lg);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14)}
.trust-band-list strong{display:block;font-size:24px;font-weight:800;letter-spacing:-.01em}
.trust-band-list span{display:block;color:rgba(255,255,255,.72);font-size:13px;margin-top:4px}
.trust-band-actions{grid-column:1/-1;display:flex;gap:12px;flex-wrap:wrap}
.trust-band .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 14px 30px rgba(0,0,0,.22)}
.trust-band .btn-primary:hover{background:#fff}
.trust-band .btn-ghost{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.35);color:#fff}
.trust-band .btn-ghost:hover{background:rgba(255,255,255,.18)}
.page-home .site-footer,.page-home footer.site-footer{margin-top:0}

/* 滚动出现 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}

/* 最新上架页 */
.newest-hero h1 em{font-style:normal;background:linear-gradient(90deg,#FFD1F1,#8DF2FF);-webkit-background-clip:text;background-clip:text;color:transparent}
.newest-stats{display:grid;grid-template-columns:repeat(4,auto);gap:0;margin-top:26px;padding-top:22px;border-top:1px solid rgba(255,255,255,.16);width:max-content;max-width:100%}
.newest-stats div{padding:0 32px 0 0;margin-right:32px;border-right:1px solid rgba(255,255,255,.16)}
.newest-stats div:last-child{border:0;margin:0;padding:0}
.newest-stats strong{display:block;font-size:28px;font-weight:800;color:#fff;line-height:1;letter-spacing:-.02em}
.newest-stats span{display:block;margin-top:6px;color:rgba(255,255,255,.72);font-size:12.5px}
.newest-group{margin-top:34px}
.newest-day{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.newest-day h2{font-size:22px}
.newest-dot{width:10px;height:10px;border-radius:50%;background:var(--grad);align-self:center;flex:none}
.newest-count{margin-left:auto}
.load-more{display:flex;justify-content:center;margin:36px 0 8px}

@media (max-width:1180px){
  .hero-full h1{font-size:52px}
}
@media (max-width:1024px){
  .hero-full-inner{grid-template-columns:minmax(0,1fr);padding:56px 0 28px;min-height:0}
  .hero-full-visual{display:none}
  .pillars{grid-template-columns:1fr}
  .pillar{aspect-ratio:16/9}
  .value-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .path{grid-template-columns:repeat(2,minmax(0,1fr))}
  .path::before{display:none}
  .trust-band-inner{grid-template-columns:1fr;padding:48px 0}
}
@media (max-width:600px){
  .hero-full-inner{padding:36px 0 20px}
  .hero-full h1{font-size:34px;margin:14px 0 12px}
  .hero-full-copy>p{font-size:14.5px}
  .hero-search{padding:6px 6px 6px 14px;margin-top:20px}
  .hero-search .btn-primary{padding:10px 14px;font-size:13.5px}
  .hero-search input{font-size:14px}
  .hero-full-actions{gap:12px}
  .hero-trust{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 12px;padding:20px 0 28px}
  .trust-item strong{font-size:26px}
  .section-head.center h2{font-size:24px}
  .pillars-section,.value-section,.path-section{padding-top:40px}
  .pillar{aspect-ratio:4/3}
  .pillar img{object-position:60% 30%}
  .pillar::after{background:linear-gradient(180deg,rgba(15,10,45,0) 22%,rgba(15,10,45,.55) 52%,rgba(15,10,45,.94) 100%)}
  .pillar-body{width:100%;padding:18px;justify-content:flex-end}
  .pillar h3{font-size:20px;margin-top:10px}
  .value-grid,.path{grid-template-columns:1fr}
  .path-step p{min-height:0}
  .trust-band{margin-top:44px}
  .trust-band h2{font-size:24px}
  .trust-band-inner{padding:40px 0}
  .newest-stats{grid-template-columns:repeat(2,1fr);width:100%;gap:16px 0}
  .newest-stats div{padding-right:10px;margin-right:10px}
  .newest-stats div:nth-child(2){border:0}
  .newest-stats strong{font-size:22px}
  .newest-day{flex-wrap:wrap}
}

/* ===== 2026-09-30 r6：导航与标题字体（阿里巴巴普惠体 3.0） ===== */
/* 仅导航 + 标题层级使用；正文保持系统字体。子集 ≈4000 字（GB2312 一级 + ASCII + 标点 + 站内用字），每个 woff2 ≈500KB，swap 不阻塞首屏 */
@font-face{font-family:"Alibaba PuHuiTi";font-weight:700;font-style:normal;font-display:swap;src:url("/assets/fonts/AlibabaPuHuiTi-Bold.woff2?v=20260930e") format("woff2")}
@font-face{font-family:"Alibaba PuHuiTi";font-weight:500;font-style:normal;font-display:swap;src:url("/assets/fonts/AlibabaPuHuiTi-Medium.woff2?v=20260930e") format("woff2")}
:root{--font-display:"Alibaba PuHuiTi","PingFang SC","Microsoft YaHei","Noto Sans SC","Segoe UI",system-ui,sans-serif}

/* 标题层级：h1/h2/h3/h4 + 课程卡片标题（封面图内文字不受影响） */
h1,h2,h3,h4,.course-title,.newest-day,.pillar h3,.quote-card blockquote strong{font-family:var(--font-display)}
h1,h2{font-weight:700;letter-spacing:-.015em}
h3,h4,.course-title{font-weight:700}
.hero-full h1,.page-hero h1,.premium-cta h2,.trust-band h2{font-weight:700}

/* 品牌字标：与 logo 同高垂直居中，渐变填充 */
.brand-mark{font-family:var(--font-display);font-weight:700;font-size:21px;letter-spacing:.02em;line-height:1;gap:10px}
.brand-mark span:last-child{display:inline-block;line-height:1;padding-top:2px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent;white-space:nowrap}
.footer-brand .brand-mark span:last-child{background:none;-webkit-text-fill-color:#fff;color:#fff}

/* 导航项：Medium 15px、收紧字距；hover 渐变下划线；active 保留品牌胶囊 */
.nav-links{flex-wrap:nowrap;gap:2px}
.nav-links a{position:relative;font-family:var(--font-display);font-weight:500;font-size:15px;letter-spacing:-.01em;white-space:nowrap;padding:9px 14px;color:var(--text-2)}
.nav-links a::after{content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;background:var(--grad);opacity:0;transform:scaleX(.4);transform-origin:50% 50%;transition:transform .22s ease,opacity .22s ease}
.nav-links a:hover{color:var(--ink);background:transparent}
.nav-links a:hover::after{opacity:1;transform:scaleX(1)}
.nav-links a.active,.nav-links a.active:hover{color:var(--brand);background:var(--brand-soft)}
.nav-links a.active::after{display:none}
.nav-drop-menu a{font-family:var(--font);font-weight:500;letter-spacing:0;padding:8px 12px;font-size:13px;color:var(--text-2)}
.nav-drop-menu a::after{display:none}
.nav-drop-menu a:hover{background:var(--brand-soft);color:var(--brand)}

/* 登录/注册按钮、用户胶囊：同一字族 */
.nav-tools .btn{font-family:var(--font-display);font-weight:500;letter-spacing:.01em}
.nav-user-trigger,.nav-user-name{font-family:var(--font-display);font-weight:500;letter-spacing:0}
.nav-user-dropdown a{font-family:var(--font)}

@media (max-width:1024px){
  .nav-links a{font-size:14.5px;padding:7px 12px}
  .nav-links a::after{left:12px;right:12px;bottom:3px}
  .brand-mark{font-size:20px}
}
@media (max-width:600px){
  .brand-mark{font-size:19px;gap:8px}
  .nav-links a{font-size:14px;padding:7px 11px}
}