/* roulang page: index */
:root{
  --bg:#F7F9FC;
  --bg-soft:#EEF3FA;
  --surface:#FFFFFF;
  --primary:#2E6BE6;
  --primary-weak:#E7EFFD;
  --primary-deep:#2459C7;
  --accent:#F3A24B;
  --accent-soft:#FFF2E2;
  --ink:#16233A;
  --ink-2:#47566F;
  --ink-3:#7A88A0;
  --line:#E2E8F2;
  --ok:#2FA97A;
  --warn:#E4A11B;
  --danger:#DC5A5A;
  --r-card:16px;
  --r-thumb:12px;
  --r-pill:999px;
  --shadow-card:0 1px 2px rgba(22,35,58,.05),0 10px 24px rgba(22,35,58,.06);
  --shadow-hover:0 2px 4px rgba(22,35,58,.06),0 16px 32px rgba(22,35,58,.10);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--primary-deep);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure{margin:0;}
h1{font-size:clamp(30px,4vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:600;}
h3{font-size:19px;line-height:1.4;font-weight:600;}
:focus-visible{outline:3px solid var(--primary-weak);outline-offset:2px;border-radius:6px;}
::selection{background:var(--primary-weak);color:var(--primary-deep);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-alt{background:var(--bg-soft);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;transition:all .2s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(46,107,230,.22);}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(46,107,230,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{background:var(--primary-weak);color:var(--primary-deep);border-color:var(--primary-weak);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;}

/* ---------- 浮动 Dock 导航 ---------- */
.dock-wrap{position:sticky;top:16px;z-index:90;padding:0 16px;}
.dock{
  width:min(1120px,100%);margin:0 auto;
  display:flex;align-items:center;gap:16px;
  height:72px;padding:0 14px 0 20px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  box-shadow:var(--shadow-card);
  transition:height .25s ease,box-shadow .25s ease;
}
.dock.is-scrolled{height:60px;box-shadow:var(--shadow-hover);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  background:linear-gradient(150deg,var(--primary),var(--primary-deep));
  display:grid;place-items:center;color:#fff;flex:0 0 auto;
  box-shadow:0 4px 12px rgba(46,107,230,.28);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{
  position:relative;padding:8px 12px;border-radius:var(--r-pill);
  color:var(--ink-2);font-size:15px;font-weight:500;transition:all .2s ease-out;
}
.nav-link:hover{color:var(--primary);background:var(--primary-weak);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;
  border-radius:3px;background:var(--primary);
}
.dock-search{
  display:flex;align-items:center;gap:8px;
  margin-left:auto;padding:0 14px;height:40px;min-width:180px;
  background:var(--bg-soft);border:1px solid transparent;border-radius:var(--r-pill);
  transition:all .2s ease-out;
}
.dock-search:focus-within{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-weak);}
.dock-search svg{width:17px;height:17px;color:var(--ink-3);flex:0 0 auto;}
.dock-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;color:var(--ink);
}
.dock-search input::placeholder{color:var(--ink-3);}
.dock-cta{flex:0 0 auto;}
.hamburger{
  display:none;width:42px;height:42px;border-radius:var(--r-pill);
  align-items:center;justify-content:center;color:var(--ink-2);
  border:1px solid var(--line);background:var(--surface);
}
.hamburger:hover{background:var(--primary-weak);color:var(--primary);}
.hamburger svg{width:20px;height:20px;}

.drawer-mask{
  position:fixed;inset:0;background:rgba(22,35,58,.4);
  opacity:0;visibility:hidden;transition:opacity .25s ease;z-index:99;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:298px;max-width:86vw;z-index:100;
  background:var(--surface);box-shadow:-12px 0 32px rgba(22,35,58,.14);
  padding:26px 22px;display:flex;flex-direction:column;gap:20px;
  transform:translateX(102%);transition:transform .28s ease;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-title{font-size:16px;font-weight:700;}
.drawer-close{
  width:36px;height:36px;border-radius:var(--r-pill);display:grid;place-items:center;
  border:1px solid var(--line);color:var(--ink-2);background:var(--surface);
}
.drawer-close:hover{background:var(--primary-weak);color:var(--primary);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  padding:12px 14px;border-radius:12px;color:var(--ink-2);font-size:15px;font-weight:500;
}
.drawer-nav a:hover{background:var(--bg-soft);color:var(--primary);}
.drawer-nav a.is-active{background:var(--primary-weak);color:var(--primary);font-weight:600;}

/* ---------- Hero ---------- */
.hero{padding:56px 0 88px;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--primary-weak);color:var(--primary-deep);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);}
.hero h1{margin:20px 0 16px;}
.hero-lead{font-size:17px;color:var(--ink-2);max-width:540px;}
.hero-desc{margin-top:16px;font-size:15px;color:var(--ink-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  padding:7px 15px;border-radius:var(--r-pill);
  background:var(--primary-weak);color:var(--primary-deep);
  font-size:13px;font-weight:500;
}
.hero-preview{
  position:relative;padding:14px;background:var(--surface);
  border:1px solid var(--line);border-radius:calc(var(--r-card) + 6px);
  box-shadow:var(--shadow-card);
}
.preview-stage{position:relative;border-radius:var(--r-card);overflow:hidden;aspect-ratio:16/9;background:var(--bg-soft);}
.preview-stage img{width:100%;height:100%;object-fit:cover;}
.preview-stage .preview-cover{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.96;transition:transform .4s ease-out;
}
.hero-preview:hover .preview-cover{transform:scale(1.03);}
.badge-time{
  position:absolute;right:12px;bottom:12px;z-index:3;
  padding:3px 9px;border-radius:10px;
  background:rgba(22,35,58,.72);color:#fff;
  font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.play-btn{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:4;
  width:62px;height:62px;border-radius:50%;
  background:rgba(255,255,255,.94);color:var(--primary);
  display:grid;place-items:center;
  box-shadow:0 10px 26px rgba(22,35,58,.22);
  transition:all .2s ease-out;
}
.play-btn svg{width:24px;height:24px;margin-left:3px;}
.play-btn:hover{background:#fff;color:var(--primary-deep);transform:translate(-50%,-50%) scale(1.06);}
.preview-caption{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 6px 4px;
}
.preview-caption strong{font-size:15px;font-weight:600;}
.preview-caption span{font-size:13px;color:var(--ink-3);}
.preview-badges{display:flex;flex-wrap:wrap;gap:8px;padding:2px 6px 4px;}
.mini-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:#9A5F12;
  font-size:12px;font-weight:600;
}
.mini-badge svg{width:13px;height:13px;}

/* ---------- 区块标题 ---------- */
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{margin:14px 0 12px;}
.section-head p{color:var(--ink-2);font-size:15px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---------- 通用卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--shadow-card);
  padding:26px;transition:all .2s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.card-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:var(--primary-weak);color:var(--primary);margin-bottom:16px;
}
.card-icon svg{width:22px;height:22px;}
.card h3{margin-bottom:10px;}
.card p{color:var(--ink-2);font-size:14.5px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.text-link svg{width:15px;height:15px;transition:transform .2s ease-out;}
.text-link:hover svg{transform:translateX(3px);}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}

/* ---------- 数据条 ---------- */
.stats-band{background:var(--bg-soft);padding:52px 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat{text-align:left;padding:6px 0 6px 22px;border-left:3px solid var(--primary-weak);}
.stat-num{
  display:block;font-size:clamp(30px,3.4vw,40px);font-weight:700;line-height:1.1;
  color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat-num .stat-unit{font-size:.55em;margin-left:2px;color:var(--primary);}
.stat-label{display:block;margin-top:8px;font-size:14px;color:var(--ink-2);}

/* ---------- 分类入口 ---------- */
.entry-card{
  display:grid;grid-template-columns:340px 1fr;gap:0;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);transition:all .2s ease-out;
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.entry-thumb{position:relative;aspect-ratio:16/9;height:100%;overflow:hidden;background:var(--bg-soft);}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.entry-card:hover .entry-thumb img{transform:scale(1.04);}
.entry-body{padding:32px;display:flex;flex-direction:column;justify-content:center;}
.entry-body h3{margin-bottom:10px;font-size:21px;}
.entry-body p{color:var(--ink-2);font-size:15px;max-width:560px;}
.entry-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:18px;font-size:13px;color:var(--ink-3);}
.entry-meta b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums;}

/* ---------- 专题片单 ---------- */
.topic-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-card);transition:all .2s ease-out;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.topic-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);}
.topic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.topic-card:hover .topic-thumb img{transform:scale(1.04);}
.topic-body{padding:24px;position:relative;}
.topic-index{
  display:inline-grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:var(--accent-soft);color:#9A5F12;font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.topic-body h3{margin-bottom:8px;}
.topic-body p{font-size:14.5px;color:var(--ink-2);}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative;}
.step{position:relative;padding-top:2px;}
.step-num{
  width:46px;height:46px;border-radius:50%;
  background:var(--primary-weak);color:var(--primary);
  display:grid;place-items:center;font-weight:700;font-size:16px;
  font-variant-numeric:tabular-nums;margin-bottom:18px;position:relative;z-index:2;
}
.step::after{
  content:"";position:absolute;left:60px;right:-28px;top:23px;
  border-top:2px dashed var(--line);z-index:1;
}
.step:last-child::after{display:none;}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--ink-2);}

/* ---------- 精选墙（错落） ---------- */
.mosaic{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.wall-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-card);transition:all .2s ease-out;
}
.wall-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.wall-card:nth-child(1){grid-column:span 2;}
.wall-card:nth-child(2){grid-column:span 1;}
.wall-card:nth-child(3){grid-column:span 1;}
.wall-card:nth-child(4){grid-column:span 1;}
.wall-card:nth-child(5){grid-column:span 1;}
.wall-card:nth-child(6){grid-column:span 2;}
.wall-card:nth-child(7){grid-column:span 1;}
.wall-card:nth-child(8){grid-column:span 2;}
.wall-card:nth-child(9){grid-column:span 1;}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.wall-card:hover .thumb img{transform:scale(1.05);}
.thumb .play-mini{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.85);
  width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,.94);color:var(--primary);
  display:grid;place-items:center;opacity:0;transition:all .22s ease-out;
  box-shadow:0 8px 20px rgba(22,35,58,.22);
}
.thumb .play-mini svg{width:18px;height:18px;margin-left:2px;}
.wall-card:hover .play-mini{opacity:1;transform:translate(-50%,-50%) scale(1);}
.wall-body{padding:16px 18px 18px;}
.wall-title{
  font-size:15px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:45px;
}
.wall-meta{display:flex;flex-wrap:wrap;gap:6px 12px;margin-top:10px;font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;}

/* ---------- 拍摄投稿 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.scene-list{display:flex;flex-direction:column;gap:16px;margin-top:28px;}
.scene-item{
  display:flex;gap:16px;padding:20px;border-radius:var(--r-card);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:all .2s ease-out;
}
.scene-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.scene-icon{
  width:42px;height:42px;border-radius:12px;flex:0 0 auto;
  background:var(--primary-weak);color:var(--primary);display:grid;place-items:center;
}
.scene-icon svg{width:20px;height:20px;}
.scene-item h3{font-size:16px;margin-bottom:6px;}
.scene-item p{font-size:14px;color:var(--ink-2);}
.stack-visual{position:relative;}
.stack-card{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);background:var(--surface);
}
.stack-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.stack-card.s1{position:relative;z-index:2;}
.stack-card.s2{position:absolute;right:-10px;bottom:-46px;width:66%;z-index:3;border:5px solid var(--surface);}
.stack-note{
  position:absolute;left:-8px;top:-16px;z-index:4;
  padding:9px 16px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  font-size:13px;font-weight:600;color:var(--primary-deep);
}

/* ---------- 知识小课堂 ---------- */
.know-card{
  display:flex;gap:16px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--shadow-card);transition:all .2s ease-out;
}
.know-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.know-thumb{width:96px;height:68px;flex:0 0 auto;border-radius:var(--r-thumb);overflow:hidden;background:var(--bg-soft);}
.know-thumb img{width:100%;height:100%;object-fit:cover;}
.know-card h3{font-size:15.5px;margin-bottom:6px;}
.know-card p{font-size:13.5px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- 资讯列表 ---------- */
.news-list{display:flex;flex-direction:column;gap:16px;}
.news-item{
  display:grid;grid-template-columns:184px 1fr;gap:22px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--shadow-card);transition:all .2s ease-out;
}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.news-thumb{border-radius:var(--r-thumb);overflow:hidden;aspect-ratio:16/9;background:var(--bg-soft);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body h3{font-size:16.5px;margin-bottom:6px;}
.news-body p{font-size:14px;color:var(--ink-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.news-date{display:inline-block;margin-bottom:8px;font-size:12.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;}
.list-foot{margin-top:28px;text-align:center;}

/* ---------- 更新排期 ---------- */
.week{display:grid;grid-template-columns:repeat(7,1fr);gap:14px;}
.day-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 14px;text-align:center;box-shadow:var(--shadow-card);
  transition:all .2s ease-out;
}
.day-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.day-name{font-size:13px;color:var(--ink-3);font-weight:600;}
.day-count{
  display:block;margin:10px 0 8px;font-size:24px;font-weight:700;
  color:var(--primary);font-variant-numeric:tabular-nums;line-height:1;
}
.day-count em{font-size:12px;font-style:normal;color:var(--ink-3);font-weight:500;margin-left:3px;}
.day-topic{font-size:12.5px;color:var(--ink-2);line-height:1.5;}

/* ---------- 合作伙伴 ---------- */
.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.partner-card{
  display:grid;place-items:center;height:88px;padding:0 16px;text-align:center;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-card);
  color:var(--ink-3);font-size:15px;font-weight:600;
  filter:grayscale(1);transition:all .22s ease-out;
}
.partner-card:hover{
  filter:grayscale(0);color:var(--primary-deep);background:var(--surface);
  border-color:var(--primary-weak);transform:translateY(-2px);box-shadow:var(--shadow-hover);
}

/* ---------- 口碑 ---------- */
.voice-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;height:100%;
  transition:all .2s ease-out;
}
.voice-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.voice-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(150deg,var(--primary-weak),#DCE8FB);
  color:var(--primary-deep);display:grid;place-items:center;font-weight:700;font-size:15px;
}
.voice-name{font-size:15px;font-weight:600;}
.stars{display:flex;gap:2px;color:var(--accent);margin-top:2px;}
.stars svg{width:14px;height:14px;}
.voice-card p{font-size:14.5px;color:var(--ink-2);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;margin:0 auto;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:var(--primary-weak);box-shadow:var(--shadow-hover);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-arrow{
  width:30px;height:30px;border-radius:50%;flex:0 0 auto;
  background:var(--primary-weak);color:var(--primary);
  display:grid;place-items:center;transition:transform .22s ease-out;
}
.faq-arrow svg{width:15px;height:15px;}
.faq-item[open] .faq-arrow{transform:rotate(180deg);}
.faq-body{padding:0 24px 22px;color:var(--ink-2);font-size:14.5px;animation:fadeIn .16s ease-out;}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- 保障条 ---------- */
.guard-band{background:var(--bg-soft);padding:44px 0;}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.guard-item{display:flex;align-items:center;gap:12px;justify-content:center;text-align:left;}
.guard-icon{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:var(--surface);color:var(--ok);display:grid;place-items:center;
  border:1px solid var(--line);
}
.guard-icon svg{width:19px;height:19px;}
.guard-item span{font-size:14px;color:var(--ink-2);}

/* ---------- 表单 CTA ---------- */
.contact-cta{
  position:relative;overflow:hidden;border-radius:24px;
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);
  display:grid;grid-template-columns:1fr 1fr;
}
.contact-left{
  position:relative;padding:52px 44px;color:#fff;
  background-image:linear-gradient(rgba(36,89,199,.82),rgba(36,89,199,.82)),url('/assets/images/backpic/back-4.jpg');
  background-size:cover;background-position:center;
}
.contact-left h2{color:#fff;margin-bottom:14px;}
.contact-left p{font-size:15px;color:rgba(255,255,255,.86);}
.contact-list{margin-top:26px;display:flex;flex-direction:column;gap:14px;}
.contact-list li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:rgba(255,255,255,.94);}
.contact-list svg{width:18px;height:18px;flex:0 0 auto;}
.contact-right{padding:44px;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1/-1;}
.field label{font-size:13.5px;font-weight:600;color:var(--ink-2);}
.field input,.field select,.field textarea{
  height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);padding:0 14px;font-size:14.5px;outline:none;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.field textarea{height:auto;min-height:104px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-weak);
}
.field.is-error input,.field.is-error select,.field.is-error textarea{border-color:var(--danger);}
.field .error-text{display:none;font-size:12.5px;color:var(--danger);}
.field.is-error .error-text{display:block;}
.form-foot{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.form-note{font-size:12.5px;color:var(--ink-3);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);margin-top:96px;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px;}
.footer-brand span{font-size:17px;font-weight:700;color:var(--ink);}
.footer-desc{font-size:14px;color:var(--ink-2);max-width:290px;}
.social-row{display:flex;gap:10px;margin-top:18px;}
.social-row a{
  width:36px;height:36px;border-radius:var(--r-pill);display:grid;place-items:center;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-3);
  transition:all .2s ease-out;
}
.social-row a:hover{color:var(--primary);border-color:var(--primary-weak);background:var(--primary-weak);}
.social-row svg{width:17px;height:17px;}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--ink-2);}
.footer-links a:hover{color:var(--primary);}
.footer-contact li{font-size:14px;color:var(--ink-2);margin-bottom:10px;}
.footer-contact b{color:var(--ink);font-weight:600;}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--ink-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .split{gap:38px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .hero{padding:44px 0 68px;}
  .hero-grid{grid-template-columns:1fr;gap:38px;}
  .hero-preview{max-width:620px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .mosaic{grid-template-columns:repeat(2,1fr);}
  .mosaic .wall-card:nth-child(n){grid-column:span 1;}
  .steps{grid-template-columns:repeat(2,1fr);gap:32px 24px;}
  .step:nth-child(2n)::after{display:none;}
  .step::after{right:-24px;}
  .split{grid-template-columns:1fr;gap:56px;}
  .stack-card.s2{position:relative;right:auto;bottom:auto;width:100%;margin-top:16px;border:1px solid var(--line);}
  .stack-note{position:static;display:inline-flex;margin-bottom:14px;}
  .week{grid-template-columns:repeat(4,1fr);}
  .partner-grid{grid-template-columns:repeat(3,1fr);}
  .guard-grid{grid-template-columns:repeat(2,1fr);}
  .contact-cta{grid-template-columns:1fr;}
  .contact-left,.contact-right{padding:38px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
}
@media (max-width:899px){
  .nav-main,.dock-search{display:none;}
  .hamburger{display:flex;}
  .dock{height:64px;padding:0 12px 0 14px;gap:10px;}
  .dock.is-scrolled{height:58px;}
  .dock-cta{display:none;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .hero{padding:34px 0 56px;}
  h1{font-size:clamp(26px,7vw,32px);}
  h2{font-size:clamp(20px,5.6vw,24px);}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .mosaic{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;gap:22px;}
  .stat{padding-left:18px;}
  .entry-card{grid-template-columns:1fr;}
  .entry-body{padding:24px;}
  .steps{grid-template-columns:1fr;gap:0;}
  .step{padding-left:66px;padding-bottom:34px;}
  .step-num{position:absolute;left:0;top:0;margin-bottom:0;}
  .step::after{
    left:22px;right:auto;top:56px;bottom:10px;width:0;height:auto;
    border-top:0;border-left:2px dashed var(--line);
  }
  .step:nth-child(2n)::after{display:block;}
  .step:last-child{padding-bottom:0;}
  .step:last-child::after{display:none;}
  .week{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory;}
  .day-card{flex:0 0 152px;scroll-snap-align:start;}
  .partner-grid{grid-template-columns:repeat(2,1fr);}
  .guard-grid{grid-template-columns:1fr;}
  .guard-item{justify-content:flex-start;}
  .news-item{grid-template-columns:1fr;gap:14px;}
  .news-body p{white-space:normal;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;}
  .form-grid{grid-template-columns:1fr;}
  .form-foot{flex-direction:column;align-items:stretch;}
  .form-foot .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .site-footer{margin-top:56px;padding-top:48px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%;}
  .wall-meta{font-size:12px;}
  .know-card{flex-direction:column;align-items:flex-start;}
  .know-thumb{width:100%;height:auto;aspect-ratio:16/9;}
}

/* roulang page: category1 */
:root{
 --bg:#F7F9FC;
 --bg-soft:#EEF3FA;
 --surface:#FFFFFF;
 --primary:#2E6BE6;
 --primary-weak:#E7EFFD;
 --primary-deep:#2459C7;
 --accent:#F3A24B;
 --accent-soft:#FFF2E2;
 --ink:#16233A;
 --ink-2:#47566F;
 --ink-3:#7A88A0;
 --line:#E2E8F2;
 --ok:#2FA97A;
 --warn:#E4A11B;
 --danger:#DC5A5A;
 --r-card:16px;
 --r-thumb:12px;
 --r-pill:999px;
 --shadow-card:0 1px 2px rgba(22,35,58,.05),0 10px 24px rgba(22,35,58,.06);
 --shadow-hover:0 2px 4px rgba(22,35,58,.06),0 16px 32px rgba(22,35,58,.10);
 --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
 margin:0;background:var(--bg);color:var(--ink);
 font-family:var(--font);font-size:16px;line-height:1.75;font-weight:400;
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--primary-deep);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.3;}
h1{font-weight:700;}
h2{font-weight:600;}
h3,h4{font-weight:600;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid var(--primary-weak);outline-offset:2px;border-radius:8px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 24px;border-radius:var(--r-pill);
 font-size:15px;font-weight:600;line-height:1.2;
 border:1px solid transparent;transition:all .2s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(46,107,230,.22);}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(46,107,230,.28);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{background:var(--primary-weak);color:var(--primary-deep);border-color:var(--primary-weak);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;}

/* ---------- 浮动 Dock 导航 ---------- */
.site-header{position:sticky;top:16px;z-index:60;padding:16px 16px 0;}
.nav-shell{
 display:flex;align-items:center;gap:14px;
 width:min(1120px,100%);margin:0 auto;height:72px;padding:0 18px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);
 box-shadow:var(--shadow-card);
 transition:height .22s ease,box-shadow .22s ease;
}
.site-header.is-scrolled .nav-shell{height:60px;box-shadow:var(--shadow-hover);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
 width:34px;height:34px;border-radius:11px;
 background:linear-gradient(150deg,var(--primary),var(--primary-deep));
 display:grid;place-items:center;color:#fff;flex:0 0 auto;
 box-shadow:0 4px 12px rgba(46,107,230,.28);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:17px;font-weight:700;white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{position:relative;padding:8px 12px;border-radius:var(--r-pill);color:var(--ink-2);font-size:15px;font-weight:500;transition:all .2s ease-out;}
.nav-link:hover{color:var(--primary);background:var(--primary-weak);}
.nav-link.is-active{color:var(--primary);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;border-radius:3px;background:var(--primary);}
.dock-search{
 display:flex;align-items:center;gap:8px;margin-left:auto;padding:0 14px;height:40px;min-width:180px;
 background:var(--bg-soft);border:1px solid transparent;border-radius:var(--r-pill);
 transition:all .2s ease-out;
}
.dock-search:focus-within{background:var(--surface);border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-weak);}
.dock-search svg{width:17px;height:17px;color:var(--ink-3);flex:0 0 auto;}
.dock-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink);}
.dock-search input::placeholder{color:var(--ink-3);}
.dock-cta{flex:0 0 auto;}
.hamburger{
 display:none;width:42px;height:42px;border-radius:var(--r-pill);
 align-items:center;justify-content:center;color:var(--ink-2);
 border:1px solid var(--line);background:var(--surface);
}
.hamburger:hover{background:var(--primary-weak);color:var(--primary);}
.hamburger svg{width:20px;height:20px;}
.drawer-mask{position:fixed;inset:0;background:rgba(22,35,58,.4);opacity:0;visibility:hidden;transition:opacity .25s ease;z-index:99;}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
 position:fixed;top:0;right:0;bottom:0;width:298px;max-width:86vw;z-index:100;
 background:var(--surface);box-shadow:-12px 0 32px rgba(22,35,58,.14);
 padding:26px 22px;display:flex;flex-direction:column;gap:20px;
 transform:translateX(102%);transition:transform .28s ease;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-title{font-size:16px;font-weight:700;}
.drawer-close{width:36px;height:36px;border-radius:var(--r-pill);display:grid;place-items:center;border:1px solid var(--line);color:var(--ink-2);background:var(--surface);}
.drawer-close:hover{background:var(--primary-weak);color:var(--primary);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{padding:12px 14px;border-radius:12px;color:var(--ink-2);font-size:15px;font-weight:500;}
.drawer-nav a:hover{background:var(--bg-soft);color:var(--primary);}
.drawer-nav a.is-active{background:var(--primary-weak);color:var(--primary);font-weight:600;}

/* ---------- 分类头部区 ---------- */
.cat-hero{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:30px 0 38px;}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--ink-3);}
.crumb a{color:var(--ink-3);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--ink-3);opacity:.6;}
.cat-hero h1{margin:14px 0 12px;font-size:clamp(28px,3.6vw,40px);letter-spacing:-.01em;}
.cat-lead{color:var(--ink-2);font-size:16px;max-width:780px;}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.chip{
 display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:var(--r-pill);
 background:var(--surface);border:1px solid var(--line);font-size:13px;color:var(--ink-2);
 box-shadow:0 1px 2px rgba(22,35,58,.04);
}
.chip b{color:var(--primary);font-weight:700;font-variant-numeric:tabular-nums;}
.chip.accent{background:var(--accent-soft);border-color:var(--accent-soft);color:#8A5720;}
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px;}
.filter-pills{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
 padding:8px 16px;border-radius:var(--r-pill);background:var(--surface);
 border:1px solid var(--line);color:var(--ink-2);font-size:14px;
 transition:all .2s ease-out;
}
.pill:hover{border-color:var(--primary);color:var(--primary);}
.pill.is-on{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 6px 14px rgba(46,107,230,.22);}
.filter-sort{margin-left:auto;}
.filter-sort select{
 appearance:none;-webkit-appearance:none;
 height:42px;padding:0 38px 0 16px;border-radius:var(--r-pill);
 border:1px solid var(--line);background-color:var(--surface);color:var(--ink-2);
 font-size:14px;cursor:pointer;
 background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237A88A0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
 background-repeat:no-repeat;background-position:right 14px center;background-size:16px 16px;
 transition:border-color .2s ease,box-shadow .2s ease;
}
.filter-sort select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-weak);}

/* ---------- 通用板块 ---------- */
.section{padding:72px 0;}
.section-soft{background:var(--bg-soft);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head .sub{margin-top:8px;color:var(--ink-2);font-size:15px;max-width:680px;}
.section-head .more{font-size:14px;font-weight:600;}

/* ---------- 视频卡网格 ---------- */
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.video-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 box-shadow:var(--shadow-card);padding:12px 12px 16px;
 transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.video-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-thumb);background:var(--bg-soft);}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.video-card:hover .thumb img{transform:scale(1.05);}
.badge-duration{
 position:absolute;right:10px;bottom:10px;padding:3px 9px;border-radius:10px;
 background:rgba(22,35,58,.72);color:#fff;font-size:12px;line-height:1.5;
 font-variant-numeric:tabular-nums;
}
.badge-tag{
 position:absolute;left:10px;top:10px;padding:3px 10px;border-radius:10px;
 background:var(--accent);color:#5C3A12;font-size:12px;font-weight:600;
}
.play-fade{
 position:absolute;inset:0;display:grid;place-items:center;
 background:rgba(22,35,58,.18);opacity:0;transition:opacity .2s ease-out;
}
.video-card:hover .play-fade{opacity:1;}
.play-fade span{
 width:48px;height:48px;border-radius:50%;background:var(--surface);color:var(--primary);
 display:grid;place-items:center;box-shadow:var(--shadow-card);
}
.play-fade svg{width:20px;height:20px;margin-left:2px;}
.video-title{
 margin:12px 2px 0;font-size:15px;font-weight:600;line-height:1.5;color:var(--ink);
 display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
 min-height:45px;
}
.video-meta{
 margin:8px 2px 0;font-size:13px;color:var(--ink-3);
 display:flex;align-items:center;gap:10px;font-variant-numeric:tabular-nums;
}
.video-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line);}
.list-foot{margin-top:36px;text-align:center;}

/* ---------- 编辑精选横向条 ---------- */
.rail-wrap{position:relative;}
.rail{
 display:flex;gap:18px;overflow-x:auto;padding:6px 2px 18px;
 scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:#D5DEEE;border-radius:999px;}
.rail-card{
 flex:0 0 268px;scroll-snap-align:start;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 box-shadow:var(--shadow-card);padding:10px 10px 14px;
 transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.rail-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.rail-card .video-title{font-size:14.5px;min-height:43px;margin-top:10px;}
.rail-btn{
 position:absolute;top:calc(50% - 12px);transform:translateY(-50%);
 width:40px;height:40px;border-radius:50%;background:var(--surface);
 border:1px solid var(--line);box-shadow:var(--shadow-card);
 display:grid;place-items:center;color:var(--ink-2);z-index:2;
 transition:all .2s ease-out;
}
.rail-btn:hover{color:var(--primary);border-color:var(--primary-weak);background:var(--primary-weak);}
.rail-btn svg{width:18px;height:18px;}
.rail-btn.prev{left:-16px;}
.rail-btn.next{right:-16px;}

/* ---------- 数据概览条 ---------- */
.mini-strip{
 display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 box-shadow:var(--shadow-card);padding:22px 28px;
}
.mini-item{display:flex;align-items:baseline;gap:8px;}
.mini-item b{
 font-size:26px;font-weight:700;color:var(--primary);line-height:1;
 font-variant-numeric:tabular-nums;
}
.mini-item span{font-size:13px;color:var(--ink-3);}

/* ---------- 标签墙 ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.tag-pill{
 padding:8px 16px;border-radius:var(--r-pill);background:var(--surface);
 border:1px solid var(--line);color:var(--ink-2);font-size:14px;
 transition:all .2s ease-out;
}
.tag-pill:hover{background:var(--primary-weak);border-color:var(--primary-weak);color:var(--primary-deep);}
.tag-pill.warm:hover{background:var(--accent-soft);border-color:var(--accent-soft);color:#8A5720;}

/* ---------- 文章推荐 ---------- */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.article-card{
 display:flex;gap:16px;padding:14px;background:var(--surface);
 border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card);
 transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.article-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--primary-weak);}
.article-card:hover h3{color:var(--primary);}
.thumb-sm{flex:0 0 132px;aspect-ratio:16/11;border-radius:var(--r-thumb);overflow:hidden;background:var(--bg-soft);}
.thumb-sm img{width:100%;height:100%;object-fit:cover;}
.article-card h3{font-size:16px;line-height:1.45;transition:color .2s ease-out;}
.article-card .abs{
 margin-top:6px;font-size:13.5px;color:var(--ink-3);line-height:1.6;
 display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:920px;}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
 box-shadow:var(--shadow-card);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:var(--primary-weak);box-shadow:var(--shadow-hover);}
.faq-item summary{
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:18px 22px;cursor:pointer;font-size:16px;font-weight:600;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item .chev{width:20px;height:20px;color:var(--ink-3);flex:0 0 auto;transition:transform .25s ease,color .25s ease;}
.faq-item[open] .chev{transform:rotate(180deg);color:var(--primary);}
.faq-body{padding:0 22px 20px;color:var(--ink-2);font-size:15px;animation:fadeIn .16s ease-out;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}

/* ---------- 订阅 CTA ---------- */
.sub-band{
 background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-card);
 padding:28px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.sub-band h2{font-size:22px;}
.sub-band p{margin-top:6px;color:var(--ink-2);font-size:14px;}
.sub-form{display:flex;gap:10px;flex:0 0 auto;flex-wrap:wrap;}
.field{
 height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);
 padding:0 16px;font-size:15px;outline:none;min-width:250px;
 transition:border-color .2s ease,box-shadow .2s ease;
}
.field::placeholder{color:var(--ink-3);}
.field:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-weak);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);margin-top:24px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.25fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px;}
.footer-desc{margin-top:14px;color:var(--ink-2);font-size:14px;max-width:340px;}
.social-row{display:flex;gap:10px;margin-top:18px;}
.social-row a{
 width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
 background:var(--surface);border:1px solid var(--line);color:var(--ink-2);
 transition:all .2s ease-out;
}
.social-row a:hover{color:var(--primary);border-color:var(--primary-weak);background:var(--primary-weak);}
.social-row svg{width:18px;height:18px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:var(--ink-2);font-size:14px;}
.footer-links a:hover{color:var(--primary);}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--ink-2);}
.footer-contact b{color:var(--ink);font-weight:600;}
.footer-bottom{
 margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:14px;color:var(--ink-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
 .rail-btn.prev{left:-6px;}
 .rail-btn.next{right:-6px;}
}
@media (max-width:1023px){
 .section{padding:64px 0;}
 .video-grid{grid-template-columns:repeat(2,1fr);}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px 24px;}
 .mini-strip{grid-template-columns:repeat(2,1fr);gap:18px;}
}
@media (max-width:899px){
 .nav-main,.dock-search{display:none;}
 .hamburger{display:flex;margin-left:auto;}
 .dock-cta{display:none;}
 .nav-shell{height:64px;}
}
@media (max-width:767px){
 .container{padding:0 16px;}
 .section{padding:56px 0;}
 .cat-hero{padding:22px 0 30px;}
 .cat-hero h1{font-size:26px;}
 .cat-lead{font-size:15px;}
 .video-grid{grid-template-columns:1fr;}
 .article-grid{grid-template-columns:1fr;}
 .sub-band{padding:22px 20px;flex-direction:column;align-items:flex-start;}
 .sub-form{width:100%;}
 .field{min-width:0;flex:1 1 180px;}
 .footer-grid{grid-template-columns:1fr;gap:26px;}
 .footer-col h4{padding-bottom:10px;border-bottom:1px solid var(--line);}
 .section-head{margin-bottom:24px;}
 .rail-card{flex:0 0 236px;}
 .rail-btn{display:none;}
 .thumb-sm{flex:0 0 108px;}
}
@media (max-width:519px){
 .mini-strip{grid-template-columns:1fr 1fr;padding:18px;}
 .mini-item b{font-size:22px;}
 .video-meta .meta-views{display:none;}
 .sub-form .btn{width:100%;}
 .btn-block-sm{width:100%;}
 .chip{font-size:12px;padding:6px 12px;}
}