/* roulang page: index */
:root{
  --ink:#14171A;
  --ink-2:#2B3033;
  --body:#4A5154;
  --muted:#8A9198;
  --bg:#F6F4EF;
  --bg-alt:#ECE8DF;
  --surface:#FFFFFF;
  --line:#E0DCD3;
  --accent:#E8542B;
  --accent-dark:#C43F1B;
  --trust:#0F6B5C;
  --medal:#B98A3C;
  --danger:#B3261E;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(20,23,26,.04),0 1px 3px rgba(20,23,26,.06);
  --sh-md:0 6px 18px rgba(20,23,26,.06);
  --sh-lg:0 18px 40px rgba(20,23,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  text-align:left;
  padding-bottom:0;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ink);text-decoration:none;transition:color 160ms var(--ease);}
a:hover{color:var(--accent);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:16px;}
table{border-collapse:collapse;border-spacing:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%;}
.grid-x{display:flex;flex-wrap:wrap;gap:24px;}
.grid-x > .cell{min-width:0;width:auto;flex:1 1 100%;}
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-line{border-top:1px solid var(--line);}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--muted);display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);display:inline-block;}
h1{font-size:clamp(32px,5.2vw,58px);font-weight:800;letter-spacing:-.02em;line-height:1.12;color:var(--ink);}
h2{font-size:clamp(26px,3.4vw,38px);font-weight:700;line-height:1.25;color:var(--ink);letter-spacing:-.01em;}
h3{font-size:21px;font-weight:600;line-height:1.4;color:var(--ink);}
h4{font-size:16px;font-weight:600;letter-spacing:.02em;color:var(--ink);}
.lead{font-size:17px;color:var(--body);max-width:62ch;}
.muted{color:var(--muted);font-size:13px;}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;font-weight:600;font-size:15px;letter-spacing:.01em;transition:all 200ms var(--ease);white-space:nowrap;}
.btn i{transition:transform 200ms var(--ease);font-size:13px;}
.btn:hover i{transform:translateX(4px);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:var(--accent);color:#fff;}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-dark);color:#fff;}
.btn-ghost{background:var(--surface);color:var(--trust);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--trust);color:var(--trust);background:#fff;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;color:var(--ink);position:relative;}
.link-arrow::after{content:"→";transition:transform 200ms var(--ease);}
.link-arrow:hover{color:var(--accent);}
.link-arrow:hover::after{transform:translateX(4px);}
.text-link{position:relative;font-weight:600;}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;width:100%;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform 240ms var(--ease);}
.text-link:hover::after{transform:scaleX(1);}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;line-height:1.6;font-weight:600;}
.badge-cat{background:rgba(15,107,92,.09);color:var(--trust);}
.badge-medal{background:rgba(185,138,60,.13);color:var(--medal);}
.badge-gray{background:rgba(138,145,152,.14);color:var(--muted);font-weight:500;}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:900;background:rgba(246,244,239,.92);border-bottom:1px solid var(--line);transition:all 240ms var(--ease);}
.site-header.is-shrink{background:rgba(246,244,239,.96);box-shadow:var(--sh-sm);}
.header-inner{display:flex;align-items:center;gap:32px;height:72px;transition:height 240ms var(--ease);}
.site-header.is-shrink .header-inner{height:60px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:20px;height:20px;border-radius:5px;background:linear-gradient(135deg,var(--ink) 0 50%,var(--accent) 50% 100%);position:relative;flex-shrink:0;}
.logo-mark::after{content:"";position:absolute;left:6px;top:6px;width:8px;height:8px;border:2px solid #fff;border-radius:50%;}
.logo-text{font-weight:800;font-size:17px;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px;}
.nav-link{position:relative;padding:8px 12px;font-size:15px;font-weight:500;color:var(--ink-2);border-radius:8px;}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform 200ms var(--ease);}
.nav-link:hover{color:var(--accent);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:18px;margin-left:auto;}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);align-items:center;justify-content:center;}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:var(--surface);}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{display:block;padding:14px 24px;border-bottom:1px solid var(--line);font-weight:500;color:var(--ink-2);}
.mobile-drawer a.is-active{color:var(--accent);font-weight:700;}

/* Hero */
.hero{padding:72px 0 0;position:relative;overflow:hidden;}
.hero::before{content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(232,84,43,.10),rgba(232,84,43,0) 68%);pointer-events:none;}
.hero-copy{max-width:620px;}
.hero h1{margin-bottom:20px;}
.hero-sub{font-size:18px;color:var(--body);margin-bottom:32px;max-width:36ch;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.trust-row{display:flex;flex-wrap:wrap;gap:26px;}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);}
.trust-item i{color:var(--trust);font-size:15px;}
.hero-visual{position:relative;}
.hero-media{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);aspect-ratio:4/3;background:#ded8cc;}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.float-card{position:absolute;left:-16px;bottom:-28px;width:250px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-lg);padding:20px;}
.float-card h4{font-size:13px;letter-spacing:.08em;color:var(--muted);margin-bottom:12px;}
.step-item{display:flex;align-items:center;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line);}
.step-item:last-child{border-bottom:0;padding-bottom:0;}
.step-num{font-size:24px;font-weight:800;color:transparent;-webkit-text-stroke:1.2px var(--accent);line-height:1;font-variant-numeric:tabular-nums;}
.step-item span:last-child{font-size:14px;color:var(--ink-2);font-weight:500;}

/* 数据条 */
.stats{margin-top:88px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;}
.stat{flex:1 1 220px;padding:32px 24px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat-num{font-size:clamp(34px,4vw,50px);font-weight:800;color:var(--ink);line-height:1;letter-spacing:-.02em;}
.stat-num em{font-style:normal;font-size:18px;font-weight:600;color:var(--accent);margin-left:4px;}
.stat-label{font-size:13px;color:var(--muted);margin-top:10px;}

/* 权益对比 */
.compare-wrap{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--surface);box-shadow:var(--sh-sm);}
table.compare{width:100%;border-collapse:separate;border-spacing:0;font-size:15px;}
table.compare th,table.compare td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line);}
table.compare thead th{background:var(--ink);color:#fff;font-weight:600;font-size:14px;letter-spacing:.02em;}
table.compare thead th.recommend{position:relative;background:var(--ink-2);}
table.compare thead th.recommend::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--accent);}
table.compare tbody tr:nth-child(odd){background:#FAF9F6;}
table.compare tbody tr:hover{background:rgba(15,107,92,.05);}
table.compare tbody th{font-weight:600;color:var(--ink);width:26%;}
table.compare td{color:var(--body);}
table.compare td.col-hl{background:rgba(232,84,43,.045);}
.check{color:var(--trust);font-weight:700;}
.cross{color:var(--muted);}
.compare-cards{display:none;}

/* 等级亮点 */
.sticky-note{position:sticky;top:96px;}
.rank-list{border-top:1px solid var(--line);}
.rank-item{display:flex;gap:28px;padding:32px 0;border-bottom:1px solid var(--line);transition:background 240ms var(--ease);}
.rank-item:hover{background:rgba(255,255,255,.6);}
.rank-index{font-size:44px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.4px var(--line);flex-shrink:0;font-variant-numeric:tabular-nums;transition:all 240ms var(--ease);}
.rank-item:hover .rank-index{-webkit-text-stroke:1.4px var(--accent);}
.rank-body h3{margin-bottom:8px;}
.rank-body p{max-width:56ch;}

/* 专属内容轨道 */
.rail{display:flex;gap:24px;overflow-x:auto;padding:8px 0 24px;scroll-snap-type:x mandatory;scrollbar-width:none;}
.rail::-webkit-scrollbar{display:none;}
.rail-card{flex:0 0 320px;scroll-snap-align:start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);transition:all 240ms var(--ease);}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);}
.rail-media{aspect-ratio:16/10;overflow:hidden;background:#ded8cc;}
.rail-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease);}
.rail-card:hover .rail-media img{transform:scale(1.04);}
.rail-body{padding:20px;}
.rail-body h3{font-size:17px;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rail-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);}
.lock{font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:6px;}

/* 最新信息 */
.filter-tabs{display:flex;flex-wrap:wrap;gap:8px;}
.filter-tabs span{padding:6px 14px;border-radius:999px;border:1px solid var(--line);font-size:13px;color:var(--muted);background:var(--surface);}
.filter-tabs span.is-on{background:var(--ink);color:#fff;border-color:var(--ink);}
.news-list{display:flex;flex-direction:column;gap:20px;}
.news-item{display:flex;gap:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-sm);transition:all 240ms var(--ease);}
.news-item:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);}
.news-media{flex:0 0 260px;aspect-ratio:16/10;border-radius:var(--r-img);overflow:hidden;background:#ded8cc;}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease);}
.news-item:hover .news-media img{transform:scale(1.04);}
.news-body{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;}
.news-title{font-size:20px;margin:12px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a{color:var(--ink);}
.news-title a:hover{color:var(--accent);}
.news-summary{font-size:15px;color:var(--body);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:auto;padding-top:16px;font-size:13px;color:var(--muted);}
.news-empty{border:1px dashed var(--line);border-radius:var(--r-card);padding:56px 24px;text-align:center;background:var(--surface);}
.empty-mark{width:56px;height:56px;margin:0 auto 16px;border-radius:14px;background:linear-gradient(135deg,rgba(232,84,43,.16),rgba(15,107,92,.16));position:relative;}
.empty-mark::after{content:"";position:absolute;inset:14px;border:2px solid rgba(20,23,26,.18);border-radius:8px;}

/* FAQ */
.faq-wrap{max-width:800px;}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--line);}
.accordion-item:first-child{border-top:1px solid var(--line);}
.accordion-title{border:0;background:transparent;padding:22px 48px 22px 0;font-size:17px;font-weight:600;color:var(--ink);position:relative;transition:color 160ms var(--ease);}
.accordion-title:hover,.accordion-title:focus{background:transparent;color:var(--accent);}
.accordion-title::before{content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);font-size:22px;font-weight:400;color:var(--accent);line-height:1;transition:transform 240ms var(--ease);}
.accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(45deg);}
.accordion-content{background:transparent;border:0;padding:0 48px 22px 0;color:var(--body);font-size:15px;}

/* CTA 带 */
.cta-band{background:var(--ink);color:#F6F4EF;position:relative;overflow:hidden;}
.cta-band::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(246,244,239,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(246,244,239,.06) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;padding:72px 0;}
.cta-band h2{color:#F6F4EF;}
.cta-band p{color:rgba(246,244,239,.72);margin-top:12px;max-width:52ch;}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(246,244,239,.72);padding:72px 0 0;}
.footer-grid{display:flex;flex-wrap:wrap;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(246,244,239,.14);}
.footer-col{flex:1 1 200px;min-width:0;}
.footer-col.brand{flex:1 1 320px;}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-logo .logo-mark{background:linear-gradient(135deg,#F6F4EF 0 50%,var(--accent) 50% 100%);}
.footer-logo .logo-text{color:#F6F4EF;font-size:18px;}
.footer-col h4{color:#F6F4EF;font-size:14px;letter-spacing:.06em;margin-bottom:18px;}
.footer-col a{display:block;color:rgba(246,244,239,.72);padding:6px 0;font-size:14px;}
.footer-col a:hover{color:var(--accent);}
.footer-col p{font-size:14px;line-height:1.9;}
.footer-legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding:24px 0 32px;font-size:13px;color:rgba(246,244,239,.55);}

/* 移动底部 Tab */
.tabbar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:950;background:rgba(246,244,239,.97);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);}
.tabbar-inner{display:flex;}
.tabbar a{flex:1 1 0;display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 0 7px;font-size:11px;color:var(--muted);position:relative;}
.tabbar a i{font-size:19px;}
.tabbar a::before{content:"";position:absolute;top:0;left:22%;right:22%;height:2px;background:var(--accent);transform:scaleX(0);transition:transform 240ms var(--ease);}
.tabbar a.is-active{color:var(--accent);}
.tabbar a.is-active::before{transform:scaleX(1);}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* 断点 */
@media (max-width:1279px){
  .section{padding:80px 0;}
  .stat{padding:28px 18px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .header-actions .link-arrow{display:none;}
  .menu-toggle{display:inline-flex;}
  .hero{padding-top:48px;}
  .float-card{position:relative;left:auto;bottom:auto;width:100%;margin-top:20px;}
  .stats{margin-top:56px;}
  .section{padding:64px 0;}
  .sticky-note{position:relative;top:0;}
  .news-item{flex-direction:column;}
  .news-media{flex:0 0 auto;width:100%;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  body{font-size:15.5px;padding-bottom:calc(62px + env(safe-area-inset-bottom));}
  .tabbar{display:block;}
  .header-actions .btn-ghost{display:none;}
  .section{padding:56px 0;}
  .sec-head{margin-bottom:28px;}
  .hero-cta .btn{flex:1 1 auto;}
  .stat{flex:1 1 50%;border-bottom:1px solid var(--line);}
  .stat:nth-child(2n){border-right:0;}
  .compare-wrap{display:none;}
  .compare-cards{display:flex;flex-direction:column;gap:20px;}
  .compare-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-sm);}
  .compare-card.is-rec{border-top:3px solid var(--accent);}
  .compare-card h3{margin:10px 0 16px;}
  .compare-card .row{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;}
  .compare-card .row:last-child{border-bottom:0;}
  .rail-card{flex:0 0 78%;}
  .rank-item{gap:18px;padding:24px 0;}
  .rank-index{font-size:34px;}
  .cta-inner{padding:56px 0;}
  .cta-inner .btn{width:100%;}
  .footer-legal{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#14171A;
  --ink-2:#2B3033;
  --body:#4A5154;
  --muted:#8A9198;
  --bg:#F6F4EF;
  --bg-alt:#ECE8DF;
  --surface:#FFFFFF;
  --line:#E0DCD3;
  --accent:#E8542B;
  --accent-dark:#C43F1B;
  --trust:#0F6B5C;
  --medal:#B98A3C;
  --danger:#B3261E;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 1px 2px rgba(20,23,26,.04),0 1px 3px rgba(20,23,26,.06);
  --shadow-md:0 6px 18px rgba(20,23,26,.06);
  --shadow-lg:0 18px 40px rgba(20,23,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --z-nav:900;
  --z-tab:950;
  --z-overlay:1000;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);text-align:left;}
p{margin:0 0 1.35em;}
p:last-child{margin-bottom:0;}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;transition:color 160ms var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--body);}
.num,time,.stat-num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;border-top:1px solid var(--line);}
.section.alt{background:var(--bg-alt);}
.section.ink{background:var(--ink);border-top-color:#20262A;}
.section-head{margin-bottom:40px;max-width:760px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--trust);
  text-transform:none;font-weight:600;margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent);display:block;}
h1{font-size:clamp(32px,5.2vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.12;}
h2{font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.25;letter-spacing:-.01em;}
h3{font-size:clamp(20px,2vw,24px);font-weight:600;line-height:1.35;}
h4{font-size:16px;font-weight:600;letter-spacing:.02em;}
.lead{font-size:17px;color:var(--body);max-width:46ch;}
.muted{color:var(--muted);font-size:13px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:var(--z-nav);
  background:rgba(246,244,239,.94);
  border-bottom:1px solid var(--line);
  transition:height 240ms var(--ease),background 240ms var(--ease);
}
.header-inner{display:flex;align-items:center;gap:32px;height:72px;}
.site-header.is-scrolled .header-inner{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}
.logo-mark{
  width:20px;height:20px;border-radius:5px;position:relative;flex:none;
  background:var(--ink);
}
.logo-mark::after{
  content:"";position:absolute;inset:5px 5px auto 5px;height:3px;border-radius:2px;background:var(--accent);
}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform 160ms var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:20px;}
.text-link{font-size:14px;color:var(--trust);display:inline-flex;align-items:center;gap:6px;position:relative;}
.text-link::after{
  content:"";position:absolute;left:0;right:18px;bottom:-4px;height:1px;background:var(--trust);
  transform:scaleX(0);transform-origin:left;transition:transform 160ms var(--ease);
}
.text-link:hover::after{transform:scaleX(1);}
.text-link .arrow{transition:transform 160ms var(--ease);}
.text-link:hover .arrow{transform:translateX(4px);}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);align-items:center;justify-content:center;background:var(--surface);}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:var(--surface);padding:12px 0 20px;}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{display:block;padding:13px 0;font-size:16px;color:var(--ink-2);border-bottom:1px solid var(--line);}
.mobile-drawer a:last-child{border-bottom:0;}

/* ---------- breadcrumb ---------- */
.crumbs{padding:20px 0 0;font-size:13px;color:var(--muted);}
.crumbs a:hover{color:var(--accent);}
.crumbs .sep{margin:0 8px;color:var(--line);}
.crumbs .current{color:var(--ink);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:44px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background 160ms var(--ease),color 160ms var(--ease),border-color 160ms var(--ease),transform 160ms var(--ease);
}
.btn .arrow{transition:transform 160ms var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--accent-dark);color:#fff;}
.btn-dark{background:var(--ink);color:#FFF8F3;}
.btn-dark:hover{background:var(--accent);color:#fff;}
.btn-ghost{background:var(--surface);color:var(--trust);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--trust);background:#F1F6F4;}
.btn-light{background:#FFF8F3;color:var(--ink);}
.btn-light:hover{background:var(--accent);color:#fff;}
.btn-row{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;font-size:12px;padding:5px 12px;font-weight:600;letter-spacing:.02em;}
.badge-cat{background:rgba(15,107,92,.08);color:var(--trust);}
.badge-medal{background:rgba(185,138,60,.14);color:#8C6526;}
.badge-time{background:#ECE8DF;color:var(--body);}

/* ---------- hero ---------- */
.page-hero{padding:56px 0 88px;}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;}
.hero-copy h1{margin-bottom:20px;}
.hero-copy .lead{margin-bottom:0;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-points .badge{background:var(--surface);border:1px solid var(--line);color:var(--body);}
.hero-media{position:relative;}
.media{position:relative;overflow:hidden;border-radius:var(--radius-img);background:var(--bg-alt);}
.media img{width:100%;height:100%;object-fit:cover;}
.hero-media .media{aspect-ratio:4/3;box-shadow:var(--shadow-md);}
.hero-float{
  position:absolute;left:-24px;bottom:-28px;width:min(280px,80%);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-lg);padding:20px 22px;
}
.hero-float h4{margin-bottom:12px;font-size:14px;color:var(--muted);letter-spacing:.06em;font-weight:600;}
.hero-float ol{counter-reset:hs;}
.hero-float li{display:flex;gap:12px;align-items:flex-start;padding:7px 0;font-size:14px;color:var(--ink-2);}
.hero-float li::before{
  counter-increment:hs;content:counter(hs,decimal-leading-zero);
  font-size:12px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;line-height:1.9;
}
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:64px;border-top:1px solid var(--line);}
.stat{padding:28px 24px 4px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat-num{font-size:clamp(28px,3.4vw,44px);font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:-.02em;}
.stat-num small{font-size:15px;font-weight:600;margin-left:6px;color:var(--body);}
.stat p{margin:8px 0 0;font-size:13px;color:var(--muted);}

/* ---------- anchor nav ---------- */
.anchor-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface);}
.anchor-bar ul{display:flex;flex-wrap:wrap;gap:8px;padding:14px 0;}
.anchor-bar a{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
  font-size:13px;color:var(--body);border:1px solid var(--line);background:var(--bg);
  transition:all 160ms var(--ease);
}
.anchor-bar a:hover{border-color:var(--accent);color:var(--accent);background:#fff;}

/* ---------- alternating rows ---------- */
.rows{border-top:1px solid var(--line);}
.row-item{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;padding:56px 0;border-bottom:1px solid var(--line);}
.row-item.reverse{grid-template-columns:7fr 5fr;}
.row-item.reverse .row-media{order:2;}
.row-media .media{aspect-ratio:16/11;box-shadow:var(--shadow-sm);}
.row-body .idx{
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.08em;
  font-variant-numeric:tabular-nums;margin-bottom:12px;display:block;
}
.row-body h3{margin-bottom:14px;}
.row-body p{max-width:46ch;}
.row-list{margin-top:20px;display:grid;gap:10px;}
.row-list li{position:relative;padding-left:18px;font-size:15px;color:var(--body);}
.row-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--trust);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);margin-top:8px;}
.step{padding:36px 28px 36px 0;border-right:1px solid var(--line);}
.step:last-child{border-right:0;padding-right:0;}
.step .big{
  font-size:56px;font-weight:800;line-height:1;letter-spacing:-.03em;
  color:transparent;-webkit-text-stroke:1.4px var(--line);display:block;margin-bottom:20px;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:19px;margin-bottom:10px;}
.step p{font-size:14.5px;color:var(--body);}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:8fr 4fr;gap:56px;align-items:start;}
.scene-list{display:grid;gap:0;border-top:1px solid var(--line);}
.scene-item{padding:28px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:52px 1fr;gap:20px;}
.scene-item .n{font-size:15px;font-weight:700;color:var(--trust);font-variant-numeric:tabular-nums;padding-top:4px;}
.scene-item h4{font-size:18px;margin-bottom:8px;}
.scene-item p{font-size:15px;margin:0;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);padding:28px;position:sticky;top:96px;
}
.side-card h3{font-size:19px;margin-bottom:16px;}
.side-card .kv{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px;}
.side-card .kv:last-of-type{border-bottom:0;}
.side-card .kv span:first-child{color:var(--muted);}
.side-card .kv span:last-child{color:var(--ink);font-weight:600;}
.side-card .btn{width:100%;margin-top:22px;}

/* ---------- faq ---------- */
.faq-wrap{max-width:800px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--accent);line-height:1;
  transition:transform 240ms var(--ease);flex:none;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item .answer{padding:0 0 24px;font-size:15px;color:var(--body);max-width:64ch;}

/* ---------- cta ---------- */
.cta-band{position:relative;overflow:hidden;}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(to right,#fff 1px,transparent 1px),linear-gradient(to bottom,#fff 1px,transparent 1px);
  background-size:48px 48px;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.cta-inner h2{color:#FFF8F3;}
.cta-inner p{color:#C9C3BA;margin-top:16px;max-width:44ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:flex-end;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#B9B3AB;padding:72px 0 32px;font-size:14.5px;}
.footer-grid{display:grid;grid-template-columns:4fr 3fr 3fr 2fr;gap:40px;}
.footer-logo{display:flex;align-items:center;gap:10px;color:#FFF8F3;font-weight:800;font-size:17px;margin-bottom:16px;}
.footer-logo .logo-mark{background:#FFF8F3;}
.footer-col h4{color:#FFF8F3;font-size:14px;margin-bottom:18px;letter-spacing:.06em;}
.footer-col a{display:block;padding:7px 0;color:#B9B3AB;}
.footer-col a:hover{color:var(--accent);}
.footer-col p{color:#8E8880;font-size:14px;margin:0;}
.footer-legal{
  margin-top:56px;padding-top:24px;border-top:1px solid #2B3033;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:#7E7973;font-size:13px;
}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:var(--z-tab);
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  padding:6px 0 calc(6px + env(safe-area-inset-bottom));
}
.mobile-tabbar ul{display:grid;grid-template-columns:repeat(4,1fr);}
.mobile-tabbar a{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:6px 0;font-size:11px;color:var(--muted);
}
.mobile-tabbar svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.mobile-tabbar a.is-active{color:var(--accent);}
.mobile-tabbar a.is-active::before{content:"";position:absolute;top:-7px;width:24px;height:2px;background:var(--accent);border-radius:2px;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 22px;}
  .section{padding:80px 0;}
  .hero-grid,.row-item,.row-item.reverse,.scene-grid,.cta-inner{gap:40px;}
  .main-nav{gap:20px;}
}
@media (max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-actions{gap:12px;margin-left:auto;}
  .header-actions .text-link{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:48px;}
  .hero-media{order:-1;}
  .hero-float{left:16px;bottom:-24px;}
  .row-item,.row-item.reverse{grid-template-columns:1fr;gap:28px;}
  .row-item.reverse .row-media{order:0;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:28px 0;}
  .step:nth-child(odd){padding-right:24px;}
  .scene-grid{grid-template-columns:1fr;}
  .side-card{position:static;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  body{padding-bottom:calc(72px + env(safe-area-inset-bottom));}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .page-hero{padding:32px 0 56px;}
  .brand .logo-text{font-size:15px;}
  .hero-float{position:static;width:100%;left:auto;bottom:auto;margin-top:20px;box-shadow:var(--shadow-sm);}
  .stat-strip{grid-template-columns:1fr 1fr;margin-top:44px;}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding:20px 0;}
  .stat:nth-child(odd){padding-right:16px;}
  .steps{grid-template-columns:1fr;}
  .step:nth-child(odd){padding-right:0;}
  .step .big{font-size:44px;}
  .scene-item{grid-template-columns:1fr;gap:6px;}
  .faq-item summary{font-size:16px;padding:18px 0;}
  .btn{height:48px;width:100%;}
  .btn-row{flex-direction:column;}
  .mobile-tabbar{display:block;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-legal{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink:#14171A;
  --ink-2:#2B3033;
  --body:#4A5154;
  --muted:#8A9198;
  --bg:#F6F4EF;
  --bg-alt:#ECE8DF;
  --surface:#FFFFFF;
  --line:#E0DCD3;
  --accent:#E8542B;
  --accent-dark:#C43F1B;
  --trust:#0F6B5C;
  --medal:#B98A3C;
  --danger:#B3261E;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(20,23,26,.04),0 1px 3px rgba(20,23,26,.06);
  --sh-md:0 6px 18px rgba(20,23,26,.06);
  --sh-lg:0 18px 40px rgba(20,23,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --z-nav:900;
  --z-tab:950;
  --z-overlay:1000;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--ink);text-decoration:none;transition:color 160ms var(--ease)}
a:hover{color:var(--accent)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.25}
p{margin:0 0 1.35em}
ul,ol{margin:0 0 1.35em;padding-left:1.15em}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums}

/* 阅读进度条 */
.reading-progress{position:fixed;top:0;left:0;width:100%;height:2px;background:transparent;z-index:var(--z-overlay)}
.reading-progress span{display:block;height:100%;width:0;background:var(--accent);transition:width 80ms linear}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:var(--z-nav);
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background 240ms var(--ease),box-shadow 240ms var(--ease);
}
.site-header.is-scrolled{background:rgba(246,244,239,.96);border-bottom-color:var(--line);box-shadow:var(--sh-sm)}
.header-inner{display:flex;align-items:center;gap:32px;height:var(--nav-h);transition:height 240ms var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:20px;height:20px;border-radius:5px;background:linear-gradient(135deg,var(--accent) 0 50%,var(--trust) 50% 100%);position:relative;flex:0 0 auto}
.logo-mark::after{content:"";position:absolute;inset:6px;border:1px solid rgba(255,255,255,.85);border-radius:2px}
.logo-text{font-weight:800;font-size:17px;letter-spacing:-.01em;color:#F6F4EF;white-space:nowrap}
.site-header.is-scrolled .logo-text{color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:8px;margin-left:8px;flex:1 1 auto}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:rgba(246,244,239,.78);
  border-radius:8px;white-space:nowrap;
}
.site-header.is-scrolled .nav-link{color:var(--body)}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform 240ms var(--ease);
}
.nav-link:hover{color:#fff}
.site-header.is-scrolled .nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff}
.site-header.is-scrolled .nav-link.is-active{color:var(--ink)}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto}
.header-link{font-size:14px;color:rgba(246,244,239,.78)}
.site-header.is-scrolled .header-link{color:var(--body)}
.header-link:hover{color:var(--accent)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border:1px solid transparent;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background 160ms var(--ease),color 160ms var(--ease),border-color 160ms var(--ease),transform 160ms var(--ease),box-shadow 160ms var(--ease);
}
.btn svg{transition:transform 160ms var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);color:#fff;box-shadow:var(--sh-md)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--accent);color:#fff;box-shadow:var(--sh-md)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#F6F4EF}
.btn-ghost:hover{border-color:var(--accent);color:#fff}
.btn-outline{background:var(--surface);border-color:var(--line);color:var(--trust)}
.btn-outline:hover{border-color:var(--trust);background:#fff;color:var(--trust)}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.24);border-radius:var(--r-btn);background:transparent;align-items:center;justify-content:center;cursor:pointer}
.site-header.is-scrolled .menu-toggle{border-color:var(--line)}
.menu-toggle span{display:block;width:18px;height:2px;background:#F6F4EF;position:relative}
.site-header.is-scrolled .menu-toggle span{background:var(--ink)}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:inherit}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

/* 抽屉 */
.drawer-backdrop{position:fixed;inset:0;background:rgba(20,23,26,.5);opacity:0;pointer-events:none;transition:opacity 240ms var(--ease);z-index:var(--z-overlay)}
.drawer{position:fixed;top:0;right:0;height:100%;width:280px;max-width:86vw;background:var(--surface);z-index:var(--z-overlay);transform:translateX(102%);transition:transform 240ms var(--ease);padding:24px 20px;overflow-y:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-head strong{font-size:16px;color:var(--ink)}
.drawer-close{width:36px;height:36px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--ink)}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{padding:12px 10px;border-radius:10px;font-size:15px;color:var(--ink-2);border-bottom:1px solid var(--line)}
.drawer nav a.is-active{color:var(--accent);border-bottom-color:var(--accent)}
body.drawer-open .drawer{transform:translateX(0)}
body.drawer-open .drawer-backdrop{opacity:1;pointer-events:auto}

/* 面包屑 */
.breadcrumb{padding:20px 0 0;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{margin:0 8px;color:var(--line)}
.breadcrumb .current{color:var(--ink)}

/* 文章头 */
.article-hero{padding:28px 0 40px;border-bottom:1px solid var(--line);position:relative}
.article-hero::before{
  content:"";position:absolute;inset:0 0 auto auto;width:320px;height:180px;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.09;border-radius:0 0 0 120px;pointer-events:none;
}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;letter-spacing:.02em}
.badge-trust{background:rgba(15,107,92,.10);color:var(--trust)}
.badge-medal{background:rgba(185,138,60,.14);color:var(--medal)}
.badge-time{background:var(--bg-alt);color:var(--muted)}
.article-title{
  font-size:clamp(30px,4.4vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.14;
  margin:18px 0 20px;max-width:22em;
}
.article-lead{
  max-width:760px;font-size:17px;color:var(--body);border-left:3px solid var(--accent);
  padding-left:16px;margin-bottom:24px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--muted)}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.meta-sep{width:1px;height:12px;background:var(--line)}

/* 文章布局 */
.article-layout{display:grid;grid-template-columns:minmax(0,760px) minmax(0,1fr);gap:56px;padding:56px 0 96px;align-items:start}
.article-body{font-size:16px;line-height:1.9;color:var(--body);max-width:760px;overflow-wrap:break-word;word-break:break-word}
.article-body p{margin:0 0 1.35em}
.article-body h2{
  position:relative;font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--ink);
  margin:48px 0 20px;padding-left:14px;line-height:1.3;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;background:var(--accent);border-radius:2px}
.article-body h3{font-size:20px;font-weight:600;color:var(--ink);margin:32px 0 14px}
.article-body h4{font-size:16px;font-weight:600;color:var(--ink-2);letter-spacing:.02em;margin:24px 0 12px}
.article-body a{color:var(--trust);border-bottom:1px solid rgba(15,107,92,.3)}
.article-body a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.article-body ul{list-style:none;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;background:var(--trust);border-radius:2px}
.article-body ol{padding-left:1.4em}
.article-body ol li{margin-bottom:10px}
.article-body blockquote{
  margin:32px 0;padding:20px 24px;background:var(--bg-alt);border-left:3px solid var(--accent);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--ink-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:28px auto;box-shadow:var(--sh-sm)}
.article-body figure{margin:28px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:28px 0;font-size:15px;display:block;overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-card)}
.article-body thead th{background:var(--ink-2);color:#fff;font-weight:600;text-align:left;padding:12px 16px;white-space:nowrap}
.article-body tbody td{padding:12px 16px;border-top:1px solid var(--line);background:var(--surface)}
.article-body tbody tr:nth-child(even) td{background:#FAF9F6}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.article-body code{background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:14px}

/* 侧栏目录 */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-sm)}
.side-card h4{font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:600;margin-bottom:14px}
.toc{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow-y:auto}
.toc a{font-size:14px;color:var(--body);padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;transition:all 160ms var(--ease)}
.toc a:hover{color:var(--ink);background:var(--bg)}
.toc a.is-active{color:var(--accent);border-left-color:var(--accent);background:rgba(232,84,43,.06)}
.toc a.depth-3{padding-left:22px;font-size:13px;color:var(--muted)}
.side-points{display:flex;flex-direction:column;gap:12px}
.side-points div{display:flex;gap:10px;font-size:14px;color:var(--body)}
.side-points strong{color:var(--ink);font-weight:600}
.dot{width:8px;height:8px;border-radius:50%;background:var(--trust);margin-top:.62em;flex:0 0 auto}

/* 空态 */
.empty-state{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:56px 32px;text-align:center;box-shadow:var(--sh-sm);
}
.empty-state .empty-shape{
  width:88px;height:88px;margin:0 auto 22px;border-radius:20px;
  background:linear-gradient(135deg,rgba(232,84,43,.14),rgba(15,107,92,.14));
  display:flex;align-items:center;justify-content:center;
}
.empty-state .empty-shape span{width:34px;height:34px;border-radius:8px;background:var(--accent);opacity:.85}
.empty-state h2{font-size:24px;margin-bottom:12px}
.empty-state p{max-width:520px;margin:0 auto 24px;color:var(--body)}

/* 标签、翻页、推荐 */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:48px 0 0;padding-top:24px;border-top:1px solid var(--line)}
.tag{padding:6px 14px;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:13px;color:var(--body)}
.tag:hover{border-color:var(--trust);color:var(--trust)}
.section-divider{border-top:1px solid var(--line);margin:64px 0 40px}
.block-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:28px}
.block-title h2{font-size:clamp(20px,2.2vw,26px)}
.block-title .text-link{font-size:14px;color:var(--trust);font-weight:600}
.pager-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pager-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(--sh-sm);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease),border-color 240ms var(--ease);
}
.pager-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--bg-alt)}
.pager-card .media{width:88px;height:66px;flex:0 0 auto;border-radius:10px;overflow:hidden;background:var(--bg-alt)}
.pager-card .media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.pager-card .meta{font-size:12px;color:var(--muted);letter-spacing:.04em}
.pager-card .ttl{font-size:15px;font-weight:600;color:var(--ink);margin-top:4px}
.pager-card--next{flex-direction:row-reverse;text-align:right}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.rel-card .media{aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
.rel-card .media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 420ms var(--ease)}
.rel-card:hover .media img{transform:scale(1.04)}
.rel-card .body{padding:18px 20px 22px}
.rel-card .badge{margin-bottom:12px}
.rel-card h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-card p{font-size:14px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* CTA 带 */
.cta-band{background:var(--ink);color:#F6F4EF;position:relative;overflow:hidden;margin-top:96px}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(246,244,239,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(246,244,239,.05) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;padding:72px 0}
.cta-inner h2{color:#F6F4EF;font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.cta-inner p{color:rgba(246,244,239,.76);margin:0;max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;cursor:pointer;list-style:none;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--accent);line-height:1;
  transition:transform 240ms var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .answer{padding:0 0 22px;font-size:15px;color:var(--body);max-width:44em}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(246,244,239,.72);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(246,244,239,.12)}
.footer-col h4{color:#F6F4EF;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col a{display:block;color:rgba(246,244,239,.72);font-size:14px;padding:5px 0;border-bottom:1px solid transparent;transition:color 160ms var(--ease),border-color 160ms var(--ease)}
.footer-col a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.footer-col p{font-size:14px;line-height:1.8;margin:0}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo .logo-text{color:#F6F4EF;font-size:17px}
.footer-legal{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-top:22px;font-size:13px;color:rgba(246,244,239,.5)}

/* 移动底部 Tab */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:var(--z-tab);
  background:rgba(255,255,255,.98);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar .tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:58px;font-size:11px;color:var(--muted);position:relative;
}
.mobile-tabbar .tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6}
.mobile-tabbar .tab-item.is-active{color:var(--accent)}
.mobile-tabbar .tab-item.is-active::before{content:"";position:absolute;top:0;left:28%;right:28%;height:2px;background:var(--accent);border-radius:0 0 2px 2px}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (max-width:1023px){
  .container{padding:0 20px}
  .main-nav{display:none}
  .header-link{display:none}
  .menu-toggle{display:flex}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px;padding:40px 0 72px}
  .article-side{position:static}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr;gap:28px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:15.5px;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
  .mobile-tabbar{display:flex}
  .header-inner{gap:16px}
  .logo-text{font-size:15px}
  .article-title{font-size:clamp(26px,7.4vw,34px)}
  .article-lead{font-size:15.5px}
  .article-body{font-size:15.5px}
  .article-body h2{margin-top:36px}
  .pager-grid,.rel-grid{grid-template-columns:1fr}
  .pager-card--next{flex-direction:row;text-align:left}
  .cta-inner{padding:56px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-legal{flex-direction:column}
  .article-hero::before{display:none}
}
@media (max-width:520px){
  .block-title{flex-direction:column;align-items:flex-start;gap:8px}
  .btn{width:100%}
  .header-actions .btn{width:auto;min-height:40px;padding:0 16px;font-size:14px}
  .cta-actions{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --ink:#14171A;
  --ink-2:#2B3033;
  --body:#4A5154;
  --muted:#8A9198;
  --bg:#F6F4EF;
  --bg-alt:#ECE8DF;
  --surface:#FFFFFF;
  --line:#E0DCD3;
  --accent:#E8542B;
  --accent-dark:#C43F1B;
  --trust:#0F6B5C;
  --medal:#B98A3C;
  --danger:#B3261E;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-sm:0 1px 2px rgba(20,23,26,.04),0 1px 3px rgba(20,23,26,.06);
  --sh-md:0 6px 18px rgba(20,23,26,.06);
  --sh-lg:0 18px 40px rgba(20,23,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --font:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3,h4{color:var(--ink);font-weight:700;line-height:1.25}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
::selection{background:rgba(232,84,43,.18)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:900;
  background:rgba(246,244,239,.96);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 1px 0 rgba(20,23,26,.04),0 8px 24px rgba(20,23,26,.05)}
.header-inner{display:flex;align-items:center;gap:28px;height:var(--nav-h);transition:height .24s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em;color:var(--ink);font-size:17px;white-space:nowrap}
.logo-mark{position:relative;width:20px;height:20px;flex:0 0 20px}
.logo-mark::before{content:"";position:absolute;inset:0;border:2px solid var(--ink);border-radius:7px 2px 7px 2px}
.logo-mark::after{content:"";position:absolute;left:4px;top:9px;width:14px;height:2px;background:var(--accent);transform:rotate(-42deg);transform-origin:left center}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--ink-2);transition:color .16s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:600}
.header-actions{display:flex;align-items:center;gap:14px}
.link-ghost{font-size:15px;color:var(--ink-2);transition:color .16s var(--ease)}
.link-ghost:hover{color:var(--accent)}
.menu-toggle{
  display:none;align-items:center;gap:8px;
  height:40px;padding:0 14px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);color:var(--ink);font-size:14px;cursor:pointer;
}
.menu-toggle i{font-size:14px}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:var(--surface);
  padding:8px 0 18px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{
  display:block;padding:13px 24px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a:last-of-type{border-bottom:0}
.mobile-drawer a.is-active{color:var(--accent);font-weight:600}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:background .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),transform .16s var(--ease),box-shadow .24s var(--ease);
}
.btn .arrow{transition:transform .16s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-ink{background:var(--ink);color:#F6F4EF}
.btn-ink:hover{background:var(--accent);color:#fff}
.btn-ghost{background:var(--surface);color:var(--trust);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--trust);background:#fff}
.btn-text{height:auto;padding:0;color:var(--ink);font-weight:600;background:none;border:0;position:relative}
.btn-text::after{
  content:"";position:absolute;left:0;right:16px;bottom:-3px;height:1px;background:var(--accent);
  transform:scaleX(0);transform-origin:left center;transition:transform .24s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1)}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:20px 0 0;font-size:13px;color:var(--muted);
}
.breadcrumb a{color:var(--muted);transition:color .16s var(--ease)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ============ 页头 ============ */
.page-head{padding:36px 0 0}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--trust);
  background:rgba(15,107,92,.08);border-radius:999px;padding:5px 12px;margin-bottom:20px;
}
.page-head h1{
  font-size:clamp(30px,4.4vw,52px);
  font-weight:800;letter-spacing:-.02em;line-height:1.14;margin-bottom:20px;
  max-width:16em;
}
.lede{font-size:17px;color:var(--body);max-width:34em;margin-bottom:26px}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.head-media{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:var(--surface);box-shadow:var(--sh-md);
}
.head-media .media{position:relative;aspect-ratio:16/10;overflow:hidden}
.head-media .media img{width:100%;height:100%;object-fit:cover}
.head-media .media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,23,26,0) 45%,rgba(20,23,26,.35) 100%);
}
.head-media .media-cap{
  position:absolute;left:18px;bottom:14px;z-index:2;color:#fff;font-size:13px;letter-spacing:.02em;
}
.head-card-list{padding:18px 20px;display:grid;gap:12px}
.head-card-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2)}
.head-card-list i{color:var(--trust);font-size:13px;margin-top:5px}

/* 锚点条 */
.anchor-bar{
  display:flex;gap:10px;flex-wrap:wrap;
  padding:22px 0 26px;margin-top:8px;border-top:1px solid var(--line);
}
.anchor-bar a{
  font-size:13.5px;color:var(--ink-2);border:1px solid var(--line);border-radius:999px;
  padding:7px 15px;background:var(--surface);transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
  white-space:nowrap;
}
.anchor-bar a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}

/* 数据条 */
.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg)}
.stat-strip .inner{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:26px 8px 26px 0;border-right:1px solid var(--line);padding-left:24px}
.stat:first-child{padding-left:0}
.stat:last-child{border-right:0}
.stat b{
  display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(26px,3vw,40px);font-weight:800;color:var(--ink);line-height:1.1;letter-spacing:-.02em;
}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px}

/* ============ 通用区块 ============ */
.section{padding:96px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:72px 0}
.section-head{max-width:44em;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3.2vw,38px);font-weight:700;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--body)}
.section-head .num{
  display:block;font-family:var(--font-num);font-size:13px;letter-spacing:.14em;color:var(--muted);margin-bottom:12px;
}

/* ============ 主内容 8/4 ============ */
.rule-list{border-top:1px solid var(--line)}
.rule-item{
  padding:34px 0;border-bottom:1px solid var(--line);
  display:grid;grid-template-columns:88px 1fr;gap:20px;scroll-margin-top:110px;
}
.rule-num{
  font-family:var(--font-num);font-size:40px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1px var(--muted);letter-spacing:-.02em;
  padding-top:2px;
}
.rule-item h3{font-size:20px;font-weight:600;margin-bottom:10px;color:var(--ink)}
.rule-item p{font-size:15.5px;line-height:1.8;margin-bottom:12px}
.rule-item p:last-child{margin-bottom:0}
.rule-key{
  display:flex;gap:10px;align-items:flex-start;flex-wrap:wrap;
  font-size:14px;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-btn);
  padding:12px 14px;
}
.rule-key .k{
  color:var(--trust);font-weight:700;font-size:13px;
  background:rgba(15,107,92,.08);border-radius:999px;padding:2px 10px;white-space:nowrap;
}

/* 侧栏 */
.sidebar-sticky{position:sticky;top:100px;display:grid;gap:16px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 20px 18px;box-shadow:var(--sh-sm);
}
.side-card h3{font-size:15px;font-weight:700;margin-bottom:14px;letter-spacing:.02em;color:var(--ink)}
.side-card .toc a{
  display:block;font-size:14px;color:var(--ink-2);padding:8px 0 8px 12px;border-left:2px solid var(--line);
  transition:color .16s var(--ease),border-color .16s var(--ease),padding-left .16s var(--ease);
}
.side-card .toc a:hover{color:var(--accent);border-color:var(--accent);padding-left:16px}
.side-card ul.dot li{
  position:relative;padding-left:16px;font-size:14px;color:var(--body);margin-bottom:12px;line-height:1.7;
}
.side-card ul.dot li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--trust);border-radius:1px;
}
.side-card ul.dot li:last-child{margin-bottom:0}
.side-card--cta{background:var(--ink);border-color:var(--ink);color:#D9D5CC}
.side-card--cta h3{color:#F6F4EF}
.side-card--cta p{font-size:14px;margin-bottom:16px;color:#B9B4AA}
.side-card--cta .btn{width:100%}

/* 对比区 */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 26px;box-shadow:var(--sh-sm);position:relative;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease);
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.compare-card.is-pick{border-top:3px solid var(--accent);background:#FFFDFA}
.compare-card .tag{
  display:inline-block;font-size:12px;letter-spacing:.06em;border-radius:999px;
  padding:4px 12px;margin-bottom:16px;
}
.tag--trust{background:rgba(15,107,92,.08);color:var(--trust)}
.tag--medal{background:rgba(185,138,60,.12);color:var(--medal)}
.compare-card h3{font-size:22px;margin-bottom:8px}
.compare-card .sub{font-size:14px;color:var(--muted);margin-bottom:20px}
.compare-row{
  display:grid;grid-template-columns:auto 1fr;gap:8px 16px;
  padding:11px 0;border-top:1px solid var(--line);font-size:14.5px;
}
.compare-row dt{color:var(--muted);white-space:nowrap}
.compare-row dd{margin:0;color:var(--ink-2)}
.compare-row dd em{font-style:normal;color:var(--trust);font-weight:600}

/* 图文区 */
.media-block .media{
  position:relative;border-radius:var(--r-card);overflow:hidden;aspect-ratio:4/3;
  border:1px solid var(--line);background:var(--bg-alt);
}
.media-block .media img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.media-block:hover .media img{transform:scale(1.03)}
.media-block .media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,23,26,.05),rgba(20,23,26,.28));
}
.check-list{margin-top:22px;display:grid;gap:14px}
.check-list li{display:flex;gap:12px;font-size:15.5px;color:var(--ink-2)}
.check-list i{color:var(--trust);margin-top:6px;font-size:13px}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.flow-step{
  padding:30px 22px 30px 0;border-right:1px solid var(--line);position:relative;
}
.flow-step:last-child{border-right:0}
.flow-step .idx{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;letter-spacing:.14em;color:var(--accent);font-weight:700;margin-bottom:14px;display:block;
}
.flow-step h3{font-size:17px;margin-bottom:10px}
.flow-step p{font-size:14.5px;color:var(--body)}

/* FAQ */
.faq-wrap{max-width:800px}
.faq-item{border-bottom:1px solid var(--line);border-top:0}
.faq-item:first-of-type{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;width:20px;height:20px;flex:0 0 20px;transition:transform .24s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-item[open] summary{color:var(--accent)}
.faq-body{padding:0 40px 24px 0;font-size:15.5px;color:var(--body);animation:fadeIn .24s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* CTA */
.cta-band{
  background:var(--ink);color:#CFCAC0;position:relative;overflow:hidden;
  padding:80px 0;
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(90deg,#fff 1px,transparent 1px),linear-gradient(0deg,#fff 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-band .inner{position:relative;z-index:2;display:grid;grid-template-columns:1.6fr 1fr;gap:40px;align-items:center}
.cta-band h2{color:#F6F4EF;font-size:clamp(24px,3.2vw,36px);margin-bottom:14px}
.cta-band p{color:#B4AFA5;font-size:16px;max-width:34em}
.cta-band .actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}

/* 页脚 */
.site-footer{background:var(--ink);color:#A8A39A;padding:72px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo .logo-mark::before{border-color:#F6F4EF}
.footer-logo .logo-text{color:#F6F4EF;font-weight:800;font-size:16px;letter-spacing:-.01em}
.footer-col h4{color:#F6F4EF;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.04em}
.footer-col p{font-size:13.5px;line-height:1.8;color:#8F8A81;max-width:30em}
.footer-col a{display:block;font-size:13.5px;color:#A8A39A;padding:6px 0;transition:color .16s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-legal{
  border-top:1px solid rgba(246,244,239,.12);padding:22px 0 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#77726A;
}

/* 移动底部 Tab */
.mobile-tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:950;display:none;
  background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs a{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:9px 0 7px;font-size:11px;color:var(--muted);position:relative;
}
.mobile-tabs a i{font-size:17px}
.mobile-tabs a.is-active{color:var(--accent)}
.mobile-tabs a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:2px;background:var(--accent);border-radius:2px;
}

/* 入场 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .section{padding:84px 0}
  .rule-item{grid-template-columns:72px 1fr}
  .rule-num{font-size:34px}
}
@media (max-width:1023px){
  .main-nav{gap:18px}
  .nav-link{font-size:14px}
  .link-ghost{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-strip .inner{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat{border-bottom:1px solid var(--line);padding-left:0}
  .stat:nth-child(3),.stat:nth-child(4){border-bottom:0}
  .flow{grid-template-columns:repeat(2,1fr)}
  .flow-step:nth-child(2){border-right:0}
  .flow-step:nth-child(1),.flow-step:nth-child(2){border-bottom:1px solid var(--line)}
  .cta-band .inner{grid-template-columns:1fr}
  .cta-band .actions{justify-content:flex-start}
}
@media (max-width:900px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .header-actions .btn{padding:0 16px}
}
@media (max-width:768px){
  body{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
  .mobile-tabs{display:flex}
  .container{padding:0 20px}
  .section,.section--tight{padding:56px 0}
  .page-head{padding:26px 0 0}
  .page-head h1{font-size:clamp(26px,7vw,34px);max-width:none}
  .lede{font-size:15.5px}
  .head-actions .btn{width:100%}
  .breadcrumb{padding-top:16px}
  .rule-item{grid-template-columns:1fr;gap:10px;padding:26px 0}
  .rule-num{font-size:32px}
  .rule-item h3{font-size:18px}
  .sidebar-sticky{position:static}
  .compare-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .flow-step{border-right:0;border-bottom:1px solid var(--line);padding:24px 0}
  .flow-step:last-child{border-bottom:0}
  .faq-item summary{font-size:15.5px;padding:18px 0}
  .faq-body{padding-right:0}
  .cta-band{padding:56px 0}
  .cta-band .actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .site-footer{padding-top:52px}
  .footer-legal{flex-direction:column;gap:8px}
  .btn{height:48px}
}
@media (max-width:520px){
  .stat-strip .inner{grid-template-columns:1fr}
  .stat{border-right:0}
  .stat:nth-child(3){border-bottom:1px solid var(--line)}
  .head-card-list{padding:16px}
  .anchor-bar{gap:8px}
  .anchor-bar a{font-size:12.5px;padding:6px 12px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important;
  }
  .reveal{opacity:1!important;transform:none!important}
}

/* roulang page: category3 */
:root{
  --ink:#14171A;
  --ink-2:#2B3033;
  --body-c:#4A5154;
  --muted:#8A9198;
  --bg:#F6F4EF;
  --bg-alt:#ECE8DF;
  --surface:#FFFFFF;
  --line:#E0DCD3;
  --accent:#E8542B;
  --accent-dark:#C43F1B;
  --trust:#0F6B5C;
  --medal:#B98A3C;
  --danger:#B3261E;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --shadow-sm:0 1px 2px rgba(20,23,26,.04),0 1px 3px rgba(20,23,26,.06);
  --shadow-md:0 6px 18px rgba(20,23,26,.06);
  --shadow-lg:0 18px 40px rgba(20,23,26,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --z-nav:900;
  --z-tab:950;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body-c);
  background:var(--bg);
  overflow-x:hidden;
  text-align:left;
}
img{max-width:100%;display:block;border:0}
a{color:var(--trust);text-decoration:none;transition:color 160ms var(--ease)}
a:hover{color:var(--accent)}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;line-height:1.28}
p{margin:0 0 1.35em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.num,.metric-num,.spec-num{font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 栅格微调 ---------- */
.grid-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:var(--z-nav);
  background:rgba(246,244,239,.94);
  border-bottom:1px solid var(--line);
  transition:height 240ms var(--ease),background 240ms var(--ease);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:72px;transition:height 240ms var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;letter-spacing:-0.01em;font-size:19px}
.logo:hover{color:var(--ink)}
.logo-mark{
  width:20px;height:20px;flex:0 0 20px;border-radius:5px;
  background:
    linear-gradient(135deg,var(--accent) 0 45%,transparent 45% 100%),
    var(--ink);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;right:3px;bottom:3px;width:7px;height:7px;
  border:2px solid var(--bg);border-radius:50% 50% 50% 0;
}
.logo-text .lt-short{display:none}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;display:inline-block;padding:8px 14px;font-size:15px;
  font-weight:600;color:var(--ink-2);border-radius:8px;
}
.nav-link:hover{color:var(--accent);background:rgba(232,84,43,.06)}
.nav-link.is-active{color:var(--ink)}
.nav-link.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--accent);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:14px}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);font-size:16px;cursor:pointer;
  transition:border-color 160ms var(--ease),color 160ms var(--ease);
}
.menu-toggle:hover{border-color:var(--accent);color:var(--accent)}

#mobileNav{width:230px;padding:10px;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow-lg);background:#fff}
#mobileNav a{display:block;padding:12px 14px;border-radius:10px;font-size:15px;font-weight:600;color:var(--ink)}
#mobileNav a:hover{background:var(--bg-alt);color:var(--accent)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:background 240ms var(--ease),color 240ms var(--ease),border-color 240ms var(--ease),transform 240ms var(--ease);
  white-space:nowrap;
}
.btn i{transition:transform 240ms var(--ease)}
.btn:hover i{transform:translateX(4px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--accent);color:#fff}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--trust)}
.btn-ghost:hover{border-color:var(--trust);color:var(--trust)}
.btn-line-light{background:transparent;border-color:rgba(246,244,239,.34);color:#F6F4EF}
.btn-line-light:hover{border-color:#F6F4EF;color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;
  color:var(--ink-2);position:relative;
}
.btn-text::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform 240ms var(--ease);
}
.btn-text:hover{color:var(--accent)}
.btn-text:hover::after{transform:scaleX(1)}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{background:var(--bg);border-bottom:1px solid var(--line)}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:14px 0;font-size:13px;color:var(--muted);
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--ink);font-weight:600}

/* ---------- 页面头部 ---------- */
.page-hero{
  background:
    radial-gradient(660px 320px at 88% 6%,rgba(232,84,43,.07),transparent 70%),
    linear-gradient(180deg,var(--bg) 0%,var(--bg) 100%);
  padding:72px 0 64px;
  border-bottom:1px solid var(--line);
}
.hero-row{align-items:center}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.14em;font-weight:700;
  color:var(--trust);background:rgba(15,107,92,.09);
  padding:6px 14px;border-radius:999px;margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(30px,4.6vw,54px);font-weight:800;letter-spacing:-0.02em;
  line-height:1.14;margin-bottom:20px;
}
.lead{font-size:17px;color:var(--body-c);max-width:34em;margin-bottom:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 24px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2)}
.hero-points i{color:var(--trust);font-size:13px}

.hero-media{position:relative;margin:0;padding-bottom:26px}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);
  box-shadow:var(--shadow-md);background:var(--bg-alt);
}
.float-card{
  position:absolute;left:0;bottom:0;width:min(250px,86%);
  background:var(--surface);border-radius:var(--r-card);
  box-shadow:var(--shadow-lg);padding:20px 22px;border:1px solid var(--line);
}
.float-title{display:block;font-size:13px;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
.float-card ol{display:grid;gap:10px}
.float-card li{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--ink)}
.float-card .num{color:var(--accent);font-size:13px;font-weight:800}

.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:56px;padding-top:32px;border-top:1px solid var(--line);
}
.metric-num{
  display:block;font-size:clamp(28px,3.6vw,44px);font-weight:800;
  color:var(--ink);letter-spacing:-0.02em;line-height:1.1;
}
.metric-num small{font-size:.5em;font-weight:700;color:var(--muted);margin-left:2px}
.metric-label{display:block;font-size:13px;color:var(--muted);margin-top:6px;letter-spacing:.04em}

/* ---------- 锚点标签条 ---------- */
.anchor-bar{
  position:sticky;top:60px;z-index:800;
  background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
}
.anchor-inner{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-chip{
  flex:0 0 auto;display:inline-block;padding:8px 18px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--ink-2);
  border:1px solid var(--line);background:var(--surface);
  transition:all 240ms var(--ease);
}
.anchor-chip:hover{border-color:var(--accent);color:var(--accent);background:rgba(232,84,43,.06)}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-index{
  display:block;font-family:Inter,system-ui,sans-serif;font-size:13px;font-weight:700;
  letter-spacing:.16em;color:var(--accent);margin-bottom:12px;
}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-0.01em;margin-bottom:16px}
.section-sub{font-size:16px;color:var(--body-c);margin:0}

/* ---------- 等级卡 ---------- */
.level-grid{row-gap:24px}
.level-card{
  height:100%;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:28px 26px;box-shadow:var(--shadow-sm);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease),border-color 240ms var(--ease);
}
.level-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#D6D0C4}
.level-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:999px;font-size:12px;font-weight:600;line-height:1;
}
.badge-trust{background:rgba(15,107,92,.09);color:var(--trust)}
.badge-medal{background:rgba(185,138,60,.13);color:var(--medal)}
.badge-muted{background:rgba(138,145,152,.14);color:var(--muted)}
.level-no{font-family:Inter,system-ui,sans-serif;font-size:34px;font-weight:800;color:transparent;-webkit-text-stroke:1.5px #CFC9BC;line-height:1}
.level-card h3{font-size:22px;font-weight:700;margin-bottom:10px}
.level-card .level-for{font-size:13px;color:var(--muted);margin-bottom:16px}
.level-desc{font-size:15px;color:var(--body-c);margin-bottom:18px}
.level-points{display:grid;gap:10px;padding-top:18px;border-top:1px solid var(--line)}
.level-points li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-2)}
.level-points i{color:var(--trust);font-size:12px;margin-top:6px}

/* ---------- 权益明细编号列表 ---------- */
.spec-list{border-top:1px solid var(--line)}
.spec-item{
  display:grid;grid-template-columns:76px minmax(0,1fr) 170px;gap:24px;
  align-items:start;padding:28px 0;border-bottom:1px solid var(--line);
  transition:background 240ms var(--ease);
}
.spec-item:hover{background:rgba(232,84,43,.035)}
.spec-num{font-size:15px;font-weight:800;color:var(--accent);letter-spacing:.06em;padding-top:4px}
.spec-body h3{font-size:19px;font-weight:600;margin-bottom:8px}
.spec-body p{font-size:15px;color:var(--body-c);max-width:64ch;margin:0}
.spec-value{
  justify-self:end;font-size:13px;font-weight:600;color:var(--trust);
  background:rgba(15,107,92,.08);border-radius:999px;padding:6px 14px;white-space:nowrap;
}

/* ---------- 场景图文 ---------- */
.scene-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:44px 0;border-bottom:1px solid var(--line);
}
.scene-row:first-of-type{padding-top:0}
.scene-row:last-of-type{border-bottom:0;padding-bottom:0}
.scene-row.is-reverse .scene-media{order:-1}
.scene-media{margin:0}
.scene-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);
  box-shadow:var(--shadow-sm);background:var(--bg-alt);
}
.scene-body h3{font-size:22px;margin-bottom:14px}
.scene-body p{font-size:15.5px;margin-bottom:18px}
.scene-points{display:grid;gap:10px}
.scene-points li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--ink-2)}
.scene-points i{color:var(--accent);font-size:12px;margin-top:6px}

/* ---------- FAQ ---------- */
.faq-group{margin-bottom:44px}
.faq-group:last-of-type{margin-bottom:0}
.faq-group-title{
  display:flex;align-items:center;gap:12px;font-size:18px;font-weight:700;
  color:var(--ink);margin-bottom:8px;
}
.faq-group-title::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--accent)}
.faq-list{max-width:840px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;
  gap:20px;padding:20px 0;font-size:17px;font-weight:600;color:var(--ink);
  transition:color 160ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;margin-top:4px;
  transition:transform 240ms var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
}
.faq-icon::before{left:0;top:10px;width:22px;height:2px}
.faq-icon::after{left:10px;top:0;width:2px;height:22px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-answer{padding:0 40px 22px 0;font-size:15.5px;color:var(--body-c)}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:
    linear-gradient(90deg,rgba(246,244,239,.05) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(180deg,rgba(246,244,239,.05) 1px,transparent 1px) 0 0/64px 64px,
    var(--ink-2);
  padding:72px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-inner h2{color:#F6F4EF;font-size:clamp(24px,3vw,34px);margin-bottom:12px;letter-spacing:-0.01em}
.cta-inner p{color:rgba(246,244,239,.72);font-size:15.5px;margin:0;max-width:52ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:#0E1113;color:rgba(246,244,239,.72);padding:72px 0 28px;margin-bottom:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo .logo-mark{background:linear-gradient(135deg,var(--accent) 0 45%,transparent 45% 100%),#F6F4EF}
.footer-logo .logo-mark::after{border-color:#0E1113}
.footer-logo .logo-text{color:#F6F4EF;font-weight:800;font-size:18px;letter-spacing:-0.01em}
.footer-col h4{color:#F6F4EF;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:.02em}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(246,244,239,.62);margin:0}
.footer-col a{display:block;font-size:14px;color:rgba(246,244,239,.62);padding:6px 0}
.footer-col a:hover{color:var(--accent)}
.footer-legal{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(246,244,239,.12);
  font-size:13px;color:rgba(246,244,239,.5);
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:var(--z-tab);
  background:rgba(255,255,255,.98);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar .tab-item{
  position:relative;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:60px;font-size:11px;color:var(--muted);
}
.mobile-tabbar .tab-item i{font-size:18px}
.mobile-tabbar .tab-item.is-active{color:var(--accent)}
.mobile-tabbar .tab-item.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:2px;background:var(--accent);border-radius:2px;
}
.mobile-tabbar .tab-item:hover{color:var(--accent)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 平板 ---------- */
@media (max-width:1279px){
  .section{padding:84px 0}
  .page-hero{padding:60px 0 54px}
  .scene-row{gap:40px}
}

@media (max-width:1023px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .header-actions .btn-text{display:none}
  .section{padding:72px 0}
  .metrics{grid-template-columns:repeat(2,1fr);gap:28px}
  .spec-item{grid-template-columns:56px minmax(0,1fr);gap:16px}
  .spec-value{grid-column:2;justify-self:start;margin-top:12px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .scene-row{grid-template-columns:1fr;gap:24px}
  .scene-row.is-reverse .scene-media{order:0}
}

/* ---------- 手机 ---------- */
@media (max-width:767px){
  body{padding-bottom:calc(60px + env(safe-area-inset-bottom))}
  .container{padding:0 20px}
  .header-inner{height:60px;gap:10px}
  .logo{font-size:16px;gap:8px}
  .logo-text .lt-full{display:none}
  .logo-text .lt-short{display:inline}
  .header-actions{gap:10px}
  .header-actions .btn{height:36px;padding:0 14px;font-size:13px}
  .btn{height:48px;padding:0 20px}
  .btn-sm{height:36px;padding:0 14px;font-size:13px}
  .page-hero{padding:44px 0 40px}
  .page-hero h1{font-size:28px;line-height:1.22}
  .lead{font-size:15.5px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .hero-media{margin-top:32px;padding-bottom:0}
  .float-card{position:static;width:100%;margin-top:16px}
  .metrics{margin-top:36px;padding-top:24px;gap:20px}
  .metric-num{font-size:26px}
  .anchor-bar{top:60px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .level-card{padding:22px 20px}
  .spec-item{grid-template-columns:1fr;gap:8px;padding:22px 0}
  .spec-num{padding-top:0}
  .spec-value{grid-column:1;margin-top:8px}
  .faq-answer{padding-right:0}
  .cta-band{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:24px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-footer{padding:56px 0 24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-legal{flex-direction:column;gap:8px;margin-top:32px}
  .mobile-tabbar{display:flex}
}

@media (max-width:520px){
  .hero-points{flex-direction:column;gap:8px}
  .metrics{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  .level-card:hover{transform:none}
}