/* roulang page: index */
:root{
  --brand-900:#0A3F3A;
  --brand-700:#0B6E62;
  --brand-600:#0E8F7E;
  --brand-100:#E4F4F1;
  --accent:#F08A3C;
  --accent-700:#D9752A;
  --deep:#0E1F1E;
  --paper:#FFFFFF;
  --bg:#F6F9F8;
  --ink:#10201E;
  --body:#43514F;
  --muted:#7C8B89;
  --line:#E4EAE8;
  --ok:#16A34A;
  --warn:#D98A1F;
  --danger:#C9453F;
  --r-s:6px;
  --r-m:10px;
  --r-l:16px;
  --sh-1:0 1px 2px rgba(16,32,30,.04);
  --sh-2:0 10px 28px rgba(16,32,30,.08);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0}
h1{font-size:40px;line-height:1.25}
h2{font-size:30px;line-height:1.35}
h3{font-size:21px;line-height:1.5}
h4{font-size:17px;line-height:1.6}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-700);text-decoration:none;transition:color .16s ease}
a:hover{color:var(--brand-600)}
button{font-family:inherit}
*:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
::selection{background:rgba(14,143,126,.18)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0;background:var(--paper)}
.section-alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:40px;max-width:760px}
.section-head .eyebrow{display:inline-block;font-size:13px;letter-spacing:.08em;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:4px 10px;margin-bottom:14px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--body)}
.section-flex{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--deep);color:#BFD4D1;font-size:13px;height:36px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.topbar-domain{font-family:var(--font-mono);color:#EAF5F3;letter-spacing:.02em}
.topbar-tip{color:#8FA9A6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:12px}
.topbar-right a{color:#D6E8E5;font-size:13px}
.topbar-right a:hover{color:var(--accent)}
.topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.2)}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:60}
.navbar{background:var(--paper);border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-stuck .navbar{box-shadow:var(--sh-1)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:26px;height:26px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:3px}
.logo-mark i{display:block;background:var(--brand-600);border-radius:1.5px}
.logo-mark i:nth-child(5){background:var(--accent)}
.logo-text{font-size:19px;font-weight:700;color:var(--ink);white-space:nowrap}
.logo:hover .logo-text{color:var(--brand-700)}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav ul a{position:relative;display:inline-block;font-size:16px;font-weight:500;color:var(--ink);padding:22px 0;line-height:1}
.main-nav ul a::after{content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--brand-600);border-radius:2px;transform:scaleX(0);transform-origin:center;transition:transform .2s ease}
.main-nav ul a:hover{color:var(--brand-600)}
.main-nav ul a:hover::after,.main-nav ul a.active::after{transform:scaleX(1)}
.main-nav ul a.active{color:var(--brand-700)}
.nav-cta{height:42px;padding:0 20px;font-size:15px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--paper);border-radius:var(--r-m);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-m);font-size:16px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;white-space:nowrap}
.btn-primary{background:var(--accent);color:#2A1503;box-shadow:0 6px 16px rgba(240,138,60,.26)}
.btn-primary:hover{background:var(--accent-700);color:#2A1503;transform:translateY(-1px)}
.btn-brand{background:var(--brand-600);color:#fff}
.btn-brand:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.42);color:#fff;background:transparent}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff}
.btn-outline{border-color:var(--line);background:var(--paper);color:var(--brand-700)}
.btn-outline:hover{border-color:var(--brand-600);color:var(--brand-700)}
.btn-block{width:100%}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-600)}
.text-link::after{content:"→";transition:transform .18s ease}
.text-link:hover::after{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--deep);color:#D8E6E4;padding:76px 0 88px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(14,143,126,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(14,143,126,.08) 1px,transparent 1px);background-size:48px 48px;opacity:.7;pointer-events:none}
.hero .container{position:relative}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.06em;color:#9FE6D8;background:rgba(14,143,126,.16);border:1px solid rgba(14,143,126,.4);border-radius:999px;padding:5px 14px;margin-bottom:20px}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero h1{color:#fff;margin-bottom:18px}
.hero h1 em{font-style:normal;color:#7FE3D2}
.hero-sub{font-size:18px;line-height:1.8;color:#B9CFCC;max-width:560px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:32px}
.hero-stats{display:flex;align-items:center;gap:0;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.14);padding-top:22px}
.hero-stat{padding-right:28px;margin-right:28px;border-right:1px solid rgba(255,255,255,.14)}
.hero-stat:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-stat b{display:block;font-family:var(--font-num);font-size:28px;line-height:1.2;color:#fff;font-weight:700}
.hero-stat span{font-size:13px;color:#8FA9A6}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-l);box-shadow:0 24px 48px rgba(0,0,0,.35)}
.hero-visual::after{content:"";position:absolute;right:-12px;bottom:-12px;width:96px;height:96px;background-image:radial-gradient(circle,rgba(240,138,60,.85) 2px,transparent 2.4px);background-size:16px 16px;opacity:.7;border-radius:8px}

/* ---------- 功能分组 ---------- */
.feature-layout{display:grid;grid-template-columns:340px 1fr;gap:56px;align-items:start}
.feature-aside{position:sticky;top:112px}
.feature-aside h2{margin-bottom:14px}
.feature-aside p{margin-bottom:20px;color:var(--body)}
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feature-block{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);padding:28px 26px 24px;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.feature-block:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.feature-num{display:inline-block;font-family:var(--font-mono);font-size:14px;font-weight:700;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:3px 9px;margin-bottom:14px}
.feature-block h3{font-size:19px;margin-bottom:10px}
.feature-block p{font-size:15.5px;color:var(--body);margin-bottom:16px}

/* ---------- 使用场景 ---------- */
.scene-list{display:flex;flex-direction:column;gap:56px}
.scene-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.scene-row:nth-child(even) .scene-media{order:2}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-l);border:1px solid var(--line)}
.scene-index{font-family:var(--font-mono);font-size:13px;color:var(--brand-600);letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px;display:block}
.scene-body h3{margin-bottom:12px}
.scene-body p{margin-bottom:16px}
.scene-points li{position:relative;padding-left:18px;font-size:15.5px;color:var(--body);margin-bottom:8px}
.scene-points li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;background:var(--brand-100);border:1px solid var(--brand-600);border-radius:2px}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.case-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.case-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.case-grid .case-card:nth-child(2){margin-top:28px}
.case-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.case-body{padding:26px 24px 24px}
.case-client{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.case-body h3{font-size:20px;margin-bottom:10px}
.case-body .case-line{font-size:15.5px;margin-bottom:20px}
.case-metrics{display:flex;gap:32px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:16px 0;margin-bottom:18px}
.case-metric b{display:block;font-family:var(--font-num);font-size:30px;line-height:1.15;color:var(--accent);font-weight:700}
.case-metric span{font-size:13px;color:var(--muted)}

/* ---------- 定价 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.price-card{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);padding:32px 26px;box-shadow:var(--sh-1);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.price-card.featured{border-color:var(--brand-600);border-top:4px solid var(--brand-600);padding-top:32px}
.price-badge{position:absolute;top:-13px;left:26px;background:var(--brand-600);color:#fff;font-size:12px;font-weight:600;letter-spacing:.06em;border-radius:999px;padding:4px 12px}
.price-card h3{font-size:19px;margin-bottom:6px}
.price-amount{display:flex;align-items:baseline;gap:6px;margin:14px 0 10px}
.price-amount b{font-family:var(--font-num);font-size:38px;line-height:1;color:var(--ink);font-weight:700}
.price-amount span{font-size:14px;color:var(--muted)}
.price-desc{font-size:14.5px;color:var(--muted);margin-bottom:20px}
.price-list{margin-bottom:24px;flex:1}
.price-list li{position:relative;padding-left:26px;font-size:15.5px;color:var(--body);margin-bottom:10px}
.price-list li::before{content:"";position:absolute;left:0;top:.55em;width:14px;height:8px;border-left:2px solid var(--brand-600);border-bottom:2px solid var(--brand-600);transform:rotate(-45deg)}
.price-foot{margin-top:16px;font-size:13px;color:var(--muted);text-align:center}
.price-foot a{font-weight:600}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.news-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.news-card-link{display:block;color:inherit}
.news-card-link:hover{color:inherit}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:20px 20px 22px}
.badge{display:inline-block;font-size:13px;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:2px 9px;margin-bottom:12px}
.news-body h3{font-size:17px;line-height:1.55;margin-bottom:10px;transition:color .16s ease}
.news-card:hover .news-body h3{color:var(--brand-600)}
.news-sum{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:14.5px;color:var(--body);margin-bottom:14px}
.news-time{display:block;font-family:var(--font-mono);font-size:13px;color:var(--muted)}
.empty-state{text-align:center;padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-l);background:var(--paper)}
.empty-icon{display:inline-block;width:52px;height:52px;border-radius:50%;background:var(--brand-100);border:1px solid var(--line);margin-bottom:16px}
.empty-state p{color:var(--muted);margin-bottom:18px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);margin-bottom:14px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item[open]{border-color:var(--brand-600);box-shadow:var(--sh-1)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-700)}
.faq-icon{flex:0 0 auto;position:relative;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-600);border-radius:2px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:transform .2s ease}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-body{padding:0 24px 22px;color:var(--body);font-size:16px;background:var(--bg)}

/* ---------- 底部 CTA ---------- */
.cta-band{background:var(--deep);color:#CFE2DF;padding:56px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;left:-30px;top:-30px;width:220px;height:220px;background-image:radial-gradient(circle,rgba(240,138,60,.5) 2px,transparent 2.4px);background-size:18px 18px;opacity:.35}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:28px;margin-bottom:8px}
.cta-inner p{color:#9DB6B3;font-size:16px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--deep);color:#9DB6B3;font-size:15px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.footer-brand .logo-text{color:#fff;font-size:18px}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.8;max-width:280px}
.logo-mark.on-dark i{background:#4FCFBB}
.logo-mark.on-dark i:nth-child(5){background:var(--accent)}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:10px;font-size:14.5px}
.footer-col a{color:#9DB6B3}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px;color:#7E9794}
.footer-bottom .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .feature-layout{grid-template-columns:290px 1fr;gap:40px}
}
@media (max-width:991px){
  h1{font-size:32px}
  h2{font-size:26px}
  .section{padding:64px 0}
  .container{padding:0 24px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual::after{display:none}
  .feature-layout{grid-template-columns:1fr;gap:32px}
  .feature-aside{position:static}
  .price-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr}
  .case-grid .case-card:nth-child(2){margin-top:0}
  .nav-toggle{display:flex}
  .main-nav{position:fixed;left:0;right:0;top:104px;bottom:0;background:var(--paper);flex-direction:column;align-items:stretch;gap:0;padding:16px 24px 32px;transform:translateX(102%);transition:transform .26s ease;overflow-y:auto;box-shadow:var(--sh-2)}
  .main-nav.open{transform:translateX(0)}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0}
  .main-nav ul a{display:block;padding:13px 0;font-size:16px;border-bottom:1px solid var(--line)}
  .main-nav ul a::after{display:none}
  .main-nav ul a.active{color:var(--brand-600)}
  .nav-cta{margin-top:20px;width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 36px}
}
@media (max-width:768px){
  body{font-size:16px}
  .hero{padding:52px 0 64px}
  .hero-stat{padding-right:20px;margin-right:20px;margin-bottom:12px}
  .scene-row{grid-template-columns:1fr;gap:24px}
  .scene-row:nth-child(even) .scene-media{order:0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  h1{font-size:27px}
  h2{font-size:23px}
  .section{padding:52px 0}
  .topbar-tip{display:none}
  .hero-actions .btn{width:100%}
  .nav-cta{height:46px}
  .news-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .price-amount b{font-size:32px}
  .case-metrics{gap:20px}
}

/* roulang page: article */
:root{
  --brand-900:#0A3F3A;
  --brand-700:#0B6E62;
  --brand-600:#0E8F7E;
  --brand-100:#E4F4F1;
  --accent:#F08A3C;
  --deep:#0E1F1E;
  --paper:#FFFFFF;
  --bg:#F6F9F8;
  --ink:#10201E;
  --body:#43514F;
  --muted:#7C8B89;
  --line:#E4EAE8;
  --ok:#16A34A;
  --warn:#D98A1F;
  --danger:#C9453F;
  --r-s:6px;
  --r-m:10px;
  --r-l:16px;
  --sh-1:0 1px 2px rgba(16,32,30,.04);
  --sh-2:0 10px 28px rgba(16,32,30,.08);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","SF Mono",system-ui,-apple-system,sans-serif;
  --gutter:32px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0}
h1{font-size:40px;line-height:1.25}
h2{font-size:30px;line-height:1.35}
h3{font-size:21px;line-height:1.5}
h4{font-size:17px;line-height:1.6}
p{margin:0 0 18px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--gutter)}
.section{padding:88px 0}
.section-alt{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--brand-700);
  background:var(--brand-100);border-radius:var(--r-s);
  padding:5px 12px;margin-bottom:16px;font-weight:600;
}
.section-head p{margin-top:14px;color:var(--body)}
.muted{color:var(--muted)}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-m);
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;color:var(--ink);
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn-primary{background:var(--brand-600);color:#fff;border-color:var(--brand-600)}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-accent:hover{background:#DB7628;border-color:#DB7628;color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-700);background:#fff}
.btn-on-dark{border-color:rgba(255,255,255,.32);color:#fff}
.btn-on-dark:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-sm{height:40px;padding:0 18px;font-size:15px}
.btn:active{transform:translateY(0)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:#fff}
.topbar{background:var(--deep);color:rgba(255,255,255,.72);font-size:13px;height:36px;display:flex;align-items:center;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:24px 24px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-domain{font-family:var(--font-num);color:#fff;letter-spacing:.02em}
.topbar-tip{color:rgba(255,255,255,.6);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:12px}
.topbar-right a{color:rgba(255,255,255,.8);font-size:13px}
.topbar-right a:hover{color:#fff}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.24)}
.navbar{border-bottom:1px solid var(--line);background:#fff}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700}
.logo:hover{color:var(--ink)}
.logo-mark{display:grid;grid-template-columns:repeat(3,4px);grid-template-rows:repeat(3,4px);gap:2px;padding:6px;background:var(--brand-100);border-radius:8px}
.logo-mark i{display:block;width:4px;height:4px;border-radius:1px;background:var(--brand-600)}
.logo-mark.on-dark{background:rgba(255,255,255,.08)}
.logo-mark.on-dark i{background:#5FD3BF}
.logo-text{font-size:18px;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav ul li a{position:relative;display:inline-block;color:var(--ink);font-size:17px;font-weight:500;padding:22px 0}
.main-nav ul li a::after{content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.main-nav ul li a:hover{color:var(--brand-600)}
.main-nav ul li a:hover::after,.main-nav ul li a.active::after{transform:scaleX(1)}
.main-nav ul li a.active{color:var(--brand-700)}
.nav-cta{flex:none}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- article head ---------- */
.article-head{background:var(--bg);border-bottom:1px solid var(--line);padding:36px 0 44px;
  background-image:linear-gradient(rgba(14,143,126,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(14,143,126,.05) 1px,transparent 1px);
  background-size:32px 32px;}
.breadcrumb{font-size:12px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:#C6D2D0}
.breadcrumb .current{color:var(--ink);font-weight:700}
.article-title{max-width:900px;font-size:38px;line-height:1.3}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;padding-bottom:18px;border-bottom:1px solid var(--line);max-width:900px}
.article-meta .meta-item{font-family:var(--font-num);font-size:13px;color:var(--muted)}
.article-meta .meta-tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-s);background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;font-family:var(--font-sans)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6D2D0}

/* ---------- article layout ---------- */
.article-wrap{padding:56px 0 72px}
.article-grid{display:grid;grid-template-columns:minmax(0,760px) 200px;gap:56px;justify-content:center;align-items:start}
.article-main{min-width:0}
.article-body{font-size:17px;line-height:1.9;color:var(--body);max-width:760px}
.article-body h2{font-size:26px;line-height:1.4;margin:40px 0 14px;padding-left:14px;position:relative;scroll-margin-top:120px}
.article-body h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--brand-600)}
.article-body h3{font-size:20px;margin:28px 0 10px;color:var(--ink)}
.article-body h4{font-size:17px;margin:22px 0 8px}
.article-body p{margin:0 0 18px}
.article-body a{color:var(--brand-600);border-bottom:1px solid rgba(14,143,126,.4)}
.article-body a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700)}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:2px}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:1px;background:var(--brand-600)}
.article-body ol{counter-reset:li}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:li}
.article-body ol li::before{content:counter(li);position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);font-family:var(--font-num);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1}
.article-body blockquote{margin:24px 0;padding:18px 22px;background:var(--brand-100);border-left:3px solid var(--brand-600);border-radius:0 var(--r-m) var(--r-m) 0;color:var(--ink)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-s);margin:12px 0;width:100%}
.article-body figure{margin:22px 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:16px;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:var(--bg);color:var(--ink);font-weight:600}
.article-body tr:last-child td{border-bottom:0}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;background:var(--bg);padding:2px 6px;border-radius:4px;color:var(--brand-700)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.article-empty{padding:56px 0;text-align:center}
.article-empty .empty-mark{width:64px;height:64px;margin:0 auto 18px;border-radius:50%;background:var(--brand-100);display:flex;align-items:center;justify-content:center}
.article-empty .empty-mark span{width:10px;height:10px;border-radius:2px;background:var(--brand-600);box-shadow:14px 0 0 var(--brand-600),-14px 0 0 var(--brand-600)}
.article-empty h2{font-size:24px;margin-bottom:10px}
.article-empty p{max-width:520px;margin:0 auto 22px}

/* ---------- toc ---------- */
.toc{position:sticky;top:120px;padding-left:20px;border-left:1px solid var(--line)}
.toc h4{font-size:13px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:14px;font-weight:600}
.toc ul li{margin-bottom:10px}
.toc ul li a{display:block;font-size:14px;line-height:1.6;color:var(--body);padding-left:10px;border-left:2px solid transparent}
.toc ul li a:hover{color:var(--brand-600);border-left-color:var(--brand-600)}

/* ---------- article footer blocks ---------- */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.article-tags .tag-label{font-size:13px;color:var(--muted);letter-spacing:.06em}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-s);background:var(--brand-100);color:var(--brand-700);font-size:14px;font-weight:600}
.tag:hover{background:#D4EDE8;color:var(--brand-700)}
.article-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:36px}
.article-nav a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:20px;box-shadow:var(--sh-1);transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}
.article-nav a:hover{border-color:var(--brand-600);box-shadow:var(--sh-2);transform:translateY(-2px)}
.article-nav .nav-kicker{font-size:13px;color:var(--muted);display:block;margin-bottom:8px}
.article-nav .nav-title{font-size:17px;font-weight:600;color:var(--ink);line-height:1.55}
.article-nav a:hover .nav-title{color:var(--brand-700)}
.back-row{margin-top:32px}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}
.card:hover{border-color:var(--brand-600);box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-badge{align-self:flex-start;font-size:13px;font-weight:600;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:3px 10px}
.card-title{font-size:19px;line-height:1.5}
.card-title a{color:var(--ink)}
.card-title a:hover{color:var(--brand-600)}
.card-desc{font-size:15px;line-height:1.75;color:var(--body);margin:0}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid var(--line)}
.card-time{font-family:var(--font-num);font-size:13px;color:var(--muted)}

/* ---------- cta ---------- */
.cta-band{background:var(--deep);color:#fff;position:relative;overflow:hidden;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:28px 28px;}
.cta-band::after{content:"";position:absolute;right:-60px;bottom:-60px;width:220px;height:220px;background-image:radial-gradient(rgba(94,211,191,.5) 1.6px,transparent 1.6px);background-size:16px 16px;opacity:.5;pointer-events:none}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0}
.cta-inner h2{color:#fff;font-size:28px;max-width:620px}
.cta-inner p{color:rgba(255,255,255,.7);margin:12px 0 0;max-width:640px;font-size:16px}
.cta-actions{display:flex;gap:14px;flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:rgba(255,255,255,.7);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a,.footer-col ul li{font-size:15px;color:rgba(255,255,255,.66)}
.footer-col ul li a:hover{color:#5FD3BF}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:20px;padding-bottom:20px;font-size:13px;color:var(--muted)}
.footer-bottom span{color:rgba(255,255,255,.5)}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  :root{--gutter:28px}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:0;justify-content:flex-start}
  .toc{display:none}
}
@media (max-width:992px){
  :root{--gutter:24px}
  .section{padding:64px 0}
  h1{font-size:32px}
  h2{font-size:26px}
  .article-title{font-size:32px}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:96px 22px 28px;
    transform:translateX(102%);transition:transform .28s ease;
    box-shadow:-14px 0 36px rgba(16,32,30,.14);overflow-y:auto;z-index:70;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0}
  .main-nav ul li a{display:block;padding:14px 2px;font-size:17px;border-bottom:1px solid var(--line)}
  .main-nav ul li a::after{display:none}
  .main-nav ul li a.active{color:var(--brand-700)}
  .nav-cta{margin-top:22px;width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:48px 0}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .topbar-tip{display:none}
  .article-head{padding:26px 0 32px}
  .article-title{font-size:28px}
  .article-wrap{padding:40px 0 56px}
  .article-body{font-size:16.5px}
  .article-body h2{font-size:22px;margin-top:32px}
  .article-nav{grid-template-columns:1fr}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:576px){
  :root{--gutter:16px}
  h1{font-size:26px}
  .logo-text{font-size:16px}
  .card-grid{grid-template-columns:1fr}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .article-meta{gap:10px}
}

/* roulang page: category1 */
:root{
  --brand-900:#0A3F3A;--brand-700:#0B6E62;--brand-600:#0E8F7E;--brand-100:#E4F4F1;
  --accent:#F08A3C;--accent-dark:#D9741F;--deep:#0E1F1E;--paper:#FFFFFF;--bg:#F6F9F8;
  --ink:#10201E;--body:#43514F;--muted:#7C8B89;--line:#E4EAE8;--ok:#16A34A;--warn:#D98A1F;--danger:#C9453F;
  --r-s:6px;--r-m:10px;--r-l:16px;
  --sh-1:0 1px 2px rgba(16,32,30,.04);--sh-2:0 10px 28px rgba(16,32,30,.08);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --container:1200px;--pad:32px;
  --sec-y:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);font-size:17px;line-height:1.85;color:var(--body);background:var(--paper);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.35}
h1{font-size:40px;line-height:1.25}
h2{font-size:30px;line-height:1.35}
h3{font-size:21px;line-height:1.5}
h4{font-size:17px;line-height:1.6;font-weight:700}
p{margin:0 0 18px}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700)}
img{max-width:100%;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.container{max-width:var(--container);margin:0 auto;padding:0 var(--pad);width:100%}
@media(min-width:1440px){:root{--container:1280px}}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.mono{font-family:var(--font-mono)}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:80;background:#fff}
.topbar{background:var(--deep);color:rgba(255,255,255,.78);font-size:13px;height:36px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-domain{font-family:var(--font-mono);font-size:12px;color:#fff;letter-spacing:.4px}
.topbar-tip{color:rgba(255,255,255,.66);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.topbar-right a{color:rgba(255,255,255,.8);font-size:13px}
.topbar-right a:hover{color:#fff}
.topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.24)}
.navbar{background:#fff;border-bottom:1px solid var(--line);height:68px;display:flex;align-items:center;transition:box-shadow .2s ease}
.site-header.scrolled .navbar{box-shadow:var(--sh-1)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink)}
.logo:hover{color:var(--brand-700)}
.logo-mark{width:22px;height:22px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:2px;flex-shrink:0}
.logo-mark i{background:var(--brand-600);border-radius:1px;display:block}
.logo-mark.on-dark i{background:#5FD7C4}
.logo-text{font-size:18px;font-weight:700;letter-spacing:.2px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav ul li a{position:relative;display:inline-block;font-size:17px;font-weight:500;color:var(--ink);padding:6px 2px;line-height:1.2}
.main-nav ul li a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.main-nav ul li a:hover{color:var(--brand-600)}
.main-nav ul li a:hover::after,.main-nav ul li a.active::after{transform:scaleX(1)}
.main-nav ul li a.active{color:var(--brand-600)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-m);font-size:16px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--accent);color:#3A1B02}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand-600);color:var(--brand-700)}
.btn-sm{height:40px;padding:0 16px;font-size:15px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px}
.link-arrow::after{content:"→";transition:transform .18s ease}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ badge ============ */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-s);background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;line-height:1.6}
.badge-accent{background:rgba(240,138,60,.14);color:#A85A12}
.badge-outline{background:#fff;border:1px solid var(--line);color:var(--body);font-weight:500}

/* ============ page hero（矮 Hero）============ */
.page-hero{position:relative;background:var(--deep);color:#fff;overflow:hidden;min-height:280px;display:flex;align-items:center}
.page-hero .hero-bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.webp");background-size:cover;background-position:center;opacity:.34}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,31,30,.92) 0%,rgba(14,31,30,.74) 52%,rgba(14,31,30,.52) 100%)}
.page-hero .container{position:relative;z-index:2;padding-top:44px;padding-bottom:44px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:16px}
.breadcrumb a{color:rgba(255,255,255,.7)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:rgba(255,255,255,.35)}
.breadcrumb strong{color:#fff;font-weight:600}
.page-hero h1{color:#fff;font-size:36px;max-width:820px}
.page-hero .lede{margin:14px 0 0;max-width:680px;color:rgba(255,255,255,.82);font-size:17px}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:24px}
.hero-meta div{display:flex;align-items:baseline;gap:8px}
.hero-meta b{font-family:var(--font-num);font-size:24px;color:#7FE3D2;font-weight:700}
.hero-meta span{font-size:13px;color:rgba(255,255,255,.66)}

/* ============ 功能布局：锚点侧栏 + 内容列 ============ */
.feature-wrap{padding:var(--sec-y) 0;background:var(--paper)}
.feature-grid{display:grid;grid-template-columns:224px minmax(0,1fr);gap:56px;align-items:start}
.anchor-side{position:sticky;top:124px}
.anchor-side h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:14px}
.anchor-side ul{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line)}
.anchor-side a{display:block;padding:9px 14px;font-size:15px;color:var(--body);border-left:2px solid transparent;margin-left:-1px}
.anchor-side a:hover{color:var(--brand-700);background:var(--bg)}
.anchor-side a.active{color:var(--brand-700);font-weight:600;border-left-color:var(--brand-600);background:var(--brand-100)}
.anchor-tip{margin-top:22px;padding:16px;border:1px solid var(--line);border-radius:var(--r-m);background:var(--bg);font-size:13px;line-height:1.75;color:var(--body)}
.anchor-tip strong{display:block;color:var(--ink);font-size:14px;margin-bottom:6px}

.feature-body{max-width:820px}
.feature-block{padding-bottom:52px;margin-bottom:52px;border-bottom:1px solid var(--line)}
.feature-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.block-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.block-idx{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:3px 9px;letter-spacing:.06em}
.feature-block h2{font-size:26px;margin-bottom:0}
.feature-block h2 + .block-sub{margin-top:10px;color:var(--muted);font-size:15px}
.feature-media{margin:22px 0;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);background:var(--bg)}
.feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.feature-media figcaption{font-size:13px;color:var(--muted);padding:10px 16px;background:#fff;border-top:1px solid var(--line)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.spec-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;font-size:15px;margin:8px 0 0}
.spec-table caption{caption-side:top;text-align:left;font-size:13px;color:var(--muted);padding-bottom:8px}
.spec-table th,.spec-table td{border-bottom:1px solid var(--line);padding:13px 16px;text-align:left;line-height:1.7}
.spec-table thead th{background:var(--bg);color:var(--ink);font-weight:600;font-size:14px}
.spec-table tbody th{width:38%;font-weight:600;color:var(--ink);background:#fff}
.spec-table tbody tr:last-child th,.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table td{font-family:var(--font-num);color:var(--body)}
.tick-list{display:grid;gap:10px;margin:6px 0 0}
.tick-list li{position:relative;padding-left:26px;font-size:16px}
.tick-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;background:var(--brand-600);border-radius:2px}
.note-box{margin-top:20px;background:var(--brand-100);border-left:3px solid var(--brand-600);border-radius:0 var(--r-s) var(--r-s) 0;padding:16px 20px;font-size:15px;color:var(--brand-900)}

/* ============ 数据条 ============ */
.stat-strip{background:var(--deep);color:#fff;padding:52px 0;position:relative;overflow:hidden}
.stat-strip::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:26px 26px;opacity:.5}
.stat-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:left}
.stat-grid .stat b{display:block;font-family:var(--font-num);font-size:34px;color:var(--accent);line-height:1.1}
.stat-grid .stat span{display:block;margin-top:8px;font-size:14px;color:rgba(255,255,255,.72)}

/* ============ 上手流程 ============ */
.flow{padding:var(--sec-y) 0;background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--brand-700);font-weight:600;margin-bottom:10px}
.section-head h2{font-size:30px}
.section-head p{margin-top:14px;color:var(--body)}
.flow-list{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.flow-item{padding:0 24px 0 0;position:relative}
.flow-item::after{content:"";position:absolute;right:8px;top:16px;width:1px;height:calc(100% - 8px);background:var(--line)}
.flow-item:last-child::after{display:none}
.flow-item .step{font-family:var(--font-mono);font-size:13px;color:var(--brand-600);letter-spacing:.1em}
.flow-item h3{font-size:19px;margin:10px 0 8px}
.flow-item p{font-size:15px;color:var(--body);margin:0}

/* ============ 入口卡片 ============ */
.entries{padding:var(--sec-y) 0;background:#fff}
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entry-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-1);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.entry-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.entry-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg)}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .2s ease}
.entry-card:hover .thumb img{transform:scale(1.03)}
.entry-card .body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-card h3{font-size:19px}
.entry-card p{font-size:15px;margin:0;color:var(--body)}
.entry-card .foot{margin-top:auto;padding-top:6px}

/* ============ FAQ ============ */
.faq-sec{padding:var(--sec-y) 0;background:var(--bg);border-top:1px solid var(--line)}
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-1);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 22px;font-size:18px;font-weight:600;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--font-num);font-size:22px;color:var(--brand-600);line-height:1;flex-shrink:0}
.faq-item[open] summary::after{content:"–"}
.faq-item[open] summary{color:var(--brand-700)}
.faq-item .answer{padding:0 22px 22px;background:var(--bg);color:var(--body);font-size:16px}
.faq-item .answer p{margin:0}
.faq-item .answer p + p{margin-top:12px}

/* ============ CTA ============ */
.cta-band{background:var(--deep);color:#fff;padding:56px 0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(95,215,196,.14) 1px,transparent 1px);background-size:24px 24px}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px}
.cta-inner h2{color:#fff;font-size:28px}
.cta-inner p{margin:10px 0 0;color:rgba(255,255,255,.74);font-size:16px;max-width:560px}
.cta-actions{display:flex;gap:12px;flex-shrink:0}

/* ============ footer ============ */
.site-footer{background:var(--deep);color:rgba(255,255,255,.7);padding:64px 0 0;position:relative;overflow:hidden}
.site-footer::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:28px 28px}
.footer-grid{position:relative;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .logo-text{color:#fff}
.footer-brand p{margin:16px 0 0;font-size:15px;max-width:280px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li,.footer-col a{font-size:15px;color:rgba(255,255,255,.7)}
.footer-col a:hover{color:#7FE3D2}
.footer-bottom{position:relative;border-top:1px solid rgba(255,255,255,.12);padding:18px 0}
.footer-bottom .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted)}

/* ============ 响应式 ============ */
@media(max-width:1200px){
  .feature-grid{grid-template-columns:200px minmax(0,1fr);gap:40px}
}
@media(max-width:992px){
  :root{--pad:24px;--sec-y:64px}
  h1{font-size:32px}
  .page-hero h1{font-size:30px}
  .nav-toggle{display:flex}
  .main-nav{position:fixed;top:104px;right:0;bottom:0;width:min(88vw,360px);background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:20px 24px 32px;box-shadow:-14px 0 34px rgba(16,32,30,.14);transform:translateX(105%);transition:transform .26s ease;overflow-y:auto}
  .main-nav.open{transform:none}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0}
  .main-nav ul li a{display:flex;align-items:center;height:48px;border-bottom:1px solid var(--line);font-size:16px}
  .main-nav ul li a::after{display:none}
  .main-nav ul li a.active{color:var(--brand-700);font-weight:600}
  .nav-cta{margin-top:20px;width:100%}
  .feature-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .anchor-side{position:static;top:auto;border:1px solid var(--line);border-radius:var(--r-m);padding:16px 16px 8px;background:var(--bg)}
  .anchor-side ul{border-left:0;flex-direction:row;flex-wrap:wrap;gap:8px}
  .anchor-side a{border:1px solid var(--line);border-radius:var(--r-s);background:#fff;padding:6px 12px;margin-left:0;font-size:14px;border-left-width:1px}
  .anchor-side a.active{border-color:var(--brand-600)}
  .anchor-tip{display:none}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:28px 20px}
  .flow-list{grid-template-columns:repeat(2,1fr);gap:28px 0}
  .flow-item:nth-child(2)::after{display:none}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  body{font-size:16px}
  :root{--sec-y:52px;--pad:16px}
  h2{font-size:25px}
  .topbar-tip{display:none}
  .page-hero{min-height:0}
  .page-hero .container{padding-top:34px;padding-bottom:34px}
  .page-hero h1{font-size:26px}
  .page-hero .lede{font-size:16px}
  .hero-meta{gap:14px 22px}
  .split{grid-template-columns:1fr;gap:20px}
  .feature-block h2{font-size:22px}
  .spec-table th,.spec-table td{padding:11px 12px;font-size:14px}
  .spec-table tbody th{width:44%}
  .entry-grid{grid-template-columns:1fr}
  .stat-grid b{font-size:28px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom .container{flex-direction:column;gap:6px}
}
@media(max-width:520px){
  .flow-list{grid-template-columns:1fr;gap:24px}
  .flow-item{padding-right:0}
  .flow-item::after{display:none}
  .main-nav{top:104px;width:100%}
  .logo-text{font-size:16px}
  .badge{font-size:12px}
}

/* roulang page: category2 */
:root{
  --brand-900:#0A3F3A;
  --brand-700:#0B6E62;
  --brand-600:#0E8F7E;
  --brand-100:#E4F4F1;
  --accent:#F08A3C;
  --accent-soft:#FDEFE1;
  --deep:#0E1F1E;
  --paper:#FFFFFF;
  --bg:#F6F9F8;
  --ink:#10201E;
  --body:#43514F;
  --muted:#7C8B89;
  --line:#E4EAE8;
  --ok:#16A34A;
  --warn:#D98A1F;
  --danger:#C9453F;
  --r-s:6px;
  --r-m:10px;
  --r-l:16px;
  --sh-1:0 1px 2px rgba(16,32,30,.04);
  --sh-2:0 10px 28px rgba(16,32,30,.08);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sp-1:8px; --sp-2:12px; --sp-3:16px; --sp-4:24px; --sp-5:32px; --sp-6:48px; --sp-7:64px; --sp-8:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0;}
h1{font-size:40px;line-height:1.25;}
h2{font-size:30px;line-height:1.35;}
h3{font-size:21px;line-height:1.5;}
h4{font-size:17px;line-height:1.6;font-weight:700;}
p{margin:0 0 18px;}
p:last-child{margin-bottom:0;}
a{color:var(--brand-600);text-decoration:none;transition:color .16s ease,border-color .16s ease;}
a:hover{color:var(--brand-700);}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--sp-8) 0;border-top:1px solid var(--line);}
.section--tint{background:var(--bg);}
.section--deep{background:var(--deep);color:#C8DAD6;border-top:0;}
.section--deep h2,.section--deep h3{color:#FFFFFF;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.12em;color:var(--brand-700);background:var(--brand-100);border-radius:999px;padding:6px 14px;margin-bottom:16px;font-weight:600;line-height:1.5;}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-600);display:inline-block;}
.section-head{max-width:760px;margin-bottom:var(--sp-6);}
.section-head p{margin-top:12px;color:var(--body);}
.lead{font-size:18px;color:var(--body);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--r-m);border:1px solid transparent;font-size:16px;font-weight:600;line-height:1;transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease;white-space:nowrap;}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--accent);color:#3A1D05;box-shadow:var(--sh-1);}
.btn-primary:hover{background:#E37C2C;color:#3A1D05;box-shadow:var(--sh-2);}
.btn-solid{background:var(--brand-600);color:#fff;box-shadow:var(--sh-1);}
.btn-solid:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--brand-600);color:var(--brand-700);}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff;}
.btn-block{width:100%;}
.btn-sm{height:42px;padding:0 20px;font-size:15px;}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--paper);}
.site-header.is-scrolled .navbar{box-shadow:var(--sh-1);}
.topbar{background:var(--deep);color:#A9C4BF;font-size:13px;line-height:36px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0;}
.topbar-domain{font-family:var(--font-mono);color:#FFFFFF;letter-spacing:.02em;}
.topbar-tip{color:#8FAFAA;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.topbar-right{display:flex;align-items:center;gap:12px;}
.topbar-right a{color:#C8DAD6;font-size:13px;}
.topbar-right a:hover{color:#fff;}
.topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.2);display:inline-block;}
.navbar{background:var(--paper);border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:18px;letter-spacing:0;}
.logo:hover{color:var(--brand-700);}
.logo-text{white-space:nowrap;}
.logo-mark{display:grid;grid-template-columns:repeat(3,4px);grid-template-rows:repeat(3,4px);gap:2px;}
.logo-mark i{display:block;width:4px;height:4px;border-radius:1px;background:var(--brand-600);}
.logo-mark i:nth-child(5){background:var(--accent);}
.logo-mark.on-dark i{background:rgba(255,255,255,.55);}
.logo-mark.on-dark i:nth-child(5){background:var(--accent);}
.main-nav{display:flex;align-items:center;gap:22px;}
.main-nav ul{display:flex;align-items:center;gap:4px;}
.main-nav ul li a{display:inline-block;padding:8px 12px;color:var(--ink);font-size:16px;font-weight:500;border-bottom:2px solid transparent;transition:color .16s ease,border-color .16s ease;}
.main-nav ul li a:hover{color:var(--brand-600);border-bottom-color:var(--brand-100);}
.main-nav ul li a.active{color:var(--brand-700);border-bottom-color:var(--brand-600);font-weight:600;}
.nav-cta{height:42px;padding:0 20px;font-size:15px;}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:var(--paper);border-radius:var(--r-m);padding:0;align-items:center;justify-content:center;flex-direction:column;gap:5px;}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- breadcrumb ---------- */
.crumb-bar{border-bottom:1px solid var(--line);background:var(--paper);}
.crumb{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding:12px 0;flex-wrap:wrap;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-600);}
.crumb .sep{color:#C4D0CE;}
.crumb .current{color:var(--ink);font-weight:700;}

/* ---------- hero ---------- */
.scene-hero{position:relative;overflow:hidden;background:linear-gradient(160deg,#EAF6F3 0%,#F7FBFA 46%,#FDF3E9 100%);border-bottom:1px solid var(--line);}
.scene-hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(14,143,126,.16) 1px,transparent 1px);background-size:22px 22px;opacity:.5;pointer-events:none;}
.scene-hero::after{content:"";position:absolute;right:-140px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(240,138,60,.22),rgba(240,138,60,0) 68%);pointer-events:none;}
.scene-hero .container{position:relative;z-index:1;padding-top:64px;padding-bottom:56px;}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:center;}
.scene-hero h1{margin:0 0 16px;max-width:14em;}
.scene-hero h1 em{font-style:normal;color:var(--brand-700);}
.hero-sub{font-size:18px;max-width:560px;color:var(--body);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.fact-chip{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:14px;color:var(--brand-700);font-weight:600;box-shadow:var(--sh-1);}
.fact-chip b{font-family:var(--font-num);font-size:16px;color:var(--accent);}
.hero-figure{position:relative;border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh-2);border:1px solid rgba(14,143,126,.14);aspect-ratio:5/4;background:var(--brand-100);}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure figcaption{position:absolute;left:14px;bottom:14px;background:rgba(14,31,30,.82);color:#E8F2F0;font-size:13px;padding:6px 12px;border-radius:999px;line-height:1.5;}

/* ---------- steps ---------- */
.steps-wrap{margin-top:44px;background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:var(--r-l);padding:26px 28px;box-shadow:var(--sh-1);}
.steps-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:20px;}
.steps-head h2{font-size:20px;}
.steps-head span{font-size:13px;color:var(--muted);}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;}
.step{position:relative;padding:0 18px 0 0;}
.step::after{content:"";position:absolute;top:15px;left:44px;right:8px;height:1px;background:linear-gradient(90deg,rgba(14,143,126,.42),rgba(14,143,126,.1));}
.step:last-child{padding-right:0;}
.step:last-child::after{display:none;}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--brand-100);color:var(--brand-700);font-family:var(--font-mono);font-size:13px;font-weight:700;border:1px solid rgba(14,143,126,.24);}
.step h3{font-size:17px;margin:12px 0 6px;}
.step p{font-size:15px;color:var(--body);margin:0;}

/* ---------- index grid ---------- */
.tone-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.tone-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);padding:26px 24px 22px;box-shadow:var(--sh-1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;display:flex;flex-direction:column;gap:10px;}
.tone-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-600);}
.tone-card .tone-tag{align-self:flex-start;background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;border-radius:var(--r-s);padding:4px 10px;line-height:1.6;}
.tone-card h3{font-size:19px;}
.tone-card p{font-size:15px;margin:0;}
.tone-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);font-family:var(--font-mono);margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);}
.tone-meta b{color:var(--accent);font-weight:700;}

/* ---------- scene rows ---------- */
.scene-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;padding:44px 0;border-bottom:1px dashed var(--line);}
.scene-row:last-child{border-bottom:0;padding-bottom:0;}
.scene-row:first-child{padding-top:0;}
.scene-row.reverse .scene-media{order:2;}
.scene-row.reverse .scene-body{order:1;}
.scene-media{border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);aspect-ratio:5/4;background:var(--bg);}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.scene-row:hover .scene-media img{transform:scale(1.03);}
.scene-body h3{margin-bottom:10px;}
.scene-index{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;color:var(--brand-700);background:var(--brand-100);border-radius:var(--r-s);padding:3px 10px;margin-bottom:12px;line-height:1.7;}
.check-list{margin-top:16px;display:grid;gap:10px;}
.check-list li{position:relative;padding-left:24px;font-size:15px;line-height:1.75;}
.check-list li::before{content:"";position:absolute;left:6px;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand-600);}
.scene-body .inline-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-weight:600;font-size:15px;color:var(--brand-700);border-bottom:1px solid rgba(14,143,126,.4);padding-bottom:2px;}
.scene-body .inline-link:hover{border-bottom-color:var(--brand-700);}

/* ---------- capacity cards ---------- */
.capacity-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.capacity-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);padding:24px 22px;box-shadow:var(--sh-1);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;}
.capacity-card:hover{border-color:var(--brand-600);box-shadow:var(--sh-2);transform:translateY(-2px);}
.capacity-num{font-family:var(--font-num);font-size:30px;line-height:1.2;font-weight:700;color:var(--accent);display:block;}
.capacity-card h3{font-size:17px;margin:8px 0 6px;}
.capacity-card p{font-size:15px;margin:0;color:var(--body);}

/* ---------- next block ---------- */
.next-block{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:40px;align-items:center;}
.next-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.next-link{display:flex;flex-direction:column;gap:6px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--r-m);padding:20px 18px;color:#E4F0EE;transition:background .18s ease,border-color .18s ease,transform .18s ease;}
.next-link:hover{background:rgba(255,255,255,.12);border-color:rgba(240,138,60,.6);color:#fff;transform:translateY(-2px);}
.next-link strong{font-size:16px;color:#fff;}
.next-link span{font-size:14px;color:#9FBDB8;line-height:1.7;}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-m);background:var(--paper);margin-bottom:12px;box-shadow:var(--sh-1);overflow:hidden;transition:border-color .18s ease;}
.faq-item[open]{border-color:rgba(14,143,126,.5);}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:14px;padding:20px 22px;font-size:17px;font-weight:700;color:var(--ink);line-height:1.6;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";margin-left:auto;font-family:var(--font-num);font-size:22px;line-height:1;color:var(--brand-600);transition:transform .2s ease;}
.faq-item[open] summary::after{content:"−";}
.faq-item summary:hover{color:var(--brand-700);}
.faq-body{padding:0 22px 22px;background:var(--bg);color:var(--body);font-size:16px;}
.faq-body p{padding-top:18px;}

/* ---------- cta band ---------- */
.cta-band{background:var(--deep);position:relative;overflow:hidden;}
.cta-band::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);background-size:26px 26px;opacity:.35;}
.cta-band .container{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:28px;padding-top:44px;padding-bottom:44px;flex-wrap:wrap;}
.cta-band h2{color:#fff;font-size:26px;max-width:22em;}
.cta-band p{color:#9FBDB8;font-size:15px;margin:8px 0 0;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#9FBDB8;padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{color:#fff;margin-bottom:14px;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand p{font-size:15px;margin:0;color:#9FBDB8;}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul li{font-size:15px;color:#9FBDB8;}
.footer-col ul li a{color:#9FBDB8;}
.footer-col ul li a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:18px;padding-bottom:18px;font-size:13px;color:#7FA09A;flex-wrap:wrap;}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  h1{font-size:36px;}
  .capacity-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:992px){
  .container{padding:0 24px;}
  .section{padding:var(--sp-7) 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-figure{max-width:520px;aspect-ratio:16/9;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
  .step{padding-right:0;}
  .step::after{display:none;}
  .tone-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-row{grid-template-columns:1fr;gap:24px;padding:36px 0;}
  .scene-row.reverse .scene-media{order:0;}
  .scene-row.reverse .scene-body{order:0;}
  .next-block{grid-template-columns:1fr;gap:24px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .main-nav{position:fixed;inset:68px 0 0;background:var(--paper);flex-direction:column;align-items:stretch;gap:0;padding:16px 24px 96px;transform:translateX(100%);transition:transform .24s ease;overflow-y:auto;border-top:1px solid var(--line);}
  .main-nav.is-open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav ul li a{display:block;height:44px;line-height:44px;padding:0;font-size:17px;border-bottom:1px solid var(--line);border-left:0;}
  .main-nav ul li a.active{color:var(--brand-700);}
  .nav-cta{position:fixed;left:24px;right:24px;bottom:24px;height:50px;margin:0;}
  .nav-toggle{display:inline-flex;}
}
@media (max-width:768px){
  body{font-size:16px;}
  h1{font-size:30px;}
  h2{font-size:25px;}
  h3{font-size:19px;}
  .section{padding:var(--sp-6) 0;}
  .topbar-tip{display:none;}
  .tone-grid{grid-template-columns:1fr;}
  .capacity-grid{grid-template-columns:1fr;}
  .next-links{grid-template-columns:1fr;}
  .scene-hero .container{padding-top:44px;padding-bottom:40px;}
  .steps-wrap{padding:20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band h2{font-size:22px;}
}
@media (max-width:576px){
  .container{padding:0 16px;}
  .topbar{font-size:12px;}
  .topbar-right{gap:8px;}
  .steps{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .hero-figure{aspect-ratio:4/3;}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;gap:6px;}
}

/* roulang page: category3 */
:root{
  --brand-900:#0A3F3A;
  --brand-700:#0B6E62;
  --brand-600:#0E8F7E;
  --brand-100:#E4F4F1;
  --accent:#F08A3C;
  --deep:#0E1F1E;
  --paper:#FFFFFF;
  --bg:#F6F9F8;
  --ink:#10201E;
  --body:#43514F;
  --muted:#7C8B89;
  --line:#E4EAE8;
  --ok:#16A34A;
  --warn:#D98A1F;
  --danger:#C9453F;
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:Inter,"Helvetica Neue",system-ui,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-s:6px;
  --r-m:10px;
  --r-l:16px;
  --sh-1:0 1px 2px rgba(16,32,30,.04);
  --sh-2:0 10px 28px rgba(16,32,30,.08);
  --sec-pad:88px;
  --gutter:32px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0}
h1{font-size:40px;line-height:1.25}
h2{font-size:30px;line-height:1.35}
h3{font-size:21px;line-height:1.5}
h4{font-size:17px;line-height:1.6}
p{margin:0 0 18px}
p:last-child{margin-bottom:0}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-700)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--brand-600);outline-offset:2px;border-radius:var(--r-s);
}
img{max-width:100%;display:block;height:auto}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 var(--gutter);width:100%}
.mono{font-family:var(--font-mono)}
.section{padding:var(--sec-pad) 0}
.section-alt{background:var(--paper)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--body);margin:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--brand-700);
  background:var(--brand-100);border-radius:var(--r-s);
  padding:5px 12px;margin-bottom:16px;font-weight:600;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand-600);display:block}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--deep);color:#C8D6D3;font-size:13px;height:36px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-domain{font-family:var(--font-mono);color:#8FB3AC;letter-spacing:.02em}
.topbar-tip{color:#9FB5B1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.topbar-right a{color:#D7E5E2;font-size:13px}
.topbar-right a:hover{color:#fff}
.topbar-sep{width:1px;height:12px;background:rgba(255,255,255,.22);display:block}

/* ============ 主导航 ============ */
.site-header{position:sticky;top:0;z-index:60}
.navbar{background:var(--paper);border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled .navbar{box-shadow:var(--sh-1)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700}
.logo:hover{color:var(--ink)}
.logo-mark{
  display:grid;grid-template-columns:repeat(3,4px);grid-template-rows:repeat(3,4px);gap:2px;
  padding:4px;border-radius:var(--r-s);background:var(--brand-100);
}
.logo-mark i{width:4px;height:4px;border-radius:1px;background:var(--brand-600);display:block}
.logo-mark.on-dark{background:rgba(255,255,255,.1)}
.logo-mark.on-dark i{background:#6FD3C2}
.logo-text{font-size:18px;letter-spacing:.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav ul a{
  position:relative;display:block;padding:22px 0;font-size:17px;font-weight:500;color:var(--ink);
}
.main-nav ul a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.main-nav ul a:hover{color:var(--brand-600)}
.main-nav ul a:hover::after,.main-nav ul a.active::after{transform:scaleX(1)}
.main-nav ul a.active{color:var(--brand-700)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-m);
  font-size:16px;font-weight:600;line-height:1;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-accent{background:var(--accent);color:#3A1D02}
.btn-accent:hover{background:#DE7A2C;color:#3A1D02;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-outline{border-color:var(--line);color:var(--ink);background:var(--paper)}
.btn-outline:hover{border-color:var(--brand-600);color:var(--brand-700)}
.btn-sm{height:38px;padding:0 16px;font-size:15px}
.nav-cta{height:40px;padding:0 18px;font-size:15px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-s);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ 分类页首屏 ============ */
.cat-hero{
  position:relative;
  background-color:var(--deep);
  background-image:linear-gradient(100deg,rgba(10,30,28,.95) 0%,rgba(10,40,36,.88) 52%,rgba(12,54,48,.72) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  color:#E6F1EF;
  padding:64px 0 56px;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(14,143,126,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(14,143,126,.10) 1px,transparent 1px);
  background-size:52px 52px;
  opacity:.7;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),rgba(0,0,0,0));
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),rgba(0,0,0,0));
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#9FB5B1;margin-bottom:24px}
.breadcrumb a{color:#BEDAD5}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:#6D8A86}
.breadcrumb .current{color:#fff;font-weight:600}
.cat-hero h1{color:#fff;max-width:820px;margin-bottom:18px}
.cat-hero .hero-lead{color:#C6DAD6;font-size:18px;max-width:700px;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center}
.hero-meta .meta-item{display:flex;align-items:baseline;gap:8px;color:#A9C4BF;font-size:14px}
.hero-meta .meta-num{font-family:var(--font-mono);font-size:28px;color:#6FD3C2;font-weight:600;line-height:1}
.hero-meta .meta-num em{font-style:normal;font-size:15px;margin-left:2px;color:#8FB3AC}
.hero-divider{width:1px;height:28px;background:rgba(255,255,255,.18)}

/* ============ 筛选标签行 ============ */
.filter-bar{background:var(--paper);border-bottom:1px solid var(--line)}
.filter-inner{display:flex;align-items:center;gap:20px;padding:18px 0;flex-wrap:wrap}
.filter-label{font-size:14px;color:var(--muted);flex:0 0 auto}
.filter-tabs{display:flex;flex-wrap:wrap;gap:10px}
.tab{
  display:inline-flex;align-items:center;gap:7px;
  height:38px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:var(--paper);
  color:var(--body);font-size:15px;font-weight:500;
  transition:all .18s ease;
}
.tab:hover{border-color:var(--brand-600);color:var(--brand-700);transform:translateY(-1px)}
.tab.is-active{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.tab .count{font-family:var(--font-mono);font-size:12px;opacity:.75}

/* ============ 案例卡列表 ============ */
.case-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:32px;align-items:start;
}
.case-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.case-grid .case-card:nth-child(even){margin-top:34px}
.case-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--brand-100)}
.case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.case-card:hover .case-thumb img{transform:scale(1.03)}
.thumb-tag{
  position:absolute;left:14px;top:14px;
  background:rgba(10,63,58,.86);color:#BFF0E6;
  font-size:13px;padding:4px 10px;border-radius:var(--r-s);
  backdrop-filter:saturate(120%);
}
.case-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:14px;flex:1}
.case-title{font-size:20px;line-height:1.5;color:var(--ink)}
.case-desc{color:var(--body);font-size:16px;margin:0}
.metrics{display:flex;gap:28px;flex-wrap:wrap;padding-top:4px}
.metric{display:flex;flex-direction:column;gap:2px}
.metric .num{font-family:var(--font-mono);font-size:30px;line-height:1.1;color:var(--accent);font-weight:600}
.metric .num small{font-size:15px;margin-left:2px}
.metric .lbl{font-size:13px;color:var(--muted)}
.case-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.case-foot .tags{display:flex;gap:8px;flex-wrap:wrap}
.badge{
  display:inline-flex;align-items:center;
  background:var(--brand-100);color:var(--brand-700);
  font-size:13px;padding:4px 10px;border-radius:var(--r-s);font-weight:500;
}
.case-link{font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.case-link::after{content:"→";transition:transform .18s ease;display:inline-block}
.case-link:hover::after{transform:translateX(3px)}

/* ============ 通栏引用块 ============ */
.quote-band{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0}
.quote-box{
  max-width:960px;margin:0 auto;border-left:4px solid var(--brand-600);
  padding:6px 0 6px 28px;
}
.quote-box blockquote{
  margin:0;font-size:26px;line-height:1.6;color:var(--ink);font-weight:600;
}
.quote-box .quote-from{
  margin-top:16px;font-size:14px;color:var(--muted);font-family:var(--font-mono);
}

/* ============ 指标概览 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.stat-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);
  padding:26px 24px;box-shadow:var(--sh-1);
}
.stat-card .stat-num{font-family:var(--font-mono);font-size:34px;color:var(--brand-700);font-weight:600;line-height:1.1}
.stat-card .stat-num small{font-size:16px;margin-left:2px}
.stat-card h3{font-size:17px;margin:12px 0 6px}
.stat-card p{font-size:15px;color:var(--muted);margin:0}

/* ============ 复盘方法 ============ */
.review-layout{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:start}
.review-left h2{margin-bottom:16px}
.review-left p{color:var(--body)}
.review-left .btn{margin-top:24px}
.review-list{display:flex;flex-direction:column;gap:18px}
.review-item{
  display:flex;gap:18px;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r-m);padding:22px 24px;box-shadow:var(--sh-1);
  transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.review-item:hover{border-color:var(--brand-600);box-shadow:var(--sh-2);transform:translateY(-2px)}
.review-item .idx{
  flex:0 0 40px;height:40px;border-radius:var(--r-s);background:var(--brand-100);
  color:var(--brand-700);font-family:var(--font-num);font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.review-item h3{font-size:18px;margin-bottom:6px}
.review-item p{font-size:15.5px;color:var(--body);margin:0}

/* ============ 场景延伸 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
.scene-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-l);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.scene-card:hover{transform:translateY(-2px);border-color:var(--brand-600);box-shadow:var(--sh-2)}
.scene-card .scene-img{aspect-ratio:4/3;overflow:hidden}
.scene-card .scene-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.scene-card:hover .scene-img img{transform:scale(1.03)}
.scene-card .scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-card h3{font-size:18px}
.scene-card p{font-size:15.5px;margin:0;color:var(--body)}
.scene-card .scene-foot{margin-top:auto;padding-top:14px}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-m);
  margin-bottom:14px;box-shadow:var(--sh-1);overflow:hidden;
}
.faq-item[open]{border-color:var(--brand-600)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:20px 24px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-q{font-size:18px;font-weight:600;color:var(--ink);line-height:1.6}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand-600);border-radius:2px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;transition:transform .2s ease}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-a{padding:0 24px 22px;background:var(--bg);border-top:1px solid var(--line)}
.faq-a p{padding-top:18px;margin:0;color:var(--body)}

/* ============ 窄 CTA ============ */
.cta-band{
  background-color:var(--deep);
  background-image:linear-gradient(90deg,rgba(10,40,36,.92),rgba(14,60,53,.82)),
    linear-gradient(rgba(14,143,126,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(14,143,126,.14) 1px,transparent 1px);
  background-size:auto,48px 48px,48px 48px;
  padding:56px 0;
  color:#DDEAE7;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{color:#fff;font-size:26px;margin-bottom:8px}
.cta-inner p{margin:0;color:#A9C4BF;font-size:16px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--deep);color:#9FB5B1;font-size:15px}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 48px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:#8FA8A4;font-size:14.5px;margin:0;max-width:280px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li,.footer-col a{color:#9FB5B1;font-size:14.5px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0}
.footer-bottom .container{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-bottom span{font-size:13px;color:#7C8B89}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  :root{--gutter:28px}
  .main-nav ul{gap:20px}
  .main-nav ul a{font-size:16px}
}
@media (max-width:992px){
  :root{--sec-pad:64px}
  h1{font-size:34px}
  h2{font-size:26px}
  .hero-meta .meta-num{font-size:24px}
  .case-grid{grid-template-columns:1fr}
  .case-grid .case-card:nth-child(even){margin-top:0}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .review-layout{grid-template-columns:1fr;gap:32px}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:768px){
  :root{--sec-pad:52px;--gutter:24px}
  body{font-size:16px;line-height:1.8}
  h1{font-size:28px}
  h2{font-size:23px}
  h3{font-size:19px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;left:0;right:0;top:104px;bottom:0;
    background:var(--paper);flex-direction:column;align-items:stretch;
    padding:12px 24px 32px;gap:0;overflow-y:auto;
    transform:translateY(-12px);opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .2s ease,transform .2s ease,visibility .2s;
    border-top:1px solid var(--line);
  }
  .main-nav.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .main-nav ul li{border-bottom:1px solid var(--line)}
  .main-nav ul a{padding:0;height:52px;display:flex;align-items:center;font-size:17px}
  .main-nav ul a::after{display:none}
  .main-nav ul a.active{color:var(--brand-700)}
  .nav-cta{width:100%;height:48px;margin-top:22px}
  .topbar-tip{display:none}
  .cat-hero{padding:44px 0 40px}
  .cat-hero .hero-lead{font-size:16.5px}
  .hero-divider{display:none}
  .quote-box{padding-left:18px}
  .quote-box blockquote{font-size:20px}
  .scene-grid{grid-template-columns:1fr}
  .filter-inner{padding:14px 0}
  .faq-q{font-size:16.5px}
  .faq-item summary{padding:18px 18px}
  .faq-a{padding:0 18px 18px}
  .cta-inner h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{padding:48px 0 36px}
}
@media (max-width:576px){
  :root{--gutter:16px}
  h1{font-size:26px}
  .stat-grid{grid-template-columns:1fr}
  .metrics{gap:20px}
  .metric .num{font-size:26px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;gap:6px}
}
@media (min-width:1440px){
  .container{max-width:1280px}
}

/* roulang page: category4 */
/* ===== 设计变量 ===== */
:root{
  --brand-900:#0A3F3A;
  --brand-700:#0B6E62;
  --brand-600:#0E8F7E;
  --brand-100:#E4F4F1;
  --accent:#F08A3C;
  --deep:#0E1F1E;
  --paper:#FFFFFF;
  --bg:#F6F9F8;
  --ink:#10201E;
  --body:#43514F;
  --muted:#7C8B89;
  --line:#E4EAE8;
  --ok:#16A34A;
  --warn:#D98A1F;
  --danger:#C9453F;

  --r-s:6px;
  --r-m:10px;
  --r-l:16px;

  --sh-1:0 1px 2px rgba(16,32,30,.04);
  --sh-2:0 10px 28px rgba(16,32,30,.08);

  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--brand-600);text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease;}
a:hover{color:var(--brand-700);}
img{max-width:100%;display:block;}
button{font-family:inherit;font-size:inherit;color:inherit;border:0;background:none;cursor:pointer;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

/* ===== 容器 ===== */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
@media (min-width:1440px){ .container{max-width:1280px;} }

/* ===== 通用按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--r-m);
  font-size:16px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(240,138,60,.24);}
.btn-primary:hover{background:#DE7A2C;color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(240,138,60,.3);}
.btn-brand{background:var(--brand-600);color:#fff;}
.btn-brand:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);}
.btn-outline{background:transparent;border-color:var(--line);color:var(--brand-700);}
.btn-outline:hover{border-color:var(--brand-600);background:var(--brand-100);color:var(--brand-700);}
.btn-ghost-light{background:transparent;border-color:rgba(255,255,255,.42);color:#fff;}
.btn-ghost-light:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff;}
.btn-block{width:100%;}
.btn-sm{height:42px;padding:0 18px;font-size:15px;}

/* ===== 顶部信息条 ===== */
.site-header{position:sticky;top:0;z-index:80;}
.topbar{background:var(--deep);color:rgba(255,255,255,.8);font-size:13px;}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:36px;
}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0;}
.topbar-domain{font-family:var(--font-mono);color:rgba(255,255,255,.62);letter-spacing:.02em;}
.topbar-tip{color:rgba(255,255,255,.78);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-right{display:flex;align-items:center;gap:12px;}
.topbar-right a{color:rgba(255,255,255,.84);font-size:13px;}
.topbar-right a:hover{color:#fff;}
.topbar-sep{width:1px;height:13px;background:rgba(255,255,255,.24);}

/* ===== 主导航 ===== */
.navbar{background:var(--paper);border-bottom:1px solid var(--line);transition:box-shadow .2s ease;}
.site-header.is-scrolled .navbar{box-shadow:var(--sh-1);}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:18px;}
.logo:hover{color:var(--brand-700);}
.logo-mark{
  display:grid;
  grid-template-columns:repeat(3,4px);
  grid-template-rows:repeat(3,4px);
  gap:3px;
  width:18px;
  height:18px;
  flex:0 0 18px;
  align-content:center;
  justify-content:center;
}
.logo-mark i{display:block;width:4px;height:4px;border-radius:50%;background:var(--brand-600);}
.logo-mark i:nth-child(5){background:var(--accent);}
.logo-mark.on-dark i{background:rgba(255,255,255,.5);}
.logo-mark.on-dark i:nth-child(5){background:var(--accent);}
.logo-text{white-space:nowrap;}

.main-nav{display:flex;align-items:center;gap:28px;}
.main-nav ul{display:flex;align-items:center;gap:26px;}
.main-nav ul li a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:17px;
  font-weight:500;
  color:var(--ink);
}
.main-nav ul li a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.main-nav ul li a:hover{color:var(--brand-600);}
.main-nav ul li a:hover::after{transform:scaleX(1);}
.main-nav ul li a.active{color:var(--brand-700);font-weight:600;}
.main-nav ul li a.active::after{transform:scaleX(1);}
.nav-cta{height:44px;padding:0 20px;font-size:15px;}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:space-between;
  width:24px;
  height:18px;
  padding:0;
  z-index:90;
}
.nav-toggle span{display:block;width:24px;height:2px;border-radius:2px;background:var(--ink);transition:transform .2s ease,opacity .2s ease;}

/* ===== 面包屑 ===== */
.breadcrumb{background:var(--paper);border-bottom:1px solid var(--line);}
.breadcrumb ol{display:flex;align-items:center;gap:8px;height:44px;font-size:13px;color:var(--muted);}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .sep{color:#C4CFCD;}
.breadcrumb .current{color:var(--ink);font-weight:600;}

/* ===== 页面 Hero ===== */
.page-hero{position:relative;background:var(--deep);color:#fff;overflow:hidden;}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  opacity:.34;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(14,31,30,.72) 0%,rgba(14,31,30,.9) 100%),
    repeating-linear-gradient(0deg,rgba(228,244,241,.05) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(90deg,rgba(228,244,241,.05) 0 1px,transparent 1px 64px);
}
.page-hero .container{position:relative;z-index:1;padding-top:64px;padding-bottom:64px;}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.08em;
  color:#9EE0D3;
  border:1px solid rgba(158,224,211,.32);
  border-radius:999px;
  padding:4px 14px;
  margin-bottom:20px;
}
.page-hero h1{
  color:#fff;
  font-size:40px;
  line-height:1.25;
  max-width:820px;
}
.page-hero .hero-sub{
  margin-top:16px;
  max-width:700px;
  font-size:17px;
  line-height:1.85;
  color:rgba(255,255,255,.78);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:28px;
  margin-top:36px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.14);
}
.hero-stats .stat{display:flex;flex-direction:column;gap:2px;}
.hero-stats .stat strong{font-family:var(--font-num);font-size:24px;color:#fff;line-height:1.3;}
.hero-stats .stat span{font-size:13px;color:rgba(255,255,255,.6);}

/* ===== 板块通用 ===== */
.section{padding:88px 0;}
.section.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{font-size:30px;line-height:1.35;}
.section-head p{margin-top:12px;color:var(--body);}
.section-head .eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:var(--r-s);
  padding:3px 10px;
  margin-bottom:12px;
}
.section-head.row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  max-width:none;
}
.text-link{font-weight:600;font-size:15px;color:var(--brand-700);display:inline-flex;align-items:center;gap:6px;}
.text-link:hover{color:var(--brand-600);}

/* ===== 价格对比表 ===== */
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--r-l);
  background:var(--paper);
  box-shadow:var(--sh-1);
  -webkit-overflow-scrolling:touch;
}
table.compare{min-width:760px;font-size:15px;}
table.compare th,
table.compare td{
  padding:16px 20px;
  text-align:left;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.compare thead th{
  position:sticky;
  top:0;
  z-index:2;
  background:var(--brand-100);
  color:var(--brand-900);
  font-size:15px;
  font-weight:700;
  border-bottom:1px solid #CFE6E0;
}
table.compare thead th:first-child{color:var(--body);font-weight:600;background:var(--bg);}
table.compare tbody th{
  font-weight:600;
  color:var(--ink);
  background:var(--paper);
}
table.compare tbody td{color:var(--body);}
table.compare .col-featured{background:#F1FAF8;}
table.compare thead th.col-featured{background:#D6EFE9;color:var(--brand-900);}
table.compare tbody tr:last-child th,
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare .yes{color:var(--ok);font-weight:600;}
table.compare .no{color:#A9B4B2;}
.table-note{margin-top:14px;font-size:13px;color:var(--muted);}

/* ===== 定价卡 ===== */
.price-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:stretch;
}
.price-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-1);
  padding:26px 24px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-600);}
.price-card.is-featured{
  border-color:var(--brand-600);
  box-shadow:var(--sh-2);
  padding-top:30px;
}
.price-card.is-featured::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:4px;
  background:var(--brand-600);
  border-radius:var(--r-l) var(--r-l) 0 0;
}
.price-badge{
  position:absolute;
  top:-13px;
  right:22px;
  background:var(--accent);
  color:#fff;
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  padding:3px 12px;
  border-radius:999px;
  box-shadow:0 4px 10px rgba(240,138,60,.28);
}
.price-card h3{font-size:21px;}
.price-card .price-desc{margin-top:6px;font-size:14px;color:var(--muted);}
.price-amount{display:flex;align-items:baseline;gap:6px;margin-top:18px;}
.price-num{font-family:var(--font-num);font-size:38px;font-weight:700;color:var(--ink);line-height:1.1;}
.price-unit{font-size:14px;color:var(--muted);}
.price-list{margin-top:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.price-list li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  color:var(--body);
  line-height:1.7;
}
.price-list li::before{
  content:"";
  position:absolute;
  left:2px;top:9px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand-600);
}
.price-card .btn{margin-top:24px;}

/* ===== 费用说明（图文） ===== */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.split .media{
  border-radius:var(--r-l);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  aspect-ratio:5/4;
}
.split .media img{width:100%;height:100%;object-fit:cover;}
.split h2{font-size:30px;line-height:1.35;}
.split .lead{margin-top:14px;}
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:14px;}
.check-list li{
  position:relative;
  padding-left:34px;
  font-size:16px;
  color:var(--body);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:6px;
  width:20px;height:20px;
  border-radius:50%;
  background:var(--brand-100);
  border:1px solid #CFE6E0;
}
.check-list li::after{
  content:"";
  position:absolute;
  left:7px;top:8px;
  width:6px;height:9px;
  border-right:2px solid var(--brand-700);
  border-bottom:2px solid var(--brand-700);
  transform:rotate(40deg);
}
.split .actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:#CFE0DC;}
.faq-item.is-open{border-color:var(--brand-600);box-shadow:var(--sh-2);}
.faq-q{margin:0;}
.faq-toggle{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:20px 24px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  line-height:1.6;
}
.faq-toggle:hover{color:var(--brand-700);}
.faq-icon{
  position:relative;
  flex:0 0 20px;
  width:20px;
  height:20px;
  border-radius:50%;
  background:var(--brand-100);
  transition:background-color .2s ease;
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--brand-700);
  transform:translate(-50%,-50%);
  border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{width:10px;height:2px;}
.faq-icon::after{width:2px;height:10px;}
.faq-toggle[aria-expanded="true"] .faq-icon{background:#D6EFE9;}
.faq-toggle[aria-expanded="true"] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-a{
  padding:0 24px 22px;
  background:var(--bg);
  border-top:1px solid var(--line);
  color:var(--body);
  font-size:16px;
  line-height:1.85;
}
.faq-a p{padding-top:18px;}

/* ===== 窄 CTA ===== */
.cta-band{
  position:relative;
  background:var(--deep);
  color:#fff;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(circle at 12% 30%,rgba(14,143,126,.28),transparent 55%),
    repeating-linear-gradient(45deg,rgba(228,244,241,.05) 0 1px,transparent 1px 14px);
  opacity:.9;
}
.cta-inner{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:44px 0;
}
.cta-inner h2{color:#fff;font-size:26px;line-height:1.4;}
.cta-inner p{margin-top:8px;font-size:15px;color:rgba(255,255,255,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--deep);color:rgba(255,255,255,.7);font-size:15px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-top:64px;
  padding-bottom:44px;
}
.footer-brand .logo{color:#fff;font-size:17px;}
.footer-brand .logo:hover{color:#fff;}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:280px;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:14px;color:rgba(255,255,255,.62);}
.footer-col a{color:rgba(255,255,255,.72);font-size:14px;}
.footer-col a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);}
.footer-bottom .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:18px;
  padding-bottom:18px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ===== 响应式 ===== */
@media (max-width:1200px){
  .section{padding:76px 0;}
}
@media (max-width:992px){
  .container{padding:0 24px;}
  .section{padding:64px 0;}
  .page-hero .container{padding-top:52px;padding-bottom:52px;}
  .page-hero h1{font-size:34px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split .media{order:-1;aspect-ratio:16/9;}
  .price-grid{grid-template-columns:1fr;gap:20px;}
  .price-card.is-featured{padding-top:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-inner{flex-direction:column;align-items:flex-start;text-align:left;}

  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;
    inset:0;
    background:var(--paper);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:88px 24px 32px;
    transform:translateX(100%);
    transition:transform .26s ease;
    overflow-y:auto;
    z-index:60;
    box-shadow:var(--sh-2);
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;}
  .main-nav ul li{border-bottom:1px solid var(--line);}
  .main-nav ul li a{display:block;height:44px;line-height:44px;font-size:16px;padding:0;}
  .main-nav ul li a::after{display:none;}
  .main-nav ul li a.active{color:var(--brand-700);}
  .nav-cta{margin-top:24px;width:100%;height:50px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .section{padding:52px 0;}
  .page-hero h1{font-size:30px;}
  .hero-stats{gap:20px;row-gap:14px;}
  .section-head h2{font-size:24px;}
  .split h2{font-size:24px;}
  .faq-toggle{font-size:16px;padding:18px 18px;}
  .faq-a{padding:0 18px 20px;}
  .cta-inner h2{font-size:22px;}
  .topbar-tip{display:none;}
}
@media (max-width:576px){
  .container{padding:0 16px;}
  .page-hero h1{font-size:26px;}
  .page-hero .hero-sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{flex-direction:column;align-items:flex-start;gap:14px;}
  .hero-stats .stat strong{font-size:22px;}
  .price-num{font-size:32px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-top:48px;}
  .footer-bottom .container{flex-direction:column;align-items:flex-start;gap:6px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .table-scroll{border-radius:var(--r-m);}
}