/* roulang page: index */
:root{
  --ink-900:#060A14;
  --ink-800:#0B1224;
  --ink-700:#121B33;
  --line:rgba(255,255,255,.10);
  --primary:#2FD8FF;
  --primary-deep:#12A9E6;
  --accent:#7C5CFF;
  --warm:#FFB457;
  --text-hi:#EAF2FF;
  --text-mid:#9FB0CC;
  --text-low:#67789A;
  --radius-card:16px;
  --radius-lg:22px;
  --radius-btn:12px;
  --shadow-card:0 24px 60px rgba(0,0,0,.45);
  --shadow-glow:0 8px 30px rgba(47,216,255,.35);
  --container:1200px;
  --sp:8px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-mid);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.04;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:3px 3px;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:#7BE7FF;text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--text-hi);margin:0 0 16px;line-height:1.25;font-weight:700;letter-spacing:.01em}
h1{font-size:48px}
h2{font-size:32px}
h3{font-size:20px;font-weight:600}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
input,textarea{font-family:inherit}
.num,.metric-num,time{font-variant-numeric:tabular-nums;letter-spacing:.02em}
img{max-width:100%}
.wrap{position:relative;z-index:1}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0;position:relative}
.section--tint{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,0))}
.section--solid{background:var(--ink-900)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.16em;color:var(--primary);
  text-transform:uppercase;margin-bottom:18px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:2px}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-desc{color:var(--text-mid);font-size:16px;margin-bottom:0}
.sec-title{font-size:32px;margin-bottom:14px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,filter .22s ease,color .22s ease;
  text-decoration:none;
}
.btn:hover{text-decoration:none}
.btn-primary{background:linear-gradient(100deg,var(--primary),var(--accent));color:#04121C;box-shadow:0 10px 26px rgba(47,216,255,.2)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:var(--shadow-glow);color:#04121C}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,216,255,.2)}
.btn-ghost{background:transparent;border-color:rgba(47,216,255,.45);color:var(--text-hi)}
.btn-ghost:hover{background:rgba(47,216,255,.08);transform:translateY(-2px);color:var(--text-hi)}
.btn-sm{padding:10px 20px;font-size:14px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;
}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,18,36,.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{background:rgba(6,10,20,.86);border-bottom-color:var(--line);box-shadow:0 12px 40px rgba(0,0,0,.4)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  color:#04121C;font-weight:700;font-size:16px;
  box-shadow:0 8px 22px rgba(47,216,255,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{color:var(--text-hi);font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-sub{color:var(--text-low);font-size:11px;letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{
  color:var(--text-mid);font-size:15px;font-weight:500;
  padding:9px 16px;border-radius:10px;text-decoration:none;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--text-hi);background:rgba(255,255,255,.06);text-decoration:none}
.nav-links a.is-active{color:var(--primary);background:rgba(47,216,255,.12)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-ghost{color:var(--text-mid);font-size:15px;font-weight:500}
.nav-ghost:hover{color:var(--primary);text-decoration:none}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:11px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  color:var(--text-hi);font-size:17px;cursor:pointer;
}
.mobile-menu{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(6,10,20,.96);
  padding:12px 0 18px;
}
body.menu-open .mobile-menu{display:block}
.mobile-menu a{
  display:block;padding:13px 4px;color:var(--text-mid);font-size:16px;
  border-bottom:1px solid rgba(255,255,255,.06);text-decoration:none;
}
.mobile-menu a:last-child{border-bottom:0}
.mobile-menu a.is-active{color:var(--primary)}

/* 底部 Tab */
.bottom-tabs{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:rgba(6,10,20,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  padding:8px 8px calc(8px + env(safe-area-inset-bottom));
  justify-content:space-around;
  align-items:center;
}
.bottom-tabs a{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  flex:1;padding:6px 2px;border-radius:10px;
  color:var(--text-low);font-size:11px;text-decoration:none;line-height:1.2;
  transition:color .2s ease,background .2s ease;
}
.bottom-tabs a i{font-size:17px}
.bottom-tabs a.is-active{color:var(--primary);background:rgba(47,216,255,.1);text-shadow:0 0 12px rgba(47,216,255,.5)}
.bottom-tabs a:hover{text-decoration:none}

/* Hero */
.hero{
  position:relative;
  padding:84px 0 96px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;top:-160px;right:-120px;width:620px;height:620px;
  background:radial-gradient(circle,rgba(47,216,255,.16),transparent 68%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:48px;letter-spacing:-.01em;margin-bottom:20px}
.hero-sub{font-size:17px;color:var(--text-mid);max-width:520px;margin-bottom:32px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px}
.stat-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 15px;border-radius:999px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  font-size:13px;color:var(--text-mid);
}
.stat-badge strong{color:var(--warm);font-weight:600;font-size:14px}
.hero-panel{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(6,10,20,.35),rgba(6,10,20,.82)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-card);
  padding:28px;
  min-height:380px;
  display:flex;flex-direction:column;justify-content:flex-end;
}
.glass-card{
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-card);
  padding:22px;
}
.glass-card h3{font-size:17px;margin-bottom:10px}
.glass-card p{font-size:14px;color:var(--text-mid);margin-bottom:16px;line-height:1.7}
.status-list{display:flex;flex-direction:column;gap:12px}
.status-item{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-mid)}
.status-item span:last-child{color:var(--primary);font-weight:600}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px rgba(47,216,255,.8);margin-right:8px}
.dot.warm{background:var(--warm);box-shadow:0 0 10px rgba(255,180,87,.8)}

/* 能力条 */
.cap-list{display:flex;flex-direction:column;gap:14px}
.cap-row{
  display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:20px;align-items:center;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px 26px;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.cap-row:hover{transform:translateY(-2px);border-color:rgba(47,216,255,.35);box-shadow:0 18px 44px rgba(0,0,0,.5)}
.cap-icon{
  width:48px;height:48px;border-radius:14px;
  background:rgba(47,216,255,.12);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:19px;
}
.cap-body h3{font-size:18px;margin-bottom:6px}
.cap-body p{margin:0;font-size:14px;color:var(--text-mid)}
.tag{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.tag--cyan{background:rgba(47,216,255,.12);color:var(--primary)}
.tag--warm{background:rgba(255,180,87,.14);color:var(--warm)}
.tag--violet{background:rgba(124,92,255,.16);color:#B3A3FF}

/* 三步 */
.steps-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px}
.steps-aside{position:sticky;top:104px;align-self:start}
.steps-aside h2{font-size:32px;margin-bottom:14px}
.steps-aside p{font-size:15px;margin-bottom:24px}
.step-row{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1fr) 132px;gap:28px;align-items:center;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--ink-700);
  padding:30px 28px 30px 34px;
  margin-bottom:18px;
  overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.step-row:hover{transform:translateY(-2px);border-color:rgba(47,216,255,.3);box-shadow:0 18px 44px rgba(0,0,0,.5)}
.step-row:nth-child(2){margin-left:22px}
.step-row:nth-child(3){margin-left:44px}
.step-num{
  position:absolute;top:6px;right:20px;
  font-size:80px;font-weight:700;line-height:1;
  color:rgba(255,255,255,.05);letter-spacing:-.03em;
}
.step-row h3{font-size:20px;margin-bottom:8px}
.step-row p{margin:0;font-size:15px;color:var(--text-mid);max-width:520px}
.step-thumb{
  width:132px;height:96px;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);position:relative;z-index:1;
}
.step-thumb img{width:100%;height:100%;object-fit:cover}

/* 案例 */
.case-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;margin-bottom:72px}
.case-row.is-reverse .case-media{order:2}
.case-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;box-shadow:var(--shadow-card)}
.case-media img{width:100%;height:100%;object-fit:cover}
.case-body h3{font-size:24px;margin-bottom:14px}
.case-body p{font-size:15px;margin-bottom:24px}
.metrics{display:flex;flex-wrap:wrap;gap:28px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:20px}
.metric{min-width:110px}
.metric-num{display:block;font-size:30px;font-weight:700;color:var(--warm);line-height:1.1}
.metric-label{font-size:13px;color:var(--text-low)}
.case-note{font-size:14px;color:var(--text-mid);margin:0;padding-left:14px;border-left:2px solid var(--primary)}

/* FAQ */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px;align-items:start}
.faq-aside h2{font-size:32px;margin-bottom:14px}
.faq-aside p{font-size:15px;margin-bottom:24px}
.accordion.glass-acc{border:0;background:transparent}
.glass-acc .accordion-item{
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  margin-bottom:14px;
  overflow:hidden;
}
.glass-acc .accordion-title{
  background:transparent;border:0;
  color:var(--text-hi);font-size:17px;font-weight:600;
  padding:20px 56px 20px 24px;line-height:1.5;
  transition:background .2s ease,color .2s ease;
}
.glass-acc .accordion-title:hover{background:rgba(47,216,255,.07);color:#fff}
.glass-acc .accordion-title::before{
  color:var(--primary);font-size:22px;font-weight:400;
  right:22px;top:50%;margin-top:-14px;
  transition:transform .25s ease;
}
.glass-acc .accordion-item.is-active .accordion-title::before{transform:rotate(180deg)}
.glass-acc .accordion-content{
  background:transparent;border:0;
  color:var(--text-mid);font-size:15px;line-height:1.8;
  padding:0 24px 22px;border-top:1px solid rgba(255,255,255,.06);
  padding-top:16px;
}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.news-card{
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(47,216,255,.4);box-shadow:0 18px 46px rgba(0,0,0,.55),0 0 0 1px rgba(47,216,255,.18)}
.news-card.is-lead{grid-column:span 2;grid-row:span 2}
.card-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:#0d1526}
.news-card.is-lead .card-cover{aspect-ratio:16/8}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .card-cover img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:17px;margin-bottom:10px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body h3 a{color:var(--text-hi);text-decoration:none}
.card-body h3 a:hover{color:var(--primary);text-decoration:none}
.card-excerpt{font-size:14px;color:var(--text-mid);margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;font-size:13px;color:var(--text-low);border-top:1px solid var(--line);padding-top:14px}
.card-meta .m-left{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}
.card-arrow{color:var(--primary);font-size:14px}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;text-align:center;
  border:1px dashed rgba(255,255,255,.16);
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.02);
  padding:40px 24px;
}
.empty-state i{font-size:26px;color:var(--primary)}
.empty-state p{margin:0;font-size:15px;color:var(--text-mid)}

/* CTA 条带 */
.cta-band{
  position:relative;
  padding:96px 0;
  background-image:linear-gradient(90deg,rgba(6,10,20,.92),rgba(6,10,20,.7)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,440px);gap:56px;align-items:start}
.cta-copy h2{font-size:32px;margin-bottom:16px}
.cta-copy p{font-size:15px;max-width:460px}
.cta-points{display:flex;flex-direction:column;gap:12px;margin-top:26px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-mid)}
.cta-points i{color:var(--primary);margin-top:6px;font-size:12px}
.form-card{
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-lg);
  padding:28px;
  box-shadow:var(--shadow-card);
}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-hint{font-size:13px;color:var(--text-low);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-mid);margin-bottom:8px;font-weight:500}
.field input,.field textarea{
  width:100%;display:block;
  background:rgba(6,10,20,.6);
  border:1px solid var(--line);
  border-radius:12px;
  padding:12px 14px;
  color:var(--text-hi);
  font-size:15px;
  line-height:1.5;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{resize:vertical;min-height:88px}
.field input::placeholder,.field textarea::placeholder{color:var(--text-low)}
.field input:focus,.field textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,216,255,.16);
  outline:none;
}
.form-card .btn{width:100%;margin-top:6px}
.form-note{font-size:12px;color:var(--text-low);margin:16px 0 0;line-height:1.7}
.legal-line{margin-top:22px;font-size:12px;color:var(--text-low)}

/* 页脚 */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 0;position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-col h4{font-size:15px;color:var(--text-hi);margin-bottom:18px;font-weight:600}
.footer-col p{font-size:14px;color:var(--text-low);line-height:1.8}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{color:var(--text-mid);font-size:14px}
.footer-col ul a:hover{color:var(--primary)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--primary)}

/* 响应式 */
@media (max-width:1200px){
  .container{padding:0 26px}
  .hero h1{font-size:44px}
}
@media (max-width:1023px){
  h1{font-size:34px}
  h2,.sec-title,.steps-aside h2,.faq-aside h2,.cta-copy h2{font-size:26px}
  .container{padding:0 24px}
  .section{padding:72px 0}
  .hero{padding:60px 0 72px}
  .hero h1{font-size:34px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .steps-layout,.faq-layout{grid-template-columns:1fr;gap:36px}
  .steps-aside{position:static}
  .step-row:nth-child(2),.step-row:nth-child(3){margin-left:0}
  .case-row{grid-template-columns:1fr;gap:32px;margin-bottom:56px}
  .case-row.is-reverse .case-media{order:0}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-card.is-lead{grid-column:span 2;grid-row:auto}
  .cta-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-links,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .bottom-tabs{display:flex}
  body{padding-bottom:80px}
  .cta-band{padding:72px 0}
}
@media (max-width:639px){
  h1,.hero h1{font-size:28px}
  h2,.sec-title,.steps-aside h2,.faq-aside h2,.cta-copy h2{font-size:22px}
  h3{font-size:17px}
  body{font-size:15px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero{padding:44px 0 56px}
  .nav-inner{height:64px}
  .hero-cta .btn{width:100%}
  .badge-row{flex-direction:column;align-items:flex-start}
  .cap-row{grid-template-columns:44px minmax(0,1fr);row-gap:12px;padding:20px}
  .cap-row .tag{grid-column:2}
  .cap-icon{width:42px;height:42px;border-radius:12px;font-size:17px}
  .step-row{grid-template-columns:1fr;padding:24px 22px}
  .step-thumb{width:100%;height:150px}
  .step-num{font-size:58px;top:2px;right:16px}
  .metrics{gap:18px}
  .metric-num{font-size:24px}
  .news-grid{grid-template-columns:1fr}
  .news-card.is-lead{grid-column:span 1}
  .case-body h3{font-size:20px}
  .form-card{padding:22px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-band{padding:56px 0}
}

/* roulang page: article */
:root{
  --ink-900:#060A14;
  --ink-800:#0B1224;
  --ink-700:#121B33;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --primary:#2FD8FF;
  --primary-deep:#12A9E6;
  --accent:#7C5CFF;
  --warm:#FFB457;
  --text-hi:#EAF2FF;
  --text-mid:#9FB0CC;
  --text-low:#67789A;
  --glass:rgba(255,255,255,.055);
  --radius-card:16px;
  --radius-lg:22px;
  --radius-btn:12px;
  --shadow-card:0 24px 60px rgba(0,0,0,.45);
  --shadow-glow:0 8px 30px rgba(47,216,255,.30);
  --container:1200px;
  --space-s:16px;
  --space-m:24px;
  --space-l:40px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text-mid);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(900px 520px at 82% -12%, rgba(47,216,255,.11), transparent 62%),
    radial-gradient(760px 500px at 2% 26%, rgba(124,92,255,.11), transparent 62%),
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:auto, auto, 48px 48px, 48px 48px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:#7FE6FF;}
h1,h2,h3,h4{color:var(--text-hi);margin:0;line-height:1.25;font-weight:700;letter-spacing:.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;padding:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(47,216,255,.28);color:#fff;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,18,36,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.88);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:74px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  flex-shrink:0;
}
.brand:hover{color:inherit;text-decoration:none;}
.brand-mark{
  width:40px;height:40px;flex-shrink:0;
  border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:18px;color:#04141F;
  background:linear-gradient(100deg,var(--primary),var(--accent));
  box-shadow:0 6px 22px rgba(47,216,255,.35);
}
.brand-name{
  display:block;
  font-size:16px;
  font-weight:700;
  color:var(--text-hi);
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand-sub{
  display:block;
  font-size:12px;
  color:var(--text-low);
  letter-spacing:.06em;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-links a{
  display:block;
  padding:10px 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--text-mid);
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{
  color:var(--text-hi);
  background:rgba(255,255,255,.06);
  text-decoration:none;
}
.nav-links a.is-active{
  color:var(--primary);
  background:rgba(47,216,255,.12);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  white-space:nowrap;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{text-decoration:none;}
.btn-primary{
  color:#04141F;
  background:linear-gradient(100deg,var(--primary),var(--accent));
  box-shadow:0 8px 24px rgba(47,216,255,.22);
}
.btn-primary:hover{
  color:#04141F;
  transform:translateY(-2px);
  box-shadow:var(--shadow-glow);
  filter:brightness(1.08);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,216,255,.18);}
.btn-ghost{
  color:#CFE8FF;
  border-color:rgba(47,216,255,.45);
  background:transparent;
}
.btn-ghost:hover{
  color:var(--text-hi);
  background:rgba(47,216,255,.08);
  border-color:rgba(47,216,255,.7);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px;}

/* ============ 移动端顶部条与底部 Tab ============ */
.mobile-top{
  display:none;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  min-height:60px;
}
.mobile-menu-btn{
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:var(--text-hi);
}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  padding:10px 0 18px;
  background:rgba(6,10,20,.96);
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;
  padding:13px 4px;
  font-size:15px;
  color:var(--text-mid);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-drawer a:last-child{border-bottom:0;}
.mobile-drawer a.is-active{color:var(--primary);}
.tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:90;
  grid-template-columns:repeat(3,1fr);
  background:rgba(6,10,20,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  padding:8px 6px calc(8px + env(safe-area-inset-bottom));
}
.tab-item{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  padding:6px 2px;
  font-size:11px;
  color:var(--text-low);
  border-radius:10px;
}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;}
.tab-item:hover{color:var(--text-mid);text-decoration:none;}
.tab-item.is-active{
  color:var(--primary);
  text-shadow:0 0 12px rgba(47,216,255,.55);
}

/* ============ 面包屑 ============ */
.crumbs{
  padding:26px 0 0;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-low);
}
.breadcrumb a{color:var(--text-low);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:rgba(255,255,255,.22);}
.breadcrumb .current{
  color:var(--text-mid);
  max-width:min(560px,60vw);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

/* ============ 文章头部 ============ */
.article-head{padding:22px 0 34px;}
.article-head-inner{
  padding:30px 32px 32px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:
    radial-gradient(620px 260px at 88% -30%, rgba(47,216,255,.16), transparent 70%),
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015));
  box-shadow:var(--shadow-card);
}
.article-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--primary);
  background:rgba(47,216,255,.12);
  border:1px solid rgba(47,216,255,.25);
  margin-bottom:18px;
}
.article-tag.is-warm{
  color:var(--warm);
  background:rgba(255,180,87,.12);
  border-color:rgba(255,180,87,.28);
}
.article-head h1{
  font-size:clamp(28px, 4.1vw, 44px);
  line-height:1.3;
  letter-spacing:.01em;
  max-width:940px;
  word-break:break-word;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:20px;
  font-size:13px;
  color:var(--text-low);
  letter-spacing:.02em;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px;}
.article-meta .meta-item strong{
  color:var(--text-mid);
  font-weight:500;
}
.article-meta time{color:var(--text-mid);font-variant-numeric:tabular-nums;}
.article-meta .dot{
  width:4px;height:4px;border-radius:50%;
  background:rgba(255,255,255,.22);
}

/* ============ 正文布局 ============ */
.article-section{padding:8px 0 88px;}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:48px;
  align-items:start;
}
.article-main{min-width:0;}
.article-body{
  max-width:760px;
  font-size:16px;
  line-height:1.9;
  color:var(--text-mid);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  font-size:24px;
  line-height:1.4;
  margin:2em 0 .85em;
  padding-left:16px;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.2em;
  width:4px;height:1em;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,216,255,.6);
}
.article-body h3{
  font-size:19px;
  line-height:1.45;
  margin:1.7em 0 .6em;
  color:var(--text-hi);
  scroll-margin-top:96px;
}
.article-body h4{
  font-size:17px;
  margin:1.4em 0 .5em;
  color:var(--text-hi);
}
.article-body ul,
.article-body ol{margin:0 0 1.2em;}
.article-body li{
  position:relative;
  padding-left:22px;
  margin-bottom:.55em;
}
.article-body ul > li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px rgba(47,216,255,.65);
}
.article-body ol{counter-reset:artitem;}
.article-body ol > li::before{
  counter-increment:artitem;
  content:counter(artitem);
  position:absolute;
  left:0;top:.35em;
  width:18px;height:18px;
  display:flex;align-items:center;justify-content:center;
  border-radius:6px;
  font-size:11px;
  font-weight:600;
  color:var(--primary);
  background:rgba(47,216,255,.14);
}
.article-body blockquote{
  margin:1.5em 0;
  padding:18px 22px;
  border-left:3px solid var(--primary);
  border-radius:0 12px 12px 0;
  background:rgba(255,255,255,.045);
  color:var(--text-hi);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;
  height:auto;
  aspect-ratio:16 / 9;
  object-fit:cover;
  border-radius:14px;
  border:1px solid var(--line);
  margin:1.4em 0;
}
.article-body a{
  color:var(--primary);
  border-bottom:1px solid rgba(47,216,255,.35);
}
.article-body a:hover{
  color:#7FE6FF;
  border-bottom-color:#7FE6FF;
  text-decoration:none;
}
.article-body hr{
  border:0;
  height:1px;
  background:var(--line);
  margin:2.2em 0;
}
.article-body pre{
  background:rgba(6,10,20,.75);
  border:1px solid var(--line);
  border-radius:12px;
  padding:16px 18px;
  overflow-x:auto;
  font-size:14px;
  line-height:1.7;
  color:#CFE8FF;
  margin:1.4em 0;
}
.article-body code{
  font-family:"SFMono-Regular",Consolas,Menlo,monospace;
  font-size:.92em;
  color:#BFE9FF;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.4em 0;
  font-size:15px;
}
.article-body th,
.article-body td{
  border:1px solid var(--line);
  padding:12px 14px;
  text-align:left;
}
.article-body th{background:rgba(255,255,255,.05);color:var(--text-hi);font-weight:600;}

.empty-state{
  min-height:220px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  text-align:center;
  padding:36px 24px;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius-card);
  background:rgba(255,255,255,.02);
  max-width:760px;
}
.empty-icon{
  width:48px;height:48px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);
  background:rgba(47,216,255,.12);
  border:1px solid rgba(47,216,255,.25);
}
.empty-state p{color:var(--text-mid);font-size:15px;}

/* ============ 侧栏 ============ */
.article-side{
  position:sticky;
  top:96px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.side-card{
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--ink-700);
  padding:22px;
  box-shadow:0 16px 40px rgba(0,0,0,.32);
}
.side-card h3{
  font-size:15px;
  letter-spacing:.04em;
  color:var(--text-hi);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.side-card h3::before{
  content:"";
  width:4px;height:14px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--accent));
}
#tocList li{margin-bottom:2px;}
#tocList a{
  display:block;
  padding:9px 10px;
  border-radius:9px;
  font-size:14px;
  line-height:1.55;
  color:var(--text-mid);
  border-left:2px solid transparent;
}
#tocList a:hover{
  color:var(--text-hi);
  background:rgba(255,255,255,.05);
  border-left-color:rgba(47,216,255,.5);
  text-decoration:none;
}
.side-links li + li{margin-top:10px;}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:11px 13px;
  border-radius:11px;
  font-size:14px;
  color:var(--text-mid);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.side-links a:hover{
  color:var(--text-hi);
  border-color:rgba(47,216,255,.45);
  transform:translateX(2px);
  text-decoration:none;
}
.side-links .arrow{color:var(--primary);font-size:13px;}
.side-note{
  font-size:13px;
  line-height:1.75;
  color:var(--text-low);
  margin-top:14px;
}

/* ============ 文章尾部 ============ */
.article-foot{
  max-width:760px;
  margin-top:44px;
  padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
}
.article-foot .foot-text{
  font-size:13px;
  color:var(--text-low);
  margin-right:auto;
}

/* ============ 继续阅读 ============ */
.related-section{padding:0 0 88px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:28px;
}
.section-head h2{font-size:clamp(22px,2.6vw,30px);}
.section-head p{font-size:14px;color:var(--text-low);margin-top:8px;}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--ink-700);
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,216,255,.45);
  box-shadow:0 18px 44px rgba(0,0,0,.45),0 0 0 1px rgba(47,216,255,.18);
}
.card-media{
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:rgba(255,255,255,.03);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s ease;
}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{
  padding:20px 22px 22px;
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
}
.card-body h3{
  font-size:18px;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-body h3 a{color:var(--text-hi);}
.card-body h3 a:hover{color:var(--primary);text-decoration:none;}
.card-desc{
  font-size:14px;
  line-height:1.75;
  color:var(--text-mid);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--text-low);
}
.card-foot .arrow{color:var(--primary);}

/* ============ CTA 条带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg, rgba(6,10,20,.92), rgba(6,10,20,.68));
}
.cta-inner{
  position:relative;
  z-index:2;
  padding:72px 0;
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:40px;
  align-items:center;
}
.cta-inner h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.cta-inner p{font-size:15px;color:var(--text-mid);max-width:560px;}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:flex-end;
}
.cta-panel{
  border-radius:var(--radius-lg);
  border:1px solid var(--line-strong);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  padding:24px 26px;
}
.cta-panel ul li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14px;
  color:var(--text-mid);
  margin-bottom:10px;
}
.cta-panel ul li:last-child{margin-bottom:0;}
.cta-panel .tick{
  flex-shrink:0;
  width:18px;height:18px;
  margin-top:3px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:#04141F;
  background:var(--primary);
  font-size:11px;
  font-weight:700;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:64px 0 30px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:36px;
}
.footer-col + .footer-col{
  border-left:1px solid var(--line);
  padding-left:32px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:12px;font-size:16px;}
.footer-brand .brand-name{font-size:15px;}
.footer-col h4{
  font-size:15px;
  color:var(--text-hi);
  margin-bottom:16px;
  letter-spacing:.04em;
}
.footer-col p{
  font-size:13px;
  line-height:1.85;
  color:var(--text-low);
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  font-size:14px;
  color:var(--text-mid);
}
.footer-col ul a:hover{color:var(--primary);text-decoration:none;}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-low);
}

/* ============ 响应式 ============ */
@media (max-width:1060px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;}
  .article-side{position:static;order:2;}
  .cta-inner{grid-template-columns:minmax(0,1fr);gap:28px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;}
  .footer-col + .footer-col{border-left:0;padding-left:0;}
}
@media (max-width:1023px){
  .nav-links,
  .header-actions{display:none;}
  .header-inner{display:none;}
  .mobile-top{display:flex;}
  .tabbar{display:grid;}
  body{padding-bottom:76px;}
  .article-head-inner{padding:24px 22px 26px;}
  .article-section{padding:4px 0 64px;}
  .related-section{padding:0 0 64px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{padding:56px 0;}
  .site-footer{padding:52px 0 26px;}
}
@media (max-width:767px){
  .container{padding-left:18px;padding-right:18px;}
  .article-head{padding:16px 0 26px;}
  .article-head h1{font-size:26px;line-height:1.35;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:20px;margin:1.7em 0 .7em;}
  .article-body h3{font-size:17px;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;}
  .cta-panel{padding:20px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .breadcrumb .current{white-space:normal;max-width:100%;}
}
@media (max-width:520px){
  .article-head h1{font-size:23px;}
  .brand-name{font-size:15px;white-space:normal;}
  .article-meta{gap:8px;font-size:12px;}
  .btn{padding:11px 18px;font-size:14px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --ink-900:#060A14;
  --ink-800:#0B1224;
  --ink-700:#121B33;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --primary:#2FD8FF;
  --primary-deep:#12A9E6;
  --accent:#7C5CFF;
  --warm:#FFB457;
  --text-hi:#EAF2FF;
  --text-mid:#9FB0CC;
  --text-low:#67789A;
  --radius-card:16px;
  --radius-block:22px;
  --radius-btn:12px;
  --shadow-card:0 24px 60px rgba(0,0,0,.45);
  --shadow-hover:0 18px 44px rgba(0,0,0,.5),0 0 0 1px rgba(47,216,255,.35),0 0 34px rgba(47,216,255,.18);
  --section-pad:96px;
  --gutter:32px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","SF Pro Display","Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--ink-800);
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px),
    radial-gradient(900px 520px at 82% -8%,rgba(124,92,255,.16),transparent 62%),
    radial-gradient(760px 460px at 8% 8%,rgba(47,216,255,.12),transparent 60%);
  background-size:64px 64px,64px 64px,auto,auto;
  color:var(--text-hi);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#7FE7FF;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:.01em;color:var(--text-hi);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--section-pad) 0;position:relative;}
.section--dark{background:linear-gradient(180deg,rgba(6,10,20,.92),rgba(6,10,20,.72));}
.section--panel{background:rgba(255,255,255,.018);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-num);font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary);margin-bottom:16px;
}
.section-eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px;display:inline-block;}
.section-head h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:14px;}
.section-head p{color:var(--text-mid);font-size:16px;}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,18,36,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#04121C;font-weight:700;font-size:19px;font-family:var(--font-cn);
  box-shadow:0 0 26px rgba(47,216,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:700;color:var(--text-hi);letter-spacing:.01em;}
.brand-sub{font-size:12px;color:var(--text-low);letter-spacing:.16em;font-family:var(--font-num);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;padding:10px 14px;border-radius:10px;
  color:var(--text-mid);font-size:15px;font-weight:500;text-decoration:none;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--text-hi);background:rgba(255,255,255,.06);text-decoration:none;}
.nav-links a.is-active{color:var(--text-hi);background:rgba(47,216,255,.12);}
.nav-links a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
}
.header-actions{display:flex;align-items:center;gap:12px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn-primary{
  background:linear-gradient(100deg,var(--primary),var(--accent));
  color:#04121C;
  box-shadow:0 10px 28px rgba(47,216,255,.25);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(47,216,255,.35);color:#04121C;filter:brightness(1.08);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,216,255,.22);}
.btn-ghost{
  background:transparent;color:var(--primary);border-color:rgba(47,216,255,.45);
}
.btn-ghost:hover{background:rgba(47,216,255,.08);color:#7FE7FF;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.header-toggle{display:none;background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--text-hi);width:42px;height:42px;border-radius:12px;font-size:17px;cursor:pointer;}

/* ============ Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 64px;
  background-image:linear-gradient(180deg,rgba(6,10,20,.78),rgba(6,10,20,.94)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,216,255,.5),transparent);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:26px;font-family:var(--font-num);}
.breadcrumb a{color:var(--text-mid);text-decoration:none;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-low);}
.breadcrumb .current{color:var(--text-hi);}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.page-hero h1{
  font-size:clamp(28px,4vw,48px);line-height:1.24;margin-bottom:18px;
  background:linear-gradient(96deg,#FFFFFF 12%,#BFE9FF 58%,#9C8BFF 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-lead{color:var(--text-mid);font-size:17px;line-height:1.9;max-width:620px;margin-bottom:22px;}
.hero-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:13px;color:var(--text-low);font-family:var(--font-num);letter-spacing:.02em;
}
.hero-meta span{display:inline-flex;align-items:center;gap:7px;}
.hero-meta i{color:var(--primary);font-size:12px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(47,216,255,.12);color:var(--primary);border:1px solid rgba(47,216,255,.22);
  font-family:var(--font-num);letter-spacing:.02em;
}
.badge-warm{background:rgba(255,180,87,.14);color:var(--warm);border-color:rgba(255,180,87,.28);}
.hero-card{
  position:relative;border-radius:var(--radius-block);overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.hero-card .hero-card-img{
  aspect-ratio:16/10;width:100%;object-fit:cover;opacity:.85;
}
.hero-card-body{padding:22px 24px 24px;}
.hero-card-body h2{
  font-size:17px;font-weight:600;color:var(--text-hi);margin-bottom:14px;
}
.hero-stat-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.hero-stat{background:rgba(6,10,20,.55);border:1px solid var(--line);border-radius:12px;padding:12px 10px;text-align:center;}
.hero-stat b{display:block;font-family:var(--font-num);font-size:20px;font-weight:600;color:var(--warm);letter-spacing:.02em;}
.hero-stat span{font-size:12px;color:var(--text-low);}

/* ============ Guide layout ============ */
.guide-layout{display:grid;grid-template-columns:3fr 9fr;gap:48px;align-items:start;}
.toc{
  position:sticky;top:104px;
  background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px 20px;box-shadow:var(--shadow-card);
}
.toc h2{font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-low);font-family:var(--font-num);margin-bottom:16px;}
.toc ol{display:flex;flex-direction:column;gap:2px;counter-reset:toc;}
.toc li{counter-increment:toc;}
.toc a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14px;color:var(--text-mid);text-decoration:none;
  transition:background .2s ease,color .2s ease;
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-num);font-size:12px;color:var(--text-low);
}
.toc a:hover{background:rgba(47,216,255,.1);color:var(--text-hi);text-decoration:none;}
.toc a:hover::before{color:var(--primary);}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-low);line-height:1.7;
}
.guide-body{display:flex;flex-direction:column;gap:56px;}
.guide-block{
  background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--radius-block);padding:32px;box-shadow:var(--shadow-card);
  scroll-margin-top:104px;
}
.guide-block--plain{background:transparent;border:none;box-shadow:none;padding:0;}
.guide-block-head{margin-bottom:26px;}
.guide-block-head h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:10px;display:flex;align-items:center;gap:12px;}
.guide-block-head h2::before{
  content:"";width:4px;height:22px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--accent));
}
.guide-block-head p{color:var(--text-mid);font-size:15px;}
.tip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.tip-card{
  background:rgba(255,255,255,.035);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tip-card:hover{transform:translateY(-2px);border-color:rgba(47,216,255,.4);box-shadow:var(--shadow-hover);}
.tip-card .tip-index{
  font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.16em;
  color:var(--primary);margin-bottom:10px;display:block;
}
.tip-card h3{font-size:18px;margin-bottom:10px;}
.tip-card p{font-size:14px;color:var(--text-mid);line-height:1.8;}
.tip-card .tip-tag{
  display:inline-flex;margin-top:14px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:600;background:rgba(124,92,255,.16);color:#B9A8FF;border:1px solid rgba(124,92,255,.3);
  font-family:var(--font-num);
}

/* compare rows */
.compare-list{display:flex;flex-direction:column;gap:14px;}
.compare-row{
  display:grid;grid-template-columns:140px 1fr 1fr;gap:16px;align-items:stretch;
  background:rgba(255,255,255,.03);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:16px 18px;
  transition:border-color .22s ease,background .22s ease;
}
.compare-row:hover{border-color:rgba(47,216,255,.35);background:rgba(47,216,255,.04);}
.compare-label{display:flex;align-items:center;font-size:14px;font-weight:600;color:var(--text-mid);}
.compare-item{
  display:flex;align-items:flex-start;gap:10px;
  padding:12px 14px;border-radius:12px;font-size:14px;line-height:1.7;
}
.compare-item i{margin-top:4px;font-size:13px;}
.compare-ok{background:rgba(47,216,255,.09);border:1px solid rgba(47,216,255,.24);color:#D6F3FF;}
.compare-ok i{color:var(--primary);}
.compare-no{background:rgba(255,180,87,.08);border:1px solid rgba(255,180,87,.24);color:#FCE4C4;}
.compare-no i{color:var(--warm);}

/* checklist */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px 22px;}
.check-item{
  display:flex;align-items:flex-start;gap:12px;
  padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.03);
  border:1px solid var(--line);font-size:14px;color:var(--text-mid);line-height:1.7;
  transition:background .2s ease,border-color .2s ease;
}
.check-item:hover{background:rgba(47,216,255,.06);border-color:rgba(47,216,255,.28);}
.check-item i{color:var(--primary);font-size:15px;margin-top:3px;flex:0 0 auto;}
.check-item strong{color:var(--text-hi);font-weight:600;}

/* flow / steps in category1 as light variation */
.flow-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.flow-item{
  position:relative;padding:24px 22px;border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(47,216,255,.08),rgba(124,92,255,.07));
  border:1px solid var(--line);
}
.flow-item .flow-num{
  font-family:var(--font-num);font-size:34px;font-weight:600;line-height:1;
  color:rgba(255,255,255,.14);display:block;margin-bottom:12px;
}
.flow-item h3{font-size:17px;margin-bottom:8px;}
.flow-item p{font-size:14px;color:var(--text-mid);line-height:1.8;}

/* media figure */
.guide-figure{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);
  background:var(--ink-700);box-shadow:var(--shadow-card);
}
.guide-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.guide-figure figcaption{padding:14px 20px;font-size:13px;color:var(--text-low);border-top:1px solid var(--line);}

/* ============ FAQ ============ */
.accordion{background:transparent;border:none;margin:0;}
.accordion .accordion-item{
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.accordion .accordion-item:hover{border-color:rgba(47,216,255,.32);}
.accordion .accordion-item.is-active{border-color:rgba(47,216,255,.42);box-shadow:0 18px 44px rgba(0,0,0,.42),0 0 30px rgba(47,216,255,.12);}
.accordion .accordion-title{
  background:transparent;border:none;padding:20px 56px 20px 24px;
  font-size:17px;font-weight:600;color:var(--text-hi);position:relative;
  transition:background .2s ease;
}
.accordion .accordion-title:hover{background:rgba(255,255,255,.045);}
.accordion .accordion-title:focus{outline:2px solid var(--primary);outline-offset:-2px;}
.accordion .accordion-title::before{
  content:"\f067";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--primary);transition:transform .25s ease;
}
.accordion .accordion-title.is-active::before,
.accordion .accordion-item.is-active .accordion-title::before{
  content:"\f068";transform:translateY(-50%) rotate(180deg);
}
.accordion .accordion-content{
  background:transparent;border:none;color:var(--text-mid);
  padding:0 24px 22px;font-size:15px;line-height:1.85;
}
.accordion .accordion-content p{margin-bottom:10px;}
.accordion .accordion-content p:last-child{margin-bottom:0;}

/* ============ Cross link ============ */
.cross-band{
  position:relative;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(6,10,20,.82),rgba(6,10,20,.9)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cross-grid{display:grid;grid-template-columns:6fr 6fr;gap:40px;align-items:center;}
.cross-copy h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px;}
.cross-copy p{color:var(--text-mid);font-size:15px;line-height:1.9;margin-bottom:24px;max-width:540px;}
.cross-actions{display:flex;flex-wrap:wrap;gap:14px;}
.cross-card{
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--radius-block);
  padding:26px;box-shadow:var(--shadow-card);
}
.cross-card h3{font-size:18px;margin-bottom:12px;}
.cross-card p{font-size:14px;color:var(--text-mid);line-height:1.8;margin-bottom:18px;}
.cross-card ul{display:flex;flex-direction:column;gap:10px;margin-bottom:20px;}
.cross-card li{display:flex;gap:10px;font-size:14px;color:var(--text-mid);}
.cross-card li i{color:var(--primary);margin-top:4px;font-size:13px;}

/* ============ Footer ============ */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-col h4{font-size:14px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-low);font-family:var(--font-num);margin-bottom:18px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-text{display:flex;flex-direction:column;}
.footer-col p{font-size:14px;color:var(--text-low);line-height:1.85;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--text-mid);text-decoration:none;transition:color .2s ease,padding-left .2s ease;}
.footer-col ul a:hover{color:var(--primary);padding-left:4px;}
.footer-col + .footer-col{border-left:1px solid var(--line);padding-left:40px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-low);font-family:var(--font-num);letter-spacing:.02em;
}

/* ============ Mobile tabbar ============ */
.mobile-tabbar{display:none;}

/* ============ Responsive ============ */
@media screen and (max-width:1023px){
  :root{--section-pad:72px;--gutter:28px;}
  .container{padding:0 28px;}
  .nav-links{display:none;}
  .header-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .header-actions .btn-ghost{display:none;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .guide-layout{grid-template-columns:1fr;gap:32px;}
  .toc{position:static;}
  .cross-grid{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-col + .footer-col{border-left:none;padding-left:0;}
  .compare-row{grid-template-columns:1fr 1fr;gap:12px;}
  .compare-label{grid-column:1 / -1;font-size:13px;letter-spacing:.08em;text-transform:uppercase;font-family:var(--font-num);color:var(--text-low);}
  .flow-strip{grid-template-columns:1fr;}
  .mobile-tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:80;
    background:rgba(9,14,28,.94);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
    padding:8px 6px calc(8px + env(safe-area-inset-bottom));
  }
  .mobile-tabbar a{
    flex:1;display:flex;flex-direction:column;align-items:center;gap:5px;
    padding:6px 4px;border-radius:12px;color:var(--text-low);
    font-size:11px;text-decoration:none;transition:color .2s ease,background .2s ease;
  }
  .mobile-tabbar a i{font-size:17px;}
  .mobile-tabbar a:hover{text-decoration:none;}
  .mobile-tabbar a.is-active{color:var(--primary);background:rgba(47,216,255,.1);}
  .mobile-tabbar a.is-active i{filter:drop-shadow(0 0 8px rgba(47,216,255,.75));}
  body{padding-bottom:86px;}
}
@media screen and (max-width:767px){
  :root{--section-pad:56px;}
  .container{padding:0 20px;}
  .brand-name{font-size:15px;}
  .brand-sub{font-size:11px;letter-spacing:.1em;}
  .page-hero{padding:52px 0 48px;}
  .hero-lead{font-size:15px;}
  .tip-grid{grid-template-columns:1fr;}
  .check-list{grid-template-columns:1fr;}
  .guide-block{padding:24px 20px;}
  .hero-stat-list{grid-template-columns:repeat(3,1fr);gap:8px;}
  .hero-stat b{font-size:17px;}
  .compare-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cross-actions .btn{width:100%;}
  .section-head{margin-bottom:34px;}
}

/* roulang page: category2 */
:root{
  --ink-900:#060A14;
  --ink-800:#0B1224;
  --ink-700:#121B33;
  --ink-600:#18243F;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --primary:#2FD8FF;
  --primary-deep:#12A9E6;
  --accent:#7C5CFF;
  --warm:#FFB457;
  --text-hi:#EAF2FF;
  --text-mid:#9FB0CC;
  --text-low:#67789A;
  --glass:rgba(255,255,255,.055);
  --radius-s:12px;
  --radius-m:16px;
  --radius-l:22px;
  --shadow-card:0 24px 60px rgba(0,0,0,.45);
  --shadow-glow:0 8px 30px rgba(47,216,255,.35);
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:48px;
  --space-6:64px;
  --space-7:96px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Inter","Segoe UI",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0 0 calc(64px + env(safe-area-inset-bottom));
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--text-hi);
  background-color:var(--ink-800);
  background-image:
    radial-gradient(circle at 12% -5%,rgba(47,216,255,.14),transparent 42%),
    radial-gradient(circle at 88% 4%,rgba(124,92,255,.13),transparent 46%),
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:auto,auto,56px 56px,56px 56px;
  background-attachment:fixed,fixed,scroll,scroll;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:#7FE7FF;text-decoration:underline;text-underline-offset:3px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:.01em;color:var(--text-hi);}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
button,input,textarea,select{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
::selection{background:rgba(47,216,255,.3);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.num{font-family:var(--font-num);font-weight:600;letter-spacing:.02em;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,18,36,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(9,15,30,.94);
  border-bottom-color:var(--line);
  box-shadow:0 12px 34px rgba(0,0,0,.4);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:var(--space-3);
  min-height:74px;
  padding:10px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text-hi);
}
.brand:hover{text-decoration:none;color:var(--text-hi);}
.brand-mark{
  width:40px;height:40px;
  flex:0 0 40px;
  display:grid;place-items:center;
  border-radius:12px;
  font-family:var(--font-num);
  font-weight:700;
  font-size:19px;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);
  box-shadow:0 6px 22px rgba(47,216,255,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:16px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.brand-sub{font-size:11.5px;color:var(--text-low);letter-spacing:.16em;}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
  flex-wrap:wrap;
}
.nav-links a{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  border-radius:10px;
  font-size:15px;
  color:var(--text-mid);
  border:1px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.nav-links a:hover{
  color:var(--text-hi);
  background:rgba(255,255,255,.06);
  text-decoration:none;
}
.nav-links a.is-active{
  color:var(--primary);
  background:rgba(47,216,255,.10);
  border-color:rgba(47,216,255,.34);
}
.nav-cta{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.mobile-bar{
  display:none;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 0;
}
.mobile-bar .brand-name{font-size:15px;}
.mobile-menu-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border-radius:10px;
  font-size:14px;
  color:var(--text-hi);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  cursor:pointer;
}
.mobile-menu-btn:hover{background:rgba(47,216,255,.12);border-color:rgba(47,216,255,.34);}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(9,15,30,.98);
  padding:10px 0 16px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a{
  display:block;
  padding:13px 4px;
  font-size:15px;
  color:var(--text-mid);
  border-bottom:1px solid var(--line);
}
.mobile-drawer a:last-child{border-bottom:none;}
.mobile-drawer a.is-active{color:var(--primary);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  border-radius:var(--radius-s);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{
  color:#04121C;
  background:linear-gradient(100deg,var(--primary) 0%,var(--accent) 100%);
  box-shadow:0 10px 26px rgba(47,216,255,.26);
}
.btn-primary:hover{
  color:#04121C;
  text-decoration:none;
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:var(--shadow-glow);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,216,255,.22);}
.btn-ghost{
  color:var(--primary);
  background:transparent;
  border-color:rgba(47,216,255,.45);
}
.btn-ghost:hover{
  color:#7FE7FF;
  text-decoration:none;
  background:rgba(47,216,255,.08);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:999px;
  font-size:12.5px;
  letter-spacing:.02em;
  color:var(--primary);
  background:rgba(47,216,255,.12);
  border:1px solid rgba(47,216,255,.26);
}
.badge-warm{
  color:var(--warm);
  background:rgba(255,180,87,.12);
  border-color:rgba(255,180,87,.32);
}
.badge-accent{
  color:#B9A8FF;
  background:rgba(124,92,255,.14);
  border-color:rgba(124,92,255,.34);
}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:76px 0 68px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(6,10,20,.82) 0%,rgba(11,18,36,.92) 100%),
    url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(circle at 78% 18%,rgba(47,216,255,.16),transparent 52%);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.35fr .9fr;
  gap:var(--space-5);
  align-items:center;
}
.hero-copy{max-width:660px;}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-mid);
  margin-bottom:18px;
}
.hero-eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 4px rgba(47,216,255,.16);
}
.page-hero h1{
  font-size:44px;
  line-height:1.24;
  margin-bottom:18px;
}
.page-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--primary) 10%,var(--accent) 92%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:17px;
  color:var(--text-mid);
  line-height:1.85;
  margin-bottom:24px;
  max-width:600px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-panel{
  position:relative;
  border-radius:var(--radius-l);
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.hero-panel-img{
  aspect-ratio:16/10;
  width:100%;
  object-fit:cover;
  opacity:.9;
}
.hero-panel-body{
  padding:20px 22px 24px;
  border-top:1px solid var(--line);
}
.hero-panel-body h2{
  font-size:17px;
  margin-bottom:12px;
}
.mini-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
}
.mini-stat{
  padding:12px 14px;
  border-radius:var(--radius-s);
  background:var(--ink-700);
  border:1px solid var(--line);
}
.mini-stat .v{
  display:block;
  font-family:var(--font-num);
  font-size:22px;
  font-weight:700;
  color:var(--warm);
  line-height:1.25;
}
.mini-stat .k{
  display:block;
  font-size:12.5px;
  color:var(--text-low);
}
.crumb-bar{
  padding:18px 0 0;
}
.crumb-bar ol{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-size:13.5px;
  color:var(--text-low);
}
.crumb-bar li::after{content:"/";margin-left:8px;color:rgba(255,255,255,.2);}
.crumb-bar li:last-child::after{content:"";}
.crumb-bar li a{color:var(--text-mid);}
.crumb-bar li[aria-current] {color:var(--text-hi);}

/* ---------- sections ---------- */
.section{padding:var(--space-7) 0;}
.section-tight{padding:var(--space-6) 0;}
.section-alt{
  background:linear-gradient(180deg,rgba(6,10,20,.6) 0%,rgba(18,27,51,.5) 100%);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:760px;margin-bottom:var(--space-5);}
.section-head h2{font-size:32px;margin-bottom:14px;}
.section-head p{color:var(--text-mid);font-size:16px;}
.section-head .kicker{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12.5px;
  letter-spacing:.22em;
  color:var(--primary);
  margin-bottom:12px;
}

/* ---------- 3/9 layout ---------- */
.layout-side{
  display:grid;
  grid-template-columns:280px 1fr;
  gap:var(--space-5);
  align-items:start;
}
.toc{
  position:sticky;
  top:100px;
  padding:22px;
  border-radius:var(--radius-m);
  background:var(--ink-700);
  border:1px solid var(--line);
}
.toc h2{font-size:15px;color:var(--text-mid);letter-spacing:.08em;margin-bottom:14px;font-weight:600;}
.toc ol{counter-reset:toc;}
.toc li{counter-increment:toc;margin-bottom:4px;}
.toc a{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:9px 10px;
  border-radius:10px;
  font-size:14.5px;
  color:var(--text-mid);
  border-left:2px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-family:var(--font-num);
  font-size:12px;
  color:var(--text-low);
  padding-top:3px;
}
.toc a:hover{
  color:var(--text-hi);
  background:rgba(255,255,255,.05);
  text-decoration:none;
  border-left-color:var(--primary);
}
.toc-note{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-low);
  line-height:1.7;
}

.content-block{margin-bottom:56px;}
.content-block:last-child{margin-bottom:0;}
.block-head{margin-bottom:24px;}
.block-head h2{
  font-size:26px;
  padding-left:14px;
  position:relative;
  margin-bottom:10px;
}
.block-head h2::before{
  content:"";
  position:absolute;left:0;top:6px;bottom:6px;
  width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--accent));
}
.block-head p{color:var(--text-mid);font-size:15px;}

/* ---------- group cards (分组对照) ---------- */
.group-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.group-card{
  padding:24px;
  border-radius:var(--radius-m);
  background:var(--ink-700);
  border:1px solid var(--line);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.group-card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,216,255,.34);
  box-shadow:0 18px 44px rgba(0,0,0,.42);
}
.group-card-top{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.group-icon{
  width:42px;height:42px;
  flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:12px;
  font-size:17px;
  color:var(--primary);
  background:rgba(47,216,255,.12);
  border:1px solid rgba(47,216,255,.24);
}
.group-card h3{font-size:19px;}
.group-card .g-sub{font-size:13px;color:var(--text-low);}
.group-list{margin-top:6px;}
.group-list li{
  display:flex;
  gap:10px;
  padding:9px 0;
  border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:14.5px;
  color:var(--text-mid);
}
.group-list li:last-child{border-bottom:none;}
.group-list li i{
  color:var(--primary);
  font-size:12px;
  padding-top:6px;
}
.group-list li strong{color:var(--text-hi);font-weight:600;}

/* ---------- compare rows (两栏对照) ---------- */
.compare-list{display:grid;gap:14px;}
.compare-row{
  display:grid;
  grid-template-columns:1fr 46px 1fr;
  align-items:stretch;
  gap:0;
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:var(--ink-700);
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.compare-row:hover{
  border-color:rgba(47,216,255,.3);
  box-shadow:0 16px 40px rgba(0,0,0,.4);
  transform:translateY(-2px);
}
.compare-col{padding:20px 22px;}
.compare-col h3{font-size:16px;margin-bottom:6px;}
.compare-col p{font-size:14.5px;color:var(--text-mid);margin:0;}
.compare-col.is-risk{
  background:rgba(255,180,87,.05);
  border-right:1px solid var(--line);
}
.compare-col.is-risk h3{color:var(--warm);}
.compare-col.is-safe{background:rgba(47,216,255,.045);}
.compare-col.is-safe h3{color:var(--primary);}
.compare-divider{
  display:grid;
  place-items:center;
  font-size:13px;
  color:var(--text-low);
  background:rgba(255,255,255,.03);
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
}

/* ---------- timeline ---------- */
.timeline{
  position:relative;
  padding-left:34px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;top:6px;bottom:6px;
  width:2px;
  background:linear-gradient(180deg,var(--primary),rgba(124,92,255,.6) 70%,transparent);
}
.tl-item{
  position:relative;
  padding:0 0 26px 22px;
  border-radius:var(--radius-m);
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:-33px;top:8px;
  width:14px;height:14px;
  border-radius:50%;
  background:var(--ink-800);
  border:2px solid var(--primary);
  box-shadow:0 0 0 5px rgba(47,216,255,.12);
}
.tl-card{
  padding:18px 22px;
  border-radius:var(--radius-m);
  background:var(--ink-700);
  border:1px solid var(--line);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.tl-card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,216,255,.3);
  box-shadow:0 16px 38px rgba(0,0,0,.4);
}
.tl-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:6px;
}
.tl-num{
  font-family:var(--font-num);
  font-size:26px;
  font-weight:700;
  color:rgba(47,216,255,.34);
  line-height:1;
}
.tl-head h3{font-size:18px;}
.tl-card p{font-size:14.5px;color:var(--text-mid);margin:0;}
.tl-tag{
  margin-left:auto;
  font-size:12px;
  color:var(--text-low);
}

/* ---------- checklist ---------- */
.check-list{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
}
.check-item{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:16px 18px;
  border-radius:var(--radius-s);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  transition:background .2s ease,border-color .2s ease;
}
.check-item:hover{background:rgba(47,216,255,.07);border-color:rgba(47,216,255,.28);}
.check-item i{
  margin-top:4px;
  width:20px;height:20px;
  flex:0 0 20px;
  display:grid;place-items:center;
  border-radius:6px;
  font-size:11px;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--accent));
}
.check-item span{font-size:14.5px;color:var(--text-mid);}
.check-item span strong{color:var(--text-hi);font-weight:600;}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px;}
.accordion{
  background:transparent;
  border:none;
  margin:0;
}
.accordion .accordion-item{
  margin-bottom:12px;
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  overflow:hidden;
}
.accordion .accordion-title{
  display:flex;
  align-items:center;
  gap:14px;
  padding:20px 24px;
  font-size:17px;
  font-weight:600;
  color:var(--text-hi);
  background:transparent;
  border:none;
  line-height:1.5;
}
.accordion .accordion-title:hover{
  background:rgba(47,216,255,.07);
  color:var(--text-hi);
  text-decoration:none;
}
.accordion .accordion-title::before{
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  font-size:13px;
  color:var(--primary);
  margin-right:0;
  position:static;
  transform:none;
  transition:transform .25s ease,opacity .25s ease;
}
.accordion .accordion-item.is-active .accordion-title::before{
  content:"\f068";
  transform:rotate(180deg);
}
.accordion .accordion-content{
  padding:0 24px 22px 58px;
  color:var(--text-mid);
  font-size:15px;
  line-height:1.85;
  background:transparent;
  border:none!important;
}
.accordion .accordion-content p{margin:0;}

/* ---------- cross link ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.cross-card{
  display:flex;
  gap:18px;
  align-items:center;
  padding:22px;
  border-radius:var(--radius-m);
  background:var(--ink-700);
  border:1px solid var(--line);
  color:var(--text-hi);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.cross-card:hover{
  text-decoration:none;
  color:var(--text-hi);
  transform:translateY(-2px);
  border-color:rgba(47,216,255,.34);
  box-shadow:0 18px 44px rgba(0,0,0,.42);
}
.cross-thumb{
  width:104px;height:70px;
  flex:0 0 104px;
  border-radius:12px;
  object-fit:cover;
  border:1px solid var(--line);
}
.cross-card h3{font-size:17px;margin-bottom:6px;}
.cross-card p{font-size:13.5px;color:var(--text-mid);margin:0;}
.cross-card .arrow{
  margin-left:auto;
  color:var(--primary);
  font-size:15px;
}

/* ---------- CTA / form ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:var(--space-7) 0;
  background:
    linear-gradient(100deg,rgba(6,10,20,.86) 0%,rgba(18,27,51,.9) 100%),
    url(/assets/images/backpic/back-3.webp) center/cover no-repeat;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-grid{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1fr 420px;
  gap:var(--space-5);
  align-items:center;
}
.cta-copy h2{font-size:32px;margin-bottom:14px;}
.cta-copy p{color:var(--text-mid);max-width:520px;}
.cta-points{margin-top:22px;display:grid;gap:10px;}
.cta-points li{
  display:flex;gap:10px;align-items:center;
  font-size:14.5px;color:var(--text-mid);
}
.cta-points li i{color:var(--primary);font-size:12px;}
.form-card{
  padding:28px;
  border-radius:var(--radius-l);
  background:rgba(255,255,255,.055);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);
}
.form-card h3{font-size:19px;margin-bottom:6px;}
.form-card .form-sub{font-size:13.5px;color:var(--text-low);margin-bottom:20px;}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:13.5px;
  color:var(--text-mid);
  margin-bottom:8px;
}
.field input,
.field textarea{
  width:100%;
  padding:12px 14px;
  border-radius:var(--radius-s);
  background:rgba(6,10,20,.6);
  border:1px solid var(--line-strong);
  color:var(--text-hi);
  font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input::placeholder,
.field textarea::placeholder{color:var(--text-low);}
.field input:focus,
.field textarea:focus{
  outline:none;
  background:rgba(6,10,20,.85);
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,216,255,.16);
}
.field.has-error input{border-color:var(--warm);box-shadow:0 0 0 3px rgba(255,180,87,.14);}
.field-hint{font-size:12.5px;color:var(--warm);margin-top:6px;display:none;}
.field.has-error .field-hint{display:block;}
.form-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--text-low);
  line-height:1.7;
}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:var(--space-6) 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:var(--space-4);
  padding-bottom:var(--space-5);
}
.footer-col h4{
  font-size:14px;
  color:var(--text-hi);
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-mid);}
.footer-col a:hover{color:var(--primary);}
.footer-col p{font-size:13.5px;color:var(--text-low);line-height:1.8;margin-top:14px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:6px;}
.footer-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:17px;}
.footer-brand .brand-name{font-size:15px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-low);
}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:80;
  padding:8px 12px calc(8px + env(safe-area-inset-bottom));
  background:rgba(9,15,30,.96);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
}
.mobile-tabbar ul{
  display:flex;
  align-items:center;
  justify-content:space-around;
  gap:4px;
}
.mobile-tabbar a{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  padding:6px 10px;
  border-radius:10px;
  font-size:11.5px;
  color:var(--text-low);
  min-width:64px;
}
.mobile-tabbar a i{font-size:17px;}
.mobile-tabbar a:hover{text-decoration:none;color:var(--text-mid);}
.mobile-tabbar a.is-active{
  color:var(--primary);
  text-shadow:0 0 14px rgba(47,216,255,.6);
}
.mobile-tabbar a.is-active i{color:var(--primary);}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .mobile-bar{display:flex;}
  .nav-inner{display:none;}
  .mobile-tabbar{display:block;}
  body{padding-bottom:calc(72px + env(safe-area-inset-bottom));}
  .page-hero{padding:52px 0 48px;}
  .page-hero h1{font-size:34px;}
  .hero-grid{grid-template-columns:1fr;gap:var(--space-4);}
  .hero-panel{max-width:560px;}
  .section{padding:72px 0;}
  .section-tight{padding:52px 0;}
  .section-head h2,.cta-copy h2{font-size:26px;}
  .layout-side{grid-template-columns:1fr;gap:var(--space-4);}
  .toc{position:static;}
  .cta-grid{grid-template-columns:1fr;}
  .form-card{max-width:560px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media screen and (max-width:767px){
  .container{padding:0 18px;}
  .group-grid,.check-list,.cross-grid{grid-template-columns:1fr;}
  .compare-row{grid-template-columns:1fr;}
  .compare-divider{
    padding:6px 0;
    border-left:none;border-right:none;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    font-size:12px;
  }
  .compare-col.is-risk{border-right:none;}
}
@media screen and (max-width:639px){
  body{font-size:15.5px;}
  .page-hero h1{font-size:28px;line-height:1.3;}
  .hero-lead{font-size:15.5px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .section-head h2,.cta-copy h2,.page-hero h1{font-size:22px;}
  .block-head h2{font-size:20px;}
  .group-card h3,.tl-head h3{font-size:17px;}
  .hero-actions .btn{width:100%;}
  .mini-stats{grid-template-columns:1fr;}
  .accordion .accordion-title{padding:16px 18px;font-size:16px;}
  .accordion .accordion-content{padding:0 18px 18px 50px;}
  .form-card{padding:22px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .cross-card{flex-direction:column;align-items:flex-start;}
  .cross-thumb{width:100%;height:auto;aspect-ratio:16/9;flex:none;}
  .cross-card .arrow{margin-left:0;}
}