/* roulang page: index */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1424;
  --primary:#2CE5D2;
  --primary-deep:#12A99C;
  --primary-soft:rgba(44,229,210,.14);
  --accent:#FFB15C;
  --t1:#E8F1F8;
  --t2:#9FB3C8;
  --t3:#66798F;
  --link:#4FD8E8;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --ok:#3FD68C;
  --err:#FF6B6B;
  --glass:rgba(18,28,46,.72);
  --r-s:8px;
  --r-m:14px;
  --r-c:18px;
  --r-l:24px;
  --r-p:999px;
  --s1:0 2px 8px rgba(0,0,0,.28);
  --s2:0 12px 32px -12px rgba(0,0,0,.55);
  --s3:0 20px 48px -18px rgba(0,0,0,.7);
  --container:1200px;
  --sec-pad:96px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{color:var(--t1);line-height:1.25;margin:0;font-weight:700;}
p{margin:0;}
a{color:var(--link);text-decoration:none;text-underline-offset:4px;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;border:0;}
button,input,textarea,select{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-pad) 0;position:relative;}
.section--alt{background:var(--bg-1);}
.section--line{border-top:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.04em;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid rgba(44,229,210,.22);
  border-radius:var(--r-p);
  padding:6px 14px;
}
.sec-head{max-width:720px;margin-bottom:48px;}
.sec-head h2{font-size:32px;margin-bottom:14px;}
.sec-head p{color:var(--t2);}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none;}
.sec-head--row .sec-head-txt{max-width:680px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:0;cursor:pointer;
  text-decoration:none;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn:hover{text-decoration:none;}
.btn-primary{
  background:var(--primary);color:#04211F;
  box-shadow:0 8px 28px -10px rgba(44,229,210,.65);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 12px 40px -10px rgba(44,229,210,.75);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -12px rgba(44,229,210,.6);}
.btn-accent{
  background:var(--accent);color:#2A1602;
  box-shadow:0 10px 30px -12px rgba(255,177,92,.7);
}
.btn-accent:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 40px -12px rgba(255,177,92,.8);}
.btn-accent:active{transform:translateY(0);box-shadow:0 6px 18px -12px rgba(255,177,92,.6);}
.btn-ghost{
  background:transparent;color:var(--t1);border-color:var(--line-strong);
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;transform:none;cursor:not-allowed;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-weight:600;font-size:15px;height:auto;padding:0;
}
.btn-text:hover{color:var(--t1);text-decoration:none;}
.btn-text:hover .arrow{transform:translateX(4px);}
.arrow{transition:transform .2s ease;}
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;line-height:1;padding:6px 10px;border-radius:var(--r-p);
  background:var(--primary-soft);color:var(--primary);
  border:1px solid rgba(44,229,210,.2);
}
.badge--accent{background:rgba(255,177,92,.14);color:var(--accent);border-color:rgba(255,177,92,.24);}
.card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-c);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--s2);position:relative;overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.12),rgba(255,255,255,0));
}
.card:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.4);box-shadow:var(--s3),0 0 0 1px rgba(44,229,210,.08);}

/* ============ header ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(6,11,20,.6);
  border-bottom:1px solid transparent;
  transition:background .25s ease,height .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:72px;gap:16px;transition:height .25s ease;
}
.site-header.is-scrolled .nav-inner{height:64px;}
.nav-left,.nav-right{display:flex;align-items:center;gap:26px;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;color:var(--t2);font-size:15px;font-weight:500;
  padding:6px 2px;transition:color .2s ease;text-decoration:none;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;border-radius:2px;
}
.nav-link:hover{color:var(--t1);text-decoration:none;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--t1);}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--t1);font-size:19px;font-weight:700;letter-spacing:.01em;
  text-decoration:none;white-space:nowrap;
}
.brand:hover{text-decoration:none;color:var(--t1);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(44,229,210,.9),rgba(18,169,156,.85));
  box-shadow:0 6px 20px -8px rgba(44,229,210,.8);
  flex:0 0 auto;
}
.brand-mark svg{width:19px;height:19px;display:block;}
.brand-text{line-height:1;}
.brand-sub{display:block;font-size:11px;color:var(--t3);font-weight:500;margin-top:4px;letter-spacing:.06em;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t1);border-radius:2px;position:relative;transition:background .2s ease;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);border-radius:2px;
  transition:transform .22s ease,top .22s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg);}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg);}
.mobile-panel{
  display:none;
  position:fixed;top:72px;left:0;right:0;z-index:99;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  padding:12px 16px 20px;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .22s ease,transform .22s ease;
}
.mobile-panel.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-panel a.m-link{
  display:flex;align-items:center;height:48px;
  color:var(--t2);font-size:15px;border-bottom:1px solid var(--line);
  text-decoration:none;
}
.mobile-panel a.m-link:hover,.mobile-panel a.m-link.is-active{color:var(--primary);text-decoration:none;}
.mobile-panel .btn{width:100%;margin-top:16px;}

/* ============ hero ============ */
.hero{
  position:relative;padding:152px 0 80px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;top:-160px;right:-120px;width:620px;height:620px;
  background:radial-gradient(circle,rgba(44,229,210,.16),rgba(44,229,210,0) 66%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,180,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,180,220,.06) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 72% 30%,#000,transparent 68%);
  -webkit-mask-image:radial-gradient(circle at 72% 30%,#000,transparent 68%);
  pointer-events:none;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
}
.hero h1{font-size:48px;margin:22px 0 16px;letter-spacing:-.01em;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{font-size:17px;color:var(--t2);max-width:520px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.trust-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  font-size:14px;color:var(--t3);
}
.trust-bar span{display:inline-flex;align-items:center;gap:8px;}
.trust-bar i{width:6px;height:6px;border-radius:50%;background:var(--primary);display:inline-block;}
.trust-sep{color:var(--line-strong);}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-c);border:1px solid var(--line);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.9),0 0 0 1px rgba(44,229,210,.06);
}
.hero-float{
  position:absolute;left:-22px;bottom:26px;
  background:rgba(11,20,36,.94);border:1px solid var(--line-strong);
  border-radius:var(--r-m);padding:14px 18px;box-shadow:var(--s2);
  backdrop-filter:blur(12px);
}
.hero-float strong{display:block;color:var(--t1);font-size:20px;line-height:1.2;}
.hero-float span{font-size:12px;color:var(--t3);}

/* ============ metrics ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.metric{
  padding:24px;border-radius:var(--r-c);background:var(--bg-1);
  border:1px solid var(--line);transition:border-color .25s ease,transform .25s ease;
}
.metric:hover{border-color:rgba(44,229,210,.36);transform:translateY(-3px);}
.metric strong{display:block;font-size:34px;color:var(--accent);line-height:1.1;letter-spacing:-.02em;}
.metric .m-label{color:var(--t1);font-size:15px;font-weight:600;margin:10px 0 6px;}
.metric p{font-size:14px;color:var(--t3);line-height:1.7;}
.metric-bar{height:4px;border-radius:2px;background:rgba(120,180,220,.14);margin-top:14px;overflow:hidden;}
.metric-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-deep));border-radius:2px;}

/* ============ steps ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative;}
.step{
  padding:0 32px 0 0;position:relative;
}
.step + .step{padding-left:40px;}
.step + .step::before{
  content:"";position:absolute;left:0;top:6px;bottom:18px;width:1px;
  background:linear-gradient(180deg,rgba(120,180,220,.28),rgba(120,180,220,0));
}
.step-num{
  font-size:48px;font-weight:800;color:var(--accent);line-height:1;
  letter-spacing:-.03em;display:block;margin-bottom:18px;
}
.step h3{font-size:22px;margin-bottom:12px;}
.step p{color:var(--t2);font-size:15px;max-width:300px;}
.step-tag{display:inline-block;margin-top:16px;}

/* ============ proof ============ */
.proof{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:stretch;}
.proof-main{border-radius:var(--r-c);overflow:hidden;display:flex;flex-direction:column;}
.proof-main img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.proof-main-body{padding:28px 32px 32px;}
.proof-main-body h3{font-size:22px;margin-bottom:12px;}
.proof-main-body p{color:var(--t2);font-size:15px;}
.proof-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px;}
.proof-stats div{
  padding:16px;border-radius:var(--r-m);background:rgba(255,255,255,.03);
  border:1px solid var(--line);
}
.proof-stats strong{display:block;color:var(--primary);font-size:22px;line-height:1.2;}
.proof-stats span{font-size:13px;color:var(--t3);}
.proof-side{display:flex;flex-direction:column;gap:24px;}
.proof-side .card{flex:1;display:flex;flex-direction:column;}
.proof-side img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.proof-side .side-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.proof-side h4{font-size:17px;}
.proof-side p{font-size:14px;color:var(--t2);}
.byline{font-size:13px;color:var(--t3);margin-top:auto;padding-top:10px;}

/* ============ cms list ============ */
.cms-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cms-item{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-c);
  text-decoration:none;color:inherit;position:relative;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--s2);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.cms-item::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.12),rgba(255,255,255,0));
}
.cms-item:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.4);box-shadow:var(--s3);text-decoration:none;}
.cms-thumb{width:100%;aspect-ratio:16/9;overflow:hidden;background:rgba(120,180,220,.06);}
.cms-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.cms-item:hover .cms-thumb img{transform:scale(1.04);}
.cms-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.cms-title{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cms-excerpt{font-size:14px;color:var(--t2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.cms-meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-top:auto;padding-top:8px;}
.cms-meta svg{width:14px;height:14px;flex:0 0 auto;}
.cms-empty{
  grid-column:1/-1;text-align:center;padding:64px 24px;
  border:1px dashed var(--line-strong);border-radius:var(--r-c);
  background:rgba(255,255,255,.015);
}
.cms-empty svg{width:44px;height:44px;color:var(--t3);margin:0 auto 16px;}
.cms-empty p{color:var(--t3);margin-bottom:20px;}

/* ============ faq ============ */
.faq-wrap{max-width:840px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:22px 16px 22px 0;color:var(--t1);font-size:17px;font-weight:600;
  position:relative;transition:background .2s ease,color .2s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--primary);border-radius:2px;transform:scaleY(0);transform-origin:center;
  transition:transform .2s ease;
}
.faq-q:hover{color:var(--primary);}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.is-open .faq-q{color:var(--primary);background:rgba(44,229,210,.03);padding-left:16px;}
.faq-item.is-open .faq-q::before{transform:scaleY(1);}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 16px 24px 16px;font-size:15px;line-height:1.85;color:var(--t2);
}

/* ============ cta ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-l);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  padding:48px;
  display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;
  box-shadow:var(--s2);
}
.cta-band::before{
  content:"";position:absolute;top:-120px;left:-80px;width:460px;height:460px;
  background:radial-gradient(circle,rgba(44,229,210,.14),rgba(44,229,210,0) 68%);
  pointer-events:none;
}
.cta-band h2{font-size:30px;margin-bottom:14px;position:relative;}
.cta-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;position:relative;}
.cta-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--t2);}
.cta-list svg{width:18px;height:18px;color:var(--primary);flex:0 0 auto;margin-top:4px;}
.form-card{position:relative;display:flex;flex-direction:column;gap:16px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;color:var(--t3);}
.field input,.field textarea{
  height:48px;padding:0 16px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--t1);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:auto;padding:14px 16px;resize:vertical;min-height:96px;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:hover,.field textarea:hover{border-color:var(--line-strong);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(44,229,210,.16);
  background:rgba(255,255,255,.06);
}
.field.has-error input,.field.has-error textarea{border-color:var(--err);}
.field-error{font-size:12px;color:var(--err);display:none;}
.field.has-error .field-error{display:block;}
.form-actions{display:flex;justify-content:flex-end;margin-top:4px;}
.form-note{font-size:12px;color:var(--t3);}
.alert-ok{
  display:none;align-items:center;gap:10px;
  background:rgba(63,214,140,.12);border:1px solid rgba(63,214,140,.4);
  color:var(--ok);border-radius:12px;padding:12px 16px;font-size:14px;
}
.alert-ok.is-visible{display:flex;}
.alert-ok svg{width:18px;height:18px;flex:0 0 auto;}

/* ============ related entries ============ */
.entries{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.entry{
  display:flex;align-items:center;gap:16px;padding:20px 22px;
  border:1px solid var(--line);border-radius:var(--r-m);
  background:rgba(255,255,255,.02);text-decoration:none;color:inherit;
  transition:border-color .22s ease,transform .22s ease,background .22s ease;
}
.entry:hover{border-color:rgba(44,229,210,.42);transform:translateY(-3px);background:rgba(44,229,210,.04);text-decoration:none;}
.entry-idx{font-size:22px;font-weight:800;color:var(--accent);line-height:1;flex:0 0 auto;}
.entry strong{display:block;color:var(--t1);font-size:16px;font-weight:600;}
.entry span{font-size:13px;color:var(--t3);}

/* ============ footer ============ */
.site-footer{
  position:relative;background:var(--bg-1);padding:64px 0 28px;margin-top:0;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(120,180,220,0),rgba(120,180,220,.4),rgba(120,180,220,0));
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--t2);max-width:280px;}
.footer-domain{display:inline-block;margin-top:14px;font-size:14px;color:var(--primary);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  display:inline-block;font-size:14px;color:var(--t2);
  transition:color .2s ease,transform .2s ease;text-decoration:none;
}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);text-decoration:none;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);text-decoration:none;}
.footer-bottom a:hover{color:var(--primary);}

/* ============ responsive ============ */
@media (max-width:1280px){
  .hero h1{font-size:42px;}
  .metrics{grid-template-columns:repeat(4,1fr);}
}
@media (max-width:1024px){
  :root{--sec-pad:72px;}
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{grid-template-columns:1fr auto 1fr;}
  .brand{justify-self:start;}
  .mobile-panel{display:block;}
  .hero{padding-top:120px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:36px;}
  .hero-visual img{aspect-ratio:16/9;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;gap:0;}
  .step{padding:0 0 32px 0;}
  .step + .step{padding-left:0;padding-top:32px;border-top:1px solid var(--line);}
  .step + .step::before{display:none;}
  .proof{grid-template-columns:1fr;}
  .cms-list{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;gap:32px;padding:36px;}
  .entries{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media (max-width:767px){
  :root{--sec-pad:56px;}
  .container{padding:0 16px;}
  .hero{padding:104px 0 56px;}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-float{left:12px;bottom:12px;padding:12px 14px;}
  .trust-bar{gap:10px;font-size:13px;}
  .trust-sep{display:none;}
  .trust-bar span{width:100%;}
  .sec-head h2{font-size:24px;}
  .sec-head--row{flex-direction:column;align-items:flex-start;gap:12px;}
  .metrics{grid-template-columns:1fr;gap:16px;}
  .step-num{font-size:40px;}
  .step h3{font-size:19px;}
  .cms-list{grid-template-columns:1fr;}
  .proof-stats{grid-template-columns:1fr;}
  .cta-band{padding:24px;}
  .cta-band h2{font-size:24px;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:420px){
  .hero h1{font-size:28px;}
  .metric strong{font-size:28px;}
  .sec-head h2{font-size:22px;}
  .cta-band{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1424;
  --primary:#2CE5D2;
  --primary-deep:#12A99C;
  --primary-soft:rgba(44,229,210,.14);
  --accent:#FFB15C;
  --t1:#E8F1F8;
  --t2:#9FB3C8;
  --t3:#66798F;
  --link:#4FD8E8;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --glass:rgba(18,28,46,.72);
  --ok:#3FD68C;
  --err:#FF6B6B;
  --r-s:8px;
  --r-m:14px;
  --r-c:18px;
  --r-l:24px;
  --r-p:999px;
  --s1:0 2px 8px rgba(0,0,0,.28);
  --s2:0 12px 32px -12px rgba(0,0,0,.55);
  --s3:0 20px 48px -18px rgba(0,0,0,.7);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--link);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit}
h1,h2,h3,h4{color:var(--t1);margin:0;line-height:1.25;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(44,229,210,.28);color:#fff}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sec) 0}
.bg-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,11,20,.86);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{background:var(--glass);border-bottom-color:var(--line);box-shadow:var(--s1)}
.nav-inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;height:72px;transition:height .25s ease}
.site-header.scrolled .nav-inner{height:64px}
.nav-left,.nav-right{display:flex;align-items:center;gap:8px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:15px;color:var(--t2);font-weight:500;border-radius:var(--r-s);
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:center;transition:transform .2s ease;
}
.nav-link:hover{color:var(--t1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--t1)}
.nav-link.active::after{transform:scaleX(1)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);text-decoration:none}
.brand:hover{color:var(--t1)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  box-shadow:0 8px 22px -12px rgba(44,229,210,.9);
}
.brand-mark svg{width:21px;height:21px}
.brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:17px;font-weight:700;letter-spacing:.2px}
.brand-sub{font-size:11px;font-weight:500;color:var(--t3);letter-spacing:2px;margin-top:2px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);border-radius:12px;
  background:rgba(255,255,255,.03);position:relative;cursor:pointer;padding:0;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--t1);
  transform:translateX(-50%);transition:.22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{top:0;transform:translateX(-50%) rotate(45deg)}
.nav-toggle.open span::after{top:0;transform:translateX(-50%) rotate(-45deg)}
.mobile-panel{
  display:none;flex-direction:column;gap:6px;padding:12px 24px 22px;
  background:var(--glass);border-top:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
}
.mobile-panel.open{display:flex}
.m-link{display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:var(--r-m);font-size:16px;color:var(--t2);font-weight:500}
.m-link:hover,.m-link.active{background:var(--primary-soft);color:var(--t1)}
.mobile-panel .btn{margin-top:10px;width:100%;justify-content:center}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:1px solid transparent;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:0;cursor:pointer;text-decoration:none;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-primary{background:var(--primary);color:#04211F;box-shadow:0 8px 28px -10px rgba(44,229,210,.65)}
.btn-primary:hover{background:#43e9d7;color:#04211F;transform:translateY(-2px);box-shadow:0 10px 40px -10px rgba(44,229,210,.85)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(44,229,210,.7)}
.btn-accent{background:var(--accent);color:#2B1600;box-shadow:0 8px 26px -12px rgba(255,177,92,.8)}
.btn-accent:hover{background:#ffbe78;color:#2B1600;transform:translateY(-2px);box-shadow:0 12px 38px -12px rgba(255,177,92,.95)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line-strong);color:var(--t1)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:15px;font-weight:600;
  background:none;border:0;padding:0;cursor:pointer;
}
.btn-text:hover{color:#6ff0e2;gap:10px}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;transform:none;cursor:not-allowed}

/* ---------- Badges / chips ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 11px;border-radius:var(--r-p);
  font-size:12px;font-weight:600;letter-spacing:.2px;
  background:var(--primary-soft);color:var(--primary);
}
.badge-accent{background:rgba(255,177,92,.16);color:var(--accent)}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-p);
  border:1px solid var(--line-strong);font-size:13px;color:var(--t2);background:rgba(255,255,255,.02);
  transition:.2s ease;
}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* ---------- Article layout ---------- */
.crumb-bar{padding:22px 0 0;font-size:14px;color:var(--t3)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb a{color:var(--t3)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:rgba(120,180,220,.35)}
.crumb .now{color:var(--t2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-wrap{padding:36px 0 0}
.article-head{max-width:860px}
.article-head h1{
  font-size:44px;line-height:1.28;letter-spacing:-.4px;margin-bottom:22px;max-width:820px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  font-size:13px;color:var(--t3);padding-bottom:22px;border-bottom:1px solid var(--line);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(120,180,220,.4)}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-item svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8}

.article-body{
  max-width:800px;margin:44px 0 0;font-size:16px;line-height:1.85;color:var(--t2);
}
.article-body p{margin:0 0 1.25em}
.article-body h2{
  position:relative;font-size:26px;line-height:1.4;color:var(--t1);
  margin:2.1em 0 .9em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--primary),var(--primary-deep));
}
.article-body h3{font-size:18px;color:var(--t1);margin:1.7em 0 .7em;font-weight:700}
.article-body h4{font-size:16px;color:var(--t1);margin:1.4em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.4em}
.article-body ul li{list-style:disc;margin:.5em 0}
.article-body ol li{list-style:decimal;margin:.5em 0}
.article-body li::marker{color:var(--primary-deep)}
.article-body blockquote{
  margin:1.6em 0;padding:16px 22px;border-left:3px solid var(--primary);border-radius:0 12px 12px 0;
  background:rgba(44,229,210,.07);color:var(--t1);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:14px;margin:1.8em auto;box-shadow:var(--s2)}
.article-body figure{margin:1.8em 0}
.article-body figcaption,.article-body .caption{
  text-align:center;font-size:13px;color:var(--t3);margin-top:10px;
}
.article-body a{color:var(--link);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--primary)}
.article-body strong{color:var(--t1);font-weight:700}
.article-body code{
  background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;color:var(--primary);
}
.article-body pre{
  background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;overflow-x:auto;margin:1.6em 0;
}
.article-body pre code{background:none;border:0;padding:0;color:var(--t2)}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14px;
  display:block;overflow-x:auto;border:1px solid var(--line);border-radius:12px;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body th{background:rgba(255,255,255,.04);color:var(--t1);font-weight:600}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

.empty-block{
  max-width:800px;margin:44px 0 0;padding:52px 28px;text-align:center;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-c);
}
.empty-block .e-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;display:grid;place-items:center;
  background:var(--primary-soft);
}
.empty-block .e-icon svg{width:26px;height:26px;stroke:var(--primary);fill:none;stroke-width:1.7}
.empty-block h2{font-size:20px;margin-bottom:8px}
.empty-block p{font-size:15px;color:var(--t3);margin-bottom:22px}

.article-foot{
  max-width:800px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}
.back-row{display:flex;align-items:center;gap:8px}
.back-row svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}

/* ---------- Cards ---------- */
.cms-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cms-item{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-c);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--s2);transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.cms-item::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.12),rgba(255,255,255,0));
}
.cms-item:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.4);box-shadow:var(--s3)}
.cms-item .thumb{aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.03)}
.cms-item .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cms-item:hover .thumb img{transform:scale(1.04)}
.cms-item .body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.cms-item .c-title{font-size:17px;line-height:1.5;color:var(--t1);font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-item .c-title a{color:inherit;text-decoration:none}
.cms-item .c-title a:hover{color:var(--primary)}
.cms-item .c-desc{font-size:14px;line-height:1.7;color:var(--t2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-item .c-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--t3)}
.cms-item .c-date{display:inline-flex;align-items:center;gap:6px}
.cms-item .c-date svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:1.8}
.cms-item .stretch{position:absolute;inset:0;z-index:1}

.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:32px;letter-spacing:-.3px}
.section-head p{margin-top:10px;font-size:15px;color:var(--t3);max-width:560px}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;border:1px solid var(--line-strong);border-radius:var(--r-l);
  background:linear-gradient(135deg,rgba(18,28,46,.92),rgba(11,20,36,.92));
  padding:44px 48px;display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center;
}
.cta-panel::after{
  content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(44,229,210,.16),rgba(44,229,210,0) 70%);pointer-events:none;
}
.cta-panel h2{font-size:28px;margin-bottom:14px}
.cta-panel .lead{font-size:15px;color:var(--t2);max-width:520px}
.cta-points{display:grid;gap:10px;margin-top:20px}
.cta-points li{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--t2)}
.cta-points li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 10px rgba(44,229,210,.8);
}
.cta-actions{display:flex;flex-direction:column;align-items:flex-start;gap:14px;position:relative;z-index:1}
.cta-actions .hint{font-size:13px;color:var(--t3)}
.cta-actions .btn{min-width:220px}

/* ---------- Footer ---------- */
.site-footer{margin-top:0;border-top:1px solid var(--line);background:var(--bg-1);position:relative}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(44,229,210,0),rgba(44,229,210,.5),rgba(44,229,210,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.footer-brand p{margin:18px 0 14px;font-size:14px;line-height:1.8;color:var(--t3);max-width:320px}
.footer-domain{font-size:14px;color:var(--primary);font-weight:600}
.footer-col h4{font-size:14px;color:var(--t1);margin-bottom:18px;font-weight:600}
.footer-col ul{display:grid;gap:12px}
.footer-col a{font-size:14px;color:var(--t2);display:inline-block;transition:transform .2s ease,color .2s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 0 30px;border-top:1px solid var(--line);font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  :root{--sec:80px}
  .cms-list{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  :root{--sec:72px}
  .nav-left,.nav-right{display:none}
  .nav-inner{grid-template-columns:1fr auto;height:64px}
  .nav-toggle{display:block}
  .article-head h1{font-size:34px}
  .cta-panel{grid-template-columns:1fr;padding:36px 28px;gap:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;padding:52px 0 32px}
}
@media (max-width:767px){
  :root{--sec:56px}
  .container{padding:0 16px}
  .mobile-panel{padding:10px 16px 20px}
  .article-wrap{padding-top:24px}
  .article-head h1{font-size:28px;letter-spacing:-.2px;margin-bottom:18px}
  .article-body{margin-top:32px;font-size:15px;line-height:1.85}
  .article-body h2{font-size:21px;padding-left:14px}
  .article-body h3{font-size:17px}
  .section-head h2{font-size:24px}
  .cms-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .article-foot{flex-direction:column;align-items:flex-start}
  .cta-panel h2{font-size:22px}
}
@media (max-width:420px){
  .brand-text{font-size:15px}
  .brand-sub{letter-spacing:1px}
  .article-head h1{font-size:24px}
  .cta-panel{padding:28px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category1 */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1424;
  --bg-2:#0E1A2C;
  --primary:#2CE5D2;
  --primary-deep:#12A99C;
  --primary-soft:rgba(44,229,210,.14);
  --accent:#FFB15C;
  --accent-soft:rgba(255,177,92,.14);
  --t1:#E8F1F8;
  --t2:#9FB3C8;
  --t3:#66798F;
  --link:#4FD8E8;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --ok:#3FD68C;
  --err:#FF6B6B;
  --glass:rgba(18,28,46,.72);
  --r-s:8px;
  --r-m:14px;
  --r-card:18px;
  --r-lg:24px;
  --r-pill:999px;
  --s1:0 2px 8px rgba(0,0,0,.28);
  --s2:0 12px 32px -12px rgba(0,0,0,.55);
  --s3:0 20px 48px -18px rgba(0,0,0,.7),0 0 0 1px rgba(44,229,210,.16);
  --sp:8px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--link);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:var(--primary);}
button{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--t1);line-height:1.25;font-weight:700;}
p{margin:0 0 1.15em;}
p:last-child{margin-bottom:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;color:var(--primary);
  background:var(--primary-soft);border:1px solid rgba(44,229,210,.24);
  padding:5px 14px;border-radius:var(--r-pill);
}
.badge{
  display:inline-block;font-size:12px;line-height:1.6;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary);
  border:1px solid rgba(44,229,210,.22);
}
.badge--accent{background:var(--accent-soft);color:var(--accent);border-color:rgba(255,177,92,.28);}
.muted{color:var(--t3);font-size:14px;}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,11,20,.86);
  border-bottom:1px solid transparent;
  transition:background .25s ease,height .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.scrolled{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line);
}
.nav-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:72px;gap:16px;transition:height .25s ease;
}
.site-header.scrolled .nav-inner{height:64px;}
.nav-left,.nav-right{display:flex;align-items:center;gap:6px;}
.nav-right{justify-content:flex-end;gap:12px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 10px;
  font-size:15px;color:var(--t2);
  border-radius:var(--r-s);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;
  height:2px;background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--t1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--t1);}
.nav-link.active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);justify-self:center;}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px -8px rgba(44,229,210,.7);
}
.brand-mark svg{width:19px;height:19px;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;font-size:16px;font-weight:700;letter-spacing:.01em;}
.brand-sub{font-size:11px;font-weight:400;color:var(--t3);letter-spacing:.14em;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-s);
  background:transparent;border:1px solid var(--line-strong);
  position:relative;cursor:pointer;justify-self:end;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--t1);
  border-radius:2px;transform:translateX(-50%);transition:.22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg);}
.mobile-panel{
  display:none;flex-direction:column;gap:4px;
  padding:12px 24px 24px;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  max-height:0;overflow:hidden;opacity:0;
  transition:max-height .22s ease,opacity .22s ease,padding .22s ease;
}
.mobile-panel.open{max-height:420px;opacity:1;}
.m-link{
  display:flex;align-items:center;height:48px;padding:0 12px;
  color:var(--t2);font-size:15px;border-radius:var(--r-s);
  border-bottom:1px solid var(--line);
}
.m-link:hover,.m-link.active{color:var(--t1);background:rgba(255,255,255,.03);}
.mobile-panel .btn{margin-top:12px;width:100%;justify-content:center;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:0;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease,opacity .2s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn-primary{
  background:var(--primary);color:#04211F;
  box-shadow:0 8px 28px -10px rgba(44,229,210,.65);
}
.btn-primary:hover{background:#3FEFDD;color:#04211F;transform:translateY(-2px);box-shadow:0 12px 40px -10px rgba(44,229,210,.85);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -8px rgba(44,229,210,.6);}
.btn-accent{
  background:var(--accent);color:#241505;
  box-shadow:0 8px 28px -10px rgba(255,177,92,.6);
}
.btn-accent:hover{background:#FFC079;color:#241505;transform:translateY(-2px);box-shadow:0 12px 40px -10px rgba(255,177,92,.8);}
.btn-accent:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--t1);border-color:var(--line-strong);
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;transform:none;cursor:not-allowed;}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-size:15px;font-weight:600;padding:0;height:auto;
}
.btn-text:hover{color:#6BF2E3;}
.btn-text svg{transition:transform .2s ease;}
.btn-text:hover svg{transform:translateX(3px);}

/* ============ 面包屑 ============ */
.crumb-wrap{padding:28px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t3);}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:rgba(120,180,220,.35);}
.crumb .current{color:var(--t2);}

/* ============ 首图带 ============ */
.hero-band{
  position:relative;margin-top:24px;border-radius:var(--r-lg);
  overflow:hidden;min-height:240px;
  display:flex;align-items:center;
  border:1px solid var(--line);
}
.hero-band__img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;filter:saturate(.9);
}
.hero-band__mask{
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,11,20,.94) 0%,rgba(6,11,20,.72) 52%,rgba(6,11,20,.42) 100%);
}
.hero-band__grid{
  position:absolute;inset:0;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:44px 44px;
}
.hero-band__body{position:relative;z-index:2;padding:40px 40px;max-width:720px;}
.hero-band h1{
  font-size:44px;margin:14px 0 12px;letter-spacing:-.01em;
}
.hero-band h1 em{font-style:normal;color:var(--primary);}
.hero-band p{font-size:16px;color:var(--t2);max-width:620px;margin-bottom:0;}

/* ============ 指标条 ============ */
.metric-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;margin-top:28px;
}
.metric{background:var(--bg-1);padding:22px 24px;}
.metric b{display:block;font-size:28px;color:var(--accent);line-height:1.2;font-weight:700;}
.metric span{display:block;font-size:13px;color:var(--t3);margin-top:6px;}

/* ============ 主内容双栏 ============ */
.layout{
  display:grid;grid-template-columns:236px minmax(0,1fr);
  gap:48px;align-items:start;margin-top:56px;
}
.toc{
  position:sticky;top:96px;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--bg-1);padding:22px 20px;
}
.toc h2{
  font-size:13px;letter-spacing:.12em;color:var(--t3);font-weight:600;
  text-transform:uppercase;margin-bottom:14px;
}
.toc ol{display:flex;flex-direction:column;gap:2px;}
.toc a{
  display:block;font-size:14px;color:var(--t2);
  padding:9px 12px;border-radius:var(--r-s);
  border-left:2px solid transparent;
  transition:all .2s ease;
}
.toc a:hover{color:var(--t1);background:rgba(255,255,255,.04);}
.toc a.active{
  color:var(--primary);border-left-color:var(--primary);
  background:var(--primary-soft);
}
.toc__note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);line-height:1.7;
}

.content-col{min-width:0;}
.doc-section{
  padding:0 0 44px;margin-bottom:44px;
  border-bottom:1px solid var(--line);
}
.doc-section:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.doc-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:16px;}
.doc-num{
  font-size:40px;font-weight:800;line-height:1;
  color:var(--accent);letter-spacing:-.02em;
  flex:0 0 auto;padding-top:2px;
}
.doc-head h2{font-size:28px;margin-bottom:6px;}
.doc-head .doc-kicker{font-size:13px;color:var(--t3);margin:0;}
.doc-section p{color:var(--t2);}
.doc-list{display:flex;flex-direction:column;gap:12px;margin:20px 0 0;}
.doc-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--t2);line-height:1.8;
}
.doc-list li::before{
  content:"";position:absolute;left:0;top:10px;
  width:8px;height:8px;border-radius:2px;
  background:var(--primary-soft);border:1px solid rgba(44,229,210,.4);
}
.doc-list li strong{color:var(--t1);font-weight:600;}
.callout{
  margin-top:22px;padding:18px 22px;
  border-left:3px solid var(--primary);
  background:var(--primary-soft);border-radius:0 var(--r-m) var(--r-m) 0;
  font-size:15px;color:var(--t1);line-height:1.8;
}
.callout b{color:var(--primary);}
.doc-figure{margin:24px 0 0;border-radius:var(--r-m);overflow:hidden;border:1px solid var(--line);}
.doc-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.doc-figure figcaption{font-size:13px;color:var(--t3);text-align:center;padding:10px 12px;background:var(--bg-1);}

/* ============ 适用场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:36px;}
.scene-card{
  position:relative;
  background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.scene-card::before{
  content:"";position:absolute;top:0;left:18px;right:18px;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.16),transparent);
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.4);box-shadow:var(--s3);}
.scene-card h3{font-size:19px;margin:12px 0 10px;}
.scene-card p{font-size:15px;margin:0;color:var(--t2);}
.scene-card--wide{grid-column:span 2;}

/* ============ FAQ ============ */
.faq-list{max-width:840px;margin:36px auto 0;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 16px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--t1);
  border-left:3px solid transparent;
  transition:background .2s ease,border-color .2s ease;
}
.faq-q:hover{background:rgba(255,255,255,.03);}
.faq-item.open .faq-q{border-left-color:var(--primary);background:rgba(44,229,210,.06);}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item.open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .22s ease;
}
.faq-a p{padding:0 16px 22px 19px;font-size:15px;line-height:1.8;color:var(--t2);}

/* ============ 相关入口 ============ */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:32px;}
.related-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;color:var(--t2);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.related-card:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.4);box-shadow:var(--s3);color:var(--t2);}
.related-card h3{font-size:18px;color:var(--t1);}
.related-card p{font-size:14px;margin:0;color:var(--t3);}
.related-card .go{font-size:14px;color:var(--primary);font-weight:600;margin-top:auto;}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(18,28,46,.94),rgba(11,20,36,.96));
  padding:44px 40px;
  display:grid;grid-template-columns:1.35fr 1fr;gap:40px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;right:-140px;top:-140px;
  width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(44,229,210,.16),transparent 62%);
  pointer-events:none;
}
.cta-band h2{font-size:30px;margin-bottom:14px;}
.cta-list{display:flex;flex-direction:column;gap:10px;margin-top:18px;}
.cta-list li{position:relative;padding-left:20px;font-size:15px;color:var(--t2);}
.cta-list li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;
  background:var(--accent);
}
.cta-actions{position:relative;z-index:2;display:flex;flex-direction:column;gap:14px;}
.cta-actions .btn{width:100%;}
.cta-actions .hint{font-size:13px;color:var(--t3);text-align:center;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,229,210,.55),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;padding:64px 0 40px;
}
.footer-brand p{font-size:14px;color:var(--t3);margin:16px 0 14px;max-width:320px;}
.footer-domain{font-size:14px;color:var(--link);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--t2);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  padding:20px 0 32px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 20px;}
  .hero-band h1{font-size:38px;}
  .metric-bar{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:1023px){
  .nav-left,.nav-right{display:none;}
  .nav-inner{grid-template-columns:auto 1fr auto;height:64px;}
  .brand{justify-self:start;}
  .nav-toggle{display:block;}
  .mobile-panel{display:flex;}
  .section{padding:72px 0;}
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;margin-top:40px;}
  .toc{position:static;}
  .toc ol{flex-direction:row;flex-wrap:wrap;gap:8px;}
  .toc a{border-left:0;border:1px solid var(--line);border-radius:var(--r-pill);padding:7px 14px;font-size:13px;}
  .toc a.active{border-color:var(--primary);}
  .toc__note{display:none;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:1fr;padding:36px 28px;gap:28px;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .hero-band{min-height:auto;}
  .hero-band__body{padding:28px 20px;}
  .hero-band h1{font-size:30px;}
  .metric-bar{grid-template-columns:1fr;}
  .doc-num{font-size:32px;}
  .doc-head h2{font-size:23px;}
  .scene-grid{grid-template-columns:minmax(0,1fr);}
  .scene-card--wide{grid-column:span 1;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .cta-band h2{font-size:24px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding:48px 0 32px;}
  .footer-bottom{flex-direction:column;}
  .brand-text{font-size:15px;}
}
@media (max-width:420px){
  .hero-band h1{font-size:26px;}
  .doc-head{flex-direction:column;gap:8px;}
  .toc{padding:18px 16px;}
  .cta-band{padding:28px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1424;
  --primary:#2CE5D2;
  --primary-deep:#12A99C;
  --primary-soft:rgba(44,229,210,.14);
  --accent:#FFB15C;
  --t1:#E8F1F8;
  --t2:#9FB3C8;
  --t3:#66798F;
  --link:#4FD8E8;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --ok:#3FD68C;
  --warn:#FFB15C;
  --err:#FF6B6B;
  --glass:rgba(18,28,46,.72);
  --r-s:8px; --r-m:14px; --r-card:18px; --r-lg:24px; --r-pill:999px;
  --s1:0 2px 8px rgba(0,0,0,.28);
  --s2:0 12px 32px -12px rgba(0,0,0,.55);
  --s3:0 20px 48px -18px rgba(0,0,0,.7);
  --container:1200px;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--link);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary);}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--t1);line-height:1.25;font-weight:700;letter-spacing:0;}
p{margin:0 0 1.25em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(44,229,210,.28);color:#fff;}
/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);background:var(--primary-soft);
  border:1px solid rgba(44,229,210,.22);
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:20px;
}
.eyebrow--accent{color:var(--accent);background:rgba(255,177,92,.12);border-color:rgba(255,177,92,.26);}
h2{font-size:32px;margin-bottom:16px;}
h3{font-size:22px;margin-bottom:12px;}
.section-head p{font-size:16px;color:var(--t2);max-width:38em;}
/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,11,20,.86);
  border-bottom:1px solid transparent;
  transition:background .25s ease,height .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--line);
  box-shadow:var(--s2);
}
.nav-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:72px;transition:height .25s ease;position:relative;
}
.site-header.is-scrolled .nav-inner{height:64px;}
.nav-left{display:flex;align-items:center;gap:28px;}
.nav-right{display:flex;align-items:center;gap:20px;justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;color:var(--t2);padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);
  transform-origin:center;transition:transform .2s ease;
}
.nav-link:hover{color:var(--t1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--t1);}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px -8px rgba(44,229,210,.75);
}
.brand-mark svg{width:19px;height:19px;}
.brand-text{
  display:flex;flex-direction:column;line-height:1.15;
  font-size:16px;font-weight:700;color:var(--t1);letter-spacing:.01em;
}
.brand-sub{font-size:11px;font-weight:500;color:var(--t3);letter-spacing:.12em;margin-top:3px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);
  border-radius:12px;background:transparent;cursor:pointer;padding:0;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--t1);
  border-radius:2px;transform:translateX(-50%);transition:transform .2s ease,background .2s ease,top .2s ease;
}
.nav-toggle{position:relative;}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;}
.nav-toggle span::after{content:"";top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{top:0;transform:translateX(-50%) rotate(45deg);}
.nav-toggle.is-open span::after{top:0;transform:translateX(-50%) rotate(-45deg);}
.mobile-panel{
  display:none;background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--line);padding:12px 24px 24px;
}
.mobile-panel.is-open{display:block;animation:panelIn .22s ease;}
@keyframes panelIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:translateY(0);}}
.m-link{display:block;height:48px;line-height:48px;font-size:15px;color:var(--t2);border-bottom:1px solid var(--line);}
.m-link:hover,.m-link.is-active{color:var(--primary);}
.mobile-panel .btn{margin-top:20px;width:100%;}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:0;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,opacity .2s ease;
  text-align:center;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--primary);color:#04211F;box-shadow:0 8px 28px -10px rgba(44,229,210,.65);}
.btn-primary:hover{color:#04211F;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 12px 40px -12px rgba(44,229,210,.85);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(44,229,210,.6);}
.btn-accent{background:var(--accent);color:#2A1602;box-shadow:0 8px 26px -12px rgba(255,177,92,.7);}
.btn-accent:hover{color:#2A1602;filter:brightness(1.06);transform:translateY(-2px);}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line-strong);color:var(--t1);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-text{height:auto;padding:0;background:none;color:var(--primary);font-weight:600;}
.btn-text:hover{color:var(--primary);text-decoration:underline;text-underline-offset:5px;}
.btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none;}
/* ============ 面包屑 ============ */
.crumb-bar{padding:24px 0 0;background:var(--bg-0);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t3);}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--t3);}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--primary);}
.crumb li[aria-current]{color:var(--t2);}
/* ============ 页头 ============ */
.page-head{
  position:relative;padding:56px 0 72px;overflow:hidden;
  background:
    radial-gradient(760px 340px at 18% 0%,rgba(44,229,210,.10),transparent 68%),
    linear-gradient(180deg,rgba(6,11,20,.78),rgba(6,11,20,.97)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-head::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
.page-head .container{position:relative;z-index:1;}
.page-head h1{font-size:48px;max-width:15em;margin-bottom:20px;}
.lead{font-size:17px;color:var(--t2);max-width:44em;}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;
  font-size:12px;border-radius:var(--r-pill);
  background:var(--primary-soft);color:var(--primary);
  border:1px solid rgba(44,229,210,.2);
}
.tag--accent{background:rgba(255,177,92,.12);color:var(--accent);border-color:rgba(255,177,92,.24);}
/* ============ 指标条 ============ */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px;
}
.metric{
  background:rgba(255,255,255,.02);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 22px;position:relative;overflow:hidden;
}
.metric::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(255,255,255,.18),transparent);
}
.metric-num{font-size:30px;font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:.01em;}
.metric-num small{font-size:14px;font-weight:500;color:var(--t3);margin-left:4px;}
.metric-label{font-size:13px;color:var(--t3);margin-top:6px;}
/* ============ 时间线 ============ */
.timeline{position:relative;border-left:1px solid var(--line-strong);margin-left:10px;padding-left:0;}
.tl-item{position:relative;padding:0 0 40px 36px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-6px;top:6px;width:11px;height:11px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--primary);box-shadow:0 0 0 4px rgba(44,229,210,.10);
}
.tl-item--accent::before{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,177,92,.12);}
.tl-step{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.14em;}
.tl-item h3{font-size:20px;margin:6px 0 10px;max-width:24em;}
.tl-item p{color:var(--t2);max-width:44em;}
.tl-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px;margin-top:16px;}
.tl-points li{
  position:relative;padding-left:18px;font-size:14px;color:var(--t3);
}
.tl-points li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;
  background:var(--primary);opacity:.7;
}
/* ============ 双列清单 + 图 ============ */
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:start;}
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
.check-card{
  background:rgba(255,255,255,.02);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.check-card:hover{border-color:rgba(44,229,210,.4);transform:translateY(-3px);box-shadow:var(--s3);}
.check-card h4{font-size:16px;margin-bottom:8px;}
.check-card p{font-size:14px;color:var(--t2);}
.figure-band{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--bg-1);box-shadow:var(--s2);
}
.figure-band img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.figure-cap{padding:18px 20px;font-size:13px;color:var(--t3);border-top:1px solid var(--line);}
/* ============ 风险信号 ============ */
.risk-list{display:grid;gap:14px;}
.risk-item{
  display:grid;grid-template-columns:120px 1fr;gap:20px;align-items:start;
  background:rgba(255,255,255,.02);border:1px solid var(--line);
  border-left:3px solid var(--warn);
  border-radius:var(--r-m);padding:20px 22px;transition:background .2s ease,border-color .2s ease;
}
.risk-item:hover{background:rgba(255,255,255,.04);border-color:var(--line-strong);border-left-color:var(--warn);}
.risk-item--err{border-left-color:var(--err);}
.risk-item--ok{border-left-color:var(--ok);}
.risk-level{font-size:13px;font-weight:700;color:var(--warn);letter-spacing:.06em;}
.risk-item--err .risk-level{color:var(--err);}
.risk-item--ok .risk-level{color:var(--ok);}
.risk-body h4{font-size:16px;margin-bottom:6px;}
.risk-body p{font-size:14px;color:var(--t2);}
/* ============ FAQ ============ */
.faq-wrap{max-width:840px;margin:0 auto;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 6px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--t1);
  border-left:3px solid transparent;transition:background .2s ease,border-color .2s ease,padding .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";font-size:20px;color:var(--primary);line-height:1;flex:none;}
.faq-item[open] summary::after{content:"–";}
.faq-item summary:hover{background:rgba(255,255,255,.03);}
.faq-item[open] summary{border-left-color:var(--primary);background:rgba(44,229,210,.05);padding-left:16px;}
.faq-answer{padding:2px 6px 22px 19px;font-size:15px;line-height:1.8;color:var(--t2);max-width:44em;}
/* ============ 相关入口 ============ */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.entry-card{
  display:flex;flex-direction:column;gap:12px;
  background:rgba(255,255,255,.02);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;height:100%;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.entry-card:hover{border-color:rgba(44,229,210,.4);transform:translateY(-4px);box-shadow:var(--s3);}
.entry-card .tag{align-self:flex-start;}
.entry-card h3{font-size:19px;}
.entry-card p{font-size:14px;color:var(--t2);flex:1;}
.entry-card span.more{font-size:14px;font-weight:600;color:var(--primary);}
/* ============ CTA ============ */
.cta-band{
  position:relative;border:1px solid var(--line-strong);border-radius:var(--r-lg);
  padding:40px;overflow:hidden;background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:start;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 260px at 12% 10%,rgba(44,229,210,.16),transparent 70%);
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:30px;}
.cta-list{display:grid;gap:10px;margin-top:20px;}
.cta-list li{position:relative;padding-left:20px;font-size:15px;color:var(--t2);}
.cta-list li::before{
  content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;
  background:var(--accent);opacity:.9;
}
.form-grid{display:grid;gap:16px;}
.form-row{display:grid;gap:8px;}
.form-row label{font-size:13px;color:var(--t3);}
.form-row input,.form-row textarea{
  width:100%;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:12px;padding:0 16px;height:48px;color:var(--t1);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-row textarea{height:auto;min-height:96px;padding:12px 16px;resize:vertical;line-height:1.7;}
.form-row input::placeholder,.form-row textarea::placeholder{color:#5D6E82;}
.form-row input:focus,.form-row textarea:focus{
  outline:none;border-color:var(--primary);background:rgba(44,229,210,.06);
  box-shadow:0 0 0 4px rgba(44,229,210,.14);
}
.form-row.has-error input,.form-row.has-error textarea{border-color:var(--err);}
.form-error{font-size:12px;color:var(--err);display:none;}
.form-row.has-error .form-error{display:block;}
.form-actions{display:flex;justify-content:flex-end;}
.form-note{
  display:none;align-items:center;gap:10px;
  background:rgba(63,214,140,.12);border:1px solid rgba(63,214,140,.35);
  color:var(--ok);border-radius:12px;padding:12px 16px;font-size:14px;
}
.form-note.is-visible{display:flex;}
/* ============ 页脚 ============ */
.site-footer{
  margin-top:0;padding:64px 0 32px;background:var(--bg-1);
  border-top:1px solid var(--line);position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(44,229,210,.5),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:14px;color:var(--t3);margin:18px 0 14px;max-width:30em;}
.footer-domain{font-size:14px;color:var(--link);}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--t2);display:inline-block;transition:color .2s ease,transform .2s ease;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3);}
.footer-bottom a:hover{color:var(--primary);}
/* ============ 响应式 ============ */
@media (max-width:1279px){
  .metric-strip{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:1023px){
  .nav-left,.nav-right{display:none;}
  .nav-inner{display:flex;justify-content:space-between;height:64px;}
  .nav-toggle{display:block;}
  .site-header.is-scrolled .nav-inner{height:60px;}
  .section{padding:72px 0;}
  .page-head h1{font-size:36px;}
  .split{grid-template-columns:1fr;}
  .entry-grid{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  body{font-size:15px;}
  .page-head{padding:40px 0 56px;}
  .page-head h1{font-size:32px;}
  .lead{font-size:15px;}
  .metric-strip{grid-template-columns:1fr 1fr;gap:12px;}
  .metric{padding:16px;}
  .metric-num{font-size:24px;}
  .check-grid{grid-template-columns:1fr;}
  .tl-points{grid-template-columns:1fr;}
  .risk-item{grid-template-columns:1fr;gap:8px;}
  .entry-grid{grid-template-columns:1fr;}
  .cta-band{padding:24px;}
  .form-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .btn{width:100%;}
  .nav-toggle{width:44px;}
}
@media (max-width:420px){
  .page-head h1{font-size:28px;}
  .metric-strip{grid-template-columns:1fr;}
  .faq-item summary{font-size:16px;padding:16px 4px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category3 */
:root{
  --bg-0:#060B14;
  --bg-1:#0B1424;
  --primary:#2CE5D2;
  --primary-deep:#12A99C;
  --primary-soft:rgba(44,229,210,.14);
  --accent:#FFB15C;
  --t1:#E8F1F8;
  --t2:#9FB3C8;
  --t3:#66798F;
  --link:#4FD8E8;
  --line:rgba(120,180,220,.14);
  --line-strong:rgba(120,180,220,.26);
  --glass:rgba(18,28,46,.72);
  --r-s:8px;
  --r-m:14px;
  --r-card:18px;
  --r-l:24px;
  --r-p:999px;
  --s1:0 2px 8px rgba(0,0,0,.28);
  --s2:0 12px 32px -12px rgba(0,0,0,.55);
  --s3:0 20px 48px -18px rgba(0,0,0,.7);
  --section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--link);text-decoration:none;transition:color .2s ease}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--t1);line-height:1.25;font-weight:700}
p{margin:0 0 1.25em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(44,229,210,.28);color:#fff}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:0;cursor:pointer;
  text-decoration:none;white-space:nowrap;
  transition:transform .2s ease,box-shadow .25s ease,background-color .2s ease,border-color .2s ease,color .2s ease,opacity .2s ease;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:var(--primary);color:#04211F;
  box-shadow:0 8px 28px -10px rgba(44,229,210,.65);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 14px 40px -10px rgba(44,229,210,.7)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(44,229,210,.6)}
.btn-accent{
  background:var(--accent);color:#231403;
  box-shadow:0 8px 28px -10px rgba(255,177,92,.6);
}
.btn-accent:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 40px -10px rgba(255,177,92,.66)}
.btn-accent:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(255,177,92,.55)}
.btn-ghost{
  background:rgba(255,255,255,.02);color:var(--t1);border-color:var(--line-strong);
}
.btn-ghost:hover{border-color:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.4;pointer-events:none;box-shadow:none;transform:none}
.btn.is-loading::after{
  content:"";width:15px;height:15px;border-radius:50%;
  border:2px solid rgba(4,33,31,.35);border-top-color:#04211F;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-p);
  background:var(--primary-soft);color:var(--primary);
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge-accent{background:rgba(255,177,92,.14);color:var(--accent)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,11,20,.82);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(11,20,36,.78);
  border-bottom-color:var(--line);
  box-shadow:var(--s1);
}
.nav-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:16px;height:72px;transition:height .25s ease;
}
.site-header.is-scrolled .nav-inner{height:64px}
.nav-left{display:flex;align-items:center;gap:26px}
.nav-right{display:flex;align-items:center;gap:18px;justify-self:end}
.nav-link{
  position:relative;padding:6px 0;color:var(--t2);
  font-size:15px;font-weight:500;line-height:1.4;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--t1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--t1)}
.nav-link.active::after{transform:scaleX(1)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  box-shadow:0 8px 22px -10px rgba(44,229,210,.85);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{
  display:flex;flex-direction:column;
  font-size:17px;font-weight:700;line-height:1.15;white-space:nowrap;
}
.brand-sub{font-size:11px;font-weight:400;color:var(--t3);letter-spacing:.16em}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:rgba(255,255,255,.03);border:1px solid var(--line-strong);
  border-radius:12px;cursor:pointer;
}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--t1);border-radius:2px}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);border-radius:2px;
  transition:transform .22s ease,top .22s ease,opacity .22s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}
.mobile-panel{
  display:none;flex-direction:column;gap:4px;
  padding:12px 24px 24px;
  background:rgba(11,20,36,.92);
  border-top:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
}
.mobile-panel.is-open{display:flex}
.m-link{
  display:flex;align-items:center;min-height:48px;padding:0 4px;
  color:var(--t2);font-size:15px;border-bottom:1px solid var(--line);
}
.m-link:hover,.m-link.active{color:var(--primary)}
.mobile-panel .btn{margin-top:14px;width:100%}

/* ---------- 内页首屏 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 64px;
  background:
    radial-gradient(560px 320px at 88% 0%, rgba(44,229,210,.10), transparent 70%),
    linear-gradient(180deg,var(--bg-0),var(--bg-1));
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,180,220,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,180,220,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(70% 60% at 75% 10%,#000,transparent 75%);
  -webkit-mask-image:radial-gradient(70% 60% at 75% 10%,#000,transparent 75%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;font-size:14px;color:var(--t3)}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:var(--t2)}
.page-hero h1{
  max-width:22ch;margin:16px 0 0;
  font-size:48px;letter-spacing:-.5px;
}
.page-hero .lead{max-width:60ch;margin:20px 0 0;font-size:17px;line-height:1.8;color:var(--t2)}
.quick-jump{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:40px;padding:0 18px;border-radius:var(--r-p);
  background:rgba(255,255,255,.03);border:1px solid var(--line-strong);
  color:var(--t2);font-size:14px;font-weight:500;
  transition:border-color .2s ease,color .2s ease,transform .2s ease,background-color .2s ease;
}
.chip:hover{color:var(--t1);border-color:rgba(44,229,210,.5);background:var(--primary-soft);transform:translateY(-2px)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--section) 0}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:52px}
.section-head h2{font-size:32px;letter-spacing:-.3px}
.section-head p{margin-top:16px;font-size:16px;color:var(--t2)}
.section-head .badge{margin-bottom:14px}

/* ---------- 问答卡片墙 ---------- */
.qa-group{padding-top:8px}
.qa-group + .qa-group{margin-top:56px}
.group-bar{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:16px}
.group-bar h2{font-size:22px;display:flex;align-items:center;gap:12px}
.group-bar h2::before{
  content:"";width:4px;height:22px;border-radius:3px;flex:none;
  background:linear-gradient(180deg,var(--primary),var(--primary-deep));
}
.group-bar span{font-size:14px;color:var(--t3)}
.qa-wall{columns:2;column-gap:24px;margin-top:28px}
.qa-card{
  position:relative;break-inside:avoid;
  margin:0 0 24px;padding:24px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--s1);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.qa-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:18px 18px 0 0;
  background:linear-gradient(90deg,rgba(255,255,255,.16),transparent 70%);
}
.qa-card:hover{
  transform:translateY(-4px);
  border-color:rgba(44,229,210,.42);
  box-shadow:var(--s3),0 0 0 1px rgba(44,229,210,.12) inset;
}
.qa-card h3{font-size:19px;line-height:1.5}
.qa-card p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--t2)}
.qa-card .qa-note{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-size:13px;color:var(--t3);
}
.qa-card .qa-note b{color:var(--accent);font-weight:600}
.qa-card.is-wide{}

/* ---------- 引导条 ---------- */
.guide-bar{
  display:grid;grid-template-columns:1.4fr .9fr;gap:32px;align-items:center;
  padding:32px;border-radius:var(--r-l);
  background:linear-gradient(120deg,rgba(18,28,46,.92),rgba(11,20,36,.78));
  border:1px solid var(--line-strong);
  box-shadow:var(--s2);
}
.guide-bar h2{font-size:26px}
.guide-bar p{margin-top:14px;font-size:15px;line-height:1.8}
.guide-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.guide-figure{
  position:relative;border-radius:var(--r-m);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:16/10;
}
.guide-figure img{width:100%;height:100%;object-fit:cover}
.guide-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,.05),rgba(6,11,20,.55));
}

/* ---------- 相关入口 ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.entry-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--s1);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(44,229,210,.42);box-shadow:var(--s3)}
.entry-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0e1a2c}
.entry-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.entry-card:hover .thumb img{transform:scale(1.05)}
.entry-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,11,20,0) 40%,rgba(6,11,20,.55));
}
.entry-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.entry-body h3{font-size:19px}
.entry-body p{font-size:14px;line-height:1.8;color:var(--t2);margin:0}
.entry-link{margin-top:auto;padding-top:8px;font-size:14px;font-weight:600;color:var(--primary)}
.entry-link::after{content:" →"}

/* ---------- 精简 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  padding:64px 0;
  background:
    radial-gradient(600px 320px at 12% 100%, rgba(44,229,210,.10), transparent 70%),
    var(--bg-1);
  border-top:1px solid var(--line);
}
.cta-panel{
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
  padding:40px;border-radius:var(--r-l);
  background:linear-gradient(120deg,rgba(18,28,46,.9),rgba(11,20,36,.72));
  border:1px solid var(--line-strong);
  box-shadow:var(--s2);
}
.cta-panel h2{font-size:28px}
.cta-panel .cta-list{margin-top:20px;display:grid;gap:10px}
.cta-panel .cta-list li{
  position:relative;padding-left:20px;font-size:15px;color:var(--t2);
}
.cta-panel .cta-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;
  background:var(--primary);transform:rotate(45deg);
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

/* ---------- 页脚 ---------- */
.site-footer{
  padding:72px 0 32px;
  background:var(--bg-0);
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg,transparent,rgba(120,180,220,.28),transparent) 1;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin:18px 0 14px;font-size:14px;line-height:1.8;color:var(--t2);max-width:34ch}
.footer-domain{font-size:14px;font-weight:600;color:var(--primary)}
.footer-col h4{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px}
.footer-col li + li{margin-top:10px}
.footer-col a{font-size:14px;color:var(--t2);display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:48px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--section:80px}
  .page-hero h1{font-size:42px}
}
@media (max-width:1023px){
  :root{--section:72px}
  .nav-left,.nav-right{display:none}
  .nav-inner{grid-template-columns:auto auto;justify-content:space-between;height:68px}
  .nav-toggle{display:flex}
  .brand-text{font-size:16px}
  .page-hero{padding:56px 0 48px}
  .page-hero h1{font-size:34px;max-width:none}
  .qa-wall{columns:1}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .guide-bar{grid-template-columns:1fr;gap:24px}
  .guide-figure{aspect-ratio:16/7}
  .cta-panel{grid-template-columns:1fr;gap:28px;padding:32px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  :root{--section:56px}
  .container{padding:0 16px}
  body{font-size:15px}
  .page-hero{padding:40px 0 40px}
  .page-hero h1{font-size:29px}
  .page-hero .lead{font-size:15px}
  .section-head{margin-bottom:36px}
  .section-head h2{font-size:24px}
  .group-bar h2{font-size:19px}
  .qa-card{padding:20px}
  .qa-card h3{font-size:17px}
  .entry-grid{grid-template-columns:1fr}
  .cta-panel{padding:24px}
  .cta-panel h2{font-size:22px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .guide-actions{flex-direction:column}
  .guide-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .page-hero h1{font-size:25px}
  .brand-sub{display:none}
  .chip{padding:0 14px;font-size:13px}
  .btn{padding:0 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}