/* roulang page: index */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --brand-500:#38CFFF;
  --brand-600:#1FB8F0;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--ink-1);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}
.container{max-width:1200px;margin:0 auto;padding:0 16px;}
@media (min-width:1024px){.container{padding:0 24px;}}
.section{padding:64px 0;}
@media (min-width:1024px){.section{padding:96px 0;}}
.num{font-variant-numeric:tabular-nums;}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:#F7FAFF;
  border-bottom:1px solid rgba(11,27,43,.08);
  transition:box-shadow .25s ease-out;
}
.site-header.scrolled{box-shadow:0 12px 34px -22px rgba(11,27,43,.55);}
.nav-wrap{
  max-width:1200px;margin:0 auto;padding:0 16px;
  height:70px;display:flex;align-items:center;gap:20px;
}
@media (min-width:1024px){.nav-wrap{padding:0 24px;gap:28px;}}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;
  background:linear-gradient(135deg,#2DD4BF,#38CFFF);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px -10px rgba(56,207,255,.9);
}
.brand-mark svg{width:16px;height:16px;stroke:#04121C;}
.brand-text{
  font-size:16px;font-weight:700;color:#0C1B2B;letter-spacing:.2px;white-space:nowrap;
}
.main-nav{display:none;align-items:center;gap:4px;margin-left:8px;}
@media (min-width:1024px){.main-nav{display:flex;}}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:70px;
  padding:0 12px;font-size:14px;font-weight:500;color:#3A4B60;
  transition:color .2s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:16px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#2DD4BF,#38CFFF);
  transform:scaleX(0);transform-origin:left;transition:transform .24s ease-out;
  box-shadow:0 0 12px rgba(56,207,255,.8);
}
.nav-link:hover{color:#0B93C6;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:#0B93C6;font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-right{display:none;align-items:center;gap:12px;margin-left:auto;}
@media (min-width:1024px){.nav-right{display:flex;}}
.search-box{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;border-radius:999px;
  background:#FFFFFF;border:1px solid rgba(11,27,43,.10);
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.search-box:focus-within{border-color:#7FDCF9;box-shadow:0 0 0 4px rgba(56,207,255,.14);}
.search-box svg{width:16px;height:16px;stroke:#7A8AA0;flex:none;}
.search-box input{
  border:0;background:transparent;outline:none;width:132px;font-size:14px;color:#1B2C3F;
}
.search-box input::placeholder{color:#93A3B6;}
.menu-toggle{
  margin-left:auto;width:44px;height:44px;border-radius:12px;
  background:#FFFFFF;border:1px solid rgba(11,27,43,.10);
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
@media (min-width:1024px){.menu-toggle{display:none;}}
.menu-toggle svg{width:20px;height:20px;stroke:#1B2C3F;}
.drawer{
  position:fixed;inset:0 0 0 auto;width:82%;max-width:340px;z-index:60;
  background:linear-gradient(160deg,rgba(9,18,32,.98),rgba(4,7,13,.99));
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s ease-out;
  padding:24px 20px;display:flex;flex-direction:column;gap:6px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink-1);}
.drawer-close{
  width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.drawer-close svg{width:18px;height:18px;stroke:var(--ink-1);}
.drawer a.drawer-link{
  display:block;padding:13px 12px;border-radius:var(--r-md);
  font-size:16px;color:var(--ink-2);border:1px solid transparent;
}
.drawer a.drawer-link:hover,.drawer a.drawer-link.active{
  color:var(--ink-1);background:rgba(56,207,255,.10);border-color:rgba(56,207,255,.28);
}
.drawer-cta{margin-top:auto;}
.scrim{
  position:fixed;inset:0;background:rgba(2,6,12,.6);z-index:55;
  opacity:0;pointer-events:none;transition:opacity .3s ease-out;
}
.scrim.open{opacity:1;pointer-events:auto;}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .22s ease-out, box-shadow .22s ease-out, background .22s ease-out, border-color .22s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#2DD4BF,#38CFFF);color:#04121C;
  box-shadow:0 0 0 1px rgba(56,207,255,.35),0 12px 40px -12px rgba(56,207,255,.55);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.5),0 16px 46px -12px rgba(56,207,255,.7);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:rgba(255,255,255,.03);border-color:var(--line);color:var(--ink-1);
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(56,207,255,.4);}
.btn-accent{
  background:linear-gradient(135deg,#FFC97A,#FFB454);color:#241503;
  box-shadow:0 0 0 1px rgba(255,180,84,.35),0 12px 40px -14px rgba(255,180,84,.6);
}
.btn-accent:hover{transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-500);
}
.link-arrow svg{width:14px;height:14px;stroke:currentColor;transition:transform .22s ease-out;}
.link-arrow:hover svg{transform:translateX(3px);}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(56,207,255,.16), transparent 62%),
    radial-gradient(760px 400px at 92% 8%, rgba(45,212,191,.13), transparent 60%),
    var(--bg-base);
  padding:56px 0 48px;
}
@media (min-width:1024px){.hero{padding:76px 0 64px;}}
.hero-grid{display:grid;gap:36px;align-items:center;}
@media (min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;}}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;
  color:#9FE9FF;background:rgba(56,207,255,.12);border:1px solid rgba(56,207,255,.3);
}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--brand-2);display:block;box-shadow:0 0 10px var(--brand-2);}
.hero h1{
  margin-top:18px;
  font-size:clamp(30px,4.6vw,52px);
  font-weight:700;line-height:1.24;letter-spacing:-.01em;
}
.hero h1 span{
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  margin-top:18px;max-width:560px;font-size:17px;line-height:1.85;color:var(--ink-2);
}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px;}
.trust-row{
  margin-top:36px;padding-top:24px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 16px;
}
@media (min-width:640px){.trust-row{grid-template-columns:repeat(4,minmax(0,1fr));}}
.trust-item strong{
  display:block;font-size:22px;font-weight:700;color:var(--ink-1);
}
.trust-item span{font-size:13px;color:var(--ink-3);}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);
  box-shadow:0 30px 80px -40px rgba(0,0,0,.95);
}
.hero-visual::after{
  content:"";position:absolute;inset:auto 24px -1px 24px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.8),transparent);
}
.hero-divider{
  margin-top:44px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.55),rgba(45,212,191,.35),transparent);
}

/* ===== Section headings ===== */
.sec-head{max-width:720px;margin-bottom:34px;}
.sec-eyebrow{
  font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:#7FDCF9;
}
.sec-head h2{
  margin-top:10px;font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.32;
}
.sec-head p{margin-top:12px;font-size:15px;color:var(--ink-2);}

/* ===== Glass card ===== */
.glass{
  position:relative;
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  transition:transform .25s ease-out, border-color .25s ease-out, box-shadow .25s ease-out;
}
.glass::before{
  content:"";position:absolute;left:16px;right:16px;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.7),transparent);
  opacity:0;transition:opacity .25s ease-out;
}
.glass:hover{transform:translateY(-4px);border-color:rgba(56,207,255,.4);box-shadow:0 18px 50px -20px rgba(0,0,0,.7);}
.glass:hover::before{opacity:1;}

/* ===== Metric board ===== */
.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
@media (min-width:1024px){.metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}}
.metric-card{padding:22px 20px;}
.metric-card .k{
  font-size:12px;color:var(--ink-3);letter-spacing:.08em;
}
.metric-card .v{
  margin-top:6px;font-size:clamp(28px,3.4vw,40px);font-weight:700;line-height:1.1;
  background:linear-gradient(135deg,#EAF2FF,#7FDCF9);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-card .d{margin-top:10px;font-size:13px;color:var(--ink-2);}

/* ===== Service matrix ===== */
.svc-card{padding:26px 24px;display:flex;flex-direction:column;gap:14px;}
.svc-icon{
  width:44px;height:44px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(56,207,255,.22),rgba(45,212,191,.16));
  border:1px solid rgba(56,207,255,.3);
}
.svc-icon svg{width:20px;height:20px;stroke:#8FE4FA;}
.svc-card h3{font-size:19px;font-weight:600;}
.svc-card p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.svc-card .svc-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.tag{
  display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:600;
}
.tag-cyan{color:#9FE9FF;background:rgba(56,207,255,.12);}
.tag-teal{color:#96F2E2;background:rgba(45,212,191,.12);}
.tag-amber{color:#FFD79A;background:rgba(255,180,84,.14);}
.svc-card.wide{background:linear-gradient(160deg,rgba(56,207,255,.10),rgba(255,255,255,.02));}

/* ===== Compare ===== */
.compare-wrap{
  display:grid;gap:0;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.04),rgba(255,255,255,.015));
}
@media (min-width:1024px){.compare-wrap{grid-template-columns:1fr 1fr;}}
.compare-col{padding:30px 26px;}
.compare-col + .compare-col{border-top:1px solid var(--line);}
@media (min-width:1024px){
  .compare-col + .compare-col{border-top:0;border-left:1px solid var(--line);}
}
.compare-col h3{font-size:18px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.compare-col h3 em{
  width:22px;height:22px;border-radius:50%;font-style:normal;font-size:12px;
  display:flex;align-items:center;justify-content:center;font-weight:700;
}
.compare-muted{background:rgba(110,129,155,.06);}
.compare-muted h3 em{background:rgba(110,129,155,.25);color:#C6D2E2;}
.compare-muted li{color:var(--ink-3);}
.compare-lit{background:linear-gradient(160deg,rgba(56,207,255,.10),rgba(45,212,191,.04));}
.compare-lit h3 em{background:linear-gradient(135deg,#2DD4BF,#38CFFF);color:#04121C;}
.compare-col li{
  display:flex;gap:10px;font-size:14.5px;line-height:1.8;padding:8px 0;color:var(--ink-2);
}
.compare-col li svg{width:16px;height:16px;flex:none;margin-top:6px;stroke:currentColor;}
.compare-conclusion{
  margin-top:20px;padding:18px 22px;border-radius:var(--r-md);
  border:1px solid rgba(255,180,84,.28);background:rgba(255,180,84,.08);
  font-size:14.5px;color:#FFE2B8;
}

/* ===== News / CMS list ===== */
.news-grid{display:grid;gap:22px;grid-template-columns:1fr;}
@media (min-width:640px){.news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.news-card{overflow:hidden;display:flex;flex-direction:column;}
.news-thumb{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,rgba(56,207,255,.18),rgba(45,212,191,.10));
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-badge{
  position:absolute;left:12px;top:12px;padding:3px 10px;border-radius:999px;
  font-size:12px;font-weight:600;color:#04121C;
  background:linear-gradient(135deg,#2DD4BF,#38CFFF);
}
.news-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-body h3{
  font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a:hover{color:var(--brand-500);}
.news-body p{
  font-size:14px;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.empty-state{
  border:1px dashed rgba(140,190,255,.3);border-radius:var(--r-lg);
  padding:48px 24px;text-align:center;color:var(--ink-2);
  background:rgba(255,255,255,.02);
  grid-column:1 / -1;
}
.empty-state svg{width:36px;height:36px;stroke:var(--brand-500);margin:0 auto 14px;}
.empty-state p{font-size:15px;margin-bottom:16px;}

/* ===== FAQ ===== */
.faq-list{display:grid;gap:14px;}
.faq-item{overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-1);
}
.faq-q .mark{
  position:relative;width:22px;height:22px;flex:none;border-radius:50%;
  border:1px solid rgba(56,207,255,.4);
}
.faq-q .mark::before,
.faq-q .mark::after{
  content:"";position:absolute;left:50%;top:50%;background:#8FE4FA;transform:translate(-50%,-50%);
  transition:transform .25s ease-out, opacity .25s ease-out;
}
.faq-q .mark::before{width:10px;height:1.5px;}
.faq-q .mark::after{width:1.5px;height:10px;}
.faq-item.open .mark::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease-out;
  position:relative;
}
.faq-a-inner{padding:0 22px 20px 22px;font-size:14.5px;color:var(--ink-2);}
.faq-item.open .faq-a{max-height:340px;}
.faq-item.open{position:relative;}
.faq-item.open::after{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,#2DD4BF,#38CFFF);
  box-shadow:0 0 12px rgba(56,207,255,.8);
}

/* ===== Form ===== */
.form-grid{display:grid;gap:0;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);}
@media (min-width:1024px){.form-grid{grid-template-columns:.9fr 1.1fr;}}
.form-side{
  padding:34px 28px;
  background:linear-gradient(160deg,rgba(56,207,255,.12),rgba(45,212,191,.05));
}
.form-side h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;}
.form-side p{margin-top:14px;font-size:14.5px;color:var(--ink-2);}
.form-side ul{margin-top:22px;display:grid;gap:10px;}
.form-side li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);}
.form-side li svg{width:16px;height:16px;flex:none;margin-top:6px;stroke:#7FDCF9;}
.form-main{
  padding:34px 28px;background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;color:var(--ink-3);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-md);
  background:rgba(255,255,255,.04);border:1px solid transparent;
  color:var(--ink-1);font-size:15px;outline:none;
  transition:border-color .2s ease-out, box-shadow .2s ease-out;
}
.field textarea{min-height:104px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(56,207,255,.16),0 0 22px -8px rgba(56,207,255,.75);
}
.field select option{background:#0B1524;color:var(--ink-1);}
.field-row{display:grid;gap:18px;}
@media (min-width:640px){.field-row{grid-template-columns:1fr 1fr;}}
.form-note{margin-top:12px;font-size:13px;color:var(--ink-3);}

/* ===== Footer ===== */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 26px;}
.footer-grid{display:grid;gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:var(--ink-1);font-size:16px;}
.site-footer p.f-desc{font-size:14px;color:var(--ink-3);max-width:340px;}
.f-title{
  font-size:13px;font-weight:700;letter-spacing:.14em;color:#8FA3BC;
  text-transform:uppercase;margin-bottom:16px;
}
.f-list{display:grid;gap:10px;}
.f-list a,.f-list span{font-size:14px;color:var(--ink-2);transition:color .2s ease-out,transform .2s ease-out;display:inline-block;}
.f-list a:hover{color:var(--brand-500);transform:translateX(-2px);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(140,190,255,.1);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}

/* roulang page: article */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --ink-body:#C6D6EA;
  --brand-500:#38CFFF;
  --brand-600:#1FB6EA;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --shadow-card:0 18px 50px -20px rgba(0,0,0,.7);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-1);
  background:
    radial-gradient(900px 480px at 10% -10%, rgba(56,207,255,.14), transparent 62%),
    radial-gradient(760px 420px at 94% 2%, rgba(45,212,191,.10), transparent 64%),
    var(--bg-base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media (min-width:1024px){.container{padding:0 24px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:#F7FAFF;
  border-bottom:1px solid rgba(11,27,43,.08);
  transition:box-shadow .25s ease-out;
}
.site-header.is-scrolled{box-shadow:0 12px 32px -20px rgba(6,20,38,.55)}
.header-inner{
  max-width:1200px;margin:0 auto;padding:0 16px;
  height:68px;display:flex;align-items:center;gap:22px;
}
@media (min-width:1024px){.header-inner{padding:0 24px}}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  box-shadow:0 8px 20px -10px rgba(56,207,255,.9);
}
.brand-mark svg{width:18px;height:18px;fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.brand-text{font-size:16px;font-weight:700;color:#0B1B2B;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{
  position:relative;padding:9px 12px;font-size:14px;font-weight:500;color:#42566E;
  border-radius:8px;transition:color .2s ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#38CFFF,#2DD4BF);
  opacity:0;transform:scaleX(.4);transition:opacity .25s ease-out,transform .25s ease-out;
}
.nav-link:hover{color:#1FB6EA}
.nav-link:hover::after{opacity:.85;transform:scaleX(1)}
.nav-link.active{color:#0B1B2B;font-weight:600}
.nav-link.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 10px rgba(56,207,255,.85)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;
  border-radius:var(--r-pill);
  background:rgba(11,27,43,.04);
  border:1px solid rgba(11,27,43,.08);
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(56,207,255,.75);box-shadow:0 0 0 3px rgba(56,207,255,.16);background:#fff}
.search-box svg{width:16px;height:16px;fill:none;stroke:#6E819B;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
.search-box input{border:0;background:transparent;outline:none;width:148px;font-size:14px;color:#0B1B2B}
.search-box input::placeholder{color:#8A9AB0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;cursor:pointer;border:0;
  transition:transform .2s ease-out,box-shadow .25s ease-out,background .2s;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px}
.btn-primary{
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  color:#04121C;
  box-shadow:0 0 0 1px rgba(56,207,255,.35),0 12px 40px -12px rgba(56,207,255,.55);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.55),0 16px 44px -12px rgba(56,207,255,.8)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink-1)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.nav-toggle{
  display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(11,27,43,.12);border-radius:12px;background:rgba(11,27,43,.03);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:#25384E;transition:.25s}
@media (max-width:980px){
  .main-nav,.search-box{display:none}
  .nav-toggle{display:flex}
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:60;
  padding:26px 20px;display:flex;flex-direction:column;gap:6px;
  background:rgba(6,11,20,.95);
  backdrop-filter:blur(16px) saturate(1.2);
  border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .3s ease-out;
}
.drawer.is-open{transform:translateX(0)}
.drawer-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--ink-3);margin-bottom:10px}
.drawer-link{
  padding:14px 14px;border-radius:12px;font-size:16px;color:var(--ink-1);
  border:1px solid transparent;transition:.2s;
}
.drawer-link:hover{background:rgba(255,255,255,.06);border-color:var(--line)}
.drawer .btn{margin-top:18px;width:100%}

/* ---------- Main ---------- */
.site-main{padding:28px 0 64px}
@media (min-width:1024px){.site-main{padding:36px 0 88px}}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px;max-width:100%}
.breadcrumb li+li::before{
  content:"";width:6px;height:6px;flex:none;
  border-top:1.5px solid rgba(140,190,255,.5);
  border-right:1.5px solid rgba(140,190,255,.5);
  transform:rotate(45deg);
}
.breadcrumb a{color:var(--ink-3);transition:color .2s}
.breadcrumb a:hover{color:var(--brand-500)}
.breadcrumb li[aria-current] span{color:var(--ink-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:46vw}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;margin-top:22px}
@media (min-width:1080px){.article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:44px}}
.article-head{padding-bottom:22px;border-bottom:1px solid var(--line)}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;color:#38CFFF;
  background:rgba(56,207,255,.12);border:1px solid rgba(56,207,255,.24);
}
.article-head h1{
  margin-top:16px;
  font-size:clamp(30px,4.6vw,44px);
  font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--ink-1);
}
.article-meta{margin-top:16px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-3)}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(140,190,255,.4)}
.article-body{max-width:760px;margin-top:28px;font-size:16.5px;line-height:1.85}
.article-body p{margin:0 0 1.1em;color:var(--ink-body)}
.article-body h2{
  position:relative;margin:2.2em 0 .9em;padding-left:16px;
  font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.42;color:var(--ink-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,#38CFFF,#2DD4BF);
  box-shadow:0 0 12px rgba(56,207,255,.7);
}
.article-body h3{margin:1.6em 0 .6em;font-size:19px;font-weight:600;line-height:1.5;color:var(--ink-1)}
.article-body h4{margin:1.3em 0 .5em;font-size:16.5px;font-weight:600;color:var(--ink-1)}
.article-body a{color:var(--brand-500);transition:color .2s}
.article-body a:hover{text-decoration:underline}
.article-body strong{color:var(--ink-1);font-weight:600}
.article-body ul{margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:.5em;color:var(--ink-body)}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.82em;width:6px;height:6px;border-radius:50%;
  background:rgba(56,207,255,.75);
}
.article-body ol{counter-reset:ol;margin:0 0 1.2em}
.article-body ol li{counter-increment:ol;position:relative;padding-left:32px;margin-bottom:.55em;color:var(--ink-body)}
.article-body ol li::before{
  content:counter(ol);position:absolute;left:0;top:.34em;width:20px;height:20px;border-radius:6px;
  display:grid;place-items:center;
  background:rgba(56,207,255,.12);color:#38CFFF;font-size:12px;font-weight:600;
}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;border-radius:var(--r-md);
  border-left:2px solid var(--accent);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  color:#D6E3F5;
}
.article-body img{border-radius:var(--r-md);border:1px solid var(--line);margin:1.4em 0}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:10px;font-size:13px;color:var(--ink-3);text-align:center}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  margin:1.5em 0;font-size:14.5px;line-height:1.7;
}
.article-body thead{background:rgba(56,207,255,.10)}
.article-body th{
  text-align:left;padding:12px 14px;border:1px solid var(--line);
  color:var(--ink-1);font-weight:600;white-space:nowrap;
}
.article-body td{padding:11px 14px;border:1px solid var(--line);color:var(--ink-body)}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.article-body code{
  padding:2px 6px;border-radius:6px;font-size:14px;
  background:rgba(56,207,255,.10);color:#8FE4FF;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.empty-state{
  max-width:760px;margin-top:28px;padding:52px 24px;text-align:center;
  border:1px dashed rgba(140,190,255,.28);border-radius:var(--r-lg);
  background:rgba(255,255,255,.03);
}
.empty-state p{color:var(--ink-2);margin-bottom:20px}
.article-actions{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:40px;padding-top:28px;
  border-top:1px solid var(--line);
}
.article-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1080px){.article-side{position:sticky;top:96px;align-self:start}}
.side-card{
  padding:22px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(1.2);
}
.side-title{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink-3);margin-bottom:14px}
.side-list{display:flex;flex-direction:column;gap:4px}
.side-list a{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;
  font-size:14px;color:var(--ink-2);transition:.2s ease-out;
}
.side-list a::before{
  content:"";width:6px;height:6px;flex:none;border-radius:2px;
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
}
.side-list a:hover{background:rgba(255,255,255,.06);color:var(--ink-1);transform:translateX(2px)}
.side-note{font-size:13.5px;color:var(--ink-3);line-height:1.8}
.related{margin-top:64px;padding-top:36px;border-top:1px solid var(--line)}
.section-title{font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink-1);margin-bottom:20px}
.related-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  transition:transform .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.card:hover{transform:translateY(-4px);border-color:rgba(56,207,255,.4);box-shadow:var(--shadow-card)}
.card-thumb{aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.04)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5;color:var(--ink-1)}
.card-body p{font-size:14px;line-height:1.75;color:var(--ink-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-link{margin-top:auto;padding-top:10px;font-size:13.5px;font-weight:600;color:var(--brand-500);display:inline-flex;align-items:center;gap:6px}
.card-link svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s}
.card:hover .card-link svg{transform:translateX(3px)}

/* ---------- Footer ---------- */
.site-footer{margin-top:32px;background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-mark{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:linear-gradient(135deg,#38CFFF,#2DD4BF)}
.footer-brand .brand-mark svg{width:18px;height:18px;fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.footer-brand .brand-text{font-size:16px;font-weight:700;color:var(--ink-1)}
.f-desc{margin-top:14px;font-size:14px;line-height:1.85;color:var(--ink-3);max-width:330px}
.f-title{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--ink-1);margin-bottom:16px}
.f-list{display:flex;flex-direction:column;gap:10px}
.f-list a,.f-list span{font-size:14px;color:var(--ink-3);transition:color .2s ease-out,transform .2s ease-out}
.f-list a:hover{color:var(--brand-500);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}

/* roulang page: category1 */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --brand-500:#38CFFF;
  --brand-600:#1FB6E8;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --topbar:#F7FAFF;
  --topbar-ink:#0B1B2B;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:18px;
  --radius-xl:24px;
  --shadow-card:0 18px 50px -20px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(56,207,255,.35),0 12px 40px -12px rgba(56,207,255,.55);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--ink-1);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media(min-width:1024px){.container{padding:0 24px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--topbar);
  border-bottom:1px solid rgba(11,27,43,.08);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 34px -22px rgba(11,27,43,.55)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--topbar-ink);font-weight:700;font-size:16px;white-space:nowrap}
.brand-mark{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;flex:0 0 auto;
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  box-shadow:0 8px 20px -10px rgba(56,207,255,.9);
}
.brand-mark svg{width:16px;height:16px;stroke:#04121F;fill:none}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:10px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:14px;font-weight:500;color:#3E5A76;border-radius:var(--radius-s);
  transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#38CFFF,#2DD4BF);opacity:0;transition:opacity .2s ease;
  box-shadow:0 0 10px rgba(56,207,255,.8);
}
.nav-link:hover{color:#0F7FA8}
.nav-link:hover::after,.nav-link.active::after{opacity:1}
.nav-link.active{color:var(--topbar-ink);font-weight:600}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;min-width:186px;
  border-radius:999px;background:#fff;border:1px solid rgba(11,27,43,.1);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box svg{width:16px;height:16px;stroke:#6E819B;fill:none;flex:0 0 auto}
.search-box input{border:0;background:transparent;outline:none;font-size:14px;width:100%;color:var(--topbar-ink)}
.search-box input::placeholder{color:#8FA3B8}
.search-box:focus-within{border-color:rgba(56,207,255,.75);box-shadow:0 0 0 3px rgba(56,207,255,.18)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;
  background:rgba(11,27,43,.05);border:1px solid rgba(11,27,43,.12);cursor:pointer;
}
.nav-toggle svg{width:20px;height:20px;stroke:var(--topbar-ink);fill:none}
@media(max-width:1100px){
  .search-box{display:none}
}
@media(max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
}
.drawer-overlay{
  position:fixed;inset:0;background:rgba(4,7,13,.6);opacity:0;pointer-events:none;
  transition:opacity .25s ease;z-index:55;
}
.drawer-overlay.show{opacity:1;pointer-events:auto}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(330px,86vw);z-index:60;
  background:rgba(6,11,20,.97);backdrop-filter:blur(14px) saturate(1.2);
  border-left:1px solid var(--line);padding:26px 22px;
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;gap:4px;
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer .d-title{font-size:13px;letter-spacing:.1em;color:var(--ink-3);margin-bottom:12px}
.mobile-drawer a.m-link{
  display:block;padding:12px 14px;border-radius:12px;font-size:16px;color:var(--ink-2);
  border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.mobile-drawer a.m-link:hover,.mobile-drawer a.m-link.active{
  background:rgba(56,207,255,.1);color:var(--ink-1);border-color:rgba(56,207,255,.3);
}
.mobile-drawer .btn{margin-top:18px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .25s ease,border-color .25s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);color:#04121F;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.5),0 18px 46px -14px rgba(56,207,255,.7)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--ink-1)}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(56,207,255,.4)}
.btn-accent{
  background:linear-gradient(135deg,#FFB454,#FF9A3C);color:#1C1206;
  box-shadow:0 0 0 1px rgba(255,180,84,.35),0 12px 40px -14px rgba(255,180,84,.6);
}
.btn-accent:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,180,84,.5),0 18px 44px -16px rgba(255,180,84,.75)}
.btn-sm{min-height:38px;padding:0 18px;font-size:13px}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-500);
}
.link-arrow svg{width:14px;height:14px;stroke:currentColor;fill:none;transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- Badges / chips ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge-cyan{background:rgba(56,207,255,.12);color:#7EDCFF}
.badge-teal{background:rgba(45,212,191,.12);color:#7CE7D8}
.badge-amber{background:rgba(255,180,84,.12);color:#FFCF92}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  font-size:13px;color:var(--ink-2);transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.chip:hover{border-color:rgba(56,207,255,.45);color:var(--ink-1);background:rgba(56,207,255,.08)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:60px 0 54px;
  background:
    radial-gradient(900px 420px at 12% -12%,rgba(56,207,255,.16),transparent 62%),
    radial-gradient(720px 380px at 92% 0%,rgba(45,212,191,.13),transparent 64%),
    var(--bg-base);
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.55),rgba(45,212,191,.3),transparent);
}
.hero-title{
  font-size:clamp(30px,4.6vw,48px);font-weight:700;line-height:1.24;letter-spacing:-.01em;
}
.hero-sub{font-size:clamp(16px,1.6vw,19px);color:var(--ink-2);line-height:1.8;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
@media(min-width:768px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat{
  border-radius:var(--radius-m);border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  padding:14px 16px;
}
.stat-num{
  display:block;font-size:24px;font-weight:700;font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-label{display:block;font-size:12px;color:var(--ink-3);margin-top:2px}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-l);
  border:1px solid var(--line);box-shadow:0 28px 70px -34px rgba(0,0,0,.95);
}

/* ---------- Sections ---------- */
.section{padding:60px 0}
@media(min-width:1024px){.section{padding:92px 0}}
.section-head{max-width:720px;margin-bottom:36px}
.eyebrow{font-size:13px;letter-spacing:.08em;color:var(--brand-500);font-weight:600}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.32;margin-top:10px}
.section-sub{color:var(--ink-2);margin-top:12px;font-size:15px}

.glass{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);backdrop-filter:blur(14px) saturate(1.2);
  padding:24px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.glass::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.7),transparent);
  opacity:0;transition:opacity .25s ease;
}
.glass:hover{transform:translateY(-4px);border-color:rgba(56,207,255,.4);box-shadow:var(--shadow-card)}
.glass:hover::before{opacity:1}
.card-title{font-size:19px;font-weight:600;margin-top:14px}
.card-text{color:var(--ink-2);font-size:15px;margin-top:10px}
.icon-box{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(56,207,255,.18),rgba(45,212,191,.08));
  border:1px solid rgba(140,190,255,.28);
}
.icon-box svg{width:22px;height:22px;stroke:var(--brand-500);fill:none;stroke-width:1.8}

/* ---------- Timeline ---------- */
.timeline{position:relative;padding-left:64px}
.timeline::before{
  content:"";position:absolute;left:23px;top:14px;bottom:14px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,rgba(56,207,255,.75),rgba(45,212,191,.28),rgba(45,212,191,0));
}
.tl-item{position:relative;margin-bottom:22px}
.tl-item:last-child{margin-bottom:0}
.tl-dot{
  position:absolute;left:-64px;top:6px;width:48px;height:48px;border-radius:16px;
  display:grid;place-items:center;font-weight:700;font-size:17px;font-variant-numeric:tabular-nums;
  color:var(--brand-500);
  background:linear-gradient(160deg,rgba(56,207,255,.22),rgba(45,212,191,.1));
  border:1px solid rgba(140,190,255,.34);
  box-shadow:0 0 0 6px rgba(6,11,20,.92),0 12px 30px -16px rgba(56,207,255,.7);
}
.tl-step{font-size:12px;color:var(--ink-3);letter-spacing:.06em}
@media(max-width:640px){
  .timeline{padding-left:52px}
  .timeline::before{left:18px}
  .tl-dot{left:-52px;width:38px;height:38px;border-radius:12px;font-size:15px;top:8px}
}

/* ---------- Lists ---------- */
.check-list li{position:relative;padding-left:30px;margin-bottom:12px;color:var(--ink-2);font-size:15px}
.check-list li:last-child{margin-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;width:17px;height:17px;border-radius:50%;
  background:rgba(56,207,255,.14);border:1px solid rgba(56,207,255,.5);
}
.check-list li::after{
  content:"";position:absolute;left:6px;top:14px;width:6px;height:6px;border-radius:50%;
  background:var(--brand-2);box-shadow:0 0 8px rgba(45,212,191,.9);
}

/* ---------- Issue cards ---------- */
.issue{
  position:relative;padding-left:20px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(255,255,255,.035);padding:20px 20px 20px 22px;
  transition:border-color .2s ease,transform .2s ease;
}
.issue::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,#FFB454,rgba(255,180,84,.15));
}
.issue:hover{border-color:rgba(255,180,84,.4);transform:translateY(-3px)}
.issue h3{font-size:17px;font-weight:600}
.issue p{color:var(--ink-2);font-size:14.5px;margin-top:8px}

/* ---------- FAQ ---------- */
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);overflow:hidden;margin-bottom:12px;
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item.open{border-color:rgba(56,207,255,.45);box-shadow:inset 2px 0 0 var(--brand-500),0 14px 40px -26px rgba(56,207,255,.8)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--ink-1);
}
.faq-q .mark{
  flex:0 0 auto;width:22px;height:22px;position:relative;border-radius:50%;
  border:1px solid rgba(140,190,255,.4);transition:transform .25s ease,border-color .25s ease;
}
.faq-q .mark::before,.faq-q .mark::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-500);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .mark::before{width:10px;height:2px}
.faq-q .mark::after{width:2px;height:10px;transition:opacity .25s ease}
.faq-item.open .faq-q .mark{transform:rotate(180deg);border-color:rgba(56,207,255,.7)}
.faq-item.open .faq-q .mark::after{opacity:0}
.faq-a{display:none;padding:0 20px 20px;color:var(--ink-2);font-size:15px}
.faq-item.open .faq-a{display:block}

/* ---------- CTA / form ---------- */
.cta-band{
  position:relative;border-radius:var(--radius-xl);overflow:hidden;
  border:1px solid var(--line);
  background-image:linear-gradient(135deg,rgba(6,11,20,.94),rgba(6,11,20,.82)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:36px 24px;
}
@media(min-width:1024px){.cta-band{padding:56px 48px}}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--ink-2);font-weight:500;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;background:rgba(255,255,255,.04);border:1px solid transparent;border-radius:12px;
  padding:12px 14px;font-size:15px;color:var(--ink-1);outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#5C7characters}
.field input::placeholder,.field textarea::placeholder{color:#5C7A96}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(56,207,255,.16);background:rgba(255,255,255,.06);
}
.field select option{background:#0B1220;color:#EAF2FF}
.form-tip{font-size:13px;color:var(--brand-2);margin-top:12px;min-height:20px}
.form-note{font-size:13px;color:var(--ink-3);margin-top:10px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 24px;color:var(--ink-2)}
.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
@media(max-width:639px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--ink-1);font-weight:700;font-size:16px;margin-bottom:14px}
.f-desc{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:340px}
.f-title{font-size:13px;letter-spacing:.08em;color:var(--ink-3);font-weight:600;margin-bottom:14px}
.f-list a,.f-list span{display:block;font-size:14px;color:var(--ink-2);padding:5px 0;transition:color .2s ease,transform .2s ease}
.f-list a:hover{color:var(--ink-1);transform:translateX(-2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}

/* roulang page: category2 */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --panel-2:rgba(255,255,255,.02);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --brand-500:#38CFFF;
  --brand-600:#1FB6E8;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --r-s:10px;
  --r-m:14px;
  --r-l:18px;
  --r-p:999px;
  --glow:0 0 0 1px rgba(56,207,255,.35), 0 12px 40px -12px rgba(56,207,255,.55);
  --shadow-card:0 18px 50px -20px rgba(0,0,0,.7);
  --light-bar:#F7FAFF;
  --light-line:rgba(11,27,43,.08);
  --light-ink:#0B1B2B;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
.site-body{
  margin:0;
  padding:0;
  background:var(--bg-base);
  color:var(--ink-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.site-body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(680px 380px at 12% 4%, rgba(56,207,255,.13), transparent 62%),
    radial-gradient(620px 420px at 88% 22%, rgba(45,212,191,.10), transparent 66%),
    radial-gradient(700px 500px at 50% 100%, rgba(56,207,255,.06), transparent 70%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;color:inherit}
input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;line-height:1.3}
body .container{width:100%;max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:1024px){body .container{padding-left:24px;padding-right:24px}}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}

/* ============ 顶部浅色平台栏 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--light-bar);
  border-bottom:1px solid var(--light-line);
  transition:box-shadow .25s ease-out;
}
.site-header.is-scrolled{box-shadow:0 12px 32px -22px rgba(11,27,43,.55)}
.header-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 16px;
  height:68px;
  display:flex;
  align-items:center;
  gap:22px;
}
@media (min-width:1024px){.header-inner{padding:0 24px}}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-2));
  box-shadow:0 8px 20px -10px rgba(56,207,255,.85);
  flex-shrink:0;
}
.brand-mark svg{width:16px;height:16px;fill:none;stroke:#04121F;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.brand-text{font-size:16px;font-weight:700;color:var(--light-ink);white-space:nowrap}
.main-nav{display:none}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:22px;margin:0 auto}
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 2px;
  font-size:14px;
  font-weight:500;
  color:#42566E;
  transition:color .2s ease-out;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:2px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--brand-2));
  box-shadow:0 0 10px rgba(56,207,255,.75);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease-out;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:#06121F;font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{display:none}
@media (min-width:768px){
  .search-box{
    display:flex;align-items:center;gap:8px;
    height:38px;padding:0 14px;
    border-radius:var(--r-p);
    background:#fff;
    border:1px solid var(--light-line);
    box-shadow:0 1px 2px rgba(11,27,43,.04);
  }
}
.search-box svg{width:16px;height:16px;fill:none;stroke:#8FA3B8;stroke-width:2;flex-shrink:0}
.search-box input{border:0;outline:0;background:transparent;width:150px;font-size:14px;color:#0B1B2B}
.search-box input::placeholder{color:#9AAEC2}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--light-line);
  background:#fff;color:#0B1B2B;
  transition:background-color .2s ease-out,transform .2s ease-out;
}
.menu-toggle:hover{background:#EEF5FF;transform:translateY(-1px)}
.menu-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
@media (min-width:1024px){.menu-toggle{display:none}}
@media (max-width:520px){
  .header-inner{height:62px;gap:10px}
  .brand-text{font-size:13.5px}
}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--r-p);
  font-size:14px;font-weight:600;
  border:1px solid transparent;
  white-space:nowrap;
  transition:transform .2s ease-out,box-shadow .25s ease-out,background-color .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:linear-gradient(135deg,var(--brand-500),var(--brand-2));color:#04121F;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.45),0 16px 44px -12px rgba(56,207,255,.72)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-1)}
.btn-ghost:hover{background:rgba(255,255,255,.08);transform:translateY(-1px)}
.btn-accent{background:linear-gradient(135deg,#FFCB85,var(--accent));color:#2A1A02;box-shadow:0 0 0 1px rgba(255,180,84,.35),0 12px 36px -14px rgba(255,180,84,.62)}
.btn-accent:hover{transform:translateY(-1px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13.5px}
.site-header .btn-ghost{color:#0B1B2B;border-color:rgba(11,27,43,.14)}
.site-header .btn-ghost:hover{background:rgba(11,27,43,.05)}
.btn-block{width:100%}

/* ============ 移动端抽屉 ============ */
.drawer{position:fixed;inset:0;z-index:60;display:none}
.drawer.open{display:block}
.drawer-backdrop{position:absolute;inset:0;background:rgba(4,7,13,.62);backdrop-filter:blur(3px)}
.drawer-panel{
  position:absolute;top:0;right:0;
  height:100%;width:min(320px,88vw);
  padding:20px;
  display:flex;flex-direction:column;gap:6px;
  background:linear-gradient(160deg,rgba(12,20,34,.99),rgba(6,11,20,.99));
  border-left:1px solid var(--line);
  overflow-y:auto;
  transform:translateX(100%);
  transition:transform .28s ease-out;
}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-title{font-size:14px;font-weight:600;color:var(--ink-2)}
.drawer-close{
  width:38px;height:38px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-close svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.drawer-link{
  display:block;padding:12px 14px;border-radius:12px;
  font-size:16px;color:var(--ink-2);
  border:1px solid transparent;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.drawer-link:hover{color:var(--ink-1);background:rgba(255,255,255,.05)}
.drawer-link.active{color:#04121F;background:linear-gradient(135deg,var(--brand-500),var(--brand-2));font-weight:600}
.drawer-cta{margin-top:16px}

/* ============ Hero ============ */
.hero{position:relative;padding:48px 0 40px;overflow:hidden}
@media (min-width:1024px){.hero{padding:64px 0 56px}}
.hero-grid{display:grid;gap:32px;align-items:center}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:48px}
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-p);
  font-size:12px;font-weight:600;
  background:rgba(56,207,255,.12);
  border:1px solid rgba(56,207,255,.28);
  color:#7FE0FF;
}
.badge-teal{background:rgba(45,212,191,.12);border-color:rgba(45,212,191,.28);color:#7CE7D8}
.badge-amber{background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.3);color:#FFC879}
.hero-title{
  margin:18px 0 14px;
  font-size:clamp(28px,4.4vw,44px);
  font-weight:700;
  letter-spacing:-.01em;
  color:#fff;
}
.hero-title em{
  font-style:normal;
  background:linear-gradient(120deg,var(--brand-500),var(--brand-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{max-width:560px;font-size:17px;line-height:1.85;color:var(--ink-2)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-l);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--r-l);
  background:linear-gradient(135deg,rgba(56,207,255,.16),transparent 58%);
  pointer-events:none;
}
.trust-row{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px 24px;
  margin-top:32px;padding-top:24px;
  border-top:1px solid var(--line);
}
@media (min-width:768px){.trust-row{grid-template-columns:repeat(4,minmax(0,1fr))}}
.trust-item strong{
  display:block;
  font-size:22px;font-weight:700;color:#fff;
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.trust-item span{font-size:13px;color:var(--ink-3)}

/* ============ 通用板块 ============ */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:86px 0}}
.section-alt{background:linear-gradient(180deg,rgba(4,7,13,.6),rgba(6,11,20,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:34px}
.eyebrow{
  display:inline-block;
  font-size:12.5px;font-weight:600;
  color:var(--brand-500);
  letter-spacing:.14em;
  margin-bottom:10px;
}
.h2{font-size:clamp(24px,3vw,34px);font-weight:700;color:#fff;margin-bottom:12px}
.lead{font-size:16px;line-height:1.85;color:var(--ink-2)}

/* ============ 标签 chips ============ */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.chip{
  padding:8px 16px;border-radius:var(--r-p);
  font-size:13.5px;color:var(--ink-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:transform .2s ease-out,background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.chip:hover{
  color:#04121F;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-2));
  border-color:transparent;
  transform:translateY(-2px);
}

/* ============ 非对称卡片矩阵 ============ */
.matrix{display:grid;gap:20px;grid-template-columns:minmax(0,1fr)}
@media (min-width:640px){.matrix{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){
  .matrix{grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
  .m-span6{grid-column:span 6}
  .m-span3{grid-column:span 3}
}
.card{
  position:relative;
  padding:26px;
  border-radius:var(--r-l);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  transition:transform .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.card::before{
  content:"";
  position:absolute;left:20px;right:20px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.8),transparent);
  opacity:0;transition:opacity .25s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(56,207,255,.4)}
.card:hover::before{opacity:1}
.card-icon{
  width:44px;height:44px;border-radius:var(--r-m);
  display:flex;align-items:center;justify-content:center;
  background:rgba(56,207,255,.1);
  border:1px solid rgba(56,207,255,.25);
  margin-bottom:16px;
}
.card-icon svg{width:22px;height:22px;fill:none;stroke:#7FE0FF;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card-icon.teal{background:rgba(45,212,191,.1);border-color:rgba(45,212,191,.25)}
.card-icon.teal svg{stroke:#7CE7D8}
.card-icon.amber{background:rgba(255,180,84,.1);border-color:rgba(255,180,84,.26)}
.card-icon.amber svg{stroke:#FFC879}
.card h3{font-size:19px;font-weight:600;color:#fff;margin-bottom:10px}
.card p{font-size:15px;line-height:1.8;color:var(--ink-2)}
.card-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-m);
  border:1px solid var(--line);
  margin-bottom:18px;
}
.card-list{margin-top:14px;display:grid;gap:8px}
.card-list li{position:relative;padding-left:16px;font-size:14px;color:var(--ink-2)}
.card-list li::before{
  content:"";position:absolute;left:0;top:.68em;
  width:6px;height:6px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-2));
}
.more{
  display:inline-flex;align-items:center;gap:6px;
  margin-top:18px;font-size:14px;font-weight:600;
  color:var(--brand-500);
}
.more svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease-out}
.card:hover .more svg{transform:translateX(3px)}
.span-note{font-size:13px;color:var(--ink-3);margin-top:18px}

/* ============ 场景卡 ============ */
.scene-grid{display:grid;gap:22px;grid-template-columns:minmax(0,1fr)}
@media (min-width:640px){.scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.scene-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.scene{
  overflow:hidden;
  border-radius:var(--r-l);
  background:linear-gradient(160deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--line);
  transition:transform .25s ease-out,box-shadow .25s ease-out,border-color .25s ease-out;
}
.scene:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(56,207,255,.38)}
.scene img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:22px}
.scene-body h3{font-size:18px;font-weight:600;color:#fff;margin:12px 0 8px}
.scene-body p{font-size:14.5px;color:var(--ink-2)}

/* ============ 提示条 ============ */
.notice{
  display:flex;gap:14px;align-items:flex-start;
  margin-top:30px;padding:18px 20px;
  border-radius:var(--r-m);
  background:rgba(255,180,84,.07);
  border:1px solid rgba(255,180,84,.24);
}
.notice svg{width:20px;height:20px;flex-shrink:0;margin-top:4px;fill:none;stroke:var(--accent);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.notice p{font-size:14.5px;color:#FFD8A6}

/* ============ FAQ ============ */
.faq{display:grid;gap:12px;max-width:920px}
.faq-item{
  border-radius:var(--r-m);
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.018));
  border:1px solid var(--line);
  overflow:hidden;
  transition:border-color .25s ease-out,background-color .25s ease-out;
}
.faq-item.open{border-color:rgba(56,207,255,.4)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  background:transparent;border:0;
  font-size:16px;font-weight:600;color:#fff;
  text-align:left;
  min-height:44px;
}
.faq-sign{
  width:26px;height:26px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:8px;
  border:1px solid var(--line);
  color:var(--brand-500);
  transition:transform .25s ease-out,border-color .25s ease-out;
}
.faq-sign svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round}
.faq-item.open .faq-sign{transform:rotate(45deg);border-color:rgba(56,207,255,.5)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
.faq-item.open .faq-a{max-height:420px}
.faq-a-inner{
  padding:0 20px 20px 22px;
  margin-left:2px;
  border-left:2px solid transparent;
  font-size:15px;line-height:1.85;color:var(--ink-2);
}
.faq-item.open .faq-a-inner{border-left-color:var(--brand-500);box-shadow:-3px 0 14px -6px rgba(56,207,255,.8)}

/* ============ 表单 ============ */
.form-card{
  display:grid;gap:30px;
  padding:26px;
  border-radius:var(--r-l);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(1.2);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
}
@media (min-width:1024px){.form-card{grid-template-columns:.9fr 1.1fr;gap:44px;padding:38px}}
.form-side h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:#fff;margin-bottom:14px}
.form-side p{font-size:15px;color:var(--ink-2)}
.form-side .card-list{margin-top:20px}
.field{display:grid;gap:8px;margin-bottom:16px}
.field label{font-size:13px;color:var(--ink-3)}
.field input,.field select,.field textarea{
  width:100%;
  padding:12px 14px;
  border-radius:12px;
  background:rgba(255,255,255,.04);
  border:1px solid transparent;
  color:#fff;
  font-size:15px;
  outline:none;
  transition:border-color .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:#5F7governor}
.field input::placeholder,.field textarea::placeholder{color:#617590}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(56,207,255,.16);
  background:rgba(255,255,255,.06);
}
.field select option{background:#0B1626;color:#EAF2FF}
.form-status{margin-top:14px;font-size:13.5px;color:var(--brand-2);min-height:20px}

/* ============ CTA 条 ============ */
.cta-band{
  display:flex;flex-wrap:wrap;gap:20px;
  align-items:center;justify-content:space-between;
  padding:28px 30px;
  border-radius:var(--r-l);
  background:linear-gradient(135deg,rgba(56,207,255,.15),rgba(45,212,191,.07));
  border:1px solid rgba(56,207,255,.3);
  box-shadow:0 22px 60px -34px rgba(56,207,255,.7);
}
.cta-band h2{font-size:clamp(20px,2.4vw,27px);font-weight:700;color:#fff;margin-bottom:8px}
.cta-band p{font-size:15px;color:var(--ink-2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--line);
  padding:56px 0 24px;
  margin-top:20px;
}
.footer-grid{display:grid;gap:32px;grid-template-columns:minmax(0,1fr)}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{width:26px;height:26px;border-radius:8px}
.footer-brand .brand-text{color:#fff;font-size:15.5px}
.f-desc{font-size:14px;line-height:1.8;color:var(--ink-3);max-width:340px}
.f-title{font-size:13px;font-weight:600;color:#fff;letter-spacing:.12em;margin-bottom:16px}
.f-list{display:grid;gap:10px}
.f-list a,.f-list span{font-size:14px;color:var(--ink-2);display:inline-block;transition:color .2s ease-out,transform .2s ease-out}
.f-list a:hover{color:var(--brand-500);transform:translateX(-2px)}
.footer-bottom{
  margin-top:38px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;
  justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --brand-500:#38CFFF;
  --brand-600:#1FA9DC;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --r-s:10px;
  --r-m:14px;
  --r-l:18px;
  --pill:999px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  background:var(--bg-base);
  color:var(--ink-1);
  line-height:1.85;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px}
@media(min-width:1024px){.container{padding:0 24px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#F7FAFF;
  border-bottom:1px solid rgba(11,27,43,.08);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 10px 28px -18px rgba(11,27,43,.4)}
.header-inner{display:flex;align-items:center;gap:16px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  box-shadow:0 0 0 1px rgba(56,207,255,.35),0 10px 26px -12px rgba(56,207,255,.75);
}
.brand-mark svg{width:16px;height:16px;stroke:#04121F;fill:none}
.brand-text{font-size:15px;font-weight:700;color:#0B1B2B;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:none;align-items:center;gap:4px;margin-left:6px}
@media(min-width:1024px){.main-nav{display:flex}}
.nav-link{
  position:relative;padding:9px 11px;font-size:14px;font-weight:500;color:#3B4F66;
  border-radius:8px;transition:color .2s ease,background .2s ease;white-space:nowrap;
}
.nav-link:hover{color:var(--brand-600);background:rgba(56,207,255,.08)}
.nav-link::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#38CFFF,#2DD4BF);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
  box-shadow:0 0 12px rgba(56,207,255,.85);
}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:#0B1B2B;font-weight:600}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
  display:none;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:var(--pill);
  background:#fff;border:1px solid rgba(11,27,43,.12);transition:border-color .2s ease,box-shadow .2s ease;
}
@media(min-width:1120px){.search-box{display:flex;min-width:238px}}
.search-box:focus-within{border-color:rgba(56,207,255,.6);box-shadow:0 0 0 3px rgba(56,207,255,.16)}
.search-box svg{width:16px;height:16px;stroke:#8A9BB0;fill:none;flex-shrink:0}
.search-box input{border:0;background:transparent;outline:none;font-size:13px;width:100%;color:#0B1B2B}
.search-box input::placeholder{color:#8A9BB0}
.menu-toggle{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:12px;border:1px solid rgba(11,27,43,.12);background:#fff;cursor:pointer;
}
.menu-toggle svg{width:20px;height:20px;stroke:#213549;fill:none}
@media(min-width:1024px){.menu-toggle{display:none}}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;
  padding:0 20px;border-radius:var(--pill);font-size:14px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:transform .2s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#38CFFF,#2DD4BF);color:#04121F;
  box-shadow:0 0 0 1px rgba(56,207,255,.35),0 12px 40px -12px rgba(56,207,255,.55);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.5),0 18px 46px -12px rgba(56,207,255,.72)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{
  background:linear-gradient(135deg,#FFB454,#FF9A2E);color:#2A1703;
  box-shadow:0 0 0 1px rgba(255,180,84,.35),0 12px 38px -14px rgba(255,180,84,.6);
}
.btn-accent:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(255,180,84,.5),0 18px 44px -14px rgba(255,180,84,.75)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--ink-1)}
.btn-ghost:hover{background:rgba(255,255,255,.09);transform:translateY(-1px)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px}
.btn-block{width:100%}

/* ---------- Drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(3,7,13,.6);backdrop-filter:blur(2px);z-index:70;opacity:0;pointer-events:none;transition:opacity .25s ease}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84%;max-width:340px;z-index:80;
  background:rgba(8,16,28,.94);backdrop-filter:blur(16px) saturate(1.2);
  border-left:1px solid var(--line);padding:22px 20px;
  transform:translateX(102%);transition:transform .28s ease-out;display:flex;flex-direction:column;gap:18px;
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-head .brand-text{color:var(--ink-1);font-size:15px}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.05);cursor:pointer}
.drawer-close svg{width:18px;height:18px;stroke:var(--ink-1);fill:none;margin:0 auto}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav a{padding:13px 14px;border-radius:var(--r-s);font-size:16px;color:var(--ink-2);border:1px solid transparent}
.drawer-nav a:hover{background:rgba(56,207,255,.08);color:var(--ink-1)}
.drawer-nav a.active{background:rgba(56,207,255,.12);border-color:rgba(56,207,255,.35);color:#EAF9FF;font-weight:600}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--bg-base);padding:52px 0 34px}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.2}
.hero-veil{
  position:absolute;inset:0;
  background:radial-gradient(860px 400px at 12% 0%,rgba(56,207,255,.22),transparent 62%),
             radial-gradient(700px 380px at 92% 10%,rgba(45,212,191,.14),transparent 60%),
             linear-gradient(180deg,rgba(6,11,20,.8),rgba(6,11,20,.97));
}
.hero-inner{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.12fr .88fr;gap:40px}}
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--pill);font-size:12px;font-weight:600;letter-spacing:.02em}
.badge-cyan{background:rgba(56,207,255,.14);color:#8FE2FF}
.badge-teal{background:rgba(45,212,191,.14);color:#7BE6D4}
.badge-amber{background:rgba(255,180,84,.14);color:#FFD39A}
.hero-title{
  font-size:clamp(28px,3.7vw,44px);font-weight:700;line-height:1.28;letter-spacing:-.01em;
  margin:18px 0 14px;color:#F2F8FF;
}
.hero-sub{font-size:clamp(15px,1.6vw,17px);color:var(--ink-2);max-width:620px;margin:0 0 24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-figure{position:relative;border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);box-shadow:0 26px 60px -30px rgba(0,0,0,.9)}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;font-size:13px;color:#DCEBFF;
  background:linear-gradient(180deg,rgba(4,7,13,0),rgba(4,7,13,.88));
}
.hero-strip{display:flex;flex-wrap:wrap;gap:14px 30px;margin-top:26px;padding-top:20px;border-top:1px solid rgba(140,190,255,.16)}
.strip-item{display:flex;align-items:baseline;gap:8px}
.strip-num{font-size:20px;font-weight:700;color:#EAF2FF;font-variant-numeric:tabular-nums}
.strip-label{font-size:13px;color:var(--ink-3)}

/* ---------- Sections ---------- */
.section{padding:54px 0}
@media(min-width:1024px){.section{padding:82px 0}}
.section-head{max-width:760px;margin-bottom:28px}
.section-title{font-size:clamp(22px,2.7vw,32px);font-weight:700;letter-spacing:-.01em;margin:12px 0 10px;color:#F0F6FF}
.section-sub{font-size:15px;color:var(--ink-2);margin:0}
.glass{
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(14px) saturate(1.2);
  border:1px solid var(--line);border-radius:var(--r-l);
}
.hoverable{transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease}
.hoverable:hover{transform:translateY(-4px);border-color:rgba(56,207,255,.4);box-shadow:0 18px 50px -20px rgba(0,0,0,.7)}

/* ---------- Metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media(min-width:1024px){.metrics{grid-template-columns:repeat(4,1fr);gap:20px}}
.metric{position:relative;overflow:hidden;padding:22px 20px}
.metric::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,207,255,.8),transparent);
}
.metric-num{font-size:clamp(26px,3.2vw,34px);font-weight:700;color:#EAF2FF;font-variant-numeric:tabular-nums;line-height:1.2}
.metric-unit{font-size:14px;font-weight:600;color:var(--brand-2);margin-left:4px}
.metric-label{font-size:13px;color:var(--ink-3);margin-top:8px}
.metric-note{font-size:12px;color:var(--ink-3);margin-top:10px;padding-top:10px;border-top:1px dashed rgba(140,190,255,.12)}

/* ---------- Bars ---------- */
.bar-panel{padding:26px 22px}
@media(min-width:1024px){.bar-panel{padding:32px 30px}}
.bar-row{padding:14px 0;border-bottom:1px dashed rgba(140,190,255,.12)}
.bar-row:last-child{border-bottom:0;padding-bottom:4px}
.bar-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:14px;color:#D9E7FA;margin-bottom:9px}
.bar-val{font-variant-numeric:tabular-nums;font-weight:600;color:#EAF2FF}
.bar-track{height:10px;border-radius:var(--pill);background:rgba(255,255,255,.06);overflow:hidden}
.bar-fill{
  height:100%;border-radius:var(--pill);width:var(--w,0);
  background:linear-gradient(90deg,#38CFFF,#2DD4BF);
  box-shadow:0 0 18px rgba(56,207,255,.4);
  animation:barGrow .9s ease-out both;
}
.bar-fill.is-amber{background:linear-gradient(90deg,#FFB454,#FF9A2E);box-shadow:0 0 18px rgba(255,180,84,.4)}
@keyframes barGrow{from{width:0}to{width:var(--w)}}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-m);background:rgba(255,255,255,.02)}
.data-table{width:100%;border-collapse:collapse;min-width:680px}
.data-table thead th{
  background:rgba(56,207,255,.08);font-size:13px;font-weight:600;color:#CFE4FF;
  text-align:left;padding:14px 16px;white-space:nowrap;
}
.data-table tbody td{
  padding:14px 16px;font-size:14px;color:var(--ink-2);
  border-top:1px solid rgba(140,190,255,.1);white-space:nowrap;
}
.data-table tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.data-table tbody tr:hover{background:rgba(56,207,255,.06)}
.cell-strong{color:#E4EEFB;font-weight:600}
.table-hint{font-size:13px;color:var(--ink-3);margin-top:12px}

/* ---------- Scene grid ---------- */
.scene-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:1024px){
  .scene-grid{grid-template-columns:repeat(12,1fr)}
  .scene-main{grid-column:span 6}
  .scene-sm{grid-column:span 3}
  .scene-wide{grid-column:span 6}
}
.scene-card{padding:24px 22px;display:flex;flex-direction:column;gap:12px}
.scene-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(56,207,255,.12);border:1px solid rgba(56,207,255,.28);
}
.scene-icon svg{width:20px;height:20px;stroke:#8FE2FF;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.scene-icon.is-teal{background:rgba(45,212,191,.12);border-color:rgba(45,212,191,.28)}
.scene-icon.is-teal svg{stroke:#7BE6D4}
.scene-icon.is-amber{background:rgba(255,180,84,.12);border-color:rgba(255,180,84,.28)}
.scene-icon.is-amber svg{stroke:#FFD39A}
.scene-card h3{font-size:18px;font-weight:600;margin:0;color:#EAF2FF}
.scene-card p{margin:0;font-size:14px;color:var(--ink-2)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-500);margin-top:auto}
.link-arrow svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- Update list ---------- */
.update-layout{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:1024px){.update-layout{grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}}
.update-figure{border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line)}
.update-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.update-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.update-list li{display:flex;gap:12px;padding:16px 18px;border-radius:var(--r-m);border:1px solid var(--line);background:rgba(255,255,255,.03)}
.update-index{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:#04121F;background:linear-gradient(135deg,#38CFFF,#2DD4BF);
  font-variant-numeric:tabular-nums;
}
.update-list strong{display:block;font-size:15px;color:#E6F0FD;font-weight:600}
.update-list span{font-size:14px;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-m);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 20px;font-size:16px;font-weight:600;color:#E8F1FE;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-plus{flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:rgba(56,207,255,.12)}
.faq-plus svg{width:14px;height:14px;stroke:#8FE2FF;fill:none;stroke-width:2.2;stroke-linecap:round;transition:transform .25s ease}
.faq-item[open]{border-color:rgba(56,207,255,.42);box-shadow:0 18px 50px -26px rgba(0,0,0,.85)}
.faq-item[open] .faq-plus svg{transform:rotate(45deg)}
.faq-item[open]::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,#38CFFF,#2DD4BF);box-shadow:0 0 14px rgba(56,207,255,.8);
}
.faq-body{margin:0;padding:0 20px 18px 22px;font-size:15px;color:var(--ink-2)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-l);
  border:1px solid rgba(56,207,255,.3);
  background:linear-gradient(135deg,rgba(56,207,255,.16),rgba(45,212,191,.06) 60%,rgba(255,180,84,.08));
  padding:32px 24px;
  display:grid;grid-template-columns:1fr;gap:20px;align-items:center;
}
@media(min-width:1024px){.cta-band{grid-template-columns:1.4fr .6fr;padding:44px 40px}}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);font-weight:700;margin:0 0 10px;color:#F2F8FF}
.cta-band p{margin:0;font-size:15px;color:#C9DDF2}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid rgba(140,190,255,.12);padding:54px 0 24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:30px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark svg{stroke:#E7F6FF}
.footer-brand .brand-text{color:#F0F6FF}
.f-desc{font-size:14px;color:var(--ink-2);margin:0;max-width:340px}
.f-title{font-size:13px;font-weight:600;letter-spacing:.12em;color:#8DA3BC;margin-bottom:14px}
.f-list{display:flex;flex-direction:column;gap:10px}
.f-list a,.f-list span{font-size:14px;color:var(--ink-2);transition:color .2s ease,transform .2s ease}
.f-list a:hover{color:#8FE2FF;transform:translateX(2px)}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid rgba(140,190,255,.1);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--ink-3);
}

/* roulang page: category4 */
:root{
  --bg-base:#060B14;
  --bg-deep:#04070D;
  --panel:rgba(255,255,255,.05);
  --line:rgba(140,190,255,.14);
  --ink-1:#EAF2FF;
  --ink-2:#A9BCD4;
  --ink-3:#6E819B;
  --brand-500:#38CFFF;
  --brand-600:#1FA9D6;
  --brand-2:#2DD4BF;
  --accent:#FFB454;
  --danger:#FF6B81;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --shadow-card:0 18px 50px -20px rgba(0,0,0,.7);
  --glow:0 0 0 1px rgba(56,207,255,.35), 0 12px 40px -12px rgba(56,207,255,.55);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--ink-1);
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 16px;}
@media(min-width:1024px){.container{padding:0 24px;}}
.section{padding:56px 0;}
@media(min-width:1024px){.section{padding:88px 0;}}
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.32;letter-spacing:-.01em;}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:15.5px;}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 12px;border-radius:var(--r-pill);background:rgba(56,207,255,.12);color:#8FE4FF;border:1px solid rgba(56,207,255,.25);}
.badge.badge-amber{background:rgba(255,180,84,.12);color:#FFD79B;border-color:rgba(255,180,84,.28);}
.badge.badge-teal{background:rgba(45,212,191,.12);color:#8DF0E1;border-color:rgba(45,212,191,.28);}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border-radius:var(--r-pill);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .24s ease-out,box-shadow .24s ease-out,background .24s ease-out,border-color .24s ease-out;white-space:nowrap;}
.btn svg{width:16px;height:16px;}
.btn-primary{background:linear-gradient(135deg,var(--brand-500),var(--brand-2));color:#03121C;box-shadow:var(--glow);}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 0 1px rgba(56,207,255,.5),0 16px 44px -12px rgba(56,207,255,.7);}
.btn-primary:active{transform:translateY(1px) scale(.995);}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--ink-1);backdrop-filter:blur(10px);}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(56,207,255,.42);transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#F7FAFF;
  border-bottom:1px solid rgba(11,27,43,.08);
  transition:box-shadow .25s ease-out;
}
.site-header.scrolled{box-shadow:0 10px 30px -18px rgba(11,27,43,.42);}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand-500),var(--brand-2));display:grid;place-items:center;box-shadow:0 6px 18px -6px rgba(56,207,255,.75);}
.brand-mark svg{width:16px;height:16px;stroke:#04131E;stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round;}
.brand-text{font-size:17px;font-weight:700;color:#0B1B2B;letter-spacing:-.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{position:relative;font-size:14px;font-weight:500;color:#3C4E63;padding:8px 12px;border-radius:8px;transition:color .22s ease-out;white-space:nowrap;}
.nav-link::after{content:"";position:absolute;left:50%;bottom:2px;height:2px;width:0;border-radius:2px;background:linear-gradient(90deg,var(--brand-500),var(--brand-2));box-shadow:0 0 10px rgba(56,207,255,.85);transform:translateX(-50%);transition:width .24s ease-out;}
.nav-link:hover{color:var(--brand-600);}
.nav-link:hover::after,.nav-link.active::after{width:22px;}
.nav-link.active{color:#0B1B2B;font-weight:600;}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{display:flex;align-items:center;gap:8px;height:38px;padding:0 14px;border-radius:var(--r-pill);background:#FFFFFF;border:1px solid rgba(11,27,43,.1);transition:border-color .22s,box-shadow .22s;}
.search-box:focus-within{border-color:rgba(56,207,255,.7);box-shadow:0 0 0 3px rgba(56,207,255,.16);}
.search-box svg{width:16px;height:16px;stroke:#7A8DA3;fill:none;stroke-width:2;flex-shrink:0;}
.search-box input{border:0;outline:0;background:transparent;width:140px;font-size:14px;color:#0B1B2B;}
.search-box input::placeholder{color:#93A3B5;}
.menu-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid rgba(11,27,43,.12);background:#fff;align-items:center;justify-content:center;cursor:pointer;}
.menu-toggle svg{width:20px;height:20px;stroke:#0B1B2B;fill:none;stroke-width:2;stroke-linecap:round;}
.drawer-overlay{position:fixed;inset:0;background:rgba(4,7,13,.62);backdrop-filter:blur(3px);opacity:0;visibility:hidden;transition:opacity .28s ease-out,visibility .28s;z-index:70;}
.drawer-overlay.open{opacity:1;visibility:visible;}
.mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:80;padding:22px 20px;background:linear-gradient(160deg,rgba(12,22,38,.98),rgba(6,11,20,.98));border-left:1px solid var(--line);backdrop-filter:blur(16px);transform:translateX(102%);transition:transform .3s ease-out;display:flex;flex-direction:column;gap:18px;overflow-y:auto;}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-head .brand-text{color:var(--ink-1);font-size:16px;}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--ink-1);font-size:20px;line-height:1;cursor:pointer;}
.drawer-nav{display:grid;gap:6px;}
.drawer-nav a{font-size:16px;color:var(--ink-2);padding:11px 12px;border-radius:10px;border:1px solid transparent;transition:.22s;}
.drawer-nav a:hover{background:rgba(255,255,255,.06);color:var(--ink-1);}
.drawer-nav a.active{background:rgba(56,207,255,.12);border-color:rgba(56,207,255,.28);color:#CDF2FF;font-weight:600;}
@media(max-width:1150px){
  .search-box{display:none;}
}
@media(max-width:1023px){
  .main-nav{display:none;}
  .menu-toggle{display:flex;}
  .header-actions .btn{display:none;}
}

/* ---------- Hero ---------- */
.hero-cat4{position:relative;overflow:hidden;padding:70px 0 54px;border-bottom:1px solid var(--line);}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.26;transform:scale(1.03);}
.hero-cat4::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,11,20,.55) 0%,rgba(6,11,20,.88) 58%,var(--bg-base) 100%);}
.hero-inner{position:relative;z-index:2;max-width:860px;}
.hero-inner h1{margin:18px 0 16px;font-size:clamp(30px,4.2vw,48px);font-weight:700;line-height:1.24;letter-spacing:-.01em;}
.hero-sub{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:700px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line);}
.hero-meta li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--ink-3);}
.hero-meta svg{width:16px;height:16px;stroke:var(--brand-2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}

/* ---------- FAQ layout ---------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px;align-items:start;}
@media(min-width:1024px){.faq-layout{grid-template-columns:286px 1fr;gap:44px;}}
.toc-card{background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;backdrop-filter:blur(14px) saturate(1.2);box-shadow:var(--shadow-card);}
@media(min-width:1024px){.toc-card{position:sticky;top:96px;}}
.toc-title{font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--ink-3);margin-bottom:14px;}
.toc-list{display:grid;gap:4px;margin-bottom:16px;}
.toc-list a{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-2);padding:9px 10px;border-radius:var(--r-sm);transition:background .22s,color .22s,transform .22s;}
.toc-list a:hover{background:rgba(255,255,255,.06);color:var(--ink-1);transform:translateX(2px);}
.toc-list a span.num{font-size:12px;font-variant-numeric:tabular-nums;color:var(--brand-500);}
.faq-group{margin-bottom:46px;scroll-margin-top:96px;}
.faq-group:last-child{margin-bottom:0;}
.group-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:18px;scroll-margin-top:96px;}
.group-head h2{font-size:clamp(21px,2.4vw,27px);font-weight:700;letter-spacing:-.01em;}
.group-head p{width:100%;font-size:14.5px;color:var(--ink-3);margin-top:2px;}
.faq-item{position:relative;background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;backdrop-filter:blur(12px);transition:border-color .25s ease-out,transform .25s ease-out,box-shadow .25s ease-out;}
.faq-item::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;border-radius:2px;background:linear-gradient(180deg,var(--brand-500),var(--brand-2));box-shadow:0 0 12px rgba(56,207,255,.8);opacity:0;transition:opacity .25s ease-out;}
.faq-item:hover{border-color:rgba(56,207,255,.4);transform:translateY(-2px);box-shadow:var(--shadow-card);}
.faq-item[open]{border-color:rgba(56,207,255,.42);}
.faq-item[open]::before{opacity:1;}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;padding:17px 20px;font-size:16px;font-weight:600;line-height:1.6;color:var(--ink-1);transition:color .22s;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item[open] summary{color:#CDF2FF;}
.faq-icon{position:relative;margin-left:auto;flex:0 0 24px;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;transition:background .25s,transform .25s ease-out;}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:#9FD8F5;border-radius:2px;}
.faq-icon::before{width:10px;height:2px;}
.faq-icon::after{width:2px;height:10px;transition:transform .25s ease-out,opacity .25s ease-out;}
.faq-item[open] .faq-icon{background:rgba(56,207,255,.14);}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-answer{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);}
.faq-answer strong{color:var(--ink-1);font-weight:600;}

/* ---------- Guide cards ---------- */
.guide-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media(min-width:640px){.guide-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.guide-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.guide-card{position:relative;background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;backdrop-filter:blur(14px) saturate(1.2);transition:transform .25s ease-out,border-color .25s ease-out,box-shadow .25s ease-out;}
.guide-card::before{content:"";position:absolute;left:24px;right:24px;top:0;height:1px;background:linear-gradient(90deg,rgba(56,207,255,.65),transparent);opacity:0;transition:opacity .25s ease-out;}
.guide-card:hover{transform:translateY(-4px);border-color:rgba(56,207,255,.4);box-shadow:var(--shadow-card);}
.guide-card:hover::before{opacity:1;}
.guide-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:rgba(56,207,255,.12);border:1px solid rgba(56,207,255,.24);margin-bottom:16px;}
.guide-icon svg{width:20px;height:20px;stroke:var(--brand-500);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.guide-card h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.guide-card p{font-size:14.5px;color:var(--ink-2);}

/* ---------- Update strip ---------- */
.update-strip{display:flex;flex-wrap:wrap;align-items:center;gap:16px;background:linear-gradient(120deg,rgba(56,207,255,.1),rgba(45,212,191,.05));border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;}
.update-strip .u-mark{width:38px;height:38px;flex:0 0 38px;border-radius:11px;display:grid;place-items:center;background:rgba(45,212,191,.14);border:1px solid rgba(45,212,191,.3);}
.update-strip .u-mark svg{width:18px;height:18px;stroke:var(--brand-2);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.update-strip p{font-size:14.5px;color:var(--ink-2);flex:1 1 320px;min-width:240px;}
.update-strip strong{color:var(--ink-1);font-weight:600;}

/* ---------- CTA + form ---------- */
.cta-wrap{background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;backdrop-filter:blur(16px) saturate(1.2);box-shadow:var(--shadow-card);display:grid;grid-template-columns:1fr;}
@media(min-width:1024px){.cta-wrap{grid-template-columns:1fr 1fr;}}
.cta-side{padding:32px 26px;}
@media(min-width:1024px){.cta-side{padding:44px 40px;}}
.cta-side h2{font-size:clamp(23px,2.7vw,31px);font-weight:700;line-height:1.34;margin:14px 0 14px;letter-spacing:-.01em;}
.cta-side p{font-size:15.5px;color:var(--ink-2);}
.cta-figure{margin:24px 0 0;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);}
.cta-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.cta-points{display:grid;gap:12px;margin-top:24px;}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);}
.cta-points svg{width:16px;height:16px;margin-top:6px;stroke:var(--brand-2);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}
.form-side{padding:32px 26px;border-top:1px solid var(--line);background:rgba(4,7,13,.42);}
@media(min-width:1024px){.form-side{padding:44px 40px;border-top:0;border-left:1px solid var(--line);}}
.form-grid{display:grid;grid-template-columns:1fr;gap:16px;}
@media(min-width:640px){.form-grid{grid-template-columns:1fr 1fr;}.form-grid .span-2{grid-column:span 2;}}
.form-field{display:grid;gap:8px;}
.form-field label{font-size:13px;color:var(--ink-3);font-weight:500;}
.field{width:100%;background:rgba(255,255,255,.04);border:1px solid transparent;border-radius:var(--r-sm);padding:12px 14px;font-size:15px;color:var(--ink-1);outline:none;transition:border-color .22s,box-shadow .22s,background .22s;}
.field::placeholder{color:#66798F;}
.field:hover{background:rgba(255,255,255,.055);}
.field:focus{border-color:rgba(56,207,255,.65);background:rgba(255,255,255,.07);box-shadow:0 0 0 3px rgba(56,207,255,.15);}
textarea.field{min-height:112px;resize:vertical;line-height:1.75;}
select.field{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#7E93AA 50%),linear-gradient(135deg,#7E93AA 50%,transparent 50%);background-position:calc(100% - 19px) calc(50% - 2px),calc(100% - 14px) calc(50% - 2px);background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:40px;}
select.field option{background:#0B1320;color:#EAF2FF;}
.form-note{font-size:13px;color:var(--ink-3);margin-top:14px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:58px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{color:var(--ink-1);}
.f-desc{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:340px;}
.f-title{font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--ink-2);margin-bottom:14px;}
.f-list{display:grid;gap:10px;}
.f-list a,.f-list span{font-size:14px;color:var(--ink-3);transition:color .22s ease-out,transform .22s ease-out;}
.f-list a:hover{color:var(--brand-500);transform:translateX(2px);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;border-top:1px solid var(--line);margin-top:42px;padding-top:20px;font-size:13px;color:var(--ink-3);}