/* roulang page: index */
:root{
  --bg:#060d1c;
  --bg-soft:#0a1730;
  --panel:rgba(17,33,62,.62);
  --panel-hi:rgba(24,46,84,.8);
  --line:rgba(96,165,250,.16);
  --line-hi:rgba(96,165,250,.45);
  --text:#e8f1ff;
  --muted:#93a9c9;
  --primary:#2f8bff;
  --accent:#35e0d0;
  --warn:#ffb648;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 18px 44px rgba(2,9,22,.6);
  --shadow-hover:0 26px 56px rgba(2,9,22,.74);
  --glow:0 0 22px rgba(47,139,255,.5);
  --ease:.22s ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15.5px;
  line-height:1.78;
  color:var(--text);
  background:
    radial-gradient(1200px 620px at 6% -12%, rgba(47,139,255,.24), transparent 62%),
    radial-gradient(960px 520px at 100% 2%, rgba(53,224,208,.14), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
img{max-width:100%;display:block;height:auto}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:84px 0;position:relative;scroll-margin-top:110px}
.section-alt{background:linear-gradient(180deg,rgba(10,23,48,.72),rgba(6,13,28,.24));border-top:1px solid rgba(96,165,250,.1);border-bottom:1px solid rgba(96,165,250,.1)}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:2px;color:var(--accent);text-transform:uppercase;margin-bottom:14px}
.sec-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.sec-head h2{font-size:30px;line-height:1.35;font-weight:800;letter-spacing:-.4px}
.sec-head p{margin-top:14px;color:var(--muted);font-size:15px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card-glass{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.card-glass:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi);background:var(--panel-hi)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:12px 26px;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);min-height:44px}
.btn-primary{background:linear-gradient(135deg,#2f8bff,#35e0d0);color:#04101f;box-shadow:0 0 24px rgba(47,139,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(53,224,208,.58);color:#04101f}
.btn-ghost{background:rgba(96,165,250,.08);border-color:rgba(96,165,250,.4);color:#d6e6ff}
.btn-ghost:hover{background:rgba(96,165,250,.18);border-color:var(--line-hi);transform:translateY(-2px);color:#fff}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:4px 11px;border-radius:999px;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#a9cdfb}
.tag-accent{background:rgba(53,224,208,.14);border-color:rgba(53,224,208,.34);color:#6ff0e2}
.icon-line{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* header */
.site-header{position:sticky;top:0;z-index:1030}
.topbar{background:linear-gradient(90deg,rgba(47,139,255,.2),rgba(53,224,208,.12));border-bottom:1px solid rgba(96,165,250,.16);font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:40px;overflow:hidden}
.topbar-inner p{color:#c8dcf6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);flex-shrink:0}
.topbar-links{margin-left:auto;display:flex;gap:18px;flex-shrink:0}
.topbar-links a{color:#9fc4f0;font-size:12.5px}
.topbar-links a:hover{color:#fff}
.mainbar{background:rgba(7,17,35,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(96,165,250,.16);transition:box-shadow var(--ease)}
.site-header.scrolled .mainbar{box-shadow:0 12px 30px rgba(2,9,22,.62)}
.mainbar-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;color:#04101f;box-shadow:0 0 20px rgba(47,139,255,.5)}
.brand-text strong{display:block;font-size:15.5px;letter-spacing:.3px;color:#fff;line-height:1.3}
.brand-text small{display:block;font-size:11px;letter-spacing:1.6px;color:#7f9bbe}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#b9cbe6;transition:color var(--ease),background var(--ease),box-shadow var(--ease);white-space:nowrap}
.nav-link:hover{color:#fff;background:rgba(47,139,255,.14)}
.nav-link.active{color:#fff;background:rgba(47,139,255,.2);box-shadow:inset 0 0 0 1px rgba(96,165,250,.36)}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(96,165,250,.18);border-radius:10px;padding:8px 13px;min-width:186px;transition:border-color var(--ease),background var(--ease)}
.nav-search:focus-within{border-color:var(--line-hi);background:rgba(255,255,255,.1)}
.nav-search svg{flex-shrink:0;color:#7f9bbe}
.nav-search input{background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%}
.nav-search input::placeholder{color:#6f88a8}
.nav-cta{flex-shrink:0;padding:10px 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.28);color:#cfe2ff;align-items:center;justify-content:center;cursor:pointer}
.mobile-drawer{display:none;background:rgba(6,13,28,.98);border-top:1px solid var(--line);backdrop-filter:blur(18px)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:48px;padding:0 20px;color:#cfdcf0;border-bottom:1px solid rgba(96,165,250,.1);font-size:15px}
.mobile-drawer a.active{color:#fff;background:rgba(47,139,255,.16)}
.mobile-drawer .drawer-cta{margin:16px 20px;display:flex}

/* hero */
.hero{position:relative;overflow:hidden;padding:70px 0 84px;scroll-margin-top:110px}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.28;filter:saturate(1.1)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(6,13,28,.94) 22%,rgba(6,13,28,.72) 62%,rgba(6,13,28,.92))}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:7px 16px;border-radius:999px;background:rgba(53,224,208,.12);border:1px solid rgba(53,224,208,.36);font-size:13px;color:#7bf0e2;margin-bottom:22px}
.hero-badge span.pulse{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.hero h1{font-size:42px;line-height:1.26;font-weight:800;letter-spacing:-.8px}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#63b3ff,#35e0d0);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{margin-top:20px;color:#b6c9e4;font-size:15.5px;max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-panel{padding:26px;border-radius:18px;border:1px solid rgba(96,165,250,.24);background:rgba(13,28,54,.72);backdrop-filter:blur(16px);box-shadow:0 24px 60px rgba(2,9,22,.7)}
.hero-panel-title{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);letter-spacing:1px;margin-bottom:18px}
.hero-panel-title b{color:var(--accent);font-weight:600}
.ring-row{display:flex;align-items:center;gap:22px}
.ring{--p:0;width:164px;height:164px;flex-shrink:0;border-radius:50%;background:conic-gradient(#35e0d0 calc(var(--p) * 1%), rgba(120,170,255,.13) 0);display:grid;place-items:center;position:relative;box-shadow:0 0 42px rgba(53,224,208,.24)}
.ring::after{content:"";position:absolute;inset:9px;border-radius:50%;background:#0a1730;border:1px solid rgba(96,165,250,.2)}
.ring-inner{position:relative;z-index:1;text-align:center;line-height:1.2}
.ring-num{display:block;font-size:38px;font-weight:800;color:#fff;letter-spacing:-1px}
.ring-unit{display:block;font-size:12px;color:var(--muted);letter-spacing:1.6px;margin-top:4px}
.ring-side{flex:1;min-width:0}
.ring-hms{font-size:26px;font-weight:700;letter-spacing:2px;color:#9fe8ff;font-variant-numeric:tabular-nums}
.ring-side p{font-size:13px;color:var(--muted);margin-top:6px}
.hero-points{margin-top:20px;padding-top:18px;border-top:1px solid rgba(96,165,250,.16);display:grid;gap:10px}
.hero-points li{display:flex;gap:10px;font-size:13.8px;color:#bdcfe8}
.hero-points li::before{content:"";flex-shrink:0;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}

/* metrics */
.metric{padding:24px 22px;text-align:left}
.metric b{display:block;font-size:32px;font-weight:800;letter-spacing:-1px;background:linear-gradient(120deg,#7cc0ff,#35e0d0);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric span{display:block;font-size:13.5px;color:var(--muted);margin-top:4px}

/* channel cards */
.channel-card{display:block;padding:0;overflow:hidden}
.channel-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.channel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.channel-card:hover .thumb img{transform:scale(1.06)}
.channel-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,28,.05),rgba(6,13,28,.82))}
.channel-card .body{padding:22px 24px 26px}
.channel-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.channel-card p{font-size:14.2px;color:var(--muted);min-height:66px}
.channel-more{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-size:13.5px;color:#6fe6d8;font-weight:600}
.channel-card:hover .channel-more{gap:11px}

/* post cards */
.post-card{overflow:hidden;display:flex;flex-direction:column;padding:0}
.post-card .cover{aspect-ratio:16/10;overflow:hidden}
.post-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.post-card:hover .cover img{transform:scale(1.05)}
.post-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{font-size:17px;font-weight:700;line-height:1.5}
.post-body p{font-size:13.8px;color:var(--muted);flex:1}
.post-meta{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:#7f9bbe;margin-top:4px}
.empty-note{padding:26px;border-radius:var(--radius);border:1px dashed rgba(96,165,250,.3);color:var(--muted);text-align:center;background:rgba(17,33,62,.4)}

/* feature */
.feature{padding:26px 24px}
.feature .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#7cc0ff;margin-bottom:16px}
.feature h3{font-size:17.5px;font-weight:700;margin-bottom:9px}
.feature p{font-size:14px;color:var(--muted)}

/* category pills */
.pill-row{display:flex;flex-wrap:wrap;gap:14px}
.pill{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:999px;border:1px solid rgba(96,165,250,.26);background:rgba(17,33,62,.6);font-size:14.5px;color:#cfe2ff;transition:transform var(--ease),border-color var(--ease),background var(--ease),box-shadow var(--ease)}
.pill:hover{transform:translateY(-3px);border-color:var(--line-hi);background:rgba(24,46,84,.85);box-shadow:0 12px 26px rgba(2,9,22,.6);color:#fff}
.pill b{color:var(--accent);font-weight:700}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.split-img{border-radius:18px;overflow:hidden;border:1px solid rgba(96,165,250,.2);box-shadow:var(--shadow)}
.split-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split h2{font-size:29px;font-weight:800;line-height:1.35;margin-bottom:16px}
.split p{color:var(--muted);font-size:15px}
.check-list{margin-top:22px;display:grid;gap:13px}
.check-list li{display:flex;gap:12px;font-size:14.3px;color:#c4d6ee}
.check-list li svg{flex-shrink:0;margin-top:4px;color:var(--accent)}

/* timeline */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:6px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,rgba(47,139,255,.7),rgba(53,224,208,.25))}
.tl-item{position:relative;padding:0 0 26px 20px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-26px;top:8px;width:12px;height:12px;border-radius:50%;background:#0a1730;border:2px solid var(--accent);box-shadow:0 0 12px rgba(53,224,208,.6)}
.tl-item h4{font-size:16.5px;font-weight:700}
.tl-item time{display:block;font-size:12.5px;color:#7f9bbe;margin:3px 0 7px;letter-spacing:.6px}
.tl-item p{font-size:14px;color:var(--muted)}

/* quote */
.quote{padding:26px 24px}
.quote p{font-size:14.4px;color:#c4d6ee}
.quote-user{display:flex;align-items:center;gap:12px;margin-top:18px}
.quote-avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;font-weight:700;color:#04101f;font-size:15px}
.quote-user b{display:block;font-size:14px;color:#e8f1ff}
.quote-user span{display:block;font-size:12.5px;color:#7f9bbe}

/* steps */
.step{padding:26px 24px;position:relative}
.step .num{font-size:34px;font-weight:800;letter-spacing:-2px;background:linear-gradient(120deg,#7cc0ff,#35e0d0);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.step h3{font-size:17px;font-weight:700;margin:14px 0 8px}
.step p{font-size:14px;color:var(--muted)}

/* faq */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:rgba(17,33,62,.55);overflow:hidden;transition:border-color var(--ease),background var(--ease)}
.faq-item[open]{border-color:var(--line-hi);background:rgba(24,46,84,.7)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:15.2px;font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--accent);flex-shrink:0;transition:transform var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 20px;font-size:14.2px;color:var(--muted)}

/* cta */
.cta-band{position:relative;overflow:hidden;border-radius:20px;padding:52px 44px;border:1px solid rgba(96,165,250,.28);background:rgba(11,26,50,.82);backdrop-filter:blur(16px);box-shadow:0 30px 70px rgba(2,9,22,.7)}
.cta-band::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-4.webp') center/cover no-repeat;opacity:.16}
.cta-band::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 88% 10%,rgba(53,224,208,.24),transparent 70%)}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:38px;align-items:center}
.cta-inner h2{font-size:29px;font-weight:800;line-height:1.35}
.cta-inner p{margin-top:14px;color:var(--muted);font-size:14.8px}
.cta-form{background:rgba(6,13,28,.6);border:1px solid rgba(96,165,250,.24);border-radius:14px;padding:22px}
.cta-form label{display:block;font-size:12.8px;color:#9fb8d6;margin-bottom:7px}
.cta-form .field{margin-bottom:14px}
.cta-form input{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(96,165,250,.24);background:rgba(255,255,255,.05);color:var(--text);font-size:14px;outline:none;transition:border-color var(--ease),background var(--ease)}
.cta-form input:focus{border-color:var(--line-hi);background:rgba(255,255,255,.09)}
.cta-form .hint{font-size:12.2px;color:#7f9bbe;margin-top:10px}

/* footer */
.site-footer{border-top:1px solid rgba(96,165,250,.16);background:rgba(4,9,20,.9);padding:56px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:38px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:16px}
.footer-brand .brand-mark{width:36px;height:36px;border-radius:10px}
.footer-brand strong{font-size:15.5px;color:#fff}
.site-footer p{font-size:13.8px;color:var(--muted);max-width:360px}
.footer-col h4{font-size:14px;font-weight:700;color:#dbe9fb;margin-bottom:16px;letter-spacing:.6px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.8px;color:var(--muted);transition:color var(--ease)}
.footer-col a:hover{color:#fff}
.footer-bottom{margin-top:38px;padding-top:20px;border-top:1px solid rgba(96,165,250,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.8px;color:#6f88a8}

@media (max-width:1100px){
  .nav-search{display:none}
  .hero h1{font-size:36px}
}
@media (max-width:992px){
  .nav-desktop,.nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .split{grid-template-columns:1fr;gap:28px}
  .cta-inner{grid-template-columns:1fr;gap:26px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section{padding:66px 0}
  .cta-band{padding:40px 28px}
  .topbar-links{display:none}
}
@media (max-width:768px){
  .hero{padding:52px 0 62px}
  .hero h1{font-size:30px;letter-spacing:-.4px}
  .sec-head h2{font-size:24px}
  .split h2,.cta-inner h2{font-size:23px}
  .ring-row{flex-direction:column;align-items:flex-start;gap:18px}
  .ring-side{width:100%}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .section{padding:54px 0}
  .mainbar-inner{height:64px;gap:10px}
  .brand-mark{width:36px;height:36px;border-radius:10px}
  .brand-text strong{font-size:14px}
  .brand-text small{display:none}
}
@media (max-width:520px){
  .hero h1{font-size:26px}
  .hero-actions .btn{width:100%}
  .topbar-inner{height:auto;padding:8px 0;font-size:12px}
  .ring{width:140px;height:140px}
  .ring-num{font-size:32px}
  .ring-hms{font-size:22px}
  .cta-band{padding:30px 20px;border-radius:16px}
  .wrap{padding:0 16px}
}

/* roulang page: article */
:root{
 --bg:#060d1c;
 --bg-soft:#0a1730;
 --panel:rgba(17,33,62,.62);
 --panel-hi:rgba(24,46,84,.8);
 --line:rgba(96,165,250,.16);
 --line-hi:rgba(96,165,250,.45);
 --text:#e8f1ff;
 --muted:#93a9c9;
 --primary:#2f8bff;
 --accent:#35e0d0;
 --warn:#ffb648;
 --radius:14px;
 --radius-sm:10px;
 --shadow:0 18px 44px rgba(2,9,22,.6);
 --shadow-hover:0 26px 56px rgba(2,9,22,.74);
 --glow:0 0 22px rgba(47,139,255,.5);
 --ease:.22s ease;
 --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15.5px;
 line-height:1.78;
 color:var(--text);
 background:
 radial-gradient(1200px 620px at 6% -12%, rgba(47,139,255,.24), transparent 62%),
 radial-gradient(960px 520px at 100% 2%, rgba(53,224,208,.14), transparent 58%),
 var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
img{max-width:100%;display:block;height:auto}
button,input{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.icon-line{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:84px 0;position:relative;scroll-margin-top:110px}
.section-alt{background:linear-gradient(180deg,rgba(10,23,48,.72),rgba(6,13,28,.24));border-top:1px solid rgba(96,165,250,.1);border-bottom:1px solid rgba(96,165,250,.1)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px;flex-wrap:wrap}
.section-title{font-size:26px;font-weight:700;color:#fff;letter-spacing:.4px;display:flex;align-items:center;gap:12px}
.section-title::before{content:"";width:5px;height:24px;border-radius:3px;background:linear-gradient(180deg,var(--primary),var(--accent));box-shadow:0 0 14px rgba(47,139,255,.6)}
.section-sub{font-size:14px;color:var(--muted);margin-top:8px;max-width:640px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card-glass{
 background:var(--panel);
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.card-glass:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi);background:var(--panel-hi)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:12px 26px;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);min-height:44px;line-height:1.2}
.btn-primary{background:linear-gradient(135deg,#2f8bff,#35e0d0);color:#04101f;box-shadow:0 0 24px rgba(47,139,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(53,224,208,.58);color:#04101f}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 16px rgba(47,139,255,.42)}
.btn-ghost{background:rgba(96,165,250,.08);border-color:rgba(96,165,250,.4);color:#d6e6ff}
.btn-ghost:hover{background:rgba(96,165,250,.18);border-color:var(--line-hi);transform:translateY(-2px);color:#fff}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:4px 11px;border-radius:999px;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#a9cdfb;line-height:1.6}
.tag-accent{background:rgba(53,224,208,.14);border-color:rgba(53,224,208,.34);color:#6ff0e2}
.tag-warn{background:rgba(255,182,72,.12);border-color:rgba(255,182,72,.34);color:#ffcf87}
/* header */
.site-header{position:sticky;top:0;z-index:1030}
.topbar{background:linear-gradient(90deg,rgba(47,139,255,.2),rgba(53,224,208,.12));border-bottom:1px solid rgba(96,165,250,.16);font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:40px;overflow:hidden}
.topbar-inner p{color:#c8dcf6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);flex-shrink:0}
.topbar-links{margin-left:auto;display:flex;gap:18px;flex-shrink:0}
.topbar-links a{color:#9fc4f0;font-size:12.5px;transition:color var(--ease)}
.topbar-links a:hover{color:#fff}
.mainbar{background:rgba(7,17,35,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(96,165,250,.16);transition:box-shadow var(--ease)}
.site-header.scrolled .mainbar{box-shadow:0 12px 30px rgba(2,9,22,.62)}
.mainbar-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;color:#04101f;box-shadow:0 0 20px rgba(47,139,255,.5);flex-shrink:0}
.brand-mark svg{width:22px;height:22px}
.brand-text strong{display:block;font-size:15.5px;letter-spacing:.3px;color:#fff;line-height:1.3}
.brand-text small{display:block;font-size:11px;letter-spacing:1.6px;color:#7f9bbe}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#b9cbe6;transition:color var(--ease),background var(--ease),box-shadow var(--ease);white-space:nowrap}
.nav-link:hover{color:#fff;background:rgba(47,139,255,.14)}
.nav-link.active{color:#fff;background:rgba(47,139,255,.2);box-shadow:inset 0 0 0 1px rgba(96,165,250,.36)}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(96,165,250,.18);border-radius:10px;padding:8px 13px;min-width:186px;transition:border-color var(--ease),background var(--ease)}
.nav-search:focus-within{border-color:var(--line-hi);background:rgba(255,255,255,.1)}
.nav-search svg{flex-shrink:0;color:#7f9bbe}
.nav-search input{background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%}
.nav-search input::placeholder{color:#6f88a8}
.nav-cta{flex-shrink:0;padding:10px 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.28);color:#cfe2ff;align-items:center;justify-content:center;cursor:pointer}
.mobile-drawer{display:none;background:rgba(6,13,28,.98);border-top:1px solid var(--line);backdrop-filter:blur(18px)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:48px;padding:0 20px;color:#cfdcf0;border-bottom:1px solid rgba(96,165,250,.1);font-size:15px}
.mobile-drawer a.active{color:#fff;background:rgba(47,139,255,.16)}
.mobile-drawer .drawer-cta{margin:16px 20px;display:flex;border-bottom:0}
/* article head */
.article-head{position:relative;overflow:hidden;padding:46px 0 62px;scroll-margin-top:110px}
.article-head-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.22;filter:saturate(1.05)}
.article-head::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(6,13,28,.95) 20%,rgba(6,13,28,.76) 60%,rgba(6,13,28,.94))}
.article-head .wrap{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#8ba6c9;flex-wrap:wrap;margin-bottom:22px}
.crumb a{color:#a9cdfb;transition:color var(--ease)}
.crumb a:hover{color:#fff}
.crumb span.sep{color:#4d6c94}
.article-head-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:36px;align-items:center}
.article-head h1{font-size:clamp(24px,3.2vw,38px);line-height:1.4;font-weight:800;color:#fff;letter-spacing:.3px;margin-bottom:16px}
.article-lead{font-size:15px;color:#b9cbe6;line-height:1.85;margin-bottom:20px}
.meta-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px;color:#8ba6c9}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#4d6c94}
.head-cover{border-radius:16px;overflow:hidden;border:1px solid var(--line-hi);box-shadow:var(--shadow),0 0 40px rgba(47,139,255,.22);position:relative}
.head-cover img{width:100%;aspect-ratio:16/10;object-fit:cover}
.head-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(6,13,28,.72))}
.head-cover-cap{position:absolute;left:16px;bottom:14px;z-index:2;font-size:12.5px;color:#cfe2ff;letter-spacing:.4px}
/* article body */
.article-body{padding:56px 0 20px}
.article-shell{padding:34px 36px;border-radius:var(--radius)}
.article-content{font-size:15.5px;line-height:1.86;color:#dbe8fa}
.article-content h2{font-size:22px;font-weight:700;color:#fff;margin:34px 0 14px;padding-left:14px;border-left:3px solid var(--primary);line-height:1.5}
.article-content h2:first-child{margin-top:0}
.article-content h3{font-size:18px;font-weight:700;color:#eaf3ff;margin:24px 0 10px}
.article-content p{margin:0 0 15px}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:22px}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin-bottom:9px}
.article-content a{color:var(--accent);border-bottom:1px dashed rgba(53,224,208,.5)}
.article-content a:hover{color:#fff}
.article-content img{border-radius:12px;border:1px solid var(--line);margin:20px 0}
.article-content blockquote{margin:22px 0;padding:16px 20px;border-left:3px solid var(--accent);background:rgba(53,224,208,.07);border-radius:0 12px 12px 0;color:#cfe6ff}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-content th,.article-content td{border:1px solid rgba(96,165,250,.18);padding:10px 13px;text-align:left}
.article-content th{background:rgba(47,139,255,.14);color:#fff;font-weight:600}
.article-content code{background:rgba(47,139,255,.16);padding:2px 6px;border-radius:6px;font-size:13.5px;color:#a9cdfb}
.article-content strong{color:#fff;font-weight:700}
.empty-state{text-align:center;padding:26px 10px 8px}
.empty-state h2{font-size:22px;color:#fff;margin-bottom:10px;border:0;padding:0}
.empty-state p{color:var(--muted);margin-bottom:22px}
/* metrics */
.metric-card{padding:24px 22px}
.metric-label{font-size:12.5px;letter-spacing:1.2px;color:#7f9bbe;text-transform:uppercase;margin-bottom:10px}
.metric-value{font-size:24px;font-weight:800;color:#fff;line-height:1.3;background:linear-gradient(120deg,#ffffff,#8fd8ff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.metric-desc{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.7}
/* spec */
.spec-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:start}
.spec-card{padding:28px 30px}
.spec-row{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:13px 0;border-bottom:1px dashed rgba(96,165,250,.16);font-size:14.5px;align-items:baseline}
.spec-row:last-child{border-bottom:0}
.spec-row .k{color:#8ba6c9}
.spec-row .v{color:#e8f1ff;font-weight:600}
.device-card{padding:22px 24px;margin-bottom:18px}
.device-card h4{font-size:16px;color:#fff;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.device-card p{font-size:14px;color:#b9cbe6;line-height:1.78}
.device-card .num{width:26px;height:26px;border-radius:8px;background:rgba(47,139,255,.2);border:1px solid rgba(96,165,250,.36);display:grid;place-items:center;font-size:12.5px;color:#a9cdfb;font-weight:700;flex-shrink:0}
/* download bar */
.dl-bar{display:flex;align-items:center;gap:26px;padding:28px 30px;border-radius:var(--radius);background:linear-gradient(120deg,rgba(47,139,255,.26),rgba(53,224,208,.12));border:1px solid rgba(96,165,250,.4);box-shadow:var(--glow),var(--shadow);flex-wrap:wrap;margin-top:26px}
.dl-bar-text{flex:1 1 340px;min-width:0}
.dl-bar-text h3{font-size:20px;color:#fff;margin-bottom:8px}
.dl-bar-text p{font-size:14px;color:#c6dbf6;line-height:1.75}
.dl-bar-actions{display:flex;gap:12px;flex-wrap:wrap}
.trust-list{margin-top:22px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.trust-item{display:flex;gap:12px;padding:18px 20px;border-radius:var(--radius-sm);background:rgba(255,255,255,.04);border:1px solid var(--line)}
.trust-item svg{color:var(--accent);flex-shrink:0;margin-top:3px}
.trust-item strong{display:block;color:#fff;font-size:14.5px;margin-bottom:4px}
.trust-item span{font-size:13px;color:var(--muted);line-height:1.7;display:block}
/* info cards */
.info-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.info-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.info-card-body{padding:22px 24px 24px}
.info-card h3{font-size:17px;color:#fff;margin-bottom:10px;line-height:1.5}
.info-card p{font-size:14px;color:#b9cbe6;line-height:1.78;margin-bottom:14px}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:#a9cdfb;font-weight:600;transition:color var(--ease),gap var(--ease)}
.card-link:hover{color:var(--accent);gap:10px}
/* faq */
.faq-list{display:grid;gap:14px;max-width:940px}
.faq-item{padding:0;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-size:16px;font-weight:600;color:#eaf3ff;display:flex;align-items:center;gap:14px;transition:color var(--ease),background var(--ease)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;font-size:20px;color:var(--accent);font-weight:400;transition:transform var(--ease)}
.faq-item[open] summary{color:#fff;background:rgba(47,139,255,.1)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px 22px;font-size:14.5px;color:#b9cbe6;line-height:1.82}
.faq-item summary:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
/* cta */
.cta-box{position:relative;overflow:hidden;border-radius:18px;padding:46px 44px;background:linear-gradient(120deg,rgba(47,139,255,.24),rgba(53,224,208,.1));border:1px solid rgba(96,165,250,.4);box-shadow:var(--shadow)}
.cta-box::before{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(53,224,208,.32),transparent 68%)}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;gap:32px;justify-content:space-between;flex-wrap:wrap}
.cta-inner h2{font-size:26px;color:#fff;margin-bottom:10px}
.cta-inner p{font-size:14.5px;color:#c6dbf6;max-width:560px;line-height:1.8}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
/* footer */
.site-footer{background:linear-gradient(180deg,rgba(8,18,36,.9),rgba(4,10,22,.98));border-top:1px solid rgba(96,165,250,.18);padding:56px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:36px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer-brand strong{font-size:16px;color:#fff;letter-spacing:.3px}
.site-footer p{font-size:13.5px;color:#93a9c9;line-height:1.8;max-width:420px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;letter-spacing:.6px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13.5px;color:#93a9c9;transition:color var(--ease),padding-left var(--ease)}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(96,165,250,.14);padding:18px 0;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;font-size:13px;color:#7f9bbe}
@media(max-width:1080px){
 .nav-search{display:none}
 .article-head-grid{grid-template-columns:1fr;gap:26px}
 .spec-wrap{grid-template-columns:1fr}
 .trust-list{grid-template-columns:1fr 1fr}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
 .nav-desktop,.nav-cta{display:none}
 .nav-toggle{display:inline-flex;margin-left:auto}
 .grid-4{grid-template-columns:1fr 1fr}
 .grid-3{grid-template-columns:1fr 1fr}
 .cta-box{padding:34px 26px}
 .article-shell{padding:26px 22px}
}
@media(max-width:768px){
 .section{padding:60px 0}
 .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
 .trust-list{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr;gap:26px}
 .cta-inner{gap:22px}
 .article-head{padding:34px 0 46px}
 .mainbar-inner{height:64px;gap:10px}
 .brand-text small{display:none}
 .section-title{font-size:22px}
 .faq-item summary{padding:16px 18px;font-size:15px}
 .faq-item .faq-a{padding:0 18px 18px}
}
@media(max-width:520px){
 .wrap{padding:0 15px}
 .topbar-links{display:none}
 .topbar-inner p{font-size:12px}
 .dl-bar{padding:22px 18px;gap:18px}
 .dl-bar-actions .btn{flex:1 1 100%}
 .cta-box{padding:26px 18px;border-radius:14px}
 .cta-inner h2{font-size:21px}
 .article-shell{padding:22px 16px}
 .spec-row{grid-template-columns:1fr;gap:2px}
 .metric-value{font-size:21px}
 .brand-text strong{font-size:14px}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .btn{padding:11px 20px;font-size:14px}
}

/* roulang page: category1 */
:root{
 --bg:#060d1c;
 --bg-soft:#0a1730;
 --panel:rgba(17,33,62,.62);
 --panel-hi:rgba(24,46,84,.8);
 --line:rgba(96,165,250,.16);
 --line-hi:rgba(96,165,250,.45);
 --text:#e8f1ff;
 --muted:#93a9c9;
 --primary:#2f8bff;
 --accent:#35e0d0;
 --warn:#ffb648;
 --radius:14px;
 --radius-sm:10px;
 --shadow:0 18px 44px rgba(2,9,22,.6);
 --shadow-hover:0 26px 56px rgba(2,9,22,.74);
 --glow:0 0 22px rgba(47,139,255,.5);
 --ease:.22s ease;
 --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15.5px;
 line-height:1.78;
 color:var(--text);
 background:
 radial-gradient(1200px 620px at 6% -12%, rgba(47,139,255,.24), transparent 62%),
 radial-gradient(960px 520px at 100% 2%, rgba(53,224,208,.14), transparent 58%),
 var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease)}
a:hover{color:#fff}
img{max-width:100%;display:block;height:auto}
button,input,select{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:#fff}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.icon-line{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1030}
.topbar{background:linear-gradient(90deg,rgba(47,139,255,.2),rgba(53,224,208,.12));border-bottom:1px solid rgba(96,165,250,.16);font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:40px;overflow:hidden}
.topbar-inner p{color:#c8dcf6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);flex-shrink:0}
.topbar-links{margin-left:auto;display:flex;gap:18px;flex-shrink:0}
.topbar-links a{color:#9fc4f0;font-size:12.5px}
.topbar-links a:hover{color:#fff}
.mainbar{background:rgba(7,17,35,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(96,165,250,.16);transition:box-shadow var(--ease)}
.site-header.scrolled .mainbar{box-shadow:0 12px 30px rgba(2,9,22,.62)}
.mainbar-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;color:#04101f;box-shadow:0 0 20px rgba(47,139,255,.5)}
.brand-text strong{display:block;font-size:15.5px;letter-spacing:.3px;color:#fff;line-height:1.3}
.brand-text small{display:block;font-size:11px;letter-spacing:1.6px;color:#7f9bbe}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#b9cbe6;white-space:nowrap}
.nav-link:hover{color:#fff;background:rgba(47,139,255,.14)}
.nav-link.active{color:#fff;background:rgba(47,139,255,.2);box-shadow:inset 0 0 0 1px rgba(96,165,250,.36)}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(96,165,250,.18);border-radius:10px;padding:8px 13px;min-width:186px;transition:border-color var(--ease),background var(--ease)}
.nav-search:focus-within{border-color:var(--line-hi);background:rgba(255,255,255,.1)}
.nav-search svg{flex-shrink:0;color:#7f9bbe;width:17px;height:17px}
.nav-search input{background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%}
.nav-search input::placeholder{color:#6f88a8}
.nav-cta{flex-shrink:0;padding:10px 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.28);color:#cfe2ff;align-items:center;justify-content:center;cursor:pointer}
.mobile-drawer{display:none;background:rgba(6,13,28,.98);border-top:1px solid var(--line);backdrop-filter:blur(18px)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:48px;padding:0 20px;color:#cfdcf0;border-bottom:1px solid rgba(96,165,250,.1);font-size:15px}
.mobile-drawer a.active{color:#fff;background:rgba(47,139,255,.16)}
.mobile-drawer .drawer-cta{margin:16px 20px;display:flex}
/* ============ buttons / tags ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:12px 26px;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);min-height:44px}
.btn-primary{background:linear-gradient(135deg,#2f8bff,#35e0d0);color:#04101f;box-shadow:0 0 24px rgba(47,139,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(53,224,208,.58);color:#04101f}
.btn-ghost{background:rgba(96,165,250,.08);border-color:rgba(96,165,250,.4);color:#d6e6ff}
.btn-ghost:hover{background:rgba(96,165,250,.18);border-color:var(--line-hi);transform:translateY(-2px);color:#fff}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:4px 11px;border-radius:999px;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#a9cdfb}
.tag-accent{background:rgba(53,224,208,.14);border-color:rgba(53,224,208,.34);color:#6ff0e2}
/* ============ layout ============ */
.section{padding:84px 0;position:relative;scroll-margin-top:110px}
.section-alt{background:linear-gradient(180deg,rgba(10,23,48,.72),rgba(6,13,28,.24));border-top:1px solid rgba(96,165,250,.1);border-bottom:1px solid rgba(96,165,250,.1)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card-glass{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease)}
.card-glass:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi);background:var(--panel-hi)}
.section-head{max-width:760px;margin-bottom:38px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;letter-spacing:2px;color:#8fb6e4;text-transform:uppercase;margin-bottom:12px}
.eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,#2f8bff,#35e0d0);box-shadow:0 0 12px rgba(53,224,208,.55)}
.section-head h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px}
/* ============ page hero ============ */
.page-hero{position:relative;overflow:hidden;padding:66px 0 60px;text-align:center;scroll-margin-top:110px}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.32;filter:saturate(1.15)}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(160deg,rgba(6,13,28,.96) 18%,rgba(6,13,28,.74) 58%,rgba(6,13,28,.94))}
.page-hero .wrap{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;background:rgba(53,224,208,.12);border:1px solid rgba(53,224,208,.34);color:#7ef0e3;font-size:12.5px;letter-spacing:1px;margin-bottom:18px}
.page-hero h1{font-size:clamp(28px,4vw,42px);letter-spacing:.4px;margin-bottom:14px}
.page-hero h1 span{background:linear-gradient(135deg,#5db0ff,#35e0d0);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:720px;margin:0 auto 26px;color:#b8cbe6;font-size:15.5px}
.hero-search{display:flex;align-items:center;gap:10px;max-width:620px;margin:0 auto 20px;background:rgba(12,26,48,.82);border:1px solid rgba(96,165,250,.3);border-radius:12px;padding:8px 8px 8px 16px;box-shadow:var(--shadow);transition:border-color var(--ease),box-shadow var(--ease)}
.hero-search:focus-within{border-color:var(--line-hi);box-shadow:0 0 0 4px rgba(47,139,255,.16),var(--shadow)}
.hero-search svg{color:#7f9bbe;flex-shrink:0;width:19px;height:19px}
.hero-search input{flex:1;background:transparent;border:0;outline:0;color:var(--text);font-size:14.5px;min-height:38px}
.hero-search input::placeholder{color:#6f88a8}
.hero-search .btn{padding:10px 20px;font-size:14px;min-height:40px}
.hero-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:28px}
.chip{display:inline-flex;align-items:center;min-height:38px;padding:6px 16px;border-radius:999px;font-size:13.5px;color:#bcd4f2;background:rgba(96,165,250,.1);border:1px solid rgba(96,165,250,.26);transition:transform var(--ease),background var(--ease),color var(--ease),border-color var(--ease)}
.chip:hover{transform:translateY(-2px);background:rgba(47,139,255,.22);border-color:var(--line-hi);color:#fff}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
/* ============ metrics ============ */
.metric{padding:22px 20px;border-radius:var(--radius-sm)}
.metric .metric-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.metric .card-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:rgba(47,139,255,.16);color:#7fc0ff;border:1px solid rgba(96,165,250,.28);flex-shrink:0}
.metric .metric-label{font-size:13px;color:#93a9c9;letter-spacing:.6px}
.metric strong{display:block;font-size:20px;color:#fff;margin-bottom:6px;letter-spacing:.3px}
.metric p{font-size:13.5px;color:var(--muted);line-height:1.7}
/* ============ channel cards ============ */
.channel-card{overflow:hidden;display:flex;flex-direction:column}
.channel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.channel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.channel-card:hover .channel-thumb img{transform:scale(1.05)}
.channel-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,28,.12),rgba(6,13,28,.72))}
.channel-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.channel-body h3{font-size:17px}
.channel-body p{font-size:14px;color:var(--muted)}
.channel-body .tag{align-self:flex-start;margin-top:auto}
/* ============ steps ============ */
.steps{display:grid;gap:16px}
.step{display:flex;gap:18px;padding:22px 24px;border-radius:var(--radius-sm);align-items:flex-start}
.step-num{flex-shrink:0;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-weight:700;font-size:16px;color:#04101f;background:linear-gradient(135deg,#2f8bff,#35e0d0);box-shadow:0 0 18px rgba(47,139,255,.45)}
.step h3{font-size:16.5px;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted)}
/* ============ compare ============ */
.compare{padding:26px 26px 28px;border-radius:var(--radius)}
.compare h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:16px}
.compare h3 .dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.compare-good h3 .dot{background:var(--accent);box-shadow:0 0 12px var(--accent)}
.compare-warn h3 .dot{background:var(--warn);box-shadow:0 0 12px rgba(255,182,72,.7)}
.compare li{position:relative;padding-left:24px;font-size:14px;color:#c3d5ee;margin-bottom:12px;line-height:1.75}
.compare li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:rgba(96,165,250,.55)}
.compare-good li::before{background:rgba(53,224,208,.72)}
.compare-warn li::before{background:rgba(255,182,72,.72)}
/* ============ device ============ */
.device-panel{display:grid;grid-template-columns:1.05fr 1fr;gap:34px;align-items:center}
.device-figure{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.device-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.device-figure .figure-cap{position:absolute;left:0;right:0;bottom:0;padding:14px 18px;font-size:13px;color:#d6e6ff;background:linear-gradient(180deg,transparent,rgba(4,10,22,.9))}
.device-list{display:grid;gap:14px}
.device-item{display:flex;gap:14px;padding:16px 18px;border-radius:var(--radius-sm)}
.device-item .card-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:rgba(53,224,208,.12);color:#6ff0e2;border:1px solid rgba(53,224,208,.3);flex-shrink:0}
.device-item h3{font-size:15.5px;margin-bottom:4px}
.device-item p{font-size:13.5px;color:var(--muted)}
/* ============ news list ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{display:flex;flex-direction:column;gap:10px;padding:22px;border-radius:var(--radius);min-height:180px}
.news-card h3{font-size:16px;line-height:1.55}
.news-card p{font-size:13.5px;color:var(--muted);flex:1}
.news-meta{font-size:12.5px;color:#7f9bbe;letter-spacing:.4px}
.news-card .tag{align-self:flex-start}
.empty-tip{text-align:center;color:var(--muted);font-size:14px;padding:26px;border:1px dashed rgba(96,165,250,.28);border-radius:var(--radius-sm);background:rgba(17,33,62,.4)}
/* ============ trust ============ */
.trust-card{padding:24px 22px;border-radius:var(--radius-sm);display:flex;flex-direction:column;gap:10px}
.trust-card .card-icon{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:rgba(47,139,255,.16);color:#7fc0ff;border:1px solid rgba(96,165,250,.28)}
.trust-card h3{font-size:16px}
.trust-card p{font-size:13.5px;color:var(--muted)}
/* ============ quick answer ============ */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}
.quick-card{display:flex;gap:12px;padding:18px;border-radius:var(--radius-sm);align-items:flex-start}
.quick-card .card-icon{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:rgba(53,224,208,.12);color:#6ff0e2;border:1px solid rgba(53,224,208,.3);flex-shrink:0}
.quick-card strong{display:block;font-size:14.5px;color:#fff;margin-bottom:4px}
.quick-card span{font-size:13px;color:var(--muted);line-height:1.65}
/* ============ faq ============ */
.faq-list{display:grid;gap:12px}
.faq-item{border-radius:var(--radius-sm);padding:0 22px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:14px;padding:18px 0;font-size:15.5px;font-weight:600;color:#eaf3ff;min-height:44px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-arrow{margin-left:auto;width:22px;height:22px;flex-shrink:0;color:#7fc0ff;transition:transform var(--ease)}
.faq-item[open] summary .faq-arrow{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 0 20px;font-size:14px;color:var(--muted);border-top:1px solid rgba(96,165,250,.12);padding-top:14px}
.faq-item:hover{border-color:var(--line-hi)}
/* ============ cta ============ */
.cta-panel{position:relative;overflow:hidden;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);background:rgba(10,23,48,.72)}
.cta-panel .cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;opacity:.2}
.cta-panel::after{content:"";position:absolute;inset:0;background:linear-gradient(130deg,rgba(6,13,28,.94),rgba(6,13,28,.72))}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:34px;padding:40px;align-items:center}
.cta-inner h2{font-size:clamp(22px,2.6vw,28px);margin-bottom:12px}
.cta-inner p{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.cta-points{display:grid;gap:10px}
.cta-points li{position:relative;padding-left:24px;font-size:14px;color:#c3d5ee}
.cta-points li::before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(53,224,208,.7)}
.device-form{background:rgba(12,26,48,.78);border:1px solid rgba(96,165,250,.26);border-radius:var(--radius);padding:24px}
.device-form label{display:block;font-size:13px;color:#9fbde0;margin-bottom:6px;letter-spacing:.4px}
.device-form .field{margin-bottom:14px}
.device-form input,.device-form select{width:100%;min-height:44px;border-radius:10px;background:rgba(255,255,255,.05);border:1px solid rgba(96,165,250,.22);color:var(--text);padding:10px 13px;font-size:14px;outline:0;transition:border-color var(--ease),background var(--ease)}
.device-form input::placeholder{color:#6f88a8}
.device-form input:focus,.device-form select:focus{border-color:var(--line-hi);background:rgba(255,255,255,.09)}
.device-form select option{background:#0a1730;color:#e8f1ff}
.device-form .btn{width:100%}
.form-tip{font-size:13px;color:#6ff0e2;min-height:20px;margin-top:10px}
/* ============ footer ============ */
.site-footer{background:linear-gradient(180deg,rgba(6,13,28,.4),rgba(4,10,22,.96));border-top:1px solid rgba(96,165,250,.16);padding:58px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer-brand strong{font-size:16px;color:#fff}
.site-footer p{font-size:13.5px;color:var(--muted);line-height:1.8;max-width:400px}
.footer-col h4{font-size:14px;color:#d6e6ff;letter-spacing:1px;margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.5px;color:#9fbde0}
.footer-col a:hover{color:#fff}
.footer-bottom{margin-top:36px;padding-top:20px;border-top:1px solid rgba(96,165,250,.14);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12.5px;color:#7f9bbe}
/* ============ responsive ============ */
@media (max-width:1024px){
 .nav-desktop{display:none}
 .nav-search{display:none}
 .nav-toggle{display:flex;margin-left:auto}
 .nav-cta{display:none}
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .grid-3,.news-grid,.quick-grid{grid-template-columns:repeat(2,1fr)}
 .device-panel,.cta-inner{grid-template-columns:1fr;gap:26px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
 .section{padding:60px 0}
 .page-hero{padding:52px 0 46px}
 .grid-2,.grid-3,.grid-4,.news-grid,.quick-grid{grid-template-columns:1fr}
 .brand-text small{display:none}
 .mainbar-inner{height:64px;gap:10px}
 .topbar-links{display:none}
 .hero-search{flex-wrap:wrap;padding:12px}
 .hero-search input{width:100%;flex:1 1 100%}
 .hero-search .btn{width:100%}
 .cta-inner{padding:26px}
 .footer-grid{grid-template-columns:1fr}
 .step{padding:18px}
 .compare{padding:22px}
}
@media (max-width:520px){
 .page-hero h1{font-size:26px}
 .section-head h2{font-size:21px}
 .btn{width:100%}
 .hero-actions .btn{width:100%}
 .metric strong{font-size:18px}
 .footer-bottom{flex-direction:column;gap:6px}
 .device-item{flex-direction:column}
}

/* roulang page: category2 */
:root{
 --bg:#060d1c;
 --bg-soft:#0a1730;
 --panel:rgba(17,33,62,.62);
 --panel-hi:rgba(24,46,84,.8);
 --line:rgba(96,165,250,.16);
 --line-hi:rgba(96,165,250,.45);
 --text:#e8f1ff;
 --muted:#93a9c9;
 --primary:#2f8bff;
 --accent:#35e0d0;
 --warn:#ffb648;
 --radius:14px;
 --radius-sm:10px;
 --shadow:0 18px 44px rgba(2,9,22,.6);
 --shadow-hover:0 26px 56px rgba(2,9,22,.74);
 --glow:0 0 22px rgba(47,139,255,.5);
 --ease:.22s ease;
 --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15.5px;
 line-height:1.78;
 color:var(--text);
 background:
  radial-gradient(1200px 620px at 6% -12%, rgba(47,139,255,.24), transparent 62%),
  radial-gradient(960px 520px at 100% 2%, rgba(53,224,208,.14), transparent 58%),
  var(--bg);
 -webkit-font-smoothing:antialiased;
 overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
img{max-width:100%;display:block;height:auto}
button,input,select{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.2px;line-height:1.35}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.icon-line{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.section{padding:84px 0;position:relative;scroll-margin-top:110px}
.section-alt{background:linear-gradient(180deg,rgba(10,23,48,.72),rgba(6,13,28,.24));border-top:1px solid rgba(96,165,250,.1);border-bottom:1px solid rgba(96,165,250,.1)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.section-head h2{font-size:29px}
.section-head .head-sub{color:var(--muted);font-size:14.5px;margin-top:8px;max-width:640px}
.head-line{display:flex;align-items:center;gap:12px}
.head-line i{display:block;width:34px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--primary),var(--accent));box-shadow:var(--glow)}
.card-glass{
 background:var(--panel);
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow);
 backdrop-filter:blur(14px);
 -webkit-backdrop-filter:blur(14px);
 transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.card-glass:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi);background:var(--panel-hi)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:12px 26px;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);min-height:44px}
.btn-primary{background:linear-gradient(135deg,#2f8bff,#35e0d0);color:#04101f;box-shadow:0 0 24px rgba(47,139,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(53,224,208,.58);color:#04101f}
.btn-ghost{background:rgba(96,165,250,.08);border-color:rgba(96,165,250,.4);color:#d6e6ff}
.btn-ghost:hover{background:rgba(96,165,250,.18);border-color:var(--line-hi);transform:translateY(-2px);color:#fff}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:4px 11px;border-radius:999px;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#a9cdfb}
.tag-accent{background:rgba(53,224,208,.14);border-color:rgba(53,224,208,.34);color:#6ff0e2}
/* header */
.site-header{position:sticky;top:0;z-index:1030}
.topbar{background:linear-gradient(90deg,rgba(47,139,255,.2),rgba(53,224,208,.12));border-bottom:1px solid rgba(96,165,250,.16);font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:40px;overflow:hidden}
.topbar-inner p{color:#c8dcf6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);flex-shrink:0}
.topbar-links{margin-left:auto;display:flex;gap:18px;flex-shrink:0}
.topbar-links a{color:#9fc4f0;font-size:12.5px}
.topbar-links a:hover{color:#fff}
.mainbar{background:rgba(7,17,35,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(96,165,250,.16);transition:box-shadow var(--ease)}
.site-header.scrolled .mainbar{box-shadow:0 12px 30px rgba(2,9,22,.62)}
.mainbar-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;color:#04101f;box-shadow:0 0 20px rgba(47,139,255,.5)}
.brand-text strong{display:block;font-size:15.5px;letter-spacing:.3px;color:#fff;line-height:1.3}
.brand-text small{display:block;font-size:11px;letter-spacing:1.6px;color:#7f9bbe}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#b9cbe6;transition:color var(--ease),background var(--ease),box-shadow var(--ease);white-space:nowrap}
.nav-link:hover{color:#fff;background:rgba(47,139,255,.14)}
.nav-link.active{color:#fff;background:rgba(47,139,255,.2);box-shadow:inset 0 0 0 1px rgba(96,165,250,.36)}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(96,165,250,.18);border-radius:10px;padding:8px 13px;min-width:186px;transition:border-color var(--ease),background var(--ease)}
.nav-search:focus-within{border-color:var(--line-hi);background:rgba(255,255,255,.1)}
.nav-search svg{flex-shrink:0;color:#7f9bbe}
.nav-search input{background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%}
.nav-search input::placeholder{color:#6f88a8}
.nav-cta{flex-shrink:0;padding:10px 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.28);color:#cfe2ff;align-items:center;justify-content:center;cursor:pointer}
.mobile-drawer{display:none;background:rgba(6,13,28,.98);border-top:1px solid var(--line);backdrop-filter:blur(18px)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:48px;padding:0 20px;color:#cfdcf0;border-bottom:1px solid rgba(96,165,250,.1);font-size:15px}
.mobile-drawer a.active{color:#fff;background:rgba(47,139,255,.16)}
.mobile-drawer .drawer-cta{margin:16px 20px;display:flex}
/* category hero */
.cat-hero{position:relative;overflow:hidden;padding:64px 0 76px;scroll-margin-top:110px}
.cat-hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.3;filter:saturate(1.1)}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(118deg,rgba(6,13,28,.95) 20%,rgba(6,13,28,.74) 60%,rgba(6,13,28,.93))}
.cat-hero .wrap{position:relative;z-index:2}
.cat-hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#8aa6c8;margin-bottom:18px}
.crumb a{color:#a9cdfb}
.crumb span{color:#5f7a9c}
.cat-hero h1{font-size:38px;line-height:1.28;margin-bottom:16px}
.cat-hero h1 em{font-style:normal;color:#6ff0e2}
.cat-hero-lead{color:#c3d6ef;font-size:15.5px;max-width:600px}
.cat-hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-visual{position:relative}
.hero-visual .shot{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--line-hi);box-shadow:var(--shadow-hover)}
.hero-visual .shot img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-visual .shot::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,28,.05) 30%,rgba(6,13,28,.8))}
.hero-visual .shot-cap{position:absolute;left:18px;right:18px;bottom:16px;z-index:2}
.hero-visual .shot-cap strong{display:block;font-size:15.5px;color:#fff}
.hero-visual .shot-cap span{font-size:12.5px;color:#a9cdfb}
.float-chip{position:absolute;top:-14px;left:-14px;padding:9px 14px;border-radius:12px;background:rgba(9,22,44,.92);border:1px solid var(--line-hi);box-shadow:var(--shadow);font-size:12.5px;color:#8ff4e8;display:flex;align-items:center;gap:8px}
/* metric board */
.metric-card{padding:24px 22px;position:relative;overflow:hidden}
.metric-card .m-num{font-size:30px;font-weight:700;color:#fff;line-height:1.1;letter-spacing:.5px}
.metric-card .m-num small{font-size:14px;font-weight:600;color:var(--accent);margin-left:4px}
.metric-card h3{font-size:15px;margin:10px 0 8px;color:#dbe9ff}
.metric-card p{font-size:13.5px;color:var(--muted);line-height:1.7}
.metric-card .m-dot{position:absolute;right:18px;top:20px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:rgba(47,139,255,.15);border:1px solid rgba(96,165,250,.3);color:#9fd0ff}
/* tip matrix */
.tip-card{padding:26px 24px;display:flex;flex-direction:column;gap:12px}
.tip-card .t-ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.32);color:#9fd0ff}
.tip-card h3{font-size:17px}
.tip-card p{font-size:14px;color:var(--muted)}
.tip-card .t-foot{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px;padding-top:6px}
/* compare */
.compare-card{padding:28px 26px}
.compare-card h3{font-size:17px;display:flex;align-items:center;gap:10px;margin-bottom:16px}
.compare-card h3 i{display:block;width:8px;height:8px;border-radius:50%}
.compare-card.weak h3 i{background:#ff7b7b;box-shadow:0 0 12px rgba(255,123,123,.6)}
.compare-card.strong h3 i{background:var(--accent);box-shadow:0 0 12px rgba(53,224,208,.6)}
.compare-card ul li{display:flex;gap:11px;padding:11px 0;border-bottom:1px dashed rgba(96,165,250,.16);font-size:14.2px;color:#cbdcf3}
.compare-card ul li:last-child{border-bottom:0}
.compare-card ul li svg{flex-shrink:0;margin-top:3px;width:17px;height:17px}
.compare-card.weak ul li svg{color:#ff9a9a}
.compare-card.strong ul li svg{color:var(--accent)}
/* timeline */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:6px}
.timeline::before{content:"";position:absolute;left:0;right:0;top:26px;height:1px;background:linear-gradient(90deg,rgba(47,139,255,.5),rgba(53,224,208,.5),rgba(47,139,255,.1))}
.tl-item{position:relative;padding-top:58px}
.tl-item .tl-dot{position:absolute;top:14px;left:2px;width:26px;height:26px;border-radius:50%;background:rgba(9,22,44,.96);border:1px solid var(--line-hi);display:grid;place-items:center;color:var(--accent);font-size:12px;font-weight:700;box-shadow:0 0 16px rgba(47,139,255,.35)}
.tl-item h3{font-size:16px;margin-bottom:8px}
.tl-item p{font-size:13.8px;color:var(--muted)}
.tl-item .tag{margin-top:12px}
/* news list */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{padding:22px 22px 20px;display:flex;flex-direction:column;gap:10px;min-height:180px}
.news-card h3{font-size:16px;line-height:1.5}
.news-card p{font-size:13.6px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .news-meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:10px;border-top:1px solid rgba(96,165,250,.14);font-size:12.5px;color:#7f9bbe}
.empty-note{padding:26px;border-radius:var(--radius);border:1px dashed rgba(96,165,250,.28);color:var(--muted);text-align:center;font-size:14px;background:rgba(96,165,250,.04)}
/* support */
.support-card{padding:26px 24px}
.support-card .s-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(53,224,208,.12);border:1px solid rgba(53,224,208,.3);color:#6ff0e2;margin-bottom:14px}
.support-card h3{font-size:16.5px;margin-bottom:8px}
.support-card p{font-size:14px;color:var(--muted)}
.support-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.support-list span{font-size:12.5px;color:#a9cdfb;padding:3px 10px;border-radius:999px;background:rgba(47,139,255,.12);border:1px solid rgba(96,165,250,.24)}
/* quick answers + faq */
.quick-wrap{padding:26px 24px;display:flex;flex-direction:column;gap:10px}
.quick-wrap .q-idx{font-size:12.5px;color:var(--accent);letter-spacing:1px}
.quick-wrap h3{font-size:16px}
.quick-wrap p{font-size:14px;color:var(--muted)}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:rgba(17,33,62,.5);overflow:hidden;transition:border-color var(--ease),background var(--ease)}
.faq-item[open]{border-color:var(--line-hi);background:rgba(24,46,84,.72)}
.faq-item summary{list-style:none;cursor:pointer;padding:17px 20px;font-size:15.2px;font-weight:600;color:#e4eeff;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:52px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;font-weight:400;color:var(--accent);line-height:1;transition:transform var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 20px 18px;font-size:14.2px;color:var(--muted)}
/* download */
.cta-panel{position:relative;overflow:hidden;border-radius:18px;border:1px solid var(--line-hi);background:linear-gradient(130deg,rgba(47,139,255,.18),rgba(53,224,208,.08) 60%,rgba(9,22,44,.9)),var(--bg-soft);box-shadow:var(--shadow-hover);padding:38px 34px}
.cta-panel::before{content:"";position:absolute;right:-80px;top:-90px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(53,224,208,.28),transparent 70%)}
.cta-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;position:relative;z-index:2}
.cta-panel h2{font-size:27px;margin-bottom:12px}
.cta-panel .cta-lead{color:#c3d6ef;font-size:14.6px;max-width:520px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.cta-points .tag{background:rgba(6,13,28,.5)}
.dev-box{background:rgba(6,13,28,.72);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.dev-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.dev-tab{flex:1 1 0;min-height:42px;padding:8px 10px;border-radius:9px;border:1px solid rgba(96,165,250,.26);background:rgba(96,165,250,.06);color:#b9cbe6;font-size:13.5px;cursor:pointer;transition:all var(--ease);white-space:nowrap}
.dev-tab:hover{color:#fff;border-color:var(--line-hi)}
.dev-tab.active{background:linear-gradient(135deg,rgba(47,139,255,.35),rgba(53,224,208,.25));color:#fff;border-color:var(--line-hi);box-shadow:0 0 18px rgba(47,139,255,.3)}
.dev-panel{display:none;font-size:14px;color:#cbdcf3}
.dev-panel.active{display:block}
.dev-panel h4{font-size:15px;color:#fff;margin-bottom:6px}
.dev-panel p{color:var(--muted);font-size:13.8px}
.dev-panel ul{margin-top:10px;display:flex;flex-direction:column;gap:7px}
.dev-panel ul li{font-size:13.5px;color:#b9cbe6;display:flex;gap:8px}
.dev-panel ul li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:8px;flex-shrink:0}
.dev-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
/* footer */
.site-footer{border-top:1px solid rgba(96,165,250,.18);background:linear-gradient(180deg,rgba(9,22,44,.6),rgba(4,10,22,.95));padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.footer-brand strong{font-size:16px;color:#fff}
.site-footer p{font-size:13.8px;color:var(--muted);max-width:420px}
.footer-col h4{font-size:14.5px;color:#dbe9ff;margin-bottom:14px;letter-spacing:.6px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:13.8px;color:#9db3d2;transition:color var(--ease),padding-left var(--ease)}
.footer-col ul a:hover{color:#6ff0e2;padding-left:4px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:38px;padding-top:18px;border-top:1px solid rgba(96,165,250,.14);font-size:13px;color:#7f9bbe}
/* responsive */
@media (max-width:1024px){
 .nav-search{display:none}
 .cat-hero-grid{grid-template-columns:1fr;gap:34px}
 .cat-hero h1{font-size:32px}
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .news-grid{grid-template-columns:repeat(2,1fr)}
 .timeline{grid-template-columns:repeat(2,1fr);gap:26px}
 .timeline::before{display:none}
 .cta-grid{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
 .nav-desktop{display:none}
 .nav-cta{display:none}
 .nav-toggle{display:flex;margin-left:auto}
 .mainbar-inner{height:66px}
}
@media (max-width:768px){
 .section{padding:60px 0}
 .grid-3,.grid-2{grid-template-columns:1fr}
 .section-head h2{font-size:24px}
 .cat-hero{padding:46px 0 56px}
 .cat-hero h1{font-size:27px}
 .cta-panel{padding:28px 22px}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .brand-text strong{font-size:14px}
}
@media (max-width:520px){
 .grid-4{grid-template-columns:1fr}
 .news-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:1fr}
 .topbar-links{display:none}
 .brand-text small{display:none}
 .cat-hero h1{font-size:24px}
 .hero-visual .shot img{aspect-ratio:16/12}
 .float-chip{left:0;top:-12px}
 .btn{width:100%}
 .cat-hero-actions .btn,.dev-actions .btn{width:100%}
 .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category3 */
:root{
  --bg:#060d1c;
  --bg-soft:#0a1730;
  --panel:rgba(17,33,62,.62);
  --panel-hi:rgba(24,46,84,.8);
  --line:rgba(96,165,250,.16);
  --line-hi:rgba(96,165,250,.45);
  --text:#e8f1ff;
  --muted:#93a9c9;
  --primary:#2f8bff;
  --accent:#35e0d0;
  --warn:#ffb648;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 18px 44px rgba(2,9,22,.6);
  --shadow-hover:0 26px 56px rgba(2,9,22,.74);
  --glow:0 0 22px rgba(47,139,255,.5);
  --ease:.22s ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15.5px;
  line-height:1.78;
  color:var(--text);
  background:
    radial-gradient(1200px 620px at 6% -12%, rgba(47,139,255,.24), transparent 62%),
    radial-gradient(960px 520px at 100% 2%, rgba(53,224,208,.14), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
img{max-width:100%;display:block;height:auto}
button,input{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:78px 0;position:relative;scroll-margin-top:118px}
.section-alt{background:linear-gradient(180deg,rgba(10,23,48,.72),rgba(6,13,28,.24));border-top:1px solid rgba(96,165,250,.1);border-bottom:1px solid rgba(96,165,250,.1)}
.section-head{max-width:780px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.16em;color:var(--accent);font-weight:600}
.section-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.section-title{font-size:29px;line-height:1.36;margin:10px 0 12px;color:#fff}
.section-desc{color:var(--muted);font-size:15px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card-glass{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
}
.card-glass:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi);background:var(--panel-hi)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:12px 26px;border:1px solid transparent;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease);min-height:44px}
.btn-primary{background:linear-gradient(135deg,#2f8bff,#35e0d0);color:#04101f;box-shadow:0 0 24px rgba(47,139,255,.45)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(53,224,208,.58);color:#04101f}
.btn-ghost{background:rgba(96,165,250,.08);border-color:rgba(96,165,250,.4);color:#d6e6ff}
.btn-ghost:hover{background:rgba(96,165,250,.18);border-color:var(--line-hi);transform:translateY(-2px);color:#fff}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;padding:4px 11px;border-radius:999px;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:#a9cdfb}
.tag-accent{background:rgba(53,224,208,.14);border-color:rgba(53,224,208,.34);color:#6ff0e2}
.tag-warn{background:rgba(255,182,72,.14);border-color:rgba(255,182,72,.34);color:#ffcd80}
.icon-line{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:1030}
.topbar{background:linear-gradient(90deg,rgba(47,139,255,.2),rgba(53,224,208,.12));border-bottom:1px solid rgba(96,165,250,.16);font-size:13px}
.topbar-inner{display:flex;align-items:center;gap:12px;height:40px;overflow:hidden}
.topbar-inner p{color:#c8dcf6;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent);flex-shrink:0}
.topbar-links{margin-left:auto;display:flex;gap:18px;flex-shrink:0}
.topbar-links a{color:#9fc4f0;font-size:12.5px}
.topbar-links a:hover{color:#fff}
.mainbar{background:rgba(7,17,35,.86);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(96,165,250,.16);transition:box-shadow var(--ease)}
.site-header.scrolled .mainbar{box-shadow:0 12px 30px rgba(2,9,22,.62)}
.mainbar-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,#2f8bff,#35e0d0);display:grid;place-items:center;color:#04101f;box-shadow:0 0 20px rgba(47,139,255,.5)}
.brand-text strong{display:block;font-size:15.5px;letter-spacing:.3px;color:#fff;line-height:1.3}
.brand-text small{display:block;font-size:11px;letter-spacing:1.6px;color:#7f9bbe}
.nav-desktop{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{position:relative;padding:9px 14px;border-radius:9px;font-size:14.5px;color:#b9cbe6;transition:color var(--ease),background var(--ease),box-shadow var(--ease);white-space:nowrap}
.nav-link:hover{color:#fff;background:rgba(47,139,255,.14)}
.nav-link.active{color:#fff;background:rgba(47,139,255,.2);box-shadow:inset 0 0 0 1px rgba(96,165,250,.36)}
.nav-search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.06);border:1px solid rgba(96,165,250,.18);border-radius:10px;padding:8px 13px;min-width:186px;transition:border-color var(--ease),background var(--ease)}
.nav-search:focus-within{border-color:var(--line-hi);background:rgba(255,255,255,.1)}
.nav-search svg{flex-shrink:0;color:#7f9bbe}
.nav-search input{background:transparent;border:0;outline:0;color:var(--text);font-size:13.5px;width:100%}
.nav-search input::placeholder{color:#6f88a8}
.nav-cta{flex-shrink:0;padding:10px 20px;font-size:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:rgba(96,165,250,.12);border:1px solid rgba(96,165,250,.28);color:#cfe2ff;align-items:center;justify-content:center;cursor:pointer}
.mobile-drawer{display:none;background:rgba(6,13,28,.98);border-top:1px solid var(--line);backdrop-filter:blur(18px)}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:flex;align-items:center;min-height:48px;padding:0 20px;color:#cfdcf0;border-bottom:1px solid rgba(96,165,250,.1);font-size:15px}
.mobile-drawer a.active{color:#fff;background:rgba(47,139,255,.16)}
.mobile-drawer .drawer-cta{margin:16px 20px;display:flex}

/* 分类首屏：斜切色块 */
.page-hero{position:relative;overflow:hidden;padding:66px 0 108px;background:linear-gradient(120deg,#0b2350 0%,#0a1730 52%,#071628 100%);clip-path:polygon(0 0,100% 0,100% 86%,0 100%)}
.page-hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;opacity:.2;filter:saturate(1.15)}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(6,13,28,.94) 18%,rgba(6,13,28,.66) 58%,rgba(6,13,28,.9))}
.page-hero .wrap{position:relative;z-index:2}
.hero-inner{max-width:820px}
.hero-crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#8fb2d8;margin-bottom:18px}
.hero-crumb a:hover{color:var(--accent)}
.hero-crumb span{color:#5d7ba3}
.page-hero h1{font-size:clamp(27px,3.4vw,42px);line-height:1.3;color:#fff;margin-bottom:16px;letter-spacing:.3px}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.hero-sub{color:#c2d6ef;font-size:15.5px;max-width:700px;line-height:1.85}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* 指标看板 */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric-card{padding:22px 20px;position:relative;overflow:hidden}
.metric-card::after{content:"";position:absolute;right:-24px;top:-24px;width:72px;height:72px;border-radius:50%;background:rgba(47,139,255,.16);filter:blur(10px)}
.metric-num{font-size:27px;font-weight:700;color:#fff;line-height:1.2;letter-spacing:.4px}
.metric-num small{font-size:13.5px;color:var(--accent);font-weight:600;margin-left:4px}
.metric-label{color:var(--muted);font-size:13px;margin-top:8px}

/* 更新要点 */
.upd-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.upd-card{padding:26px;display:flex;gap:16px;align-items:flex-start}
.upd-ico{width:44px;height:44px;flex-shrink:0;border-radius:12px;display:grid;place-items:center;background:rgba(47,139,255,.16);border:1px solid rgba(96,165,250,.3);color:var(--accent)}
.upd-body h3{font-size:17px;color:#fff;margin-bottom:6px}
.upd-body p{color:var(--muted);font-size:14.2px;line-height:1.75;margin-bottom:10px}

/* 结果对比 */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-card{padding:28px}
.compare-card h3{font-size:17px;display:flex;align-items:center;gap:9px;margin-bottom:18px}
.dot-before{width:9px;height:9px;border-radius:50%;background:#7f8fa8;box-shadow:0 0 10px rgba(127,143,168,.7)}
.dot-after{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.compare-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(96,165,250,.16);font-size:14.2px}
.compare-row:last-child{border-bottom:0}
.compare-row b{color:#fff;font-weight:600}
.compare-row span{color:var(--muted)}
.compare-card.hot{border-color:rgba(53,224,208,.36);background:rgba(20,52,74,.55)}
.compare-card.hot .compare-row b{color:var(--accent)}

/* 时间线 */
.timeline{position:relative;padding-left:28px;margin-top:8px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,rgba(47,139,255,.7),rgba(53,224,208,.25),transparent)}
.tl-item{position:relative;padding:0 0 26px 6px}
.tl-item::before{content:"";position:absolute;left:-27px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--bg);border:2px solid var(--primary);box-shadow:0 0 12px rgba(47,139,255,.6)}
.tl-item:first-child::before{background:var(--accent);border-color:var(--accent);box-shadow:0 0 14px var(--accent)}
.tl-ver{display:inline-flex;align-items:center;gap:10px;font-size:15.5px;font-weight:700;color:#fff}
.tl-date{font-size:12.5px;color:#7f9bbe;font-weight:400}
.tl-desc{color:var(--muted);font-size:14.2px;margin-top:4px}

/* 升级流程 */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.step-card{padding:24px 20px;position:relative;overflow:hidden}
.step-num{font-size:32px;font-weight:800;line-height:1;background:linear-gradient(135deg,#2f8bff,#35e0d0);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.step-card h3{font-size:16px;color:#fff;margin-bottom:7px}
.step-card p{font-size:13.8px;color:var(--muted);line-height:1.7}

/* 保障图文 */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.split-figure{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.split-figure img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s ease}
.split-figure:hover img{transform:scale(1.04)}
.split-figure figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 20px 16px;font-size:13px;color:#cfe4ff;background:linear-gradient(180deg,transparent,rgba(4,10,22,.9))}
.guard-list{margin-top:20px;display:grid;gap:12px}
.guard-item{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:12px;background:rgba(96,165,250,.07);border:1px solid rgba(96,165,250,.16)}
.guard-item svg{color:var(--accent);flex-shrink:0;margin-top:2px}
.guard-item strong{display:block;color:#fff;font-size:14.6px;margin-bottom:2px}
.guard-item span{color:var(--muted);font-size:13.6px;line-height:1.7}

/* 资讯列表 */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{padding:24px;display:flex;flex-direction:column;gap:10px;height:100%}
.post-card h3{font-size:16.5px;line-height:1.55;color:#fff}
.post-card h3 a:hover{color:var(--accent)}
.post-card p{font-size:13.8px;color:var(--muted);line-height:1.72;flex:1}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:#7f9bbe;border-top:1px solid rgba(96,165,250,.14);padding-top:12px;margin-top:4px}
.empty-note{padding:26px;border-radius:var(--radius);border:1px dashed rgba(96,165,250,.3);color:var(--muted);text-align:center;background:rgba(17,33,62,.4)}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{border-radius:var(--radius);border:1px solid var(--line);background:var(--panel);overflow:hidden;transition:border-color var(--ease),background var(--ease)}
.faq-item[open]{border-color:var(--line-hi);background:var(--panel-hi)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 52px 18px 22px;position:relative;font-size:15.5px;font-weight:600;color:#fff}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--accent);transition:transform var(--ease)}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-body{padding:0 22px 20px;color:var(--muted);font-size:14.2px;line-height:1.8}

/* 转化区 */
.cta-band{background:linear-gradient(135deg,rgba(24,64,124,.72),rgba(14,44,66,.78));border:1px solid var(--line-hi);border-radius:18px;padding:40px;display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center;box-shadow:var(--shadow)}
.cta-band h2{font-size:26px;color:#fff;line-height:1.4;margin-bottom:12px}
.cta-band p{color:#c2d6ef;font-size:14.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.check-box{background:rgba(6,13,28,.55);border:1px solid rgba(96,165,250,.24);border-radius:14px;padding:22px}
.check-box h3{font-size:15.5px;color:#fff;margin-bottom:6px}
.check-box p{font-size:13.2px;color:var(--muted);margin-bottom:14px}
.check-form{display:flex;gap:10px}
.check-form input{flex:1;min-width:0;min-height:44px;padding:11px 14px;border-radius:10px;border:1px solid rgba(96,165,250,.28);background:rgba(255,255,255,.05);color:var(--text);font-size:14px;transition:border-color var(--ease),background var(--ease)}
.check-form input::placeholder{color:#6f88a8}
.check-form input:focus{outline:none;border-color:var(--line-hi);background:rgba(255,255,255,.09)}
.check-hint{font-size:12.5px;color:#7f9bbe;margin-top:10px}

/* 页脚 */
.site-footer{background:rgba(4,10,22,.86);border-top:1px solid rgba(96,165,250,.16);padding:56px 0 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:34px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand strong{color:#fff;font-size:15.5px}
.site-footer p{color:var(--muted);font-size:13.8px;line-height:1.8;max-width:420px}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:14px;letter-spacing:.4px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:13.8px;transition:color var(--ease),padding-left var(--ease)}
.footer-col a:hover{color:var(--accent);padding-left:3px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;border-top:1px solid rgba(96,165,250,.14);margin-top:38px;padding:18px 0;color:#7f9bbe;font-size:12.8px}

/* 响应式 */
@media (max-width:1024px){
  .metric-grid{grid-template-columns:repeat(2,1fr)}
  .step-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:26px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer p{max-width:none}
}
@media (max-width:992px){
  .nav-desktop,.nav-search{display:none}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .mainbar-inner{height:64px}
  .topbar-links{display:none}
  .section{padding:64px 0}
  .page-hero{padding:52px 0 92px}
}
@media (max-width:768px){
  body{font-size:15px}
  .upd-grid,.grid-2,.grid-3,.compare-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .section-title{font-size:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
  .hero-actions .btn{width:100%}
  .check-form{flex-direction:column}
  .check-form .btn{width:100%}
}
@media (max-width:520px){
  .metric-grid{grid-template-columns:1fr}
  .step-grid{grid-template-columns:1fr}
  .page-hero{padding:42px 0 78px}
  .brand-text small{display:none}
  .metric-num{font-size:24px}
  .upd-card{padding:20px;gap:12px}
  .compare-card,.post-card{padding:20px}
  .cta-band{padding:24px;border-radius:14px}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}