/* roulang page: index */
:root{
  --bg:#050a15;
  --bg-soft:#081226;
  --panel:rgba(16,28,52,.72);
  --panel-solid:#0d1a33;
  --line:rgba(88,140,255,.18);
  --line-strong:rgba(96,152,255,.42);
  --ink:#e9f0ff;
  --ink-2:#a9bbdd;
  --ink-3:#7c90b8;
  --brand:#3b7cff;
  --brand-2:#22d3ee;
  --warm:#ffb648;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px rgba(2,10,30,.55);
  --space:74px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(1200px 620px at 12% -12%, rgba(59,124,255,.22), transparent 62%),
    radial-gradient(900px 520px at 92% -4%, rgba(34,211,238,.13), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand-2)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit}
::selection{background:rgba(59,124,255,.35);color:#fff}

.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,12,26,.84);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-nav{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.4px;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04101f;font-size:17px;font-weight:800;
  box-shadow:0 8px 24px rgba(59,124,255,.45);
}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:1.6px;line-height:1.1}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{padding:8px 15px;border-radius:999px;font-size:15px;color:var(--ink-2);white-space:nowrap;transition:background .2s,color .2s,box-shadow .2s}
.nav-links a:hover{color:#fff;background:rgba(59,124,255,.15)}
.nav-links a.active{
  color:#fff;
  background:linear-gradient(135deg,rgba(59,124,255,.95),rgba(34,211,238,.72));
  box-shadow:0 8px 22px rgba(59,124,255,.36);
}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:196px;padding:9px 16px 9px 36px;border-radius:999px;
  border:1px solid var(--line);background:rgba(12,22,42,.92);
  color:var(--ink);font-size:14px;outline:none;
  transition:width .25s,border-color .2s,box-shadow .2s;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{width:226px;border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(59,124,255,.2)}
.nav-search i{position:absolute;left:13px;color:var(--ink-3);font-size:13px;pointer-events:none}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#3b7cff,#22d3ee);
  color:#04101f;
  box-shadow:0 10px 26px rgba(59,124,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(59,124,255,.52);color:#04101f}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:rgba(19,32,58,.55)}
.btn-ghost:hover{background:rgba(59,124,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px}

/* ---------- hero ---------- */
.site-hero{position:relative;padding:82px 0 70px;overflow:hidden;border-bottom:1px solid var(--line)}
.site-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(88,140,255,.075) 1px,transparent 1px),
    linear-gradient(90deg,rgba(88,140,255,.075) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%,#000 8%,transparent 74%);
  mask-image:radial-gradient(circle at 50% 26%,#000 8%,transparent 74%);
}
.hero-inner{position:relative;max-width:880px}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:22px}
.tag-pill{
  padding:6px 14px;border-radius:999px;font-size:13px;
  color:#9fd0ff;border:1px solid rgba(96,164,255,.35);
  background:rgba(35,68,132,.35);
}
.tag-pill.hot{color:var(--warm);border-color:rgba(255,182,72,.4);background:rgba(88,58,12,.35)}
.hero-title{
  font-size:clamp(28px,3.7vw,45px);
  line-height:1.3;font-weight:800;letter-spacing:.5px;
}
.glow-text{
  background:linear-gradient(118deg,#8dbbff,#22d3ee 58%,#9df0ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{margin-top:22px;max-width:790px;color:var(--ink-2);font-size:16.5px;line-height:1.95}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:44px}
.stat-card{
  padding:20px 22px;border-radius:16px;
  background:rgba(16,28,52,.66);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  min-width:0;
}
.stat-card strong{display:block;font-size:24px;font-weight:800;color:#bfe0ff;letter-spacing:.5px}
.stat-card span{display:block;font-size:13.5px;color:var(--ink-3);margin-top:4px}

/* ---------- sections ---------- */
.site-section{padding:var(--space) 0;position:relative}
.site-section.alt{
  background:linear-gradient(180deg,rgba(10,20,40,.72),rgba(6,12,26,.24));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:780px;margin-bottom:38px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2.4px;color:#7fb4ff;
  margin-bottom:12px;text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand),transparent);display:inline-block}
.section-title{font-size:clamp(22px,2.6vw,31px);font-weight:700;line-height:1.4;letter-spacing:.3px}
.section-desc{margin-top:14px;color:var(--ink-2);font-size:15.5px;line-height:1.9}

/* ---------- grids & cards ---------- */
.grid-2,.grid-3,.grid-4{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.glass-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  transition:transform .25s,border-color .25s,box-shadow .25s;
  min-width:0;
}
.glass-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.card-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  font-size:19px;color:#8fc0ff;margin-bottom:16px;
  background:rgba(59,124,255,.16);
  border:1px solid rgba(96,164,255,.32);
}
.glass-card h3{font-size:17.5px;font-weight:700;margin-bottom:10px;line-height:1.5}
.glass-card p{color:var(--ink-2);font-size:14.5px;line-height:1.85}
.card-tag{display:inline-block;margin-top:16px;padding:4px 12px;border-radius:999px;font-size:12px;color:#8fd8f0;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.28)}

/* ---------- download ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;flex-direction:column;gap:14px;
  padding:28px;border-radius:20px;min-width:0;
  background:linear-gradient(160deg,rgba(28,48,92,.86),rgba(11,21,40,.92));
  border:1px solid var(--line-strong);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.dl-card:hover{transform:translateY(-5px);border-color:rgba(120,190,255,.65);box-shadow:0 22px 46px rgba(21,58,132,.5)}
.dl-icon{
  width:54px;height:54px;border-radius:15px;display:grid;place-items:center;
  font-size:23px;color:#a9d6ff;
  background:rgba(59,124,255,.2);border:1px solid rgba(96,164,255,.4);
}
.dl-card h3{font-size:18px;font-weight:700}
.dl-card p{color:var(--ink-2);font-size:14.5px;line-height:1.8;flex:1 1 auto}
.dl-card .btn{width:100%}
.dl-note{margin-top:22px;font-size:13.5px;color:var(--ink-3);line-height:1.8}

/* ---------- flow steps ---------- */
.flow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.step{
  position:relative;padding:22px 18px;border-radius:16px;min-width:0;
  border:1px solid var(--line);background:rgba(13,24,46,.72);
  transition:border-color .25s,transform .25s;
}
.step:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.step-num{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  font-size:13px;font-weight:800;color:#04101f;margin-bottom:13px;
  background:linear-gradient(135deg,#3b7cff,#22d3ee);
}
.step h3{font-size:15.5px;font-weight:700;margin-bottom:8px}
.step p{font-size:13.8px;color:var(--ink-2);line-height:1.8}

/* ---------- split demo ---------- */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.panel-box{
  padding:28px;border-radius:var(--radius);min-width:0;
  border:1px solid var(--line);background:rgba(13,24,46,.7);
}
.panel-box h3{font-size:17px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.panel-box h3 i{color:#7fb4ff;font-size:15px}
.check-list li{
  position:relative;padding-left:22px;margin-bottom:11px;
  font-size:14.5px;color:var(--ink-2);line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:3px;
  background:linear-gradient(135deg,#3b7cff,#22d3ee);
}
.warn-box{
  border-color:rgba(255,182,72,.32);
  background:linear-gradient(160deg,rgba(64,44,14,.5),rgba(20,16,10,.6));
}
.warn-box h3 i{color:var(--warn)}
.warn-box .check-list li::before{background:linear-gradient(135deg,#ffb648,#ff8a3d)}

/* ---------- table ---------- */
.table-wrap{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:rgba(12,22,42,.6)}
.data-table{width:100%;border-collapse:collapse;min-width:640px}
.data-table th,.data-table td{padding:15px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid rgba(88,140,255,.13);vertical-align:top}
.data-table th{color:#9fd0ff;font-weight:600;font-size:13.5px;letter-spacing:.5px;background:rgba(24,44,82,.6);white-space:nowrap}
.data-table td{color:var(--ink-2);line-height:1.8}
.data-table tr:last-child td{border-bottom:none}
.data-table tbody tr:hover td{background:rgba(59,124,255,.07)}

/* ---------- tags wall ---------- */
.tag-wall{display:flex;flex-wrap:wrap;gap:12px}
.tag-item{
  padding:10px 18px;border-radius:999px;font-size:14px;color:var(--ink-2);
  border:1px solid var(--line);background:rgba(14,26,48,.7);
  transition:border-color .2s,color .2s,background .2s,transform .2s;
}
.tag-item:hover{color:#fff;border-color:var(--line-strong);background:rgba(59,124,255,.18);transform:translateY(-2px)}

/* ---------- channel / category entry ---------- */
.channel-card{
  display:flex;align-items:center;gap:20px;
  padding:26px 28px;border-radius:20px;min-width:0;
  border:1px solid var(--line-strong);
  background:linear-gradient(135deg,rgba(29,52,98,.85),rgba(12,22,42,.9));
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(20,56,128,.5);border-color:rgba(120,190,255,.7);color:inherit}
.channel-icon{
  width:58px;height:58px;flex:0 0 58px;border-radius:16px;display:grid;place-items:center;
  font-size:23px;color:#a9d6ff;background:rgba(59,124,255,.22);
  border:1px solid rgba(96,164,255,.42);
}
.channel-body{min-width:0}
.channel-body h3{font-size:18px;font-weight:700;margin-bottom:7px}
.channel-body p{font-size:14.5px;color:var(--ink-2);line-height:1.8}
.channel-arrow{margin-left:auto;color:#7fb4ff;font-size:17px;flex:0 0 auto}

/* ---------- news ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,1.85fr) minmax(0,1fr);gap:26px;align-items:start}
.news-item{
  display:block;padding:20px 22px;border-radius:16px;margin-bottom:14px;min-width:0;
  border:1px solid var(--line);background:rgba(12,22,42,.62);
  transition:border-color .22s,background .22s,transform .22s;
}
.news-item:hover{border-color:var(--line-strong);background:rgba(19,34,64,.82);transform:translateX(4px);color:inherit}
.news-title{font-size:16.5px;font-weight:600;line-height:1.6;margin-bottom:8px}
.news-summary{
  color:var(--ink-2);font-size:14.2px;line-height:1.78;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{margin-top:12px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:var(--ink-3)}
.news-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--ink-3);display:inline-block}
.side-box{
  padding:24px;border-radius:18px;min-width:0;
  border:1px solid var(--line);background:rgba(13,24,46,.72);
}
.side-box h3{font-size:16px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.side-box h3 i{color:#7fb4ff;font-size:14px}
.side-item{display:block;padding:12px 0;border-bottom:1px dashed rgba(88,140,255,.16);font-size:14.2px;color:var(--ink-2);line-height:1.7;transition:color .2s,padding-left .2s}
.side-item:last-child{border-bottom:none}
.side-item:hover{color:#bfe0ff;padding-left:5px}
.empty-tip{padding:26px;border-radius:16px;border:1px dashed var(--line-strong);color:var(--ink-3);font-size:14.5px;text-align:center}
.search-tip{display:none;margin-bottom:14px;padding:12px 16px;border-radius:12px;font-size:14px;color:var(--warm);background:rgba(88,58,12,.4);border:1px solid rgba(255,182,72,.3)}

/* ---------- terms ---------- */
.term-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.term-item{padding:20px;border-radius:14px;border:1px solid var(--line);background:rgba(13,24,46,.66);min-width:0}
.term-item strong{display:block;font-size:15.5px;color:#bfe0ff;margin-bottom:8px}
.term-item span{font-size:13.8px;color:var(--ink-2);line-height:1.8}

/* ---------- guarantee strip ---------- */
.guard-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  padding:24px;border-radius:18px;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(24,44,82,.72),rgba(10,20,38,.72));
}
.guard-item{display:flex;align-items:center;gap:12px;min-width:0;font-size:14.5px;color:var(--ink-2)}
.guard-item i{color:#7fb4ff;font-size:17px;flex:0 0 auto}

/* ---------- faq ---------- */
.faq-item{
  border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
  background:rgba(13,24,46,.66);overflow:hidden;
}
.faq-item summary{
  padding:18px 22px;font-size:15.8px;font-weight:600;cursor:pointer;
  list-style:none;display:flex;align-items:center;gap:12px;
  transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;color:#7fb4ff;font-size:19px;line-height:1;transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item summary:hover{color:#bfe0ff}
.faq-item p{padding:0 22px 20px;color:var(--ink-2);font-size:14.6px;line-height:1.9}

/* ---------- cta ---------- */
.cta-band{
  position:relative;padding:52px 40px;border-radius:24px;overflow:hidden;
  border:1px solid var(--line-strong);
  background:
    radial-gradient(600px 320px at 12% 0%,rgba(59,124,255,.34),transparent 65%),
    linear-gradient(140deg,rgba(20,38,72,.94),rgba(8,16,32,.96));
  text-align:center;
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;line-height:1.45}
.cta-band p{margin:16px auto 0;max-width:700px;color:var(--ink-2);font-size:15.2px;line-height:1.9}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,17,34,.94),rgba(4,8,18,1));
  padding:56px 0 26px;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-desc{color:var(--ink-3);font-size:14px;line-height:1.9;max-width:430px}
.footer-col h4{font-size:14px;font-weight:700;color:#bfe0ff;letter-spacing:1px;margin-bottom:14px}
.footer-col a,.footer-col span{display:block;color:var(--ink-3);font-size:14px;line-height:1.9;margin-bottom:9px;transition:color .2s,padding-left .2s}
.footer-col a:hover{color:#bfe0ff;padding-left:4px}
.friend-area{margin-top:34px;padding-top:26px;border-top:1px solid rgba(88,140,255,.14)}
.friend-area h4{font-size:14px;font-weight:700;color:#bfe0ff;letter-spacing:1px;margin-bottom:14px}
.friend-links{display:flex;flex-wrap:wrap;gap:10px 22px}
.friend-links a{font-size:13.5px;color:var(--ink-3)}
.friend-links a:hover{color:#8fd8f0}
.footer-bottom{
  margin-top:30px;padding-top:20px;border-top:1px solid rgba(88,140,255,.14);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--space:60px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .term-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guard-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:26px}
  .news-layout{grid-template-columns:1fr}
}
@media (max-width:900px){
  .nav-search{display:none}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .site-nav{flex-wrap:wrap;min-height:auto;padding:12px 0;gap:12px}
  .nav-links{order:3;width:100%;margin-left:0;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-tools{margin-left:auto}
  .hero-stats{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero-lead{font-size:15.6px}
  .cta-band{padding:38px 22px}
  .channel-card{flex-wrap:wrap}
  .channel-arrow{display:none}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  :root{--space:48px}
  .dl-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .term-grid{grid-template-columns:1fr}
  .guard-strip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .hero-actions .btn{width:100%}
  .glass-card{padding:22px}
  .brand{font-size:16.5px}
  .brand-mark{width:34px;height:34px;border-radius:10px;font-size:15px}
}

/* roulang page: article */
:root{
  --bg:#050a15;
  --bg-soft:#081226;
  --panel:rgba(16,28,52,.72);
  --panel-solid:#0d1a33;
  --line:rgba(88,140,255,.18);
  --line-strong:rgba(96,152,255,.42);
  --ink:#e9f0ff;
  --ink-2:#a9bbdd;
  --ink-3:#7c90b8;
  --brand:#3b7cff;
  --brand-2:#22d3ee;
  --warm:#ffb648;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px rgba(2,10,30,.55);
  --space:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(1200px 620px at 12% -12%, rgba(59,124,255,.22), transparent 62%),
    radial-gradient(900px 520px at 92% -4%, rgba(34,211,238,.13), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand-2)}
button{font:inherit}
h1,h2,h3,h4{margin:0;line-height:1.4;font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,12,26,.84);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-nav{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.4px;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04101f;font-size:17px;font-weight:800;
  box-shadow:0 8px 24px rgba(59,124,255,.45);
  flex:0 0 auto;
}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:1.6px;line-height:1.1}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{padding:8px 15px;border-radius:999px;font-size:15px;color:var(--ink-2);white-space:nowrap;transition:background .2s,color .2s,box-shadow .2s}
.nav-links a:hover{color:#fff;background:rgba(59,124,255,.15)}
.nav-links a.active{
  color:#fff;
  background:linear-gradient(135deg,rgba(59,124,255,.95),rgba(34,211,238,.72));
  box-shadow:0 8px 22px rgba(59,124,255,.36);
}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:196px;padding:9px 16px 9px 36px;border-radius:999px;
  border:1px solid var(--line);background:rgba(12,22,42,.92);
  color:var(--ink);font-size:14px;outline:none;margin:0;
  transition:width .25s,border-color .2s,box-shadow .2s;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{width:226px;border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(59,124,255,.2)}
.nav-search i{position:absolute;left:13px;color:var(--ink-3);font-size:13px;pointer-events:none}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;text-align:center;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#3b7cff,#22d3ee);
  color:#04101f;
  box-shadow:0 10px 26px rgba(59,124,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(59,124,255,.52);color:#04101f}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:rgba(19,32,58,.55)}
.btn-ghost:hover{background:rgba(59,124,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px}
/* ---------- generic section ---------- */
.site-section{padding:var(--space) 0;position:relative}
.site-section.alt{
  background:linear-gradient(180deg,rgba(10,20,40,.72),rgba(6,12,26,.24));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:800px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2.2px;color:#7fb4ff;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand),transparent);display:inline-block}
.section-title{font-size:clamp(21px,2.5vw,30px);letter-spacing:.3px}
.section-desc{margin-top:14px;color:var(--ink-2);font-size:15.5px;line-height:1.9}
/* ---------- grids ---------- */
.grid-2,.grid-3{display:grid;gap:20px;min-width:0}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-2 > *,.grid-3 > *{min-width:0}
.info-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transition:transform .2s,border-color .2s,box-shadow .2s;
  min-width:0;
}
.info-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 20px 44px rgba(3,12,32,.5)}
.info-card h3{font-size:17.5px;margin-bottom:10px;color:#e7f0ff;display:flex;align-items:center;gap:9px}
.info-card h3 i{color:var(--brand-2);font-size:15px}
.info-card p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.9}
/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  padding:54px 0 44px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(88,140,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(88,140,255,.07) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(circle at 30% 18%,#000 6%,transparent 70%);
  mask-image:radial-gradient(circle at 30% 18%,#000 6%,transparent 70%);
}
.article-hero .site-container{position:relative}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13px;color:var(--ink-3);margin-bottom:20px}
.crumb .sep{opacity:.45}
.crumb a:hover{color:var(--brand-2)}
.article-meta{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:18px}
.meta-pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;border-radius:999px;font-size:12.5px;
  color:#9fd0ff;border:1px solid rgba(96,164,255,.32);
  background:rgba(35,68,132,.32);
}
.meta-pill i{font-size:11.5px}
.article-title{
  font-size:clamp(23px,3.1vw,37px);
  line-height:1.4;
  font-weight:800;
  letter-spacing:.4px;
  max-width:920px;
  color:#f2f7ff;
  overflow-wrap:break-word;
}
.article-lead{margin-top:18px;max-width:840px;color:var(--ink-2);font-size:15.5px;line-height:1.95}
/* ---------- article shell ---------- */
.article-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr) 316px;
  gap:32px;
  align-items:start;
  padding:var(--space) 0;
}
.article-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:34px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  min-width:0;
}
/* ---------- article body ---------- */
.article-body{font-size:16.5px;line-height:1.95;color:#d8e4fb;overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:22px;margin:34px 0 14px;padding-left:14px;
  border-left:4px solid var(--brand);color:#eaf2ff;
}
.article-body h3{font-size:18.5px;margin:26px 0 10px;color:#dce9ff}
.article-body h4{font-size:16.5px;margin:20px 0 8px;color:#cfe0fb}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:1.35em}
.article-body li{margin-bottom:8px}
.article-body a{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#8ff0ff}
.article-body img{border-radius:14px;margin:20px 0;border:1px solid var(--line)}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;
  border-left:3px solid var(--brand-2);
  background:rgba(34,211,238,.08);
  border-radius:0 12px 12px 0;
  color:#cfe0fb;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:rgba(59,124,255,.14);color:#dbe9ff;font-weight:600}
.article-body pre{
  background:rgba(6,14,30,.9);border:1px solid var(--line);
  border-radius:12px;padding:16px;overflow-x:auto;font-size:14px;
}
.article-body code{background:rgba(59,124,255,.16);padding:2px 6px;border-radius:6px;font-size:14px}
.article-empty{
  text-align:center;padding:40px 10px;
}
.article-empty i{font-size:34px;color:var(--ink-3);margin-bottom:14px;display:block}
.article-empty h2{font-size:20px;margin-bottom:10px;border-left:none;padding-left:0}
.article-empty p{color:var(--ink-2);margin-bottom:20px}
/* ---------- sidebar ---------- */
.side-stack{display:grid;gap:18px;position:sticky;top:92px;min-width:0}
.side-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:16px;
  padding:22px;
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  min-width:0;
}
.side-card h3{font-size:15px;color:#dbe9ff;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--brand-2);font-size:13.5px}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;color:var(--ink-3);padding:8px 0;border-bottom:1px dashed rgba(88,140,255,.16)}
.side-list li:last-child{border-bottom:none;padding-bottom:0}
.side-list li span:last-child{color:#bcd4f7;text-align:right;overflow-wrap:break-word}
.side-note{font-size:13.5px;color:var(--ink-3);line-height:1.85;margin:0}
.side-card .btn{width:100%;margin-top:6px}
/* ---------- download ---------- */
.download-panel{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.dl-card{
  display:flex;flex-direction:column;gap:10px;
  padding:24px;border-radius:16px;
  border:1px solid var(--line);
  background:rgba(19,32,58,.62);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  transition:transform .22s,border-color .22s,box-shadow .22s;
  min-width:0;
}
.dl-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(3,12,32,.5)}
.dl-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(59,124,255,.9),rgba(34,211,238,.7));
  color:#04101f;font-size:18px;
}
.dl-name{font-size:16px;font-weight:700;color:#e9f2ff}
.dl-note{font-size:13px;color:var(--ink-3);line-height:1.8;margin:0}
.dl-card .btn{margin-top:6px}
/* ---------- check list ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.check-item{
  display:flex;gap:14px;padding:20px;border-radius:14px;
  border:1px solid var(--line);background:rgba(14,26,48,.6);min-width:0;
}
.check-item .num{
  flex:0 0 auto;width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#04101f;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.check-item h3{font-size:15.5px;margin-bottom:6px;color:#e6f0ff}
.check-item p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.85}
/* ---------- steps ---------- */
.step-list{display:grid;gap:14px;counter-reset:flowstep}
.step-row{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:16px;align-items:start;
  padding:20px 22px;border-radius:14px;border:1px solid var(--line);
  background:rgba(13,24,46,.62);
}
.step-row .step-idx{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:#8fc4ff;font-size:14px;font-weight:700;
}
.step-row h3{font-size:15.5px;color:#e6f0ff;margin-bottom:6px}
.step-row p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.85}
/* ---------- glossary ---------- */
.glossary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 22px}
.gloss-item{padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:rgba(13,24,46,.55);min-width:0}
.gloss-item dt{font-size:14.5px;font-weight:700;color:#cfe4ff;margin-bottom:6px}
.gloss-item dd{margin:0;font-size:13.8px;color:var(--ink-2);line-height:1.85}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;
  background:rgba(13,24,46,.6);overflow:hidden;
}
.faq-item summary{
  cursor:pointer;padding:18px 22px;font-size:15.5px;color:#e6f0ff;font-weight:600;
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:12px;color:var(--brand-2);transition:transform .2s;flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item summary:hover{color:#fff}
.faq-item .faq-body{padding:0 22px 20px;color:var(--ink-2);font-size:14.5px;line-height:1.9}
.faq-item .faq-body p:last-child{margin-bottom:0}
/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line-strong);
  border-radius:22px;
  padding:40px;
  background:
    radial-gradient(620px 260px at 6% 0%, rgba(59,124,255,.28), transparent 62%),
    radial-gradient(520px 240px at 96% 100%, rgba(34,211,238,.18), transparent 60%),
    rgba(11,21,42,.86);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(20px,2.4vw,27px);margin-bottom:12px;color:#f0f6ff}
.cta-band p{color:var(--ink-2);font-size:15px;max-width:760px;margin-bottom:22px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
/* ---------- related ---------- */
.related-card{
  display:flex;flex-direction:column;gap:10px;
  padding:24px;border-radius:16px;border:1px solid var(--line);
  background:rgba(16,28,52,.66);min-width:0;
  transition:transform .2s,border-color .2s,box-shadow .2s;
}
.related-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 18px 40px rgba(3,12,32,.5)}
.related-card h3{font-size:16px;color:#e7f0ff}
.related-card p{margin:0;font-size:14px;color:var(--ink-2);line-height:1.85}
.related-card .more{margin-top:auto;font-size:14px;color:var(--brand-2);font-weight:600;display:inline-flex;align-items:center;gap:7px}
.more-row{margin-top:26px;text-align:center}
/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,18,38,.92),rgba(4,8,18,.98));
  padding:56px 0 26px;
  margin-top:16px;
}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;margin-bottom:14px;color:#eaf2ff}
.footer-desc{color:var(--ink-3);font-size:14px;line-height:1.9;max-width:520px;margin:0}
.footer-col h4{font-size:14px;letter-spacing:1px;color:#cfe1ff;margin-bottom:12px}
.footer-col a{display:block;color:var(--ink-3);font-size:14px;padding:5px 0}
.footer-col a:hover{color:var(--brand-2)}
.friend-area{margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.friend-area h4{font-size:14px;color:#cfe1ff;margin-bottom:12px}
.friend-links{display:flex;flex-wrap:wrap;gap:10px 14px}
.friend-links a{
  font-size:13.5px;color:var(--ink-3);padding:5px 12px;
  border:1px solid var(--line);border-radius:999px;
  transition:color .2s,border-color .2s,background .2s;
}
.friend-links a:hover{color:#fff;border-color:var(--line-strong);background:rgba(59,124,255,.16)}
.footer-bottom{
  margin-top:26px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--space:56px}
  .site-nav{flex-wrap:wrap;gap:12px;padding:10px 0}
  .nav-links{order:3;width:100%;margin-left:0;overflow-x:auto;padding-bottom:4px;flex-wrap:nowrap}
  .nav-tools{margin-left:auto}
  .nav-search input{width:150px}
  .nav-search input:focus{width:170px}
  .article-shell{grid-template-columns:minmax(0,1fr);gap:26px}
  .side-stack{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-panel{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:768px){
  :root{--space:46px}
  .nav-search{display:none}
  .brand-text small{display:none}
  .brand{font-size:17px}
  .article-hero{padding:38px 0 30px}
  .article-panel{padding:24px}
  .article-body{font-size:16px}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .check-grid{grid-template-columns:minmax(0,1fr)}
  .glossary{grid-template-columns:minmax(0,1fr)}
  .download-panel{grid-template-columns:minmax(0,1fr)}
  .side-stack{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .cta-band{padding:28px 24px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .article-title{font-size:22px}
  .article-panel{padding:18px}
  .btn{padding:10px 18px;font-size:14.5px}
  .meta-pill{font-size:12px}
}

/* roulang page: category1 */
:root{
  --bg:#050a15;
  --bg-soft:#081226;
  --panel:rgba(16,28,52,.72);
  --panel-solid:#0d1a33;
  --line:rgba(88,140,255,.18);
  --line-strong:rgba(96,152,255,.42);
  --ink:#e9f0ff;
  --ink-2:#a9bbdd;
  --ink-3:#7c90b8;
  --brand:#3b7cff;
  --brand-2:#22d3ee;
  --warm:#ffb648;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px rgba(2,10,30,.55);
  --space:74px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:
    radial-gradient(1200px 620px at 12% -12%, rgba(59,124,255,.22), transparent 62%),
    radial-gradient(900px 520px at 92% -4%, rgba(34,211,238,.13), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:var(--brand-2)}
button{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.45}
p{margin:0}
ul,ol{margin:0;padding:0}
.site-container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,12,26,.84);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-nav{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.4px;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#04101f;font-size:17px;font-weight:800;
  box-shadow:0 8px 24px rgba(59,124,255,.45);
}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:1.6px;line-height:1.1}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:6px}
.nav-links a{padding:8px 15px;border-radius:999px;font-size:15px;color:var(--ink-2);white-space:nowrap;transition:background .2s,color .2s,box-shadow .2s}
.nav-links a:hover{color:#fff;background:rgba(59,124,255,.15)}
.nav-links a.active{
  color:#fff;
  background:linear-gradient(135deg,rgba(59,124,255,.95),rgba(34,211,238,.72));
  box-shadow:0 8px 22px rgba(59,124,255,.36);
}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:196px;padding:9px 16px 9px 36px;border-radius:999px;
  border:1px solid var(--line);background:rgba(12,22,42,.92);
  color:var(--ink);font-size:14px;outline:none;
  transition:width .25s,border-color .2s,box-shadow .2s;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{width:226px;border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(59,124,255,.2)}
.nav-search i{position:absolute;left:13px;color:var(--ink-3);font-size:13px;pointer-events:none}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn i{font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,#3b7cff,#22d3ee);
  color:#04101f;
  box-shadow:0 10px 26px rgba(59,124,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(59,124,255,.52);color:#04101f}
.btn-ghost{border-color:var(--line-strong);color:var(--ink);background:rgba(19,32,58,.55)}
.btn-ghost:hover{background:rgba(59,124,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px}

/* ---------- 分类页首屏 ---------- */
.cat-hero{position:relative;padding:54px 0 62px;border-bottom:1px solid var(--line);overflow:hidden}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(88,140,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(88,140,255,.07) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 30% 10%,#000 6%,transparent 72%);
  mask-image:radial-gradient(circle at 30% 10%,#000 6%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:42px;align-items:start}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:18px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--brand-2)}
.page-title{font-size:clamp(26px,3.3vw,40px);line-height:1.34;font-weight:800;letter-spacing:.4px}
.page-title em{font-style:normal;background:linear-gradient(120deg,#8fc4ff,#5ce4f5);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-lead{margin-top:18px;max-width:660px;color:var(--ink-2);font-size:16px;line-height:1.95}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.tag-pill{
  padding:6px 14px;border-radius:999px;font-size:13px;
  color:#9fd0ff;border:1px solid rgba(96,164,255,.35);
  background:rgba(35,68,132,.35);
}
.tag-pill.hot{color:var(--warm);border-color:rgba(255,182,72,.4);background:rgba(88,58,12,.35)}

.glass-panel{
  background:var(--panel);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  padding:24px;
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  min-width:0;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:14px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.panel-head h2{font-size:15px;letter-spacing:.6px;color:#d3e5ff}
.panel-badge{font-size:12px;color:var(--brand-2);border:1px solid rgba(34,211,238,.35);background:rgba(34,211,238,.1);padding:3px 10px;border-radius:999px;white-space:nowrap}
.checklist{list-style:none;display:grid;gap:13px}
.checklist li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);line-height:1.7;min-width:0}
.checklist i{color:var(--brand-2);font-size:13px;margin-top:5px;flex:0 0 auto}

/* ---------- 通用板块 ---------- */
.site-section{padding:var(--space) 0;position:relative}
.site-section.alt{
  background:linear-gradient(180deg,rgba(10,20,40,.72),rgba(6,12,26,.24));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{max-width:780px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:2.4px;color:#7fb4ff;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand),transparent);display:inline-block}
.section-title{font-size:clamp(22px,2.6vw,31px);font-weight:700;line-height:1.4;letter-spacing:.3px}
.section-desc{margin-top:14px;color:var(--ink-2);font-size:15.5px;line-height:1.9}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;gap:20px}
.card-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card-grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.info-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  min-width:0;
  transition:transform .25s,border-color .25s,box-shadow .25s,background .25s;
}
.info-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow);background:rgba(20,34,62,.82)}
.info-card h3{font-size:17px;margin-bottom:10px}
.info-card p{color:var(--ink-2);font-size:14.5px;line-height:1.85}
.card-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(59,124,255,.15);border:1px solid var(--line);
  color:#8fc0ff;font-size:17px;margin-bottom:14px;
}

/* ---------- 左右分栏 ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:start}
.split-body h2{margin-bottom:16px}
.split-body p{color:var(--ink-2);font-size:15px;line-height:1.95}
.split-body p + p{margin-top:14px}
.bullet-list{list-style:none;display:grid;gap:14px;margin-top:22px}
.bullet-list li{position:relative;padding-left:18px;color:var(--ink-2);font-size:15px;line-height:1.85;min-width:0}
.bullet-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-2)}
.bullet-list strong{color:var(--ink)}
.formula-box{margin-top:8px}
.formula{
  display:block;
  font-size:15px;
  color:#a8dcff;
  background:rgba(6,16,34,.85);
  border:1px dashed var(--line-strong);
  border-radius:12px;
  padding:14px 16px;
  margin-bottom:12px;
  overflow-x:auto;
  white-space:nowrap;
}
.formula-note{font-size:13.5px;color:var(--ink-3);line-height:1.8}

/* ---------- 步骤 ---------- */
.step-list{display:grid;gap:14px}
.step-item{
  display:flex;gap:16px;padding:18px 20px;
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-sm);min-width:0;
  transition:border-color .2s,transform .2s;
}
.step-item:hover{border-color:var(--line-strong);transform:translateX(3px)}
.step-num{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(59,124,255,.9),rgba(34,211,238,.7));
  color:#04101f;font-weight:800;font-size:15px;
}
.step-body{min-width:0}
.step-body h3{font-size:16px;margin-bottom:6px}
.step-body p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* ---------- 误区 ---------- */
.mistake-list{display:grid;gap:14px}
.mistake{
  display:flex;gap:14px;padding:18px 20px;min-width:0;
  border-radius:var(--radius-sm);
  background:rgba(255,182,72,.06);
  border:1px solid rgba(255,182,72,.22);
}
.mistake i{color:var(--warm);font-size:16px;margin-top:4px;flex:0 0 auto}
.mistake h3{font-size:15.5px;margin-bottom:6px}
.mistake p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;transition:border-color .2s}
.faq-item[open]{border-color:var(--line-strong)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:16px 20px;font-size:15.5px;font-weight:600;
  display:flex;justify-content:space-between;gap:14px;align-items:center;
  transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:rgba(59,124,255,.1)}
.faq-item summary:focus-visible{outline:2px solid var(--brand-2);outline-offset:-2px}
.faq-item summary::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  color:var(--ink-3);transition:transform .25s;flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-answer{padding:0 20px 18px;color:var(--ink-2);font-size:14.5px;line-height:1.9}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.news-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow);color:inherit}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-3)}
.news-tag{color:#9fd0ff;background:rgba(59,124,255,.14);border:1px solid var(--line);padding:2px 9px;border-radius:999px;white-space:nowrap}
.news-card h3{font-size:16px;line-height:1.6;color:var(--ink)}
.news-card p{font-size:14px;color:var(--ink-2);line-height:1.8;flex:1}
.news-more{font-size:13.5px;color:#8fc0ff;display:inline-flex;align-items:center;gap:6px}
.empty-note{
  padding:26px;border:1px dashed var(--line-strong);border-radius:var(--radius-sm);
  color:var(--ink-3);text-align:center;font-size:15px;background:rgba(10,20,40,.5);
}

/* ---------- 下载 ---------- */
.download-panel{
  position:relative;overflow:hidden;
  border-radius:24px;border:1px solid var(--line-strong);
  background:linear-gradient(135deg,rgba(23,44,88,.92),rgba(9,18,36,.96));
  padding:38px;box-shadow:var(--shadow);
}
.download-panel::after{
  content:"";position:absolute;width:340px;height:340px;right:-120px;top:-140px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,238,.28),transparent 68%);
  pointer-events:none;
}
.download-head{position:relative;max-width:680px}
.download-head h2{font-size:clamp(21px,2.4vw,28px)}
.download-head p{margin-top:12px;color:var(--ink-2);font-size:15px;line-height:1.9}
.download-buttons{position:relative;display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.dl-btn{
  flex:1 1 210px;min-width:0;display:flex;align-items:center;gap:14px;
  padding:16px 18px;border-radius:14px;
  border:1px solid var(--line);background:rgba(10,22,44,.82);
  transition:border-color .2s,transform .2s,background .2s,box-shadow .2s;
}
.dl-btn:hover{border-color:var(--line-strong);background:rgba(30,54,100,.9);transform:translateY(-3px);box-shadow:0 14px 30px rgba(3,12,32,.5);color:inherit}
.dl-btn i{font-size:20px;color:#8fc0ff;flex:0 0 auto}
.dl-btn strong{display:block;font-size:15px;color:var(--ink)}
.dl-btn span{display:block;font-size:12.5px;color:var(--ink-3)}
.dl-note{position:relative;margin-top:18px;font-size:13px;color:var(--ink-3);line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:rgba(5,10,21,.92);padding:56px 0 26px;margin-top:10px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);gap:34px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-desc{color:var(--ink-3);font-size:14px;line-height:1.9;max-width:520px}
.footer-col h4{font-size:14px;color:#cfe2ff;margin-bottom:14px;letter-spacing:.5px}
.footer-col a{display:block;color:var(--ink-3);font-size:14px;padding:5px 0;transition:color .2s,transform .2s}
.footer-col a:hover{color:var(--brand-2);transform:translateX(3px)}
.friend-area{margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.friend-area h4{font-size:14px;color:#cfe2ff;margin-bottom:12px;letter-spacing:.5px}
.friend-links{display:flex;flex-wrap:wrap;gap:10px 18px}
.friend-links a{font-size:13.5px;color:var(--ink-3);padding:3px 0}
.friend-links a:hover{color:var(--brand-2)}
.footer-bottom{
  margin-top:26px;padding-top:18px;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);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--space:56px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .split{grid-template-columns:minmax(0,1fr);gap:26px}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-grid > div:first-child{grid-column:1 / -1}
  .nav-search input{width:150px}
  .nav-search input:focus{width:170px}
}
@media (max-width:768px){
  :root{--space:44px}
  .site-nav{flex-wrap:wrap;gap:12px;padding:12px 0}
  .nav-tools{margin-left:auto}
  .nav-search{display:none}
  .nav-links{order:3;width:100%;margin-left:0;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}
  .nav-links a{font-size:14px;padding:7px 13px}
  .cat-hero{padding:38px 0 44px}
  .page-lead{font-size:15px}
  .card-grid-3,.card-grid-2{grid-template-columns:minmax(0,1fr)}
  .news-grid{grid-template-columns:minmax(0,1fr)}
  .download-panel{padding:26px 20px;border-radius:18px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .btn{padding:10px 20px;font-size:14.5px}
}
@media (max-width:520px){
  .site-container{padding:0 16px}
  .brand-text small{letter-spacing:1px}
  .hero-actions .btn{width:100%}
  .dl-btn{flex:1 1 100%}
  .step-item,.mistake{padding:16px}
  .info-card{padding:20px}
  .footer-bottom{flex-direction:column;gap:6px}
}