/* roulang page: index */
:root{
  --bg0:#050814;
  --bg1:#0A1026;
  --bg2:#101832;
  --panel:rgba(18,28,58,.72);
  --panel-strong:rgba(24,36,72,.88);
  --line:rgba(120,220,255,.18);
  --primary:#26E0FF;
  --primary-2:#7C5CFF;
  --accent:#FFB86B;
  --success:#38E8A0;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --muted:#8FA3C8;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:24px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(38,224,255,.35);
  --max:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  background:var(--bg0);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(124,92,255,.20), transparent 62%),
    radial-gradient(900px 520px at 8% 6%, rgba(38,224,255,.16), transparent 60%),
    linear-gradient(180deg,#050814 0%,#0A1026 46%,#050814 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,220,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,220,255,.055) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s ease, background-color .25s ease, border-color .25s ease, opacity .25s ease}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:96px 0;position:relative}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary);border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;background:rgba(38,224,255,.07);margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:var(--glow)}
h2{font-size:clamp(26px,3vw,40px);line-height:1.25}
h3{font-size:clamp(18px,1.6vw,22px);line-height:1.5}
.lead{color:var(--muted);font-size:17px;margin-top:16px}
.text-accent{color:var(--primary)}
.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(38,224,255,.4),transparent);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),var(--primary-2));
  color:#04101f;box-shadow:0 10px 30px rgba(38,224,255,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(38,224,255,.45);color:#04101f}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(38,224,255,.3)}
.btn-ghost{border-color:var(--line);background:rgba(18,28,58,.6);color:var(--text)}
.btn-ghost:hover{border-color:rgba(38,224,255,.55);color:var(--primary);transform:translateY(-2px)}
.btn-small{padding:9px 18px;font-size:14px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,10,24,.8);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.75),rgba(124,92,255,.6),transparent);
}
.nav{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#04101f;font-size:14px;font-weight:800;box-shadow:var(--glow);letter-spacing:-.02em;
}
.brand-text{font-size:17px;line-height:1.2}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.14em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-block;padding:9px 15px;border-radius:999px;
  font-size:15px;color:var(--muted);white-space:nowrap;
}
.nav-links a:hover{color:var(--text);background:rgba(38,224,255,.08)}
.nav-links a.active{color:var(--text);text-shadow:0 0 14px rgba(38,224,255,.65)}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);
  bottom:2px;width:20px;height:2px;border-radius:2px;background:var(--primary);box-shadow:var(--glow);
}
.nav-cta{flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(18,28,58,.7);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;position:fixed;inset:76px 0 0 0;z-index:70;
  background:rgba(5,9,22,.96);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  padding:32px 24px 48px;overflow-y:auto;
}
.mobile-panel.is-open{display:block}
.mobile-panel a{
  display:block;padding:16px 18px;border-radius:var(--radius-m);
  border:1px solid var(--line);background:rgba(18,28,58,.55);
  margin-bottom:12px;font-size:16px;font-weight:600;
}
.mobile-panel a.active{color:var(--primary);border-color:rgba(38,224,255,.5)}
.mobile-panel .btn{width:100%;margin-top:8px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:84px 0 72px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(100deg, rgba(5,8,20,.95) 0%, rgba(5,8,20,.78) 46%, rgba(5,8,20,.5) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(180deg, rgba(38,224,255,.06) 0 1px, transparent 1px 4px);
  opacity:.7;
}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:center}
.hero h1{font-size:clamp(32px,5vw,56px);line-height:1.16;margin-bottom:20px}
.hero h1 .hl{
  background:linear-gradient(120deg,#26E0FF,#7C5CFF 62%,#FFB86B);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{color:#B9C8E6;font-size:17px;max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:36px;
  padding-top:24px;border-top:1px solid var(--line);
}
.trust-item{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:7px 14px;background:rgba(18,28,58,.5);
}
.trust-item b{color:var(--text);font-weight:700}
.hero-panel{
  position:relative;border-radius:var(--radius-l);border:1px solid var(--line);
  background:var(--panel);box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  padding:16px;overflow:hidden;
}
.hero-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,220,255,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,220,255,.09) 1px, transparent 1px);
  background-size:36px 36px;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 85%);
  mask-image:linear-gradient(180deg,#000,transparent 85%);
}
.hero-panel img{border-radius:var(--radius-m);aspect-ratio:16/11;object-fit:cover;width:100%}
.hero-chip{
  position:absolute;right:26px;bottom:26px;
  background:var(--panel-strong);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:14px 18px;box-shadow:var(--shadow);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.hero-chip strong{display:block;font-size:22px;color:var(--primary);font-variant-numeric:tabular-nums}
.hero-chip span{font-size:12px;color:var(--muted)}

/* ---------- 功能卡片 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.feature-card{
  position:relative;border:1px solid var(--line);border-radius:var(--radius-l);
  background:var(--panel);padding:26px;overflow:hidden;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(38,224,255,.42);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.feature-card .num{
  font-size:13px;color:var(--primary);font-variant-numeric:tabular-nums;
  letter-spacing:.16em;display:inline-block;margin-bottom:14px;
}
.feature-card h3{margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:15.5px}
.feature-card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
  font-size:12.5px;color:var(--muted);border:1px solid var(--line);
  border-radius:999px;padding:4px 12px;background:rgba(38,224,255,.05);
}
.feature-media{border-radius:var(--radius-m);overflow:hidden;margin-bottom:20px;border:1px solid var(--line)}
.feature-media img{aspect-ratio:16/9;object-fit:cover;width:100%}
.f-lg{grid-column:span 7}
.f-sm{grid-column:span 5}
.f-half{grid-column:span 6}
.feature-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:14.5px;font-weight:600;color:var(--primary)}
.feature-link::after{content:"→";transition:transform .25s ease}
.feature-link:hover::after{transform:translateX(4px)}

/* ---------- 数据条 ---------- */
.stats-band{
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:linear-gradient(120deg, rgba(16,24,50,.9), rgba(10,16,38,.72));
  padding:36px 32px;box-shadow:var(--shadow);
}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.stat{position:relative;padding-top:16px}
.stat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2),transparent);
  box-shadow:var(--glow);
}
.stat b{display:block;font-size:clamp(30px,3.4vw,44px);line-height:1.1;font-variant-numeric:tabular-nums;color:var(--text)}
.stat b em{font-style:normal;font-size:16px;color:var(--primary);margin-left:4px}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:8px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  border:1px solid var(--line);border-radius:var(--radius-l);background:var(--panel);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(38,224,255,.42);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.news-card-link{display:block;padding:24px;height:100%}
.news-badge{
  display:inline-block;font-size:12px;color:var(--primary);
  border:1px solid rgba(38,224,255,.35);border-radius:999px;
  padding:3px 12px;background:rgba(38,224,255,.08);margin-bottom:16px;
}
.news-title{font-size:18px;line-height:1.55;font-weight:700;margin-bottom:10px}
.news-card:hover .news-title{color:var(--primary)}
.news-desc{color:var(--muted);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:block;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.news-empty{
  grid-column:1/-1;text-align:center;padding:56px 24px;
  border:1px dashed var(--line);border-radius:var(--radius-l);background:rgba(18,28,58,.45);
}
.news-empty p{color:var(--muted);margin-bottom:18px}

/* ---------- 案例 ---------- */
.case-wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:32px;align-items:stretch}
.case-media{
  position:relative;border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);min-height:320px;
}
.case-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.case-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(5,8,20,.1), rgba(5,8,20,.78));
}
.case-caption{
  position:absolute;left:24px;right:24px;bottom:22px;z-index:1;
}
.case-caption h3{font-size:20px;margin-bottom:6px}
.case-caption p{font-size:14px;color:#B9C8E6}
.case-notes{display:flex;flex-direction:column;gap:18px}
.case-note{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--panel);padding:22px;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:border-color .3s ease, transform .3s ease;
}
.case-note:hover{border-color:rgba(38,224,255,.4);transform:translateY(-3px)}
.case-note strong{display:block;font-size:15px;color:var(--primary);margin-bottom:6px}
.case-note p{color:var(--muted);font-size:14.5px}

/* ---------- 时间线 ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.timeline::before{
  content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg, rgba(38,224,255,.5), rgba(124,92,255,.5), rgba(38,224,255,.12));
}
.tl-item{position:relative;padding-top:64px}
.tl-node{
  position:absolute;top:10px;left:0;width:34px;height:34px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;font-weight:700;color:#04101f;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
}
.tl-item h3{font-size:17px;margin-bottom:8px}
.tl-item p{color:var(--muted);font-size:14.5px}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,7fr);gap:48px;align-items:start}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--panel);overflow:hidden;
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:border-color .3s ease, background .3s ease;
}
.faq-item.open{border-color:rgba(38,224,255,.45);background:var(--panel-strong)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16px;font-weight:600;
}
.faq-icon{position:relative;flex-shrink:0;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:9px;left:2px;width:16px;height:2px;border-radius:2px;
  background:var(--primary);transition:transform .3s ease;
}
.faq-icon::after{transform:rotate(90deg)}
.faq-item.open .faq-icon::after{transform:rotate(0deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:340px}
.faq-a p{padding:0 22px 22px;color:var(--muted);font-size:15px}

/* ---------- 联系 ---------- */
.contact-layout{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:32px;align-items:start}
.contact-card{
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:var(--panel);padding:32px;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:14px;color:var(--muted)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:var(--radius-s);
  border:1px solid var(--line);background:rgba(8,13,32,.72);
  color:var(--text);transition:border-color .25s ease, box-shadow .25s ease;
}
.field textarea{min-height:132px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:#63769b}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(38,224,255,.65);box-shadow:0 0 0 3px rgba(38,224,255,.14);
}
.form-msg{margin-top:14px;font-size:14px;min-height:22px;color:var(--success)}
.form-msg.is-error{color:var(--danger)}
.info-list{display:flex;flex-direction:column;gap:16px;margin-top:26px}
.info-item{border:1px solid var(--line);border-radius:var(--radius-m);background:rgba(12,19,42,.7);padding:18px 20px}
.info-item strong{display:block;font-size:14px;color:var(--primary);margin-bottom:4px}
.info-item span{font-size:14px;color:var(--muted)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:24px;border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(10,16,38,.6), rgba(5,8,20,.95));
  position:relative;
}
.site-footer::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.6),rgba(124,92,255,.5),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:60px 0 40px}
.footer-brand p{color:var(--muted);font-size:14px;margin-top:16px;max-width:330px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--muted);font-size:14.5px}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:22px 0 32px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--muted);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1100px}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .hero{padding:64px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .f-lg,.f-sm,.f-half{grid-column:span 12}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .case-wrap{grid-template-columns:1fr}
  .timeline{grid-template-columns:repeat(2,1fr)}
  .timeline::before{display:none}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .contact-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero-actions .btn{width:100%}
  .news-grid{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .stats-band{padding:26px 20px}
  .contact-card{padding:24px}
  .brand-text{font-size:15.5px}
  .brand-sub{letter-spacing:.08em}
}
@media (max-width:479px){
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .hero-chip{right:16px;bottom:16px;padding:10px 14px}
}

/* roulang page: article */
:root{
  --bg0:#050814;--bg1:#0A1026;--bg2:#101832;
  --panel:rgba(18,28,58,.72);--panel-strong:rgba(24,36,72,.88);
  --line:rgba(120,220,255,.18);--line-strong:rgba(120,220,255,.38);
  --primary:#26E0FF;--primary-2:#7C5CFF;--accent:#FFB86B;
  --success:#38E8A0;--danger:#FF5C7A;
  --text:#EAF2FF;--muted:#8FA3C8;--muted-2:#6E82A8;
  --radius-s:12px;--radius-m:18px;--radius-l:24px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(38,224,255,.35);
  --glow-strong:0 0 34px rgba(38,224,255,.55);
  --container:1240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.85;color:var(--text);
  background:
    radial-gradient(1100px 620px at 12% -10%,rgba(38,224,255,.16),transparent 62%),
    radial-gradient(900px 560px at 92% 4%,rgba(124,92,255,.16),transparent 60%),
    linear-gradient(180deg,var(--bg0) 0%,var(--bg1) 46%,var(--bg0) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(120,220,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,220,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 78%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.35;
  background:repeating-linear-gradient(180deg,rgba(255,255,255,.028) 0 1px,transparent 1px 4px);
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease),text-shadow .22s var(--ease)}
a:hover{color:#8BF0FF;text-shadow:0 0 12px rgba(38,224,255,.55)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px}
ul,ol{padding-left:1.15em}
h1,h2,h3,h4{line-height:1.28;margin:0;font-weight:700;letter-spacing:.2px}
p{margin:0}
button{font-family:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,26,.82);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.75),rgba(124,92,255,.6),transparent);
}
.nav{display:flex;align-items:center;gap:26px;min-height:76px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);flex-shrink:0}
.brand:hover{color:var(--text)}
.brand-mark{
  width:42px;height:42px;border-radius:13px;flex-shrink:0;
  display:grid;place-items:center;font-weight:800;font-size:15px;letter-spacing:.5px;
  color:#04121B;background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
}
.brand-text{display:flex;flex-direction:column;font-size:17px;font-weight:700;letter-spacing:.4px;line-height:1.2}
.brand-sub{font-size:11px;font-weight:500;color:var(--muted-2);letter-spacing:1.4px;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0 0 0 auto;padding:0}
.nav-links a{
  position:relative;display:inline-block;padding:10px 14px;border-radius:12px;
  font-size:15px;color:var(--muted);font-weight:500;transition:all .22s var(--ease);
}
.nav-links a:hover{color:var(--text);background:rgba(38,224,255,.08)}
.nav-links a.active{color:#fff}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  box-shadow:0 0 12px rgba(38,224,255,.8);
}
.nav-cta{flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;padding:0;margin-left:auto;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:.28s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;flex-direction:column;gap:8px;padding:14px 24px 24px;
  border-bottom:1px solid var(--line);background:rgba(8,13,32,.96);
}
.mobile-panel.open{display:flex}
.mobile-panel a{padding:13px 14px;border-radius:12px;color:var(--muted);font-size:15px;border:1px solid transparent}
.mobile-panel a:hover,.mobile-panel a.active{color:var(--text);background:rgba(38,224,255,.09);border-color:var(--line)}
.mobile-panel .btn{margin-top:6px;justify-content:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.985)}
.btn-primary{
  color:#04121B;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
}
.btn-primary:hover{color:#04121B;box-shadow:var(--glow-strong);text-shadow:none}
.btn-ghost{color:var(--text);background:rgba(255,255,255,.04);border-color:var(--line)}
.btn-ghost:hover{color:#fff;border-color:var(--line-strong);background:rgba(38,224,255,.1)}
.btn-small{padding:10px 20px;font-size:14px}

/* ---------- breadcrumb ---------- */
.crumb-bar{border-bottom:1px solid var(--line);background:rgba(8,13,32,.5)}
.breadcrumb{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0;padding:16px 0;font-size:13.5px;color:var(--muted-2)}
.breadcrumb li{display:flex;align-items:center;gap:8px;min-width:0}
.breadcrumb li+li::before{content:"/";color:var(--muted-2);opacity:.6}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--text);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article layout ---------- */
.article-wrap{padding:56px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
.article-shell{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:44px 48px 52px;box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  position:relative;overflow:hidden;min-width:0;
}
.article-shell::before{
  content:"";position:absolute;inset:0 0 auto 0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.85),rgba(124,92,255,.7),transparent);
}
.article-head{margin-bottom:30px;padding-bottom:26px;border-bottom:1px dashed var(--line)}
.badge{
  display:inline-flex;align-items:center;gap:7px;padding:5px 14px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.6px;
  color:var(--primary);background:rgba(38,224,255,.1);border:1px solid var(--line-strong);
}
.article-head h1{
  font-size:clamp(27px,3.6vw,42px);line-height:1.28;margin:16px 0 18px;
  letter-spacing:.4px;
}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);display:inline-block;font-style:normal}

/* ---------- article body ---------- */
.article-body{font-size:17.5px;line-height:1.95;color:#DCE8FB;min-width:0}
.article-body>*+*{margin-top:20px}
.article-body p{margin:0}
.article-body h2{
  position:relative;font-size:clamp(21px,2.4vw,27px);line-height:1.4;
  margin:44px 0 16px;padding-left:16px;color:#fff;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--primary),var(--primary-2));
  box-shadow:0 0 14px rgba(38,224,255,.75);
}
.article-body h3{font-size:19.5px;margin:32px 0 12px;color:#EAF6FF}
.article-body h4{font-size:17px;margin:26px 0 10px;color:#CFE6FF}
.article-body ul,.article-body ol{padding-left:1.35em;display:grid;gap:9px}
.article-body li::marker{color:var(--primary)}
.article-body strong{color:#fff}
.article-body a{border-bottom:1px solid rgba(38,224,255,.45);padding-bottom:1px}
.article-body blockquote{
  margin:26px 0;padding:18px 24px;border-radius:var(--radius-m);
  background:rgba(38,224,255,.07);border:1px solid var(--line);border-left:3px solid var(--primary);
  color:#CFE6FF;
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--radius-m);border:1px solid var(--line);margin:26px 0}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13.5px;color:var(--muted-2);text-align:center;margin-top:10px}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border-radius:var(--radius-s);overflow:hidden;
}
.article-body th,.article-body td{padding:12px 16px;border:1px solid var(--line);text-align:left}
.article-body th{background:rgba(38,224,255,.1);color:#fff;font-weight:600}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
  background:rgba(38,224,255,.12);border:1px solid var(--line);border-radius:6px;padding:1px 7px;color:#9FF0FF;
}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}
.article-body .table-scroll{overflow-x:auto;margin:26px 0}

/* ---------- empty state ---------- */
.empty-state{
  text-align:center;padding:54px 26px;border-radius:var(--radius-m);
  border:1px dashed var(--line-strong);background:rgba(255,255,255,.03);
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:20px;display:grid;place-items:center;
  font-size:26px;color:var(--primary);background:rgba(38,224,255,.1);border:1px solid var(--line-strong);
  box-shadow:var(--glow);
}
.empty-state h2{font-size:22px;margin:0 0 10px}
.empty-state p{color:var(--muted);font-size:15.5px;max-width:520px;margin:0 auto 22px}

/* ---------- aside ---------- */
.article-aside{display:grid;gap:22px;position:sticky;top:104px}
.side-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:24px;box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:9px}
.side-card h3::before{content:"";width:8px;height:8px;border-radius:3px;background:var(--primary);box-shadow:0 0 10px var(--primary)}
.side-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:11px;font-size:14.5px;color:var(--muted);
  border:1px solid transparent;transition:all .22s var(--ease);
}
.side-list a:hover{color:var(--text);background:rgba(38,224,255,.09);border-color:var(--line);text-shadow:none;transform:translateX(2px)}
.side-list a span{color:var(--muted-2);font-size:13px}
.side-note{font-size:14px;color:var(--muted);line-height:1.8}

/* ---------- related ---------- */
.section{padding:76px 0}
.section-head{margin-bottom:36px;max-width:720px}
.section-tag{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:2px;color:var(--accent);
  text-transform:uppercase;margin-bottom:12px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;height:100%;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-m);
  overflow:hidden;box-shadow:var(--shadow);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 26px 70px rgba(0,0,0,.5),var(--glow)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.card:hover .card-media img{transform:scale(1.05)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,8,20,.82))}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:11px;flex:1}
.card-body h3{font-size:18px;line-height:1.45}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.75;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted-2);font-variant-numeric:tabular-nums}
.card-link{font-size:14px;font-weight:600;color:var(--primary)}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:0.85fr 1.15fr;gap:48px;align-items:start}
.faq-list{display:grid;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--panel);overflow:hidden;transition:border-color .26s var(--ease),background .26s var(--ease);
}
.faq-item.open{border-color:var(--line-strong);background:var(--panel-strong);box-shadow:var(--glow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q .plus{
  width:26px;height:26px;flex-shrink:0;border-radius:9px;position:relative;
  border:1px solid var(--line-strong);background:rgba(38,224,255,.08);transition:transform .3s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:11px;height:2px}
.faq-q .plus::after{width:2px;height:11px;transition:opacity .3s var(--ease)}
.faq-item.open .faq-q .plus{transform:rotate(180deg)}
.faq-item.open .faq-q .plus::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s var(--ease)}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--muted);line-height:1.85}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  border:1px solid var(--line-strong);
  padding:52px 48px;display:grid;grid-template-columns:1.25fr .75fr;gap:36px;align-items:center;
  background:
    radial-gradient(720px 340px at 12% 0%,rgba(38,224,255,.22),transparent 62%),
    radial-gradient(620px 320px at 92% 100%,rgba(124,92,255,.24),transparent 60%),
    linear-gradient(160deg,rgba(16,24,50,.94),rgba(8,12,30,.94));
  box-shadow:var(--shadow);
}
.cta-panel img.cta-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.14;z-index:0}
.cta-panel>*{position:relative;z-index:1}
.cta-panel h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.cta-panel p{color:var(--muted);font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.cta-side{display:grid;gap:14px}
.cta-stat{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;border-radius:var(--radius-s);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.cta-stat b{font-size:22px;font-variant-numeric:tabular-nums;background:linear-gradient(135deg,var(--primary),var(--primary-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.cta-stat span{font-size:13.5px;color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{margin-top:20px;border-top:1px solid var(--line);background:rgba(5,8,20,.72);position:relative;z-index:1}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.7),rgba(124,92,255,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:60px 0 40px}
.footer-brand p{margin-top:16px;font-size:14.5px;color:var(--muted);max-width:330px;line-height:1.8}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#fff}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col a{font-size:14.5px;color:var(--muted);display:inline-block}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0 30px;border-top:1px dashed var(--line);font-size:13.5px;color:var(--muted-2);
}
.footer-bottom a{color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .article-layout{grid-template-columns:1fr}
  .article-aside{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .cta-panel{grid-template-columns:1fr;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding:48px 0 32px}
  .article-shell{padding:34px 30px 40px}
  .section{padding:60px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .nav{min-height:68px;gap:14px}
  .brand-text{font-size:15.5px}
  .brand-sub{display:none}
  .brand-mark{width:38px;height:38px;border-radius:11px;font-size:13.5px}
  .article-wrap{padding:34px 0 60px}
  .article-shell{padding:26px 20px 32px;border-radius:var(--radius-m)}
  .article-body{font-size:16.5px;line-height:1.9}
  .article-body h2{margin-top:34px}
  .article-aside{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .breadcrumb .current{max-width:200px}
  .cta-panel{padding:32px 22px}
  .cta-actions .btn{width:100%}
  .section{padding:52px 0}
}
@media (max-width:479px){
  .article-meta{gap:8px 16px;font-size:13px}
  .btn{padding:12px 20px;font-size:14.5px}
}

/* roulang page: category2 */
:root{
  --bg0:#050814;
  --bg1:#0A1026;
  --bg2:#101832;
  --panel:rgba(18,28,58,.72);
  --panel-strong:rgba(24,36,72,.88);
  --line:rgba(120,220,255,.18);
  --line-strong:rgba(120,220,255,.42);
  --primary:#26E0FF;
  --primary-2:#7C5CFF;
  --accent:#FFB86B;
  --success:#38E8A0;
  --text:#EAF2FF;
  --muted:#8FA3C8;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:24px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(38,224,255,.35);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 8% -10%,rgba(38,224,255,.16),transparent 62%),
    radial-gradient(900px 560px at 96% 4%,rgba(124,92,255,.18),transparent 60%),
    linear-gradient(180deg,var(--bg0),var(--bg1) 46%,var(--bg0));
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(120,220,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,220,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(900px 700px at 50% 12%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(900px 700px at 50% 12%,#000 20%,transparent 78%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease,box-shadow .2s ease}
a:hover{color:var(--primary)}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
@media (min-width:1280px){.container{max-width:1320px}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15.5px;font-weight:600;letter-spacing:.3px;line-height:1;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(120deg,var(--primary),var(--primary-2));
  color:#04101f;box-shadow:0 10px 30px rgba(38,224,255,.28),var(--glow);
}
.btn-primary:hover{transform:translateY(-1px);color:#04101f;box-shadow:0 16px 40px rgba(38,224,255,.42),0 0 30px rgba(124,92,255,.45)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(38,224,255,.3)}
.btn-ghost{
  background:rgba(16,24,50,.6);border-color:var(--line-strong);color:var(--text);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);box-shadow:0 0 22px rgba(38,224,255,.25);transform:translateY(-1px)}
.btn-small{padding:11px 20px;font-size:14.5px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,20,.82);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.75),rgba(124,92,255,.65),transparent);
}
.nav{display:flex;align-items:center;gap:28px;min-height:76px}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  font-weight:800;font-size:16px;letter-spacing:.5px;color:#04101f;
  background:linear-gradient(140deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;font-weight:700;font-size:16.5px;color:var(--text);line-height:1.25}
.brand-sub{font-size:11.5px;font-weight:500;letter-spacing:1.6px;color:var(--muted);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  display:inline-block;padding:9px 14px;border-radius:10px;font-size:15px;color:#C7D6F2;
  position:relative;
}
.nav-links a:hover{color:var(--primary);background:rgba(38,224,255,.07)}
.nav-links a.active{color:var(--primary);text-shadow:0 0 16px rgba(38,224,255,.55)}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));box-shadow:0 0 12px rgba(38,224,255,.8);
}
.nav-cta{margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(16,24,50,.7);flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{
  display:none;flex-direction:column;gap:6px;padding:14px 24px 24px;
  background:rgba(6,11,26,.97);border-bottom:1px solid var(--line);
}
.mobile-panel.open{display:flex}
.mobile-panel a{
  padding:13px 14px;border-radius:12px;font-size:16px;color:#C7D6F2;
  border:1px solid transparent;
}
.mobile-panel a:hover,.mobile-panel a.active{background:rgba(38,224,255,.08);border-color:var(--line);color:var(--primary)}
.mobile-panel .btn{margin-top:10px;color:#04101f}

/* ---------- breadcrumb ---------- */
.crumb{padding:22px 0 0;font-size:14px;color:var(--muted)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:rgba(143,163,200,.5)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb strong{color:var(--text);font-weight:600}

/* ---------- hero ---------- */
.page-hero{
  position:relative;padding:56px 0 76px;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(90deg,rgba(5,8,20,.94) 0%,rgba(5,8,20,.86) 46%,rgba(5,8,20,.7) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.85;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(38,224,255,.05) 0 1px,transparent 1px 4px);
  opacity:.5;
  mask-image:linear-gradient(180deg,#000,transparent 82%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 82%);
}
.hero-inner{position:relative;z-index:1;max-width:880px;margin:0 auto;text-align:center}
.pill{
  display:inline-flex;align-items:center;gap:9px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(16,24,50,.62);backdrop-filter:blur(10px);
  font-size:13.5px;color:var(--primary);letter-spacing:.6px;
}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 12px var(--success)}
.page-hero h1{
  margin:24px 0 20px;
  font-size:clamp(32px,5vw,54px);line-height:1.18;font-weight:800;
}
.page-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,var(--primary),var(--primary-2) 70%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{font-size:18px;color:#B9C9E6;max-width:760px;margin:0 auto}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px}

/* ---------- tag rail ---------- */
.tag-rail{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:rgba(10,16,38,.72);backdrop-filter:blur(12px);
  padding:16px 0;
}
.tag-rail .rail-inner{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.tag{
  display:inline-flex;align-items:center;gap:7px;padding:7px 15px;border-radius:999px;
  border:1px solid var(--line);background:rgba(18,28,58,.7);
  font-size:13.5px;color:#B9C9E6;
}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);opacity:.8}
.tag:hover{border-color:var(--line-strong);color:var(--primary)}

/* ---------- section base ---------- */
.section{padding:96px 0}
.section-tight{padding:64px 0}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.section-head.left{margin-left:0;text-align:left}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:2.4px;color:var(--primary);
  text-transform:uppercase;margin-bottom:14px;
}
.section-head h2{font-size:clamp(26px,3vw,38px);font-weight:750;margin-bottom:16px}
.section-head p{color:var(--muted);font-size:16.5px}

/* ---------- waterfall cards ---------- */
.flow-grid{
  column-count:2;
  column-gap:24px;
}
@media (max-width:900px){.flow-grid{column-count:1}}
.flow-card{
  break-inside:avoid;
  margin-bottom:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-l);
  background:var(--panel);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.flow-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 26px 70px rgba(0,0,0,.5),0 0 26px rgba(38,224,255,.14)}
.flow-card .thumb{position:relative;overflow:hidden;background:#0b1330}
.flow-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease}
.flow-card:hover .thumb img{transform:scale(1.04)}
.flow-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,20,.05),rgba(5,8,20,.72));
}
.flow-card .thumb .num{
  position:absolute;top:14px;left:16px;z-index:2;
  font-size:12.5px;letter-spacing:1.6px;color:var(--primary);
  border:1px solid var(--line-strong);border-radius:999px;padding:5px 12px;
  background:rgba(5,8,20,.7);backdrop-filter:blur(8px);
  font-variant-numeric:tabular-nums;
}
.flow-body{padding:24px 26px 28px}
.flow-body h3{font-size:21px;margin-bottom:12px}
.flow-body p{color:#B4C5E2;font-size:16px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 0}
.chip{
  font-size:12.5px;padding:5px 11px;border-radius:8px;
  border:1px solid var(--line);background:rgba(38,224,255,.07);color:#9FD9EE;
}
.chip.alt{background:rgba(124,92,255,.12);border-color:rgba(124,92,255,.32);color:#C4B6FF}
.chip.warm{background:rgba(255,184,107,.1);border-color:rgba(255,184,107,.3);color:var(--accent)}

/* ---------- stats ---------- */
.stats{
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:linear-gradient(140deg,rgba(18,28,58,.86),rgba(10,16,38,.8));
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  padding:38px 34px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:26px;
}
.stat{position:relative;padding-top:20px}
.stat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));box-shadow:0 0 14px rgba(38,224,255,.6);
}
.stat .num{
  font-size:clamp(28px,3.4vw,40px);font-weight:800;line-height:1.1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,#fff,var(--primary));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat .unit{font-size:14px;color:var(--muted);margin-left:6px}
.stat .label{display:block;margin-top:8px;font-size:14px;color:var(--muted)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.steps::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.6),rgba(124,92,255,.6),transparent);
}
.step{
  position:relative;padding:28px 22px;border:1px solid var(--line);border-radius:var(--radius-m);
  background:var(--panel);backdrop-filter:blur(12px);text-align:center;
  transition:transform .25s ease,border-color .25s ease;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.step .idx{
  width:44px;height:44px;margin:0 auto 16px;border-radius:14px;display:grid;place-items:center;
  font-weight:800;font-size:15px;color:#04101f;
  background:linear-gradient(140deg,var(--primary),var(--primary-2));box-shadow:var(--glow);
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted)}

/* ---------- narrow two column ---------- */
.split{display:grid;grid-template-columns:0.9fr 1.1fr;gap:52px;align-items:start}
.sticky-note{
  position:sticky;top:104px;
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:var(--panel-strong);backdrop-filter:blur(14px);
  padding:32px 30px;box-shadow:var(--shadow);
}
.sticky-note h2{font-size:26px;margin-bottom:14px}
.sticky-note p{color:var(--muted);font-size:15.5px}
.sticky-note .fine{
  margin-top:20px;padding-top:20px;border-top:1px dashed var(--line);
  font-size:13.5px;color:var(--muted);
}
.note-list{margin-top:22px;display:grid;gap:12px}
.note-list li{
  display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:#B9C9E6;
  padding:13px 15px;border-radius:12px;border:1px solid var(--line);
  background:rgba(18,28,58,.5);
}
.note-list li span.k{color:var(--primary);font-weight:700;font-variant-numeric:tabular-nums}
.note-list li:hover{background:rgba(38,224,255,.08);border-color:var(--line-strong)}

.compare{display:grid;gap:18px}
.compare-item{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:rgba(16,24,50,.68);backdrop-filter:blur(12px);
  padding:26px 26px;transition:border-color .25s ease,transform .25s ease;
}
.compare-item:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.compare-item h3{font-size:19px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.compare-item h3 .bar{width:4px;height:18px;border-radius:3px;background:linear-gradient(180deg,var(--primary),var(--primary-2));box-shadow:0 0 12px rgba(38,224,255,.7)}
.compare-item p{color:#B4C5E2;font-size:15.5px}
.compare-item .meta-row{margin-top:14px}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:0.85fr 1.15fr;gap:52px;align-items:start}
.faq-aside h2{font-size:clamp(26px,3vw,36px);margin-bottom:16px}
.faq-aside p{color:var(--muted);font-size:16px}
.faq-aside .btn{margin-top:24px}
.faq-list{display:grid;gap:14px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-m);
  background:rgba(16,24,50,.66);backdrop-filter:blur(12px);
  overflow:hidden;transition:border-color .25s ease,background-color .25s ease,box-shadow .25s ease;
}
.faq-item.open{border-color:var(--line-strong);background:rgba(24,36,72,.86);box-shadow:0 0 26px rgba(38,224,255,.14)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;color:var(--text);text-align:left;
  padding:20px 24px;font-size:16.5px;font-weight:600;
}
.faq-q:hover{color:var(--primary)}
.faq-q .plus{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--line-strong);
  display:grid;place-items:center;color:var(--primary);font-size:17px;line-height:1;
  transition:transform .28s ease,background-color .25s ease;
}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:rgba(38,224,255,.16)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;color:#B4C5E2;font-size:15.5px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius-l);
  background:
    radial-gradient(600px 300px at 15% 0%,rgba(38,224,255,.2),transparent 65%),
    radial-gradient(560px 320px at 88% 100%,rgba(124,92,255,.22),transparent 65%),
    linear-gradient(150deg,rgba(18,28,58,.92),rgba(8,13,32,.94));
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  padding:60px 48px;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,220,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,220,255,.06) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(520px 320px at 50% 40%,#000,transparent 80%);
  -webkit-mask-image:radial-gradient(520px 320px at 50% 40%,#000,transparent 80%);
}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);margin-bottom:16px;position:relative}
.cta-band p{color:#B9C9E6;max-width:680px;margin:0 auto;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;position:relative}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(6,11,26,.6),rgba(4,7,18,.95));
  padding:66px 0 30px;position:relative;z-index:1;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.65),rgba(124,92,255,.55),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{color:var(--muted);font-size:15px;max-width:340px}
.footer-col h4{font-size:15.5px;margin-bottom:18px;color:var(--text)}
.footer-col ul{display:grid;gap:11px}
.footer-col a{color:var(--muted);font-size:14.5px;display:inline-block;padding:2px 0}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(120,220,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13.5px;color:var(--muted);
}
.footer-bottom a{color:#9FD9EE}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .section{padding:72px 0}
  .split,.faq-wrap{grid-template-columns:1fr;gap:34px}
  .sticky-note{position:static}
  .stats{grid-template-columns:repeat(2,1fr);padding:30px 26px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .page-hero{padding:36px 0 56px}
  .hero-lead{font-size:16.5px}
  .section{padding:56px 0}
  .section-head{margin-bottom:34px}
  .flow-grid{column-count:1}
  .flow-body{padding:20px 20px 24px}
  .cta-band{padding:40px 22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .faq-q{padding:17px 18px;font-size:15.5px}
  .faq-a p{padding:0 18px 18px}
  .sticky-note{padding:24px 20px}
}
@media (max-width:479px){
  .stats{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .brand-text{font-size:15px}
  .brand-sub{font-size:10.5px;letter-spacing:1.2px}
}

/* roulang page: category1 */
:root{
  --bg0:#050814;
  --bg1:#0A1026;
  --bg2:#101832;
  --panel:rgba(18,28,58,.72);
  --panel-strong:rgba(24,36,72,.88);
  --line:rgba(120,220,255,.18);
  --line-strong:rgba(120,220,255,.42);
  --primary:#26E0FF;
  --primary-2:#7C5CFF;
  --accent:#FFB86B;
  --success:#38E8A0;
  --danger:#FF5C7A;
  --text:#EAF2FF;
  --muted:#8FA3C8;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:24px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(38,224,255,.35);
  --container:1240px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:17px;
  line-height:1.8;
  color:var(--text);
  background-color:var(--bg0);
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(1000px 620px at 10% -6%, rgba(38,224,255,.16), transparent 62%),
    radial-gradient(900px 520px at 92% 6%, rgba(124,92,255,.17), transparent 64%),
    linear-gradient(180deg,var(--bg0) 0%,var(--bg1) 46%,var(--bg0) 100%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.32;
  background-image:
    linear-gradient(rgba(120,220,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,220,255,.07) 1px,transparent 1px);
  background-size:56px 56px;
}
img{max-width:100%;display:block;border-radius:var(--radius-s);}
a{color:var(--primary);text-decoration:none;transition:color .22s ease,box-shadow .22s ease,background-color .22s ease;}
a:hover{color:#9df1ff;text-decoration:underline;text-decoration-color:rgba(38,224,255,.6);text-underline-offset:4px;}
h1,h2,h3,h4{margin:0 0 14px;font-weight:700;line-height:1.25;letter-spacing:.2px;}
h1{font-size:clamp(32px,5vw,58px);line-height:1.15;}
h2{font-size:clamp(26px,3vw,40px);}
h3{font-size:clamp(19px,2vw,24px);}
p{margin:0 0 16px;color:#D3E0F5;}
ul{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:2;
}
main{position:relative;z-index:2;}
section{position:relative;z-index:2;}
.num{font-variant-numeric:tabular-nums;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,10,26,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,transparent,rgba(38,224,255,.55),rgba(124,92,255,.5),transparent) 1;
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.6),rgba(124,92,255,.55),transparent);
}
.nav{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:78px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--text);
  flex-shrink:0;
}
.brand:hover{text-decoration:none;color:var(--text);}
.brand-mark{
  width:44px;height:44px;
  display:grid;
  place-items:center;
  border-radius:14px;
  font-weight:800;
  font-size:15px;
  letter-spacing:.5px;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
}
.brand-text{
  display:flex;
  flex-direction:column;
  font-size:17px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.3px;
}
.brand-sub{
  font-size:11px;
  font-weight:500;
  letter-spacing:1.4px;
  text-transform:uppercase;
  color:var(--muted);
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-links a{
  display:block;
  position:relative;
  padding:10px 14px;
  border-radius:999px;
  font-size:15px;
  font-weight:500;
  color:#C6D6EF;
  text-decoration:none;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:4px;
  width:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  transform:translateX(-50%);
  transition:width .26s ease;
  box-shadow:0 0 12px rgba(38,224,255,.7);
}
.nav-links a:hover{
  color:#fff;
  background:rgba(38,224,255,.08);
  text-decoration:none;
}
.nav-links a:hover::after{width:52%;}
.nav-links a.active{
  color:#fff;
  text-shadow:0 0 14px rgba(38,224,255,.7);
}
.nav-links a.active::after{width:56%;}
.nav-cta{flex-shrink:0;}
.nav-toggle{
  display:none;
  width:46px;height:46px;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--panel);
  cursor:pointer;
  padding:0;
  place-items:center;
  gap:5px;
  flex-direction:column;
}
.nav-toggle span{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  position:fixed;
  top:78px;
  left:0;right:0;
  z-index:55;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:20px 24px 32px;
  background:rgba(8,13,32,.97);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow);
  opacity:0;
  visibility:hidden;
  transform:translateY(-14px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
  max-height:calc(100vh - 78px);
  overflow-y:auto;
}
.mobile-panel.open{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-panel a{
  padding:14px 16px;
  border-radius:var(--radius-s);
  border:1px solid transparent;
  color:#D3E0F5;
  font-weight:500;
  text-decoration:none;
}
.mobile-panel a:hover{background:rgba(38,224,255,.08);border-color:var(--line);}
.mobile-panel a.active{
  color:#fff;
  background:rgba(38,224,255,.1);
  border-color:var(--line-strong);
  box-shadow:inset 3px 0 0 var(--primary);
}
.mobile-panel .btn{margin-top:10px;justify-content:center;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:16px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  text-decoration:none;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,border-color .22s ease,color .22s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-2px);}
.btn:active{transform:translateY(0);filter:brightness(.94);}
.btn-primary{
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),#6FE9FF 45%,var(--primary-2));
  box-shadow:0 10px 30px rgba(38,224,255,.32),var(--glow);
}
.btn-primary:hover{box-shadow:0 14px 38px rgba(38,224,255,.45),0 0 32px rgba(38,224,255,.5);}
.btn-ghost{
  color:#DCEAFF;
  border-color:var(--line-strong);
  background:var(--panel);
  backdrop-filter:blur(12px);
}
.btn-ghost:hover{
  color:#fff;
  border-color:var(--primary);
  box-shadow:0 0 22px rgba(38,224,255,.28);
}
.btn-small{padding:10px 18px;font-size:14px;}

/* ============ 通用标签 ============ */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 16px;
  border-radius:999px;
  border:1px dashed var(--line-strong);
  background:rgba(38,224,255,.07);
  color:#B9ECFF;
  font-size:13px;
  letter-spacing:1.6px;
  margin-bottom:20px;
}
.eyebrow::before{
  content:"";
  width:7px;height:7px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 12px var(--primary);
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(124,92,255,.12);
  color:#C7D8F7;
  font-size:12.5px;
  line-height:1.5;
}
.tag.accent{background:rgba(255,184,107,.14);border-color:rgba(255,184,107,.35);color:#FFD7A6;}
.tag.mint{background:rgba(56,232,160,.12);border-color:rgba(56,232,160,.32);color:#A9F4D4;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}

/* ============ 面包屑 ============ */
.breadcrumb{
  padding:26px 0 0;
  font-size:14px;
  color:var(--muted);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb li[aria-current]{color:#DCEAFF;}

/* ============ 小 Hero ============ */
.page-hero{padding:36px 0 76px;}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:44px;
  align-items:center;
}
.page-hero h1{margin-bottom:18px;}
.page-hero h1 .hl{
  background:linear-gradient(100deg,var(--primary),var(--primary-2) 70%,var(--accent));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:18px;
  color:#C9D9F2;
  max-width:640px;
  margin-bottom:24px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-facts{
  display:flex;
  flex-wrap:wrap;
  gap:14px 28px;
  padding-top:22px;
  border-top:1px dashed var(--line);
}
.hero-facts div{font-size:14px;color:var(--muted);}
.hero-facts strong{display:block;color:#EAF2FF;font-size:18px;}
.hero-media{
  position:relative;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:var(--panel);
  padding:14px;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.hero-media::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(90deg,rgba(120,220,255,.12) 1px,transparent 1px),
    linear-gradient(rgba(120,220,255,.12) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.5;
  pointer-events:none;
}
.hero-media img{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--radius-m);
}
.hero-media .scan{
  position:absolute;
  left:0;right:0;
  height:90px;
  background:linear-gradient(180deg,transparent,rgba(38,224,255,.16),transparent);
  animation:scan 5.5s linear infinite;
  pointer-events:none;
}
@keyframes scan{
  0%{top:-90px;}
  100%{top:100%;}
}
.media-caption{
  position:relative;
  display:flex;
  justify-content:space-between;
  gap:12px;
  margin-top:12px;
  font-size:13px;
  color:var(--muted);
}

/* ============ 板块通用 ============ */
.section{padding:78px 0;}
.section-head{max-width:760px;margin-bottom:42px;}
.section-head p{color:#C4D4EE;margin:0;}
.section-head h2{margin-bottom:14px;}
.hairline{
  height:1px;
  margin:0;
  border:0;
  background:linear-gradient(90deg,transparent,var(--line-strong),transparent);
}

/* ============ 数据条 ============ */
.stats-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  padding:28px;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.stat{padding:6px 4px;}
.stat .value{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:800;
  line-height:1.1;
  color:#fff;
  text-shadow:0 0 22px rgba(38,224,255,.45);
}
.stat .value small{font-size:15px;font-weight:600;color:var(--muted);margin-left:4px;}
.stat .label{margin-top:8px;font-size:14px;color:var(--muted);}
.stat .bar{
  margin-top:14px;
  height:4px;
  border-radius:4px;
  background:rgba(120,220,255,.14);
  overflow:hidden;
}
.stat .bar i{
  display:block;
  height:100%;
  border-radius:4px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  box-shadow:0 0 14px rgba(38,224,255,.6);
}

/* ============ 功能导览：粘性索引 + 卡片列表 ============ */
.func-layout{
  display:grid;
  grid-template-columns:288px 1fr;
  gap:34px;
  align-items:start;
}
.index-card{
  position:sticky;
  top:102px;
  padding:24px;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:var(--panel-strong);
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.index-card h3{font-size:17px;margin-bottom:6px;}
.index-card .hint{font-size:13px;color:var(--muted);margin-bottom:16px;}
.index-list{display:flex;flex-direction:column;gap:4px;}
.index-list a{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:10px 12px;
  border-radius:var(--radius-s);
  border:1px solid transparent;
  color:#C6D6EF;
  font-size:14.5px;
  text-decoration:none;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.index-list a .idx{
  font-size:12px;
  color:var(--primary);
  padding-top:3px;
  flex-shrink:0;
}
.index-list a:hover{
  background:rgba(38,224,255,.09);
  border-color:var(--line);
  color:#fff;
  transform:translateX(3px);
  text-decoration:none;
}
.index-card .tip{
  margin-top:18px;
  padding-top:16px;
  border-top:1px dashed var(--line);
  font-size:13px;
  color:var(--muted);
}

.feature-list{display:flex;flex-direction:column;gap:22px;}
.feature-card{
  display:grid;
  grid-template-columns:168px 1fr;
  gap:22px;
  padding:20px;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
}
.feature-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 24px 54px rgba(0,0,0,.5),0 0 28px rgba(38,224,255,.16);
}
.feature-card img{
  width:100%;
  height:100%;
  min-height:150px;
  object-fit:cover;
  border-radius:var(--radius-m);
}
.feature-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:10px;
}
.feature-no{
  font-size:13px;
  font-weight:700;
  letter-spacing:1px;
  padding:3px 10px;
  border-radius:999px;
  color:#04121C;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
}
.feature-card h3{font-size:20px;margin:0;}
.feature-card p{font-size:15.5px;color:#C4D4EE;margin-bottom:14px;}
.feature-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:14px;
}
.feature-meta b{color:#DCEAFF;font-weight:600;}

/* ============ 场景 ============ */
.scene-grid{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr;
  grid-template-rows:auto auto;
  gap:22px;
}
.scene-card{
  padding:26px;
  border-radius:var(--radius-l);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(24,36,72,.86),rgba(12,20,44,.8));
  backdrop-filter:blur(14px);
  transition:transform .26s ease,border-color .26s ease,box-shadow .26s ease;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.scene-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 24px 54px rgba(0,0,0,.5);
}
.scene-card.large{
  grid-row:span 2;
  padding:0;
  overflow:hidden;
}
.scene-card.large img{
  width:100%;
  height:230px;
  object-fit:cover;
  border-radius:0;
}
.scene-card.large .inner{padding:0 26px 28px;margin-top:-30px;position:relative;}
.scene-card h3{font-size:19px;margin:0;}
.scene-card p{font-size:15px;color:#C4D4EE;margin:0;}
.scene-num{
  font-size:13px;
  letter-spacing:2px;
  color:var(--accent);
}

/* ============ 流程 ============ */
.flow{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
  position:relative;
}
.flow::before{
  content:"";
  position:absolute;
  top:26px;
  left:6%;
  right:6%;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,rgba(38,224,255,.6),rgba(124,92,255,.6));
  box-shadow:0 0 18px rgba(38,224,255,.4);
}
.flow-item{
  position:relative;
  padding:0 6px;
}
.flow-node{
  width:54px;height:54px;
  display:grid;
  place-items:center;
  border-radius:18px;
  margin-bottom:18px;
  border:1px solid var(--line-strong);
  background:var(--panel-strong);
  backdrop-filter:blur(12px);
  color:#fff;
  font-weight:700;
  box-shadow:0 0 22px rgba(38,224,255,.25);
  position:relative;
  z-index:1;
}
.flow-item h3{font-size:18px;margin-bottom:8px;}
.flow-item p{font-size:14.8px;color:#BECFE9;margin:0;}

/* ============ FAQ ============ */
.faq-grid{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:44px;
  align-items:start;
}
.faq-aside p{color:#C4D4EE;}
.faq-aside .mini{
  margin-top:22px;
  padding:18px;
  border-radius:var(--radius-m);
  border:1px dashed var(--line-strong);
  background:rgba(38,224,255,.06);
  font-size:14px;
  color:#BFE9FF;
}
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(12px);
  overflow:hidden;
  transition:border-color .24s ease,box-shadow .24s ease,background-color .24s ease;
}
.faq-item.open{
  border-color:var(--line-strong);
  background:var(--panel-strong);
  box-shadow:0 0 26px rgba(38,224,255,.16);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 22px;
  background:none;
  border:0;
  cursor:pointer;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--text);
}
.faq-q .sign{
  flex-shrink:0;
  width:28px;height:28px;
  display:grid;
  place-items:center;
  border-radius:9px;
  border:1px solid var(--line);
  color:var(--primary);
  font-size:18px;
  line-height:1;
  transition:transform .26s ease,background-color .26s ease;
}
.faq-item.open .sign{
  transform:rotate(45deg);
  background:rgba(38,224,255,.16);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .32s ease;
}
.faq-a .inner{
  padding:0 22px 20px;
  font-size:15.5px;
  color:#C4D4EE;
}
.faq-item.open .faq-a{max-height:420px;}

/* ============ CTA / 联系 ============ */
.cta-band{
  display:grid;
  grid-template-columns:1fr 0.9fr;
  gap:34px;
  padding:38px;
  border-radius:var(--radius-l);
  border:1px solid var(--line-strong);
  background:
    radial-gradient(600px 300px at 8% 0%, rgba(38,224,255,.16), transparent 62%),
    linear-gradient(180deg,rgba(24,36,72,.9),rgba(10,16,38,.92));
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);}
.cta-band p{color:#C4D4EE;}
.cta-band ul{display:flex;flex-direction:column;gap:10px;margin:18px 0 0;}
.cta-band ul li{
  display:flex;
  gap:10px;
  font-size:15px;
  color:#D3E0F5;
}
.cta-band ul li::before{
  content:"▹";
  color:var(--primary);
  flex-shrink:0;
}
.form-card{
  padding:24px;
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:rgba(10,16,38,.7);
}
.field{margin-bottom:14px;}
.field label{
  display:block;
  font-size:13.5px;
  color:var(--muted);
  margin-bottom:7px;
}
.field input,
.field textarea,
.field select{
  width:100%;
  padding:12px 14px;
  border-radius:var(--radius-s);
  border:1px solid var(--line);
  background:rgba(6,12,30,.85);
  color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:96px;resize:vertical;}
.field input::placeholder,
.field textarea::placeholder{color:#6C82A8;}
.field input:focus,
.field textarea:focus,
.field select:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(38,224,255,.16);
}
.form-card .btn{width:100%;}
.form-msg{
  margin-top:12px;
  font-size:14px;
  color:var(--success);
  min-height:22px;
}
.back-home{
  margin-top:26px;
  font-size:14.5px;
  color:var(--muted);
}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:40px;
  padding:64px 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,14,32,.4),rgba(5,8,20,.95));
  position:relative;
  z-index:2;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.65),rgba(124,92,255,.55),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:34px;
  padding-bottom:34px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14.5px;
  color:var(--muted);
  max-width:360px;
}
.footer-col h4{
  font-size:15px;
  color:#EAF2FF;
  margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  color:var(--muted);
  font-size:14.5px;
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-col a:hover{color:var(--primary);padding-left:4px;text-decoration:none;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  justify-content:space-between;
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--muted);
}
.footer-bottom a{color:#A8D9F5;}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1140px;}
}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .page-hero{padding:28px 0 56px;}
  .func-layout{grid-template-columns:1fr;gap:24px;}
  .index-card{position:static;}
  .scene-grid{grid-template-columns:1fr 1fr;}
  .scene-card.large{grid-column:span 2;grid-row:auto;}
  .flow{grid-template-columns:1fr 1fr;gap:26px;}
  .flow::before{display:none;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{grid-template-columns:1fr;padding:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:60px 0;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .brand-text{font-size:15.5px;}
  .brand-sub{font-size:10px;letter-spacing:1px;}
  .stats-strip{grid-template-columns:1fr 1fr;gap:16px;padding:22px;}
  .feature-card{grid-template-columns:1fr;gap:16px;}
  .feature-card img{height:180px;min-height:0;}
  .scene-grid{grid-template-columns:1fr;}
  .scene-card.large{grid-column:span 1;}
  .flow{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .section-head{margin-bottom:30px;}
}
@media (max-width:479px){
  .container{padding:0 16px;}
  .stats-strip{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{padding:16px;font-size:15.5px;}
  .faq-a .inner{padding:0 16px 18px;}
  .mobile-panel{padding:16px 16px 26px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --bg0:#050814;--bg1:#0A1026;--bg2:#101832;
  --panel:rgba(18,28,58,.72);--panel-strong:rgba(24,36,72,.88);
  --line:rgba(120,220,255,.18);--line-strong:rgba(120,220,255,.38);
  --primary:#26E0FF;--primary-2:#7C5CFF;--accent:#FFB86B;
  --success:#38E8A0;--danger:#FF5C7A;
  --text:#EAF2FF;--muted:#8FA3C8;
  --radius-s:12px;--radius-m:18px;--radius-l:24px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --glow:0 0 24px rgba(38,224,255,.35);
  --container:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.8;color:var(--text);
  background:
    radial-gradient(1000px 620px at 12% -12%,rgba(38,224,255,.16),transparent 62%),
    radial-gradient(900px 600px at 88% -4%,rgba(124,92,255,.18),transparent 60%),
    linear-gradient(180deg,var(--bg0) 0%,var(--bg1) 42%,var(--bg0) 100%);
  background-attachment:fixed;
  min-height:100%;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(120,220,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,220,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 12%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 12%,#000 0%,transparent 78%);
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),opacity .25s var(--ease);}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px;}
p{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(38,224,255,.32);color:#fff;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 22px;position:relative;z-index:1;}
.mono{font-variant-numeric:tabular-nums;font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,20,.82);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(38,224,255,.75),rgba(124,92,255,.7),transparent);
  opacity:.85;
}
.nav{display:flex;align-items:center;gap:22px;min-height:76px;}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  font-weight:800;font-size:15px;letter-spacing:.5px;color:#04121c;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:var(--glow);
}
.brand-text{font-size:17px;font-weight:700;line-height:1.2;display:flex;flex-direction:column;gap:2px;}
.brand-sub{font-size:11px;font-weight:500;letter-spacing:1.4px;color:var(--muted);text-transform:uppercase;}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-links a{
  position:relative;display:inline-block;padding:9px 15px;border-radius:999px;
  font-size:15px;font-weight:600;color:#c8d8f5;
}
.nav-links a:hover{color:#fff;background:rgba(120,220,255,.09);}
.nav-links a.active{color:var(--primary);}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:2px;
  width:22px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--primary-2));
  box-shadow:0 0 12px rgba(38,224,255,.8);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.2px;
  transition:transform .22s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.btn:active{transform:translateY(0) scale(.985);}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#04121c;box-shadow:var(--glow);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 34px rgba(38,224,255,.55);color:#04121c;}
.btn-ghost{
  background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text);
}
.btn-ghost:hover{transform:translateY(-1px);border-color:var(--line-strong);background:rgba(120,220,255,.1);}
.btn-small{padding:10px 20px;font-size:14px;}
.nav-cta{margin-left:14px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(120,220,255,.06);margin-left:auto;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s var(--ease),opacity .25s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  display:none;position:fixed;left:0;right:0;top:76px;bottom:0;z-index:55;
  padding:24px 22px 40px;overflow-y:auto;
  background:rgba(5,8,20,.97);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border-top:1px solid var(--line);
  flex-direction:column;gap:6px;
}
.mobile-panel.open{display:flex;}
.mobile-panel a{padding:14px 16px;border-radius:var(--radius-s);font-size:16px;font-weight:600;color:#c8d8f5;border:1px solid transparent;}
.mobile-panel a:hover{background:rgba(120,220,255,.09);color:#fff;}
.mobile-panel a.active{color:var(--primary);border-color:var(--line);background:rgba(38,224,255,.08);}
.mobile-panel .btn{margin-top:14px;justify-content:center;}

/* ============ 页面横幅 ============ */
.page-banner{
  position:relative;padding:64px 0 76px;border-bottom:1px solid var(--line);overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(180deg,rgba(5,8,20,.72),rgba(5,8,20,.94)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.9;
}
.page-banner::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:repeating-linear-gradient(180deg,rgba(38,224,255,.055) 0 1px,transparent 1px 5px);
  mix-blend-mode:screen;opacity:.5;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);margin-bottom:22px;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{opacity:.55;}
.breadcrumb .current{color:#c8d8f5;}
.page-banner h1{font-size:clamp(30px,4.4vw,52px);max-width:18em;}
.page-banner .lead{
  margin-top:20px;max-width:760px;font-size:17px;color:#c2d3ef;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;color:#bfe6ff;
  background:rgba(38,224,255,.09);border:1px solid var(--line);
}
.chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.banner-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:44px;
}
.stat{
  padding:18px 20px;border-radius:var(--radius-m);
  background:var(--panel);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.stat b{display:block;font-size:clamp(22px,2.4vw,30px);font-weight:800;letter-spacing:.5px;
  background:linear-gradient(120deg,var(--primary),var(--primary-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--muted);}
.stat-line{margin-top:14px;height:3px;border-radius:3px;background:rgba(120,220,255,.14);overflow:hidden;}
.stat-line i{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,var(--primary),var(--primary-2));box-shadow:0 0 12px rgba(38,224,255,.7);}

/* ============ 通用板块 ============ */
.section{padding:88px 0;position:relative;}
.section-head{max-width:760px;margin-bottom:46px;}
.section-tag{
  display:inline-block;margin-bottom:16px;padding:5px 14px;border-radius:999px;
  font-size:13px;font-weight:700;letter-spacing:1px;color:var(--primary);
  background:rgba(38,224,255,.08);border:1px solid var(--line);
}
.section h2{font-size:clamp(26px,3vw,40px);}
.section-head p{margin-top:16px;color:var(--muted);font-size:16px;}
.divider{height:1px;border:0;margin:0;background:linear-gradient(90deg,transparent,var(--line-strong),transparent);}

/* ============ 时间线 + 说明 ============ */
.timeline-layout{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:40px;align-items:start;}
.timeline{position:relative;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--primary-2),transparent);
  box-shadow:0 0 14px rgba(38,224,255,.5);
}
.tl-item{position:relative;margin-bottom:20px;}
.tl-item:last-child{margin-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:26px;width:12px;height:12px;border-radius:50%;
  background:var(--bg0);border:2px solid var(--primary);box-shadow:0 0 14px rgba(38,224,255,.8);
}
.tl-card{
  padding:22px 24px;border-radius:var(--radius-m);
  background:var(--panel);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.tl-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow);}
.tl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px;font-size:13px;color:var(--muted);}
.tl-tag{padding:3px 11px;border-radius:999px;font-weight:700;font-size:12px;color:#04121c;background:linear-gradient(135deg,var(--primary),var(--primary-2));}
.tl-card h3{font-size:19px;margin-bottom:8px;}
.tl-card p{color:#c2d3ef;font-size:15.5px;}
.aside-card{
  position:sticky;top:100px;padding:0;border-radius:var(--radius-l);overflow:hidden;
  background:var(--panel-strong);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow);
}
.aside-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-bottom:1px solid var(--line);}
.aside-body{padding:26px 24px 28px;}
.aside-body h3{font-size:20px;margin-bottom:12px;}
.aside-body p{color:#c2d3ef;font-size:15.5px;}
.aside-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.aside-list li{display:flex;gap:10px;font-size:15px;color:#c8d8f5;}
.aside-list li::before{content:"";flex:0 0 auto;margin-top:11px;width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(255,184,107,.7);}

/* ============ 帮助主题卡片 ============ */
.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.topic-card{
  position:relative;padding:28px 28px 26px;border-radius:var(--radius-l);
  background:linear-gradient(160deg,rgba(18,28,58,.82),rgba(10,16,38,.86));
  border:1px solid var(--line);overflow:hidden;
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.topic-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;
  background:radial-gradient(circle,rgba(38,224,255,.22),transparent 70%);
}
.topic-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow);}
.topic-num{
  display:inline-block;margin-bottom:14px;font-size:13px;font-weight:800;letter-spacing:1.5px;
  color:var(--primary);font-variant-numeric:tabular-nums;
}
.topic-card h3{font-size:20px;margin-bottom:10px;}
.topic-card p{color:#c2d3ef;font-size:15.5px;}
.topic-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.topic-tags span{
  padding:4px 11px;border-radius:999px;font-size:12.5px;color:#bfe6ff;
  background:rgba(120,220,255,.09);border:1px solid var(--line);
}

/* ============ 常见问题 ============ */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:44px;align-items:start;}
.faq-intro{position:sticky;top:100px;}
.faq-intro h2{font-size:clamp(26px,3vw,38px);}
.faq-intro p{margin-top:16px;color:var(--muted);font-size:16px;}
.faq-intro .btn{margin-top:24px;}
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  border-radius:var(--radius-m);border:1px solid var(--line);
  background:var(--panel);overflow:hidden;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  transition:border-color .28s var(--ease),background .28s var(--ease),box-shadow .28s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.open{border-color:var(--line-strong);background:var(--panel-strong);box-shadow:var(--shadow);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:20px 22px;font-size:16.5px;font-weight:600;color:var(--text);
  transition:color .25s var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-item.open .faq-q{color:var(--primary);}
.faq-q .plus{
  flex:0 0 auto;margin-left:auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);position:relative;
  transition:transform .3s var(--ease),background .3s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:12px;height:2px;}
.faq-q .plus::after{width:2px;height:12px;transition:transform .3s var(--ease),opacity .3s var(--ease);}
.faq-item.open .plus{transform:rotate(90deg);background:rgba(38,224,255,.14);}
.faq-item.open .plus::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease);}
.faq-a p{padding:0 22px 22px;color:#c2d3ef;font-size:15.5px;}

/* ============ 处理步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.step{
  position:relative;padding:26px 22px;border-radius:var(--radius-m);
  background:var(--panel);border:1px solid var(--line);
  transition:transform .28s var(--ease),border-color .28s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.step b{display:block;font-size:14px;letter-spacing:2px;color:var(--primary);margin-bottom:12px;font-variant-numeric:tabular-nums;}
.step h3{font-size:18px;margin-bottom:8px;}
.step p{color:#c2d3ef;font-size:15px;}
.step::after{
  content:"";position:absolute;right:-11px;top:50%;width:22px;height:1px;
  background:linear-gradient(90deg,var(--line-strong),transparent);
}
.step:last-child::after{display:none;}

/* ============ 结尾 CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  border:1px solid var(--line);padding:52px 46px;
  background:
    linear-gradient(120deg,rgba(18,28,58,.92),rgba(10,16,38,.94)),
    url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  box-shadow:var(--shadow);
}
.cta-panel::after{
  content:"";position:absolute;right:-70px;bottom:-90px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,.32),transparent 68%);
}
.cta-panel h2{font-size:clamp(24px,2.8vw,36px);max-width:20em;}
.cta-panel p{margin-top:16px;max-width:660px;color:#c2d3ef;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;position:relative;z-index:1;}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:rgba(5,8,20,.86);padding:64px 0 28px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:36px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{color:var(--muted);font-size:15px;max-width:340px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:#dce8ff;letter-spacing:.5px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14.5px;color:var(--muted);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:46px;padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);
}
.footer-bottom a{color:#bfe6ff;}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1140px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .timeline-layout{grid-template-columns:1fr;gap:30px;}
  .aside-card{position:static;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .faq-intro{position:static;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step::after{display:none;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .section{padding:60px 0;}
  .page-banner{padding:44px 0 56px;}
  .banner-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
  .topic-grid{grid-template-columns:1fr;}
  .cta-panel{padding:34px 24px;}
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .brand-sub{display:none;}
  .brand-text{font-size:16px;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .timeline{padding-left:26px;}
  .tl-item::before{left:-25px;}
  .tl-card{padding:18px 18px;}
  .aside-body{padding:20px 18px 22px;}
  .faq-q{padding:16px 16px;font-size:15.5px;}
  .faq-a p{padding:0 16px 18px;}
  .chip{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}