/* roulang page: index */
:root{
  --ink-900:#070D18;
  --ink-800:#0B1524;
  --ink-700:#101D30;
  --panel:rgba(255,255,255,.055);
  --panel-strong:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10);
  --line-hot:rgba(47,227,196,.45);
  --brand-500:#2FE3C4;
  --brand-600:#17C4A6;
  --brand-700:#0E9A83;
  --accent-500:#FFB55C;
  --accent-600:#E8952F;
  --text-100:#EAF2FF;
  --text-300:#A9B9D0;
  --text-500:#6E7F99;
  --danger:#FF6B6B;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(47,227,196,.35), 0 12px 32px -12px rgba(47,227,196,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1240px;
}
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-100);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; border:0; }
a{ color:inherit; text-decoration:none; }
button,input,select,textarea{ font-family:inherit; font-size:inherit; color:inherit; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p{ margin:0; }
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{ outline:2px solid var(--brand-500); outline-offset:2px; border-radius:6px; }
.container{ width:100%; max-width:var(--container); margin:0 auto; padding:0 24px; }
.section{ padding:104px 0; position:relative; }
.section-tight{ padding:72px 0; }
.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  padding:7px 16px; border-radius:var(--r-pill);
  border:1px solid var(--line-hot); background:rgba(47,227,196,.08);
  font-size:13px; color:var(--brand-500); letter-spacing:.03em;
}
.eyebrow::before{ content:""; width:6px; height:6px; border-radius:50%; background:var(--brand-500); box-shadow:0 0 10px var(--brand-500); }
.sec-head{ max-width:760px; margin-bottom:44px; }
.sec-head h2{
  font-size:clamp(24px,3.4vw,36px); font-weight:700; letter-spacing:-.01em;
  line-height:1.35; margin:18px 0 14px;
}
.sec-head p{ color:var(--text-300); font-size:16px; }
.sec-head-row{ display:flex; align-items:flex-end; justify-content:space-between; gap:24px; flex-wrap:wrap; margin-bottom:40px; }
.sec-head-row h2{ font-size:clamp(24px,3.4vw,36px); font-weight:700; letter-spacing:-.01em; }
.text-link{ color:var(--text-300); font-size:14.5px; transition:color .22s var(--ease); display:inline-flex; align-items:center; gap:8px; }
.text-link:hover{ color:var(--brand-500); text-decoration:underline; text-underline-offset:4px; }

/* ---------- 倒计时条 ---------- */
.countdown-bar{
  position:sticky; top:0; z-index:80; height:48px;
  background:linear-gradient(90deg, rgba(255,181,92,.16), rgba(255,181,92,.02) 60%, transparent);
  border-bottom:1px solid var(--line);
  display:flex; align-items:center;
}
body.no-cd .countdown-bar{ display:none; }
body.no-cd .site-header{ top:0; }
.cd-inner{ display:flex; align-items:center; gap:18px; width:100%; }
.cd-label{ font-size:13.5px; color:var(--accent-500); display:inline-flex; align-items:center; gap:8px; white-space:nowrap; }
.cd-timer{ display:flex; align-items:center; gap:6px; margin-left:auto; font-variant-numeric:tabular-nums; }
.cd-num{
  font-size:16px; font-weight:800; color:var(--accent-500);
  background:rgba(255,181,92,.12); border:1px solid rgba(255,181,92,.28);
  border-radius:8px; padding:1px 9px; min-width:38px; text-align:center;
  animation:cdPulse 2.4s ease-in-out infinite;
}
.cd-suffix{ font-size:12px; color:var(--text-500); }
@keyframes cdPulse{ 0%,100%{ opacity:1 } 50%{ opacity:.62 } }
.cd-close{
  width:28px; height:28px; border-radius:50%; border:1px solid transparent;
  background:transparent; color:var(--text-500); cursor:pointer;
  display:inline-flex; align-items:center; justify-content:center; transition:all .22s var(--ease);
}
.cd-close:hover{ background:rgba(255,255,255,.08); color:var(--text-100); }

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky; top:48px; z-index:70;
  background:rgba(11,21,36,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-main{ display:flex; align-items:center; gap:28px; height:68px; }
.brand{ display:inline-flex; align-items:center; gap:11px; flex-shrink:0; }
.brand-mark{
  width:24px; height:24px; border-radius:7px; position:relative; flex-shrink:0;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  box-shadow:0 0 0 1px rgba(47,227,196,.45), 0 8px 18px -8px rgba(47,227,196,.8);
  transition:box-shadow .22s var(--ease);
}
.brand-mark::after{ content:""; position:absolute; inset:7px; border:2px solid #05201B; border-radius:3px; }
.brand:hover .brand-mark{ box-shadow:0 0 0 1px rgba(47,227,196,.75), 0 10px 24px -6px rgba(47,227,196,.95); }
.brand-text{ font-size:17px; font-weight:700; letter-spacing:.01em; white-space:nowrap; }
.nav-links{ display:flex; align-items:center; gap:26px; margin-left:6px; }
.nav-links a{ position:relative; font-size:14.5px; color:var(--text-300); padding:22px 0; transition:color .22s var(--ease); }
.nav-links a::after{
  content:""; position:absolute; left:0; right:0; bottom:14px; height:2px; border-radius:2px;
  background:var(--brand-500); transform:scaleX(0); transform-origin:left; transition:transform .22s var(--ease);
}
.nav-links a:hover{ color:var(--text-100); }
.nav-links a:hover::after{ transform:scaleX(1); }
.nav-links a.is-active{ color:var(--brand-500); }
.nav-links a.is-active::after{ transform:scaleX(1); }
.nav-tools{ display:flex; align-items:center; gap:12px; margin-left:auto; }
.cmd-search{
  display:flex; align-items:center; gap:9px; width:260px; height:38px; padding:0 12px;
  border-radius:var(--r-sm); background:rgba(255,255,255,.05); border:1px solid var(--line);
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.cmd-search i{ color:var(--text-500); font-size:13px; }
.cmd-search input{ flex:1; min-width:0; background:transparent; border:0; outline:none; font-size:13.5px; color:var(--text-100); }
.cmd-search input::placeholder{ color:var(--text-500); }
.cmd-search:focus-within{ border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(47,227,196,.14); }
.kbd{
  font-size:11.5px; color:var(--text-500); border:1px solid var(--line);
  border-radius:6px; padding:1px 6px; line-height:1.6; background:rgba(255,255,255,.04);
}
.icon-btn{
  width:38px; height:38px; border-radius:var(--r-sm); border:1px solid var(--line);
  background:var(--panel); color:var(--text-300); cursor:pointer;
  display:inline-flex; align-items:center; justify-content:center; transition:all .22s var(--ease);
}
.icon-btn:hover{ color:var(--brand-500); border-color:var(--line-hot); background:rgba(47,227,196,.08); }
.hamburger{ display:none; width:40px; height:40px; border-radius:var(--r-sm); border:1px solid var(--line); background:var(--panel); color:var(--text-100); cursor:pointer; align-items:center; justify-content:center; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  height:48px; padding:0 26px; border-radius:var(--r-pill);
  font-size:15px; font-weight:700; border:1px solid transparent;
  cursor:pointer; white-space:nowrap; transition:transform .22s var(--ease), filter .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease);
}
.btn-primary{ background:linear-gradient(135deg,var(--brand-500),var(--brand-600)); color:#05201B; }
.btn-primary:hover{ transform:translateY(-1px); filter:brightness(1.06); box-shadow:var(--sh-glow); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{ background:transparent; border-color:var(--line); color:var(--text-100); }
.btn-ghost:hover{ border-color:var(--line-hot); background:rgba(47,227,196,.08); }
.btn-sm{ height:38px; padding:0 18px; font-size:14px; }
.btn-block{ width:100%; }

/* ---------- Hero ---------- */
.hero{ position:relative; padding:96px 0 112px; overflow:hidden; }
.hero::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(760px 420px at 8% 4%, rgba(47,227,196,.10), transparent 62%),
    radial-gradient(700px 440px at 98% 92%, rgba(255,181,92,.08), transparent 62%);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.75;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:radial-gradient(circle at 50% 38%, #000 26%, transparent 76%);
  mask-image:radial-gradient(circle at 50% 38%, #000 26%, transparent 76%);
}
.hero .container{ position:relative; z-index:1; }
.hero-grid{ display:grid; grid-template-columns:7fr 5fr; gap:56px; align-items:center; }
.hero h1{
  font-size:clamp(30px,4.6vw,52px); font-weight:800; letter-spacing:-.015em;
  line-height:1.22; margin:22px 0 18px; max-width:640px;
}
.hero h1 em{ font-style:normal; color:var(--brand-500); }
.hero-sub{ font-size:17px; color:var(--text-300); max-width:560px; line-height:1.9; }
.hero-actions{ display:flex; gap:14px; margin:32px 0 0; flex-wrap:wrap; }
.hero-stats{ display:flex; gap:44px; margin-top:48px; flex-wrap:wrap; }
.hero-stat b{ display:block; font-size:32px; font-weight:800; color:var(--brand-500); font-variant-numeric:tabular-nums; line-height:1.2; }
.hero-stat span{ font-size:13px; color:var(--text-500); }
.hero-visual{ position:relative; }
.hero-img-main{
  position:relative; border-radius:var(--r-lg); overflow:hidden;
  border:1px solid var(--line); box-shadow:var(--sh-card);
}
.hero-img-main::before{
  content:""; position:absolute; top:0; left:0; right:0; height:1px; z-index:2;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
}
.hero-img-main img{ width:100%; height:100%; aspect-ratio:4/3; object-fit:cover; }
.hero-tag{
  position:absolute; top:16px; right:16px; z-index:2;
  background:rgba(7,13,24,.72); backdrop-filter:blur(8px);
  border:1px solid rgba(255,181,92,.4); color:var(--accent-500);
  font-size:12.5px; padding:6px 13px; border-radius:var(--r-pill);
}
.hero-img-float{
  position:absolute; left:-8%; bottom:-8%; width:62%; max-width:300px;
  border-radius:var(--r-md); overflow:hidden; border:1px solid var(--line);
  box-shadow:var(--sh-card); background:var(--ink-700);
}
.hero-img-float img{ width:100%; aspect-ratio:16/9; object-fit:cover; }
.hif-text{ padding:12px 14px; }
.hif-text strong{ display:block; font-size:14px; color:var(--text-100); }
.hif-text span{ font-size:12.5px; color:var(--text-500); }

/* ---------- 卖点区 ---------- */
.feature-grid{ display:grid; grid-template-columns:6fr 6fr; gap:24px; align-items:stretch; }
.feature-side{ display:grid; gap:24px; }
.glass-card{
  position:relative; border-radius:var(--r-lg); border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden; transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.glass-card::before{
  content:""; position:absolute; top:0; left:0; right:0; height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.18), transparent);
}
.glass-card:hover{ transform:translateY(-3px); border-color:rgba(47,227,196,.4); box-shadow:var(--sh-card); }
.feature-main img{ width:100%; aspect-ratio:16/10; object-fit:cover; }
.feature-main .fm-body{ padding:28px 30px 32px; }
.feature-main h3{ font-size:21px; font-weight:700; margin-bottom:12px; }
.feature-main p{ color:var(--text-300); font-size:15.5px; margin-bottom:18px; }
.strip-card{ display:flex; gap:18px; padding:26px 26px; align-items:flex-start; }
.strip-icon{
  width:44px; height:44px; flex-shrink:0; border-radius:12px;
  background:rgba(47,227,196,.10); border:1px solid var(--line-hot);
  color:var(--brand-500); display:flex; align-items:center; justify-content:center; font-size:17px;
}
.strip-card h3{ font-size:17px; font-weight:650; margin-bottom:7px; }
.strip-card p{ font-size:14.5px; color:var(--text-300); }

/* ---------- 图墙 ---------- */
.wall{ display:grid; grid-template-columns:2fr 1fr 1fr; grid-auto-rows:220px; gap:18px; }
.wall-item{ position:relative; border-radius:var(--r-md); overflow:hidden; border:1px solid var(--line); }
.wall-item:nth-child(1){ grid-row:span 2; }
.wall-item img{ width:100%; height:100%; object-fit:cover; transition:transform .4s var(--ease); }
.wall-item:hover img{ transform:scale(1.04); }
.wall-item::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:80px;
  background:linear-gradient(180deg, transparent, rgba(7,13,24,.92));
}
.wall-item:hover::after{ height:100%; background:linear-gradient(180deg, rgba(7,13,24,.12), rgba(7,13,24,.94)); }
.wall-label{ position:absolute; left:16px; bottom:14px; z-index:2; font-size:14.5px; font-weight:650; }
.wall-badge{
  position:absolute; top:14px; right:14px; z-index:2; font-size:12px;
  padding:5px 11px; border-radius:var(--r-pill);
  background:rgba(7,13,24,.7); border:1px solid var(--line); color:var(--text-300);
}

/* ---------- 权益数据条 ---------- */
.data-bar{
  display:grid; grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-lg); border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.025));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;
}
.data-cell{ padding:34px 30px; border-right:1px solid var(--line); }
.data-cell:last-child{ border-right:0; }
.data-cell b{ display:block; font-size:34px; font-weight:800; color:var(--accent-500); font-variant-numeric:tabular-nums; line-height:1.25; }
.data-cell span{ font-size:13.5px; color:var(--text-500); }

/* ---------- CTA 区 ---------- */
.cta-panel{
  position:relative; border-radius:var(--r-xl); border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.028));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden; padding:52px 54px;
}
.cta-panel::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(560px 320px at 12% 0%, rgba(47,227,196,.12), transparent 64%),
    radial-gradient(520px 320px at 100% 100%, rgba(255,181,92,.09), transparent 64%);
}
.cta-grid{ position:relative; z-index:1; display:grid; grid-template-columns:7fr 5fr; gap:48px; }
.cta-panel h2{ font-size:clamp(24px,3.2vw,34px); font-weight:700; line-height:1.35; margin-bottom:14px; }
.cta-panel .cta-desc{ color:var(--text-300); font-size:15.5px; margin-bottom:28px; }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:14px; }
.form-field{ position:relative; }
.form-field input{
  width:100%; height:48px; padding:0 16px; border-radius:var(--r-md);
  background:rgba(255,255,255,.05); border:1px solid var(--line);
  color:var(--text-100); outline:none; font-size:15px;
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.form-field input::placeholder{ color:var(--text-500); }
.form-field input:focus{ border-color:var(--brand-500); box-shadow:0 0 0 3px rgba(47,227,196,.14); }
.code-group{ display:flex; gap:10px; }
.code-group input{ flex:1; }
.code-group .btn{ height:48px; padding:0 18px; font-size:14px; }
.form-note{ font-size:12.5px; color:var(--text-500); margin-top:12px; }
.form-msg{ font-size:13px; margin-top:12px; min-height:18px; }
.form-msg.ok{ color:var(--brand-500); }
.form-msg.err{ color:var(--danger); }
.benefit-list{ display:grid; gap:16px; }
.benefit-list li{ display:flex; gap:12px; font-size:15px; color:var(--text-300); align-items:flex-start; }
.benefit-list i{
  width:22px; height:22px; border-radius:50%; flex-shrink:0; margin-top:4px;
  border:1px solid var(--line-hot); color:var(--brand-500);
  display:inline-flex; align-items:center; justify-content:center; font-size:10.5px;
  background:rgba(47,227,196,.08);
}
.benefit-title{ font-size:16px; font-weight:650; margin-bottom:20px; color:var(--text-100); }

/* ---------- 最新信息 ---------- */
.post-feature{
  display:grid; grid-template-columns:5fr 7fr; gap:0;
  border-radius:var(--r-lg); border:1px solid var(--line); overflow:hidden;
  background:linear-gradient(180deg, rgba(255,255,255,.065), rgba(255,255,255,.025));
  transition:border-color .22s var(--ease), transform .22s var(--ease);
}
.post-feature:hover{ border-color:rgba(47,227,196,.4); transform:translateY(-3px); }
.pf-thumb{ overflow:hidden; }
.pf-thumb img{ width:100%; height:100%; min-height:250px; object-fit:cover; transition:transform .4s var(--ease); }
.post-feature:hover .pf-thumb img{ transform:scale(1.04); }
.pf-body{ padding:34px 36px; display:flex; flex-direction:column; justify-content:center; }
.badge{
  display:inline-flex; align-items:center; align-self:flex-start; gap:6px;
  font-size:12.5px; color:var(--brand-500); background:rgba(47,227,196,.09);
  border:1px solid var(--line-hot); border-radius:var(--r-pill); padding:4px 12px; margin-bottom:14px;
}
.pf-body h3{ font-size:21px; font-weight:700; line-height:1.5; margin-bottom:12px; }
.pf-body h3 a:hover{ color:var(--brand-500); }
.pf-body p{ color:var(--text-300); font-size:15px; margin-bottom:18px; }
.meta{ font-size:13px; color:var(--text-500); display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.meta .dot{ width:4px; height:4px; border-radius:50%; background:var(--text-500); display:inline-block; }
.post-rows{ display:grid; gap:14px; margin-top:20px; }
.post-row{
  display:grid; grid-template-columns:96px 1fr auto; gap:20px; align-items:center;
  padding:14px 20px 14px 14px; border-radius:var(--r-md);
  border:1px solid var(--line); background:var(--panel);
  transition:border-color .22s var(--ease), background .22s var(--ease), transform .22s var(--ease);
}
.post-row:hover{ border-color:rgba(47,227,196,.38); background:rgba(47,227,196,.05); transform:translateX(3px); }
.post-row img{ width:96px; height:72px; border-radius:var(--r-sm); object-fit:cover; }
.post-row h3{ font-size:16px; font-weight:600; line-height:1.5; margin-bottom:7px; }
.post-row:hover h3{ color:var(--brand-500); }
.post-row .row-meta{ font-size:12.5px; color:var(--text-500); }
.post-row .row-arrow{ color:var(--text-500); font-size:14px; transition:color .22s var(--ease), transform .22s var(--ease); }
.post-row:hover .row-arrow{ color:var(--brand-500); transform:translateX(4px); }
.empty-state{
  min-height:240px; border:1px dashed var(--line); border-radius:var(--r-lg);
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:16px;
  background:rgba(255,255,255,.02); text-align:center; padding:32px;
}
.empty-state i{ font-size:34px; color:var(--text-500); }
.empty-state p{ color:var(--text-300); font-size:15px; }

/* ---------- FAQ ---------- */
.faq-list{ border-top:1px solid var(--line); }
.faq-item{ border-bottom:1px solid var(--line); }
.faq-item summary{
  list-style:none; cursor:pointer; padding:24px 0;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  font-size:17px; font-weight:600; color:var(--text-100);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+"; font-size:22px; font-weight:400; color:var(--brand-500);
  line-height:1; transition:transform .22s var(--ease); flex-shrink:0;
}
.faq-item[open] summary::after{ content:"−"; transform:rotate(180deg); }
.faq-item summary:hover{ color:var(--brand-500); }
.faq-item p{ padding:0 0 22px; color:var(--text-300); font-size:15px; line-height:1.85; max-width:860px; }
.faq-cols{ display:grid; grid-template-columns:1fr 1fr; gap:0 56px; }
.faq-cols .faq-list{ border-top:1px solid var(--line); }

/* ---------- 页脚 ---------- */
.site-footer{ background:var(--ink-900); border-top:1px solid var(--line); padding:72px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1.2fr; gap:48px; padding-bottom:52px; }
.footer-brand{ display:inline-flex; align-items:center; gap:11px; margin-bottom:18px; }
.footer-desc{ font-size:14px; color:var(--text-500); line-height:1.9; max-width:340px; }
.footer-col h4{ font-size:14.5px; font-weight:650; color:var(--text-100); margin-bottom:18px; }
.footer-col a{ display:block; font-size:14px; color:var(--text-300); margin-bottom:12px; transition:color .22s var(--ease); }
.footer-col a:hover{ color:var(--brand-500); }
.footer-col p{ font-size:14px; color:var(--text-500); margin-bottom:12px; }
.footer-bottom{
  border-top:1px solid var(--line); padding:22px 0;
  display:flex; align-items:center; justify-content:space-between; gap:18px; flex-wrap:wrap;
  font-size:13px; color:var(--text-500);
}
.footer-bottom-links{ display:flex; gap:22px; }
.footer-bottom-links a:hover{ color:var(--brand-500); }

/* ---------- 抽屉 ---------- */
.drawer-overlay{
  position:fixed; inset:0; z-index:110; background:rgba(4,8,15,.62);
  backdrop-filter:blur(2px); opacity:0; visibility:hidden; transition:opacity .28s var(--ease), visibility .28s var(--ease);
}
.drawer-overlay.open{ opacity:1; visibility:visible; }
.drawer{
  position:fixed; top:0; right:0; z-index:120; width:88%; max-width:380px; height:100%;
  background:var(--ink-800); border-left:1px solid var(--line);
  transform:translateX(100%); transition:transform .3s var(--ease);
  display:flex; flex-direction:column;
}
.drawer.open{ transform:translateX(0); }
.drawer-head{ display:flex; align-items:center; justify-content:space-between; padding:20px 22px; border-bottom:1px solid var(--line); }
.drawer-links{ padding:14px 0; flex:1; }
.drawer-links a{
  display:block; padding:16px 24px; font-size:17px; color:var(--text-300);
  border-left:3px solid transparent; transition:all .22s var(--ease);
}
.drawer-links a:hover{ color:var(--text-100); background:rgba(255,255,255,.04); }
.drawer-links a.is-active{ color:var(--brand-500); border-left-color:var(--brand-500); background:rgba(47,227,196,.06); }
.drawer-foot{ padding:20px 22px; border-top:1px solid var(--line); }

/* ---------- 动效 ---------- */
.reveal{ opacity:0; transform:translateY(12px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; }
  .reveal{ opacity:1; transform:none; }
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.cmd-search{ display:none; }
  .hamburger{ display:inline-flex; }
  .nav-main{ gap:16px; }
  .hero{ padding:68px 0 84px; }
  .hero-grid{ grid-template-columns:1fr; gap:48px; }
  .hero-img-float{ left:auto; right:-4%; bottom:-10%; width:52%; }
  .feature-grid{ grid-template-columns:1fr; }
  .wall{ grid-template-columns:1fr 1fr; grid-auto-rows:200px; }
  .wall-item:nth-child(1){ grid-row:span 2; grid-column:span 2; }
  .data-bar{ grid-template-columns:1fr 1fr; }
  .data-cell:nth-child(2){ border-right:0; }
  .data-cell:nth-child(1),.data-cell:nth-child(2){ border-bottom:1px solid var(--line); }
  .cta-panel{ padding:40px 34px; }
  .cta-grid{ grid-template-columns:1fr; gap:36px; }
  .post-feature{ grid-template-columns:1fr; }
  .pf-thumb img{ min-height:210px; }
  .faq-cols{ grid-template-columns:1fr; gap:0; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:36px; }
  .section{ padding:76px 0; }
}
@media (max-width:639px){
  body{ font-size:16px; }
  .container{ padding:0 16px; }
  .section{ padding:56px 0; }
  .cd-label{ font-size:12.5px; }
  .cd-timer{ gap:4px; }
  .cd-num{ font-size:14px; padding:1px 7px; min-width:32px; }
  .cd-suffix{ display:none; }
  .nav-tools .btn-ghost{ display:none; }
  .hero{ padding:52px 0 68px; }
  .hero-actions .btn{ width:100%; }
  .hero-stats{ gap:26px; }
  .hero-stat b{ font-size:26px; }
  .hero-img-float{ position:static; width:100%; max-width:none; margin-top:14px; }
  .wall{ grid-template-columns:1fr; grid-auto-rows:190px; }
  .wall-item:nth-child(1){ grid-column:span 1; grid-row:span 1; }
  .data-bar{ grid-template-columns:1fr; }
  .data-cell{ border-right:0 !important; border-bottom:1px solid var(--line); padding:26px 22px; }
  .data-cell:last-child{ border-bottom:0; }
  .form-row{ grid-template-columns:1fr; }
  .post-row{ grid-template-columns:72px 1fr; gap:14px; padding:12px 14px; }
  .post-row img{ width:72px; height:56px; }
  .post-row .row-arrow{ display:none; }
  .pf-body{ padding:24px 22px; }
  .cta-panel{ padding:32px 22px; }
  .footer-grid{ grid-template-columns:1fr; gap:32px; padding-bottom:36px; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .sec-head-row{ margin-bottom:28px; }
}

/* roulang page: article */
:root{
  --ink-900:#070D18;
  --ink-800:#0B1524;
  --ink-700:#101D30;
  --panel:rgba(255,255,255,.055);
  --panel-strong:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10);
  --line-hot:rgba(47,227,196,.45);
  --brand-500:#2FE3C4;
  --brand-600:#17C4A6;
  --brand-700:#0E9A83;
  --accent-500:#FFB55C;
  --accent-600:#E8952F;
  --text-100:#EAF2FF;
  --text-300:#A9B9D0;
  --text-500:#6E7F99;
  --danger:#FF6B6B;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(47,227,196,.35), 0 12px 32px -12px rgba(47,227,196,.55);
  --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;
  background:var(--ink-800);
  color:var(--text-300);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-style:none;}
a{color:inherit;text-decoration:none;background-color:transparent;}
a:hover,a:focus{color:var(--brand-500);}
button,input{font-family:inherit;font-size:inherit;color:inherit;outline:none;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
h1,h2,h3,h4{color:var(--text-100);line-height:1.35;}
table{border-collapse:collapse;width:100%;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,21,36,.72);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:28px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  position:relative;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.brand-mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  background:rgba(7,13,24,.9);
}
.brand:hover .brand-mark{box-shadow:0 0 0 4px rgba(47,227,196,.16),0 0 18px rgba(47,227,196,.5);transform:translateY(-1px);}
.brand-text{font-size:17px;font-weight:700;color:var(--text-100);letter-spacing:.01em;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:8px;}
.nav-links a{
  position:relative;
  font-size:14.5px;
  color:var(--text-300);
  padding:6px 0;
  transition:color .22s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--text-100);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand-500);}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  position:relative;display:flex;align-items:center;
  width:260px;height:38px;padding:0 10px 0 34px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.command-search i{position:absolute;left:12px;font-size:13px;color:var(--text-500);}
.command-search input{
  width:100%;border:0;background:transparent;
  font-size:14px;color:var(--text-100);height:100%;
}
.command-search input::placeholder{color:var(--text-500);}
.command-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(47,227,196,.14);}
.kbd{
  font-size:12px;color:var(--text-500);border:1px solid var(--line);
  border-radius:6px;padding:1px 6px;margin-left:8px;white-space:nowrap;
}
.icon-btn{
  width:38px;height:38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-sm);border:1px solid var(--line);color:var(--text-300);
  transition:all .22s var(--ease);
}
.icon-btn:hover{color:var(--brand-500);border-color:var(--line-hot);background:rgba(47,227,196,.08);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:all .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#2FE3C4,#17C4A6);
  color:#05201B;
  box-shadow:0 10px 26px -14px rgba(47,227,196,.8);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:var(--sh-glow);color:#05201B;}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;border:1px solid var(--line);color:var(--text-100);
}
.btn-ghost:hover{border-color:var(--line-hot);background:rgba(47,227,196,.08);color:var(--text-100);}
.btn-sm{min-height:38px;padding:8px 20px;font-size:14px;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}
.hamburger{
  display:none;width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);color:var(--text-100);
  align-items:center;justify-content:center;
}
.hamburger:hover{border-color:var(--line-hot);color:var(--brand-500);}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.6);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease);z-index:90;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;z-index:100;
  background:var(--ink-800);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:18px 20px 0;
}
.drawer-open .drawer{transform:translateX(0);}
.drawer-open .drawer-mask{opacity:1;visibility:visible;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-nav{margin-top:8px;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;height:56px;font-size:17px;color:var(--text-100);
  border-bottom:1px solid var(--line);padding-left:14px;position:relative;
}
.drawer-nav a.is-active{color:var(--brand-500);}
.drawer-nav a.is-active::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--brand-500);
}
.drawer-foot{padding:16px 0 22px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ---------- 页面头部 ---------- */
.page-head{
  position:relative;
  border-bottom:1px solid var(--line);
  padding:34px 0 40px;
  overflow:hidden;
  background:
    radial-gradient(680px 320px at 8% 0%, rgba(47,227,196,.10), transparent 70%),
    radial-gradient(520px 300px at 96% 100%, rgba(255,181,92,.07), transparent 70%),
    linear-gradient(180deg,rgba(255,255,255,.02),transparent);
}
.page-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
}
.page-head .container{position:relative;z-index:2;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-500);}
.breadcrumb a{color:var(--text-500);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .now{color:var(--text-300);}
.article-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line-hot);
  background:rgba(47,227,196,.08);
  color:var(--brand-500);font-size:13px;font-weight:600;
}
.article-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);}
.article-title{
  font-size:clamp(26px,3.6vw,42px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.28;
  margin:18px 0 20px;
  max-width:920px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13.5px;color:var(--text-500);}
.meta-row span{display:inline-flex;align-items:center;gap:7px;}
.meta-row i{color:var(--brand-600);font-size:12px;}

/* ---------- 正文布局 ---------- */
.main-wrap{padding:56px 0 88px;}
.article-grid{display:flex;gap:44px;align-items:flex-start;}
.article-main{flex:1 1 auto;min-width:0;}
.article-body{
  max-width:760px;
  font-size:17px;
  line-height:1.9;
  color:var(--text-300);
  word-wrap:break-word;
  overflow-wrap:break-word;
}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;
  font-size:clamp(21px,2.4vw,26px);
  font-weight:700;
  color:var(--text-100);
  margin:1.9em 0 .8em;
  padding-left:15px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--brand-700));
}
.article-body h3{font-size:18px;font-weight:650;color:var(--text-100);margin:1.6em 0 .6em;}
.article-body h4{font-size:16.5px;font-weight:650;color:var(--text-100);margin:1.4em 0 .5em;}
.article-body strong{color:var(--text-100);font-weight:700;}
.article-body a{color:var(--brand-500);border-bottom:1px solid rgba(47,227,196,.35);}
.article-body a:hover{color:var(--brand-600);border-bottom-color:var(--brand-600);}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.4em;}
.article-body ul li{position:relative;list-style:none;padding-left:16px;margin-bottom:.55em;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-bottom:.55em;padding-left:4px;}
.article-body ol li::marker{color:var(--brand-500);font-variant-numeric:tabular-nums;}
.article-body blockquote{
  margin:1.6em 0;
  padding:16px 20px;
  border-left:3px solid var(--accent-500);
  background:rgba(255,255,255,.04);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--text-300);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-md);margin:1.4em 0;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--text-500);text-align:center;margin-top:10px;}
.article-body table{margin:1.5em 0;font-size:15px;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;}
.article-body thead th{background:rgba(255,255,255,.06);color:var(--text-100);font-weight:650;text-align:left;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);}
.article-body tbody tr:last-child td{border-bottom:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0;}

/* ---------- 文末标签 ---------- */
.article-foot{
  max-width:760px;
  margin-top:40px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--panel);
  font-size:12.5px;color:var(--text-300);
  transition:all .22s var(--ease);
}
.tag:hover{border-color:var(--line-hot);color:var(--brand-500);}
.back-link{font-size:14px;color:var(--text-300);display:inline-flex;align-items:center;gap:8px;}
.back-link:hover{color:var(--brand-500);}

/* ---------- 侧栏 ---------- */
.article-side{flex:0 0 320px;position:sticky;top:92px;}
.side-card{
  position:relative;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px;
  margin-bottom:18px;
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.side-card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.side-card:hover{transform:translateY(-3px);border-color:rgba(47,227,196,.4);box-shadow:var(--sh-card);}
.side-card h3{font-size:16px;margin-bottom:12px;}
.side-card p{font-size:14px;color:var(--text-500);margin-bottom:14px;}
.side-links{display:flex;flex-direction:column;}
.side-links a{
  font-size:14px;color:var(--text-300);padding:10px 0;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  transition:color .22s var(--ease),padding-left .22s var(--ease);
}
.side-links a:last-child{border-bottom:0;}
.side-links a:hover{color:var(--brand-500);padding-left:6px;}
.side-links i{font-size:11px;color:var(--text-500);}
.side-cta{margin-top:4px;}
.side-cta .btn{width:100%;}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0;border-top:1px solid var(--line);background:rgba(255,255,255,.012);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px;flex-wrap:wrap;}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;}
.sec-head .sec-sub{font-size:14px;color:var(--text-500);margin-top:8px;}
.text-link{font-size:14px;color:var(--text-300);display:inline-flex;align-items:center;gap:7px;}
.text-link:hover{color:var(--brand-500);}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(47,227,196,.4);box-shadow:var(--sh-card);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-md) var(--r-md) 0 0;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(7,13,24,.7));}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;font-weight:650;}
.card-body p{font-size:14px;color:var(--text-500);line-height:1.75;}
.card-body .text-link{margin-top:auto;}

/* ---------- 空态 ---------- */
.empty-state{
  min-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;text-align:center;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:48px 24px;
}
.empty-state i{font-size:30px;color:var(--brand-600);}
.empty-state h1{font-size:22px;font-weight:700;}
.empty-state p{font-size:14px;color:var(--text-500);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{font-size:17px;font-weight:700;color:var(--text-100);}
.footer-desc{font-size:14px;color:var(--text-500);line-height:1.85;max-width:340px;}
.footer-col h4{font-size:15px;color:var(--text-100);margin-bottom:16px;font-weight:650;}
.footer-col a,.footer-col p{display:block;font-size:14px;color:var(--text-300);margin-bottom:12px;line-height:1.7;}
.footer-col a:hover{color:var(--brand-500);}
.footer-bottom{
  margin-top:44px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-500);
}
.footer-bottom-links{display:flex;gap:20px;}
.footer-bottom-links a{color:var(--text-500);}
.footer-bottom-links a:hover{color:var(--brand-500);}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .nav-links,.command-search,.nav-tools .btn-ghost{display:none;}
  .hamburger{display:inline-flex;}
  .article-side{display:none;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:767px){
  .container{padding:0 16px;}
  .nav-inner{height:62px;gap:16px;}
  .page-head{padding:24px 0 30px;}
  .main-wrap{padding:40px 0 64px;}
  .related{padding:56px 0;}
  .article-body{font-size:16.5px;line-height:1.85;}
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .site-footer{padding-top:52px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media screen and (max-width:520px){
  .brand-text{font-size:15.5px;}
  .nav-tools{gap:8px;}
  .nav-tools .btn-primary{padding:10px 16px;font-size:14px;min-height:40px;}
  .article-title{font-size:24px;}
  .article-foot{flex-direction:column;align-items:flex-start;}
  .article-foot .back-link{width:100%;}
  .side-card{padding:18px;}
}
@supports not ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){
  .site-header{background:rgba(11,21,36,.96);}
  .side-card,.card{background:rgba(255,255,255,.06);}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink-900:#070D18;
  --ink-800:#0B1524;
  --ink-700:#101D30;
  --panel:rgba(255,255,255,.055);
  --panel-strong:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10);
  --line-hot:rgba(47,227,196,.45);
  --brand-500:#2FE3C4;
  --brand-600:#17C4A6;
  --brand-700:#0E9A83;
  --accent-500:#FFB55C;
  --accent-600:#E8952F;
  --text-100:#EAF2FF;
  --text-300:#A9B9D0;
  --text-500:#6E7F99;
  --danger:#FF6B6B;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(47,227,196,.35), 0 12px 32px -12px rgba(47,227,196,.55);
  --ease:0.22s cubic-bezier(.2,.7,.3,1);
  --maxw:1240px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-300);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0;}
ul,ol{list-style:none;margin:0;padding:0;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-500);}
img{max-width:100%;display:block;border:0;}
button{font-family:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,textarea,select{font-family:inherit;font-size:inherit;}
input[type="search"],input[type="text"],input[type="tel"]{margin:0;height:auto;border:0;box-shadow:none;}
[class*="column"]{padding-left:0;padding-right:0;}
section[id],div[id],article[id]{scroll-margin-top:96px;}

.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:rgba(11,21,36,.72);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  height:68px;
  gap:10px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  position:relative;
  width:24px;
  height:24px;
  border-radius:7px;
  background:linear-gradient(135deg,#2FE3C4,#0E9A83);
  box-shadow:0 0 0 1px rgba(47,227,196,.40);
  transition:var(--ease);
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:5px;
  right:5px;
  top:7px;
  bottom:7px;
  border-top:2px solid rgba(5,32,27,.60);
  border-bottom:2px solid rgba(5,32,27,.60);
}
.brand:hover .brand-mark{
  box-shadow:0 0 0 1px rgba(47,227,196,.75), 0 0 18px rgba(47,227,196,.55);
}
.brand-text{
  font-size:17px;
  font-weight:700;
  color:var(--text-100);
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  margin-left:16px;
  margin-right:auto;
}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:68px;
  padding:0 13px;
  font-size:14.5px;
  color:var(--text-300);
  transition:var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:13px;
  right:13px;
  bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--brand-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
}
.nav-links a:hover{color:var(--text-100);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand-500);}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a:focus-visible{outline:2px solid var(--brand-500);outline-offset:-4px;border-radius:8px;}

.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.command-search{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  width:260px;
  height:38px;
  padding:0 10px;
  border:1px solid var(--line);
  border-radius:10px;
  background:rgba(255,255,255,.04);
  transition:var(--ease);
}
.command-search i{font-size:13px;color:var(--text-500);}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  background:transparent;
  border:0;
  outline:none;
  color:var(--text-100);
  font-size:13.5px;
  line-height:1.6;
}
.command-search input::placeholder{color:var(--text-500);}
.command-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px rgba(47,227,196,.16);
}
.kbd{
  flex:0 0 auto;
  font-size:11px;
  line-height:1.5;
  color:var(--text-500);
  border:1px solid var(--line);
  border-radius:6px;
  padding:0 5px;
}
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--text-300);
  transition:var(--ease);
}
.icon-btn:hover{
  color:var(--brand-500);
  border-color:var(--line-hot);
  background:rgba(47,227,196,.08);
}
.icon-btn:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--ease);
  white-space:nowrap;
  line-height:1;
}
.btn-primary{
  background:linear-gradient(135deg,#2FE3C4,#17C4A6);
  color:#05201B;
  font-weight:700;
  padding:0 28px;
  box-shadow:0 10px 26px -14px rgba(47,227,196,.75);
}
.btn-primary:hover{
  color:#05201B;
  transform:translateY(-1px);
  filter:brightness(1.06);
  box-shadow:var(--sh-glow);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-100);
}
.btn-ghost:hover{
  border-color:var(--line-hot);
  background:rgba(47,227,196,.08);
  color:var(--text-100);
}
.btn-block{width:100%;}
.btn:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  color:var(--text-300);
  border-bottom:1px solid transparent;
  transition:var(--ease);
}
.text-link:hover{
  color:var(--brand-500);
  border-bottom-color:var(--brand-500);
}

/* ============ 移动抽屉 ============ */
.hamburger{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--text-100);
  transition:var(--ease);
}
.hamburger:hover{border-color:var(--line-hot);color:var(--brand-500);}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(3,7,14,.62);
  opacity:0;
  pointer-events:none;
  transition:opacity var(--ease);
  z-index:85;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:88%;
  max-width:380px;
  background:var(--ink-800);
  border-left:1px solid var(--line);
  transform:translateX(105%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  z-index:90;
  display:flex;
  flex-direction:column;
  padding:20px 22px 24px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  width:36px;
  height:36px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--text-300);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:var(--ease);
}
.drawer-close:hover{color:var(--brand-500);border-color:var(--line-hot);}
.drawer-nav{flex:1 1 auto;padding-top:12px;overflow-y:auto;}
.drawer-nav a{
  display:flex;
  align-items:center;
  height:56px;
  padding-left:14px;
  font-size:17px;
  color:var(--text-300);
  border-left:3px solid transparent;
  transition:var(--ease);
}
.drawer-nav a:hover{color:var(--text-100);background:rgba(255,255,255,.04);}
.drawer-nav a.is-active{
  color:var(--brand-500);
  border-left-color:var(--brand-500);
  background:rgba(47,227,196,.07);
}
.drawer-cta{padding-top:18px;border-top:1px solid var(--line);}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:52px 0 60px;
  border-bottom:1px solid var(--line);
  background:var(--ink-800);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    radial-gradient(circle at 10% 6%, rgba(47,227,196,.15), transparent 46%),
    radial-gradient(circle at 90% 94%, rgba(255,181,92,.10), transparent 46%);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:radial-gradient(circle at 50% 40%, #000 0%, transparent 78%);
  mask-image:radial-gradient(circle at 50% 40%, #000 0%, transparent 78%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1;}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-500);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-500);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{opacity:.5;}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-hot);
  background:rgba(47,227,196,.08);
  color:var(--brand-500);
  font-size:13px;
  font-weight:600;
  margin-bottom:18px;
}
.pill::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--brand-500);
}

.page-hero h1{
  font-size:clamp(28px,4vw,44px);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--text-100);
  max-width:640px;
}
.hero-lead{
  margin-top:18px;
  font-size:17px;
  color:var(--text-300);
  max-width:560px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.hero-tags span{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  font-size:13px;
  color:var(--text-300);
}
.hero-visual{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:28px 28px 28px 72px;
  box-shadow:var(--sh-card);
  background:var(--ink-700);
}
.hero-visual img{
  width:100%;
  height:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.3,1);
}
.hero-visual:hover img{transform:scale(1.03);}
.hero-visual .visual-badge{
  position:absolute;
  right:16px;
  top:16px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:rgba(7,13,24,.72);
  border:1px solid var(--line-hot);
  color:var(--brand-500);
  font-size:12.5px;
  font-weight:600;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}

/* ============ 通用栅格间距 ============ */
.grid-x.row-gap{margin-left:-16px;margin-right:-16px;}
.grid-x.row-gap > .cell{padding-left:16px;padding-right:16px;}

/* ============ 板块 ============ */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-head{margin-bottom:40px;}
.section-head h2{
  font-size:clamp(24px,3.4vw,36px);
  font-weight:700;
  color:var(--text-100);
  line-height:1.3;
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--text-300);
  max-width:720px;
}

/* ============ 正文模块 ============ */
.main-col{min-width:0;}
.content-block::after{content:"";display:block;clear:both;}
.content-block + .content-block{
  margin-top:56px;
  padding-top:56px;
  border-top:1px solid var(--line);
}
.content-block h2{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:clamp(21px,2.6vw,29px);
  font-weight:700;
  color:var(--text-100);
  line-height:1.35;
  margin-bottom:20px;
}
.content-block h2::before{
  content:"";
  flex:0 0 auto;
  width:4px;
  height:22px;
  border-radius:2px;
  background:linear-gradient(180deg,#2FE3C4,#0E9A83);
}
.content-block p{
  font-size:16.5px;
  color:var(--text-300);
}
.content-block p + p{margin-top:16px;}
.content-block h3{
  font-size:18px;
  font-weight:650;
  color:var(--text-100);
  margin:26px 0 10px;
}

.figure-float-right{
  float:right;
  width:44%;
  margin:6px 0 24px 30px;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--ink-700);
}
.figure-float-left{
  float:left;
  width:44%;
  margin:6px 30px 24px 0;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--ink-700);
}
.figure-float-right img,
.figure-float-left img{
  width:100%;
  aspect-ratio:4 / 3;
  object-fit:cover;
  transition:transform .4s cubic-bezier(.2,.7,.3,1);
}
.figure-float-right:hover img,
.figure-float-left:hover img{transform:scale(1.04);}
.figure-caption{
  font-size:13px;
  color:var(--text-500);
  padding:10px 14px 12px;
  line-height:1.7;
  background:rgba(255,255,255,.03);
}

.check-list{margin-top:20px;}
.check-list li{
  position:relative;
  padding-left:34px;
  margin-top:14px;
  font-size:16px;
  color:var(--text-300);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  width:20px;
  height:20px;
  border-radius:50%;
  border:1.5px solid var(--brand-500);
  background:rgba(47,227,196,.10);
}
.check-list li::after{
  content:"";
  position:absolute;
  left:7px;
  top:11px;
  width:6px;
  height:3px;
  border-left:2px solid var(--brand-500);
  border-bottom:2px solid var(--brand-500);
  transform:rotate(-45deg);
}

/* ============ 步骤 ============ */
.steps{
  display:grid;
  gap:16px;
  margin-top:24px;
}
.step{
  position:relative;
  padding:22px 24px 22px 76px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  transition:var(--ease);
}
.step::before{
  counter-increment:stepnum;
  content:"0" counter(stepnum);
  position:absolute;
  left:24px;
  top:22px;
  font-size:19px;
  font-weight:800;
  color:var(--brand-500);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.steps{counter-reset:stepnum;}
.step:hover{
  transform:translateY(-3px);
  border-color:var(--line-hot);
  box-shadow:var(--sh-card);
}
.step h3{
  font-size:18px;
  font-weight:650;
  color:var(--text-100);
  margin-bottom:6px;
}
.step p{font-size:15px;color:var(--text-300);}

/* ============ 侧栏 ============ */
.side-col{min-width:0;}
.sticky-wrap{position:sticky;top:92px;}
.side-card{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  padding:22px;
  margin-bottom:20px;
}
.side-card h3{
  font-size:16px;
  font-weight:700;
  color:var(--text-100);
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:9px;
}
.side-card h3 i{color:var(--brand-500);font-size:14px;}
.anchor-nav a{
  display:block;
  padding:10px 12px;
  border-radius:var(--r-sm);
  border-left:2px solid transparent;
  font-size:14.5px;
  color:var(--text-300);
  transition:var(--ease);
}
.anchor-nav a:hover{background:rgba(255,255,255,.05);color:var(--text-100);}
.anchor-nav a.is-current{
  color:var(--brand-500);
  border-left-color:var(--brand-500);
  background:rgba(47,227,196,.08);
}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:11px 0;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
  color:var(--text-300);
  transition:var(--ease);
}
.side-links a:last-child{border-bottom:0;}
.side-links a:hover{color:var(--brand-500);}
.side-links a i{font-size:12px;color:var(--text-500);transition:var(--ease);}
.side-links a:hover i{color:var(--brand-500);transform:translateX(3px);}
.side-card-cta{
  background:linear-gradient(160deg, rgba(47,227,196,.13), rgba(255,181,92,.07));
  border-color:var(--line-hot);
}
.side-card-cta p{
  font-size:14.5px;
  color:var(--text-300);
  margin-bottom:18px;
}
.side-card-cta .btn{margin-top:10px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item:first-of-type{border-top:1px solid var(--line);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:600;
  color:var(--text-100);
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  width:28px;
  text-align:center;
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--brand-500);
  transition:transform var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item summary:hover{color:var(--brand-500);}
.faq-item summary:focus-visible{outline:2px solid var(--brand-500);outline-offset:-4px;border-radius:8px;}
.faq-body{
  padding:0 40px 22px 0;
  font-size:15px;
  color:var(--text-300);
  max-width:760px;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-hot);
  border-radius:var(--r-xl);
  padding:48px 44px;
  background:linear-gradient(135deg, rgba(47,227,196,.12), rgba(255,181,92,.07));
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:radial-gradient(circle at 30% 30%, #000 0%, transparent 80%);
  mask-image:radial-gradient(circle at 30% 30%, #000 0%, transparent 80%);
  pointer-events:none;
}
.cta-band .cta-inner{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.cta-band h2{
  font-size:clamp(22px,2.8vw,32px);
  font-weight:700;
  color:var(--text-100);
  line-height:1.35;
}
.cta-band p{
  margin-top:12px;
  font-size:16px;
  color:var(--text-300);
  max-width:620px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

/* ============ 数据条 ============ */
.fact-band{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  display:grid;
  grid-template-columns:repeat(4,1fr);
  padding:28px 8px;
}
.fact-item{
  padding:0 22px;
  border-right:1px solid var(--line);
}
.fact-item:last-child{border-right:0;}
.fact-item .num{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:800;
  color:var(--accent-500);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.fact-item .label{
  margin-top:6px;
  font-size:13px;
  color:var(--text-500);
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding-top:64px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand .brand-text{font-size:16px;}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:var(--text-500);
  max-width:330px;
}
.footer-col h4{
  font-size:15px;
  font-weight:650;
  color:var(--text-100);
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:var(--text-300);
  margin-bottom:12px;
  transition:var(--ease);
}
.footer-col a:hover{color:var(--brand-500);}
.footer-col p{
  font-size:14px;
  color:var(--text-300);
  margin-bottom:10px;
  line-height:1.8;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:48px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-500);
}
.footer-bottom-links{display:flex;gap:18px;}
.footer-bottom-links a{color:var(--text-500);}
.footer-bottom-links a:hover{color:var(--brand-500);}

/* ============ 滚动入场 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s cubic-bezier(.2,.7,.3,1), transform .5s cubic-bezier(.2,.7,.3,1);
}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-links{display:none;}
  .command-search{display:none;}
  .icon-btn{display:none;}
  .header-actions .btn{display:none;}
  .hamburger{display:inline-flex;}
  .header-inner{justify-content:space-between;}
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .page-hero{padding:44px 0 52px;}
  .sticky-wrap{position:static;}
  .figure-float-right,
  .figure-float-left{
    float:none;
    width:100%;
    margin:0 0 22px 0;
  }
  .hero-visual{margin-top:32px;border-radius:22px 22px 22px 52px;}
  .fact-band{grid-template-columns:repeat(2,1fr);row-gap:24px;padding:24px 8px;}
  .fact-item:nth-child(2){border-right:0;}
  .fact-item:nth-child(1),
  .fact-item:nth-child(2){padding-bottom:20px;border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:639px){
  body{font-size:16px;}
  .container{padding-left:16px;padding-right:16px;}
  .grid-x.row-gap{margin-left:-8px;margin-right:-8px;}
  .grid-x.row-gap > .cell{padding-left:8px;padding-right:8px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .page-hero{padding:36px 0 44px;}
  .page-hero h1{font-size:clamp(24px,7vw,32px);}
  .hero-lead{font-size:15.5px;}
  .content-block + .content-block{margin-top:44px;padding-top:44px;}
  .step{padding:20px 18px 20px 18px;}
  .step::before{
    position:static;
    display:block;
    margin-bottom:6px;
  }
  .step h3{font-size:17px;}
  .cta-band{padding:32px 22px;border-radius:var(--r-lg);}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .fact-band{grid-template-columns:1fr;}
  .fact-item{border-right:0;border-bottom:1px solid var(--line);padding:16px 22px;}
  .fact-item:last-child{border-bottom:0;}
  .fact-item:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-item summary{font-size:16px;}
  .faq-body{padding-right:0;}
}

@media (prefers-reduced-motion: reduce){
  *{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink-900:#070D18;
  --ink-800:#0B1524;
  --ink-700:#101D30;
  --panel:rgba(255,255,255,.055);
  --panel-strong:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.10);
  --line-hot:rgba(47,227,196,.45);
  --brand-500:#2FE3C4;
  --brand-600:#17C4A6;
  --brand-700:#0E9A83;
  --accent-500:#FFB55C;
  --accent-600:#E8952F;
  --text-100:#EAF2FF;
  --text-300:#A9B9D0;
  --text-500:#6E7F99;
  --danger:#FF6B6B;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:28px;
  --r-pill:999px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.85);
  --sh-glow:0 0 0 1px rgba(47,227,196,.35),0 12px 32px -12px rgba(47,227,196,.55);
  --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;
  background:var(--ink-800);
  color:var(--text-300);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--text-300);text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);}
a:hover{color:var(--brand-500);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--text-100);margin:0;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
.section{padding:104px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{font-size:clamp(24px,3.4vw,36px);font-weight:700;line-height:1.35;}
.section-head p{margin-top:14px;color:var(--text-300);font-size:16.5px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border:1px solid var(--line-hot);border-radius:var(--r-pill);
  font-size:13px;color:var(--brand-500);background:rgba(47,227,196,.07);letter-spacing:.02em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 8px var(--brand-500);}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:13px 28px;border:0;border-radius:var(--r-pill);
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  color:#05201B;font-size:15.5px;font-weight:700;line-height:1.2;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:var(--sh-glow);color:#05201B;}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:13px 24px;border:1px solid var(--line);border-radius:var(--r-pill);
  background:transparent;color:var(--text-100);font-size:15px;font-weight:600;cursor:pointer;
  transition:border-color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease);
}
.btn-ghost:hover{border-color:var(--line-hot);background:rgba(47,227,196,.08);color:var(--text-100);}
.btn-ghost:active{transform:translateY(1px);}
.btn-block{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-500);font-size:15px;font-weight:600;}
.link-arrow::after{content:"→";transition:transform .22s var(--ease);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,21,36,.72);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:26px;height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  position:relative;width:24px;height:24px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  box-shadow:0 0 0 1px rgba(47,227,196,.35);
  transition:box-shadow .22s var(--ease);
}
.brand-mark::after{content:"";position:absolute;inset:7px;border:2px solid rgba(5,32,27,.85);border-radius:3px;}
.brand:hover .brand-mark{box-shadow:0 0 0 1px rgba(47,227,196,.75),0 0 16px rgba(47,227,196,.55);}
.brand-text{font-size:17px;font-weight:700;color:var(--text-100);letter-spacing:.01em;}
.nav-links{display:flex;align-items:center;gap:24px;}
.nav-links a{position:relative;font-size:14.5px;line-height:68px;color:var(--text-300);white-space:nowrap;}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:16px;width:0;height:2px;border-radius:2px;
  background:var(--brand-500);transition:width .22s var(--ease);
}
.nav-links a:hover{color:var(--text-100);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--brand-500);}
.nav-links a.is-active::after{width:100%;}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.command-search{
  display:flex;align-items:center;gap:8px;width:260px;height:38px;padding:0 12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:var(--r-sm);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.command-search:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(47,227,196,.16);}
.command-search svg{flex-shrink:0;opacity:.7;}
.command-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:0;
  color:var(--text-100);font-size:14px;
}
.command-search input::placeholder{color:var(--text-500);}
.kbd{
  font-size:12px;color:var(--text-500);border:1px solid var(--line);border-radius:6px;
  padding:1px 6px;line-height:1.5;flex-shrink:0;
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:transparent;color:var(--text-300);cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease);
}
.icon-btn:hover{border-color:var(--line-hot);color:var(--brand-500);background:rgba(47,227,196,.07);}
.btn-login{
  display:inline-flex;align-items:center;height:40px;padding:0 18px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:transparent;color:var(--text-100);font-size:14.5px;font-weight:600;cursor:pointer;
  transition:border-color .22s var(--ease),background-color .22s var(--ease);
}
.btn-login:hover{border-color:var(--line-hot);background:rgba(47,227,196,.08);color:var(--text-100);}
.btn-cta-nav{
  display:inline-flex;align-items:center;height:40px;padding:0 20px;border-radius:var(--r-pill);
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  color:#05201B;font-size:14.5px;font-weight:700;
  transition:filter .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.btn-cta-nav:hover{color:#05201B;filter:brightness(1.06);box-shadow:var(--sh-glow);transform:translateY(-1px);}
.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);background:transparent;color:var(--text-100);cursor:pointer;align-items:center;justify-content:center;}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,7,14,.68);opacity:0;visibility:hidden;
  transition:opacity .28s var(--ease),visibility .28s var(--ease);z-index:110;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:88%;max-width:360px;z-index:120;
  background:var(--ink-800);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line);}
.drawer-nav{padding:12px 0;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;height:56px;padding:0 20px;font-size:17px;color:var(--text-100);
  border-left:3px solid transparent;
}
.drawer-nav a.is-active{border-left-color:var(--brand-500);color:var(--brand-500);background:rgba(47,227,196,.06);}
.drawer-foot{padding:16px 20px 24px;border-top:1px solid var(--line);}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);background:transparent;color:var(--text-100);cursor:pointer;font-size:18px;line-height:1;}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;padding:64px 0 72px;
  background:
    radial-gradient(900px 420px at 10% -12%,rgba(47,227,196,.10),transparent 70%),
    radial-gradient(720px 380px at 100% 112%,rgba(255,181,92,.08),transparent 70%),
    var(--ink-800);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.75;
}
.page-hero > *{position:relative;z-index:1;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-500);margin-bottom:22px;}
.breadcrumb a{color:var(--text-500);}
.breadcrumb a:hover{color:var(--brand-500);}
.breadcrumb .sep{opacity:.5;}
.page-hero h1{
  font-size:clamp(30px,5vw,52px);font-weight:800;line-height:1.2;margin:18px 0 16px;letter-spacing:-.01em;
}
.hero-lead{font-size:17px;color:var(--text-300);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:40px;padding-top:26px;border-top:1px solid var(--line);}
.hero-stats .num{font-size:30px;font-weight:800;color:var(--brand-500);font-variant-numeric:tabular-nums;line-height:1.2;}
.hero-stats .lab{font-size:13px;color:var(--text-500);margin-top:2px;}
.hero-figure{
  margin:0;border-radius:var(--r-lg);overflow:hidden;position:relative;
  border:1px solid var(--line);box-shadow:var(--sh-card);
}
.hero-figure::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
}
.hero-figure img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 20px;font-size:13px;color:var(--text-100);
  background:linear-gradient(180deg,transparent,rgba(7,13,24,.88));
}
.hero-badge{
  position:absolute;top:16px;right:16px;padding:6px 12px;border-radius:var(--r-pill);
  background:rgba(255,181,92,.16);border:1px solid rgba(255,181,92,.45);
  color:var(--accent-500);font-size:12.5px;font-weight:700;
}

/* ---------- 快捷三格 ---------- */
.quick-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.quick-card{
  display:block;padding:22px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.quick-card:hover{transform:translateY(-3px);border-color:rgba(47,227,196,.4);box-shadow:var(--sh-card);color:inherit;}
.quick-card .thumb{border-radius:var(--r-md);overflow:hidden;margin-bottom:16px;border:1px solid var(--line);}
.quick-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease);}
.quick-card:hover .thumb img{transform:scale(1.04);}
.quick-card h3{font-size:19px;font-weight:650;margin-bottom:8px;}
.quick-card p{font-size:14.5px;color:var(--text-300);line-height:1.75;}
.quick-card .tagline{display:inline-flex;margin-top:14px;font-size:13px;color:var(--brand-500);font-weight:600;}

/* ---------- 图文模块 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split + .split{margin-top:88px;}
.split-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card);
}
.split-media::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;z-index:2;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split.reverse .split-media{order:2;}
.split-body h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.35;margin-bottom:16px;}
.split-body p{font-size:16.5px;color:var(--text-300);}
.check-list{margin-top:22px;display:grid;gap:14px;}
.check-list li{display:flex;gap:12px;font-size:15.5px;color:var(--text-300);line-height:1.7;}
.check-list li::before{
  content:"✓";flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;
  width:22px;height:22px;margin-top:3px;border-radius:50%;
  border:1px solid var(--line-hot);color:var(--brand-500);font-size:12px;font-weight:700;
  background:rgba(47,227,196,.08);
}
.mini-note{
  margin-top:20px;padding:14px 18px;border-left:3px solid var(--accent-500);
  background:rgba(255,255,255,.04);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:14.5px;color:var(--text-300);
}

/* ---------- 数据条 ---------- */
.stat-section{padding:0 0 104px;}
.stat-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
}
.stat-bar > div{padding:30px 26px;border-right:1px solid var(--line);}
.stat-bar > div:last-child{border-right:0;}
.stat-bar .num{font-size:32px;font-weight:800;color:var(--accent-500);font-variant-numeric:tabular-nums;line-height:1.15;}
.stat-bar .lab{font-size:13.5px;color:var(--text-500);margin-top:8px;}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{
  position:relative;padding:26px 22px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.step:hover{border-color:rgba(47,227,196,.4);transform:translateY(-3px);}
.step .idx{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--r-sm);
  background:rgba(47,227,196,.12);border:1px solid var(--line-hot);color:var(--brand-500);
  font-size:14px;font-weight:800;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17.5px;font-weight:650;margin:16px 0 8px;}
.step p{font-size:14.5px;color:var(--text-300);line-height:1.75;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:22px 46px 22px 0;font-size:17px;font-weight:600;color:var(--text-100);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand-500);}
.faq-item summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--text-500);line-height:1;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq-item[open] summary{color:var(--brand-500);}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--brand-500);}
.faq-item .answer{padding:0 46px 22px 0;font-size:15px;line-height:1.85;color:var(--text-300);}

/* ---------- 底部 CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-xl);
  padding:52px;background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.025));
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(600px 300px at 0% 0%,rgba(47,227,196,.10),transparent 70%),
    radial-gradient(520px 260px at 100% 100%,rgba(255,181,92,.10),transparent 70%);
}
.cta-band > *{position:relative;z-index:1;}
.cta-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:start;}
.cta-grid h2{font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.35;margin-bottom:14px;}
.cta-grid p.lead{font-size:16px;color:var(--text-300);}
.cta-form{display:grid;gap:14px;}
.form-row{display:flex;gap:12px;}
.cta-form input{
  flex:1;min-width:0;height:48px;padding:0 16px;border-radius:var(--r-md);
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text-100);font-size:15px;outline:0;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.cta-form input::placeholder{color:var(--text-500);}
.cta-form input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(47,227,196,.16);}
.btn-code{
  height:48px;min-height:48px;padding:0 18px;border-radius:var(--r-md);flex-shrink:0;
  font-size:14px;
}
.form-tip{font-size:13px;color:var(--text-500);line-height:1.7;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);margin-top:104px;padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-text{font-size:16.5px;font-weight:700;color:var(--text-100);}
.footer-desc{font-size:14px;color:var(--text-500);line-height:1.85;max-width:340px;}
.footer-col h4{font-size:14.5px;font-weight:700;color:var(--text-100);margin-bottom:16px;letter-spacing:.02em;}
.footer-col a{display:block;font-size:14px;color:var(--text-300);margin-bottom:12px;}
.footer-col a:hover{color:var(--brand-500);}
.footer-col p{font-size:14px;color:var(--text-500);line-height:1.8;margin-bottom:10px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding:20px 0 28px;font-size:13px;color:var(--text-500);
}
.footer-bottom-links{display:flex;gap:20px;}
.footer-bottom-links a{color:var(--text-500);font-size:13px;}
.footer-bottom-links a:hover{color:var(--brand-500);}

/* ---------- 入场动画 ---------- */
.reveal-up{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal-up.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.command-search,.btn-login{display:none;}
  .nav-toggle{display:inline-flex;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .page-hero{padding:48px 0 56px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split.reverse .split-media{order:0;}
  .split + .split{margin-top:64px;}
  .quick-nav{grid-template-columns:1fr 1fr;}
  .quick-nav .quick-card:first-child{grid-column:1 / -1;}
  .stat-bar{grid-template-columns:repeat(2,1fr);}
  .stat-bar > div:nth-child(2){border-right:0;}
  .stat-bar > div:nth-child(1),.stat-bar > div:nth-child(2){border-bottom:1px solid var(--line);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .cta-grid{grid-template-columns:1fr;gap:32px;}
  .cta-band{padding:34px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stat-section{padding-bottom:72px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .nav-inner{gap:14px;height:62px;}
  .brand-text{font-size:15.5px;}
  .btn-cta-nav{display:none;}
  .quick-nav{grid-template-columns:1fr;}
  .quick-nav .quick-card:first-child{grid-column:auto;}
  .stat-bar{grid-template-columns:1fr;}
  .stat-bar > div{border-right:0;border-bottom:1px solid var(--line);}
  .stat-bar > div:last-child{border-bottom:0;}
  .steps{grid-template-columns:1fr;}
  .hero-stats{gap:24px;}
  .hero-stats .num{font-size:26px;}
  .form-row{flex-direction:column;}
  .btn-code{width:100%;}
  .cta-band{padding:26px 18px;border-radius:var(--r-lg);}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .site-footer{margin-top:56px;padding-top:44px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}