:root{
  --primary:#2980FE;
  --primary-dark:#1267df;
  --bg:#ffffff;
  --soft:#f5f8fc;
  --soft-blue:#eef6ff;
  --line:#e4eaf2;
  --text:#202938;
  --muted:#667085;
  --deep:#111827;
  --card:#ffffff;
  --shadow:0 18px 45px rgba(32,41,56,.08);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Noto Sans TC","Microsoft JhengHei",Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#fff 0%,#f7fbff 42%,#fff 100%);line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1120px,calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--deep);letter-spacing:.02em}
.logo img,.footer-logo img{width:38px;height:38px;object-fit:contain;border-radius:12px}
.site-nav{display:none;position:absolute;left:18px;right:18px;top:72px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:12px}
.site-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.site-nav a{padding:10px 12px;border-radius:14px;color:#4b5565;font-weight:650;font-size:14px}
.site-nav a.active,.site-nav a:hover{background:var(--soft-blue);color:var(--primary)}
.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:14px;width:44px;height:44px;font-size:22px;color:var(--primary)}
.section{padding:64px 0}
.section-sm{padding:42px 0}
.eyebrow,.category-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;background:var(--soft-blue);color:var(--primary);border:1px solid rgba(41,128,254,.16);border-radius:999px;font-weight:800;font-size:13px;margin-bottom:16px}
h1,h2,h3{line-height:1.2;color:var(--deep);margin:0 0 16px}
h1{font-size:clamp(34px,8vw,64px);letter-spacing:-.04em}
h2{font-size:clamp(28px,5vw,42px);letter-spacing:-.025em}
h3{font-size:22px}
p{margin:0 0 16px;color:var(--muted)}
.lead{font-size:18px;color:#4b5565;max-width:760px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 24px;border-radius:999px;background:var(--primary);color:#fff;font-weight:800;box-shadow:0 14px 28px rgba(41,128,254,.24);transition:.2s ease;border:0;white-space:nowrap}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark);color:#fff}
.text-link{color:var(--primary);font-weight:800;display:inline-flex;align-items:center;gap:6px}
.text-link:after{content:'›';font-size:18px}
.portal-hero{padding:54px 0 34px;position:relative;overflow:hidden}
.portal-hero:before{content:'';position:absolute;inset:-140px -160px auto auto;width:460px;height:460px;background:radial-gradient(circle,rgba(41,128,254,.18),transparent 68%);pointer-events:none}
.hero-grid{display:grid;gap:34px;align-items:center}
.hero-copy{position:relative;z-index:1}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:28px 0}
.hero-tags,.mini-tags{display:flex;gap:10px;flex-wrap:wrap}
.hero-tags span,.mini-tags span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#526071;font-size:13px;font-weight:700}
.hero-visual{position:relative;min-height:360px;display:grid;place-items:center;padding:26px;border-radius:32px;background:linear-gradient(145deg,#f9fcff,#edf6ff);border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.hero-visual:after{content:'';position:absolute;width:290px;height:290px;border:1px solid rgba(41,128,254,.18);border-radius:50%;background:rgba(41,128,254,.04)}
.hero-visual img{position:relative;z-index:2;max-height:360px;object-fit:contain;filter:drop-shadow(0 26px 38px rgba(32,41,56,.12))}
.float-card{position:absolute;z-index:3;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:18px;padding:12px 14px;box-shadow:0 16px 30px rgba(32,41,56,.08);font-size:13px;color:#526071;font-weight:750;backdrop-filter:blur(10px)}
.float-card strong{display:block;color:var(--deep);font-size:15px}
.float-asset{left:18px;top:20px}.float-cold{right:18px;top:72px}.float-swap{left:26px;bottom:48px}.float-dapp{right:20px;bottom:24px}
.channel-nav{display:grid;gap:14px;margin-top:20px}
.channel-card,.ecosystem-card,.feature-card,.risk-card,.faq-item,.info-card,.aside-card,.step-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 14px 30px rgba(32,41,56,.05)}
.channel-card{padding:20px;position:relative;overflow:hidden}
.channel-card:before{content:'';position:absolute;left:0;top:0;height:4px;width:100%;background:linear-gradient(90deg,var(--primary),rgba(41,128,254,.18))}
.channel-card span{display:inline-flex;margin-bottom:12px;color:var(--primary);font-weight:900;font-size:13px}
.channel-card h3{font-size:20px;margin-bottom:8px}
.split-feature{display:grid;gap:28px;align-items:center;padding:30px;border-radius:32px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.split-feature.alt,.cold-wallet-split{background:linear-gradient(145deg,#f7fbff,#ffffff)}
.feature-media{border-radius:28px;background:linear-gradient(145deg,#eef6ff,#fff);padding:22px;min-height:280px;display:grid;place-items:center;border:1px solid var(--line)}
.feature-media img{max-height:330px;object-fit:contain}
.feature-list{display:grid;gap:10px;margin:20px 0}
.feature-list li,.check-list li{list-style:none;position:relative;padding-left:28px;color:#4b5565;margin-bottom:8px}
.feature-list li:before,.check-list li:before{content:'✓';position:absolute;left:0;top:0;color:var(--primary);font-weight:900}
.feature-list,.check-list{padding:0;margin-left:0}
.safety-panel{padding:24px;border-radius:28px;background:linear-gradient(135deg,#eef6ff,#fff);border:1px solid rgba(41,128,254,.16)}
.process-steps{display:grid;gap:14px;margin-top:22px}
.step-card{padding:22px;display:grid;gap:10px}
.step-num{width:38px;height:38px;border-radius:14px;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:900}
.risk-grid,.category-grid,.feature-grid{display:grid;gap:16px;margin-top:24px}
.risk-card{padding:22px;border-left:4px solid var(--primary)}
.risk-card b{display:block;color:var(--deep);margin-bottom:8px;font-size:18px}
.ecosystem-card,.feature-card,.info-card,.aside-card{padding:22px}
.ecosystem-card h3,.feature-card h3{margin-bottom:8px}
.ecosystem-category{background:var(--soft);border-radius:34px;padding:34px 0}
.faq-list{display:grid;gap:14px;margin-top:24px}
.faq-item{padding:22px}
.faq-item h3{font-size:19px;margin-bottom:8px}
.cta-section{padding:54px 0;background:linear-gradient(135deg,#eef6ff,#fff);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-card{text-align:center;max-width:780px;margin:0 auto;padding:36px;border-radius:32px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.page-hero{padding:54px 0 30px;background:linear-gradient(180deg,#f5faff,#fff);border-bottom:1px solid var(--line)}
.content-layout{display:grid;gap:26px;align-items:start}
.article-card{background:#fff;border:1px solid var(--line);border-radius:30px;padding:26px;box-shadow:var(--shadow)}
.article-card h2{font-size:28px;margin-top:14px}
.note-box{padding:18px;border-radius:22px;background:var(--soft-blue);border:1px solid rgba(41,128,254,.16);color:#4b5565;margin:20px 0}
.kv-list{display:grid;gap:12px;margin:22px 0}
.kv-list div{padding:16px;border:1px solid var(--line);border-radius:20px;background:#fff}
.kv-list strong{display:block;color:var(--deep);margin-bottom:4px}
.download-panel{margin-top:24px;padding:24px;border-radius:28px;background:linear-gradient(135deg,#f8fbff,#eef6ff);border:1px solid var(--line)}
.site-footer{background:#f4f7fb;border-top:1px solid var(--line);padding:44px 0 20px;margin-top:0}
.footer-grid{display:grid;gap:24px}
.site-footer p{font-size:14px;max-width:420px}
.site-footer h3{font-size:16px;margin-bottom:12px}
.site-footer a{display:block;color:#586475;margin-bottom:9px;font-size:14px}
.site-footer a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--line);margin-top:28px;padding-top:18px;color:#667085;font-size:13px;text-align:center}
@media (min-width:700px){
  .channel-nav{grid-template-columns:repeat(2,1fr)}
  .risk-grid,.category-grid,.feature-grid{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
}
@media (min-width:980px){
  .nav-toggle{display:none}
  .site-nav{position:static;display:flex;background:transparent;border:0;box-shadow:none;padding:0;gap:2px;align-items:center}
  .site-nav a{font-size:14px;padding:9px 11px}
  .portal-hero{padding:86px 0 42px}
  .hero-grid{grid-template-columns:1.02fr .98fr;gap:58px}
  .channel-nav{grid-template-columns:repeat(3,1fr)}
  .split-feature{grid-template-columns:1fr 1fr;padding:42px;gap:44px}
  .split-feature.reverse .feature-media{order:-1}
  .risk-grid{grid-template-columns:repeat(4,1fr)}
  .category-grid{grid-template-columns:repeat(4,1fr)}
  .feature-grid{grid-template-columns:repeat(3,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 320px}
  .article-card{padding:38px}
  .process-steps{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:420px){
  .container{width:min(100% - 28px,1120px)}
  .hero-visual{min-height:320px;padding:18px}
  .float-card{position:relative;inset:auto;margin:6px;display:inline-block}
  .hero-visual{display:block;text-align:center}
  .hero-visual img{margin:0 auto 10px;max-height:260px}
  .download-btn{width:100%;padding:0 18px}
  .site-nav.open{grid-template-columns:1fr}
}