:root {
  --primary: #2980FE;
  --primary-dark: #1268E8;
  --bg: #ffffff;
  --bg-soft: #f5f8fc;
  --bg-blue: #eef6ff;
  --text: #1f2937;
  --muted: #667085;
  --line: #e5eaf1;
  --panel: #ffffff;
  --shadow: 0 16px 45px rgba(41,128,254,.10);
  --radius: 24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#fff 0%,#f7faff 42%,#fff 100%);line-height:1.75;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 16px;color:var(--muted)}
h1,h2,h3{margin:0;line-height:1.22;color:#172033}
h1{font-size:clamp(2.18rem,7vw,4.9rem);letter-spacing:-.06em}
h2{font-size:clamp(1.75rem,4vw,3rem);letter-spacing:-.04em}
h3{font-size:1.18rem}
.container{width:min(1160px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border-bottom:1px solid rgba(229,234,241,.85)}
.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:#172033}
.logo,.footer-brand img{width:38px;height:38px;object-fit:contain;border-radius:12px}
.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:14px;width:44px;height:44px;color:var(--primary);font-size:1.25rem;display:inline-flex;align-items:center;justify-content:center}
.site-nav{position:absolute;top:72px;left:16px;right:16px;display:none;flex-direction:column;padding:14px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
.site-nav.open{display:flex}
.site-nav a{padding:11px 12px;border-radius:14px;color:#526071;font-weight:700;font-size:.95rem}
.site-nav a.active,.site-nav a:hover{color:var(--primary);background:var(--bg-blue)}
.portal-hero{position:relative;padding:56px 0 32px;overflow:hidden}
.portal-hero:before{content:"";position:absolute;inset:-120px -40px auto auto;width:420px;height:420px;background:radial-gradient(circle,rgba(41,128,254,.22),rgba(41,128,254,0) 66%);pointer-events:none}
.hero-grid{position:relative;display:grid;gap:34px;align-items:center}
.hero-copy{display:grid;gap:20px}
.eyebrow,.badge{width:fit-content;display:inline-flex;align-items:center;gap:8px;color:var(--primary);background:#eef6ff;border:1px solid rgba(41,128,254,.16);border-radius:999px;padding:8px 13px;font-weight:800;font-size:.88rem}
.hero-copy .lead{font-size:1.07rem;max-width:650px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:14px 24px;border-radius:999px;background:var(--primary);color:#fff;font-weight:800;box-shadow:0 14px 30px rgba(41,128,254,.26);transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark);box-shadow:0 18px 34px rgba(41,128,254,.31)}
.security-tags{display:flex;flex-wrap:wrap;gap:10px}
.security-tags span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#526071;font-weight:700;font-size:.9rem}
.hero-visual{position:relative;min-height:420px;display:grid;place-items:center}
.visual-shell{width:min(420px,92vw);border-radius:34px;padding:18px;background:linear-gradient(145deg,#fff,#eef6ff);border:1px solid rgba(41,128,254,.14);box-shadow:var(--shadow)}
.visual-shell img{width:100%;max-height:520px;object-fit:contain;margin:0 auto}
.status-card,.float-label{background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:0 12px 30px rgba(16,24,40,.08);border-radius:18px;padding:12px 14px;color:#445064}
.status-card{position:static;margin-top:14px;width:100%}
.status-card strong{display:block;color:#172033;font-size:1rem}
.status-card span,.float-label span{font-size:.86rem;color:var(--muted)}
.float-label{display:inline-flex;align-items:center;gap:9px;margin:8px 5px 0 0;font-weight:800}
.float-label i{width:9px;height:9px;border-radius:50%;background:var(--primary);display:inline-block}
.channel-nav,.ability-bar{padding:10px 0 40px}
.channel-grid,.ability-grid{display:grid;gap:14px}
.channel-card,.ability-item,.feature-card,.category-card,.risk-card,.info-card,.faq-item,.step-card,.page-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 36px rgba(16,24,40,.05)}
.channel-card{padding:18px;display:grid;gap:8px;min-height:148px}
.channel-card .tag,.risk-card .tag{width:fit-content;font-size:.78rem;color:var(--primary);background:var(--bg-blue);border-radius:999px;padding:4px 9px;font-weight:800}
.channel-card a,.inline-link,.card-link,.category-card a,.risk-card a,.side-panel a{color:var(--primary);font-weight:800}
.section{padding:48px 0}
.section-head{display:grid;gap:12px;margin-bottom:24px;max-width:760px}
.split-feature,.wallet-split,.cold-wallet-split,.swap-split,.dapp-split{display:grid;gap:28px;align-items:center;border-radius:30px;padding:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.cold-wallet-split,.gradient-panel{background:linear-gradient(135deg,#f6faff 0%,#eef6ff 100%)}
.feature-copy{display:grid;gap:16px}
.feature-list,.check-list{display:grid;gap:10px;padding:0;margin:0;list-style:none}
.feature-list li,.check-list li{position:relative;padding-left:28px;color:#445064}
.feature-list li:before,.check-list li:before{content:"";position:absolute;left:0;top:.65em;width:10px;height:10px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 5px rgba(41,128,254,.12)}
.feature-media{border-radius:26px;background:linear-gradient(145deg,#fff,#eef6ff);border:1px solid rgba(41,128,254,.12);padding:18px;min-height:260px;display:grid;place-items:center}
.feature-media img{max-height:420px;object-fit:contain}
.process-steps{display:grid;gap:14px}
.step-card{padding:18px;position:relative;overflow:hidden}
.step-card .number{display:inline-flex;width:38px;height:38px;align-items:center;justify-content:center;border-radius:14px;background:var(--primary);color:#fff;font-weight:900;margin-bottom:12px}
.risk-grid,.ecosystem-category,.category-grid,.info-grid,.faq-grid{display:grid;gap:16px}
.risk-card{padding:18px;border-top:4px solid var(--primary)}
.risk-card strong{color:#172033}
.category-card,.info-card,.page-card,.faq-item{padding:20px}
.ecosystem-category .category-card{min-height:172px}
.cta-section{padding:62px 0 72px}
.cta-box{text-align:center;border-radius:34px;padding:34px 22px;background:linear-gradient(135deg,#eef6ff,#fff 55%,#f7faff);border:1px solid rgba(41,128,254,.14);box-shadow:var(--shadow)}
.cta-box p{max-width:680px;margin-left:auto;margin-right:auto}
.page-hero{padding:48px 0 24px}
.page-hero-inner{display:grid;gap:16px;padding:24px;border-radius:30px;background:linear-gradient(135deg,#fff,#eef6ff);border:1px solid rgba(41,128,254,.13);box-shadow:var(--shadow)}
.content-layout{display:grid;gap:22px;padding:22px 0 56px}
.article-panel{display:grid;gap:18px}
.article-panel section,.side-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 12px 36px rgba(16,24,40,.05)}
.side-panel{align-self:start}
.side-panel ul,.article-panel ul,.article-panel ol{padding-left:20px;color:#445064;margin-top:8px}
.download-wrap{margin-top:6px}
.faq-item h3{margin-bottom:8px}
.download-steps{counter-reset:step;display:grid;gap:14px}
.download-steps .step-card{display:grid;gap:6px}
.site-footer{background:#f7faff;border-top:1px solid var(--line);padding:42px 0 24px}
.footer-grid{display:grid;gap:22px}
.footer-grid p{max-width:410px}
.footer-grid h3{font-size:1rem;margin-bottom:10px}
.footer-grid a{display:block;color:#526071;margin:7px 0}
.footer-grid a:hover{color:var(--primary)}
.footer-bottom{display:flex;flex-direction:column;gap:8px;margin-top:28px;padding-top:18px;border-top:1px solid var(--line);color:#667085;font-size:.9rem}
@media (min-width:600px){
  .channel-grid,.ability-grid,.risk-grid,.ecosystem-category,.category-grid,.info-grid,.faq-grid,.process-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .page-hero-inner{padding:34px}
}
@media (min-width:900px){
  .container{width:min(1180px,calc(100% - 56px))}
  .nav-toggle{display:none}
  .site-nav{position:static;display:flex;flex-direction:row;align-items:center;padding:0;border:0;box-shadow:none;background:transparent;gap:2px}
  .site-nav a{font-size:.91rem;padding:9px 10px}
  .portal-hero{padding:86px 0 42px}
  .hero-grid{grid-template-columns:1.02fr .98fr}
  .hero-copy{align-content:center}
  .hero-visual{min-height:560px}
  .visual-shell{width:min(430px,100%);transform:translateX(18px)}
  .status-card{position:absolute;left:0;top:84px;width:205px;margin:0}
  .float-label{position:absolute;margin:0}
  .float-label.cold{right:20px;top:88px}
  .float-label.swap{left:18px;bottom:110px}
  .float-label.dapp{right:6px;bottom:74px}
  .channel-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .wallet-split,.cold-wallet-split,.swap-split,.dapp-split,.split-feature{grid-template-columns:repeat(2,minmax(0,1fr));padding:34px}
  .cold-wallet-split .feature-copy,.dapp-split .feature-copy{order:2}
  .cold-wallet-split .feature-media,.dapp-split .feature-media{order:1}
  .risk-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .ecosystem-category{grid-template-columns:repeat(4,minmax(0,1fr))}
  .process-steps{grid-template-columns:repeat(3,minmax(0,1fr))}
  .content-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}
  .footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}
  .footer-bottom{flex-direction:row;justify-content:space-between}
}
@media (min-width:1100px){.site-nav a{padding:9px 12px}}
@media (max-width:380px){.container{width:min(100% - 22px,1160px)}.download-btn{width:100%}.security-tags span{width:100%;text-align:center}}