:root{
  --primary:#2980FE;
  --primary-dark:#1268de;
  --primary-soft:#eef6ff;
  --bg:#f6f9fc;
  --bg-2:#f1f6fb;
  --white:#ffffff;
  --text:#1f2937;
  --muted:#657084;
  --line:#dfe7f1;
  --deep:#0f172a;
  --shadow:0 18px 46px rgba(28,70,122,.10);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Microsoft JhengHei",Arial,sans-serif;background:var(--bg);color:var(--text);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% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(223,231,241,.9)}
.header-inner{width:min(1180px,calc(100% - 28px));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--deep);letter-spacing:.2px}
.logo img,.footer-logo img{width:36px;height:36px;object-fit:contain;border-radius:10px}
.main-nav{position:absolute;left:14px;right:14px;top:72px;display:none;grid-template-columns:1fr;gap:8px;padding:14px;background:var(--white);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.main-nav.is-open{display:grid}
.main-nav a{padding:10px 12px;border-radius:13px;color:#3b4658;font-size:15px}
.main-nav a.active,.main-nav a:hover{background:var(--primary-soft);color:var(--primary)}
.nav-toggle{width:44px;height:44px;border:1px solid var(--line);border-radius:14px;background:var(--white);display:flex;flex-direction:column;justify-content:center;gap:5px;padding:0 11px}
.nav-toggle span{height:2px;border-radius:99px;background:var(--deep)}
.product-hero,.page-hero{position:relative;padding:54px 0 32px;background:linear-gradient(135deg,#ffffff 0%,#f4f9ff 55%,#eef6ff 100%);overflow:hidden}
.product-hero:before{content:"";position:absolute;width:420px;height:420px;right:-160px;top:-140px;background:radial-gradient(circle,rgba(41,128,254,.18),rgba(41,128,254,0) 68%)}
.hero-grid{position:relative;display:grid;gap:28px;align-items:center}
.eyebrow,.category-badge{display:inline-flex;align-items:center;gap:8px;width:max-content;padding:7px 12px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:13px;font-weight:700;border:1px solid rgba(41,128,254,.18)}
h1{margin:14px 0 14px;font-size:clamp(34px,7vw,60px);line-height:1.12;color:var(--deep);letter-spacing:-1px}
h2{margin:0 0 14px;font-size:clamp(25px,4vw,38px);line-height:1.2;color:var(--deep)}
h3{margin:0 0 8px;color:var(--deep);line-height:1.3}
p{margin:0 0 14px;color:var(--muted)}
.hero-copy .lead,.page-hero .lead{font-size:18px;color:#435167;max-width:680px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;background:var(--primary);color:#fff;border-radius:999px;font-weight:800;box-shadow:0 12px 26px rgba(41,128,254,.25);border:1px solid rgba(41,128,254,.2);transition:.2s ease}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:24px 0 18px}
.safe-tags,.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.safe-tags span,.tag-row span{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#475569;font-size:13px;font-weight:700}
.app-visual{position:relative;background:rgba(255,255,255,.72);border:1px solid rgba(223,231,241,.85);border-radius:30px;padding:18px;box-shadow:var(--shadow);min-height:360px;display:flex;align-items:center;justify-content:center}
.app-visual img{max-height:480px;object-fit:contain;margin:auto}
.float-card{position:relative;margin-top:12px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:13px 14px;box-shadow:0 12px 28px rgba(15,23,42,.08)}
.float-card strong{display:block;color:var(--deep)}
.float-card span{font-size:13px;color:var(--muted)}
.status-stack{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px;width:100%}
section{padding:48px 0}
.section-head{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.section-head.center{text-align:center;align-items:center}
.section-kicker{color:var(--primary);font-weight:800;font-size:14px;letter-spacing:.4px}
.feature-shortcuts,.category-grid,.risk-grid,.faq-grid,.service-grid{display:grid;gap:14px}
.feature-card,.category-card,.risk-card,.faq-item,.info-card,.step-card,.tip-card{background:var(--white);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 28px rgba(28,70,122,.06)}
.feature-card .icon-tag,.category-card .icon-tag{width:38px;height:38px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px}
.feature-card a,.category-card a,.section-link,.text-link{color:var(--primary);font-weight:800;display:inline-flex;align-items:center;gap:6px;margin-top:8px}
.product-section{padding:56px 0}
.product-panel{display:grid;gap:24px;background:var(--white);border:1px solid var(--line);border-radius:30px;padding:22px;box-shadow:var(--shadow);align-items:center}
.product-panel.alt{background:linear-gradient(135deg,#f8fbff,#eef6ff)}
.product-media{border-radius:26px;background:linear-gradient(145deg,#f4f8fd,#ffffff);border:1px solid var(--line);padding:20px;display:flex;align-items:center;justify-content:center;min-height:260px;overflow:hidden}
.product-media img{max-height:390px;object-fit:contain}
.check-list{display:grid;gap:9px;margin:18px 0;padding:0;list-style:none}
.check-list li{position:relative;padding-left:28px;color:#4b5563}
.check-list li:before{content:"";position:absolute;left:0;top:.45em;width:16px;height:16px;border-radius:50%;background:var(--primary-soft);border:4px solid #fff;box-shadow:0 0 0 1px rgba(41,128,254,.28)}
.cold-wallet-section{background:var(--bg-2)}
.swap-section{background:#fff}
.dapp-section{background:linear-gradient(180deg,#f8fbff,#fff)}
.safety-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:22px;box-shadow:var(--shadow)}
.safety-panel.blue{background:linear-gradient(135deg,#ffffff,#eff6ff)}
.process-steps{display:grid;gap:14px;counter-reset:step}
.step-card{position:relative;padding-top:24px}
.step-no{width:40px;height:40px;border-radius:15px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px;box-shadow:0 10px 20px rgba(41,128,254,.18)}
.risk-card{border-left:4px solid var(--primary)}
.risk-card b{display:block;color:var(--deep);font-size:17px;margin-bottom:6px}
.risk-card em{display:block;margin-top:8px;color:#334155;font-style:normal;font-weight:700}
.category-card{min-height:188px}
.faq-item summary{cursor:pointer;font-weight:800;color:var(--deep);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item p{margin-top:12px}
.cta-section{background:linear-gradient(135deg,#eff6ff,#ffffff);padding:56px 0}
.cta-card{text-align:center;background:#fff;border:1px solid var(--line);border-radius:30px;padding:30px 20px;box-shadow:var(--shadow)}
.site-footer{background:#111827;color:#d1d5db;padding:46px 0 0}
.footer-grid{display:grid;gap:26px}
.footer-grid h3{color:#fff;font-size:16px}
.footer-grid a{display:block;color:#d1d5db;margin:8px 0;font-size:14px}
.footer-grid p{color:#b9c1cf}
.footer-logo span{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding:18px 16px;text-align:center;color:#9ca3af;font-size:13px}
.page-hero{padding:46px 0 28px}
.page-wrap{display:grid;gap:22px;align-items:start;padding:42px 0 56px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.article-card h2{font-size:26px;margin-top:22px}
.article-card h2:first-child{margin-top:0}
.side-panel{display:grid;gap:14px}
.note-box{background:var(--primary-soft);border:1px solid rgba(41,128,254,.18);border-radius:22px;padding:18px;color:#344054}
.list-grid{display:grid;gap:12px;margin-top:16px}
.mini-item{padding:16px;border:1px solid var(--line);border-radius:18px;background:#fbfdff}
.download-single{margin-top:24px;padding-top:18px;border-top:1px solid var(--line)}
.two-col{display:grid;gap:16px}
.hero-mini-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
.metric{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px}
.metric strong{display:block;color:var(--deep);font-size:18px}
.metric span{color:var(--muted);font-size:13px}
@media (min-width:640px){
  .feature-shortcuts{grid-template-columns:repeat(2,1fr)}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .risk-grid{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:repeat(2,1fr)}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
  .nav-toggle{display:none}
  .main-nav{position:static;display:flex;align-items:center;gap:4px;padding:0;background:transparent;border:0;border-radius:0;box-shadow:none}
  .main-nav a{font-size:14px;padding:9px 10px}
  .hero-grid{grid-template-columns:1.02fr .98fr;gap:48px}
  .product-hero{padding:76px 0 54px}
  .float-card{position:absolute;margin:0}
  .float-card.one{left:-14px;bottom:52px;width:176px}
  .float-card.two{right:-10px;top:44px;width:174px}
  .float-card.three{right:20px;bottom:26px;width:190px}
  .status-stack{position:absolute;left:24px;top:24px;width:210px;grid-template-columns:1fr}
  .product-panel{grid-template-columns:1fr 1fr;padding:34px;gap:34px}
  .product-panel.reverse .product-media{order:2}
  .feature-shortcuts{grid-template-columns:repeat(3,1fr)}
  .category-grid{grid-template-columns:repeat(4,1fr)}
  .risk-grid{grid-template-columns:repeat(3,1fr)}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.4fr .8fr .8fr .8fr}
  .page-wrap{grid-template-columns:minmax(0,1fr) 310px}
  .article-card{padding:34px}
}
@media (min-width:1120px){
  .feature-shortcuts{grid-template-columns:repeat(6,1fr)}
  .main-nav a{padding:9px 12px}
}
@media (max-width:430px){
  .container{width:min(100% - 24px,1120px)}
  .product-hero{padding-top:38px}
  h1{font-size:33px}
  .product-panel,.article-card,.safety-panel{border-radius:22px;padding:18px}
  .status-stack,.hero-mini-metrics{grid-template-columns:1fr}
  .download-btn{width:100%}
}