:root{
  --primary:#2980FE;
  --primary-dark:#1568df;
  --primary-light:#eef6ff;
  --bg:#f6f8fc;
  --bg-soft:#f2f7ff;
  --white:#ffffff;
  --text:#1f2937;
  --muted:#64748b;
  --line:#e5eaf2;
  --deep:#111827;
  --shadow:0 18px 45px rgba(41,128,254,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--deep);font-size:18px}
.logo{width:38px;height:38px;border-radius:12px;object-fit:cover}
.nav-toggle{
  width:44px;height:44px;border:1px solid var(--line);border-radius:14px;background:var(--white);
  color:var(--primary);font-size:22px;display:flex;align-items:center;justify-content:center;
}
.main-nav{
  position:absolute;left:16px;right:16px;top:74px;
  display:none;flex-direction:column;gap:6px;
  background:var(--white);border:1px solid var(--line);border-radius:18px;
  padding:12px;box-shadow:var(--shadow);
}
.main-nav.open{display:flex}
.main-nav a{padding:10px 12px;border-radius:12px;color:var(--muted);font-size:14px}
.main-nav a:hover,.main-nav a.active{background:var(--primary-light);color:var(--primary)}
.section{padding:56px 0}
.section-soft{background:linear-gradient(180deg,#f4f8ff 0%,#ffffff 100%)}
.eyebrow,.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border-radius:999px;
  background:var(--primary-light);color:var(--primary);font-weight:700;font-size:13px;
}
h1,h2,h3{line-height:1.22;color:var(--deep);margin:0 0 14px}
h1{font-size:34px;letter-spacing:-.8px}
h2{font-size:26px}
h3{font-size:18px}
p{margin:0 0 16px;color:var(--muted)}
.product-hero{
  position:relative;overflow:hidden;
  padding:58px 0 44px;
  background:
    radial-gradient(circle at 80% 12%,rgba(41,128,254,.18),transparent 32%),
    linear-gradient(135deg,#ffffff 0%,#f3f8ff 62%,#edf5ff 100%);
}
.product-hero:before{
  content:"";position:absolute;inset:auto -80px -180px auto;width:360px;height:360px;
  border-radius:50%;background:rgba(41,128,254,.10);
}
.hero-grid{display:grid;gap:36px;align-items:center;position:relative;z-index:1}
.hero-copy p{font-size:16px}
.hero-tags,.mini-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero-tags span,.mini-tags span,.blue-tag{
  display:inline-flex;align-items:center;padding:8px 11px;border-radius:999px;
  background:#fff;color:#36506b;border:1px solid var(--line);font-size:13px;
}
.download-btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:13px 24px;border-radius:999px;
  background:var(--primary);color:#fff;font-weight:800;box-shadow:0 14px 26px rgba(41,128,254,.24);
  border:0;cursor:pointer;transition:.2s ease;white-space:nowrap;
}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark)}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:22px}
.app-visual{
  position:relative;padding:22px;border:1px solid rgba(41,128,254,.12);
  border-radius:30px;background:rgba(255,255,255,.82);box-shadow:var(--shadow);
}
.phone-shell{
  margin:auto;max-width:340px;border-radius:30px;padding:16px;
  background:linear-gradient(180deg,#ffffff,#edf5ff);border:1px solid var(--line);
}
.float-card{
  position:relative;margin-top:14px;border:1px solid var(--line);border-radius:18px;background:#fff;
  padding:14px;box-shadow:0 12px 28px rgba(15,23,42,.06);
}
.float-card strong{display:block;color:var(--deep)}
.float-card span{font-size:13px;color:var(--muted)}
.feature-shortcuts{display:grid;grid-template-columns:1fr;gap:14px}
.shortcut-card,.feature-card,.risk-card,.faq-item,.category-card,.step-card,.info-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 10px 30px rgba(15,23,42,.04);
}
.shortcut-card{padding:18px}
.shortcut-icon{
  width:38px;height:38px;border-radius:14px;background:var(--primary-light);
  color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px;
}
.shortcut-card a,.text-link{color:var(--primary);font-weight:800}
.product-section,.app-section,.cold-wallet-section,.swap-section,.dapp-section{
  display:grid;gap:28px;align-items:center;
}
.product-section{
  background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow);
}
.module-image{border-radius:26px;background:linear-gradient(180deg,#fff,#edf5ff);border:1px solid var(--line);padding:16px}
.module-list{display:grid;gap:10px;margin:16px 0}
.module-list li{list-style:none;position:relative;padding-left:24px;color:#475569}
.module-list li:before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;background:var(--primary)}
.process-steps{display:grid;gap:14px}
.step-card{padding:18px;position:relative}
.step-number{width:36px;height:36px;border-radius:12px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;margin-bottom:12px}
.risk-grid,.category-grid,.cards-grid{display:grid;gap:14px}
.risk-card{padding:18px;border-left:4px solid var(--primary)}
.risk-card small{display:block;color:var(--muted)}
.category-card{padding:18px}
.category-card:nth-child(1),.category-card:nth-child(6){background:linear-gradient(135deg,#fff,#eef6ff)}
.faq-list{display:grid;gap:12px}
.faq-item{padding:18px}
.faq-item h3{font-size:17px;margin-bottom:8px}
.cta-section{
  text-align:center;background:linear-gradient(135deg,#eef6ff,#ffffff);
  border:1px solid var(--line);border-radius:30px;padding:34px 20px;box-shadow:var(--shadow);
}
.page-hero{
  padding:52px 0 30px;background:linear-gradient(135deg,#fff,#eef6ff);
  border-bottom:1px solid var(--line);
}
.page-hero .container{display:grid;gap:16px}
.content-layout{display:grid;gap:24px;align-items:start}
.article-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:22px;box-shadow:var(--shadow)}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;position:sticky;top:96px}
.check-list{display:grid;gap:10px;margin:16px 0;padding:0}
.check-list li{list-style:none;background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:12px;color:#475569}
.notice-box{
  border:1px solid rgba(41,128,254,.22);background:var(--primary-light);border-radius:20px;padding:16px;margin:18px 0;color:#3b526c;
}
.download-center{text-align:center;margin-top:24px}
.download-steps{counter-reset:item;display:grid;gap:14px;padding:0;margin:20px 0}
.download-steps li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
.download-steps li:before{counter-increment:item;content:counter(item);display:inline-flex;width:30px;height:30px;border-radius:10px;background:var(--primary);color:#fff;align-items:center;justify-content:center;font-weight:800;margin-right:8px}
.site-footer{background:#101827;color:#d7e0ee;padding:42px 0 20px;margin-top:56px}
.site-footer p,.site-footer a{color:#aebbd0}
.footer-grid{display:grid;gap:24px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;margin-bottom:12px}
.footer-brand img{width:34px;height:34px;border-radius:10px}
.site-footer h3{color:#fff;font-size:16px}
.site-footer a{display:block;margin:8px 0;font-size:14px}
.copyright{border-top:1px solid rgba(255,255,255,.10);margin-top:22px;padding-top:16px;color:#8ea0ba;font-size:13px}
@media (min-width:640px){
  h1{font-size:42px}
  .feature-shortcuts{grid-template-columns:repeat(2,1fr)}
  .risk-grid,.category-grid,.cards-grid{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
  .nav-toggle{display:none}
  .main-nav{position:static;display:flex;flex-direction:row;align-items:center;padding:0;border:0;box-shadow:none;background:transparent;gap:4px}
  .main-nav a{padding:9px 10px}
  .hero-grid{grid-template-columns:1.02fr .98fr}
  .feature-shortcuts{grid-template-columns:repeat(3,1fr)}
  .product-section,.app-section,.cold-wallet-section,.swap-section,.dapp-section{grid-template-columns:1fr 1fr}
  .cold-wallet-section .module-image,.dapp-section .module-image{order:-1}
  .category-grid{grid-template-columns:repeat(4,1fr)}
  .risk-grid{grid-template-columns:repeat(3,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 300px}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
}
@media (min-width:1100px){
  h1{font-size:52px}
  .product-hero{padding:78px 0 58px}
  .feature-shortcuts{grid-template-columns:repeat(6,1fr)}
  .product-section{padding:34px}
}