:root{
  --primary:#2980FE;
  --primary-dark:#1267dc;
  --primary-soft:#eaf3ff;
  --bg:#f6f9fd;
  --bg-soft:#f8fbff;
  --text:#1f2937;
  --muted:#667085;
  --line:#e5eaf2;
  --white:#ffffff;
  --shadow:0 18px 50px 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;
  color:var(--text);
  background:linear-gradient(180deg,#fff 0%,#f7fbff 35%,#f6f9fd 100%);
  line-height:1.72;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.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(229,234,242,.9);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:18px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#111827;letter-spacing:-.02em}
.logo img{width:38px;height:38px;object-fit:contain;border-radius:12px}
.site-nav{display:none;align-items:center;gap:8px}
.site-nav a{font-size:14px;color:#475467;padding:9px 12px;border-radius:999px}
.site-nav a:hover,.site-nav a.active{background:var(--primary-soft);color:var(--primary)}
.nav-toggle{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;background:#fff;display:grid;place-content:center;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:#344054;border-radius:8px}
.site-nav.open{
  display:grid;position:absolute;left:16px;right:16px;top:74px;padding:14px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);border-radius:18px;grid-template-columns:1fr 1fr;gap:8px
}
.section{padding:56px 0}
.section.soft{background:var(--bg-soft)}
.section-head{max-width:760px;margin:0 auto 28px;text-align:center}
.section-kicker,.badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:var(--primary-soft);
  color:var(--primary);font-size:13px;font-weight:700
}
h1,h2,h3{line-height:1.18;margin:0 0 14px;color:#111827;letter-spacing:-.04em}
h1{font-size:clamp(34px,8vw,64px)}
h2{font-size:clamp(26px,5vw,42px)}
h3{font-size:20px}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:18px;color:#445164}
.download-btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;
  background:var(--primary);color:#fff;font-weight:800;box-shadow:0 12px 30px rgba(41,128,254,.28);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease
}
.download-btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 18px 38px rgba(41,128,254,.32)}
.text-link{display:inline-flex;align-items:center;color:var(--primary);font-weight:800;margin-top:6px}
.product-hero{position:relative;padding:48px 0 60px;overflow:hidden}
.product-hero:before{
  content:"";position:absolute;right:-180px;top:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(41,128,254,.20),rgba(41,128,254,0) 65%);pointer-events:none
}
.hero-grid{display:grid;gap:34px;align-items:center}
.hero-tags,.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 24px}
.hero-tags span,.tag-row span{
  padding:7px 12px;border:1px solid rgba(41,128,254,.18);background:#fff;border-radius:999px;color:#475467;font-size:13px
}
.app-visual{
  position:relative;min-height:420px;display:grid;place-items:center;padding:22px;
  background:linear-gradient(145deg,#eef6ff,#fff 55%,#f4f8ff);border:1px solid var(--line);border-radius:32px;box-shadow:var(--shadow)
}
.phone-frame{
  width:min(260px,78vw);border-radius:34px;padding:12px;background:#fff;border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(31,41,55,.12)
}
.float-card{
  position:absolute;background:rgba(255,255,255,.94);border:1px solid var(--line);box-shadow:0 16px 40px rgba(41,128,254,.12);
  border-radius:18px;padding:12px 14px;min-width:150px
}
.float-card strong{display:block;color:#111827}
.float-card span{font-size:12px;color:var(--muted)}
.float-one{left:12px;top:24px}
.float-two{right:12px;top:88px}
.float-three{left:18px;bottom:42px}
.float-four{right:18px;bottom:28px}
.feature-shortcuts{display:grid;grid-template-columns:1fr;gap:14px;margin-top:24px}
.feature-card,.shortcut-card,.risk-card,.faq-item,.info-card,.step-card,.category-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 34px rgba(31,41,55,.05)
}
.shortcut-card{padding:20px}
.shortcut-card .icon,.feature-card .icon{
  width:38px;height:38px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:900;margin-bottom:12px
}
.product-section,.cold-wallet-section,.swap-section,.dapp-section{
  display:grid;gap:28px;align-items:center;padding:30px;border:1px solid var(--line);border-radius:30px;background:#fff;box-shadow:var(--shadow)
}
.cold-wallet-section{background:linear-gradient(135deg,#f4f9ff 0%,#fff 60%)}
.product-image{border-radius:28px;background:#f4f8ff;border:1px solid var(--line);padding:18px}
.point-list{display:grid;gap:10px;margin:18px 0}
.point-list div{display:flex;gap:10px;align-items:flex-start;color:#475467}
.point-list div:before{content:"";width:8px;height:8px;flex:0 0 8px;margin-top:10px;background:var(--primary);border-radius:50%}
.process-steps{display:grid;gap:14px;counter-reset:step}
.step-card{padding:20px;position:relative;overflow:hidden}
.step-card:before{
  counter-increment:step;content:"0" counter(step);display:inline-grid;place-items:center;width:42px;height:42px;border-radius:15px;
  background:var(--primary);color:#fff;font-weight:900;margin-bottom:14px
}
.risk-grid{display:grid;gap:14px}
.risk-card{padding:20px;border-left:4px solid var(--primary)}
.risk-card small{display:block;color:var(--primary);font-weight:800;margin-top:8px}
.category-grid{display:grid;grid-template-columns:1fr;gap:14px}
.category-card{padding:22px;min-height:180px}
.category-card:nth-child(1),.category-card:nth-child(6){background:linear-gradient(145deg,#fff,#eef6ff)}
.faq-list{display:grid;gap:12px;max-width:920px;margin:0 auto}
.faq-item{padding:20px}
.faq-item h3{font-size:18px;margin-bottom:8px}
.cta-section{
  margin:20px auto 60px;padding:38px 24px;border-radius:32px;text-align:center;
  background:linear-gradient(135deg,#eaf3ff 0%,#fff 58%,#f5f9ff 100%);border:1px solid var(--line);box-shadow:var(--shadow)
}
.page-hero{padding:46px 0 30px}
.page-hero .container{
  padding:34px;border-radius:30px;background:linear-gradient(135deg,#fff 0%,#eef6ff 100%);border:1px solid var(--line);box-shadow:var(--shadow)
}
.content-layout{display:grid;gap:24px;align-items:start}
.article-card{background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow)}
.article-card p{font-size:16px}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;position:sticky;top:92px}
.side-panel a{display:block;padding:10px 0;color:var(--primary);font-weight:700;border-bottom:1px solid var(--line)}
.side-panel a:last-child{border-bottom:0}
.checklist,.number-list{display:grid;gap:12px;margin:18px 0}
.checklist li,.number-list li{padding:14px 16px;background:#f8fbff;border:1px solid var(--line);border-radius:16px;color:#475467}
.two-grid{display:grid;gap:14px}
.notice{
  padding:18px 20px;border-radius:20px;background:#f3f8ff;border:1px solid rgba(41,128,254,.18);color:#344054;margin:20px 0
}
.download-block{margin-top:24px;padding-top:22px;border-top:1px solid var(--line)}
.site-footer{background:#111827;color:#d0d5dd;padding:46px 0 24px;margin-top:20px}
.site-footer p,.site-footer a,.footer-bottom span{color:#aab3c1}
.footer-grid{display:grid;gap:26px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#fff}
.footer-brand img{width:38px;height:38px;border-radius:12px}
.site-footer h3{font-size:16px;color:#fff;margin-bottom:12px}
.site-footer a{display:block;margin:8px 0}
.footer-bottom{display:flex;flex-direction:column;gap:8px;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;margin-top:28px;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)}
  .two-grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
  .nav-toggle{display:none}
  .site-nav{display:flex}
  .hero-grid{grid-template-columns:1.02fr .98fr}
  .feature-shortcuts{grid-template-columns:repeat(3,1fr)}
  .product-section,.cold-wallet-section,.swap-section,.dapp-section{grid-template-columns:1fr 1fr;padding:42px}
  .cold-wallet-section .product-image,.dapp-section .product-image{order:1}
  .cold-wallet-section .section-copy,.dapp-section .section-copy{order:2}
  .process-steps{grid-template-columns:repeat(3,1fr)}
  .risk-grid{grid-template-columns:repeat(3,1fr)}
  .category-grid{grid-template-columns:repeat(4,1fr)}
  .content-layout{grid-template-columns:minmax(0,1fr) 300px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
  .footer-bottom{flex-direction:row;justify-content:space-between}
  .section{padding:78px 0}
}
@media (min-width:1120px){
  .feature-shortcuts{grid-template-columns:repeat(6,1fr)}
}
@media (max-width:420px){
  .container{width:min(100% - 24px,1120px)}
  .page-hero .container,.article-card{padding:22px}
  .product-section,.cold-wallet-section,.swap-section,.dapp-section{padding:22px;border-radius:24px}
  .feature-shortcuts{grid-template-columns:1fr}
  .float-card{position:static;margin:8px;width:100%;min-width:0}
  .app-visual{display:block;min-height:auto}
  .phone-frame{margin:0 auto 10px}
  .download-btn{width:100%}
}