:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --ink: #1E293B;
  --muted: #64748B;
  --line: #E2E8F0;
  --bg: #F6F9FC;
  --soft: #F8FBFF;
  --white: #FFFFFF;
  --radius: 24px;
  --shadow: 0 18px 46px rgba(20, 43, 83, .08);
}
* { 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(--ink);
  background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 45%, #FFFFFF 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(100% - 32px, 1180px); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.02em; }
.brand-logo { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.brand-text { font-size: 18px; }
.site-nav { display: none; flex-direction: column; gap: 8px; position: absolute; left: 16px; right: 16px; top: 72px; padding: 14px; background: var(--white); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.site-nav.open { display: flex; }
.site-nav a { padding: 10px 12px; border-radius: 14px; color: var(--muted); font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: var(--primary-soft); }
.nav-toggle { border: 1px solid var(--line); background: var(--white); border-radius: 14px; width: 42px; height: 42px; font-size: 20px; color: var(--ink); }
main { display: block; }
.section { padding: 58px 0; }
.section.alt { background: linear-gradient(180deg, #F8FBFF 0%, #FFFFFF 100%); }
.section-head { margin-bottom: 24px; max-width: 780px; }
.eyebrow, .category-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; color: var(--primary); background: var(--primary-soft); border: 1px solid #D7E8FF; font-weight: 700; font-size: 13px; }
h1, h2, h3 { line-height: 1.22; margin: 0 0 14px; letter-spacing: -.03em; }
h1 { font-size: clamp(34px, 8vw, 68px); }
h2 { font-size: clamp(27px, 5vw, 44px); }
h3 { font-size: 21px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: clamp(17px, 3.8vw, 21px); color: #475569; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(41, 128, 254, .22);
  border: 1px solid rgba(41, 128, 254, .2);
  transition: transform .18s ease, box-shadow .18s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41, 128, 254, .28); }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 800; margin-top: 8px; }
.link-arrow::after { content: '→'; }
.web3-dashboard-hero { padding: 48px 0 34px; background: radial-gradient(circle at 92% 6%, rgba(41,128,254,.17), transparent 34%), linear-gradient(180deg, #FFFFFF 0%, #F3F8FF 100%); }
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero-copy { padding: 26px 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 24px 0; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span { padding: 8px 12px; background: var(--white); border: 1px solid var(--line); border-radius: 999px; color: #475569; font-weight: 700; font-size: 13px; }
.console-panel { position: relative; padding: 16px; border: 1px solid var(--line); border-radius: 30px; background: rgba(255,255,255,.78); box-shadow: var(--shadow); overflow: hidden; }
.console-panel::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 78% 12%, rgba(41,128,254,.17), transparent 30%); pointer-events: none; }
.phone-visual { position: relative; z-index: 1; padding: 14px; background: linear-gradient(145deg, #F9FCFF, #FFFFFF); border: 1px solid var(--line); border-radius: 26px; }
.status-stack { position: relative; z-index: 2; display: grid; gap: 10px; margin-top: 14px; }
.status-card { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 12px 14px; border: 1px solid var(--line); background: rgba(255,255,255,.92); border-radius: 18px; }
.status-card strong { font-size: 15px; }
.status-card span { color: var(--primary); font-weight: 800; font-size: 13px; }
.service-index { display: grid; gap: 14px; }
.service-card, .info-card, .risk-card, .faq-item, .step-card, .side-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .04);
}
.service-card { position: relative; overflow: hidden; }
.service-card::before { content: attr(data-label); display: inline-flex; color: var(--primary); background: var(--primary-soft); border-radius: 999px; padding: 4px 9px; font-size: 12px; font-weight: 800; margin-bottom: 12px; }
.feature-split, .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section { display: grid; gap: 24px; align-items: center; }
.feature-panel { background: var(--white); border: 1px solid var(--line); border-radius: 30px; padding: 24px; box-shadow: var(--shadow); }
.feature-panel.blue { background: linear-gradient(135deg, #FFFFFF 0%, #EFF7FF 100%); }
.feature-panel.gray { background: linear-gradient(135deg, #F8FBFF 0%, #FFFFFF 100%); }
.visual-card { border-radius: 30px; border: 1px solid var(--line); background: var(--white); padding: 18px; box-shadow: var(--shadow); }
.check-list, .clean-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; }
.check-list li, .clean-list li { position: relative; padding-left: 28px; color: #475569; }
.check-list li::before, .clean-list li::before { content: ''; position: absolute; left: 0; top: .62em; width: 9px; height: 9px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px var(--primary-soft); }
.privacy-boundary-section, .submit-chain-section, .developer-center-section { display: grid; gap: 20px; }
.boundary-grid, .category-grid, .risk-grid, .faq-grid, .related-grid { display: grid; gap: 16px; }
.boundary-item { padding: 18px; border-radius: 20px; background: var(--soft); border: 1px solid var(--line); }
.ecosystem-card { border-radius: 30px; padding: 26px; background: linear-gradient(135deg, #F4F9FF, #FFFFFF); border: 1px solid var(--line); }
.code-panel { background: #F8FBFF; border: 1px solid var(--line); border-radius: 24px; padding: 18px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #334155; overflow: hidden; }
.code-panel span { color: var(--primary); font-weight: 800; }
.process-steps { display: grid; gap: 14px; }
.step-card { display: grid; gap: 8px; }
.step-no { width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center; border-radius: 14px; background: var(--primary); color: var(--white); font-weight: 800; }
.risk-card { border-left: 5px solid var(--primary); }
.risk-card b { color: var(--ink); display: block; margin-bottom: 6px; }
.faq-item summary { cursor: pointer; font-weight: 800; color: var(--ink); }
.faq-item p { margin-top: 12px; }
.cta-section { text-align: center; border-radius: 34px; margin: 54px auto; padding: 44px 22px; background: radial-gradient(circle at 18% 10%, rgba(41,128,254,.16), transparent 28%), linear-gradient(135deg, #F3F8FF 0%, #FFFFFF 100%); border: 1px solid var(--line); }
.page-hero { padding: 48px 0 28px; background: radial-gradient(circle at 80% 0%, rgba(41,128,254,.14), transparent 32%), linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 100%); }
.page-grid { display: grid; gap: 24px; align-items: start; }
.content-card { background: var(--white); border: 1px solid var(--line); border-radius: 30px; padding: 24px; box-shadow: var(--shadow); }
.content-card .download-btn { margin-top: 18px; }
.note-box { border: 1px solid #D7E8FF; background: var(--primary-soft); border-radius: 22px; padding: 18px; color: #31567D; }
.notice-strip { display: grid; gap: 12px; border-radius: 26px; padding: 20px; background: #F8FBFF; border: 1px solid var(--line); }
.faq-list { display: grid; gap: 14px; }
.install-steps { counter-reset: step; list-style: none; padding: 0; margin: 18px 0; display: grid; gap: 12px; }
.install-steps li { counter-increment: step; background: var(--soft); border: 1px solid var(--line); border-radius: 18px; padding: 14px 14px 14px 54px; position: relative; }
.install-steps li::before { content: counter(step); position: absolute; left: 14px; top: 14px; width: 28px; height: 28px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; background: var(--primary); color: var(--white); font-weight: 800; }
.site-footer { background: #F8FAFC; border-top: 1px solid var(--line); padding: 40px 0 24px; }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { font-weight: 900; font-size: 20px; margin-bottom: 10px; }
.site-footer h3 { font-size: 16px; margin-bottom: 10px; }
.site-footer a { display: block; color: var(--muted); margin: 7px 0; }
.footer-bottom { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
@media (min-width: 680px) {
  .service-index, .category-grid, .risk-grid, .faq-grid, .related-grid, .boundary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; }
}
@media (min-width: 960px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; flex-direction: row; align-items: center; gap: 3px; padding: 0; border: 0; box-shadow: none; background: transparent; }
  .site-nav a { font-size: 14px; padding: 9px 10px; }
  .hero-grid, .feature-split, .digital-assets-hub, .web3-ecosystem-section, .hardware-wallet-section, .swap-service-section { grid-template-columns: 1.05fr .95fr; }
  .hardware-wallet-section.reverse, .web3-ecosystem-section.reverse { grid-template-columns: .92fr 1.08fr; }
  .service-index { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .service-index .service-card:nth-child(1), .service-index .service-card:nth-child(7) { grid-column: span 2; }
  .privacy-boundary-section, .submit-chain-section, .developer-center-section, .page-grid { grid-template-columns: 1.2fr .8fr; }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .section { padding: 76px 0; }
  .console-panel { padding: 22px; }
  .status-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1180px) {
  .site-nav a { padding: 9px 12px; }
}