:root {
  --primary: #2980FE;
  --primary-dark: #1769dc;
  --text: #1f2937;
  --muted: #64748b;
  --line: #e5eaf2;
  --soft: #f6f9fd;
  --soft-blue: #eef6ff;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(17, 39, 71, .08);
  --shadow-sm: 0 10px 24px rgba(17, 39, 71, .06);
  --radius: 24px;
  --radius-sm: 18px;
}
* { 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, #f7fbff 0%, #ffffff 36%, #f8fafc 100%);
  line-height: 1.72;
  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: 50;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226,232,240,.9);
}
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; color: #10233f; }
.logo img { width: 38px; height: 38px; object-fit: contain; border-radius: 10px; }
.nav-toggle { border: 1px solid var(--line); background: #fff; border-radius: 12px; width: 42px; height: 42px; color: var(--text); font-size: 20px; }
.site-nav {
  position: absolute;
  top: 70px;
  left: 16px;
  right: 16px;
  display: none;
  padding: 12px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}
.site-nav.is-open { display: grid; gap: 4px; }
.site-nav a { padding: 12px 14px; border-radius: 12px; color: #526173; font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: var(--soft-blue); }
main { min-height: 60vh; }
.section { padding: 56px 0; }
.section-head { max-width: 720px; margin: 0 auto 28px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.eyebrow, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  color: var(--primary);
  background: rgba(41,128,254,.09);
  border: 1px solid rgba(41,128,254,.18);
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 14px; color: #10233f; }
h1 { font-size: clamp(34px, 7vw, 64px); letter-spacing: -.04em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -.03em; }
h3 { font-size: 20px; }
p { margin: 0 0 16px; color: var(--muted); }
.lead { font-size: 18px; color: #48566a; }
.app-hero { padding: 52px 0 34px; position: relative; overflow: hidden; }
.app-hero:before {
  content: "";
  position: absolute;
  width: 540px;
  height: 540px;
  right: -220px;
  top: -160px;
  background: radial-gradient(circle, rgba(41,128,254,.22), rgba(41,128,254,0) 68%);
  pointer-events: none;
}
.hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-copy { position: relative; z-index: 2; }
.security-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.security-tags span, .mini-tag {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: #475569;
  font-size: 13px;
  box-shadow: 0 8px 20px rgba(15,23,42,.04);
}
.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 14px 28px rgba(41,128,254,.24);
  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 32px rgba(41,128,254,.28); }
.app-visual { position: relative; min-height: 440px; display: grid; place-items: center; }
.phone-shell {
  width: min(340px, 86vw);
  padding: 18px;
  border-radius: 38px;
  background: linear-gradient(180deg, #ffffff, #eef6ff);
  box-shadow: 0 30px 70px rgba(14,47,95,.16);
  border: 1px solid rgba(41,128,254,.14);
}
.phone-shell img { border-radius: 28px; width: 100%; object-fit: contain; }
.floating-card {
  position: static;
  margin-top: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 13px 14px;
  box-shadow: var(--shadow-sm);
  color: #334155;
  font-size: 14px;
}
.floating-card strong { display:block; color:#10233f; }
.float-dot { width: 10px; height: 10px; flex: 0 0 10px; margin-top: 7px; border-radius: 50%; background: var(--primary); box-shadow: 0 0 0 5px rgba(41,128,254,.12); }
.ability-bar { display: grid; gap: 12px; margin-top: 18px; }
.ability-item { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: 0 10px 26px rgba(15,23,42,.04); }
.ability-item h3 { font-size: 17px; padding-left: 14px; border-left: 3px solid var(--primary); }
.ability-item p { font-size: 14px; margin-bottom: 0; }
.feature-showcase { display: grid; gap: 18px; }
.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.feature-card .feature-image { margin: 18px 0 0; border-radius: 22px; background: var(--soft-blue); min-height: 180px; display: grid; place-items: center; overflow: hidden; }
.feature-card img { max-height: 250px; object-fit: contain; margin: 0 auto; }
.text-link { color: var(--primary); font-weight: 800; display: inline-flex; align-items: center; gap: 6px; }
.text-link:after { content: "→"; }
.product-panel {
  display: grid;
  gap: 24px;
  align-items: center;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.product-panel.alt, .cold-wallet-panel { background: linear-gradient(135deg, #f7fbff, #ffffff 48%, #eef6ff); }
.panel-image { background: var(--soft-blue); border-radius: 26px; padding: 18px; display: grid; place-items: center; min-height: 260px; }
.panel-image img { max-height: 360px; object-fit: contain; margin: 0 auto; }
.check-list, .step-list { display: grid; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
.check-list li, .step-list li { padding: 12px 14px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.72); color: #475569; }
.check-list li:before { content: "✓"; color: var(--primary); font-weight: 900; margin-right: 8px; }
.ecosystem-grid, .category-grid { display: grid; gap: 16px; }
.eco-card, .risk-card, .faq-item, .info-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 10px 24px rgba(15,23,42,.04);
}
.eco-card h3, .risk-card h3 { color: #10233f; }
.process-steps { display: grid; gap: 16px; counter-reset: step; }
.process-step {
  position: relative;
  padding: 20px 20px 20px 76px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 10px 24px rgba(15,23,42,.04);
}
.process-step:before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 20px;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
}
.risk-grid { display: grid; gap: 16px; }
.risk-card { border-top: 4px solid var(--primary); }
.risk-card .suggest { display: block; margin-top: 10px; color: #334155; font-weight: 700; }
.faq-list { display: grid; gap: 14px; }
.faq-item h3 { margin-bottom: 8px; font-size: 18px; }
.cta-section {
  margin: 36px auto 64px;
  text-align: center;
  padding: 42px 20px;
  border-radius: 30px;
  background: linear-gradient(135deg, #eef6ff, #ffffff 55%, #f6f9fd);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.page-hero { padding: 52px 0 22px; }
.page-hero-card {
  padding: 28px;
  border-radius: 30px;
  background: linear-gradient(135deg, #ffffff, #eef6ff);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.content-layout { display: grid; gap: 22px; align-items: start; padding: 26px 0 64px; }
.content-main { display: grid; gap: 18px; }
.content-main article, .article-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.sidebar { display: grid; gap: 16px; }
.side-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 10px 24px rgba(15,23,42,.04);
}
.side-card ul { margin: 0; padding-left: 18px; color: var(--muted); }
.notice-box { background: var(--soft-blue); border: 1px solid rgba(41,128,254,.18); border-radius: 20px; padding: 18px; color: #35506f; }
.download-panel { max-width: 840px; margin: 0 auto; text-align: center; }
.download-steps { display: grid; gap: 14px; margin: 26px 0; text-align: left; }
.download-step { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px; }
.about-grid { display: grid; gap: 18px; }
.site-footer { background: #fff; border-top: 1px solid var(--line); padding: 42px 0 24px; }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 900; color: #10233f; margin-bottom: 12px; }
.footer-brand img { width: 34px; height: 34px; border-radius: 9px; }
.site-footer h3 { font-size: 15px; }
.site-footer a { display: block; color: #64748b; margin: 8px 0; font-size: 14px; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); color: #94a3b8; font-size: 13px; }
@media (min-width: 640px) {
  .ability-bar { grid-template-columns: repeat(2, 1fr); }
  .feature-showcase, .ecosystem-grid, .category-grid, .risk-grid, .about-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; align-items: center; gap: 2px; padding: 0; border: 0; box-shadow: none; background: transparent; }
  .site-nav a { padding: 9px 11px; font-size: 14px; }
  .hero-grid { grid-template-columns: 1.02fr .98fr; gap: 54px; }
  .app-hero { padding: 86px 0 40px; }
  .app-visual { min-height: 560px; }
  .floating-card { position: absolute; margin: 0; width: 190px; }
  .floating-card.one { left: 0; top: 80px; }
  .floating-card.two { right: 8px; top: 64px; }
  .floating-card.three { left: 4px; bottom: 100px; }
  .floating-card.four { right: 0; bottom: 84px; }
  .ability-bar { grid-template-columns: repeat(5, 1fr); }
  .feature-showcase { grid-template-columns: repeat(2, 1fr); }
  .feature-card.large { min-height: 430px; }
  .product-panel { grid-template-columns: 1fr 1fr; padding: 36px; }
  .product-panel.reverse .panel-copy { order: 2; }
  .product-panel.reverse .panel-image { order: 1; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .risk-grid { grid-template-columns: repeat(3, 1fr); }
  .ecosystem-grid { grid-template-columns: repeat(4, 1fr); }
  .category-grid { grid-template-columns: repeat(4, 1fr); }
  .content-layout { grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; }
  .content-main article, .article-block { padding: 32px; }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; }
}
@media (min-width: 1180px) {
  .container { width: min(1180px, calc(100% - 48px)); }
  .site-nav a { padding: 10px 13px; }
}
@media (max-width: 420px) {
  .container { width: min(100% - 24px, 1120px); }
  .page-hero-card, .product-panel, .content-main article, .article-block { padding: 20px; border-radius: 22px; }
  .download-btn { width: 100%; }
  .security-tags span { flex: 1 1 100%; justify-content: center; }
}

.gradient-background { background: linear-gradient(135deg, #eef6ff 0%, #ffffff 48%, #f6f9fd 100%); }
.content-container { width: min(880px, calc(100% - 32px)); margin: 0 auto; }