:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --bg: #F6F9FC;
  --surface: #FFFFFF;
  --surface-alt: #F1F6FD;
  --text: #1F2937;
  --muted: #64748B;
  --line: #E5EAF1;
  --dark: #27364A;
  --shadow: 0 18px 55px rgba(31, 58, 92, 0.10);
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 38%, #FFFFFF 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0 0 16px; color: var(--muted); }
main { min-height: 64vh; }

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}
.content-container {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
}
.gradient-background {
  background:
    radial-gradient(circle at top left, rgba(41,128,254,0.13), transparent 34%),
    linear-gradient(135deg, #F8FBFF 0%, #EEF6FF 100%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229,234,241,0.9);
}
.nav-shell {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand, .logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.logo-img { width: 36px; height: 36px; object-fit: contain; }
.site-nav {
  position: absolute;
  top: 72px;
  left: 14px;
  right: 14px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: flex; }
.site-nav a {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 15px;
  border-radius: 14px;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--primary);
  background: var(--primary-soft);
}
.menu-toggle {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--dark);
  border-radius: 14px;
  width: 44px;
  height: 44px;
  font-size: 20px;
}

.launch-hero {
  padding: 54px 0 36px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}
.eyebrow, .category-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-size: 13px;
  font-weight: 750;
}
h1 {
  margin: 16px 0 14px;
  font-size: clamp(34px, 9vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.06em;
  color: #142238;
}
.section-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.04em;
  color: #172337;
}
.section-lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 17px;
}
.hero-copy .section-lead { font-size: 18px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 138px;
  padding: 13px 24px;
  margin-top: 12px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(41,128,254,0.25);
  transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41,128,254,0.28); }
.safe-tags, .hero-tags, .pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.safe-tags span, .hero-tags span, .pill-row span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
  border-radius: 999px;
  color: var(--dark);
  font-size: 13px;
}
.hero-visual, .app-showcase {
  position: relative;
  min-height: 360px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 70% 20%, rgba(41,128,254,0.18), transparent 30%),
    linear-gradient(160deg, #FFFFFF 0%, #EAF3FF 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  padding: 28px;
}
.hero-phone {
  width: min(76%, 360px);
  filter: drop-shadow(0 24px 42px rgba(27,56,91,0.16));
}
.float-label {
  position: absolute;
  background: rgba(255,255,255,0.92);
  color: var(--dark);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 12px;
  font-weight: 750;
  font-size: 13px;
  box-shadow: 0 12px 26px rgba(31,58,92,0.10);
}
.float-label.one { left: 18px; top: 30px; }
.float-label.two { right: 18px; top: 78px; }
.float-label.three { left: 26px; bottom: 42px; }
.float-label.four { right: 22px; bottom: 28px; }

.section { padding: 54px 0; }
.section-head {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.highlight-bar, .category-grid, .app-category-center, .risk-grid, .faq-grid, .info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.highlight-card, .category-card, .risk-card, .faq-item, .info-card, .mini-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 12px 32px rgba(31,58,92,0.06);
}
.highlight-card .tag, .category-card .tag {
  display: inline-flex;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 10px;
}
.highlight-card h3, .category-card h3, .risk-card h3, .faq-item h3, .info-card h3, .mini-card h3 {
  margin: 0 0 8px;
  color: var(--dark);
  font-size: 19px;
  line-height: 1.3;
}
.card-link {
  display: inline-flex;
  margin-top: 8px;
  color: var(--primary);
  font-weight: 800;
}

.launch-card, .big-feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.big-feature-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-bottom: 22px;
}
.feature-copy { padding: 28px; }
.feature-copy h2 { margin: 0 0 12px; font-size: clamp(25px, 6vw, 40px); line-height: 1.18; color: #142238; }
.feature-copy ul, .page-card ul, .check-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.feature-copy li, .page-card li, .check-list li {
  position: relative;
  padding-left: 24px;
  color: var(--muted);
}
.feature-copy li::before, .page-card li::before, .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--primary);
}
.feature-media {
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(145deg, #F6FAFF, #EDF5FF);
}
.feature-media img { max-height: 420px; object-fit: contain; filter: drop-shadow(0 18px 32px rgba(33,58,92,0.12)); }
.wallet-feature .feature-media { background: linear-gradient(160deg, #F8FBFF, #EAF3FF); }
.cold-wallet-feature { background: #F8FBFF; }
.cold-wallet-feature .feature-media { background: linear-gradient(160deg, #EEF6FF, #FFFFFF); }
.swap-feature .feature-media { background: linear-gradient(160deg, #FFFFFF, #EFF6FF); }
.dapp-feature .feature-media { background: linear-gradient(160deg, #EEF6FF, #FFFFFF); }

.process-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  counter-reset: step;
}
.step-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 12px 28px rgba(31,58,92,0.05);
}
.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  margin-bottom: 12px;
}
.step-card h3 { margin: 0 0 8px; color: var(--dark); }

.safety-panel {
  background: linear-gradient(135deg, #F7FBFF, #FFFFFF);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}
.risk-card {
  border-left: 4px solid var(--primary);
}
.risk-card strong {
  display: block;
  color: var(--primary);
  margin-bottom: 6px;
}

.cta-section {
  text-align: center;
  padding: 46px 22px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top, rgba(41,128,254,0.14), transparent 38%),
    linear-gradient(145deg, #F7FBFF, #FFFFFF);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.cta-section h2 { margin: 0 0 10px; font-size: clamp(28px, 6vw, 44px); letter-spacing: -0.04em; }

.page-hero {
  padding: 48px 0 24px;
  background:
    radial-gradient(circle at 18% 10%, rgba(41,128,254,0.13), transparent 30%),
    linear-gradient(180deg, #FFFFFF, #F7FAFF);
}
.page-hero p { font-size: 17px; max-width: 760px; }
.page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 28px 0 64px;
}
.page-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 12px 36px rgba(31,58,92,0.06);
}
.page-card h2 { margin: 0 0 12px; font-size: 26px; color: #142238; }
.side-panel {
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  height: fit-content;
}
.side-panel h2, .side-panel h3 { margin-top: 0; color: var(--dark); }
.notice-box {
  border: 1px solid #D8E8FF;
  background: #F1F7FF;
  border-radius: var(--radius-md);
  padding: 18px;
  color: var(--dark);
  margin: 18px 0;
}
.number-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.number-list li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  align-items: start;
  color: var(--muted);
}
.number-list b {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  color: #fff;
  background: var(--primary);
}
.faq-item details { border: 0; }
.faq-item summary { cursor: pointer; font-weight: 800; color: var(--dark); }
.faq-item p { margin-top: 12px; }

.site-footer {
  background: #F6F9FC;
  border-top: 1px solid var(--line);
  padding: 38px 0 22px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.footer-brand { font-size: 22px; color: var(--dark); font-weight: 900; margin-bottom: 8px; }
.site-footer h3 { margin: 0 0 10px; color: var(--dark); }
.site-footer a { display: block; color: var(--muted); padding: 4px 0; }
.site-footer a:hover { color: var(--primary); }
.footer-bottom {
  width: min(1120px, calc(100% - 32px));
  margin: 26px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (min-width: 640px) {
  .highlight-bar, .category-grid, .risk-grid, .info-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-grid { grid-template-columns: repeat(2, 1fr); }
  .app-category-center { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .menu-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2px;
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }
  .site-nav a { font-size: 14px; padding: 9px 10px; }
  .launch-hero { padding: 82px 0 48px; }
  .hero-grid { grid-template-columns: 0.96fr 1.04fr; gap: 44px; }
  .hero-visual { min-height: 560px; }
  .section { padding: 78px 0; }
  .section-head { flex-direction: row; justify-content: space-between; align-items: end; }
  .highlight-bar { grid-template-columns: repeat(3, 1fr); }
  .big-feature-card { grid-template-columns: 1fr 1fr; align-items: center; }
  .big-feature-card.reverse .feature-copy { order: 2; }
  .big-feature-card.reverse .feature-media { order: 1; }
  .feature-copy { padding: 46px; }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .risk-grid { grid-template-columns: repeat(3, 1fr); }
  .app-category-center { grid-template-columns: repeat(4, 1fr); }
  .page-layout { grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; padding-top: 42px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}

@media (min-width: 1100px) {
  .site-nav a { padding: 9px 12px; }
  .feature-media img { max-height: 480px; }
}