:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-light: #F4F8FF;
  --text: #1F2937;
  --muted: #667085;
  --soft: #F6F8FB;
  --line: #E5EAF2;
  --white: #FFFFFF;
  --dark: #2F3A4A;
  --shadow: 0 20px 50px rgba(41, 128, 254, 0.10);
  --shadow-card: 0 12px 28px rgba(31, 41, 55, 0.08);
  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-sm: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "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%; height: auto; display: block; }
main { min-height: 60vh; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 18px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--dark); letter-spacing: -0.02em; }
.logo img { width: 36px; height: 36px; object-fit: contain; border-radius: 10px; }
.nav-toggle { border: 1px solid var(--line); background: var(--white); color: var(--dark); border-radius: 12px; padding: 8px 12px; font-size: 20px; cursor: pointer; }
.site-nav {
  display: none;
  position: absolute;
  top: 68px;
  left: 16px;
  right: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-card);
  padding: 10px;
}
.site-nav.is-open { display: grid; }
.site-nav a { padding: 11px 12px; color: var(--muted); border-radius: 12px; font-size: 14px; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary); }

.container, .content-container {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}
.narrow-container { width: min(900px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 54px 0; }
.section-title { margin-bottom: 22px; }
.section-title .eyebrow, .eyebrow, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41,128,254,0.12);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 700;
}
h1, h2, h3 { line-height: 1.25; color: #172033; margin: 0 0 14px; }
h1 { font-size: clamp(34px, 8vw, 62px); letter-spacing: -0.05em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.035em; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; color: var(--muted); }
.lead { font-size: 17px; color: #52606F; }

.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, 0.22);
  transition: transform .2s ease, box-shadow .2s ease;
  border: 0;
  white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 36px rgba(41, 128, 254, 0.28); }
.text-link { color: var(--primary); font-weight: 800; }

.gradient-background, .app-hero {
  position: relative;
  background:
    radial-gradient(circle at 15% 18%, rgba(41,128,254,.13), transparent 28%),
    radial-gradient(circle at 88% 26%, rgba(41,128,254,.10), transparent 28%),
    linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%);
  overflow: hidden;
}
.app-hero { padding: 54px 0 34px; }
.app-hero-grid { display: grid; gap: 34px; align-items: center; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy .download-btn { margin: 14px 0 18px; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.security-tags span { background: var(--white); border: 1px solid var(--line); color: var(--dark); padding: 8px 11px; border-radius: 999px; font-size: 13px; box-shadow: 0 8px 18px rgba(31,41,55,.04); }
.app-visual { position: relative; min-height: 420px; display: grid; place-items: center; }
.app-phone-shell {
  width: min(330px, 84vw);
  border-radius: 34px;
  background: linear-gradient(180deg, #F8FBFF, #FFFFFF);
  padding: 12px;
  border: 1px solid rgba(41,128,254,.12);
  box-shadow: var(--shadow);
}
.app-phone-shell img { border-radius: 28px; width: 100%; object-fit: contain; }
.floating-card {
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  border-radius: 18px;
  padding: 12px 14px;
  color: var(--dark);
  width: 100%;
}
.floating-card strong { display: block; font-size: 14px; color: #172033; }
.floating-card span { color: var(--muted); font-size: 13px; }
.float-stack { display: grid; gap: 10px; width: min(420px, 100%); margin-top: 14px; }

.ability-bar {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}
.ability-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 10px 24px rgba(31,41,55,.045);
}
.ability-item b { display: block; color: var(--primary); margin-bottom: 4px; }
.ability-item span { color: var(--muted); font-size: 14px; }

.feature-showcase, .category-grid, .ecosystem-grid, .risk-grid, .faq-grid {
  display: grid;
  gap: 18px;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 18px;
  overflow: hidden;
}
.feature-card img { border-radius: 22px; background: var(--primary-light); border: 1px solid var(--line); }
.feature-card .card-link { color: var(--primary); font-weight: 800; }
.feature-card.large { min-height: 360px; }

.product-section, .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  padding: 24px;
  display: grid;
  gap: 24px;
  align-items: center;
  box-shadow: var(--shadow-card);
}
.wallet-panel, .swap-panel { background: var(--white); }
.cold-wallet-panel { background: linear-gradient(135deg, #F6FAFF 0%, #FFFFFF 100%); }
.dapp-panel { background: linear-gradient(135deg, #FFFFFF 0%, #F4F8FF 100%); }
.panel-image { border-radius: var(--radius-md); border: 1px solid var(--line); background: var(--primary-light); padding: 12px; }
.panel-image img { border-radius: 18px; margin: auto; }
.check-list, .clean-list { display: grid; gap: 10px; margin: 18px 0; padding: 0; list-style: none; }
.check-list li, .clean-list li { position: relative; padding-left: 28px; color: var(--muted); }
.check-list li::before, .clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 5px var(--primary-soft);
}
.info-strip { display: grid; gap: 12px; margin-top: 16px; }
.info-pill { border: 1px solid var(--line); background: var(--white); border-radius: 16px; padding: 14px; }

.process-steps { display: grid; gap: 14px; }
.step-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  position: relative;
  box-shadow: 0 10px 22px rgba(31,41,55,.045);
}
.step-no { width: 34px; height: 34px; display: inline-grid; place-items: center; border-radius: 12px; background: var(--primary); color: var(--white); font-weight: 800; margin-bottom: 12px; }
.step-card a { color: var(--primary); font-weight: 800; }

.risk-card, .category-card, .faq-item, .safety-panel, .guide-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 10px 22px rgba(31,41,55,.045);
}
.risk-card { border-top: 4px solid var(--primary); }
.risk-card .suggestion { background: var(--primary-light); border-radius: 14px; padding: 10px 12px; color: var(--dark); margin-top: 10px; font-size: 14px; }
.category-card strong { display: block; color: #172033; font-size: 18px; margin-bottom: 8px; }
.category-card a, .risk-card a, .guide-card a { color: var(--primary); font-weight: 800; }
.faq-item h3 { font-size: 18px; }

.cta-section {
  text-align: center;
  background: linear-gradient(135deg, #EEF6FF 0%, #FFFFFF 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 20px;
  box-shadow: var(--shadow-card);
}
.cta-section p { max-width: 680px; margin: 0 auto 18px; }

.page-hero { padding: 48px 0 28px; background: linear-gradient(180deg, #FFFFFF, #F6FAFF); }
.page-hero .narrow-container { display: grid; gap: 12px; }
.page-layout { display: grid; gap: 22px; align-items: start; }
.article-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.article-card h2 { font-size: 26px; margin-top: 26px; }
.article-card h2:first-child { margin-top: 0; }
.side-panel { display: grid; gap: 14px; }
.download-block { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.timeline-list { counter-reset: step; display: grid; gap: 14px; margin: 18px 0; }
.timeline-list .guide-card { position: relative; padding-left: 68px; }
.timeline-list .guide-card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--white);
  display: grid;
  place-items: center;
  font-weight: 800;
}
.warning-box { background: var(--primary-light); border: 1px solid rgba(41,128,254,.16); border-radius: 20px; padding: 18px; color: var(--dark); }
.download-steps { display: grid; gap: 14px; margin-top: 20px; }
.download-steps .step-card { box-shadow: none; }

.site-footer { background: #F6F8FB; border-top: 1px solid var(--line); margin-top: 60px; }
.footer-inner { width: min(1160px, calc(100% - 32px)); margin: 0 auto; padding: 38px 0; display: grid; gap: 28px; }
.footer-logo { font-weight: 900; color: #172033; font-size: 20px; margin-bottom: 10px; }
.footer-links { display: grid; gap: 22px; }
.footer-links div { display: grid; gap: 8px; }
.footer-links strong { color: #172033; }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-bottom { border-top: 1px solid var(--line); text-align: center; color: var(--muted); padding: 18px; font-size: 13px; }

@media (min-width: 640px) {
  .ability-bar { grid-template-columns: repeat(2, 1fr); }
  .feature-showcase, .category-grid, .ecosystem-grid, .risk-grid, .faq-grid { grid-template-columns: repeat(2, 1fr); }
  .info-strip { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 920px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; align-items: center; gap: 4px; padding: 0; border: 0; box-shadow: none; background: transparent; }
  .site-nav a { padding: 8px 10px; }
  .app-hero { padding: 76px 0 42px; }
  .app-hero-grid { grid-template-columns: 1.02fr .98fr; gap: 52px; }
  .float-stack { position: absolute; inset: auto 0 28px auto; width: 230px; }
  .float-stack .floating-card:nth-child(1) { transform: translate(-248px, -222px); }
  .float-stack .floating-card:nth-child(2) { transform: translate(6px, -212px); }
  .float-stack .floating-card:nth-child(3) { transform: translate(-266px, -28px); }
  .float-stack .floating-card:nth-child(4) { transform: translate(4px, -42px); }
  .floating-card { width: 230px; }
  .ability-bar { grid-template-columns: repeat(5, 1fr); }
  .feature-showcase { grid-template-columns: repeat(2, 1fr); }
  .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel { grid-template-columns: 1fr 1fr; padding: 34px; }
  .cold-wallet-panel .panel-image, .dapp-panel .panel-image { order: -1; }
  .ecosystem-grid, .category-grid { grid-template-columns: repeat(4, 1fr); }
  .risk-grid { grid-template-columns: repeat(3, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .page-layout { grid-template-columns: minmax(0, 1fr) 310px; }
  .article-card { padding: 34px; }
  .footer-inner { grid-template-columns: 1.1fr 1.6fr; }
  .footer-links { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1180px) {
  .site-nav a { padding: 8px 12px; }
}