:root {
  --primary: #2980FE;
  --primary-dark: #1264d8;
  --ink: #172033;
  --text: #39445a;
  --muted: #667085;
  --light: #f6f9ff;
  --soft: #eef5ff;
  --line: #dde6f3;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(35, 81, 140, 0.10);
  --radius-lg: 32px;
  --radius-md: 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", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 36%, #ffffff 100%);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(100% - 36px, 1160px); margin: 0 auto; }
.narrow-container { width: min(100% - 36px, 880px); margin: 0 auto; }
.section { padding: 72px 0; }
.section-tight { padding: 48px 0; }
.badge, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 6px 13px;
  border-radius: 999px;
  color: var(--primary);
  background: rgba(41, 128, 254, 0.10);
  border: 1px solid rgba(41, 128, 254, 0.18);
  font-size: 0.88rem;
  font-weight: 700;
}
.eyebrow { color: var(--primary); font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); line-height: 1.22; margin: 0 0 16px; }
h1 { font-size: clamp(2.1rem, 7vw, 4.6rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.75rem, 4.5vw, 3rem); letter-spacing: -0.03em; }
h3 { font-size: 1.22rem; }
p { margin: 0 0 18px; }
.lead { font-size: 1.08rem; color: #4d5a70; }
.muted { color: var(--muted); }
.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(221, 230, 243, 0.85);
}
.header-inner {
  width: min(100% - 28px, 1180px);
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.logo, .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 850;
  letter-spacing: -0.02em;
}
.logo img, .footer-logo img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 8px 24px rgba(41, 128, 254, 0.20); }
.site-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 74px;
  display: none;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.site-nav.is-open { display: grid; gap: 4px; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 14px;
  color: #4c5870;
  font-size: 0.96rem;
  font-weight: 650;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: rgba(41,128,254,0.08); }
.nav-toggle {
  width: 46px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 14px;
  display: inline-grid;
  place-content: center;
  gap: 5px;
  cursor: pointer;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 999px; display: block; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(41, 128, 254, 0.26);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  border: none;
  white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(41,128,254,0.32); }
.text-link {
  color: var(--primary);
  font-weight: 760;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.text-link::after { content: "→"; }
.web3-hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 48px;
  background:
    radial-gradient(circle at 10% 10%, rgba(41,128,254,0.16), transparent 35%),
    radial-gradient(circle at 85% 20%, rgba(41,128,254,0.13), transparent 31%),
    linear-gradient(180deg, #ffffff 0%, #f2f7ff 100%);
}
.web3-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(41,128,254,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(41,128,254,0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.45), transparent 76%);
  pointer-events: none;
}
.hero-grid { position: relative; display: grid; gap: 36px; align-items: center; }
.hero-copy { max-width: 720px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin: 28px 0 22px; }
.security-tags, .hero-tags, .inline-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span, .hero-tags span, .inline-tags span {
  border: 1px solid rgba(41,128,254,0.18);
  background: rgba(255,255,255,0.78);
  color: #235079;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
}
.hero-visual {
  position: relative;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(221,230,243,0.9);
  box-shadow: var(--shadow);
  min-height: 360px;
  display: grid;
  place-items: center;
}
.hero-device {
  width: min(360px, 90%);
  filter: drop-shadow(0 22px 28px rgba(23, 32, 51, 0.15));
}
.float-chip {
  position: absolute;
  padding: 9px 13px;
  border-radius: 999px;
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--line);
  color: var(--primary);
  font-weight: 800;
  box-shadow: 0 12px 26px rgba(35,81,140,0.12);
  font-size: 0.86rem;
}
.chip-a { top: 20px; left: 18px; }
.chip-b { right: 16px; top: 76px; }
.chip-c { left: 14px; bottom: 76px; }
.chip-d { right: 22px; bottom: 24px; }
.ecosystem-nav { padding-top: 36px; }
.ecosystem-grid, .category-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
.ecosystem-card, .service-card, .risk-card, .faq-card, .info-card, .step-card, .guide-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: 0 12px 32px rgba(35, 81, 140, 0.07);
}
.ecosystem-card { min-height: 184px; display: flex; flex-direction: column; justify-content: space-between; }
.ecosystem-card .mini-label { width: fit-content; color: var(--primary); background: rgba(41,128,254,0.08); border-radius: 999px; padding: 4px 10px; font-size: 0.8rem; font-weight: 800; margin-bottom: 12px; }
.split-section { display: grid; gap: 26px; align-items: center; }
.web3-section, .digital-assets-section, .submit-chain-section { background: #fff; }
.hardware-wallet-section, .swap-section, .privacy-section, .developer-center-section { background: linear-gradient(180deg, #f5f9ff 0%, #ffffff 100%); }
.feature-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px;
  box-shadow: var(--shadow);
}
.feature-panel.blue { background: linear-gradient(135deg, #f6fbff 0%, #ffffff 58%, #eef5ff 100%); }
.feature-list { display: grid; gap: 12px; margin: 22px 0; padding: 0; list-style: none; }
.feature-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: start;
  color: #40506a;
}
.feature-list li::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 6px rgba(41,128,254,0.10);
}
.showcase-image {
  background: linear-gradient(135deg, #f4f8ff, #ffffff);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}
.showcase-image img { margin: 0 auto; max-height: 420px; object-fit: contain; }
.privacy-cards, .developer-grid, .risk-grid, .faq-grid, .help-grid { display: grid; gap: 16px; }
.safety-panel {
  border-left: 4px solid var(--primary);
  padding: 20px;
  border-radius: 22px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.process-steps { display: grid; gap: 16px; counter-reset: step; }
.step-card { position: relative; padding-top: 26px; }
.step-number {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 16px;
  color: #fff;
  background: var(--primary);
  font-weight: 850;
}
.risk-card { border-top: 4px solid var(--primary); }
.risk-card strong { display: block; color: var(--ink); margin-bottom: 6px; }
.code-panel {
  background: #172033;
  color: #e8f1ff;
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 18px 46px rgba(23,32,51,0.18);
  overflow: hidden;
}
.code-panel pre { margin: 0; white-space: pre-wrap; color: #d9e9ff; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92rem; line-height: 1.75; }
.code-panel .code-line { display: block; color: #a8c8ff; }
.cta-section {
  padding: 74px 0;
  background: linear-gradient(135deg, #eef5ff 0%, #ffffff 62%, #f6f9ff 100%);
  text-align: center;
}
.cta-box {
  width: min(100% - 36px, 860px);
  margin: 0 auto;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 22px;
  box-shadow: var(--shadow);
}
.page-hero {
  padding: 64px 0 38px;
  background: linear-gradient(180deg, #f2f7ff 0%, #ffffff 100%);
}
.page-hero-grid { display: grid; gap: 24px; align-items: center; }
.page-summary { font-size: 1.08rem; color: #4e5b72; max-width: 780px; }
.content-layout { display: grid; gap: 22px; }
.article-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 12px 32px rgba(35,81,140,0.06);
}
.aside-panel { display: grid; gap: 16px; align-content: start; }
.check-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.check-list li { padding: 12px 14px; border: 1px solid var(--line); border-radius: 16px; background: #fbfdff; }
.check-list li strong { color: var(--ink); display: block; }
.download-panel { margin-top: 22px; padding: 22px; border-radius: var(--radius-md); background: linear-gradient(135deg, #f6f9ff, #ffffff); border: 1px solid var(--line); }
.faq-item {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 10px 26px rgba(35,81,140,0.05);
}
.faq-item h2, .faq-item h3 { font-size: 1.12rem; margin-bottom: 8px; }
.site-footer {
  background: #f5f8fd;
  border-top: 1px solid var(--line);
  padding-top: 46px;
}
.footer-grid { display: grid; gap: 26px; }
.site-footer h3 { font-size: 1rem; margin-bottom: 12px; }
.site-footer a { display: block; color: #58647a; margin: 7px 0; }
.site-footer p { color: #667085; margin-top: 14px; }
.footer-bottom {
  width: min(100% - 36px, 1160px);
  margin: 34px auto 0;
  padding: 18px 0 26px;
  border-top: 1px solid var(--line);
  color: #718096;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
@media (min-width: 680px) {
  .ecosystem-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid, .privacy-cards, .developer-grid, .risk-grid, .faq-grid, .help-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}
@media (min-width: 960px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 2px;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-nav a { font-size: 0.92rem; padding: 8px 10px; }
  .hero-grid { grid-template-columns: 1.06fr 0.94fr; }
  .web3-hero { padding: 92px 0 68px; }
  .split-section, .page-hero-grid, .content-layout { grid-template-columns: 1.05fr 0.95fr; }
  .split-section.reverse > :first-child { order: 2; }
  .split-section.reverse > :last-child { order: 1; }
  .ecosystem-grid { grid-template-columns: repeat(7, 1fr); }
  .ecosystem-card { grid-column: span 1; padding: 18px; }
  .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
  .risk-grid { grid-template-columns: repeat(4, 1fr); }
  .faq-grid { grid-template-columns: repeat(3, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .category-grid { grid-template-columns: repeat(4, 1fr); }
  .developer-grid { grid-template-columns: 1fr 1fr 1.2fr; }
  .article-card { padding: 34px; }
}
@media (min-width: 1160px) {
  .site-nav a { padding: 9px 12px; }
  .ecosystem-card:nth-child(2), .ecosystem-card:nth-child(3), .ecosystem-card:nth-child(4), .ecosystem-card:nth-child(5), .ecosystem-card:nth-child(6) { grid-column: span 1; }
}
@media (max-width: 420px) {
  .container, .narrow-container { width: min(100% - 26px, 1160px); }
  .hero-actions { align-items: stretch; }
  .download-btn { width: 100%; }
  .float-chip { position: static; margin: 5px; display: inline-flex; }
  .hero-visual { display: block; min-height: auto; text-align: center; }
  .hero-tags { margin-top: 16px; }
  .section { padding: 54px 0; }
  .page-hero { padding-top: 46px; }
}