:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-pale: #F4F8FF;
  --bg: #F7F9FC;
  --panel: #FFFFFF;
  --line: #E5EAF2;
  --line-strong: #D7E0ED;
  --text: #202B3D;
  --muted: #657083;
  --deep: #0F1B2D;
  --soft-gray: #F2F5F9;
  --radius: 24px;
  --radius-lg: 30px;
  --shadow: 0 18px 50px rgba(32, 43, 61, 0.08);
}

* { 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(--text);
  background: linear-gradient(180deg, #FFFFFF 0%, #F7FAFF 36%, #F7F9FC 100%);
  line-height: 1.72;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
main { min-height: 70vh; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand, .footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: 0.02em;
}
.logo, .footer-brand img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 10px;
}
.nav-toggle { display: none; }
.nav-toggle-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 700;
}
.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 68px;
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.nav-toggle:checked ~ .site-nav { display: grid; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}
.site-nav a.active, .site-nav a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.container, .section, .web3-dashboard-hero, .page-hero, .article-layout, .site-footer .footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}
.section { padding: 42px 0; }
.section-heading {
  margin-bottom: 22px;
  display: grid;
  gap: 8px;
}
.section-kicker, .category-badge, .status-pill {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 30px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
  font-size: 13px;
}
h1, h2, h3 { line-height: 1.18; color: var(--deep); margin: 0; }
h1 { font-size: clamp(34px, 8vw, 68px); letter-spacing: -0.04em; }
h2 { font-size: clamp(26px, 5vw, 42px); letter-spacing: -0.03em; }
h3 { font-size: 20px; }
p { margin: 0; color: var(--muted); }
.lead { font-size: clamp(16px, 3vw, 19px); color: #445064; }

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #1568E8);
  font-weight: 900;
  box-shadow: 0 14px 28px rgba(41, 128, 254, 0.22);
  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); }

.web3-dashboard-hero {
  padding: 44px 0 34px;
  display: grid;
  gap: 26px;
}
.hero-copy {
  display: grid;
  gap: 18px;
  align-content: center;
}
.hero-tags, .mini-tags, .inline-links, .confirm-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-tags span, .mini-tags span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #46536A;
  background: #fff;
  font-size: 13px;
  font-weight: 700;
}
.dashboard-visual {
  position: relative;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at 25% 20%, rgba(41,128,254,.14), transparent 36%), #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.dashboard-visual::before {
  content: "";
  position: absolute;
  inset: auto -20% -35% 10%;
  height: 210px;
  background: linear-gradient(90deg, rgba(41,128,254,.1), rgba(255,255,255,.2));
  border-radius: 50%;
}
.product-shot {
  position: relative;
  width: min(310px, 78%);
  margin: 0 auto 16px;
  filter: drop-shadow(0 24px 35px rgba(15, 27, 45, .12));
}
.status-stack {
  position: relative;
  display: grid;
  gap: 10px;
}
.status-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.9);
}
.status-card strong { color: var(--deep); }
.status-card span { color: var(--primary); font-weight: 900; font-size: 13px; }

.service-index {
  display: grid;
  gap: 14px;
}
.service-card, .risk-card, .faq-item, .step-card, .info-card, .article-card, .side-panel, .download-panel {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(32,43,61,.05);
}
.service-card {
  padding: 18px;
  display: grid;
  gap: 12px;
  min-height: 178px;
}
.service-card .chip {
  color: var(--primary);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .06em;
}
.service-card a, .inline-link, .text-link {
  color: var(--primary);
  font-weight: 900;
}
.service-card:nth-child(1), .service-card:nth-child(3) { background: linear-gradient(180deg, #FFFFFF, #F5F9FF); }

.feature-shell {
  display: grid;
  gap: 22px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow);
}
.feature-copy { display: grid; gap: 16px; align-content: center; }
.feature-points { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.feature-points li, .checklist li, .confirm-list span {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 12px;
  background: var(--primary-pale);
  color: #43506A;
}
.image-panel {
  border-radius: 24px;
  background: linear-gradient(160deg, var(--primary-soft), #fff);
  border: 1px solid var(--line);
  padding: 18px;
  display: grid;
  place-items: center;
  min-height: 240px;
}
.image-panel img { max-height: 380px; object-fit: contain; }
.digital-assets-hub .feature-shell { background: linear-gradient(135deg, #fff 0%, #F4F8FF 100%); }
.web3-ecosystem-section .feature-shell { background: #fff; }
.hardware-wallet-section { background: linear-gradient(180deg, rgba(234,243,255,.65), rgba(247,249,252,.4)); }
.hardware-wallet-section .feature-shell { box-shadow: none; }
.swap-service-section .feature-shell { background: linear-gradient(145deg, #fff, #F7FAFF); }

.boundary-grid, .submit-grid, .developer-grid, .category-grid, .risk-grid, .faq-grid {
  display: grid;
  gap: 14px;
}
.info-card, .article-card { padding: 18px; display: grid; gap: 10px; }
.info-card strong { color: var(--deep); }
.privacy-boundary-section .info-card { border-left: 4px solid var(--primary); }
.submit-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, #F7FAFF, #fff);
}
.code-panel {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid var(--line-strong);
  background: #F8FAFD;
  color: #344159;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow: auto;
}
.code-panel span { color: var(--primary); }

.process-steps { display: grid; gap: 14px; counter-reset: steps; }
.step-card {
  padding: 18px;
  display: grid;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.step-card::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  color: var(--primary);
  font-weight: 900;
  font-size: 13px;
}
.risk-card { padding: 18px; display: grid; gap: 10px; border-top: 4px solid var(--primary); }
.risk-card b { color: var(--deep); }
.faq-item { padding: 18px; }
.faq-item h3 { margin-bottom: 8px; font-size: 18px; }
.cta-section { padding: 54px 0 70px; }
.download-panel {
  padding: 30px 20px;
  text-align: center;
  display: grid;
  justify-items: center;
  gap: 15px;
  background: radial-gradient(circle at top, rgba(41,128,254,.13), transparent 42%), #fff;
}

.page-hero {
  padding: 42px 0 24px;
  display: grid;
  gap: 16px;
}
.page-hero.compact { max-width: 920px; }
.page-hero .download-btn { margin-top: 4px; }
.article-layout {
  padding: 18px 0 58px;
  display: grid;
  gap: 18px;
}
.article-main {
  display: grid;
  gap: 18px;
}
.article-block {
  padding: 22px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius);
  display: grid;
  gap: 14px;
}
.checklist {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.side-panel { padding: 20px; align-self: start; display: grid; gap: 12px; }
.side-panel a { color: var(--primary); font-weight: 800; }
.notice-box {
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: 18px;
  padding: 16px;
  background: var(--primary-pale);
}
.about-grid { display: grid; gap: 16px; }
.about-card { padding: 20px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
.download-steps { display: grid; gap: 12px; margin-top: 10px; }
.download-step { padding: 16px; border-radius: 18px; border: 1px solid var(--line); background: #fff; }

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 34px 0 18px;
}
.footer-inner {
  display: grid;
  gap: 22px;
}
.footer-brand img { width: 32px; height: 32px; }
.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.footer-links a { color: var(--muted); font-weight: 700; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
  width: min(1180px, calc(100% - 32px));
  margin: 22px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (min-width: 720px) {
  .service-index { grid-template-columns: repeat(2, 1fr); }
  .boundary-grid, .submit-grid, .developer-grid, .category-grid, .risk-grid, .faq-grid, .about-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .download-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-links { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 980px) {
  .nav-toggle-label { display: none; }
  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-nav a { white-space: nowrap; }
  .web3-dashboard-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
    align-items: center;
    padding: 70px 0 44px;
  }
  .service-index { grid-template-columns: repeat(4, 1fr); }
  .service-index .service-card:nth-child(1), .service-index .service-card:nth-child(7) { grid-column: span 2; }
  .feature-shell { grid-template-columns: 1fr 1fr; align-items: center; padding: 30px; }
  .feature-shell.reverse .feature-copy { order: 2; }
  .feature-shell.reverse .image-panel { order: 1; }
  .boundary-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .submit-grid { grid-template-columns: 1.1fr .9fr; }
  .developer-grid { grid-template-columns: 1fr 1fr; }
  .risk-grid { grid-template-columns: repeat(4, 1fr); }
  .faq-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
  .footer-inner { grid-template-columns: 1fr 1.5fr; align-items: start; }
}

@media (max-width: 420px) {
  .site-nav { grid-template-columns: 1fr; }
  h1 { font-size: 32px; }
  .feature-shell, .article-block, .download-panel { padding: 18px; }
  .download-btn { width: 100%; }
}