:root {
  --primary: #2980FE;
  --primary-dark: #1767d8;
  --primary-soft: #eaf3ff;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-blue: #f3f8ff;
  --text: #1f2937;
  --muted: #667085;
  --line: #e5eaf1;
  --card: #ffffff;
  --shadow: 0 18px 50px rgba(41, 128, 254, 0.10);
  --radius: 26px;
  --max: 1180px;
}
* { 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, #fff 0%, #f8fbff 48%, #fff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(100% - 32px, var(--max)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-shell { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.02em; color: #122033; }
.logo-img { width: 38px; height: 38px; border-radius: 12px; box-shadow: 0 8px 22px rgba(41,128,254,0.2); }
.site-nav { display: none; position: absolute; left: 16px; right: 16px; top: 70px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
.site-nav.is-open { display: grid; gap: 8px; }
.site-nav a { padding: 10px 12px; color: #344054; border-radius: 12px; font-size: 15px; }
.site-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.nav-toggle { width: 44px; height: 44px; display: inline-grid; place-content: center; gap: 5px; border: 1px solid var(--line); background: #fff; border-radius: 14px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: #1f2937; border-radius: 2px; }
.section { padding: 76px 0; }
.section-tight { padding: 50px 0; }
.section-title { font-size: clamp(30px, 5vw, 52px); line-height: 1.14; margin: 0 0 16px; letter-spacing: -0.05em; }
.section-title.small { font-size: clamp(26px, 4vw, 42px); }
.lead { color: var(--muted); font-size: 17px; max-width: 760px; margin: 0; }
.badge, .category-badge {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--primary); background: var(--primary-soft); border: 1px solid #d6e8ff;
  border-radius: 999px; padding: 7px 12px; font-weight: 700; font-size: 13px;
}
.badge::before, .category-badge::before { content: ""; width: 7px; height: 7px; border-radius: 99px; background: var(--primary); }
.download-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 13px 24px;
  background: var(--primary); color: #fff; border-radius: 999px;
  font-weight: 800; border: 1px solid var(--primary);
  box-shadow: 0 14px 30px rgba(41,128,254,0.24);
  transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}
.download-btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 18px 38px rgba(41,128,254,0.30); }
.text-link { color: var(--primary); font-weight: 750; display: inline-flex; gap: 6px; align-items: center; }
.text-link::after { content: "→"; }
.web3-hero {
  position: relative;
  padding: 86px 0 52px;
  background:
    radial-gradient(circle at 85% 10%, rgba(41,128,254,0.20), transparent 30%),
    radial-gradient(circle at 6% 8%, rgba(41,128,254,0.12), transparent 28%),
    linear-gradient(180deg, #fff 0%, #f6faff 100%);
  overflow: hidden;
}
.web3-hero::after {
  content: "";
  position: absolute; inset: auto -120px -160px auto;
  width: 420px; height: 420px; border: 1px solid rgba(41,128,254,0.18); border-radius: 50%;
}
.hero-grid { position: relative; z-index: 1; display: grid; gap: 34px; align-items: center; }
.hero-copy h1 { font-size: clamp(42px, 8vw, 78px); line-height: 1.02; letter-spacing: -0.07em; margin: 16px 0 18px; }
.hero-copy p { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-top: 24px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-tags span, .mini-tag { padding: 8px 12px; border: 1px solid var(--line); background: rgba(255,255,255,0.85); border-radius: 999px; color: #344054; font-weight: 650; font-size: 13px; }
.hero-visual { position: relative; min-height: 360px; display: grid; place-items: center; }
.product-orbit {
  position: relative; width: min(420px, 92vw); min-height: 360px;
  display: grid; place-items: center; border-radius: 36px;
  background: linear-gradient(160deg, rgba(255,255,255,0.86), rgba(234,243,255,0.85));
  border: 1px solid rgba(41,128,254,0.14); box-shadow: var(--shadow);
}
.product-orbit img { max-height: 330px; object-fit: contain; filter: drop-shadow(0 20px 40px rgba(18,32,51,0.16)); }
.float-label { position: absolute; padding: 8px 12px; background: #fff; border: 1px solid var(--line); border-radius: 999px; color: #1f2937; font-size: 13px; font-weight: 750; box-shadow: 0 12px 32px rgba(31,41,55,0.08); }
.float-label.l1 { left: 8px; top: 48px; }
.float-label.l2 { right: 0; top: 96px; }
.float-label.l3 { left: 18px; bottom: 80px; }
.float-label.l4 { right: 30px; bottom: 34px; }
.ecosystem-nav { padding: 44px 0 70px; }
.eco-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.eco-head p { max-width: 560px; margin: 0; color: var(--muted); }
.ecosystem-grid, .category-grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
.ecosystem-card, .category-card {
  background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 22px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.04); min-height: 178px;
  display: flex; flex-direction: column; justify-content: space-between; gap: 16px;
}
.ecosystem-card h3, .category-card h3 { margin: 0 0 8px; font-size: 20px; letter-spacing: -0.03em; }
.ecosystem-card p, .category-card p { color: var(--muted); margin: 0; font-size: 15px; }
.ecosystem-card strong { color: var(--primary); font-size: 13px; }
.feature-split { display: grid; gap: 28px; align-items: center; }
.feature-split.reverse .feature-media { order: -1; }
.feature-card, .feature-media, .safety-panel, .tech-panel, .cta-section, .article-card, .faq-item, .risk-card, .step-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 34px rgba(17,24,39,0.04);
}
.feature-card { padding: clamp(24px, 5vw, 44px); }
.feature-media { padding: 20px; overflow: hidden; background: linear-gradient(160deg, #fff, var(--bg-blue)); }
.feature-media img { width: 100%; max-height: 420px; object-fit: contain; border-radius: 20px; }
.feature-list { display: grid; gap: 12px; margin: 24px 0; padding: 0; list-style: none; }
.feature-list li { display: grid; grid-template-columns: 26px 1fr; gap: 10px; color: #475467; }
.feature-list li::before { content: ""; width: 12px; height: 12px; margin-top: 8px; border-radius: 4px; background: var(--primary); box-shadow: 0 0 0 6px var(--primary-soft); }
.web3-section { background: #fff; }
.hardware-wallet-section, .privacy-section { background: linear-gradient(180deg, var(--bg-blue), #fff); }
.digital-assets-section { background: #fff; }
.swap-section { background: linear-gradient(180deg, #fff, var(--bg-soft)); }
.submit-chain-section { background: #fff; }
.developer-center-section { background: linear-gradient(160deg, #f8fbff, #ffffff); }
.safety-panel { padding: 26px; background: linear-gradient(160deg, #ffffff, #f4f8ff); }
.safety-grid { display: grid; gap: 14px; margin-top: 22px; }
.safety-note { border-left: 4px solid var(--primary); background: #fff; padding: 16px; border-radius: 16px; color: #475467; }
.submit-panel { display: grid; gap: 16px; grid-template-columns: 1fr; margin-top: 24px; }
.submit-box { border: 1px solid var(--line); border-radius: 22px; padding: 20px; background: #fff; }
.submit-box h3 { margin: 0 0 8px; }
.submit-box p { color: var(--muted); margin: 0; }
.tech-panel { padding: 22px; background: #101828; color: #e5e7eb; overflow: hidden; }
.tech-panel pre { margin: 0; white-space: pre-wrap; color: #dbeafe; font-size: 14px; line-height: 1.8; }
.tech-panel .code-line { color: #93c5fd; }
.process-steps { display: grid; gap: 16px; margin-top: 28px; }
.step-card { padding: 22px; position: relative; }
.step-no { width: 38px; height: 38px; display: inline-grid; place-items: center; background: var(--primary); color: #fff; border-radius: 14px; font-weight: 800; margin-bottom: 14px; }
.step-card h3 { margin: 0 0 8px; }
.step-card p { color: var(--muted); margin: 0 0 14px; }
.risk-grid { display: grid; gap: 16px; margin-top: 28px; }
.risk-card { padding: 20px; border-top: 4px solid var(--primary); }
.risk-card h3 { margin: 0 0 8px; }
.risk-card p { margin: 0 0 10px; color: var(--muted); }
.risk-card strong { display: block; color: #344054; font-size: 14px; }
.faq-grid { display: grid; gap: 14px; margin-top: 26px; }
.faq-item { padding: 20px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section { margin: 40px auto 80px; padding: clamp(30px, 7vw, 58px); text-align: center; background: radial-gradient(circle at 75% 15%, rgba(41,128,254,0.18), transparent 32%), linear-gradient(160deg, #ffffff, #eef6ff); }
.cta-section p { color: var(--muted); max-width: 680px; margin: 0 auto 24px; }
.page-hero { padding: 70px 0 42px; background: radial-gradient(circle at 88% 10%, rgba(41,128,254,0.14), transparent 28%), linear-gradient(180deg, #fff, #f6faff); }
.page-hero .page-hero-inner { max-width: 880px; }
.page-hero h1 { font-size: clamp(36px, 7vw, 66px); line-height: 1.06; letter-spacing: -0.06em; margin: 16px 0; }
.page-hero p { color: var(--muted); font-size: 18px; margin: 0 0 24px; }
.article-layout { display: grid; gap: 22px; align-items: start; padding: 46px 0 80px; }
.article-main { display: grid; gap: 20px; }
.article-card { padding: clamp(22px, 5vw, 34px); }
.article-card h2 { margin: 0 0 12px; font-size: 26px; letter-spacing: -0.04em; }
.article-card p { color: #475467; margin: 0 0 14px; }
.article-card p:last-child { margin-bottom: 0; }
.check-list { display: grid; gap: 12px; padding: 0; margin: 18px 0 0; list-style: none; }
.check-list li { padding: 13px 14px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 16px; color: #475467; }
.side-panel { position: sticky; top: 92px; display: grid; gap: 14px; }
.side-card { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 10px 30px rgba(17,24,39,0.04); }
.side-card h3 { margin: 0 0 10px; font-size: 18px; }
.side-card p { margin: 0; color: var(--muted); font-size: 15px; }
.side-links { display: grid; gap: 8px; margin-top: 12px; }
.side-links a { color: var(--primary); font-weight: 700; }
.download-steps { counter-reset: dl; display: grid; gap: 14px; margin-top: 20px; }
.download-step { counter-increment: dl; display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 16px; border: 1px solid var(--line); background: #fff; border-radius: 18px; }
.download-step::before { content: counter(dl); width: 40px; height: 40px; border-radius: 14px; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 800; }
.site-footer { background: #111827; color: #d1d5db; padding: 54px 0 22px; }
.footer-grid { display: grid; gap: 24px; }
.footer-brand { color: #fff; font-weight: 850; font-size: 22px; margin-bottom: 10px; }
.site-footer p { margin: 0; color: #aeb8c7; }
.site-footer h3 { color: #fff; font-size: 16px; margin: 0 0 12px; }
.site-footer a { display: block; color: #cbd5e1; margin: 7px 0; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.10); margin-top: 34px; padding-top: 18px; display: grid; gap: 8px; font-size: 13px; color: #9ca3af; }
@media (min-width: 640px) {
  .ecosystem-grid, .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .submit-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav { display: flex; position: static; padding: 0; border: 0; box-shadow: none; background: transparent; border-radius: 0; align-items: center; gap: 2px; }
  .site-nav a { font-size: 14px; padding: 8px 10px; }
  .hero-grid { grid-template-columns: minmax(0, 1.05fr) minmax(380px, .95fr); }
  .feature-split { grid-template-columns: minmax(0, 1fr) minmax(0, .95fr); }
  .feature-split.reverse .feature-media { order: 2; }
  .ecosystem-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
  .safety-grid { grid-template-columns: repeat(3, 1fr); }
  .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 310px; gap: 30px; }
  .footer-grid { grid-template-columns: 1.4fr .8fr .8fr .8fr; }
  .footer-bottom { display: flex; align-items: center; justify-content: space-between; }
}
@media (min-width: 1120px) {
  .site-nav a { padding: 9px 12px; }
}
@media (max-width: 420px) {
  .container { width: min(100% - 24px, var(--max)); }
  .hero-actions { align-items: stretch; }
  .download-btn { width: 100%; }
  .float-label { font-size: 12px; padding: 7px 9px; }
  .product-orbit { min-height: 310px; }
  .section { padding: 58px 0; }
}