:root {
  --primary: #2980FE;
  --primary-dark: #1264d8;
  --primary-soft: #eef5ff;
  --bg: #ffffff;
  --bg-soft: #f6f9fe;
  --bg-panel: #f8fbff;
  --text: #1f2937;
  --muted: #607086;
  --border: #e4ebf5;
  --card: #ffffff;
  --shadow: 0 16px 40px rgba(32, 82, 160, 0.08);
  --radius-lg: 26px;
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 36%, #ffffff 100%);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(100% - 32px, 1180px); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.logo, .footer-logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .2px; }
.logo img, .footer-logo img { width: 38px; height: 38px; border-radius: 12px; object-fit: contain; }
.nav-toggle { display: none; }
.nav-toggle-label { width: 42px; height: 42px; display: grid; align-content: center; gap: 5px; cursor: pointer; border: 1px solid var(--border); border-radius: 14px; padding: 9px; }
.nav-toggle-label span { height: 2px; background: var(--text); border-radius: 10px; }
.site-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 76px;
  display: none;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.site-nav a { display: block; padding: 10px 12px; color: var(--muted); border-radius: 12px; font-size: 15px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.nav-toggle:checked ~ .site-nav { display: block; }
.hero-wrap { padding: 46px 0 28px; overflow: hidden; }
.product-hero {
  position: relative;
  display: grid;
  gap: 34px;
  align-items: center;
  padding: 34px 0 26px;
}
.product-hero::before {
  content: "";
  position: absolute;
  inset: -120px -30px auto auto;
  width: 290px;
  height: 290px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41,128,254,.20), rgba(41,128,254,0) 70%);
  z-index: -1;
}
.eyebrow, .category-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); font-weight: 700; font-size: 13px; }
h1, h2, h3 { line-height: 1.2; color: #172033; }
h1 { margin: 16px 0 18px; font-size: clamp(34px, 9vw, 64px); letter-spacing: -1px; }
h2 { margin: 0 0 14px; font-size: clamp(26px, 5vw, 42px); }
h3 { margin: 0 0 10px; font-size: 20px; }
p { margin: 0 0 16px; color: var(--muted); }
.lead { font-size: 18px; max-width: 650px; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 26px 0 20px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(41,128,254,.24);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 16px 34px rgba(41,128,254,.30); }
.safe-tags, .mini-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.safe-tags span, .mini-tags span { padding: 8px 12px; color: #31506f; background: #fff; border: 1px solid var(--border); border-radius: 999px; font-size: 13px; }
.app-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 380px;
  padding: 22px;
  background: linear-gradient(135deg, #f7fbff 0%, #eaf3ff 100%);
  border: 1px solid var(--border);
  border-radius: 34px;
  box-shadow: var(--shadow);
}
.app-visual img { max-height: 430px; object-fit: contain; filter: drop-shadow(0 22px 34px rgba(28, 73, 140, .16)); }
.float-card { position: absolute; left: 18px; top: 22px; width: 160px; padding: 14px; background: rgba(255,255,255,.92); border: 1px solid var(--border); border-radius: 20px; box-shadow: var(--shadow); }
.float-card strong { display: block; color: var(--text); }
.float-card small { color: var(--muted); }
.visual-tag { position: absolute; right: 18px; padding: 8px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--border); color: var(--primary); font-weight: 700; font-size: 13px; box-shadow: 0 10px 24px rgba(32,82,160,.08); }
.visual-tag.one { top: 46px; }
.visual-tag.two { top: 92px; }
.visual-tag.three { top: 138px; }
.section { padding: 58px 0; }
.section-head { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.section-head p { max-width: 720px; }
.feature-shortcuts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
.shortcut-card, .feature-card, .category-card, .risk-card, .faq-item, .note-card, .step-card, .plain-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(32,82,160,.05);
}
.shortcut-card { padding: 18px; min-height: 150px; }
.shortcut-card .icon-dot { width: 34px; height: 34px; display: grid; place-items: center; margin-bottom: 12px; border-radius: 12px; color: var(--primary); background: var(--primary-soft); font-weight: 900; }
.shortcut-card p, .category-card p, .risk-card p, .step-card p { font-size: 14px; }
.text-link { display: inline-flex; color: var(--primary); font-weight: 800; margin-top: 8px; }
.product-section, .cold-wallet-section, .swap-section, .dapp-section {
  display: grid;
  gap: 26px;
  align-items: center;
  padding: 24px;
  border-radius: 34px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow);
}
.cold-wallet-section { background: linear-gradient(135deg, #f8fbff 0%, #eef5ff 100%); }
.swap-section { background: linear-gradient(135deg, #ffffff 0%, #f4f8ff 100%); }
.dapp-section { background: #f8fbff; }
.product-image { display: grid; place-items: center; min-height: 260px; padding: 18px; background: var(--bg-panel); border-radius: 28px; border: 1px solid var(--border); }
.product-image img { max-height: 360px; object-fit: contain; }
.bullet-list, .check-list { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.bullet-list li, .check-list li { position: relative; padding-left: 24px; color: #38506a; }
.bullet-list li::before, .check-list li::before { content: ""; position: absolute; left: 0; top: .68em; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.process-steps { display: grid; gap: 14px; }
.step-card { padding: 20px; position: relative; overflow: hidden; }
.step-card .num { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-bottom: 12px; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 900; }
.risk-grid, .category-grid, .info-grid, .faq-grid { display: grid; gap: 16px; }
.risk-card { padding: 18px; border-left: 4px solid var(--primary); }
.risk-card strong { display: block; color: #172033; margin-bottom: 6px; }
.category-card { padding: 18px; }
.category-card strong { display: block; margin-bottom: 8px; color: var(--text); font-size: 17px; }
.faq-item { padding: 18px; }
.faq-item h3 { font-size: 17px; }
.cta-section {
  text-align: center;
  padding: 42px 22px;
  border-radius: 34px;
  background: linear-gradient(135deg, #eef5ff 0%, #ffffff 72%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.page-hero { padding: 52px 0 28px; }
.page-hero-card { padding: 30px; border-radius: 34px; background: linear-gradient(135deg, #fff 0%, #f0f6ff 100%); border: 1px solid var(--border); box-shadow: var(--shadow); }
.page-hero-card h1 { font-size: clamp(32px, 6vw, 52px); margin-bottom: 14px; }
.content-layout { display: grid; gap: 24px; align-items: start; padding: 34px 0 60px; }
.article-card { padding: 24px; background: #fff; border: 1px solid var(--border); border-radius: 28px; box-shadow: var(--shadow); }
.article-card h2 { font-size: 26px; margin-top: 26px; }
.article-card h2:first-child { margin-top: 0; }
.sidebar { display: grid; gap: 16px; }
.note-card { padding: 18px; background: var(--bg-panel); }
.note-card strong { display: block; color: #172033; margin-bottom: 8px; }
.guide-actions { margin-top: 24px; }
.download-panel { max-width: 760px; margin: 0 auto; text-align: center; }
.download-steps { counter-reset: step; display: grid; gap: 14px; margin: 24px 0; text-align: left; }
.download-steps li { list-style: none; padding: 18px; border-radius: 18px; border: 1px solid var(--border); background: #fff; }
.download-steps li::before { counter-increment: step; content: counter(step); display: inline-grid; place-items: center; width: 28px; height: 28px; margin-right: 10px; border-radius: 10px; background: var(--primary); color: #fff; font-weight: 900; }
.about-grid { display: grid; gap: 18px; }
.plain-card { padding: 22px; }
.site-footer { background: #f4f8fe; border-top: 1px solid var(--border); padding: 38px 0 18px; }
.footer-grid { display: grid; gap: 24px; }
.footer-grid a { display: block; color: var(--muted); margin: 8px 0; }
.footer-grid a:hover { color: var(--primary); }
.footer-bottom { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }
@media (min-width: 720px) {
  .feature-shortcuts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid, .info-grid, .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 980px) {
  .header-inner { min-height: 78px; }
  .nav-toggle-label { display: none; }
  .site-nav { position: static; display: flex; align-items: center; gap: 4px; padding: 0; background: transparent; border: none; border-radius: 0; box-shadow: none; }
  .site-nav a { padding: 8px 11px; font-size: 14px; }
  .product-hero { grid-template-columns: 1.02fr .98fr; padding: 54px 0 38px; }
  .product-section, .cold-wallet-section, .swap-section, .dapp-section { grid-template-columns: 1fr 1fr; padding: 36px; }
  .cold-wallet-section .product-image, .dapp-section .product-image { order: -1; }
  .feature-shortcuts { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .category-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .content-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; }
}
@media (max-width: 420px) {
  .container { width: min(100% - 24px, 1180px); }
  .feature-shortcuts { grid-template-columns: 1fr; }
  .app-visual { min-height: 330px; }
  .float-card { position: static; width: 100%; margin-bottom: 12px; }
  .visual-tag { position: static; margin: 8px 0 0; justify-self: end; }
}