:root {
  --primary: #2980FE;
  --primary-soft: #eaf3ff;
  --primary-lighter: #f4f8ff;
  --text: #1f2937;
  --muted: #64748b;
  --soft: #f7f9fc;
  --line: #e5edf7;
  --card: #ffffff;
  --deep: #0f172a;
  --radius: 24px;
  --shadow: 0 18px 50px rgba(34, 78, 137, .10);
  --shadow-soft: 0 10px 30px rgba(41, 128, 254, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 52%, #ffffff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.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 { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--deep); }
.brand-logo { width: 34px; height: 34px; object-fit: contain; border-radius: 10px; }
.brand-text { letter-spacing: -.02em; }
.nav-check { display: none; }
.nav-toggle { display: flex; flex-direction: column; gap: 5px; width: 42px; height: 42px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.nav-toggle span { width: 18px; height: 2px; background: var(--deep); border-radius: 9px; }
.site-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 68px;
  display: none;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 22px;
  padding: 10px;
}
.nav-check:checked ~ .site-nav { display: flex; }
.site-nav a { padding: 11px 14px; border-radius: 14px; color: #475569; font-size: 15px; }
.site-nav a:hover, .site-nav a.active { background: var(--primary-soft); color: var(--primary); }

.section, .app-hero, .page-hero, .cta-section { max-width: 1180px; margin: 0 auto; padding: 64px 18px; }
.app-hero {
  display: grid;
  gap: 36px;
  position: relative;
}
.app-hero:before {
  content: "";
  position: absolute;
  inset: 16px 18px auto auto;
  width: 230px;
  height: 230px;
  background: radial-gradient(circle, rgba(41,128,254,.22), rgba(41,128,254,0) 70%);
  pointer-events: none;
}
.hero-kicker, .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid #d9eaff;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}
h1, h2, h3 { color: var(--deep); line-height: 1.2; margin: 0; letter-spacing: -.035em; }
h1 { font-size: clamp(34px, 8vw, 64px); margin-top: 16px; }
h2 { font-size: clamp(26px, 5vw, 42px); }
h3 { font-size: 21px; }
p { margin: 0; color: var(--muted); }
.hero-desc { margin-top: 18px; font-size: 17px; max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 26px; }
.download-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 13px 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 30px rgba(41,128,254,.28);
  border: 1px solid var(--primary);
  cursor: pointer;
}
.download-btn:hover { transform: translateY(-1px); box-shadow: 0 18px 38px rgba(41,128,254,.32); }
.safe-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.safe-tags span { font-size: 13px; color: #31506f; background: #fff; border: 1px solid var(--line); padding: 7px 11px; border-radius: 999px; }
.app-visual { position: relative; min-height: 370px; display: grid; place-items: center; }
.visual-glow { position: absolute; width: 82%; height: 72%; border-radius: 42px; background: linear-gradient(135deg, rgba(41,128,254,.13), rgba(244,248,255,.8)); filter: blur(.2px); }
.phone-frame { position: relative; z-index: 2; width: min(330px, 82vw); padding: 14px; border-radius: 36px; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--line); }
.phone-frame img { border-radius: 26px; width: 100%; object-fit: cover; }
.floating-card {
  position: relative;
  z-index: 3;
  width: 100%;
  margin-top: 12px;
  background: rgba(255,255,255,.96);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 13px 14px;
  box-shadow: var(--shadow-soft);
}
.floating-card strong { display: block; color: var(--deep); font-size: 14px; }
.floating-card span { color: var(--muted); font-size: 12px; }
.visual-cards { display: grid; gap: 10px; width: 100%; }

.ability-bar { display: grid; gap: 12px; }
.ability-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px;
  box-shadow: 0 10px 28px rgba(15,23,42,.04);
}
.ability-item b { display: block; color: var(--primary); margin-bottom: 4px; }
.ability-item span { color: var(--muted); font-size: 14px; }

.section-head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; max-width: 760px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; align-items: center; }
.feature-showcase, .ecosystem-grid, .risk-grid, .faq-grid { display: grid; gap: 18px; }
.feature-card, .eco-card, .risk-card, .faq-item, .info-card, .step-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, .05);
}
.feature-card { display: grid; gap: 18px; overflow: hidden; }
.feature-card img { border-radius: 20px; background: var(--primary-lighter); border: 1px solid var(--line); }
.card-link, .text-link { color: var(--primary); font-weight: 800; display: inline-flex; margin-top: 10px; }
.card-link:after, .text-link:after { content: " →"; }

.product-section, .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel {
  display: grid;
  gap: 26px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: 24px;
  box-shadow: var(--shadow-soft);
}
.cold-wallet-panel { background: linear-gradient(135deg, #f7fbff, #eef6ff); }
.panel-image { border-radius: 26px; border: 1px solid var(--line); background: var(--primary-lighter); box-shadow: 0 15px 38px rgba(41,128,254,.11); }
.panel-copy { display: grid; gap: 14px; }
.check-list { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 10px; }
.check-list li { position: relative; padding-left: 28px; color: #405166; }
.check-list li:before { content: ""; position: absolute; left: 0; top: 8px; width: 14px; height: 14px; border-radius: 50%; background: var(--primary); box-shadow: inset 0 0 0 4px #dbeafe; }
.mini-panel-grid { display: grid; gap: 12px; margin-top: 14px; }
.mini-panel { border: 1px solid var(--line); background: #fff; border-radius: 18px; padding: 16px; }
.mini-panel b { color: var(--deep); display: block; }
.mini-panel span { color: var(--muted); font-size: 14px; }

.process-steps { display: grid; gap: 14px; counter-reset: step; }
.step-card { position: relative; padding-left: 72px; min-height: 110px; }
.step-card:before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 22px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  font-size: 13px;
}
.risk-card { border-top: 4px solid var(--primary); }
.risk-card b { display: block; color: var(--deep); margin-bottom: 8px; }
.risk-card small { display: block; margin-top: 10px; color: var(--primary); font-weight: 800; }
.eco-card { min-height: 170px; display: flex; flex-direction: column; justify-content: space-between; }
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.cta-section { text-align: center; }
.cta-box {
  background: linear-gradient(135deg, #eef6ff, #ffffff);
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 34px 20px;
  box-shadow: var(--shadow-soft);
}
.cta-box p { max-width: 720px; margin: 12px auto 22px; }

.page-hero { padding-bottom: 30px; }
.page-hero-card {
  background: linear-gradient(135deg, #fff, #f2f7ff);
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 28px;
  box-shadow: var(--shadow-soft);
}
.page-hero-card p { margin-top: 14px; max-width: 820px; }
.content-layout { max-width: 1180px; margin: 0 auto; padding: 22px 18px 68px; display: grid; gap: 20px; }
.article-card { background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: 0 12px 34px rgba(15,23,42,.05); }
.article-card h2 { font-size: 28px; margin-bottom: 14px; }
.article-card p + p { margin-top: 14px; }
.side-stack { display: grid; gap: 16px; align-content: start; }
.info-card h3, .step-card h3 { margin-bottom: 8px; }
.notice-box {
  border: 1px solid #d7e8ff;
  background: var(--primary-lighter);
  border-radius: 22px;
  padding: 18px;
  margin-top: 18px;
}
.notice-box b { color: var(--primary); }
.list-grid { display: grid; gap: 12px; margin-top: 18px; }
.list-item { padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #fbfdff; }
.list-item b { color: var(--deep); display: block; }
.list-item span { color: var(--muted); font-size: 14px; }
.download-row { margin-top: 24px; }

.download-page-grid { display: grid; gap: 20px; }
.download-card { background: #fff; border: 1px solid var(--line); border-radius: 28px; padding: 24px; box-shadow: var(--shadow-soft); }
.download-card .download-btn { margin-top: 18px; }
.number-list { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 12px; }
.number-list li { padding: 14px 16px; border-radius: 17px; border: 1px solid var(--line); background: #fbfdff; color: #405166; }
.number-list b { color: var(--primary); margin-right: 8px; }

.site-footer { border-top: 1px solid var(--line); background: #fff; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 34px 18px; display: grid; gap: 22px; }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-logo { width: 42px; height: 42px; object-fit: contain; border-radius: 12px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px; }
.footer-links a { color: var(--muted); background: var(--soft); border: 1px solid var(--line); padding: 8px 12px; border-radius: 999px; font-size: 14px; }
.footer-note { font-size: 13px; }

@media (min-width: 640px) {
  .ability-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-showcase, .ecosystem-grid, .risk-grid, .faq-grid, .mini-panel-grid, .download-page-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav { position: static; display: flex; flex-direction: row; align-items: center; width: auto; padding: 0; border: none; box-shadow: none; background: transparent; }
  .site-nav a { padding: 8px 10px; font-size: 14px; }
  .app-hero { grid-template-columns: 1.02fr .98fr; align-items: center; padding-top: 86px; }
  .visual-cards { position: absolute; inset: 0; display: block; }
  .floating-card { position: absolute; width: 190px; margin: 0; }
  .floating-card.card-one { left: 0; top: 46px; }
  .floating-card.card-two { right: 2px; top: 34px; }
  .floating-card.card-three { left: 20px; bottom: 38px; }
  .floating-card.card-four { right: 0; bottom: 54px; }
  .ability-bar { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .feature-showcase { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { grid-template-columns: 1fr 170px; align-items: center; }
  .wallet-panel, .cold-wallet-panel, .swap-panel, .dapp-panel, .product-section { grid-template-columns: 1fr 1fr; padding: 34px; }
  .cold-wallet-panel .panel-image, .dapp-panel .panel-image { order: -1; }
  .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ecosystem-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .content-layout { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
  .article-card { padding: 34px; }
  .page-hero-card { padding: 42px; }
}

@media (min-width: 1120px) {
  .site-nav a { padding: 9px 13px; }
  .feature-card img { max-height: 230px; object-fit: cover; }
}