* {
  box-sizing: border-box;
}

:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-softer: #F4F8FF;
  --text: #1F2937;
  --muted: #667085;
  --light: #F6F8FB;
  --line: #E5EAF2;
  --white: #FFFFFF;
  --deep: #0F172A;
  --shadow: 0 18px 50px rgba(41, 128, 254, 0.10);
  --soft-shadow: 0 12px 28px rgba(15, 23, 42, 0.07);
  --radius-lg: 28px;
  --radius-md: 20px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FBFF 42%, #FFFFFF 100%);
  line-height: 1.72;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229, 234, 242, 0.86);
}

.nav-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--deep);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  box-shadow: 0 10px 22px rgba(41, 128, 254, 0.16);
}

.site-nav {
  display: none;
  position: absolute;
  left: 16px;
  right: 16px;
  top: 72px;
  padding: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--soft-shadow);
}

.site-nav.open {
  display: grid;
  gap: 4px;
}

.site-nav a {
  color: #344054;
  font-size: 15px;
  padding: 11px 12px;
  border-radius: 12px;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--primary);
  background: var(--primary-soft);
}

.nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 14px;
  display: inline-grid;
  place-items: center;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--deep);
  border-radius: 999px;
  margin: 2px 0;
}

.container,
.content-container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow-container {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 64px 0;
}

.section-title {
  max-width: 760px;
  margin-bottom: 26px;
}

.eyebrow,
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.03em;
}

h1,
h2,
h3 {
  color: var(--deep);
  line-height: 1.18;
  margin: 0 0 14px;
}

h1 {
  font-size: clamp(34px, 9vw, 68px);
  letter-spacing: -0.055em;
}

h2 {
  font-size: clamp(26px, 5.6vw, 44px);
  letter-spacing: -0.035em;
}

h3 {
  font-size: 20px;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.lead {
  font-size: clamp(17px, 4.2vw, 20px);
  color: #475467;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
  border: 1px solid var(--primary);
  box-shadow: 0 12px 26px rgba(41, 128, 254, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(41, 128, 254, 0.30);
}

.link-arrow {
  display: inline-flex;
  margin-top: 4px;
  color: var(--primary);
  font-weight: 800;
}

.app-hero {
  padding: 52px 0 34px;
  position: relative;
  overflow: hidden;
}

.app-hero::before {
  content: "";
  position: absolute;
  inset: -160px -60px auto auto;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(41, 128, 254, 0.18), transparent 68%);
  pointer-events: none;
}

.hero-grid {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 36px;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin: 24px 0 18px;
}

.security-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.security-tags span {
  padding: 8px 12px;
  background: var(--white);
  color: #475467;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.app-visual {
  position: relative;
  min-height: 440px;
  display: grid;
  place-items: center;
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(41, 128, 254, 0.13), rgba(255, 255, 255, 0.62)),
    linear-gradient(180deg, #FFFFFF, #F3F7FF);
  border: 1px solid rgba(41, 128, 254, 0.14);
  box-shadow: var(--shadow);
  padding: 30px;
}

.app-visual .product-img {
  width: min(300px, 78%);
  filter: drop-shadow(0 24px 40px rgba(15, 23, 42, 0.14));
}

.floating-card {
  position: static;
  width: 100%;
  margin-top: 12px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--soft-shadow);
}

.floating-card strong {
  display: block;
  color: var(--deep);
  margin-bottom: 2px;
}

.floating-card small {
  color: var(--muted);
}

.ability-bar {
  width: min(1180px, calc(100% - 32px));
  margin: 16px auto 0;
  display: grid;
  gap: 12px;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 16px 44px rgba(15, 23, 42, 0.06);
}

.ability-item {
  padding: 16px;
  border-radius: 18px;
  background: #FBFCFF;
  border: 1px solid #EDF1F7;
}

.ability-item::before {
  content: "";
  width: 28px;
  height: 4px;
  display: block;
  border-radius: 999px;
  background: var(--primary);
  margin-bottom: 12px;
}

.ability-item h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.ability-item p {
  margin: 0;
  font-size: 14px;
}

.feature-showcase,
.ecosystem-grid,
.category-grid,
.risk-grid,
.faq-grid {
  display: grid;
  gap: 18px;
}

.feature-card,
.eco-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.content-card,
.tip-box,
.check-card,
.step-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.05);
}

.feature-card {
  overflow: hidden;
  padding: 20px;
  display: grid;
  gap: 18px;
}

.feature-card img {
  width: 100%;
  min-height: 190px;
  object-fit: contain;
  border-radius: 18px;
  background: var(--primary-softer);
  padding: 14px;
}

.product-section,
.wallet-panel,
.cold-wallet-panel,
.swap-panel,
.dapp-panel {
  display: grid;
  gap: 26px;
  align-items: center;
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

.cold-wallet-panel,
.dapp-panel {
  background: linear-gradient(135deg, #F3F8FF, #FFFFFF);
}

.swap-panel {
  background: linear-gradient(135deg, #FFFFFF, #F7FAFF);
}

.product-section img,
.wallet-panel img,
.cold-wallet-panel img,
.swap-panel img,
.dapp-panel img {
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  border-radius: 24px;
  background: #F7FAFF;
  padding: 18px;
}

.panel-list,
.clean-list,
.check-list {
  list-style: none;
  padding: 0;
  margin: 18px 0;
  display: grid;
  gap: 10px;
}

.panel-list li,
.clean-list li,
.check-list li {
  position: relative;
  padding-left: 26px;
  color: #475467;
}

.panel-list li::before,
.clean-list li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 0 4px rgba(41, 128, 254, 0.12);
}

.process-steps {
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.step-card {
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.step-card .num {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 12px;
  border-radius: 13px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.risk-card {
  padding: 18px;
  border-top: 4px solid var(--primary);
}

.risk-card strong,
.category-card strong,
.eco-card strong {
  display: block;
  color: var(--deep);
  margin-bottom: 8px;
  font-size: 17px;
}

.eco-card,
.category-card,
.faq-item,
.info-card,
.content-card,
.tip-box,
.check-card {
  padding: 18px;
}

.cta-section {
  text-align: center;
  padding: 52px 22px;
  border-radius: 34px;
  background: linear-gradient(135deg, #ECF5FF, #FFFFFF 62%, #F8FAFC);
  border: 1px solid rgba(41, 128, 254, 0.15);
  box-shadow: var(--shadow);
}

.cta-section p {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.page-hero {
  padding: 54px 0 28px;
}

.page-hero-card {
  padding: 30px;
  border-radius: 32px;
  background: linear-gradient(135deg, #FFFFFF, #F3F8FF);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-layout {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 22px;
  padding: 34px 0 70px;
}

.article-main {
  display: grid;
  gap: 18px;
}

.side-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}

.tip-box {
  background: #F7FAFF;
}

.tip-box h3,
.check-card h3,
.content-card h3 {
  margin-bottom: 8px;
}

.article-actions {
  margin-top: 8px;
}

.download-steps {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.download-steps .step-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #FFFFFF;
  padding: 34px 0 20px;
}

.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 24px;
}

.footer-brand {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.footer-brand img {
  width: 46px;
  height: 46px;
  border-radius: 15px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-links a {
  color: #475467;
  border: 1px solid var(--line);
  padding: 8px 12px;
  border-radius: 999px;
  background: #FBFCFF;
}

.footer-bottom {
  width: min(1180px, calc(100% - 32px));
  margin: 22px auto 0;
  color: #98A2B3;
  font-size: 13px;
}

.gradient-bg {
  background: linear-gradient(135deg, #F4F8FF, #FFFFFF);
}

.safety-panel {
  padding: 24px;
  border-radius: 28px;
  background: linear-gradient(135deg, #F8FBFF, #FFFFFF);
  border: 1px solid var(--line);
}

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

  .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .feature-showcase {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-section,
  .wallet-panel,
  .cold-wallet-panel,
  .swap-panel,
  .dapp-panel {
    grid-template-columns: 1.02fr 0.98fr;
    padding: 36px;
  }

  .cold-wallet-panel .panel-copy,
  .dapp-panel .panel-copy {
    order: 2;
  }

  .cold-wallet-panel .panel-visual,
  .dapp-panel .panel-visual {
    order: 1;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

  .site-nav a {
    padding: 9px 10px;
    font-size: 14px;
  }

  .hero-grid {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 54px;
  }

  .app-hero {
    padding: 82px 0 46px;
  }

  .app-visual {
    min-height: 560px;
  }

  .floating-card {
    position: absolute;
    width: 184px;
    margin: 0;
  }

  .floating-card.assets { left: 26px; top: 58px; }
  .floating-card.cold { right: 24px; top: 104px; }
  .floating-card.swap { left: 44px; bottom: 82px; }
  .floating-card.dapp { right: 38px; bottom: 48px; }

  .ability-bar {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .ecosystem-grid,
  .category-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .risk-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .process-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (max-width: 420px) {
  .container,
  .content-container,
  .narrow-container,
  .hero-grid,
  .ability-bar,
  .page-layout,
  .footer-inner,
  .footer-bottom {
    width: min(100% - 24px, 1180px);
  }

  .app-visual,
  .page-hero-card,
  .cta-section,
  .product-section,
  .wallet-panel,
  .cold-wallet-panel,
  .swap-panel,
  .dapp-panel {
    border-radius: 22px;
  }

  .download-btn {
    width: 100%;
  }
}