* {
  box-sizing: border-box;
}

:root {
  --primary: #2980FE;
  --primary-dark: #1767db;
  --primary-soft: #eaf3ff;
  --bg: #f6f9fd;
  --bg-soft: #eef5ff;
  --white: #ffffff;
  --text: #1f2937;
  --muted: #65758b;
  --line: #e4eaf2;
  --dark: #263241;
  --shadow: 0 18px 50px rgba(41, 128, 254, 0.10);
  --shadow-card: 0 12px 32px rgba(31, 41, 55, 0.07);
  --radius: 24px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  margin: 0;
  padding-left: 22px;
  color: var(--muted);
}

li {
  margin: 6px 0;
}

h1, h2, h3 {
  margin: 0;
  color: var(--dark);
  line-height: 1.2;
}

h1 {
  font-size: clamp(34px, 8vw, 66px);
  letter-spacing: -1.6px;
}

h2 {
  font-size: clamp(26px, 5vw, 42px);
  letter-spacing: -0.8px;
}

h3 {
  font-size: 20px;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(1180px, calc(100% - 28px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.4px;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 14px;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 10px;
  background: var(--dark);
}

.main-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 76px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
}

.main-nav.open {
  display: flex;
}

.main-nav a {
  padding: 11px 12px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
}

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

.gradient-bg {
  background:
    radial-gradient(circle at 16% 12%, rgba(41, 128, 254, 0.16), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f6f9fd 100%);
}

.portal-hero {
  padding: 44px 0 28px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  gap: 34px;
  align-items: center;
}

.eyebrow,
.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41, 128, 254, 0.15);
  font-size: 13px;
  font-weight: 800;
}

.hero-copy h1 {
  margin-top: 18px;
}

.hero-lead {
  margin-top: 18px;
  font-size: 18px;
  color: #526173;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 28px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
  border: 1px solid var(--primary);
  box-shadow: 0 12px 28px rgba(41, 128, 254, 0.24);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  background: var(--primary-dark);
  box-shadow: 0 16px 36px rgba(41, 128, 254, 0.28);
}

.text-link {
  color: var(--primary);
  font-weight: 800;
}

.security-tags,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.security-tags span,
.tag-row span {
  padding: 8px 12px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  padding: 24px;
  border-radius: 32px;
  background: linear-gradient(145deg, #ffffff, #edf5ff);
  box-shadow: var(--shadow);
  min-height: 360px;
}

.hero-phone {
  width: min(420px, 92%);
  margin: 0 auto;
  filter: drop-shadow(0 24px 38px rgba(41, 128, 254, 0.18));
}

.floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(228, 234, 242, 0.9);
  border-radius: 18px;
  padding: 13px 15px;
  box-shadow: var(--shadow-card);
  color: var(--dark);
  font-size: 13px;
  font-weight: 800;
}

.asset-status {
  left: 18px;
  bottom: 22px;
  max-width: 210px;
}

.asset-status small {
  display: block;
  color: var(--muted);
  font-weight: 650;
  margin-top: 4px;
}

.float-cold {
  top: 28px;
  left: 12px;
}

.float-swap {
  right: 10px;
  top: 44%;
}

.float-dapp {
  right: 18px;
  bottom: 34px;
}

.section {
  padding: 56px 0;
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}

.section-head.center {
  text-align: center;
  justify-items: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.channel-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.channel-card,
.feature-card,
.category-card,
.risk-card,
.faq-item,
.info-card,
.step-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-card);
}

.channel-card {
  padding: 20px;
  display: grid;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.channel-card::before {
  content: "";
  width: 38px;
  height: 4px;
  border-radius: 999px;
  background: var(--primary);
  position: absolute;
  top: 0;
  left: 20px;
}

.channel-card strong {
  color: var(--primary);
  font-size: 13px;
}

.channel-card h3 {
  margin-top: 6px;
}

.channel-card a,
.related-link,
.card-link {
  color: var(--primary);
  font-weight: 800;
}

.split-feature {
  display: grid;
  gap: 26px;
  align-items: center;
  padding: 28px;
  border-radius: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
}

.split-feature.soft {
  background: linear-gradient(145deg, #f8fbff, #edf5ff);
}

.split-feature + .split-feature {
  margin-top: 24px;
}

.feature-media {
  display: grid;
  place-items: center;
  min-height: 240px;
  border-radius: 24px;
  background:
    radial-gradient(circle at 28% 20%, rgba(41, 128, 254, 0.18), transparent 25%),
    linear-gradient(140deg, #f6f9fd, #ffffff);
  border: 1px solid var(--line);
  overflow: hidden;
}

.feature-media img {
  max-height: 360px;
  object-fit: contain;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 28px;
  color: var(--muted);
}

.feature-list li::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  left: 5px;
  top: 12px;
}

.wallet-section .feature-media {
  background: linear-gradient(145deg, #eff6ff, #ffffff);
}

.cold-wallet-section {
  background: #f2f7ff;
}

.swap-section .split-feature {
  background: linear-gradient(135deg, #ffffff, #f6faff);
}

.dapp-section .feature-media {
  background: linear-gradient(145deg, #edf5ff, #ffffff);
}

.dapp-reminder {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.dapp-reminder div {
  padding: 14px;
  border-radius: 16px;
  background: var(--primary-soft);
  color: #496076;
  border: 1px solid rgba(41, 128, 254, 0.13);
}

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

.step-card {
  padding: 20px;
  position: relative;
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  margin-bottom: 14px;
}

.risk-grid,
.category-grid,
.feature-grid {
  display: grid;
  gap: 16px;
}

.risk-card {
  padding: 20px;
  border-left: 4px solid var(--primary);
}

.risk-card b {
  color: var(--dark);
}

.risk-card span {
  display: block;
  color: var(--muted);
  margin-top: 8px;
}

.ecosystem-category {
  background: linear-gradient(180deg, #ffffff, #f6f9fd);
}

.category-card {
  padding: 22px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.category-card .badge {
  margin-bottom: 14px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 20px;
}

.faq-item h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.cta-section {
  margin: 26px auto 72px;
  padding: 44px 24px;
  text-align: center;
  border-radius: 32px;
  background:
    radial-gradient(circle at 20% 20%, rgba(41, 128, 254, 0.18), transparent 28%),
    linear-gradient(135deg, #ffffff, #eaf3ff);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

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

.page-hero {
  padding: 48px 0 30px;
  background:
    radial-gradient(circle at 15% 10%, rgba(41, 128, 254, 0.16), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, #f6f9fd 100%);
}

.page-hero .container {
  display: grid;
  gap: 16px;
}

.page-layout {
  display: grid;
  gap: 24px;
  align-items: start;
  padding: 42px 0 72px;
}

.article-panel,
.side-panel,
.download-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.article-panel h2 {
  margin: 26px 0 12px;
  font-size: clamp(23px, 4vw, 32px);
}

.article-panel h2:first-child {
  margin-top: 0;
}

.callout {
  padding: 18px;
  border-radius: 20px;
  background: var(--primary-soft);
  border: 1px solid rgba(41, 128, 254, 0.16);
  color: #476074;
  margin: 20px 0;
}

.check-grid {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}

.check-item {
  padding: 16px;
  border-radius: 18px;
  background: #f9fbfe;
  border: 1px solid var(--line);
}

.check-item strong {
  display: block;
  color: var(--dark);
  margin-bottom: 4px;
}

.side-panel {
  display: grid;
  gap: 14px;
}

.side-panel a {
  display: block;
  padding: 13px 14px;
  border-radius: 16px;
  background: #f8fbff;
  border: 1px solid var(--line);
  color: var(--primary);
  font-weight: 800;
}

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

.download-step {
  counter-increment: step;
  padding: 16px;
  border-radius: 18px;
  background: #f8fbff;
  border: 1px solid var(--line);
}

.download-step::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 11px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  margin-right: 8px;
}

.download-panel {
  text-align: center;
}

.download-panel .download-btn {
  margin-top: 12px;
}

.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--line);
  padding-top: 42px;
}

.footer-grid {
  display: grid;
  gap: 26px;
}

.footer-grid h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

.footer-grid a:not(.footer-brand) {
  display: block;
  color: var(--muted);
  margin: 8px 0;
}

.footer-brand img {
  width: 34px;
  height: 34px;
}

.footer-bottom {
  margin-top: 32px;
  border-top: 1px solid var(--line);
  padding: 18px 16px;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 14px;
}

@media (min-width: 600px) {
  .channel-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 920px) {
  .nav-toggle {
    display: none;
  }

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

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

  .portal-hero {
    padding: 76px 0 36px;
  }

  .hero-grid {
    grid-template-columns: 1.02fr 0.98fr;
    gap: 52px;
  }

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

  .split-feature {
    grid-template-columns: 1fr 1fr;
    padding: 42px;
    gap: 44px;
  }

  .split-feature.reverse .feature-media {
    order: -1;
  }

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

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

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

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

  .footer-grid {
    grid-template-columns: 1.2fr repeat(3, 1fr);
  }
}

@media (min-width: 1180px) {
  .main-nav a {
    padding: 10px 12px;
  }
}