:root {
  --primary: #2980FE;
  --primary-dark: #1764d8;
  --primary-soft: #eaf3ff;
  --primary-wash: #f3f8ff;
  --white: #ffffff;
  --ink: #182033;
  --text: #374151;
  --muted: #6b7280;
  --line: #e5e7eb;
  --soft: #f6f8fb;
  --soft-2: #f8fbff;
  --shadow: 0 18px 48px rgba(22, 51, 92, .08);
  --radius: 28px;
}

* {
  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, #ffffff 0%, #f8fbff 46%, #ffffff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}

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

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

p {
  margin: 0 0 16px;
}

h1, h2, h3 {
  margin: 0 0 16px;
  color: var(--ink);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(34px, 7vw, 64px);
}

h2 {
  font-size: clamp(28px, 4.8vw, 44px);
}

h3 {
  font-size: 21px;
}

ul, ol {
  padding-left: 20px;
  margin: 0;
}

li + li {
  margin-top: 8px;
}

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

.narrow-container {
  width: min(100% - 32px, 900px);
  margin: 0 auto;
}

.section {
  padding: 64px 0;
}

.section-soft {
  background: var(--soft-2);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229, 231, 235, .78);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--ink);
  white-space: nowrap;
}

.logo img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
}

.main-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 76px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
  box-shadow: var(--shadow);
}

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

.main-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
}

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

.nav-toggle {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  cursor: pointer;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 99px;
}

.web3-hero {
  position: relative;
  padding: 56px 0 72px;
  overflow: hidden;
}

.web3-hero::before,
.gradient-orb {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(41, 128, 254, .20), rgba(41, 128, 254, 0) 68%);
  right: -130px;
  top: -120px;
  pointer-events: none;
}

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

.eyebrow,
.category-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  gap: 8px;
  padding: 7px 12px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41, 128, 254, .16);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .02em;
}

.hero-copy p {
  font-size: 17px;
  color: var(--muted);
}

.download-btn {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
  box-shadow: 0 16px 30px 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 20px 38px rgba(41, 128, 254, .30);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 26px 0 22px;
}

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

.security-tags span,
.tag-row span,
.mini-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .82);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
  padding: 22px;
  border-radius: 36px;
  background:
    linear-gradient(135deg, rgba(41, 128, 254, .10), rgba(255, 255, 255, .92)),
    repeating-linear-gradient(135deg, rgba(41, 128, 254, .08) 0 1px, transparent 1px 18px);
  border: 1px solid rgba(41, 128, 254, .12);
  box-shadow: var(--shadow);
}

.hero-visual img {
  max-height: 430px;
  object-fit: contain;
  filter: drop-shadow(0 22px 38px rgba(24, 32, 51, .15));
}

.float-label {
  position: absolute;
  padding: 9px 12px;
  border: 1px solid rgba(41, 128, 254, .18);
  border-radius: 999px;
  background: rgba(255, 255, 255, .88);
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(22, 51, 92, .10);
}

.float-label.one { top: 22px; left: 18px; }
.float-label.two { top: 76px; right: 16px; }
.float-label.three { bottom: 82px; left: 18px; }
.float-label.four { bottom: 22px; right: 24px; }

.ecosystem-nav {
  padding-top: 0;
}

.section-heading {
  margin-bottom: 28px;
}

.section-heading p {
  color: var(--muted);
  max-width: 760px;
}

.ecosystem-grid,
.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.ecosystem-card,
.info-card,
.risk-card,
.faq-item,
.step-card,
.related-card,
.check-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(22, 51, 92, .05);
}

.ecosystem-card {
  padding: 22px;
  display: grid;
  gap: 10px;
  min-height: 170px;
}

.ecosystem-card span {
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 800;
  font-size: 12px;
}

.ecosystem-card p,
.info-card p,
.risk-card p,
.faq-item p,
.step-card p,
.related-card p,
.check-card p {
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 800;
}

.text-link::after {
  content: "→";
  transition: transform .2s ease;
}

.text-link:hover::after {
  transform: translateX(3px);
}

.split-section,
.web3-section,
.hardware-wallet-section,
.digital-assets-section,
.swap-section,
.privacy-section,
.submit-chain-section,
.developer-center-section {
  display: grid;
  gap: 26px;
  align-items: center;
}

.feature-panel {
  padding: 28px;
  border-radius: 36px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.feature-panel.blue {
  background: linear-gradient(135deg, #eef6ff, #ffffff);
  border-color: rgba(41, 128, 254, .15);
}

.feature-media {
  padding: 22px;
  min-height: 280px;
  display: grid;
  place-items: center;
  border-radius: 34px;
  background: linear-gradient(135deg, #f3f8ff, #ffffff);
  border: 1px solid rgba(41, 128, 254, .13);
}

.feature-media img {
  max-height: 370px;
  object-fit: contain;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 22px 0;
}

.feature-list .item {
  padding: 14px 16px;
  border-left: 4px solid var(--primary);
  border-radius: 16px;
  background: var(--soft-2);
}

.safety-panel {
  padding: 24px;
  border-radius: 30px;
  background: linear-gradient(135deg, #f8fbff, #ffffff);
  border: 1px solid var(--line);
}

.safety-panel strong {
  color: var(--ink);
}

.code-panel {
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid #d8e7ff;
  background: #fbfdff;
  box-shadow: var(--shadow);
}

.code-panel .bar {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid #d8e7ff;
  background: #f1f7ff;
}

.code-panel .bar span {
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: var(--primary);
  opacity: .35;
}

.code-panel pre {
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  color: #1f3357;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.7;
}

.process-steps {
  display: grid;
  gap: 16px;
  counter-reset: steps;
}

.step-card {
  position: relative;
  padding: 22px;
}

.step-card .num {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 12px;
  border-radius: 14px;
  background: var(--primary);
  color: var(--white);
  font-weight: 900;
}

.risk-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

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

.risk-card .risk-name {
  color: var(--ink);
  font-weight: 900;
  margin-bottom: 8px;
}

.risk-card strong {
  display: block;
  color: var(--text);
  margin-top: 10px;
}

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

.faq-item {
  padding: 20px;
}

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

.cta-section {
  text-align: center;
  padding: 72px 0;
  background:
    radial-gradient(circle at top left, rgba(41, 128, 254, .16), transparent 36%),
    linear-gradient(135deg, #f3f8ff, #ffffff);
}

.cta-box {
  width: min(100% - 32px, 900px);
  margin: 0 auto;
  padding: 34px 22px;
  border-radius: 36px;
  border: 1px solid rgba(41, 128, 254, .16);
  background: rgba(255, 255, 255, .78);
  box-shadow: var(--shadow);
}

.page-hero {
  padding: 56px 0 32px;
}

.page-hero-card {
  position: relative;
  overflow: hidden;
  padding: 32px;
  border-radius: 36px;
  background:
    radial-gradient(circle at right top, rgba(41, 128, 254, .18), transparent 40%),
    linear-gradient(135deg, #ffffff, #f4f8ff);
  border: 1px solid rgba(41, 128, 254, .14);
  box-shadow: var(--shadow);
}

.page-hero-card p {
  color: var(--muted);
  max-width: 780px;
}

.content-layout {
  display: grid;
  gap: 24px;
  align-items: start;
}

.article-card {
  padding: 26px;
  border-radius: 30px;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 12px 30px rgba(22, 51, 92, .05);
}

.article-card + .article-card {
  margin-top: 18px;
}

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

.related-card,
.check-card {
  padding: 18px;
}

.related-card a {
  display: block;
  color: var(--primary);
  font-weight: 800;
  margin-top: 8px;
}

.check-list {
  display: grid;
  gap: 12px;
}

.check-list li {
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--soft-2);
  border: 1px solid var(--line);
}

.download-steps {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.download-step {
  display: flex;
  gap: 14px;
  padding: 18px;
  border-radius: 22px;
  background: var(--white);
  border: 1px solid var(--line);
}

.download-step span {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  border-radius: 13px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 900;
}

.site-footer {
  background: #f6f8fb;
  border-top: 1px solid var(--line);
  padding-top: 48px;
}

.footer-grid {
  display: grid;
  gap: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--ink);
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

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

.site-footer a {
  display: block;
  color: var(--muted);
  margin: 7px 0;
}

.site-footer a:hover {
  color: var(--primary);
}

.footer-bottom {
  margin-top: 34px;
  padding: 18px;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

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

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

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

@media (min-width: 920px) {
  .section {
    padding: 88px 0;
  }

  .nav-toggle {
    display: none;
  }

  .main-nav {
    position: static;
    display: flex !important;
    flex-direction: row;
    align-items: center;
    gap: 3px;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

  .main-nav a {
    padding: 8px 10px;
    font-size: 14px;
  }

  .web3-hero {
    padding: 86px 0 92px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.03fr) minmax(420px, .97fr);
    gap: 46px;
  }

  .hero-copy p {
    font-size: 18px;
  }

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

  .ecosystem-card:nth-child(1),
  .ecosystem-card:nth-child(7) {
    grid-column: span 2;
  }

  .web3-section,
  .digital-assets-section,
  .submit-chain-section {
    grid-template-columns: 1.04fr .96fr;
  }

  .hardware-wallet-section,
  .swap-section,
  .developer-center-section {
    grid-template-columns: .96fr 1.04fr;
  }

  .privacy-section {
    grid-template-columns: .9fr 1.1fr;
  }

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

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

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

  .side-panel {
    position: sticky;
    top: 96px;
  }

  .footer-grid {
    grid-template-columns: 1.3fr .7fr .7fr;
  }
}

@media (min-width: 1160px) {
  .main-nav a {
    padding: 9px 12px;
    font-size: 15px;
  }
}

@media (max-width: 420px) {
  .container,
  .narrow-container,
  .header-inner {
    width: min(100% - 24px, 1180px);
  }

  .page-hero-card,
  .feature-panel {
    padding: 22px;
  }

  .hero-visual {
    min-height: 300px;
  }

  .float-label {
    font-size: 12px;
    padding: 7px 9px;
  }

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