* {
  box-sizing: border-box;
}

:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-faint: #F5FAFF;
  --white: #FFFFFF;
  --gray-50: #F8FAFC;
  --gray-100: #EEF2F7;
  --gray-200: #E3E8EF;
  --gray-500: #64748B;
  --gray-700: #334155;
  --gray-900: #111827;
  --radius-lg: 26px;
  --radius-md: 18px;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --line: 1px solid var(--gray-200);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--gray-700);
  background: linear-gradient(180deg, #F7FBFF 0%, #FFFFFF 20%, #F8FAFC 100%);
  line-height: 1.72;
  overflow-x: hidden;
}

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

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--primary);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 10px;
  z-index: 200;
}

.skip-link:focus {
  left: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: var(--line);
}

.nav-wrap {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: 0.02em;
}

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

.brand-text {
  font-size: 20px;
}

.nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-label {
  color: var(--primary);
  border: 1px solid rgba(41, 128, 254, 0.22);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
}

.site-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 74px;
  display: none;
  grid-template-columns: 1fr;
  gap: 8px;
  background: var(--white);
  border: var(--line);
  border-radius: 22px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.nav-toggle:checked ~ .site-nav {
  display: grid;
}

.site-nav a {
  padding: 10px 12px;
  color: var(--gray-700);
  border-radius: 14px;
  font-size: 15px;
  font-weight: 650;
}

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

.container,
.section,
.page-shell {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
}

.section {
  padding: 44px 0;
}

.kicker,
.category-badge,
.index-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41, 128, 254, 0.14);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 750;
}

h1,
h2,
h3 {
  color: var(--gray-900);
  line-height: 1.18;
  margin: 0 0 14px;
}

h1 {
  font-size: clamp(34px, 9vw, 64px);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(26px, 6vw, 40px);
  letter-spacing: -0.03em;
}

h3 {
  font-size: 20px;
}

p {
  margin: 0 0 14px;
}

.lead {
  color: var(--gray-500);
  font-size: clamp(16px, 4vw, 19px);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(41, 128, 254, 0.26);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(41, 128, 254, 0.31);
}

.text-link,
.card-link {
  color: var(--primary);
  font-weight: 750;
}

.web3-dashboard-hero {
  position: relative;
  width: min(1180px, calc(100% - 28px));
  margin: 28px auto 0;
  padding: 28px;
  border: var(--line);
  border-radius: 30px;
  background:
    radial-gradient(circle at 88% 8%, rgba(41, 128, 254, 0.18), transparent 28%),
    linear-gradient(135deg, #FFFFFF 0%, #F4F9FF 100%);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

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

.hero-copy .lead {
  max-width: 640px;
  margin-bottom: 22px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin: 18px 0 22px;
}

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

.security-tags span {
  color: var(--gray-700);
  background: var(--white);
  border: var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 700;
}

.hero-console {
  position: relative;
  min-height: 520px;
  background: rgba(255, 255, 255, 0.7);
  border: var(--line);
  border-radius: 28px;
  padding: 16px;
}

.hero-device {
  max-width: 320px;
  margin: 0 auto;
  filter: drop-shadow(0 26px 40px rgba(41, 128, 254, 0.14));
}

.status-card {
  background: var(--white);
  border: var(--line);
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.status-card strong {
  display: block;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.status-card span {
  display: block;
  color: var(--gray-500);
  font-size: 13px;
}

.status-stack {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.service-index {
  display: grid;
  gap: 14px;
}

.service-card {
  background: var(--white);
  border: var(--line);
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.05);
}

.service-card h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.service-card h3::after {
  content: "";
  width: 28px;
  height: 4px;
  border-radius: 999px;
  background: var(--primary);
}

.feature-section {
  padding: 34px;
  margin: 22px auto;
  border-radius: 30px;
  border: var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

.feature-grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.feature-visual {
  background: linear-gradient(145deg, #F8FAFC, #EAF3FF);
  border: var(--line);
  border-radius: 26px;
  padding: 18px;
  min-height: 260px;
  display: grid;
  place-items: center;
}

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

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

.feature-list li,
.check-list li,
.clean-list li {
  padding-left: 26px;
  position: relative;
}

.feature-list li::before,
.check-list li::before,
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--primary);
}

.digital-assets-hub {
  background:
    radial-gradient(circle at 12% 20%, rgba(41, 128, 254, 0.12), transparent 24%),
    var(--white);
}

.web3-ecosystem-section {
  background: linear-gradient(135deg, #FFFFFF, #F5FAFF);
}

.hardware-wallet-section {
  background: linear-gradient(135deg, #F8FAFC, #EEF6FF);
}

.swap-service-section {
  background: var(--white);
}

.privacy-boundary-section,
.submit-chain-section,
.developer-center-section {
  border-radius: 30px;
  padding: 34px;
  margin: 22px auto;
  border: var(--line);
}

.privacy-boundary-section {
  background: linear-gradient(135deg, #FFFFFF, #F6FAFF);
}

.submit-chain-section {
  background: linear-gradient(135deg, #F7FBFF, #FFFFFF);
}

.developer-center-section {
  background: #F8FAFC;
}

.boundary-grid,
.eco-grid,
.dev-grid {
  display: grid;
  gap: 18px;
}

.safety-panel,
.eco-panel,
.code-panel,
.article-card,
.side-panel,
.faq-item,
.risk-card,
.step-card {
  background: var(--white);
  border: var(--line);
  border-radius: 22px;
  padding: 20px;
}

.safety-panel {
  border-left: 5px solid var(--primary);
}

.code-panel {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  color: #26364F;
  background: linear-gradient(180deg, #FFFFFF, #F4F8FF);
}

.code-panel .line {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid #E7EDF6;
}

.code-panel .line:last-child {
  border-bottom: 0;
}

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

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

.step-number {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
  margin-bottom: 12px;
}

.risk-grid,
.faq-grid,
.page-grid,
.category-grid {
  display: grid;
  gap: 14px;
}

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

.risk-card .risk-tag {
  display: inline-flex;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 8px;
}

.cta-section {
  text-align: center;
  margin: 32px auto 54px;
  padding: 38px 22px;
  border-radius: 30px;
  border: var(--line);
  background: linear-gradient(135deg, #FFFFFF 0%, #EAF3FF 100%);
  box-shadow: var(--shadow);
}

.cta-section p {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gray-500);
}

.page-shell {
  padding: 30px 0 54px;
}

.page-hero {
  background:
    radial-gradient(circle at 86% 4%, rgba(41, 128, 254, 0.16), transparent 26%),
    var(--white);
  border: var(--line);
  border-radius: 30px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.page-hero.compact h1 {
  max-width: 780px;
}

.page-hero .lead {
  max-width: 760px;
  margin-bottom: 20px;
}

.page-layout {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.article-card p + h2 {
  margin-top: 28px;
}

.info-strip {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.info-card {
  background: #F8FAFC;
  border: var(--line);
  border-radius: 20px;
  padding: 18px;
}

.related-strip {
  margin-top: 20px;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.related-strip a {
  background: var(--white);
  border: var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  color: var(--primary);
  font-weight: 750;
}

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

.download-page-steps li {
  list-style: none;
  counter-increment: steps;
  padding: 18px;
  background: var(--white);
  border: var(--line);
  border-radius: 20px;
}

.download-page-steps li::before {
  content: counter(steps);
  display: inline-flex;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  background: var(--primary);
  color: var(--white);
  font-weight: 800;
}

.faq-item summary {
  cursor: pointer;
  color: var(--gray-900);
  font-weight: 800;
  font-size: 18px;
}

.faq-item p {
  margin-top: 12px;
  color: var(--gray-500);
}

.site-footer {
  background: #FFFFFF;
  border-top: var(--line);
}

.footer-inner {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  gap: 24px;
}

.footer-inner p {
  max-width: 680px;
  color: var(--gray-500);
  margin-top: 14px;
}

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

.footer-links a {
  color: var(--gray-700);
  font-weight: 650;
}

.footer-bottom {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  border-top: var(--line);
  padding: 16px 0 28px;
  display: grid;
  gap: 8px;
  color: var(--gray-500);
  font-size: 14px;
}

@media (min-width: 720px) {
  .service-index,
  .risk-grid,
  .faq-grid,
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-inner {
    grid-template-columns: 1.6fr 1fr;
  }
}

@media (min-width: 980px) {
  .nav-toggle-label {
    display: none;
  }

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

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

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) 470px;
    align-items: center;
  }

  .hero-console {
    min-height: 560px;
  }

  .status-stack {
    position: absolute;
    inset: auto 20px 20px 20px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .status-card:first-child {
    grid-column: span 2;
  }

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

  .service-card:nth-child(1),
  .service-card:nth-child(3) {
    grid-column: span 2;
  }

  .feature-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .feature-grid.reverse .feature-visual {
    order: -1;
  }

  .boundary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .eco-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .dev-grid {
    grid-template-columns: 0.9fr 1.1fr;
  }

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

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

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
  }

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

@media (min-width: 1180px) {
  .site-nav a {
    padding: 9px 12px;
  }
}

@media (max-width: 420px) {
  .web3-dashboard-hero,
  .feature-section,
  .privacy-boundary-section,
  .submit-chain-section,
  .developer-center-section,
  .page-hero {
    padding: 22px;
    border-radius: 24px;
  }

  .download-btn {
    width: 100%;
  }

  .hero-actions {
    width: 100%;
  }

  .brand-text {
    font-size: 18px;
  }
}