:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-lighter: #F4F8FF;
  --white: #ffffff;
  --bg: #F7FAFF;
  --surface: #ffffff;
  --surface-alt: #F1F6FF;
  --line: #E3EAF4;
  --text: #1E2A3A;
  --muted: #64748B;
  --soft: #F5F7FA;
  --shadow: 0 18px 50px rgba(24, 58, 109, .08);
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 16px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 44%, #ffffff 100%);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid rgba(226,232,240,.85);
  backdrop-filter: blur(18px);
}

.header-inner {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text);
  white-space: nowrap;
}

.logo,
.footer-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 12px;
}

.nav-toggle {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
}

.site-nav {
  position: absolute;
  top: 70px;
  left: 16px;
  right: 16px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--shadow);
}

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

.site-nav a {
  padding: 10px 12px;
  border-radius: 999px;
  color: #4b5b70;
  font-size: 14px;
  font-weight: 700;
}

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

.content-container,
.section,
.launch-hero,
.cta-section,
.page-hero,
.content-layout,
.faq-section {
  width: min(var(--container), calc(100% - 32px));
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding: 44px 0;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.section-label,
.category-badge,
.mini-badge,
.risk-label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  padding: 6px 12px;
}

.section-head h2,
.feature-copy h2,
.cta-section h2,
.page-hero h1,
.faq-section h1,
.content-card h2 {
  margin: 0;
  color: var(--text);
  line-height: 1.18;
}

.section-head h2,
.feature-copy h2,
.cta-section h2,
.content-card h2 {
  font-size: clamp(26px, 4.8vw, 44px);
}

.launch-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 48px 0 36px;
}

.launch-hero::before {
  content: "";
  position: absolute;
  inset: 10px -18px auto auto;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(41,128,254,.24), rgba(41,128,254,0) 70%);
  pointer-events: none;
}

.hero-copy,
.hero-visual,
.big-feature-card,
.highlight-card,
.category-card,
.risk-card,
.step-card,
.info-panel,
.content-card,
.side-panel,
.faq-item,
.about-panel,
.download-panel {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.92);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ffffff 0%, #f4f8ff 100%);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: #fff;
  border: 1px solid #d8e8ff;
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 800;
  margin-bottom: 16px;
}

.launch-hero h1 {
  margin: 0;
  font-size: clamp(36px, 10vw, 68px);
  line-height: 1.05;
  letter-spacing: -.05em;
}

.hero-copy p {
  margin-top: 18px;
  font-size: 17px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 24px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  letter-spacing: .02em;
  box-shadow: 0 14px 32px rgba(41,128,254,.22);
  border: 0;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(41,128,254,.28);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.hero-tags,
.float-tags,
.check-list,
.related-links,
.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-tags {
  margin-top: 22px;
}

.hero-tags span,
.float-tags span,
.check-list li,
.related-links a,
.inline-links a,
.pill {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 750;
  color: #526277;
}

.inline-links a,
.related-links a {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: #d6e8ff;
}

.hero-visual {
  position: relative;
  min-height: 460px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: radial-gradient(circle at 50% 30%, #dcebff, #ffffff 58%);
  display: grid;
  place-items: center;
  padding: 26px;
}

.app-showcase {
  position: relative;
  width: min(78vw, 360px);
  margin: auto;
}

.app-showcase img {
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  filter: drop-shadow(0 26px 48px rgba(31,68,122,.18));
}

.float-tags span {
  position: absolute;
  background: rgba(255,255,255,.94);
  box-shadow: 0 12px 28px rgba(24,58,109,.1);
}

.tag-asset { top: 36px; left: 18px; }
.tag-cold { top: 90px; right: 18px; }
.tag-swap { bottom: 96px; left: 20px; }
.tag-dapp { bottom: 34px; right: 18px; }

.highlight-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.highlight-card {
  border-radius: 22px;
  padding: 18px;
  min-height: 150px;
  transition: transform .2s ease, border-color .2s ease;
}

.highlight-card:hover,
.category-card:hover {
  transform: translateY(-3px);
  border-color: #bad9ff;
}

.highlight-card strong,
.category-card strong,
.risk-card strong,
.step-card strong {
  display: block;
  margin: 8px 0 6px;
  font-size: 18px;
  color: var(--text);
}

.card-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--primary);
  font-weight: 850;
}

.big-feature-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  border-radius: var(--radius-lg);
  padding: 22px;
  margin: 26px 0;
  overflow: hidden;
}

.big-feature-card.gradient-bg {
  background: linear-gradient(135deg, #ffffff 0%, #f1f7ff 100%);
}

.big-feature-card.alt-bg {
  background: linear-gradient(135deg, #f7faff 0%, #ffffff 100%);
}

.feature-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-media {
  min-height: 280px;
  border-radius: 26px;
  background: linear-gradient(160deg, #edf5ff, #ffffff);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  padding: 22px;
}

.feature-media img {
  max-height: 360px;
  object-fit: contain;
  filter: drop-shadow(0 22px 42px rgba(31,68,122,.14));
}

.feature-list {
  display: grid;
  gap: 10px;
}

.feature-list li {
  position: relative;
  padding-left: 22px;
  color: #445266;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--primary);
}

.process-steps,
.risk-grid,
.app-category-center,
.page-grid,
.about-grid,
.download-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.step-card,
.risk-card,
.category-card,
.info-panel,
.download-panel,
.about-panel {
  border-radius: var(--radius-md);
  padding: 20px;
}

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

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

.risk-card em {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: #334155;
  font-weight: 780;
}

.category-card {
  min-height: 172px;
  border-radius: 26px;
  padding: 20px;
}

.category-card:nth-child(4n+1) {
  background: linear-gradient(135deg, #fff, #f4f8ff);
}

.category-card:nth-child(4n+2) {
  background: linear-gradient(135deg, #fff, #f7fafc);
}

.cta-section {
  margin-top: 40px;
  margin-bottom: 52px;
  padding: 36px 24px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at top, rgba(41,128,254,.16), rgba(247,250,255,.96) 48%, #fff 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.cta-section p {
  max-width: 720px;
  margin: 12px auto 22px;
}

.page-hero {
  padding: 42px 0 22px;
}

.page-hero-inner {
  border-radius: var(--radius-lg);
  padding: 28px;
  background: linear-gradient(135deg, #ffffff 0%, #f2f7ff 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-hero h1,
.faq-section h1 {
  margin-top: 14px;
  font-size: clamp(34px, 8vw, 58px);
  letter-spacing: -.04em;
}

.page-hero p {
  margin-top: 14px;
  max-width: 780px;
  font-size: 17px;
}

.page-hero .download-btn {
  margin-top: 22px;
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 22px 0 52px;
}

.content-card,
.side-panel {
  border-radius: var(--radius-lg);
  padding: 24px;
}

.content-card p + p,
.about-panel p + p {
  margin-top: 14px;
}

.content-card h2,
.content-card h3 {
  margin-top: 0;
}

.content-card h3,
.side-panel h3,
.info-panel h3 {
  color: var(--text);
  font-size: 22px;
  line-height: 1.25;
}

.note-box,
.safety-panel {
  border-radius: 22px;
  background: var(--primary-lighter);
  border: 1px solid #dcecff;
  padding: 18px;
  margin: 18px 0;
}

.note-box strong,
.safety-panel strong {
  display: block;
  color: var(--text);
  margin-bottom: 8px;
}

.check-list {
  margin-top: 16px;
}

.check-list li {
  border-radius: 16px;
  width: 100%;
}

.side-panel {
  align-self: start;
  background: #fff;
}

.side-panel ul {
  display: grid;
  gap: 10px;
}

.side-panel li {
  padding: 12px;
  border-radius: 16px;
  background: var(--soft);
  color: #46566c;
}

.faq-section {
  padding: 44px 0 54px;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.faq-item {
  border-radius: 22px;
  padding: 20px;
}

.faq-item h2,
.faq-item h3 {
  margin: 0 0 8px;
  font-size: 20px;
  color: var(--text);
}

.download-panel {
  background: linear-gradient(135deg, #fff, #f4f8ff);
}

.download-panel .download-btn {
  margin-top: 18px;
}

.about-grid {
  margin-top: 22px;
}

.about-panel {
  border-radius: var(--radius-md);
  padding: 22px;
}

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

.footer-inner {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  gap: 22px;
}

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

.footer-brand strong {
  display: block;
  margin-bottom: 4px;
}

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

.footer-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: #4d5f75;
  background: #fff;
}

@media (min-width: 560px) {
  .highlight-bar,
  .risk-grid,
  .app-category-center,
  .page-grid,
  .download-steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 840px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    width: auto;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

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

  .launch-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
    align-items: stretch;
    padding-top: 70px;
  }

  .hero-copy {
    padding: 44px;
  }

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

  .big-feature-card {
    grid-template-columns: 1fr 1fr;
    padding: 34px;
  }

  .big-feature-card.reverse .feature-media {
    order: -1;
  }

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

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

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

  .content-layout {
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 24px;
  }

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

  .footer-inner {
    grid-template-columns: 1.1fr .9fr;
    align-items: center;
  }

  .footer-links {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .site-nav a {
    padding: 8px 12px;
  }

  .process-steps {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (max-width: 390px) {
  .content-container,
  .section,
  .launch-hero,
  .cta-section,
  .page-hero,
  .content-layout,
  .faq-section {
    width: min(100% - 24px, var(--container));
  }

  .hero-copy,
  .page-hero-inner,
  .content-card,
  .side-panel {
    padding: 20px;
  }

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