:root {
  --primary: #2980FE;
  --primary-soft: #EAF3FF;
  --primary-pale: #F5F9FF;
  --text: #1F2937;
  --deep: #111827;
  --muted: #64748B;
  --line: #E5EAF2;
  --soft: #F6F8FB;
  --card: #FFFFFF;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --shadow: 0 18px 55px rgba(31, 41, 55, .08);
  --shadow-blue: 0 18px 44px rgba(41, 128, 254, .14);
}

* { 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%, #F7FAFF 48%, #FFFFFF 100%);
  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); }
h1, h2, h3 { margin: 0 0 16px; color: var(--deep); line-height: 1.18; letter-spacing: -.02em; }
h1 { font-size: clamp(2.25rem, 8vw, 5.3rem); }
h2 { font-size: clamp(1.7rem, 4vw, 3rem); }
h3 { font-size: 1.16rem; }
ul, ol { color: var(--muted); padding-left: 20px; }
section { position: relative; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(229,234,242,.86);
}
.header-inner {
  width: min(1200px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  color: var(--deep);
  white-space: nowrap;
}
.logo img { width: 38px; height: 38px; object-fit: contain; }
.nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--deep);
  font-size: 20px;
}
.site-nav {
  display: none;
  position: absolute;
  top: 72px;
  left: 16px;
  right: 16px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
}
.site-nav.open { display: grid; gap: 8px; }
.site-nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: #4B5563;
  font-weight: 700;
  font-size: .95rem;
}
.site-nav a:hover, .site-nav a.active { color: var(--primary); background: var(--primary-soft); }

.content-container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}
.narrow-container {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
}
.gradient-background {
  background:
    radial-gradient(circle at 10% 12%, rgba(41,128,254,.16), transparent 32%),
    radial-gradient(circle at 84% 14%, rgba(41,128,254,.10), transparent 36%),
    linear-gradient(180deg, #FFFFFF, #F5F9FF);
}
.web3-hero {
  padding: 58px 0 38px;
  overflow: hidden;
}
.web3-hero .content-container {
  display: grid;
  align-items: center;
  gap: 34px;
}
.eyebrow, .section-eyebrow, .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(41,128,254,.16);
  border-radius: 999px;
  padding: 7px 12px;
  font-weight: 800;
  font-size: .88rem;
  margin-bottom: 16px;
}
.lead {
  font-size: 1.06rem;
  color: #4B5563;
  max-width: 720px;
}
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin: 24px 0 20px; }
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 26px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  box-shadow: 0 18px 36px rgba(41,128,254,.24);
  transition: transform .2s ease, box-shadow .2s ease;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 22px 46px rgba(41,128,254,.28); }
.safety-tags, .pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.safety-tags span, .pill-row span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.78);
  color: #536070;
  font-size: .9rem;
}
.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
}
.hero-visual::before {
  content: "";
  position: absolute;
  width: min(88vw, 540px);
  height: min(88vw, 540px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41,128,254,.18), rgba(41,128,254,.04) 56%, transparent 72%);
}
.platform-stage {
  position: relative;
  width: min(88vw, 390px);
  padding: 20px;
  border-radius: 42px;
  background: linear-gradient(145deg, rgba(255,255,255,.94), rgba(234,243,255,.86));
  border: 1px solid rgba(41,128,254,.16);
  box-shadow: var(--shadow);
}
.platform-stage img {
  margin: 0 auto;
  max-height: 520px;
  object-fit: contain;
}
.platform-orbit {
  position: absolute;
  inset: -22px;
  border: 1px dashed rgba(41,128,254,.22);
  border-radius: 46px;
  pointer-events: none;
}
.float-label {
  position: absolute;
  z-index: 4;
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 12px;
  box-shadow: var(--shadow-blue);
  color: #2E3A4A;
  font-weight: 800;
  font-size: .82rem;
}
.float-label.one { left: -8px; top: 16%; }
.float-label.two { right: -12px; top: 34%; }
.float-label.three { left: 8px; bottom: 20%; }
.float-label.four { right: 4px; bottom: 9%; }

.ecosystem-nav {
  padding: 28px 0 58px;
}
.section-title {
  max-width: 780px;
  margin: 0 auto 28px;
  text-align: center;
}
.ecosystem-grid, .category-grid, .card-grid, .risk-grid, .process-steps {
  display: grid;
  gap: 16px;
}
.ecosystem-card, .service-card, .info-card, .risk-card, .step-card, .faq-item, .category-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px rgba(31,41,55,.045);
}
.ecosystem-card {
  padding: 20px;
  min-height: 170px;
  position: relative;
  overflow: hidden;
}
.ecosystem-card::after {
  content: "";
  position: absolute;
  width: 112px;
  height: 112px;
  right: -46px;
  bottom: -48px;
  border-radius: 50%;
  background: rgba(41,128,254,.09);
}
.mini-tag {
  display: inline-flex;
  width: fit-content;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 900;
  font-size: .78rem;
  margin-bottom: 10px;
}
.text-link {
  color: var(--primary);
  font-weight: 900;
}

.service-section {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto 30px;
  padding: 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.88);
  box-shadow: var(--shadow);
  display: grid;
  gap: 26px;
  align-items: center;
  overflow: hidden;
}
.service-section.alt {
  background: linear-gradient(135deg, #FFFFFF 0%, #F4F8FF 100%);
}
.web3-section {}
.hardware-wallet-section {}
.digital-assets-section {}
.swap-section {}
.privacy-section {}
.submit-chain-section {}
.developer-center-section {}
.service-copy ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
}
.service-copy li::marker { color: var(--primary); }
.service-visual {
  min-height: 250px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, #F5F9FF, #FFFFFF);
  border: 1px solid rgba(41,128,254,.12);
  display: grid;
  place-items: center;
  padding: 18px;
  position: relative;
  overflow: hidden;
}
.service-visual::before {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 24px;
  border: 1px dashed rgba(41,128,254,.18);
}
.service-visual img {
  position: relative;
  z-index: 1;
  max-height: 420px;
  object-fit: contain;
}
.privacy-panel, .submit-panel, .developer-panel {
  display: grid;
  gap: 14px;
}
.code-panel {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: #F8FBFF;
  border: 1px solid rgba(41,128,254,.16);
  color: #334155;
  border-radius: 22px;
  padding: 18px;
  overflow: hidden;
}
.code-line {
  display: block;
  padding: 5px 0;
  border-bottom: 1px solid rgba(229,234,242,.7);
}
.code-line:last-child { border-bottom: 0; }
.section-block {
  padding: 58px 0;
}
.step-card {
  padding: 20px;
}
.step-number {
  width: 38px;
  height: 38px;
  border-radius: 15px;
  display: inline-grid;
  place-items: center;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  margin-bottom: 12px;
}
.risk-card {
  padding: 20px;
  border-left: 4px solid var(--primary);
}
.risk-card strong, .category-card strong, .ecosystem-card strong { display: block; color: var(--deep); margin-bottom: 8px; font-size: 1.04rem; }
.risk-card .suggestion {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--primary-pale);
  color: #374151;
  font-size: .92rem;
}
.faq-list {
  display: grid;
  gap: 14px;
}
.faq-item {
  padding: 20px;
}
.faq-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.cta-section {
  width: min(1200px, calc(100% - 32px));
  margin: 38px auto 72px;
  padding: clamp(30px, 7vw, 64px);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 15% 20%, rgba(41,128,254,.18), transparent 30%),
    linear-gradient(135deg, #F5F9FF, #FFFFFF);
  border: 1px solid rgba(41,128,254,.14);
  text-align: center;
  box-shadow: var(--shadow-blue);
}
.cta-section p { max-width: 720px; margin-left: auto; margin-right: auto; }

.page-hero {
  padding: 54px 0 30px;
}
.page-hero .content-container, .page-hero .narrow-container {
  background: linear-gradient(135deg, #FFFFFF, #F4F8FF);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: clamp(24px, 6vw, 54px);
  box-shadow: var(--shadow-blue);
}
.page-layout {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto 70px;
  display: grid;
  gap: 20px;
}
.article-main {
  display: grid;
  gap: 18px;
}
.info-card {
  padding: 22px;
}
.info-card h2 { font-size: 1.42rem; }
.checklist {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.checklist li {
  padding: 13px 14px;
  border-radius: 16px;
  background: var(--primary-pale);
  color: #465367;
  border: 1px solid rgba(41,128,254,.10);
}
.safety-panel {
  padding: 20px;
  border-radius: 24px;
  border: 1px solid rgba(41,128,254,.14);
  background: linear-gradient(180deg, #FFFFFF, #F5F9FF);
}
.side-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}
.side-panel .info-card, .side-panel .safety-panel { position: sticky; top: 96px; }
.download-steps {
  counter-reset: dstep;
  list-style: none;
  padding: 0;
  display: grid;
  gap: 14px;
}
.download-steps li {
  counter-increment: dstep;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px 18px 18px 64px;
  position: relative;
}
.download-steps li::before {
  content: counter(dstep);
  position: absolute;
  left: 18px;
  top: 18px;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  display: grid;
  place-items: center;
}

.site-footer {
  background: #F4F7FB;
  border-top: 1px solid var(--line);
  padding: 34px 0 18px;
}
.footer-inner {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 22px;
}
.footer-brand {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.footer-brand img { width: 42px; height: 42px; object-fit: contain; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}
.footer-links a { color: #536070; font-weight: 700; }
.footer-bottom {
  width: min(1200px, calc(100% - 32px));
  margin: 24px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: #7B8493;
  font-size: .9rem;
}

@media (min-width: 640px) {
  .ecosystem-grid, .category-grid, .card-grid { grid-template-columns: repeat(2, 1fr); }
  .risk-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-nav a { font-size: .88rem; padding: 8px 9px; }
  .web3-hero { padding: 78px 0 46px; }
  .web3-hero .content-container { grid-template-columns: 1.02fr .98fr; }
  .ecosystem-grid { grid-template-columns: repeat(4, 1fr); }
  .ecosystem-card:nth-child(1), .ecosystem-card:nth-child(7) { grid-column: span 2; }
  .service-section {
    grid-template-columns: 1fr .9fr;
    padding: clamp(30px, 5vw, 56px);
    margin-bottom: 34px;
  }
  .service-section.reverse { grid-template-columns: .9fr 1fr; }
  .service-section.reverse .service-visual { order: -1; }
  .privacy-section, .submit-chain-section, .developer-center-section {
    grid-template-columns: .95fr 1.05fr;
  }
  .process-steps { grid-template-columns: repeat(3, 1fr); }
  .risk-grid { grid-template-columns: repeat(4, 1fr); }
  .page-layout { grid-template-columns: minmax(0, 1fr) 320px; }
  .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 1120px) {
  .site-nav a { padding: 9px 11px; }
  .process-steps { grid-template-columns: repeat(6, 1fr); }
}
@media (max-width: 380px) {
  .header-inner, .content-container, .narrow-container, .page-layout, .service-section, .cta-section {
    width: min(100% - 22px, 1200px);
  }
  .download-btn { width: 100%; }
  .float-label { display: none; }
}