* {
  box-sizing: border-box;
}

:root {
  --primary: #2980FE;
  --primary-dark: #1564d8;
  --text: #1f2937;
  --muted: #667085;
  --soft: #f5f8fc;
  --soft-blue: #eef6ff;
  --line: #e5eaf2;
  --white: #ffffff;
  --shadow: 0 18px 40px rgba(31, 41, 55, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --container: 1180px;
}

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: #ffffff;
  line-height: 1.75;
  overflow-x: hidden;
}

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

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

.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 {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .02em;
  color: #111827;
}

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

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

.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 0 11px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: #111827;
}

.main-nav {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 72px;
  display: none;
  flex-direction: column;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--white);
  box-shadow: var(--shadow);
}

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

.main-nav a {
  padding: 12px 14px;
  border-radius: 14px;
  color: #4b5563;
  font-size: 15px;
  font-weight: 650;
}

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

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

.web3-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 20%, rgba(41, 128, 254, .16), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
  padding: 42px 0 34px;
}

.web3-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(41,128,254,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41,128,254,.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.65), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  align-items: center;
}

.hero-copy {
  max-width: 640px;
}

.eyebrow,
.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: rgba(41, 128, 254, 0.1);
  border: 1px solid rgba(41, 128, 254, 0.18);
  font-size: 13px;
  font-weight: 760;
}

h1,
h2,
h3 {
  line-height: 1.22;
  margin: 0 0 14px;
  color: #121826;
}

h1 {
  font-size: clamp(34px, 8vw, 68px);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(27px, 5.5vw, 44px);
  letter-spacing: -0.03em;
}

h3 {
  font-size: 20px;
}

.lead,
.section-lead {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 24px;
}

.hero-actions,
.page-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin: 24px 0;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 14px 28px rgba(41, 128, 254, .25);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  background: var(--primary-dark);
  box-shadow: 0 16px 34px rgba(41, 128, 254, .32);
}

.ghost-link {
  color: var(--primary);
  font-weight: 760;
}

.safety-tags,
.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.safety-tags span,
.feature-tags span,
.mini-tag {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  color: #42526b;
  font-size: 13px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 340px;
  display: grid;
  place-items: center;
}

.product-frame {
  position: relative;
  width: min(86vw, 430px);
  padding: 18px;
  border-radius: 34px;
  background: linear-gradient(145deg, rgba(255,255,255,.98), rgba(238,246,255,.95));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.product-frame img {
  width: 100%;
  border-radius: 26px;
  object-fit: contain;
}

.float-card {
  position: absolute;
  display: none;
  padding: 10px 13px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  box-shadow: 0 14px 30px rgba(31, 41, 55, 0.08);
  color: #344054;
  font-size: 13px;
  font-weight: 760;
}

.section {
  padding: 62px 0;
}

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

.section.soft-blue {
  background: linear-gradient(180deg, #f7fbff 0%, #eef6ff 100%);
}

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

.ecosystem-nav {
  margin-top: -6px;
  padding: 34px 0 52px;
  background: #ffffff;
}

.ecosystem-grid,
.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.ecosystem-card,
.info-card,
.risk-card,
.faq-item,
.step-card,
.guide-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: 0 10px 26px rgba(31, 41, 55, .05);
}

.ecosystem-card {
  min-height: 186px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ecosystem-card .card-label {
  width: fit-content;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(41, 128, 254, .1);
  color: var(--primary);
  font-weight: 800;
  font-size: 12px;
}

.ecosystem-card p,
.info-card p,
.risk-card p,
.step-card p,
.guide-card p {
  color: var(--muted);
  margin: 0 0 12px;
}

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

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

.split-section.reverse .visual-card {
  order: -1;
}

.visual-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 20px;
}

.visual-card img {
  width: 100%;
  border-radius: 22px;
  object-fit: contain;
  background: var(--soft-blue);
}

.bullet-list,
.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.bullet-list li,
.check-list li {
  position: relative;
  padding-left: 28px;
  color: #475467;
}

.bullet-list li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 0 5px rgba(41, 128, 254, .12);
}

.privacy-section .privacy-panel,
.submit-chain-section .submit-panel,
.developer-center-section .developer-panel {
  border-radius: var(--radius-xl);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.privacy-points,
.submit-points {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.privacy-point,
.submit-point {
  padding: 16px;
  border-radius: 18px;
  background: var(--soft-blue);
  border: 1px solid rgba(41, 128, 254, .12);
}

.code-panel {
  border-radius: 22px;
  padding: 18px;
  background: #f8fbff;
  border: 1px solid var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #24466b;
  overflow: auto;
}

.code-panel span {
  color: var(--primary);
}

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

.step-card {
  position: relative;
  padding-top: 54px;
}

.step-number {
  position: absolute;
  left: 18px;
  top: 18px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 11px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

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

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

.risk-name {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--primary);
  font-weight: 850;
}

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

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

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

.cta-section {
  padding: 64px 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(41,128,254,.14), transparent 30%),
    linear-gradient(135deg, #f7fbff, #eef6ff);
}

.cta-card {
  text-align: center;
  padding: 34px 22px;
  border-radius: 32px;
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-hero {
  padding: 50px 0 26px;
  background:
    radial-gradient(circle at 85% 20%, rgba(41,128,254,.14), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.page-hero-inner {
  width: min(100% - 32px, 980px);
  margin: 0 auto;
}

.page-summary {
  color: var(--muted);
  font-size: 18px;
  margin: 12px 0 0;
}

.content-layout {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
  display: grid;
  gap: 24px;
  padding: 38px 0 70px;
}

.article-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow);
}

.article-panel p {
  margin: 0 0 18px;
  color: #475467;
}

.aside-panel {
  display: grid;
  gap: 14px;
  align-content: start;
}

.notice-box,
.check-box {
  border-radius: 22px;
  background: var(--soft-blue);
  border: 1px solid rgba(41,128,254,.16);
  padding: 20px;
}

.notice-box h2,
.check-box h2 {
  font-size: 22px;
}

.notice-box p,
.check-box p {
  color: var(--muted);
  margin: 0;
}

.guide-grid {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}

.timeline {
  display: grid;
  gap: 14px;
  margin: 24px 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: start;
}

.timeline-item strong {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
}

.timeline-item div {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px;
  background: #fff;
}

.two-column-cards {
  display: grid;
  gap: 14px;
}

.download-steps {
  counter-reset: downloadStep;
  display: grid;
  gap: 14px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.download-steps li {
  counter-increment: downloadStep;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px 16px 16px 62px;
  background: #fff;
  position: relative;
}

.download-steps li::before {
  content: counter(downloadStep);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

.site-footer {
  background: #111827;
  color: #d1d5db;
  padding-top: 42px;
}

.footer-inner {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
  display: grid;
  gap: 30px;
}

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

.footer-brand p {
  color: #9ca3af;
  margin: 8px 0 0;
}

.footer-logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
}

.footer-links {
  display: grid;
  gap: 22px;
}

.footer-links h3 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 10px;
}

.footer-links a {
  display: block;
  color: #b9c0cc;
  margin: 7px 0;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  width: min(100% - 32px, var(--container));
  margin: 34px auto 0;
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 18px 0 24px;
  display: grid;
  gap: 8px;
  color: #9ca3af;
  font-size: 14px;
}

@media (min-width: 640px) {
  .ecosystem-grid,
  .category-grid,
  .guide-grid,
  .two-column-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 880px) {
  .nav-toggle {
    display: none;
  }

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

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

  .web3-hero {
    padding: 82px 0 62px;
  }

  .hero-inner {
    grid-template-columns: 1.05fr .95fr;
    gap: 46px;
  }

  .float-card {
    display: block;
  }

  .float-card.one {
    left: -20px;
    top: 34px;
  }

  .float-card.two {
    right: -24px;
    top: 84px;
  }

  .float-card.three {
    left: 8px;
    bottom: 54px;
  }

  .float-card.four {
    right: -10px;
    bottom: 22px;
  }

  .section {
    padding: 82px 0;
  }

  .section-title-row {
    grid-template-columns: .82fr 1fr;
    align-items: end;
  }

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

  .ecosystem-grid .wide {
    grid-column: span 2;
  }

  .split-section {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .split-section.reverse .visual-card {
    order: 1;
  }

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

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

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

  .article-panel {
    padding: 34px;
  }

  .footer-inner {
    grid-template-columns: .95fr 1.55fr;
  }

  .footer-bottom {
    grid-template-columns: 1fr 1fr;
    justify-items: start;
  }

  .footer-bottom span:last-child {
    justify-self: end;
  }
}

@media (min-width: 1080px) {
  .main-nav a {
    padding: 9px 12px;
  }

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