:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #666666;
  --color-line: #e8e4df;
  --color-accent: #d4632f;
  --color-accent-soft: #e8734a;
  --color-brown: #3d2b1f;
  --container: 1120px;
  --header-h: 72px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.section-title {
  margin: 0 0 48px;
  text-align: center;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  margin: 14px auto 0;
  border-radius: 2px;
  background: var(--color-accent);
}

.text-accent {
  color: var(--color-accent);
}

/* Footer — 全站统一四列布局 */
.site-footer {
  padding: 56px 0 64px;
  background: #ffffff;
  border-top: 1px solid var(--color-line);
}

.footer-bar {
  display: grid;
  grid-template-columns: auto 1px auto 1px auto 1px auto;
  align-items: center;
  justify-content: center;
  gap: 0 48px;
}

.footer-bar__divider {
  width: 1px;
  height: 72px;
  background: var(--color-line);
}

.footer-bar__col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer-bar__col--logo img {
  width: 160px;
  max-width: 100%;
  height: auto;
}

.footer-bar__col--follow {
  flex-direction: row;
  align-items: center;
  gap: 16px;
}

.footer-bar__col--legal {
  gap: 14px;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
}

.footer-bar__col--legal a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-muted);
  transition: color 0.2s;
}

.footer-bar__col--legal a:hover {
  color: var(--color-text);
}

.footer-bar__col--legal a.is-active {
  color: var(--color-text);
}

.footer-bar__col--legal a.is-active::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

.footer-icp {
  font-size: 13px;
  color: var(--color-muted);
}

.footer-icp:hover {
  color: var(--color-accent);
}

.footer-info-qr {
  width: 96px;
  height: 96px;
  border-radius: 4px;
}

.footer-info-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-info-item img {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  flex-shrink: 0;
  object-fit: contain;
}

.footer-info-item div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-info-item__label {
  font-size: 13px;
  color: var(--color-muted);
}

.footer-info-item__value {
  font-size: 14px;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .footer-bar {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }

  .footer-bar__divider {
    display: none;
  }

  .footer-bar__col {
    align-items: center;
  }

  .footer-bar__col--follow {
    flex-direction: column;
    align-items: center;
  }

  .footer-legal-links {
    justify-content: center;
  }

  .footer-bar__col--legal a {
    justify-content: center;
  }

  .footer-info-item {
    justify-content: center;
  }
}