* { box-sizing: border-box; }

:root {
  color-scheme: light;
  --info-bg: #ffffff;
  --info-surface: #f7f7f9;
  --info-text: #1f1f26;
  --info-text-secondary: #5e5d69;
  --info-text-muted: #96949f;
  --info-line: #e8e7ec;
  --info-accent: #6758c9;
  --info-safe-bottom: env(safe-area-inset-bottom, 0px);
}

html { scroll-behavior: smooth; }

body.info-page {
  max-width: none;
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  background: var(--info-bg);
  color: var(--info-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.info-page a { color: var(--info-accent); text-decoration: none; }
.info-page a:focus-visible { outline: 3px solid rgba(103, 88, 201, .24); outline-offset: 3px; border-radius: 5px; }

.info-page .site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  border-bottom: 1px solid var(--info-line);
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.info-page .header-inner {
  width: min(calc(100% - 40px), 1080px);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.info-page .brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; color: var(--info-text); font-size: 14px; font-weight: 700; }
.info-page .brand img { width: 34px; height: 34px; border-radius: 10px; box-shadow: 0 5px 14px rgba(76, 62, 157, .15); }
.info-page .site-nav { display: flex; align-items: center; gap: 26px; color: var(--info-text-secondary); font-size: 13px; }
.info-page .site-nav a { position: relative; padding: 21px 0 20px; color: inherit; white-space: nowrap; }
.info-page .site-nav a:hover { color: var(--info-text); }
.info-page .site-nav a[aria-current="page"] { color: var(--info-text); font-weight: 650; }
.info-page .site-nav a[aria-current="page"]::after { content: ""; position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; background: var(--info-accent); }

.info-page .document {
  width: min(calc(100% - 40px), 800px);
  margin: 0 auto;
  padding: 72px 0 calc(88px + var(--info-safe-bottom));
}

.info-page .document > h1 {
  margin: 0;
  color: var(--info-text);
  font-size: clamp(32px, 5vw, 42px);
  font-weight: 720;
  line-height: 1.2;
  letter-spacing: -.025em;
  text-align: left;
}

.info-page .update-date,
.info-page .subtitle {
  margin: 11px 0 42px;
  color: var(--info-text-muted);
  font-size: 13px;
  text-align: left;
}

.info-page .document h2 { margin: 38px 0 13px; color: var(--info-text); font-size: 18px; line-height: 1.45; }
.info-page .document p { margin-bottom: 12px; color: var(--info-text-secondary); text-align: justify; }
.info-page .document strong { color: var(--info-text); }
.info-page .document ul { margin-bottom: 12px; padding-left: 21px; color: var(--info-text-secondary); }
.info-page .document li { margin-bottom: 7px; }
.info-page .document h3 { margin: 0 0 12px; color: var(--info-text); font-size: 16px; line-height: 1.5; }
.info-page .sdk-item { padding: 22px 0 12px; border-top: 1px solid var(--info-line); }
.info-page .sdk-item:first-of-type { margin-top: 20px; }

.info-page .contact { margin-top: 20px; padding: 20px; border-radius: 10px; background: var(--info-surface); }
.info-page .contact p { margin-bottom: 5px; }
.info-page .faq-item { margin-bottom: 0; padding: 20px 0; border-top: 1px solid var(--info-line); }
.info-page .faq-item strong { display: block; margin-bottom: 5px; color: var(--info-text); }
.info-page .faq-item p { margin-bottom: 0; }

.info-page .site-footer { border-top: 1px solid var(--info-line); background: var(--info-surface); }
.info-page .footer-inner {
  width: min(calc(100% - 40px), 1080px);
  min-height: 120px;
  margin: 0 auto;
  padding: 28px 0 calc(28px + var(--info-safe-bottom));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  color: var(--info-text-muted);
  font-size: 12px;
}
.info-page .footer-links { display: flex; flex-wrap: wrap; gap: 18px; color: var(--info-text-secondary); }
.info-page .footer-links a { color: inherit; }
.info-page .footer-links a:hover { color: var(--info-accent); }

@media (max-width: 780px) {
  .info-page .site-header { height: 60px; }
  .info-page .header-inner { width: calc(100% - 32px); }
  .info-page .brand span { display: none; }
  .info-page .site-nav { min-width: 0; gap: 17px; overflow-x: auto; scrollbar-width: none; }
  .info-page .site-nav::-webkit-scrollbar { display: none; }
  .info-page .site-nav a { padding: 18px 0 16px; }
  .info-page .document { width: calc(100% - 36px); padding: 50px 0 calc(62px + var(--info-safe-bottom)); }
  .info-page .document > h1 { font-size: 32px; }
  .info-page .update-date, .info-page .subtitle { margin-bottom: 34px; }
  .info-page .document h2 { margin-top: 32px; font-size: 17px; }
  .info-page .footer-inner { width: calc(100% - 36px); display: block; }
  .info-page .footer-links { margin-top: 15px; gap: 12px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}