/* Biyoo / Hibiyoo 协议页 — 移动端优先 */
:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #666666;
  --border: #e8e8e8;
  --link: #1677ff;
  --accent: #f5f7fa;
  --max-w: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --text: #f0f0f0;
    --muted: #a0a0a0;
    --border: #303030;
    --link: #69b1ff;
    --accent: #1f1f1f;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 1rem 1.25rem 3rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans TC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

.legal-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
}

.legal-meta {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
  padding: 0.875rem 1rem;
  background: var(--accent);
  border-radius: 10px;
  border: 1px solid var(--border);
  line-height: 1.5;
}

h1 {
  font-size: 1.625rem;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

article h2 {
  font-size: 1.125rem;
  margin: 2rem 0 0.75rem;
  padding-top: 0.25rem;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

article h3 {
  font-size: 1rem;
  margin: 1.25rem 0 0.5rem;
  font-weight: 600;
}

article h4 {
  font-size: 0.95rem;
  margin: 1rem 0 0.4rem;
  font-weight: 600;
}

article p {
  margin: 0.55rem 0;
  text-align: justify;
  word-break: break-word;
}

article ul {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1.35rem;
}

article li {
  margin: 0.35rem 0;
}

article li p {
  margin: 0.2rem 0;
}

strong {
  font-weight: 600;
}

a {
  color: var(--link);
  text-decoration: none;
  word-break: break-all;
}

a:hover {
  text-decoration: underline;
}

body.legal-shell {
  padding-top: 0;
}

.legal-site-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 2;
}

.legal-site-bar a {
  color: var(--link);
  font-weight: 600;
}

.language-switch {
  display: inline-flex;
  gap: 4px;
}

.language-switch button {
  min-width: 42px;
  min-height: 34px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  font: inherit;
  font-size: 0.875rem;
}

.language-switch button[aria-pressed="true"] {
  background: var(--link);
  color: #fff;
  border-color: var(--link);
}

.delete-identity {
  display: grid;
  grid-template-columns: minmax(7rem, 9rem) 1fr;
  gap: 0.35rem 1rem;
  margin: 1.25rem 0 0;
  padding: 0.875rem 1rem;
  background: var(--accent);
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.925rem;
}

.delete-identity dt {
  color: var(--muted);
  margin: 0;
  font-weight: 500;
}

.delete-identity dd {
  margin: 0;
  font-weight: 600;
}

.delete-steps {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.delete-steps li {
  padding: 0.5rem 0.35rem;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--accent);
  line-height: 1.35;
}

.legal-notice-warning {
  margin-top: 1rem;
  padding: 0.875rem 1rem;
  border-left: 4px solid #f79009;
  border-radius: 0 8px 8px 0;
  background: #fffaeb;
  font-size: 0.925rem;
}

.legal-cta {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--link);
  color: #fff !important;
  font-weight: 700;
  text-decoration: none !important;
}

.legal-hint {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.legal-page-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

@media (prefers-color-scheme: dark) {
  .legal-notice-warning {
    background: #2a2218;
  }
}

@media (max-width: 640px) {
  .delete-steps {
    grid-template-columns: 1fr;
  }

  .delete-identity {
    grid-template-columns: 1fr;
  }

  .legal-cta {
    display: block;
    text-align: center;
  }
}

@media (min-width: 768px) {
  body {
    padding: 2rem 1.5rem 4rem;
    font-size: 17px;
  }

  h1 {
    font-size: 1.875rem;
  }
}