:root {
  --primary: #2196f3;
  --primary-dark: #1976d2;
  --text-main: #1a1a2e;
  --text-sub: #555;
  --text-light: #999;
  --bg-gray: #f5f7fa;
  --border: #ececec;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text-main);
  background: var(--bg-gray);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }

.legal-header {
  position: sticky; top: 0; z-index: 10;
  background: #fff; border-bottom: 1px solid var(--border);
  height: 64px; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 1px 8px rgba(0,0,0,0.04);
}
.legal-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 700; color: var(--text-main);
}
.legal-brand img { width: 34px; height: 34px; border-radius: 9px; }
.back-home {
  font-size: 14px; padding: 8px 16px; border-radius: 20px;
  background: var(--bg-gray); color: var(--text-sub);
}
.back-home:hover { background: var(--primary); color: #fff; }

.legal-main {
  max-width: 820px; margin: 40px auto; padding: 48px 56px;
  background: #fff; border-radius: 18px;
  box-shadow: 0 6px 32px rgba(0,0,0,0.05);
}
.legal-title {
  font-size: 32px; font-weight: 800; margin-bottom: 8px; line-height: 1.3;
  background: linear-gradient(90deg, var(--primary-dark), var(--primary));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.legal-meta {
  color: var(--text-light); font-size: 13px; margin-bottom: 32px;
  padding-bottom: 18px; border-bottom: 1px solid var(--border);
}
.legal-lead {
  font-size: 15px; color: var(--text-sub);
  background: linear-gradient(135deg, rgba(33,150,243,0.06), rgba(25,118,210,0.06));
  border-left: 4px solid var(--primary);
  padding: 16px 20px; border-radius: 0 12px 12px 0; margin-bottom: 28px;
}
section { margin-bottom: 28px; }
section h2 {
  font-size: 19px; font-weight: 700; color: var(--text-main);
  margin-bottom: 12px; padding-left: 12px;
  border-left: 4px solid var(--primary);
}
section p { color: var(--text-sub); margin-bottom: 12px; font-size: 15px; }
section ul { padding-left: 22px; margin-bottom: 12px; color: var(--text-sub); }
section li { margin-bottom: 8px; font-size: 15px; }
section li strong { color: var(--text-main); }

.legal-footer {
  text-align: center; padding: 32px 18px;
  color: var(--text-light); font-size: 13px; line-height: 1.9;
}
.legal-footer a { color: var(--text-sub); }
.legal-footer a:hover { color: var(--primary); }
.legal-footer .sep { margin: 0 8px; color: var(--text-light); }

@media (max-width: 768px) {
  .legal-header { padding: 0 18px; }
  .legal-main { margin: 18px 12px; padding: 28px 20px; border-radius: 14px; }
  .legal-title { font-size: 24px; }
  section h2 { font-size: 17px; }
}