:root {
  --bg: #f7fbff;
  --surface: #ffffff;
  --primary: #0f377f;
  --primary-soft: #1f55b0;
  --line: #d4e4ff;
  --text: #122949;
  --muted: #55719e;
  --accent: #2a6df2;
  --accent-hover: #1e5fdd;
  --shadow: 0 14px 34px rgba(35, 94, 210, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 8%, #edf5ff 0%, transparent 38%),
    radial-gradient(circle at 92% 12%, #eaf3ff 0%, transparent 34%),
    linear-gradient(180deg, #fafdff 0%, #f2f8ff 100%),
    var(--bg);
  line-height: 1.65;
}

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

.header,
.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 20px rgba(39, 93, 199, 0.08);
  margin-bottom: 16px;
}

.header {
  padding: 12px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand,
.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.3px;
}

.nav,
.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  color: var(--muted);
  flex-wrap: wrap;
}

.nav a:hover,
.nav-links a:hover,
.nav a.active,
.nav-links a.active {
  color: var(--primary);
  font-weight: 700;
}

.hero,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 24px;
}

.hero h1 {
  font-size: clamp(28px, 3.8vw, 42px);
  line-height: 1.2;
  color: var(--primary);
  margin: 0 0 10px;
}

.hero p,
.muted {
  color: var(--muted);
}

.card {
  padding: 20px;
}

.legal-layout h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.2;
  color: var(--primary);
  margin: 0 0 10px;
}

.legal-layout h2 {
  margin: 18px 0 8px;
  color: var(--primary);
  font-size: 21px;
}

.legal-updated {
  color: var(--muted);
  margin-bottom: 18px;
  font-size: 14px;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.btn,
button.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover,
button.btn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn.secondary,
button.btn.secondary {
  background: #e8f1ff;
  color: var(--primary);
  border-color: #bfd6ff;
}

.btn.secondary:hover,
button.btn.secondary:hover {
  background: #dfeeff;
  border-color: #9fc2ff;
}

.clean {
  margin: 8px 0 0 18px;
}

.footer {
  margin-top: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 14px 16px;
  color: var(--muted);
  font-size: 13px;
}

.footer-links {
  margin-top: 8px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--primary-soft);
  font-weight: 600;
}

.legal-note {
  margin-top: 8px;
  font-size: 12px;
}

/* Generic SEO page compatibility */
.seo-track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.seo-track-card,
.adv-item,
.plan-card,
.download-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 14px;
}

.seo-track-list {
  margin: 8px 0 0 18px;
}

.seo-track-links {
  display: grid;
  gap: 8px;
}

.seo-track-links a {
  border: 1px solid #d7e5ff;
  border-radius: 10px;
  background: #f9fcff;
  padding: 10px;
  display: grid;
  gap: 4px;
}

.seo-track-meta,
.chip-row,
.hero-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.seo-track-badge,
.chip,
.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid #bfd6ff;
  background: #e8f1ff;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid #c8d8fb;
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

@media (max-width: 860px) {
  .header {
    flex-direction: column;
    align-items: flex-start;
  }
}