:root {
    --primary: #4f46e5;
    --secondary: #8b5cf6;
    --text: #1f2937;
    --text-light: #4b5563;
    --text-muted: #9ca3af;
    --bg: #ffffff;
    --bg-light: #f9fafb;
    --border: #e5e7eb;
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.8;
}

/* ===== 顶部导航 ===== */
.legal-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.legal-header-inner {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.legal-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
}

.legal-brand img { width: 34px; height: 34px; border-radius: 8px; }
.legal-brand-text { font-weight: 700; font-size: 1.05rem; }
.legal-brand-text em {
    font-style: normal;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 6px;
    font-size: 0.9rem;
}

.legal-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
}

.legal-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: #f5f3ff;
}

/* ===== 页头 ===== */
.legal-hero {
    text-align: center;
    padding: 48px 24px 32px;
    background:
        radial-gradient(600px 220px at 50% -40px, rgba(99, 102, 241, 0.15), transparent),
        var(--bg-light);
    border-bottom: 1px solid var(--border);
}

.legal-hero h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.02em; }
.legal-hero p { margin-top: 10px; color: var(--text-light); font-size: 0.95rem; }

/* ===== 子导航 ===== */
.legal-tabs {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    position: sticky;
    top: 60px;
    z-index: 40;
}

.legal-tab {
    padding: 14px 18px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.legal-tab:hover { color: var(--primary); }
.legal-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* ===== 正文 ===== */
.legal-main { max-width: 860px; margin: 0 auto; padding: 8px 24px 72px; }

.legal-card {
    padding: 40px 8px 16px;
}

.legal-card h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.legal-card .updated {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.legal-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 28px 0 8px;
}

.legal-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.legal-card ul {
    padding-left: 20px;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.legal-card li { margin: 4px 0; }

/* ===== 页脚 ===== */
.legal-footer {
    border-top: 1px solid var(--border);
    background: var(--bg-light);
    padding: 28px 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== 响应式 ===== */
@media (max-width: 720px) {
    .legal-hero h1 { font-size: 1.6rem; }
    .legal-tab { padding: 12px 12px; font-size: 0.9rem; }
}