:root {
    --primary: #1a5276;
    --primary-light: #2980b9;
    --accent: #e74c3c;
    --bg: #ffffff;
    --bg-light: #f8f9fa;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --border: #e0e0e0;
    --radius: 8px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.8; color: var(--text); background: var(--bg); }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { background: var(--primary); color: #fff; padding: 15px 0; position: sticky; top: 0; z-index: 100; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.logo a { color: #fff; text-decoration: none; font-size: 1.4em; font-weight: 700; }
.logo-sub { font-size: 0.75em; color: #bbb; display: block; }
.main-nav { display: flex; gap: 20px; }
.main-nav a { color: #ddd; text-decoration: none; font-size: 0.9em; transition: color .2s; }
.main-nav a:hover, .main-nav a.active { color: #fff; }
.header-contact a { color: var(--accent); text-decoration: none; font-weight: 700; font-size: 1.1em; }

/* Breadcrumb */
.breadcrumb { background: var(--bg-light); padding: 10px 0; font-size: 0.85em; color: var(--text-light); }
.breadcrumb a { color: var(--primary-light); text-decoration: none; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #1a3c5e 100%); color: #fff; padding: 80px 0; text-align: center; }
.hero h1 { font-size: 2.2em; margin-bottom: 20px; line-height: 1.3; }
.hero-sub { font-size: 1.2em; color: #bbb; margin-bottom: 30px; }
.hero-cta { display: flex; gap: 15px; justify-content: center; }
.btn { display: inline-block; padding: 12px 30px; border-radius: var(--radius); text-decoration: none; font-weight: 600; transition: all .2s; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #c0392b; }
.btn-outline { border: 2px solid #fff; color: #fff; }
.btn-outline:hover { background: #fff; color: var(--primary); }

/* Features */
.features { padding: 60px 0; background: var(--bg-light); }
.features h2 { text-align: center; margin-bottom: 40px; font-size: 1.8em; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 25px; }
.feature-card { background: #fff; padding: 30px; border-radius: var(--radius); box-shadow: 0 2px 8px rgba(0,0,0,.08); }
.feature-card h3 { color: var(--primary); margin-bottom: 10px; font-size: 1.1em; }
.feature-card p { color: var(--text-light); font-size: 0.95em; }

/* Data Table */
.data-section { padding: 60px 0; }
.data-section h2 { text-align: center; margin-bottom: 30px; }
.compare-table { width: 100%; border-collapse: collapse; margin: 0 auto; }
.compare-table th, .compare-table td { padding: 14px 18px; text-align: center; border-bottom: 1px solid var(--border); }
.compare-table th { background: var(--primary); color: #fff; }
.compare-table .highlight-row { background: #fff3cd; font-weight: 600; }
.table-note { text-align: center; color: var(--text-light); font-size: 0.85em; margin-top: 10px; }

/* Cases */
.cases-preview { padding: 60px 0; background: var(--bg-light); }
.cases-preview h2 { text-align: center; margin-bottom: 30px; }
.case-grid, .case-list-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; }
.case-card { background: #fff; padding: 25px; border-radius: var(--radius); box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.case-date { color: var(--text-light); font-size: 0.85em; }
.case-card h2, .case-card h3 { margin: 8px 0; }
.case-card h2 a, .case-card h3 a { color: var(--primary); text-decoration: none; }
.case-card h2 a:hover, .case-card h3 a:hover { color: var(--primary-light); }
.case-card p { color: var(--text-light); font-size: 0.9em; }
.tag { display: inline-block; background: #e8f0fe; color: var(--primary); padding: 2px 10px; border-radius: 12px; font-size: 0.8em; margin-right: 5px; }
.more-link { text-align: center; margin-top: 30px; }

/* Trust */
.trust-section { padding: 60px 0; text-align: center; }
.trust-section h2 { margin-bottom: 40px; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.trust-item { padding: 20px; }
.trust-item strong { display: block; font-size: 2em; color: var(--primary); }
.trust-item span { color: var(--text-light); font-size: 0.9em; }

/* Single Page */
.single-page, .case-detail { padding: 50px 0; }
.single-page h1, .case-detail h1 { margin-bottom: 20px; color: var(--primary); }
.subtitle { color: var(--text-light); font-size: 1.1em; margin-bottom: 25px; }
.content { max-width: 800px; }
.content h2 { margin-top: 2em; margin-bottom: 0.5em; color: var(--primary); padding-bottom: 8px; border-bottom: 2px solid var(--primary-light); }
.content h3 { margin-top: 1.5em; color: var(--text); }
.content p { margin-bottom: 1em; }
.content ul, .content ol { margin: 1em 0 1em 1.5em; }
.content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.content th, .content td { padding: 10px 14px; border: 1px solid var(--border); text-align: left; }
.content th { background: var(--bg-light); font-weight: 600; }
.content img { max-width: 100%; height: auto; border-radius: var(--radius); }
.highlight-box { background: #fff3cd; padding: 20px; border-left: 4px solid #ffc107; margin: 1.5em 0; border-radius: 4px; }
.cta-box { background: var(--primary); color: #fff; padding: 30px; border-radius: var(--radius); text-align: center; margin-top: 40px; }
.cta-box p { margin-bottom: 15px; }
.cta-box .btn { background: var(--accent); color: #fff; }

/* Footer */
.site-footer { background: #1a2332; color: #aaa; padding: 50px 0 20px; }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 30px; }
.footer-col h4 { color: #fff; margin-bottom: 15px; }
.footer-col a { display: block; color: #aaa; text-decoration: none; margin-bottom: 8px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #333; padding-top: 20px; text-align: center; font-size: 0.85em; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 1.6em; }
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .main-nav { display: none; }
    .feature-grid { grid-template-columns: 1fr; }
}