:root {
    --color-primary: #2b5a7a;
    --color-primary-dark: #123a53;
    --color-accent: #f59e0b;
    --color-surface: #f8fafc;
    --color-text: #0f2f3a;
    --rgb-primary: 43,90,122;
    --rgb-accent: 245,158,11;
    --radius-sm: 3px;
    --radius-md: 9px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.08), 0 8px 18px rgba(2, 6, 23, 0.06);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.55) inset;
    --shadow-lg: 0 10px 26px rgba(2, 6, 23, 0.10), 0 32px 70px -26px rgba(2, 6, 23, 0.18), 0 1px 0 rgba(255,255,255,0.6) inset;
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.38s cubic-bezier(0.16, 1, 0.3, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;
    --outline-color: rgba(245, 158, 11, 0.55);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(0,0,0,0.12), 0 0 0 1px rgba(var(--rgb-primary), 0.14) inset;
    padding: var(--space-card);
    transition: var(--transition);
    border: 0;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 6px 16px rgba(2, 6, 23, 0.12), 0 1px 0 rgba(255,255,255,0.55) inset;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.22); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 6px 18px rgba(245,158,11,0.35); }

section, .section { background: rgba(248, 250, 252, 0.0); }

.card { border: 1px solid rgba(var(--rgb-primary), .12); }

.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(135deg, rgba(43,90,122,0.98) 0%, rgba(18,58,83,0.96) 55%, rgba(245,158,11,0.18) 110%);
    box-shadow: 0 10px 26px rgba(2, 6, 23, 0.14), 0 30px 80px -40px rgba(2, 6, 23, 0.22);
    border-radius: var(--radius-xl);
}

header, .header, .navbar { background: transparent; }

/* ========== Section Layout Variants ========== */

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* Responsive */
@media (max-width: 1024px) {
    .news-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .feature-list { grid-template-columns: repeat(2, 1fr) !important; }
    .partner-grid { grid-template-columns: repeat(3, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .hero-inner { grid-template-columns: 1fr !important; }
}
@media (max-width: 640px) {
    :root { --space-section: 2rem; --space-card: 1rem; --space-gap: 0.75rem; }
    .news-grid { grid-template-columns: 1fr !important; }
    .feature-list { grid-template-columns: 1fr !important; }
    .faq-list { grid-template-columns: 1fr !important; }
    .testimonial-list { column-count: 1 !important; }
    .partner-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .cta-inner { grid-template-columns: 1fr !important; }
}