:root {
    --color-primary: #1a365d;
    --color-primary-dark: #0a1628;
    --color-accent: #e85d3a;
    --color-surface: #fef6f0;
    --color-text: #0a1628;
    --rgb-primary: 26,54,93;
    --rgb-accent: 232,93,58;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 28px;
    --shadow-sm: 0 0 12px rgba(232,93,58,0.15);
    --shadow-md: 0 0 24px rgba(232,93,58,0.25), 0 0 48px rgba(26,54,93,0.12);
    --shadow-lg: 0 0 32px rgba(232,93,58,0.4), 0 0 64px rgba(26,54,93,0.2), 0 8px 24px rgba(10,22,40,0.15);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 0 20px rgba(232,93,58,0.15); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); border: 1px solid rgba(232,93,58,0.12); background: rgba(255,255,255,0.85); backdrop-filter: blur(8px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 0 16px rgba(232,93,58,0.3); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 16px rgba(232,93,58,0.5); }

/* ========== 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: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* 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: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #1a365d 0%, #0a1628 50%, #1a365d 100%); color: #fef6f0; padding: 4rem 2rem; box-shadow: 0 0 48px rgba(232,93,58,0.35), inset 0 0 80px rgba(232,93,58,0.08); border-top: 2px solid rgba(232,93,58,0.4); border-bottom: 2px solid rgba(232,93,58,0.4); }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: 0 0 32px rgba(232,93,58,0.6), 0 0 64px rgba(26,54,93,0.25), 0 12px 32px rgba(10,22,40,0.18); border-color: rgba(232,93,58,0.4); }
header, .header, .navbar { background: transparent; }

/* 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; }
}