:root {
    --color-primary: #0f3d2e;
    --color-primary-dark: #0b2f25;
    --color-accent: #7c3aed;
    --color-surface: #f7fbff;
    --color-text: #0b1220;
    --rgb-primary: 15,61,46;
    --rgb-accent: 124,58,237;
    --radius-sm: 3px;
    --radius-md: 7px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 3px 8px rgba(10, 15, 25, 0.06);
    --shadow-md: 0 4px 10px rgba(10, 15, 25, 0.08), 0 18px 38px -14px rgba(10, 15, 25, 0.18);
    --shadow-lg: 0 6px 16px rgba(10, 15, 25, 0.10), 0 28px 70px -26px rgba(10, 15, 25, 0.22);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.38s ease;
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: color var(--transition); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: 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: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.08), 0 30px 70px -28px rgba(0,0,0,0.22);
    border-color: rgba(124, 58, 237, 0.22);
}
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type {
    background: radial-gradient(1200px 600px at 15% 20%, rgba(124, 58, 237, 0.22) 0%, rgba(124, 58, 237, 0.04) 40%, rgba(15,61,46,0.00) 70%),
                linear-gradient(135deg, #0f3d2e 0%, #0b2f25 50%, rgba(11,47,37,0.85) 100%);
}
.card { border: 1px solid rgba(var(--rgb-primary), .12); }
header, .header, .navbar {
    box-shadow: 0 4px 14px rgba(10, 15, 25, 0.08), 0 18px 40px -22px rgba(10, 15, 25, 0.22);
    border-color: rgba(124,58,237,0.10);
}

/* 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; }
}