:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #312e81;
    --color-accent: #f59e0b;
    --color-surface: #f1f5f9;
    --color-text: #0f172a;
    --rgb-primary: 79,70,229;
    --rgb-accent: 245,158,11;
    --radius-sm: 12px;
    --radius-md: 999px;
    --radius-lg: 28px;
    --radius-xl: 40px;
    --shadow-sm: 0 4px 12px rgba(var(--rgb-primary),.08), 0 2px 6px rgba(15,23,42,.04);
    --shadow-md: 0 12px 28px -8px rgba(var(--rgb-primary),.16), 0 6px 12px rgba(var(--rgb-primary),.06);
    --shadow-lg: 0 24px 48px -16px rgba(var(--rgb-primary),.20), 0 10px 20px rgba(var(--rgb-primary),.08);
    --space-section: 3.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.2rem;
    --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
    accent-color: var(--color-accent);
    caret-color: var(--color-accent);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #faf9f6; }
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: var(--shadow-md), 0 0 0 1px rgba(var(--rgb-primary), .06); padding: var(--space-card); transition: var(--transition); background: #fff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

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

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: radial-gradient(circle at 85% 30%, rgba(var(--rgb-accent), .35), transparent 60%), linear-gradient(120deg, var(--color-primary-dark), var(--color-primary)); color: #fff; text-shadow: 0 2px 20px rgba(15,23,42,.25); }
                .hero-content { position: relative; z-index: 1; }

/* 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: 2.4rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.4rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary) 60%, #6d28d9); color: #fff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.15); }

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

/* 条件性装饰 */
.card { border-left-color: var(--color-accent); background: linear-gradient(145deg, #ffffff, #f8fafc); }
header, .header, .navbar { background: rgba(255,255,255,.75); -webkit-backdrop-filter: saturate(180%) blur(16px); backdrop-filter: saturate(180%) blur(16px); box-shadow: 0 12px 32px -16px rgba(var(--rgb-primary), .2), 0 0 0 1px rgba(15,23,42,.04); }

/* 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: 2.4rem; --space-card: 1.2rem; --space-gap: 0.9rem; }
    .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; }
}