:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #f0b429;
    --color-surface: #faf5ff;
    --color-text: #1e1b2e;
    --rgb-primary: 109,40,217;
    --rgb-accent: 240,180,41;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(76,29,149,.06), 0 1px 3px rgba(76,29,149,.04);
    --shadow-md: 0 4px 8px rgba(76,29,149,.05), 0 20px 40px -10px rgba(76,29,149,.12);
    --shadow-lg: 0 8px 16px rgba(76,29,149,.07), 0 32px 64px -16px rgba(76,29,149,.18);
    --space-section: 2.2rem;
    --space-card: 1.1rem;
    --space-gap: 0.8rem;
    --transition: 0.4s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #0f0f1a; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 2px rgba(109,40,217,.08); }
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); background: #ffffff; border-color: rgba(109,40,217,.15); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 2px 8px rgba(109,40,217,.18), 0 8px 24px -6px rgba(109,40,217,.22); accent-color: var(--color-primary); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); caret-color: var(--color-accent); }

/* ========== 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: 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: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; color: var(--color-accent); text-shadow: 0 2px 12px rgba(240,180,41,.35); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #4c1d95 0%, #6d28d9 50%, #7c3aed 100%); color: #faf5ff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(250,245,255,.12), 0 20px 60px -20px rgba(109,40,217,.5); }

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

/* 条件性装饰 */
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { box-shadow: 0 2px 12px rgba(76,29,149,.18), 0 12px 32px -8px rgba(76,29,149,.22); background: rgba(15,15,26,.92); backdrop-filter: blur(12px); }

/* 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; }
}