:root {
    --color-primary: #2463eb;
    --color-primary-dark: #0f3b85;
    --color-accent: #22c1c3;
    --color-surface: #f3f7ff;
    --color-text: #101826;
    --rgb-primary: 36,99,235;
    --rgb-accent: 34,193,195;
    --radius-sm: 1px;
    --radius-md: 3px;
    --radius-lg: 5px;
    --radius-xl: 7px;
    --shadow-sm: 0 1px 0 rgba(16,24,38,.08), 0 2px 6px rgba(16,24,38,.10);
    --shadow-md: 0 1px 0 rgba(16,24,38,.09), 0 3px 10px rgba(16,24,38,.08), 0 0 0 1px rgba(36,99,235,.07) inset;
    --shadow-lg: 0 2px 0 rgba(16,24,38,.10), 0 6px 18px rgba(16,24,38,.10), 0 0 0 1px rgba(36,99,235,.08) inset;
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

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 1px 0 rgba(16,24,38,.08), 0 6px 18px rgba(15,59,133,.10), 0 0 0 1px rgba(36,99,235,.12) inset; padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,.35); }

/* ========== 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: 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: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 18s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); filter: saturate(1) contrast(1); } 100% { transform: translateX(-50%); filter: saturate(1.05) contrast(1.02); } }

/* 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; text-shadow: 0 1px 0 rgba(255,255,255,.45), 0 10px 30px rgba(15,59,133,.14); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, var(--color-primary) 0%, #0b2b6d 55%, var(--color-accent) 130%); color: #f7fbff; padding: 4rem 2rem; box-shadow: 0 2px 0 rgba(255,255,255,.12) inset, 0 14px 40px rgba(15,59,133,.18); }
.cta-section { border-radius: var(--radius-xl); }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 1px 0 rgba(255,255,255,.45), 0 10px 24px rgba(34,193,195,.20); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(120deg, #112a53 0%, var(--color-primary) 38%, var(--color-primary-dark) 70%, #0b223f 100%); box-shadow: 0 1px 0 rgba(255,255,255,.06) inset, 0 10px 34px rgba(2,16,44,.22); border-radius: var(--radius-xl); }
.card { border: 1px solid rgba(var(--rgb-primary), .14); background: linear-gradient(180deg, rgba(243,247,255,.92) 0%, rgba(243,247,255,.78) 100%); }

.card, [class*="card"] { opacity: 1; }

/* 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; --radius-md: 3px; --radius-lg: 5px; --radius-xl: 6px; --transition: 200ms cubic-bezier(0.2, 0.85, 0.2, 1); }
    .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; }
}