:root {
    --color-primary: #334155;
    --color-primary-dark: #0b1220;
    --color-accent: #6d28d9;
    --color-surface: #f8fafc;
    --color-text: #0b1220;
    --rgb-primary: 51,65,85;
    --rgb-accent: 109,40,217;
    --radius-sm: 10px;
    --radius-md: 12px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 0 rgba(0,0,0,.04), 0 10px 24px rgba(109,40,217,.10);
    --shadow-md: 0 1px 0 rgba(0,0,0,.04), 0 18px 45px rgba(2,6,23,.10), 0 0 0 1px rgba(148,163,184,.35);
    --shadow-lg: 0 1px 0 rgba(0,0,0,.04), 0 26px 70px rgba(2,6,23,.16), 0 0 36px rgba(109,40,217,.32);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 320ms cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;

    --color-card-border: rgba(148,163,184,.45);
    --color-glow: rgba(109,40,217,.55);
    --color-glow-strong: rgba(109,40,217,.75);
}

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

.post-card, .card, [class*="card"] { caret-color: var(--color-accent); accent-color: var(--color-accent); }

/* ========== 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); border-color: rgba(148,163,184,.40); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

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

/* 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 10px 30px rgba(2,6,23,.12), 0 0 18px rgba(109,40,217,.25); }

/* cta: card-style */
.cta-inner { background: radial-gradient(1200px 300px at 50% 0%, rgba(109,40,217,.16), rgba(109,40,217,0) 60%), linear-gradient(180deg, rgba(248,250,252,1), rgba(241,245,249,1)); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 0 1px 0 rgba(0,0,0,.03), 0 30px 90px rgba(2,6,23,.14), 0 0 44px rgba(109,40,217,.20); border: 1px solid rgba(148,163,184,.35); }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 28px 80px rgba(2,6,23,.18), 0 0 44px rgba(109,40,217,.42), 0 0 0 1px rgba(109,40,217,.35); animation: glowPulse 1.3s ease-in-out infinite; border-color: rgba(109,40,217,.55); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px rgba(109,40,217,.35); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(900px 380px at 20% 10%, rgba(109,40,217,.35), rgba(109,40,217,0) 62%), radial-gradient(700px 360px at 85% 30%, rgba(14,165,233,.18), rgba(14,165,233,0) 60%), linear-gradient(135deg, #334155, #0b1220); }
.card { border-left: 3px solid rgba(109,40,217,.95); border-top-left-radius: calc(var(--radius-lg) - 2px); border-bottom-left-radius: calc(var(--radius-lg) - 2px); box-shadow: 0 1px 0 rgba(0,0,0,.03), 0 18px 45px rgba(2,6,23,.10), 0 0 0 1px rgba(148,163,184,.30); }
header, .header, .navbar { box-shadow: 0 6px 20px rgba(2,6,23,.10), 0 0 26px rgba(109,40,217,.14); background: rgba(248,250,252,.75); backdrop-filter: blur(10px) saturate(130%); -webkit-backdrop-filter: blur(10px) saturate(130%); border-bottom: 1px solid rgba(148,163,184,.30); }

@keyframes glowPulse {
    0%, 100% { filter: saturate(1.02); }
    50% { filter: saturate(1.08) drop-shadow(0 0 28px rgba(109,40,217,.35)); }
}

/* 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; }
}