:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #5b21b6;
    --color-accent: #f59e0b;
    --color-surface: #fdfbff;
    --color-text: #18181b;
    --rgb-primary: 139,92,246;
    --rgb-accent: 245,158,11;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 2px 6px rgba(139,92,246,0.10), 0 1px 2px rgba(24,24,27,0.06);
    --shadow-md: 0 8px 24px rgba(139,92,246,0.14), 0 3px 8px rgba(236,72,153,0.10), 0 1px 3px rgba(24,24,27,0.06);
    --shadow-lg: 0 16px 48px rgba(76,29,149,0.20), 0 8px 20px rgba(219,39,119,0.14), 0 3px 8px rgba(24,24,27,0.08);
    --space-section: 6rem;
    --space-card: 2.25rem;
    --space-gap: 1.35rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 15% 20%, rgba(139,92,246,0.10), transparent 32%),
        radial-gradient(circle at 85% 75%, rgba(236,72,153,0.08), transparent 40%),
        linear-gradient(180deg, #fdfbff 0%, #f5f3ff 50%, #fdfbff 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: linear-gradient(180deg, rgba(253,251,255,0.86), rgba(245,243,255,0.94));
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, rgba(255,255,255,0.94), rgba(245,243,255,0.84));
    color: var(--color-text);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #8b5cf6 0%, #d946ef 55%, #ec4899 100%);
    color: #fdfbff;
    box-shadow: var(--shadow-sm);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
}

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

/* news: list-view */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); background: linear-gradient(120deg, rgba(139,92,246,0.08), rgba(245,158,11,0.03)); border-radius: var(--radius-xl); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); background: linear-gradient(135deg, #ede9fe 0%, #fae8ff 35%, #fce7f3 70%, #fef3c7 100%); border-radius: var(--radius-xl); }

/* hero: split */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2.25rem; align-items: center; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; background: linear-gradient(90deg, rgba(139,92,246,0.06), rgba(245,158,11,0.05), rgba(236,72,153,0.06)); border-radius: var(--radius-xl); } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2.4rem; overflow: hidden; animation: partnerScroll 20s linear infinite; background: linear-gradient(90deg, rgba(30,27,75,0.04), rgba(139,92,246,0.06), rgba(245,158,11,0.04)); border-radius: var(--radius-lg); }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); background: linear-gradient(145deg, #eef2ff 0%, #f5f3ff 45%, #fdf4ff 100%); border-radius: var(--radius-xl); }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; background: linear-gradient(135deg, #1e1b4b 0%, #312e81 25%, #4c1d95 55%, #7c3aed 100%); color: #fdfbff; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2.4rem; background: linear-gradient(135deg, #fef3c7 0%, #fde68a 45%, #f59e0b 80%, #fbbf24 100%); color: #18181b; border-radius: var(--radius-xl); box-shadow: var(--shadow-md); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-image-source: linear-gradient(135deg, #f59e0b, #ec4899, #8b5cf6); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 2px 10px rgba(245,158,11,0.45); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(circle at 20% 30%, rgba(245,158,11,0.22), transparent 42%), radial-gradient(circle at 80% 20%, rgba(236,72,153,0.32), transparent 46%), linear-gradient(135deg, #1e1b4b 0%, #312e81 20%, #4c1d95 44%, #7c3aed 66%, #db2777 84%, #f59e0b 100%); color: #fdfbff; }
.card { border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(139,92,246,0.65), rgba(236,72,153,0.55), rgba(245,158,11,0.65)) 1; }
header, .header, .navbar { background: linear-gradient(180deg, rgba(253,251,255,0.82), rgba(245,243,255,0.58)); backdrop-filter: blur(12px); -webkit-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; }
}