:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #c084fc;
    --color-surface: #0f0f1a;
    --color-text: #e9e4f5;
    --rgb-primary: 124,58,237;
    --rgb-accent: 192,132,252;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(76,29,149,.18), 0 1px 2px rgba(124,58,237,.12);
    --shadow-md: 0 8px 24px rgba(76,29,149,.28), 0 3px 8px rgba(124,58,237,.18), 0 0 0 1px rgba(192,132,252,.08);
    --shadow-lg: 0 16px 48px rgba(76,29,149,.36), 0 6px 16px rgba(124,58,237,.24), 0 0 0 1px rgba(192,132,252,.12);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(160deg, #0f0f1a 0%, #1a1030 45%, #0f0f1a 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(120deg, #e9e4f5 0%, #c084fc 60%, #a78bfa 100%); -webkit-background-clip: text; background-clip: text; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,.10) 0%, rgba(15,15,26,0) 70%); }
.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(30,20,60,.85) 0%, rgba(20,15,40,.95) 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #c084fc 100%); color: #faf5ff; box-shadow: 0 4px 16px rgba(124,58,237,.35), 0 1px 3px rgba(76,29,149,.4); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; background: linear-gradient(135deg, rgba(124,58,237,.12) 0%, rgba(192,132,252,.05) 50%, rgba(15,15,26,0) 100%); border-radius: var(--radius-xl); box-shadow: 0 20px 60px rgba(76,29,149,.3); }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* 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; background: linear-gradient(135deg, #c084fc 0%, #7c3aed 50%, #a855f7 100%); -webkit-background-clip: text; background-clip: text; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(120deg, rgba(124,58,237,.18) 0%, rgba(192,132,252,.08) 50%, rgba(76,29,149,.15) 100%); border-radius: var(--radius-xl); box-shadow: 0 16px 48px rgba(76,29,149,.32), inset 0 1px 0 rgba(192,132,252,.15); }

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-accent), .15); }

/* 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; }
}