:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #fbbf24;
    --color-surface: #0f0f1a;
    --color-text: #e9e5ff;
    --rgb-primary: 124,58,237;
    --rgb-accent: 251,191,36;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary),.22), 0 1px 3px rgba(15,15,26,.45);
    --shadow-md: 0 6px 24px rgba(var(--rgb-primary),.28), 0 2px 8px rgba(var(--rgb-accent),.10);
    --shadow-lg: 0 16px 48px rgba(var(--rgb-primary),.35), 0 4px 16px rgba(15,15,26,.55), 0 0 0 1px rgba(var(--rgb-accent),.06);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(ellipse at 50% 0%, #1a1030 0%, #0f0f1a 45%, #0a0a14 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #f5f0ff; text-shadow: 0 2px 18px rgba(var(--rgb-primary),.35); }
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: linear-gradient(160deg, rgba(124,58,237,.14) 0%, rgba(15,15,26,.92) 55%, rgba(251,191,36,.05) 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #7c3aed 0%, #a855f7 45%, #fbbf24 100%); color: #0f0f1a; box-shadow: 0 4px 18px rgba(var(--rgb-primary),.4), 0 0 0 1px rgba(var(--rgb-accent),.25); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-shadow: 0 0 12px rgba(var(--rgb-accent),.3); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

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

/* hero: minimal */
.hero { padding: 2rem 0; background: radial-gradient(circle at 50% 30%, rgba(124,58,237,.22) 0%, rgba(15,15,26,0) 70%); } .hero-content { max-width: 560px; margin: 0 auto; text-align: center; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 40%, #a855f7 70%, #fbbf24 100%); color: #0f0f1a; padding: 4rem 2rem; box-shadow: inset 0 0 80px rgba(251,191,36,.12), 0 20px 60px rgba(76,29,149,.5); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-accent), .18); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(15,15,26,.95) 0%, rgba(15,15,26,0) 100%); backdrop-filter: blur(8px); }

/* 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; }
}