/* CSSVariantEngine v3.0 — centered-stage */
/* Palette: dark stage #0f0f1a, violet + gold | Radius: generous | Shadow: layered */
/* Spacing: comfortable | Transition: smooth */
/* Section layouts: {"news":"grid-4","features":"grid-2","hero":"split","testimonials":"carousel","partners":"centered","faq":"with-sidebar","stats":"big-number","cta":"centered"} */

:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #6d28d9;
    --color-accent: #f59e0b;
    --color-surface: #faf9ff;
    --color-text: #1e0f3c;
    --rgb-primary: 139,92,246;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(15,15,26,0.12), 0 1px 2px rgba(15,15,26,0.08);
    --shadow-md: 0 12px 32px rgba(76,29,149,0.14), 0 5px 12px rgba(15,15,26,0.10), 0 1px 3px rgba(15,15,26,0.06);
    --shadow-lg: 0 32px 64px rgba(76,29,149,0.20), 0 16px 32px rgba(15,15,26,0.12), 0 4px 8px rgba(15,15,26,0.08);
    --space-section: 4.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(ellipse 100% 55% at 50% 0%, rgba(139,92,246,0.20) 0%, rgba(15,15,26,0) 100%), #0f0f1a; }
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, #faf9ff 0%, #f3efff 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: 0 0 0 1px rgba(139,92,246,0.16), var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, #faf9ff 50%, #efeaff 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; box-shadow: 0 10px 28px rgba(139,92,246,0.35), 0 3px 8px rgba(15,15,26,0.18); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

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

/* hero: split */
/* 左文右图 */
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* 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; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(circle at 50% -10%, rgba(245,158,11,0.30) 0%, rgba(139,92,246,0.22) 30%, rgba(30,15,60,0) 68%), linear-gradient(135deg, #2e1065 0%, #4c1d95 45%, #0f0f1a 100%); }
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { box-shadow: 0 1px 0 rgba(139,92,246,0.25), 0 12px 40px rgba(15,15,26,0.12); background: rgba(250,249,255,0.82); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }

/* 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; }
}