/* CSSVariantEngine v3.0 — centered-stage */
/* Palette: spotlight | Radius: rounded | Shadow: soft */
/* Spacing: generous | Transition: smooth */
/* Section layouts: {"news":"featured-left","features":"grid-3","hero":"centered","testimonials":"grid-3","partners":"grid-4","faq":"with-sidebar","stats":"big-number","cta":"split"} */

:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #6d28d9;
    --color-accent: #d4af37;
    --color-surface: #fdfcf8;
    --color-text: #eeeaf6;
    --color-card-text: #1c1730;
    --color-stage: #0f0f1a;
    --rgb-primary: 139,92,246;
    --rgb-accent: 212,175,55;
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(15,15,26,0.05), 0 8px 16px -4px rgba(15,15,26,0.08);
    --shadow-md: 0 4px 12px rgba(15,15,26,0.05), 0 24px 48px -12px rgba(15,15,26,0.14);
    --shadow-lg: 0 8px 20px rgba(15,15,26,0.06), 0 36px 72px -16px rgba(15,15,26,0.22);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.4rem;
    --transition: 0.4s 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 at 50% -10%, #2a2145 0%, var(--color-stage) 55%, #0a0a14 100%);
}
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: var(--transition);
    background-color: var(--color-surface);
    color: var(--color-card-text);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #ffffff;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.15), 0 4px 12px rgba(139,92,246,0.25), 0 12px 24px -8px rgba(15,15,26,0.2);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
.news-grid > *:first-child { grid-row: span 2; }

/* 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: 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: 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; color: var(--color-primary); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* 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 0 0 1px rgba(212,175,55,0.2), var(--shadow-lg);
    border-color: rgba(var(--rgb-accent), .35);
}
a:not([class]):hover { color: var(--color-accent); }
.card { border: 1px solid rgba(var(--rgb-accent), .14); }
header, .header, .navbar { box-shadow: 0 1px 0 rgba(212,175,55,0.12), 0 8px 24px -12px rgba(15,15,26,0.6); }

/* 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; }
}