/* CSSVariantEngine v3.0 — centered-stage | soft-shadows */
/* Palette: dark-stage + gold | Radius: large | Shadow: soft multi-layer */
:root {
    --color-bg: #0f0f1a;
    --color-primary: #7c3aed;
    --color-primary-dark: #2e1065;
    --color-accent: #d4af37;
    --color-accent-dark: #8a6a1d;
    --color-surface: #f8f7fc;
    --color-text: #e9e6f5;
    --color-text-inverse: #1c1830;
    --rgb-primary: 124,58,237;
    --rgb-accent: 212,175,55;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(15,15,26,0.08), 0 12px 24px -8px rgba(15,15,26,0.12);
    --shadow-md: 0 4px 12px rgba(15,15,26,0.06), 0 24px 48px -12px rgba(15,15,26,0.18);
    --shadow-lg: 0 8px 24px rgba(15,15,26,0.08), 0 40px 80px -20px rgba(15,15,26,0.24);
    --space-section: 3.5rem;
    --space-card: 1.5rem;
    --space-gap: 1.1rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
    background-color: var(--color-bg);
    accent-color: var(--color-accent);
    caret-color: var(--color-accent);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(ellipse 70% 50% at 50% -10%, rgba(124,58,237,0.22), transparent 70%),
        radial-gradient(ellipse 50% 40% at 50% 110%, rgba(212,175,55,0.12), transparent 70%),
        var(--color-bg);
}
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);
    background: var(--color-surface);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(212,175,55,0.07);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    text-decoration-color: rgba(212,175,55,0.6);
    text-shadow: 0 0 18px rgba(124,58,237,0.28);
    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: centered */
/* 居中大卡片 */
.feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
.hero-content { position: relative; z-index: 1; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.25rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.25rem; }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.25rem; }
.stats-grid .stat-value { font-size: 3rem; }

/* cta: full-bg */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    padding: 4.5rem 2rem;
    box-shadow: var(--shadow-lg);
}

/* Page Layout: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
header, .header, .navbar {
    background: rgba(15,15,26,0.72);
    backdrop-filter: blur(16px);
    color: var(--color-text);
    box-shadow: 0 1px 2px rgba(15,15,26,0.05), 0 16px 40px -16px rgba(15,15,26,0.28);
}

/* 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: 2.25rem; --space-card: 1.1rem; --space-gap: 0.85rem; }
    .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; }
}