/* CSSVariantEngine v3.0 — douyoudianjing.org.cn */
/* Palette: bold asymmetric | Radius: large rounded | Shadow: multi-layer soft */
/* Spacing: mixed tight-loose | Transition: smooth ease */
/* Section layouts: {"news":"list-view","features":"grid-3","hero":"centered","testimonials":"masonry","partners":"grid-4","faq":"with-sidebar","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-accent: #ec4899;
    --color-surface: #f0f9ff;
    --color-text: #0c4a6e;
    --rgb-primary: 37, 99, 235;
    --rgb-accent: 236, 72, 153;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 8px rgba(15, 23, 42, 0.05), 0 20px 40px -10px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 6px 16px rgba(15, 23, 42, 0.07), 0 28px 56px -12px rgba(15, 23, 42, 0.16);
    --space-section: 4.8rem;
    --space-card: 1.9rem;
    --space-gap: 0.9rem;
    --transition: 0.4s ease;
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f8fafc; }
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: #ffffff; border: 1px solid #e2e8f0; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-primary); color: white; border: 2px solid var(--color-primary-dark); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-thickness: 2px; }

/* ========== 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; background-color: #fdf2f8; border-color: #fbcfe8; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list .card { background-color: #f0fdf4; border-color: #bbf7d0; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; color: white; text-shadow: 0 2px 12px rgba(0,0,0,0.15); }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }
.testimonial-list .card { background-color: #ecfeff; border-color: #a5f3fc; }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 3); align-items: center; }
.partner-grid .card { background-color: #fffbeb; border-color: #fde68a; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.5rem; }
.faq-wrapper .card { background-color: #faf5ff; border-color: #e9d5ff; }

/* 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); }
.stats-grid .card { background-color: #fef7ff; border-color: #fbcfe8; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #7c3aed, #6366f1); color: #fff; padding: 4rem 2rem; }
.cta-section .card { background-color: rgba(255,255,255,0.1); backdrop-filter: blur(8px); border-color: rgba(255,255,255,0.2); color: white; }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #2563eb, #7c3aed); }
.card { border-left: 4px solid var(--color-accent); }
header, .header, .navbar { background: rgba(255,255,255,0.9); backdrop-filter: blur(12px); border-bottom: 1px solid #e2e8f0; }

/* 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; }
}