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

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-accent: #f97316;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 37, 99, 235;
    --rgb-accent: 249, 115, 22;
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 4px 8px rgba(15, 23, 42, 0.05), 0 12px 24px -6px rgba(15, 23, 42, 0.08);
    --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 12px rgba(15, 23, 42, 0.04), 0 24px 48px -12px rgba(15, 23, 42, 0.1);
    --space-section: 3.2rem;
    --space-card: 1.4rem;
    --space-gap: 1.1rem;
    --transition: 0.4s ease;
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f1f5f9; }
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 rgba(var(--rgb-primary), 0.15); }
.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); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; background-color: #eff6ff; border: 1px solid rgba(var(--rgb-primary), 0.2); }

/* 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; }
.hero-section { background-color: #dbeafe; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-section { background-color: #fff7ed; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 24s linear infinite; }
                .partner-section { background-color: #f0fdf4; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* 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-section { background-color: #fef2f2; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%); color: #fff; padding: 4rem 2rem; border-top: 4px solid var(--color-accent); }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
header, .header, .navbar { box-shadow: 0 4px 8px rgba(15, 23, 42, 0.05), 0 10px 24px -8px rgba(15, 23, 42, 0.09); background-color: #ffffff; border-bottom: 1px solid rgba(var(--rgb-primary), 0.1); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.btn:hover { background-color: var(--color-accent); border-color: #ea580c; }

/* 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; }
}