/* CSSVariantEngine v3.0 — zh-lecai.cn */
/* Palette: dense-dashboard | Radius: medium | Shadow: glow-effects */
/* Spacing: compact | Transition: snappy */
/* Section layouts: {"news":"featured-top","features":"grid-4","hero":"overlay","testimonials":"grid-3","partners":"centered","faq":"with-sidebar","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: #1e293b;
    --color-text: #f8fafc;
    --rgb-primary: 59, 130, 246;
    --rgb-accent: 96, 165, 251;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 0 8px rgba(var(--rgb-primary), 0.15);
    --shadow-md: 0 0 16px rgba(var(--rgb-primary), 0.25);
    --shadow-lg: 0 0 24px rgba(var(--rgb-primary), 0.4);
    --space-section: 3.5rem;
    --space-card: 1rem;
    --space-gap: 0.875rem;
    --transition: 0.3s ease-out;
    --heading-weight: 800;
    --body-line-height: 1.6;
}

@keyframes subtle-pulse {
    0%, 100% {
        box-shadow: var(--shadow-md);
    }
    50% {
        box-shadow: var(--shadow-lg);
    }
}

/* 基础覆盖 */
body { 
    background-color: var(--color-surface);
    color: var(--color-text); 
    line-height: var(--body-line-height); 
}
h1, h2, h3, h4 { 
    font-weight: var(--heading-weight); 
}
section, .section { 
    padding-top: var(--space-section); 
    padding-bottom: var(--space-section); 
}
.card, [class*="card"] { 
    background-color: #ffffff;
    color: #1e293b;
    border-radius: var(--radius-lg); 
    box-shadow: var(--shadow-sm); 
    padding: var(--space-card); 
    transition: var(--transition); 
}
.card:hover, [class*="card"]:hover {
    box-shadow: 0 0 32px rgba(var(--rgb-primary), 0.6);
    transform: translateY(-2px);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background-color: var(--color-primary);
    color: white;
    border: none;
    animation: subtle-pulse 3s infinite ease-in-out;
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: 0 0 32px rgba(var(--rgb-primary), 0.7);
}
a:not([class]) { 
    color: var(--color-accent); 
    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; }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.6rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 1.6rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* 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: 100%; margin: 0 auto; padding: 0 1rem; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-primary); }
.card { border-left: 3px solid var(--color-primary); }

/* 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: 0.8rem; --space-gap: 0.6rem; }
    .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; }
}