/* CSSVariantEngine v3.0 — duobaodianjing.sc.cn */
/* Palette: slate-blue | Radius: soft | Shadow: multi-layer gradient */
/* Spacing: dense | Transition: smooth long */
/* Section layouts: {"news":"grid-4","features":"grid-3","hero":"overlay","testimonials":"masonry","partners":"centered","faq":"two-column","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --color-text: #f1f5f9;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 16px;
    --shadow-sm: 0 2px 8px rgba(30,41,59,0.12);
    --shadow-md: 0 4px 12px rgba(30,41,59,0.15), 0 2px 6px rgba(59,130,246,0.08);
    --shadow-lg: 0 8px 24px rgba(30,41,59,0.2), 0 4px 12px rgba(59,130,246,0.12), 0 2px 4px rgba(0,0,0,0.05);
    --space-section: 3.2rem;
    --space-card: 1rem;
    --space-gap: 0.8rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 60%, #334155 100%);
    min-height: 100vh;
}
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: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    color: #1e293b;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: 2px solid transparent;
    border-image: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%) 1;
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition); 
}

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

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 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; 
    background: linear-gradient(120deg, rgba(30,41,59,0.95) 0%, rgba(51,65,85,0.9) 100%);
}
.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: 2rem; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* 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: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; padding-inline: 0.75rem; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-3px); 
    box-shadow: var(--shadow-lg);
    background: linear-gradient(145deg, #ffffff 0%, #eff6ff 100%);
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-primary), 0.3); }
.card { 
    border-left: 3px solid;
    border-image: linear-gradient(180deg, #3b82f6 0%, #60a5fa 100%) 1;
}

/* 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; }
}