/* CSSVariantEngine v3.0 — lhzige.com */
/* Palette: dense-dashboard | Radius: soft-compact | Shadow: multi-layer blue-tinted */
/* Spacing: tight-dense | Transition: smooth-long */
/* Section layouts: {"news":"featured-top","features":"grid-3","hero":"left-aligned","testimonials":"grid-3","partners":"grid-4","faq":"two-column","stats":"grid-3","cta":"split"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #0ea5e9;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 59, 130, 246;
    --rgb-accent: 14, 165, 233;
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow-sm: 0 1px 6px rgba(30, 41, 59, 0.15), 0 0 2px rgba(59, 130, 246, 0.08);
    --shadow-md: 0 3px 12px rgba(30, 41, 59, 0.18), 0 1px 4px rgba(59, 130, 246, 0.1);
    --shadow-lg: 0 6px 24px rgba(30, 41, 59, 0.22), 0 2px 8px rgba(59, 130, 246, 0.12);
    --space-section: 1.75rem;
    --space-card: 12px;
    --space-gap: 10px;
    --transition: 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #1e293b 0%, #334155 50%, #475669 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%, #f1f5f9 100%);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    border: 1px solid rgba(255,255,255,0.2);
}
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; }

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

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* 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: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* 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); text-shadow: 0 0 6px rgba(var(--rgb-accent), 0.3); }
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 35%, #1d4ed8 70%, #0ea5e9 100%);
    color: white;
}
.card { 
    border-left: 3px solid; 
    border-image: linear-gradient(180deg, #3b82f6 0%, #0ea5e9 50%, #60a5fa 100%) 1; 
}
header, .header, .navbar { 
    background: linear-gradient(to right, rgba(30, 41, 59, 0.9), rgba(51, 65, 85, 0.9));
    backdrop-filter: blur(10px);
}

/* 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; }
}