/* CSSVariantEngine v3.0 — zh-jisudiangjing.net */
/* Palette: cool-slate-blue | Radius: soft-rounded | Shadow: multi-layer gradient-tinted */
/* Spacing: dense-compact | Transition: smooth-long 0.5s */
/* Section layouts: {"news":"grid-3","features":"grid-4","hero":"centered","testimonials":"masonry","partners":"grid-6","faq":"two-column","stats":"grid-4","cta":"full-bg"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: #1e293b;
    --color-text: #f1f5f9;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 2px 4px rgba(var(--rgb-primary), 0.1), 0 1px 2px rgba(30,41,59,0.2);
    --shadow-md: 0 4px 12px rgba(var(--rgb-primary), 0.15), 0 2px 6px rgba(30,41,59,0.25), 0 1px 3px rgba(30,41,59,0.1);
    --shadow-lg: 0 8px 24px rgba(var(--rgb-primary), 0.2), 0 4px 12px rgba(30,41,59,0.3), 0 2px 6px rgba(30,41,59,0.15);
    --space-section: 3rem;
    --space-card: 12px;
    --space-gap: 10px;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #1e293b 0%, #334155 100%);
    caret-color: var(--color-accent);
}
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;
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, #3b82f6, #60a5fa, #93c5fd) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, #3b82f6, #2563eb, #1d4ed8);
    color: #ffffff;
    border: none;
}
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 40%, #3b82f6 75%, #60a5fa 100%); 
    color: #fff; 
    padding: 4rem 2rem; 
    backdrop-filter: blur(8px);
}

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-6px); 
    box-shadow: 0 12px 32px rgba(var(--rgb-primary), 0.25), 0 6px 16px rgba(30,41,59,0.35); 
}
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #1e293b 0%, #334155 35%, #475569 70%, #1e293b 100%); 
}

/* 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: 1.5rem; --space-card: 8px; --space-gap: 0.5rem; }
    .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; }
}