/* CSSVariantEngine v3.0 — zh-lecai.org.cn */
/* Palette: cool-slate-blue | Radius: soft-dense | Shadow: multi-layer gradient | Spacing: tight-compact | Transition: smooth-long */
/* Section layouts: {"news":"list-view","features":"grid-3","hero":"split","testimonials":"carousel","partners":"centered","faq":"single-column","stats":"grid-4","cta":"card-style"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 4px;
    --radius-md: 7px;
    --radius-lg: 11px;
    --radius-xl: 15px;
    --shadow-sm: 0 1px 3px rgba(30,41,59,0.1), 0 1px 2px rgba(30,41,59,0.06);
    --shadow-md: 0 4px 6px -1px rgba(30,41,59,0.1), 0 2px 4px -1px rgba(30,41,59,0.06), 0 10px 15px -3px rgba(30,41,59,0.08);
    --shadow-lg: 0 10px 15px -3px rgba(30,41,59,0.12), 0 4px 6px -2px rgba(30,41,59,0.06), 0 25px 50px -12px rgba(59, 130, 246, 0.15);
    --space-section: 2rem;
    --space-card: 0.875rem;
    --space-gap: 0.875rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(145deg, #1e293b 0%, #334155 60%, #475569 100%); }
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(180deg, #ffffff 0%, #f8fafc 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-image: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: white; border: 0; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

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

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #3b82f6 0%, #2563eb 45%, #1d4ed8 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; color: #ffffff; box-shadow: 0 10px 40px rgba(var(--rgb-primary), 0.3); }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card { border-left: 3px solid; border-image: linear-gradient(to bottom, #3b82f6, #60a5fa, #93c5fd) 1; }
header, .header, .navbar { box-shadow: 0 2px 8px rgba(30,41,59,0.08), 0 1px 3px rgba(30,41,59,0.12); background: linear-gradient(90deg, #f8fafc 0%, #ffffff 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: 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; }
}