:/* CSSVariantEngine v3.0 — index-yl-kaiyun.com */
/* Palette: slate-blue | Radius: sharp | Shadow: layered */
/* Spacing: compact | Transition: snappy */
/* Section layouts: {"news":"grid-3","features":"centered","hero":"overlay","testimonials":"carousel","partners":"grid-6","faq":"with-sidebar","stats":"grid-3","cta":"card-style"} */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-accent: #60a5fa;
    --color-surface: #e2e8f0;
    --color-text: #0f172a;
    --rgb-primary: 37,99,235;
    --rgb-accent: 96,165,250;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 2px 4px rgba(15,23,42,.1), 0 0 0 1px rgba(148,163,184,.08);
    --shadow-md: 0 4px 8px rgba(15,23,42,.12), 0 2px 4px rgba(15,23,42,.08), 0 0 0 1px rgba(148,163,184,.06);
    --shadow-lg: 0 8px 16px rgba(15,23,42,.14), 0 4px 8px rgba(15,23,42,.1), 0 0 0 1px rgba(148,163,184,.08);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); line-height: var(--body-line-height); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #f1f5f9; }
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); background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%); border: 1px solid rgba(148,163,184,.2); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 50%, #1e40af 100%); color: #f8fafc; box-shadow: 0 2px 4px rgba(37,99,235,.25), 0 0 0 1px rgba(37,99,235,.1); transition: var(--transition); }
a:not([class]) { color: #60a5fa; transition: var(--transition); text-shadow: 0 0 12px rgba(96,165,250,.3); }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background: radial-gradient(circle at 30% 50%, rgba(37,99,235,.3) 0%, transparent 60%), radial-gradient(circle at 70% 30%, rgba(96,165,250,.2) 0%, transparent 50%), linear-gradient(135deg, #0f172a 0%, #1e293b 100%); }
                .hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; background: linear-gradient(145deg, #ffffff 0%, #f1f5f9 100%); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }
.partner-grid > * { background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%); border-radius: var(--radius-md); padding: 1rem; box-shadow: 0 2px 4px rgba(15,23,42,.08), 0 0 0 1px rgba(148,163,184,.1); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper > * { background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-md); border: 1px solid rgba(148,163,184,.2); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > * { background: linear-gradient(145deg, #2563eb 0%, #1d4ed8 100%); border-radius: var(--radius-md); padding: 1.5rem; color: #ffffff; box-shadow: 0 4px 8px rgba(37,99,235,.3), 0 0 0 1px rgba(37,99,235,.2); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #1e40af 0%, #2563eb 50%, #3b82f6 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; color: #ffffff; box-shadow: 0 8px 16px rgba(37,99,235,.4), 0 0 0 1px rgba(96,165,250,.3); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: #93c5fd; text-shadow: 0 0 20px rgba(147,197,253,.6); }
.card { border: 1px solid rgba(148,163,184,.2); background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%); }
.card:hover { box-shadow: 0 8px 16px rgba(37,99,235,.2), 0 4px 8px rgba(15,23,42,.12), 0 0 0 1px rgba(37,99,235,.2); transform: translateY(-1px); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(15,23,42,.95) 0%, rgba(30,41,59,.9) 100%); backdrop-filter: blur(8px); }

/* 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; }
}