/* CSSVariantEngine v3.0 — about4-xingkongtiyu.com.cn */
/* Palette: indigo-cyan | Radius: mosaic-glow | Shadow: layered-glow */
/* Spacing: airy | Transition: smooth-spring */
/* Section layouts: {"news":"masonry-2","features":"horizontal","hero":"overlay","testimonials":"masonry","partners":"grid-6","faq":"two-column","stats":"grid-3","cta":"full-bg"} */

:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #312e81;
    --color-accent: #06b6d4;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 79,70,229;
    --rgb-accent: 6,182,212;
    --card-accent: var(--color-accent);
    --rgb-card-accent: var(--rgb-accent);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 0 0 1px rgba(var(--rgb-accent), .06);
    --shadow-md: 0 0 0 1px rgba(var(--rgb-accent), .12), 0 0 24px rgba(var(--rgb-accent), .22), 0 16px 32px -18px rgba(15,23,42,.35);
    --shadow-lg: 0 0 0 1px rgba(var(--rgb-accent), .18), 0 0 36px rgba(var(--rgb-accent), .32), 0 24px 48px -20px rgba(15,23,42,.45);
    --space-section: 3.6rem;
    --space-card: 1.5rem;
    --space-gap: 1.2rem;
    --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
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: 0 0 0 1px rgba(var(--rgb-card-accent, var(--rgb-accent)), .12), 0 0 24px rgba(var(--rgb-card-accent, var(--rgb-accent)), .22), 0 16px 32px -18px rgba(15,23,42,.35); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { --card-accent: #6366f1; --rgb-card-accent: 99,102,241; column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { --card-accent: #ec4899; --rgb-card-accent: 236,72,153; display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { --card-accent: #06b6d4; --rgb-card-accent: 6,182,212; position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }

/* testimonials: masonry */
.testimonial-list { --card-accent: #f59e0b; --rgb-card-accent: 245,158,11; column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-6 */
.partner-grid { --card-accent: #10b981; --rgb-card-accent: 16,185,129; display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: two-column */
.faq-list { --card-accent: #8b5cf6; --rgb-card-accent: 139,92,246; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-3 */
.stats-grid { --card-accent: #f97316; --rgb-card-accent: 249,115,22; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { --card-accent: #f97316; --rgb-card-accent: 249,115,22; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #f8fafc; padding: 4rem 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); }
header, .header, .navbar { background: rgba(248,250,252,0.82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }

/* 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: 2.4rem; --space-card: 1.2rem; --space-gap: 0.9rem; }
    .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; }
}