/* CSSVariantEngine v3.0 — btysports-app4.com.cn */
/* Palette: mosaic-jewel | Radius: tight | Shadow: layered */
/* Spacing: compact | Transition: snappy */
/* Section layouts: {"news":"featured-top","features":"grid-4","hero":"centered","testimonials":"grid-3","partners":"grid-6","faq":"two-column","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #3730a3;
    --color-accent: #f59e0b;
    --color-surface: #ffffff;
    --color-bg: #f4f6f9;
    --color-text: #1e293b;
    --rgb-primary: 79,70,229;
    --rgb-accent: 245,158,11;
    --rgb-card-accent: 79,70,229;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 2px rgba(30,27,75,.08), 0 1px 3px rgba(30,27,75,.05);
    --shadow-md: 0 2px 4px rgba(30,27,75,.06), 0 4px 12px rgba(30,27,75,.05);
    --shadow-lg: 0 4px 8px rgba(30,27,75,.08), 0 8px 24px rgba(30,27,75,.06);
    --space-section: 4rem;
    --space-card: 1.75rem;
    --space-gap: 1.25rem;
    --transition: 0.18s cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); background: var(--color-bg); line-height: var(--body-line-height); }
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 2px 6px rgba(var(--rgb-card-accent), .16), 0 1px 2px rgba(var(--rgb-card-accent), .08); padding: var(--space-card); transition: var(--transition); background: linear-gradient(165deg, rgba(var(--rgb-card-accent), .12), rgba(var(--rgb-card-accent), .03) 55%), var(--color-surface); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); text-decoration-color: rgba(var(--rgb-primary), .35); 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); --rgb-card-accent: 14,165,233; }
.news-grid > *:first-child { grid-column: span 3; box-shadow: 0 6px 12px rgba(var(--rgb-card-accent), .22), 0 16px 40px rgba(var(--rgb-card-accent), .16); }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); --rgb-card-accent: 139,92,246; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; --rgb-card-accent: 8,145,178; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); --rgb-card-accent: 236,72,153; }

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

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); --rgb-card-accent: 245,158,11; }

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; --rgb-card-accent: 20,184,166; }

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-card-accent), .14); border-top-color: rgba(var(--rgb-card-accent), .45); }
header, .header, .navbar { background: rgba(255,255,255,.72); backdrop-filter: blur(14px) saturate(1.5); -webkit-backdrop-filter: blur(14px) saturate(1.5); }

/* 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; }
}