/* CSSVariantEngine v3.0 — play4-aitiyu-sports.com.cn */
/* Palette: mosaic-teal-amber | Radius: tight-rounded | Shadow: layered-mosaic */
/* Spacing: tight | Transition: quick */
/* Section layouts: {"news":"featured-left","features":"grid-3","hero":"left-aligned","testimonials":"grid-3","partners":"scroll","faq":"single-column","stats":"grid-3","cta":"split"} */

:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #f59e0b;
    --color-surface: #f1f5f9;
    --color-text: #0f172a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 245,158,11;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,.08), 0 0 0 1px rgba(15,23,42,.04);
    --shadow-md: 0 2px 4px rgba(15,23,42,.06), 0 8px 16px rgba(15,23,42,.08), 0 0 0 1px rgba(15,23,42,.03);
    --shadow-lg: 0 4px 8px rgba(15,23,42,.06), 0 16px 32px rgba(15,23,42,.08), 0 0 0 1px rgba(15,23,42,.04);
    --space-section: 1.8rem;
    --space-card: 0.875rem;
    --space-gap: 0.7rem;
    --transition: 120ms cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 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: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
.news-grid > *:first-child { grid-row: span 2; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

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

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 1.75rem; overflow: hidden; animation: partnerScroll 28s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

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

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1.75rem; }

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

/* 条件性装饰 */
.card {
    border-left: 3px solid var(--color-accent);
    background-color: #ffffff;
    background-image: linear-gradient(135deg, rgba(var(--rgb-primary), .06), rgba(var(--rgb-accent), .04));
}
header, .header, .navbar { background: rgba(255,255,255,.72); backdrop-filter: blur(8px); -webkit-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: 1.6rem; --space-card: 0.8rem; --space-gap: 0.6rem; }
    .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; }
}