/* CSSVariantEngine v3.0 — aisports-app.com.cn */
/* Palette: slate-dashboard | Radius: pillowy | Shadow: layered */
/* Spacing: compact | Transition: swift */
/* Section layouts: {"news":"grid-3","features":"centered","hero":"minimal","testimonials":"grid-3","partners":"grid-4","faq":"two-column","stats":"big-number","cta":"split"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-accent: #06b6d4;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --rgb-primary: 59,130,246;
    --rgb-accent: 6,182,212;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,0.06), 0 1px 3px rgba(15,23,42,0.08);
    --shadow-md: 0 8px 16px -6px rgba(15,23,42,0.08), 0 4px 8px -4px rgba(15,23,42,0.05), 0 16px 32px -12px rgba(59,130,246,0.14);
    --shadow-lg: 0 14px 24px -8px rgba(15,23,42,0.12), 0 6px 12px -6px rgba(15,23,42,0.08), 0 32px 56px -16px rgba(59,130,246,0.2);
    --space-section: 3.5rem;
    --space-card: 1.25rem;
    --space-gap: 1.125rem;
    --transition: 0.25s cubic-bezier(0.25, 1, 0.5, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f1f5f9; background-image: radial-gradient(1000px 600px at 85% -10%, rgba(59,130,246,0.08), transparent 60%), radial-gradient(800px 500px at -10% 110%, rgba(6,182,212,0.06), transparent 55%); accent-color: var(--color-primary); caret-color: var(--color-primary); }
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: inset 0 0 0 1px rgba(226,232,240,0.7), var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: var(--color-surface); background-image: linear-gradient(180deg, #ffffff, #f8fafc); }
.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); text-decoration-color: rgba(59,130,246,0.35); text-underline-offset: 3px; }

/* ========== 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: minimal */
.hero { padding: 1.75rem 0; background: radial-gradient(900px 420px at 75% -20%, rgba(59,130,246,0.12), transparent 65%), rgba(255,255,255,0.35); border-radius: var(--radius-xl); } .hero-content { max-width: 560px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.75rem; }
.stats-grid .stat-value { font-size: 3rem; color: var(--color-primary); text-shadow: 0 8px 24px rgba(59,130,246,0.25); }

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

/* 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); text-shadow: 0 2px 12px rgba(6,182,212,0.35); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(248,250,252,0.88), rgba(248,250,252,0.45)); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 0 rgba(226,232,240,0.7); }

/* 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: 1.75rem; --space-card: 0.875rem; --space-gap: 0.625rem; }
    .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; }
}