/* CSSVariantEngine v3.0 — pc7-ai-sports.com.cn */
/* Palette: violet-coral | Radius: rounded | Shadow: soft */
/* Spacing: balanced | Transition: smooth */
/* Section layouts: {"news":"grid-3","features":"horizontal","hero":"left-aligned","testimonials":"grid-3","partners":"centered","faq":"single-column","stats":"grid-3","cta":"split"} */

:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #f43f6b;
    --color-surface: #f6f5f2;
    --color-text: #2e2a32;
    --rgb-primary: 109,40,217;
    --rgb-accent: 244,63,107;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 6px rgba(0,0,0,0.04), 0 6px 12px -4px rgba(var(--rgb-primary),0.08);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(var(--rgb-primary),0.10);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.06), 0 30px 60px -12px rgba(var(--rgb-primary),0.14);
    --space-section: 3.5rem;
    --space-card: 1.375rem;
    --space-gap: 1.125rem;
    --transition: 0.4s cubic-bezier(0.25, 1, 0.5, 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: var(--card-shadow, var(--shadow-md));
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(135deg, var(--card-accent, #ffffff), var(--card-accent-dark, #ffffff));
    color: var(--card-text, var(--color-text));
}
.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: grid-3 */
/* 三列等宽网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    --card-accent: #e84855;
    --card-accent-dark: #c93a4a;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(232,72,85,0.28);
}

/* features: horizontal */
/* 水平滚动 */
.feature-list {
    display: flex;
    gap: var(--space-gap);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    --card-accent: #0d9488;
    --card-accent-dark: #0f766e;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(13,148,136,0.28);
}
.feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* 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);
    --card-accent: #d97706;
    --card-accent-dark: #b45309;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(217,119,6,0.28);
}

/* partners: centered */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.75rem;
    --card-accent: #059669;
    --card-accent-dark: #047857;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(5,150,102,0.28);
}

/* faq: single-column */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    --card-accent: #e11d48;
    --card-accent-dark: #be123c;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(225,29,72,0.28);
}

/* stats: grid-3 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    text-align: center;
    --card-accent: #7c3aed;
    --card-accent-dark: #5b21b6;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(124,58,237,0.28);
}

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1.75rem;
    --card-accent: #ea580c;
    --card-accent-dark: #c2410c;
    --card-text: #ffffff;
    --card-shadow: 0 4px 8px rgba(0,0,0,0.05), 0 20px 40px -10px rgba(234,88,12,0.28);
}

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

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #6d28d9, #e11d48); }
.card { border-left: 3px solid rgba(255,255,255,0.35); }

/* 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: 2.25rem; --space-card: 1.125rem; --space-gap: 0.875rem; }
    .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; }
}