/* CSSVariantEngine v3.0 — sh-qiutansports.com.cn */
/* Palette: sidebar-classic | Radius: medium | Shadow: glow-effects */
/* Spacing: moderate | Transition: smooth */
/* Section layouts: {"news":"grid-4","features":"grid-4","hero":"centered","testimonials":"grid-3","partners":"centered","faq":"with-sidebar","stats":"big-number","cta":"full-bg"} */

@keyframes subtle-pulse {
    0%, 100% { box-shadow: 0 0 24px rgba(var(--rgb-accent), 0.4); }
    50% { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6); }
}

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-accent: #38bdf8;
    --color-surface: #f8fafc;
    --color-sidebar: #252e3a;
    --color-text: #1e293b;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 56, 189, 248;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 2px 4px rgba(var(--rgb-primary), 0.08);
    --shadow-md: 0 4px 12px rgba(var(--rgb-primary), 0.12), 0 0 24px rgba(var(--rgb-accent), 0.25);
    --shadow-lg: 0 8px 24px rgba(var(--rgb-primary), 0.18), 0 0 24px rgba(var(--rgb-accent), 0.4);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: 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: #ffffff; border: 1px solid rgba(var(--rgb-accent), 0.1); }
.card:hover, [class*="card"]:hover { box-shadow: 0 8px 28px rgba(var(--rgb-primary), 0.22), 0 0 32px rgba(var(--rgb-accent), 0.6); transform: translateY(-2px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: var(--color-primary); color: #ffffff; border: none; box-shadow: 0 0 24px rgba(var(--rgb-accent), 0.4); animation: subtle-pulse 3s infinite ease-in-out; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.7); background: var(--color-primary-dark); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-primary-dark); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.4); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

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

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.faq-wrapper > aside { background-color: var(--color-sidebar); color: #f1f5f9; border-radius: var(--radius-lg); padding: 1.5rem; }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.stats-grid .stat-value { font-size: 3rem; color: var(--color-primary); text-shadow: 0 0 12px rgba(var(--rgb-accent), 0.5); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; padding: 4rem 2rem; box-shadow: inset 0 0 60px rgba(var(--rgb-accent), 0.3); }

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

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 2px 16px rgba(37,46,58,0.15); background-color: #ffffff; border-bottom: 1px solid rgba(var(--rgb-accent), 0.1); }

/* 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; }
}