/* CSSVariantEngine v3.0 — sh-nangongsports.com */
/* Palette: dense-dashboard | Radius: compact rounded | Shadow: multi-layer gradient glow */
/* Spacing: tight compact | Transition: smooth long 0.5s */
/* Section layouts: {"news":"featured-left","features":"grid-3","hero":"left-aligned","testimonials":"carousel","partners":"scroll","faq":"two-column","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #334155 100%);
    --color-text: #f1f5f9;
    --rgb-primary: 59, 130, 246;
    --rgb-accent: 96, 165, 250;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.35), 0 1px 4px 0 rgba(59, 130, 246, 0.1);
    --shadow-md: 0 2px 8px 0 rgba(15, 23, 42, 0.3), 0 4px 12px -2px rgba(59, 130, 246, 0.15);
    --shadow-lg: 0 4px 16px 0 rgba(15, 23, 42, 0.4), 0 8px 24px -4px rgba(59, 130, 246, 0.25);
    --space-section: 2.5rem;
    --space-card: 0.875rem;
    --space-gap: 0.875rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 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);
    min-height: 100vh;
}
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: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(96, 165, 250, 0.05) 100%) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(90deg, #3b82f6 0%, #2563eb 100%);
    color: #ffffff;
    border: none;
}
a:not([class]) { color: var(--color-accent); 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; }

/* 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: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; } 
.testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 25s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* 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: 2rem; }
.stats-grid .stat-value { font-size: 3rem; color: #3b82f6; background: linear-gradient(90deg, #3b82f6, #60a5fa, #3b82f6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(120deg, #3b82f6 0%, #2563eb 35%, #1d4ed8 70%, #3b82f6 100%); 
    color: #fff; 
    padding: 4rem 2rem; 
}

/* Page Layout: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; padding: 0 0.75rem; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-2px); 
    box-shadow: var(--shadow-lg); 
    border-image: linear-gradient(135deg, #3b82f6 0%, #60a5fa 50%, #3b82f6 100%) 1;
}
a:not([class]):hover { color: #93c5fd; }
header, .header, .navbar { 
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.95) 0%, rgba(30, 41, 59, 0.7) 100%); 
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.15);
}

/* 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; }
}