/* CSSVariantEngine v3.0 — ng-nangongsports.com */
/* Palette: sidebar-classic | Radius: soft-rounded | Shadow: multi-layer gradient */
/* Spacing: balanced | Transition: long-smooth 0.5s */
/* Section layouts: {"news":"grid-4","features":"grid-2","hero":"centered","testimonials":"masonry","partners":"scroll","faq":"two-column","stats":"inline","cta":"split"} */

:root {
    --color-primary: #252e3a;
    --color-primary-dark: #1a212b;
    --color-accent: #f97316;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 37,46,58;
    --rgb-accent: 249,115,22;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 3px rgba(var(--rgb-primary),.15), 0 1px 2px rgba(var(--rgb-primary),.1);
    --shadow-md: 0 4px 12px rgba(var(--rgb-primary),.18), 0 2px 6px rgba(var(--rgb-primary),.12);
    --shadow-lg: 0 12px 28px rgba(var(--rgb-primary),.22), 0 6px 16px rgba(var(--rgb-primary),.15), 0 2px 4px rgba(var(--rgb-accent),.08);
    --space-section: 3.25rem;
    --space-card: 1.35rem;
    --space-gap: 1.1rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}
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(180deg, #ffffff 0%, #f1f5f9 100%);
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%) 1 stretch;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background: linear-gradient(135deg, var(--color-accent) 0%, #ea580c 100%);
    color: #ffffff;
    border: none;
}
a:not([class]) { 
    color: var(--color-accent); 
    transition: var(--transition); 
}

/* ========== 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-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* 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: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-4px) scale(1.01); 
    box-shadow: var(--shadow-lg); 
    border-image: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%) 1 stretch;
}
a:not([class]):hover { color: var(--color-primary); text-shadow: 0 0 2px rgba(var(--rgb-accent), 0.3); }
header, .header, .navbar { 
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); 
    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: 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; }
}