/* CSSVariantEngine v3.0 — zh-youzhibosports.cn */
/* Palette: teal-orange | Radius: large | Shadow: soft-multi-layer */
/* Spacing: mixed | Transition: smooth */
/* Section layouts: {"news":"featured-left","features":"grid-3","hero":"overlay","testimonials":"grid-3","partners":"grid-4","faq":"single-column","stats":"inline","cta":"full-bg"} */

:root {
    --color-primary: #0f766e;
    --color-primary-dark: #0d9488;
    --color-accent: #f97316;
    --color-surface: #f0fdfa;
    --color-text: #134e4a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 249,115,22;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --shadow-sm: 0 4px 8px rgba(15,118,110,0.06);
    --shadow-md: 0 6px 12px rgba(15,118,110,0.05), 0 20px 40px -10px rgba(15,118,110,0.12);
    --shadow-lg: 0 10px 20px rgba(249,115,22,0.07), 0 30px 50px -12px rgba(249,115,22,0.14);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.45s ease-in-out;
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 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); }
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: var(--color-accent); color: white; border: 2px solid rgba(255,255,255,0.2); }
.btn:hover { background: var(--color-primary-dark); transform: scale(1.03); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-decoration-thickness: 2px; }
a:not([class]):hover { color: var(--color-primary); }

/* ========== 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; background-color: #e0f2fe; }
.news-grid > *:nth-child(2) { background-color: #fef3c7; }
.news-grid > *:nth-child(3) { background-color: #fce7f3; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list > *:nth-child(odd) { background-color: #ccfbf1; }
.feature-list > *:nth-child(even) { background-color: #ffedd5; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
.hero-content { position: relative; z-index: 1; color: white; text-shadow: 0 2px 10px rgba(0,0,0,0.2); }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list > *:nth-child(3n+1) { background-color: #dbeafe; }
.testimonial-list > *:nth-child(3n+2) { background-color: #fef9c3; }
.testimonial-list > *:nth-child(3n+3) { background-color: #f3e8ff; }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid > * { background-color: white; border-radius: var(--radius-md); padding: 1rem; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list > * { background-color: white; border-left: 4px solid var(--color-accent); }

/* stats: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }
.stats-grid > * { background-color: white; padding: 1.5rem 2rem; border-radius: var(--radius-xl); }

/* cta: full-bg */
.cta-section { background: var(--color-accent); color: #fff; padding: 4rem 2rem; }
.cta-section .btn { background: white; color: var(--color-accent); }
.cta-section .btn:hover { background: var(--color-primary); color: white; }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #0f766e, #0369a1); }
.card { border: 2px solid rgba(var(--rgb-accent), 0.25); }

/* 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; }
}