/* CSSVariantEngine v3.0 — aisports-portal.com.cn */
/* Palette: sidebar-classic | dark slate + amber | Radius: soft | Shadow: layered */
/* Spacing: generous | Transition: slow-ease */
/* Section layouts: {"news":"masonry-2","features":"grid-4","hero":"centered","testimonials":"stacked","partners":"scroll","faq":"single-column","stats":"grid-3","cta":"card-style"} */

:root {
    --color-primary: #3c4a57;
    --color-primary-dark: #252e3a;
    --color-accent: #d98e32;
    --color-surface: #f4f0e9;
    --color-text: #23272e;
    --rgb-primary: 60,74,87;
    --rgb-primary-dark: 37,46,58;
    --rgb-accent: 217,142,50;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 6px rgba(var(--rgb-primary-dark), .08), 0 1px 3px rgba(var(--rgb-primary-dark), .05);
    --shadow-md: 0 14px 28px rgba(var(--rgb-primary-dark), .10), 0 4px 10px rgba(var(--rgb-primary-dark), .06);
    --shadow-lg: 0 30px 60px rgba(var(--rgb-primary-dark), .14), 0 12px 24px rgba(var(--rgb-primary-dark), .08);
    --space-section: 4.5rem;
    --space-card: 1.6rem;
    --space-gap: 1.35rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.7;
    accent-color: var(--color-accent);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    caret-color: var(--color-accent);
    background:
        radial-gradient(ellipse at top left, rgba(var(--rgb-accent), .12), transparent 55%),
        linear-gradient(140deg, #faf8f4 0%, #f4f0e9 48%, #ede8df 100%);
    background-attachment: fixed;
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 2px rgba(255,255,255,.55); }
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, rgba(255,255,255,.96), rgba(248,245,239,.88));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #d1852e 0%, #b86a21 55%, #9e5a1b 100%);
    color: #fff;
    box-shadow: 0 10px 24px rgba(var(--rgb-accent), .28), 0 2px 4px rgba(var(--rgb-primary-dark), .12);
    text-shadow: 0 1px 2px rgba(var(--rgb-primary-dark), .35);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-accent), .5); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
.news-grid { column-count: 2; column-gap: var(--space-gap); }
.news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* 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;
    background: radial-gradient(ellipse at center, rgba(var(--rgb-accent), .12), transparent 72%);
}

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 2.25rem; overflow: hidden; animation: partnerScroll 26s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner {
    background: linear-gradient(145deg, #fffdf8 0%, #f7ecdb 48%, #eedcc0 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow: 0 28px 56px rgba(var(--rgb-primary-dark), .14), inset 0 0 0 1px rgba(var(--rgb-accent), .18);
}

/* 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); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.card {
    border: 1px solid transparent;
    background:
        linear-gradient(145deg, #ffffff 0%, #faf7f1 55%, #f3efe7 100%) padding-box,
        linear-gradient(135deg, rgba(var(--rgb-accent), .40), rgba(var(--rgb-primary), .14) 60%, rgba(var(--rgb-accent), .20)) border-box;
}
header, .header, .navbar {
    box-shadow: 0 4px 20px rgba(var(--rgb-primary-dark), .10), 0 1px 3px rgba(var(--rgb-primary-dark), .06);
    background: linear-gradient(135deg, rgba(255,255,255,.90), rgba(244,240,233,.94));
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

/* 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: 2.2rem; --space-card: 1.1rem; --space-gap: 0.85rem; }
    .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; }
}