/* CSSVariantEngine v3.0 — center-game-kaiyun.com */
/* Palette: slate-indigo | Radius: soft-rounded | Shadow: layered-glow */
/* Spacing: spacious | Transition: smooth-gradient */
/* Section layouts: {"news":"featured-left","features":"horizontal","hero":"centered","testimonials":"masonry","partners":"scroll","faq":"single-column","stats":"grid-4","cta":"full-bg"} */

:root {
    --color-primary: #3b4a6b;
    --color-primary-dark: #252e3a;
    --color-accent: #7dd3fc;
    --color-surface: #eef2f9;
    --color-text: #1e293b;
    --rgb-primary: 59,74,107;
    --rgb-accent: 125,211,252;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(37,46,58,.08), 0 1px 2px rgba(37,46,58,.06);
    --shadow-md: 0 6px 18px rgba(37,46,58,.12), 0 2px 6px rgba(37,46,58,.08);
    --shadow-lg: 0 14px 36px rgba(37,46,58,.18), 0 6px 14px rgba(37,46,58,.1), 0 0 0 1px rgba(125,211,252,.08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 0.61, 0.36, 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: linear-gradient(160deg, #f7f9fc 0%, #eef2f9 55%, #e8eef7 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(120deg, #252e3a 0%, #3b4a6b 60%, #4a5e85 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(180deg, rgba(238,242,249,0) 0%, rgba(232,238,247,.5) 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(150deg, #ffffff 0%, #f4f7fc 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #3b4a6b 0%, #252e3a 100%); color: #f0f6ff; border: 1px solid rgba(125,211,252,.25); box-shadow: 0 4px 12px rgba(37,46,58,.22), inset 0 1px 0 rgba(255,255,255,.08); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background: linear-gradient(135deg, #4a5e85 0%, #2f3b4d 100%); box-shadow: 0 8px 22px rgba(37,46,58,.3), inset 0 1px 0 rgba(255,255,255,.12); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(125,211,252,.6); }

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; padding: 3rem 2rem; background: radial-gradient(ellipse at 50% 0%, rgba(125,211,252,.14) 0%, rgba(238,242,249,0) 70%); border-radius: var(--radius-xl); }

/* 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 20s linear infinite; opacity: .85; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > * { background: linear-gradient(160deg, #ffffff 0%, #eef2f9 100%); border-radius: var(--radius-md); padding: 1.25rem 1rem; box-shadow: var(--shadow-sm); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #252e3a 0%, #3b4a6b 55%, #4a5e85 100%); color: #f0f6ff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(125,211,252,.2), inset 0 -1px 0 rgba(0,0,0,.2); }

/* 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); }
.card { border: 1px solid rgba(var(--rgb-primary), .1); }
header, .header, .navbar { background: transparent; }

/* 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; }
}