/* CSSVariantEngine v3.0 — int-heibai-ty.net.cn */
/* Palette: slate | Radius: sharp | Shadow: hard-offset */
/* Spacing: compact | Transition: snappy */
/* Section layouts: {"news":"grid-3","features":"horizontal","hero":"left-aligned","testimonials":"carousel","partners":"centered","faq":"with-sidebar","stats":"big-number","cta":"split"} */

:root {
    --color-primary: #334155;
    --color-primary-dark: #1e293b;
    --color-accent: #3b82f6;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --rgb-primary: 51,65,85;
    --rgb-accent: 59,130,246;
    --radius-sm: 0px;
    --radius-md: 2px;
    --radius-lg: 3px;
    --radius-xl: 4px;
    --shadow-sm: 2px 2px 0px #1e293b;
    --shadow-md: 4px 4px 0px #1e293b;
    --shadow-lg: 6px 6px 0px #1e293b;
    --space-section: 2.4rem;
    --space-card: 14px;
    --space-gap: 12px;
    --transition: 0.15s ease-out;
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { background: #1e293b; color: #f8fafc; line-height: var(--body-line-height); caret-color: var(--color-accent); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { background: var(--color-surface); color: var(--color-text); border: 2px solid var(--color-primary-dark); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.card:hover, [class*="card"]:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-lg); }
.btn, button[class*="btn"], a[class*="btn"] { background: var(--color-accent); color: #ffffff; border: 2px solid var(--color-primary-dark); border-radius: var(--radius-md); box-shadow: 3px 3px 0px var(--color-primary-dark); transition: var(--transition); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0px var(--color-primary-dark); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-decoration-thickness: 2px; }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* 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: 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: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid > * { filter: grayscale(1) brightness(2); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* 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: var(--color-accent); text-shadow: 2px 2px 0px rgba(0,0,0,0.2); }

/* cta: split */
.cta-inner { background: var(--color-surface); color: var(--color-text); padding: 1.5rem; border: 3px solid var(--color-primary-dark); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); 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 */
header, .header, .navbar { background: rgba(51, 65, 85, 0.95); border-bottom: 2px solid #1e293b; backdrop-filter: blur(4px); }

/* 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: 1.8rem; --space-card: 10px; --space-gap: 10px; }
    .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; }
}