/* CSSVariantEngine v3.0 — about8-kaiyuntiyu.com.cn */
/* Palette: copper | Radius: moderate | Shadow: none */
/* Spacing: comfortable | Transition: bouncy */
/* Section layouts: {"news":"masonry-2","features":"horizontal","hero":"split","testimonials":"masonry","partners":"centered","faq":"with-sidebar","stats":"grid-4","cta":"centered"} */

:root {
    --color-primary: #252e3a;
    --color-primary-dark: #1a222d;
    --color-accent: #4e8cbf;
    --color-surface: #f4f8fc;
    --color-text: #1f2b36;
    --rgb-primary: 37,46,58;
    --rgb-accent: 78,140,191;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 2px rgba(20,30,40,0.08), 0 2px 4px rgba(20,30,40,0.06);
    --shadow-md: 0 6px 16px rgba(20,30,40,0.10), 0 16px 36px rgba(20,30,40,0.12);
    --shadow-lg: 0 12px 28px rgba(20,30,40,0.14), 0 32px 64px rgba(20,30,40,0.16);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(ellipse at 15% -10%, rgba(var(--rgb-accent), 0.18) 0%, transparent 340px), radial-gradient(ellipse at 90% 110%, rgba(var(--rgb-primary), 0.14) 0%, transparent 420px), linear-gradient(180deg, #fbfdff 0%, var(--color-surface) 45%, #dce5ee 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), inset 0 1px 0 rgba(255,255,255,0.72); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, var(--color-surface) 72%, #e2eaf3 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 58%, var(--color-primary-dark) 100%); color: #ffffff; box-shadow: 0 8px 18px rgba(var(--rgb-primary), 0.28), 0 2px 6px rgba(var(--rgb-primary), 0.18); text-shadow: 0 1px 2px rgba(15, 23, 32, 0.25); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-accent), 0.5); text-underline-offset: 3px; }

/* ========== 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: 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: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */

/* 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; }
}