/* CSSVariantEngine v3.0 — zhcw-zhcw.com.cn */
/* Palette: sidebar-classic | Radius: soft | Shadow: multi-layer */
/* Spacing: moderate | Transition: smooth-long */
/* Section layouts: {"news":"grid-3","features":"centered","hero":"minimal","testimonials":"masonry","partners":"centered","faq":"two-column","stats":"inline","cta":"centered"} */

:root {
    --color-primary: #364f6b;
    --color-primary-dark: #252e3a;
    --color-accent: #3fc1c9;
    --color-surface: linear-gradient(145deg, #f8fafc 0%, #eef4f9 100%);
    --color-text: #1a2a3a;
    --rgb-primary: 54,79,107;
    --rgb-accent: 63,193,201;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 4px rgba(37,46,58,0.08), 0 1px 2px rgba(37,46,58,0.04);
    --shadow-md: 0 6px 12px rgba(37,46,58,0.12), 0 3px 6px rgba(37,46,58,0.06), 0 1px 2px rgba(37,46,58,0.03);
    --shadow-lg: 0 16px 24px rgba(37,46,58,0.15), 0 8px 12px rgba(37,46,58,0.08), 0 2px 4px rgba(37,46,58,0.04);
    --space-section: 2.2rem;
    --space-card: 1.1rem;
    --space-gap: 1rem;
    --transition: 0.55s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 800;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #f0f4f8 0%, #e6edf3 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); 
    padding: var(--space-card); 
    transition: var(--transition);
    background: linear-gradient(145deg, #ffffff 0%, #f7fafd 100%);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    border-image: linear-gradient(135deg, var(--color-accent), var(--color-primary-dark)) 1;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 2px rgba(var(--rgb-accent), 0.2); }

/* ========== 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: centered */
/* 居中大卡片 */
.feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; color: #ffffff; text-shadow: 0 2px 8px rgba(0,0,0,0.15); }

/* 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: inline */
/* 水平排列 */
.stats-grid { display: flex; justify-content: center; gap: 3rem; }

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

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
.page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #252e3a 0%, #364f6b 45%, #3fc1c9 100%);
}
.card { 
    border-left: 4px solid;
    border-image: linear-gradient(to bottom, var(--color-accent), var(--color-primary-dark)) 1;
}
header, .header, .navbar { 
    box-shadow: 0 4px 12px rgba(37,46,58,0.1), 0 2px 6px rgba(37,46,58,0.05);
    background: linear-gradient(180deg, #ffffff 0%, #f5f8fb 100%);
}

/* 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; }
}