/* CSSVariantEngine v3.0 — huanyingtiyu.sh.cn */
/* Palette: emerald-dark | Radius: soft-rounded | Shadow: multi-layer gradient */
/* Spacing: comfortable | Transition: long-smooth */
/* Section layouts: {"news":"grid-4","features":"grid-3","hero":"overlay","testimonials":"masonry","partners":"grid-6","faq":"two-column","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #10b981;
    --color-primary-dark: #059669;
    --color-accent: #34d399;
    --color-surface: #f0fdf4;
    --color-sidebar: #252e3a;
    --color-text: #0f172a;
    --rgb-primary: 16, 185, 129;
    --rgb-accent: 52, 211, 153;
    --rgb-sidebar: 37, 46, 58;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 3px 10px rgba(var(--rgb-primary), 0.15), 0 1px 3px rgba(var(--rgb-sidebar), 0.1);
    --shadow-md: 0 6px 20px rgba(var(--rgb-primary), 0.12), 0 2px 6px rgba(var(--rgb-sidebar), 0.08);
    --shadow-lg: 0 12px 40px rgba(var(--rgb-primary), 0.1), 0 4px 12px rgba(var(--rgb-sidebar), 0.06);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 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%, #f7faf9 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-primary-dark) 50%, #047857 100%);
    color: white;
    border: none;
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero { 
    position: relative; 
    min-height: 70vh; 
    display: flex; 
    align-items: center; 
    background: linear-gradient(135deg, #252e3a 0%, #2d3a4a 40%, #1e293b 100%);
}
.hero-content { position: relative; z-index: 1; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 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 */
.card:hover, [class*="card"]:hover { 
    transform: translateY(-4px); 
    box-shadow: var(--shadow-lg);
    background: linear-gradient(145deg, #ffffff 0%, #f0fdf4 100%);
}
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #252e3a 0%, #2a3747 30%, #2f4f4f 70%, #1e293b 100%);
}
.card { 
    border: 2px solid transparent;
    border-image: linear-gradient(135deg, rgba(var(--rgb-primary), 0.2), rgba(var(--rgb-sidebar), 0.1)) 1;
}
header, .header, .navbar { 
    box-shadow: 0 4px 12px rgba(var(--rgb-sidebar), 0.15), 0 2px 6px rgba(var(--rgb-primary), 0.05);
    background: linear-gradient(90deg, #ffffff 0%, #f8fafc 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; }
}