/* CSSVariantEngine v3.0 — qingfengjiasuqi.com.cn */
/* Palette: sidebar-classic | Radius: soft rounded | Shadow: multi-layer gradient tinted */
/* Spacing: comfortable | Transition: smooth long curve */
/* Section layouts: {"news":"featured-top","features":"grid-2","hero":"overlay","testimonials":"carousel","partners":"scroll","faq":"two-column","stats":"grid-4","cta":"split"} */

:root {
    --color-primary: #252e3a;
    --color-primary-dark: #171e27;
    --color-accent: #2dd4bf;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 37, 46, 58;
    --rgb-accent: 45, 212, 191;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary), 0.1);
    --shadow-md: 0 10px 30px rgba(var(--rgb-primary), 0.14), 0 3px 8px rgba(var(--rgb-primary), 0.08);
    --shadow-lg: 0 20px 60px rgba(var(--rgb-primary), 0.18), 0 6px 16px rgba(var(--rgb-accent), 0.08);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --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, var(--color-surface) 0%, #e2e8f0 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(135deg, #ffffff 0%, #f1f5f9 50%, #eef2f7 100%);
    border: 1px solid transparent;
    border-image: linear-gradient(90deg, rgba(var(--rgb-primary), 0.15) 0%, rgba(var(--rgb-accent), 0.4) 50%, rgba(var(--rgb-primary), 0.15) 100%) 1 stretch;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(135deg, var(--color-primary) 0%, #3a4a5c 50%, var(--color-primary) 100%);
    border: 1px solid transparent;
    border-image: linear-gradient(90deg, var(--color-accent) 0%, #14b8a6 100%) 1 stretch;
    color: white;
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    background: linear-gradient(135deg, var(--color-accent) 0%, #14b8a6 50%, var(--color-accent) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.news-grid > *:first-child { grid-column: span 3; }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
.hero { 
    position: relative; 
    min-height: 70vh; 
    display: flex; 
    align-items: center; 
    background: linear-gradient(120deg, var(--color-primary) 0%, #2c3e50 40%, var(--color-accent) 100%);
    color: white;
}
.hero-content { position: relative; z-index: 1; }

/* testimonials: carousel */
/* 单条轮播 */
.testimonial-list { display: flex; overflow: hidden; } 
.testimonial-list > * { flex: 0 0 100%; }

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > div {
    background: radial-gradient(circle at top left, rgba(var(--rgb-accent), 0.15) 0%, transparent 70%);
    border-radius: var(--radius-md);
    padding: 1rem;
}

/* cta: split */
.cta-inner { 
    display: grid; 
    grid-template-columns: 1fr auto; 
    align-items: center; 
    gap: 2rem; 
    background: linear-gradient(135deg, var(--color-primary) 0%, #2c3e50 50%, var(--color-accent) 100%);
    color: white;
    border-radius: var(--radius-xl);
    padding: 3rem;
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 4px rgba(var(--rgb-accent), 0.3); }

/* 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; }
}