/* CSSVariantEngine v3.0 — fegdianjing.org.cn */
/* Palette: tropical gradient | Radius: soft rounded | Shadow: multi-layer elevated */
/* Spacing: medium | Transition: smooth long */
/* Section layouts: {"news":"featured-top","features":"grid-4","hero":"split","testimonials":"carousel","partners":"grid-4","faq":"two-column","stats":"grid-4","cta":"full-bg"} */

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #f97316;
    --color-surface: #f0fdfa;
    --color-text: #0f172a;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 249, 115, 22;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.07), 0 1px 2px rgba(15, 23, 42, 0.04), inset 0 1px 0 rgba(255,255,255,0.6);
    --shadow-md: 0 8px 16px rgba(15, 23, 42, 0.09), 0 3px 6px rgba(15, 23, 42, 0.05), inset 0 1px 0 rgba(255,255,255,0.7);
    --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.12), 0 6px 12px rgba(15, 23, 42, 0.07), 0 2px 4px rgba(15, 23, 42, 0.04), inset 0 1px 0 rgba(255,255,255,0.8);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
    accent-color: var(--color-accent);
    caret-color: var(--color-primary);
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background: linear-gradient(180deg, #f0fdfa 0%, #ecfeff 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, #f8fafc);
    border: 1px solid transparent;
    border-image: linear-gradient(135deg, rgba(14,165,233,0.2), rgba(249,115,22,0.2)) 1;
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition); 
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    color: white;
    border: 0;
}
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-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* 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 .card {
    background: radial-gradient(circle at top left, rgba(14,165,233,0.1), transparent 60%);
}

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(115deg, #0ea5e9 0%, #10b981 45%, #f59e0b 100%); 
    color: #fff; 
    padding: 4rem 2rem; 
    box-shadow: inset 0 0 80px rgba(255,255,255,0.15);
}

/* 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(-6px); 
    box-shadow: var(--shadow-lg); 
    border-image: linear-gradient(135deg, var(--color-primary), var(--color-accent)) 1;
}
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.3); }
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(120deg, #06b6d4 0%, #10b981 40%, #f97316 100%); 
    box-shadow: inset 0 0 100px rgba(255,255,255,0.1);
}
header, .header, .navbar { background: transparent; backdrop-filter: blur(12px); }

/* 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; }
}