/* CSSVariantEngine v3.0 — sc-milan.sx.cn */
/* Palette: vibrant gradient-mosaic | Radius: soft rounded | Shadow: multi-layer colored */
/* Spacing: medium | Transition: smooth long */
/* Section layouts: {"news":"grid-4","features":"grid-3","hero":"split","testimonials":"carousel","partners":"grid-6","faq":"two-column","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4338ca;
    --color-accent: #f472b6;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 99, 102, 241;
    --rgb-accent: 244, 114, 182;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 4px 12px rgba(99, 102, 241, 0.15), 0 1px 3px rgba(244, 114, 182, 0.1);
    --shadow-md: 0 8px 24px rgba(99, 102, 241, 0.18), 0 3px 9px rgba(244, 114, 182, 0.12);
    --shadow-lg: 0 16px 48px rgba(99, 102, 241, 0.22), 0 6px 18px rgba(244, 114, 182, 0.15), 0 2px 6px rgba(16, 185, 129, 0.08);
    --space-section: 4.2rem;
    --space-card: 1.6rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 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: radial-gradient(circle at top left, #e0e7ff 0%, #f8fafc 50%, #fdf4ff 100%);
    min-height: 100vh;
}
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, #f8faff);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(90deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    color: white;
    border: none;
}
a:not([class]) { 
    color: var(--color-primary); 
    transition: var(--transition);
    background: linear-gradient(180deg, transparent 60%, #fbcfe8 60%);
}

/* ========== 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); }
.news-grid .card:nth-child(odd) {
    background: linear-gradient(145deg, #f0f9ff, #e0f2fe);
}
.news-grid .card:nth-child(even) {
    background: linear-gradient(145deg, #fdf4ff, #fae8ff);
}

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list .card:nth-child(3n+1) {
    background: linear-gradient(145deg, #ecfdf5, #d1fae5);
}
.feature-list .card:nth-child(3n+2) {
    background: linear-gradient(145deg, #fff7ed, #ffedd5);
}
.feature-list .card:nth-child(3n) {
    background: linear-gradient(145deg, #fef3c7, #fde68a);
}

/* 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%; }
.testimonial-list .card {
    background: linear-gradient(135deg, #f5f3ff, #fce7f3);
}

/* 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); }
.faq-list .card {
    background: linear-gradient(145deg, #eff6ff, #dbeafe);
}

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.stats-grid .stat-value { font-size: 3rem; background: linear-gradient(90deg, #6366f1, #ec4899); -webkit-background-clip: text; color: transparent; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 35%, #ec4899 75%, #f472b6 100%); 
    color: #fff; 
    padding: 4rem 2rem; 
}

/* 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); }
.card { 
    border-left: 4px solid transparent; 
    border-image: linear-gradient(180deg, #8b5cf6, #ec4899, #10b981) 1; 
}
header, .header, .navbar { 
    background: linear-gradient(180deg, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
    backdrop-filter: blur(10px);
}

/* 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; }
}