/* CSSVariantEngine v3.0 — sx-weidetiyu.sx.cn */
/* Palette: slate-blue | Radius: compact | Shadow: multi-layer gradient */
/* Spacing: tight | Transition: long smooth 0.5s */
/* Section layouts: {"news":"masonry-2","features":"grid-3","hero":"left-aligned","testimonials":"carousel","partners":"centered","faq":"two-column","stats":"grid-4","cta":"card-style"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-accent: #93c5fd;
    --color-surface: linear-gradient(135deg, #f8fafc 0%, #eff6ff 100%);
    --color-text: #1e293b;
    --rgb-primary: 59,130,246;
    --rgb-accent: 147,197,253;
    --radius-sm: 2px;
    --radius-md: 6px;
    --radius-lg: 10px;
    --radius-xl: 14px;
    --shadow-sm: 0 1px 6px rgba(30, 41, 59, 0.07), 0 2px 4px rgba(59, 130, 246, 0.05);
    --shadow-md: 0 3px 12px rgba(30, 41, 59, 0.09), 0 6px 18px rgba(59, 130, 246, 0.07);
    --shadow-lg: 0 6px 24px rgba(30, 41, 59, 0.11), 0 12px 36px rgba(59, 130, 246, 0.1);
    --space-section: 1.75rem;
    --space-card: 0.875rem;
    --space-gap: 0.625rem;
    --transition: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { 
    color: #f1f5f9; 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 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%, #f8fafc 100%);
    color: var(--color-text);
}
.btn, button[class*="btn"], a[class*="btn"] { 
    border-radius: var(--radius-md); 
    transition: var(--transition);
    background: linear-gradient(90deg, #3b82f6 0%, #60a5fa 100%);
    color: white;
    border: none;
}
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
.news-grid { column-count: 2; column-gap: var(--space-gap); }
.news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

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

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* 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: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner { 
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 50%, #60a5fa 100%); 
    border-radius: var(--radius-xl); 
    padding: 3rem; 
    text-align: center;
    color: white;
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
}

/* 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(-3px); 
    box-shadow: 0 8px 28px rgba(30, 41, 59, 0.12), 0 16px 40px rgba(59, 130, 246, 0.15);
}
.card { 
    border: 1px solid transparent; 
    border-image: linear-gradient(135deg, #3b82f6 0%, #93c5fd 100%) 1 stretch;
}

/* 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; }
}