/* CSSVariantEngine v3.0 — 98tiyu.net.cn */
/* Palette: gradient-lavender-pink | Radius: soft rounded | Shadow: multi-layer airy */
/* Spacing: masonry balanced | Transition: long smooth */
/* Section layouts: {"news":"featured-top","features":"horizontal","hero":"centered","testimonials":"masonry","partners":"grid-4","faq":"single-column","stats":"grid-3","cta":"centered"} */

:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-accent: #ec4899;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 99,102,241;
    --rgb-accent: 236,72,153;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 10px rgba(99, 102, 241, 0.07);
    --shadow-md: 0 8px 26px rgba(99, 102, 241, 0.13);
    --shadow-lg: 0 18px 52px rgba(99, 102, 241, 0.18);
    --space-section: 3.1rem;
    --space-card: 1.3rem;
    --space-gap: 1.2rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { 
    color: var(--color-text); 
    line-height: var(--body-line-height);
    background: linear-gradient(180deg, #f8fafc 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(145deg, #ffffff 0%, #faf7ff 100%);
    border-top: 4px solid;
    border-image: linear-gradient(90deg, var(--color-primary), var(--color-accent)) 1;
}
.card, [class*="card"]:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.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-accent) 100%);
    color: white;
    border: none;
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-dark) 100%);
    box-shadow: 0 6px 20px rgba(var(--rgb-primary), 0.3);
}
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: horizontal */
/* 水平滚动 */
.feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
.feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid > * {
    background: linear-gradient(145deg, #ffffff 0%, #fef7ff 100%);
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > * {
    background: linear-gradient(180deg, rgba(var(--rgb-primary), 0.05) 0%, rgba(var(--rgb-accent), 0.05) 100%);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-inner {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 35%, #ec4899 70%, #f472b6 100%);
    padding: 3rem;
    border-radius: var(--radius-xl);
    color: white;
    box-shadow: var(--shadow-lg);
}

/* Page Layout: wide */
/* 超宽 */
.page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
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(135deg, #6366f1 0%, #8b5cf6 30%, #ec4899 65%, #f472b6 100%);
    color: white;
}
header, .header, .navbar { 
    background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    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: 0.9rem; }
    .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; }
}