/* CSSVariantEngine v3.0 — int-lecaiwang-qq.com.cn */
/* Palette: sidebar-classic | Radius: medium 8-16px | Shadow: glow-effects */
/* Spacing: balanced | Transition: smooth-glow */
/* Section layouts: {"news":"grid-4","features":"grid-3","hero":"centered","testimonials":"stacked","partners":"scroll","faq":"two-column","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #0284c7;
    --color-primary-dark: #0369a1;
    --color-accent: #0ea5e9;
    --color-surface: #f8fafc;
    --color-text: #1e293b;
    --rgb-primary: 2, 132, 199;
    --rgb-accent: 14, 165, 233;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 4px rgba(14,165,233,0.1), 0 0 8px rgba(14,165,233,0.05);
    --shadow-md: 0 4px 12px rgba(14,165,233,0.15), 0 0 24px rgba(14,165,233,0.2);
    --shadow-lg: 0 10px 18px rgba(14,165,233,0.25), 0 0 32px rgba(14,165,233,0.4);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1.5rem;
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #f1f5f9; }
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-color: #ffffff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 0 12px rgba(var(--rgb-accent), 0.3); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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); }

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

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

/* testimonials: stacked */
/* 垂直堆叠 */
.testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* 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: 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; color: var(--color-primary); text-shadow: 0 0 12px rgba(var(--rgb-accent), 0.4); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #252e3a 0%, #1a202c 100%); color: #f0f9ff; padding: 4rem 2rem; box-shadow: 0 0 40px rgba(14,165,233,0.15); }

/* 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(-5px); box-shadow: 0 12px 24px rgba(14,165,233,0.3), 0 0 32px rgba(14,165,233,0.6); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.4); }
.card { border: 1px solid rgba(var(--rgb-accent), 0.1); }
header, .header, .navbar { background: #252e3a; border-bottom: 1px solid rgba(var(--rgb-accent), 0.2); box-shadow: 0 0 16px rgba(14,165,233,0.1); }

/* Subtle Pulsing Glow Animation */
@keyframes subtlePulse {
    0%, 100% { box-shadow: 0 0 12px rgba(var(--rgb-accent), 0.3); }
    50% { box-shadow: 0 0 20px rgba(var(--rgb-accent), 0.5); }
}
.btn, button[class*="btn"], a[class*="btn"]:not(:hover) { animation: subtlePulse 3s ease-in-out infinite; }

/* 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; }
}