/* CSSVariantEngine v3.0 — hua-tihui-about13.com.cn */
/* Palette: dark-stage | Radius: airy | Shadow: pillowy */
/* Spacing: spacious | Transition: smooth */
/* Section layouts: {"news":"grid-4","features":"grid-4","hero":"left-aligned","testimonials":"grid-3","partners":"scroll","faq":"with-sidebar","stats":"big-number","cta":"card-style"} */

:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #6d28d9;
    --color-accent: #fbbf24;
    --color-surface: #ffffff;
    --color-text: #f8fafc;
    --color-stage: #0f0f1a;
    --rgb-primary: 139,92,246;
    --rgb-accent: 251,191,36;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 40px;
    --shadow-sm: 0 4px 16px rgba(0,0,0,.18), 0 2px 6px rgba(0,0,0,.10);
    --shadow-md: 0 12px 32px rgba(0,0,0,.22), 0 4px 12px rgba(0,0,0,.08);
    --shadow-lg: 0 28px 60px rgba(0,0,0,.30), 0 12px 24px rgba(0,0,0,.12);
    --space-section: 6rem;
    --space-card: 2.25rem;
    --space-gap: 1.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background-color: var(--color-stage);
    background-image: radial-gradient(ellipse at top, rgba(139,92,246,.25) 0%, rgba(15,15,26,0) 70%);
}
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: var(--color-surface);
    color: #1a1a2e;
}
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
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-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

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

/* partners: scroll */
/* 自动滚动 */
.partner-grid { display: flex; gap: 2.25rem; overflow: hidden; animation: partnerScroll 30s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.25rem; }

/* stats: big-number */
/* 大数字居中 */
.stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2.25rem; }
.stats-grid .stat-value { font-size: 3rem; }

/* cta: card-style */
.cta-inner {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    color: #1a1a2e;
    box-shadow: 0 24px 60px rgba(0,0,0,.35);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
.page-main {
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(180deg, #fcf9ff 0%, #f5f0ff 100%);
    color: #1a1a2e;
    box-shadow: 0 0 80px rgba(139,92,246,.25);
}

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.card { border: 1px solid rgba(var(--rgb-primary), .18); }
header, .header, .navbar {
    background: rgba(15,15,26,.8);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 4px 24px rgba(0,0,0,.3);
    color: var(--color-text);
}

/* 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: 2.25rem; --space-card: 1.125rem; --space-gap: 0.875rem; }
    .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; }
}