/* CSSVariantEngine v3.0 — card-mosaic + gradient-rich */
/* Palette: violet-amber | Radius: rounded | Shadow: layered glow */
/* Spacing: comfortable | Transition: smooth long */
/* Section layouts: {"news":"featured-top","features":"grid-3","hero":"left-aligned","testimonials":"carousel","partners":"grid-4","faq":"two-column","stats":"grid-3","cta":"full-bg"} */

:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f59e0b;
    --color-surface: #fdfaf7;
    --color-text: #1e1338;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 3px rgba(30,19,56,0.08), 0 4px 12px rgba(124,58,237,0.08);
    --shadow-md: 0 4px 16px rgba(30,19,56,0.10), 0 8px 24px rgba(124,58,237,0.10);
    --shadow-lg: 0 12px 32px rgba(30,19,56,0.12), 0 24px 64px rgba(124,58,237,0.20);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(160deg, var(--color-surface) 0%, #f5f3ff 50%, #faf5ff 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: radial-gradient(900px 420px at 50% 0%, rgba(124,58,237,0.06), transparent 70%);
}
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.7);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #ffffff 0%, #f3eeff 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(124,58,237,0.18);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 2px rgba(124,58,237,0.10);
}

/* ========== 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 > * {
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #ddd6fe 100%);
}
.news-grid > *:first-child {
    grid-column: span 3;
    background: linear-gradient(145deg, #ede9fe 0%, #c4b5fd 55%, #ddd6fe 100%);
}

/* features: grid-3 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
}
.feature-list > * {
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #5eead4 100%);
}

/* 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%;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #fcd34d 100%);
}

/* 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 > * {
    border-radius: var(--radius-xl);
    background: linear-gradient(145deg, #ffffff 0%, #f9a8d4 100%);
}

/* faq: two-column */
.faq-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-gap);
}
.faq-list > * {
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #a5b4fc 100%);
}

/* stats: grid-3 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-gap);
    text-align: center;
}
.stats-grid > * {
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff 0%, #fdba74 100%);
}

/* cta: full-bg */
.cta-section {
    background: linear-gradient(120deg, #7c3aed 0%, #4c1d95 50%, #2e1065 100%);
    color: #fdfcfb;
    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) scale(1.01);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(124,58,237,0.12);
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 2px 10px rgba(245,158,11,0.35);
}
.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(135deg, #2e1065 0%, #6d28d9 40%, #c026d3 100%);
}
header, .header, .navbar {
    background: rgba(253, 250, 247, 0.75);
    backdrop-filter: blur(12px);
    -webkit-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: 1.75rem;
        --space-card: 0.875rem;
        --space-gap: 0.625rem;
    }
    .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; }
}