/* CSSVariantEngine v3.0 — official-9you-online.com.cn */
/* Palette: slate-blue | Radius: medium | Shadow: glow */
/* Spacing: dense | Transition: smooth */
/* Section layouts: {"news":"grid-3","features":"grid-4","hero":"minimal","testimonials":"stacked","partners":"grid-4","faq":"two-column","stats":"inline","cta":"split"} */

:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #1e40af;
    --color-accent: #60a5fa;
    --color-surface: #e2e8f0;
    --color-card: #ffffff;
    --color-text: #1e293b;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 3px rgba(15,23,42,.08), 0 0 12px rgba(59,130,246,.15);
    --shadow-md: 0 4px 12px rgba(15,23,42,.1), 0 0 24px rgba(59,130,246,.4);
    --shadow-lg: 0 12px 28px rgba(15,23,42,.14), 0 0 36px rgba(59,130,246,.5);
    --space-section: 2.5rem;
    --space-card: 1rem;
    --space-gap: 0.8rem;
    --transition: 0.25s cubic-bezier(.4,0,.2,1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body {
    background: var(--color-surface);
    color: var(--color-text);
    line-height: var(--body-line-height);
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.card, [class*="card"] {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
}

.card:hover, [class*="card"]:hover {
    box-shadow: 0 0 32px rgba(59,130,246,.6), 0 8px 24px rgba(15,23,42,.16);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    box-shadow: 0 0 16px rgba(59,130,246,.25);
    transition: var(--transition);
}

.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: 0 0 28px rgba(59,130,246,.5);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

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

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: minimal */
.hero { padding: 1.75rem 0; }
.hero-content { max-width: 560px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: inline */
.stats-grid { display: flex; justify-content: center; gap: 2.5rem; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 1.75rem; }

/* Page Layout: full-width */
.page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background: radial-gradient(ellipse at 20% 0%, rgba(59,130,246,.3), transparent 55%), linear-gradient(135deg, #1e293b, #0f172a);
    animation: heroGlow 6s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { box-shadow: 0 0 24px rgba(59,130,246,.25); }
    50% { box-shadow: 0 0 48px rgba(59,130,246,.5); }
}

header, .header, .navbar {
    background: transparent;
    box-shadow: 0 1px 0 rgba(15,23,42,.06);
}

/* 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: 1.6rem;
        --space-card: 0.85rem;
        --space-gap: 0.6rem;
    }
    .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; }
}