/* CSSVariantEngine v3.0 — card-mosaic + glow-effects */
/* Palette: indigo-cyan | Radius: medium | Shadow: glow */
/* Spacing: comfortable | Transition: smooth */
/* Section layouts: {"news":"grid-3","features":"grid-4","hero":"centered","testimonials":"stacked","partners":"scroll","faq":"two-column","stats":"grid-3","cta":"card-style"} */

:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #3730a3;
    --color-accent: #f59e0b;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 79,70,229;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px rgba(15,23,42,0.06), 0 1px 3px rgba(15,23,42,0.08);
    --shadow-md: 0 4px 12px rgba(15,23,42,0.08), 0 2px 4px rgba(15,23,42,0.04), 0 0 24px rgba(79,70,229,0.12);
    --shadow-lg: 0 8px 20px rgba(15,23,42,0.12), 0 2px 6px rgba(15,23,42,0.06), 0 0 32px rgba(79,70,229,0.22);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { background: radial-gradient(ellipse at top, #f8fafc 0%, #eef2f7 100%); 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"] { border-radius: var(--radius-lg); box-shadow: 0 4px 12px rgba(15,23,42,0.06), 0 0 24px var(--card-glow, rgba(79,70,229,0.12)); padding: var(--space-card); transition: var(--transition); background-color: var(--card-bg, #ffffff); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: 0 0 16px rgba(79,70,229,0.12); }
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); --card-bg: #eff6ff; --card-accent: #3b82f6; --card-glow: rgba(59,130,246,0.25); --card-glow-hover: rgba(59,130,246,0.5); }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); --card-bg: #f5f3ff; --card-accent: #8b5cf6; --card-glow: rgba(139,92,246,0.25); --card-glow-hover: rgba(139,92,246,0.5); }

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

/* testimonials: stacked */
.testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; --card-bg: #fdf2f8; --card-accent: #ec4899; --card-glow: rgba(236,72,153,0.25); --card-glow-hover: rgba(236,72,153,0.5); }

/* partners: scroll */
.partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 28s linear infinite; --card-bg: #fffbeb; --card-accent: #f59e0b; --card-glow: rgba(245,158,11,0.25); --card-glow-hover: rgba(245,158,11,0.5); }
@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); --card-bg: #ecfdf5; --card-accent: #10b981; --card-glow: rgba(16,185,129,0.25); --card-glow-hover: rgba(16,185,129,0.5); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; --card-bg: #ffebee; --card-accent: #f43f5e; --card-glow: rgba(244,63,94,0.25); --card-glow-hover: rgba(244,63,94,0.5); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #0e7490, #06b6d4 60%, #22d3ee); border-radius: var(--radius-xl); padding: 3rem; text-align: center; color: #ffffff; box-shadow: 0 0 40px rgba(6,182,212,0.35); animation: ctaGlow 3s ease-in-out infinite; }

/* Page Layout: narrow-centered */
.page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(15,23,42,0.1), 0 0 32px var(--card-glow-hover, rgba(79,70,229,0.35)); animation: cardGlow 1.4s ease-in-out infinite; }
a:not([class]):hover { color: var(--color-accent); }
.card { border-left: 3px solid var(--card-accent, var(--color-primary)); }

@keyframes cardGlow {
    0%, 100% { box-shadow: 0 8px 20px rgba(15,23,42,0.10), 0 0 24px var(--card-glow, rgba(79,70,229,0.30)); }
    50% { box-shadow: 0 8px 24px rgba(15,23,42,0.12), 0 0 40px var(--card-glow-hover, rgba(79,70,229,0.55)); }
}

@keyframes ctaGlow {
    0%, 100% { box-shadow: 0 0 30px rgba(6,182,212,0.30), 0 8px 20px rgba(15,23,42,0.10); }
    50% { box-shadow: 0 0 48px rgba(6,182,212,0.50), 0 8px 20px rgba(15,23,42,0.10); }
}

/* 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: 1.1rem; --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; }
}