/* CSSVariantEngine v3.0 — zh-kaifa-qq.com.cn */
/* Palette: cyan-aqua | Radius: medium-glow | Shadow: neon-accent */
/* Spacing: asymmetric | Transition: smooth-bounce */
/* Section layouts: {"news":"featured-top","features":"grid-4","hero":"centered","testimonials":"masonry","partners":"centered","faq":"with-sidebar","stats":"grid-4","cta":"card-style"} */

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #22d3ee;
    --color-surface: #ecfeff;
    --color-text: #0c4a6e;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 34, 211, 238;
    --radius-sm: 7px;
    --radius-md: 13px;
    --radius-lg: 17px;
    --radius-xl: 23px;
    --shadow-sm: 0 0 14px rgba(var(--rgb-accent),.22);
    --shadow-md: 0 0 26px rgba(var(--rgb-accent),.42);
    --shadow-lg: 0 0 34px rgba(var(--rgb-accent),.62);
    --space-section: 4.2rem;
    --space-card: 1.6rem;
    --space-gap: 1.4rem;
    --transition: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

@keyframes subtlePulse {
    0%, 100% { box-shadow: var(--shadow-md); }
    50% { box-shadow: 0 0 28px rgba(var(--rgb-accent), .5); }
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #f8fafc; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 0 2px rgba(var(--rgb-accent), 0.1); }
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); border: 1px solid rgba(var(--rgb-accent), 0.3); animation: subtlePulse 4s infinite ease-in-out; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); border: 2px solid var(--color-accent); }
a:not([class]) { color: #0284c7; transition: var(--transition); text-decoration-thickness: 2px; text-underline-offset: 3px; }

/* ========== 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 > *:first-child { grid-column: span 3; }

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

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

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
.testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner { background: linear-gradient(145deg, #fef9c3, #fde047); border-radius: var(--radius-xl); padding: 3rem; text-align: center; border: 2px solid #eab308; }

/* 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(-4px); box-shadow: 0 0 40px rgba(var(--rgb-accent), 0.7); border-color: var(--color-primary); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #0ea5e9, #0369a1, #0891b2); }
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { box-shadow: 0 0 18px rgba(var(--rgb-accent), 0.18); background: rgba(255,255,255,0.85); 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: 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; }
}