/* CSSVariantEngine v3.0 — zh-yihaoyule.net.cn */
/* Palette: sky-tech | Radius: medium | Shadow: glow-accent */
/* Spacing: comfortable | Transition: smooth-glow */
/* Section layouts: {"news":"masonry-2","features":"centered","hero":"split","testimonials":"stacked","partners":"centered","faq":"with-sidebar","stats":"grid-3","cta":"card-style"} */

@keyframes subtlePulse {
    0%, 100% { box-shadow: 0 0 24px rgba(var(--rgb-accent), 0.4); }
    50% { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6); }
}

:root {
    --color-primary: #0284c7;
    --color-primary-dark: #0369a1;
    --color-accent: #0ea5e9;
    --color-surface: #f1f5f9;
    --color-text: #1e293b;
    --rgb-primary: 2, 132, 199;
    --rgb-accent: 14, 165, 233;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --shadow-sm: 0 0 12px rgba(var(--rgb-accent), 0.15);
    --shadow-md: 0 0 24px rgba(var(--rgb-accent), 0.3), 0 2px 8px rgba(30, 41, 59, 0.08);
    --shadow-lg: 0 0 32px rgba(var(--rgb-accent), 0.4), 0 4px 12px rgba(30, 41, 59, 0.12);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 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); }
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), 0.1); background: #ffffff; }
.card:hover { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6), 0 6px 16px rgba(30,41,59,0.1); transform: translateY(-2px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: var(--color-primary); color: #ffffff; border: none; padding: 0.75rem 1.5rem; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background: var(--color-primary-dark); box-shadow: 0 0 28px rgba(var(--rgb-accent), 0.65); animation: subtlePulse 2s infinite ease-in-out; }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.3); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
.news-grid { column-count: 2; column-gap: var(--space-gap); }
.news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: centered */
/* 居中大卡片 */
.feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: split */
/* 左文右图 */
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid > * { filter: grayscale(0.7); transition: var(--transition); }
.partner-grid > *:hover { filter: grayscale(0); box-shadow: 0 0 20px rgba(var(--rgb-accent), 0.4); }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
.faq-wrapper > *:last-child { background: #252e3a; color: #f8fafc; border-radius: var(--radius-xl); padding: var(--space-card); box-shadow: 0 0 20px rgba(37,46,58,0.3); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background: linear-gradient(180deg, #ffffff 0%, var(--color-surface) 100%); }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #e0f2fe 0%, #f0f9ff 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: var(--shadow-lg); }

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

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 2px 16px rgba(37,46,58,0.18); background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); }

/* 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; }
}