/* CSSVariantEngine v3.0 — lejingtiyu.sx.cn */
/* Palette: sky cyan | Radius: medium rounded | Shadow: glow accented */
/* Spacing: uniform 24px gap | Transition: fluid easing */
/* Section layouts: {"news":"featured-left","features":"centered","hero":"split","testimonials":"stacked","partners":"grid-6","faq":"single-column","stats":"grid-4","cta":"split"} */

:root {
    --color-primary: #0ea5e9;
    --color-primary-dark: #0369a1;
    --color-accent: #7dd3fc;
    --color-surface: #f0f9ff;
    --color-text: #0c4a6e;
    --rgb-primary: 14, 165, 233;
    --rgb-accent: 125, 211, 252;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 0 12px rgba(var(--rgb-accent), 0.25), 0 2px 6px rgba(var(--rgb-primary), 0.08);
    --shadow-md: 0 0 24px rgba(var(--rgb-accent), 0.4), 0 4px 12px rgba(var(--rgb-primary), 0.12);
    --shadow-lg: 0 0 36px rgba(var(--rgb-accent), 0.5), 0 8px 24px rgba(var(--rgb-primary), 0.15);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 800;
    --body-line-height: 1.65;
    accent-color: var(--color-primary);
    caret-color: var(--color-primary);
}

@keyframes softPulse {
    0% { box-shadow: 0 0 22px rgba(var(--rgb-accent), 0.35), 0 4px 12px rgba(var(--rgb-primary), 0.1); }
    50% { box-shadow: 0 0 28px rgba(var(--rgb-accent), 0.45), 0 4px 12px rgba(var(--rgb-primary), 0.12); }
    100% { box-shadow: 0 0 22px rgba(var(--rgb-accent), 0.35), 0 4px 12px rgba(var(--rgb-primary), 0.1); }
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); }
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: softPulse 4s ease-in-out infinite; }
.card:hover, [class*="card"]:hover { box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6), 0 8px 20px rgba(var(--rgb-primary), 0.18); transform: translateY(-2px); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); color: white; border: none; box-shadow: 0 0 16px rgba(var(--rgb-primary), 0.35); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 0 30px rgba(var(--rgb-primary), 0.5); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-primary-dark); text-shadow: 0 0 8px rgba(var(--rgb-accent), 0.6); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
.news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
.news-grid > *:first-child { grid-row: span 2; }

/* 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: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

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

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

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

/* 条件性装饰 */
.card { border-top: 3px solid var(--color-primary); }
header, .header, .navbar { box-shadow: 0 0 16px rgba(var(--rgb-accent), 0.2), 0 2px 10px rgba(var(--rgb-primary), 0.08); background-color: rgba(255, 255, 255, 0.85); backdrop-filter: blur(10px); }

/* 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; }
}