/* CSSVariantEngine v3.0 — lecai17500.com.cn */
/* Palette: sidebar-classic | Radius: soft-rounded | Shadow: gradient-multi */
/* Spacing: moderate | Transition: smooth-long */
/* Section layouts: {"news":"featured-left","features":"grid-4","hero":"centered","testimonials":"stacked","partners":"grid-4","faq":"two-column","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-accent: #f97316;
    --color-surface: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --color-text: #1e293b;
    --rgb-primary: 37, 99, 235;
    --rgb-accent: 249, 115, 22;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(37, 46, 58, 0.09);
    --shadow-md: 0 4px 18px rgba(37, 46, 58, 0.13), 0 2px 7px rgba(37, 46, 58, 0.07);
    --shadow-lg: 0 10px 36px rgba(37, 46, 58, 0.2), 0 5px 14px rgba(249, 115, 22, 0.12);
    --space-section: 2.2rem;
    --space-card: 1.1rem;
    --space-gap: 0.9rem;
    --transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%); }
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); background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(249,115,22,0.1)) 1; }
.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: #ffffff; border: none; }
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

/* ========== 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: 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: stacked */
/* 垂直堆叠 */
                .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: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #252e3a 0%, #334155 45%, #1e293b 100%); color: #f8fafc; padding: 4rem 2rem; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #252e3a 0%, #2c3e50 30%, #2563eb 100%); color: #ffffff; }
header, .header, .navbar { box-shadow: 0 4px 20px rgba(37, 46, 58, 0.15); background: linear-gradient(90deg, #252e3a 0%, #334155 100%); }

/* 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; }
}