/* CSSVariantEngine v3.0 — intl6-3377tiyu.com.cn */
/* Palette: slate-classic | Radius: sharp | Shadow: hard-offset */
/* Spacing: spacious | Transition: snappy */
/* Section layouts: {"news":"featured-left","features":"grid-4","hero":"left-aligned","testimonials":"masonry","partners":"grid-4","faq":"single-column","stats":"grid-4","cta":"centered"} */

:root {
    --color-primary: #3d5a80;
    --color-primary-dark: #22333b;
    --color-accent: #ee6c4d;
    --color-surface: #f0f2f5;
    --color-card: #ffffff;
    --color-text: #1c2541;
    --rgb-primary: 61,90,128;
    --rgb-primary-dark: 34,51,59;
    --rgb-accent: 238,108,77;
    --radius-sm: 0px;
    --radius-md: 1px;
    --radius-lg: 2px;
    --radius-xl: 4px;
    --shadow-sm: 0 0 0 2px rgba(var(--rgb-primary-dark),1), 3px 3px 0 0 rgba(var(--rgb-primary-dark),1);
    --shadow-md: 0 0 0 2px rgba(var(--rgb-primary-dark),1), 4px 4px 0 0 rgba(var(--rgb-primary-dark),1);
    --shadow-lg: 0 0 0 2px rgba(var(--rgb-primary-dark),1), 6px 6px 0 0 rgba(var(--rgb-primary-dark),1);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s ease-out;
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); background: var(--color-surface); 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"] { background: var(--color-card); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); background: var(--color-accent); color: #1c2541; box-shadow: var(--shadow-sm); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); 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: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); 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: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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(-2px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #252e3a 0%, #3d5a80 100%); }
header, .header, .navbar { background: #252e3a; color: #f0f2f5; box-shadow: 0 3px 0 0 #22333b; }

/* 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; }
}