/* CSSVariantEngine v3.0 — zh-hongdandaren.com.cn */
/* Palette: teal-orange | Radius: sharp | Shadow: hard-offset */
/* Spacing: medium | Transition: snappy */
/* Section layouts: {"news":"featured-left","features":"grid-2","hero":"split","testimonials":"stacked","partners":"grid-4","faq":"with-sidebar","stats":"big-number","cta":"full-bg"} */

:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #f97316;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 249,115,22;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 2px 2px 0 #0f172a;
    --shadow-md: 4px 4px 0 #0f172a;
    --shadow-lg: 6px 6px 0 #0f172a;
    --space-section: 2.5rem;
    --space-card: 1.25rem;
    --space-gap: 1.75rem;
    --transition: 0.15s ease-out;
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 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); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border: 3px solid var(--color-text); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; }
.btn, button[class*="btn"], a[class*="btn"] { border: 2px solid var(--color-primary); border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-accent); color: #ffffff; }
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; background-color: #ecfdf5; border-color: var(--color-primary); }
                .news-grid > *:nth-child(2) { background-color: #fff7ed; border-color: var(--color-accent); }
                .news-grid > *:nth-child(3) { background-color: #f0f9ff; border-color: #0ea5e9; }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }
.feature-list > *:nth-child(4n+1) { background-color: #fef3c7; border-color: #f59e0b; }
.feature-list > *:nth-child(4n+2) { background-color: #dcfce7; border-color: #22c55e; }
.feature-list > *:nth-child(4n+3) { background-color: #fce7f3; border-color: #ec4899; }
.feature-list > *:nth-child(4n+4) { background-color: #e0e7ff; border-color: #6366f1; }

/* 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; }
                .testimonial-list > *:nth-child(odd) { background-color: #f0fdfa; border-color: var(--color-primary); }
                .testimonial-list > *:nth-child(even) { background-color: #fffbeb; border-color: var(--color-accent); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }
.partner-grid > * { border-color: #cbd5e1; background-color: #ffffff; }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .sidebar-card { background-color: #fef2f2; border-color: #ef4444; }

/* 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; color: var(--color-primary); text-shadow: 2px 2px 0 var(--color-accent); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%); color: #fff; padding: 4rem 2rem; border-top: 3px solid var(--color-text); border-bottom: 3px solid var(--color-text); }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow-lg); }
header, .header, .navbar { background-color: #ffffff; border-bottom: 3px solid var(--color-text); box-shadow: 3px 3px 0 rgba(15,23,42,0.15); }

/* 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; }
}