:root {
    --color-primary: #0d9488;
    --color-primary-dark: #115e59;
    --color-accent: #f59e0b;
    --color-surface: #f6f5f1;
    --color-text: #1c1917;
    --rgb-primary: 13,148,136;
    --rgb-accent: 245,158,11;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 6px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.05), 0 8px 24px rgba(0, 0, 0, 0.08);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.16s ease-out;
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 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-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-radius: var(--radius-md); 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: horizontal */
/* 水平滚动 */
.feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
.feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

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

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #134e4a 0%, #0f766e 55%, #0d9488 100%); }
.card { border: 1px solid rgba(var(--rgb-primary), .12); }
header, .header, .navbar { box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.06); }

/* card-mosaic accents */
.news-grid > * { background: linear-gradient(180deg, #ecfeff, #a5f3fc); box-shadow: inset 0 0 0 1px rgba(8, 145, 178, 0.20), inset 0 2px 0 #06b6d4, var(--shadow-md); }
.feature-list > * { background: linear-gradient(180deg, #fff1f2, #fecdd3); box-shadow: inset 0 0 0 1px rgba(225, 29, 72, 0.18), inset 0 2px 0 #e11d48, var(--shadow-md); }
.testimonial-list > * { background: linear-gradient(180deg, #f5f3ff, #ddd6fe); box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.18), inset 0 2px 0 #7c3aed, var(--shadow-md); }
.partner-grid > * { background: linear-gradient(180deg, #fff7ed, #fed7aa); box-shadow: inset 0 0 0 1px rgba(234, 88, 12, 0.18), inset 0 2px 0 #ea580c, var(--shadow-md); }
.faq-wrapper > * { background: linear-gradient(180deg, #f0fdf4, #bbf7d0); box-shadow: inset 0 0 0 1px rgba(22, 163, 74, 0.16), inset 0 2px 0 #16a34a, var(--shadow-md); }
.stats-grid > * { background: linear-gradient(180deg, #eff6ff, #bfdbfe); box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.18), inset 0 2px 0 #2563eb, var(--shadow-md); }
.cta-inner > * { background: linear-gradient(180deg, #f0fdfa, #99f6e4); box-shadow: inset 0 0 0 1px rgba(13, 148, 136, 0.18), inset 0 2px 0 #0d9488, var(--shadow-md); }

/* 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; }
}