:root {
    --color-primary: #0f766e;
    --color-primary-dark: #042f2e;
    --color-accent: #f59e0b;
    --color-surface: #f0fdfa;
    --color-text: #0c1a1a;
    --rgb-primary: 15,118,110;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 3px rgba(15,118,110,0.10), 0 1px 2px rgba(15,118,110,0.06);
    --shadow-md: 0 4px 14px rgba(15,118,110,0.12), 0 2px 6px rgba(15,118,110,0.08), 0 0 0 1px rgba(15,118,110,0.04);
    --shadow-lg: 0 12px 32px rgba(15,118,110,0.16), 0 4px 12px rgba(15,118,110,0.10), 0 0 0 1px rgba(15,118,110,0.05);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(160deg, #f0fdfa 0%, #ecfeff 40%, #f0fdfa 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%, #f0fdfa 55%, #ecfeff 100%); border: 1px solid rgba(15,118,110,0.10); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #0f766e 0%, #115e59 50%, #134e4a 100%); color: #f0fdfa; border: 1px solid rgba(245,158,11,0.20); box-shadow: 0 2px 8px rgba(15,118,110,0.22), 0 1px 3px rgba(15,118,110,0.14); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background: linear-gradient(135deg, #115e59 0%, #134e4a 50%, #042f2e 100%); box-shadow: 0 6px 20px rgba(15,118,110,0.30), 0 2px 6px rgba(15,118,110,0.18); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 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-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); 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, #0f766e 0%, #f59e0b 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #042f2e 0%, #0f766e 45%, #115e59 100%); color: #f0fdfa; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(245,158,11,0.15), 0 8px 28px rgba(4,47,46,0.28); }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1400px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover { color: var(--color-accent); }

/* 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; }
}