:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #f59e0b;
    --color-surface: #f0fdfa;
    --color-text: #042f2e;
    --rgb-primary: 15,118,110;
    --rgb-accent: 245,158,11;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-sm: 0 2px 4px -1px rgba(15,118,110,.12), 0 1px 2px rgba(245,158,11,.08);
    --shadow-md: 0 6px 16px -4px rgba(15,118,110,.18), 0 3px 6px -2px rgba(245,158,11,.1);
    --shadow-lg: 0 16px 40px -8px rgba(15,118,110,.22), 0 8px 16px -4px rgba(245,158,11,.14), 0 0 0 1px rgba(15,118,110,.05);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(175deg, #f0fdfa 0%, #ecfeff 40%, #fefce8 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
section:nth-of-type(odd), .section:nth-of-type(odd) { background: linear-gradient(135deg, rgba(15,118,110,.06) 0%, rgba(245,158,11,.04) 50%, rgba(15,118,110,.02) 100%); }
section:nth-of-type(even), .section:nth-of-type(even) { background: linear-gradient(225deg, rgba(245,158,11,.07) 0%, rgba(15,118,110,.03) 60%, rgba(245,158,11,.05) 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(160deg, #ffffff 0%, #f0fdfa 55%, #fefce8 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(15,118,110,.35), rgba(245,158,11,.3), rgba(15,118,110,.15)) 1; }
.card:hover, [class*="card"]:hover { box-shadow: var(--shadow-lg); background: linear-gradient(160deg, #f0fdfa 0%, #ffffff 50%, #fefce8 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #0f766e 0%, #115e59 50%, #0d9488 100%); color: #f0fdfa; box-shadow: 0 4px 12px -2px rgba(15,118,110,.35), 0 2px 4px rgba(245,158,11,.2); border: none; }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background: linear-gradient(135deg, #f59e0b 0%, #d97706 50%, #fbbf24 100%); box-shadow: 0 8px 24px -4px rgba(245,158,11,.45), 0 4px 8px rgba(15,118,110,.2); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(245,158,11,.4); }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; background: radial-gradient(ellipse at 30% 20%, rgba(15,118,110,.08) 0%, transparent 60%), radial-gradient(ellipse at 80% 80%, rgba(245,158,11,.08) 0%, transparent 55%); }

/* 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: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(120deg, rgba(15,118,110,.1) 0%, rgba(245,158,11,.06) 40%, rgba(15,118,110,.04) 100%); border-radius: var(--radius-xl); }

/* 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); }
.card { border: 1px solid rgba(var(--rgb-primary), .08); }

/* 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; }
}