:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #5eead4;
    --color-surface: #f0fdfa;
    --color-text: #1a2e35;
    --rgb-primary: 15,118,110;
    --rgb-accent: 94,234,212;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(15,118,110,.08), 0 1px 2px rgba(15,118,110,.06);
    --shadow-md: 0 4px 16px rgba(15,118,110,.12), 0 2px 6px rgba(15,118,110,.08), inset 0 1px 0 rgba(255,255,255,.6);
    --shadow-lg: 0 12px 40px rgba(15,118,110,.18), 0 4px 12px rgba(15,118,110,.10), inset 0 1px 0 rgba(255,255,255,.5);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(170deg, #f0fdfa 0%, #e6fffa 40%, #ccfbf1 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(135deg, #134e4a 0%, #0f766e 60%, #0d9488 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
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 50%, #e0f7f4 100%); border: 1px solid rgba(15,118,110,.10); }
.card:hover, [class*="card"]:hover { box-shadow: var(--shadow-lg); border-color: rgba(15,118,110,.22); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #0f766e 0%, #0d9488 50%, #14b8a6 100%); color: #f0fdfa; border: 1px solid rgba(255,255,255,.15); box-shadow: 0 2px 8px rgba(15,118,110,.25), inset 0 1px 0 rgba(255,255,255,.20); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background: linear-gradient(135deg, #134e4a 0%, #0f766e 50%, #0d9488 100%); box-shadow: 0 6px 20px rgba(15,118,110,.35), inset 0 1px 0 rgba(255,255,255,.25); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(15,118,110,.35); }
a:not([class]):hover { text-decoration-color: var(--color-accent); }

/* ========== 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: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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(180deg, #0f766e 0%, #14b8a6 60%, #5eead4 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-shadow: 0 2px 12px rgba(15,118,110,.15); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #134e4a 0%, #0f766e 35%, #0d9488 70%, #14b8a6 100%); color: #f0fdfa; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.10), inset 0 -1px 0 rgba(0,0,0,.10); }

/* 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); }
header, .header, .navbar { box-shadow: 0 2px 12px rgba(15,118,110,.10), 0 1px 3px rgba(15,118,110,.06); background: linear-gradient(180deg, rgba(240,253,250,.95) 0%, rgba(204,251,241,.90) 100%); backdrop-filter: blur(12px) saturate(1.2); }

/* 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; }
}