:root {
    --color-primary: #0f766e;
    --color-primary-dark: #134e4a;
    --color-accent: #14b8a6;
    --color-surface: #f0fdfa;
    --color-text: #0f1e1c;
    --rgb-primary: 15,118,110;
    --rgb-accent: 20,184,166;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --shadow-sm: 0 1px 3px rgba(15,118,110,.08), 0 1px 2px rgba(15,118,110,.05);
    --shadow-md: 0 4px 14px rgba(15,118,110,.10), 0 2px 6px rgba(15,118,110,.06);
    --shadow-lg: 0 12px 32px rgba(15,118,110,.14), 0 4px 12px rgba(15,118,110,.08);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: linear-gradient(160deg, #f0fdfa 0%, #e6faf6 40%, #f5fffd 100%);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #134e4a; }
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 60%, #e6faf6 100%);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(15,118,110,.22), 0 1px 3px rgba(15,118,110,.14);
}
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover {
    box-shadow: 0 6px 20px rgba(15,118,110,.30), 0 3px 8px rgba(15,118,110,.18);
    background: linear-gradient(135deg, #134e4a 0%, #0f766e 100%);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); }

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

/* news: grid-3 */
                .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: minimal */
.hero { padding: 2rem 0; background: linear-gradient(180deg, #e6faf6 0%, #f0fdfa 50%, transparent 100%); } .hero-content { max-width: 560px; }

/* testimonials: stacked */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

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

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; color: #0f766e; text-shadow: 0 2px 12px rgba(20,184,166,.20); }

/* cta: split */
.cta-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    background: linear-gradient(135deg, #134e4a 0%, #0f766e 50%, #14b8a6 100%);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-primary), .10); }

/* 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; }
}