:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #f97316;
    --color-surface: #fdf6e3;
    --color-text: #1c1917;
    --rgb-primary: 15,118,110;
    --rgb-accent: 249,115,22;
    --radius-sm: 3px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 3px rgba(15,118,110,.10), 0 1px 2px rgba(15,118,110,.06);
    --shadow-md: 0 6px 18px -4px rgba(15,118,110,.18), 0 3px 8px -2px rgba(249,115,22,.10);
    --shadow-lg: 0 18px 42px -10px rgba(15,118,110,.26), 0 8px 20px -6px rgba(249,115,22,.16);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --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(180deg, #ffffff 0%, #fdf6e3 55%, #fff7ed 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(135deg, rgba(15,118,110,.04) 0%, rgba(249,115,22,.05) 50%, rgba(15,118,110,.03) 100%); }
section:nth-of-type(even), .section:nth-of-type(even) { background: linear-gradient(160deg, #ffffff 0%, #fef3c7 100%); }
section:nth-of-type(odd), .section:nth-of-type(odd) { background: linear-gradient(200deg, #f0fdfa 0%, #ffffff 60%, #fff7ed 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(150deg, #ffffff 0%, #f0fdfa 100%); border: 1px solid rgba(15,118,110,.14); }
.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 4px 14px -3px rgba(15,118,110,.42); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* features: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

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

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, #0f766e 0%, #115e59 45%, #f97316 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; color: #fdf6e3; box-shadow: var(--shadow-lg); }

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

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 4px 16px -4px rgba(15,118,110,.22), 0 1px 4px rgba(249,115,22,.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; }
}