:root {
    --color-primary: #0f766e;
    --color-primary-dark: #115e59;
    --color-accent: #fb7185;
    --color-surface: #faf9f7;
    --color-text: #1c1917;
    --rgb-primary: 15,118,110;
    --rgb-accent: 251,113,133;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 34px;
    --shadow-sm: 0 1px 2px rgba(28,25,23,.05), 0 3px 8px -3px rgba(15,118,110,.10);
    --shadow-md: 0 2px 4px -1px rgba(28,25,23,.05), 0 10px 22px -8px rgba(28,25,23,.10), 0 22px 44px -20px rgba(15,118,110,.22);
    --shadow-lg: 0 4px 8px -2px rgba(28,25,23,.06), 0 20px 40px -12px rgba(28,25,23,.12), 0 40px 72px -28px rgba(15,118,110,.28);
    --space-section: 4.25rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { background-color: var(--color-surface); color: var(--color-text); line-height: var(--body-line-height); caret-color: var(--color-accent); accent-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.6); }
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); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* 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: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; color: var(--color-text); }
.hero-content h1 { background-image: linear-gradient(115deg, #0f766e 0%, #14b8a6 42%, #fb7185 100%); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: none; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); } 
                .testimonial-list > * { flex: 0 0 100%; background-color: rgba(var(--rgb-accent), .06); }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
.partner-grid > * { border-radius: var(--radius-sm); opacity: .82; filter: saturate(.9) contrast(1.02); transition: var(--transition); }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list > * { border-radius: var(--radius-md); background-color: rgba(var(--rgb-primary), .04); border-color: rgba(var(--rgb-accent), .28); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid > * { border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border-top: 3px solid var(--color-accent); }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; background-image: radial-gradient(circle at 20% 15%, rgba(251,113,133,.16), transparent 62%), radial-gradient(circle at 85% 85%, rgba(15,118,110,.16), transparent 60%), linear-gradient(160deg, #ffffff 0%, #f4fbf9 100%); border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); padding: 2.25rem 1.75rem; }

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-accent), .30); background-color: #ffffff; }
header, .header, .navbar { box-shadow: 0 1px 0 rgba(var(--rgb-primary), .10), 0 6px 18px -10px rgba(28,25,23,.22), 0 18px 40px -26px rgba(15,118,110,.35); backdrop-filter: saturate(1.12) blur(6px); border-bottom-color: rgba(var(--rgb-accent), .35); }

/* Responsive */
@media (max-width: 1024px) {
    :root { --space-section: 3.5rem; --space-gap: 1.35rem; }
    .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: 1.1rem; --space-gap: 0.8rem; --radius-lg: 20px; --radius-xl: 26px; }
    .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; }
}