:root {
    --color-primary: #0f5257;
    --color-primary-dark: #052c30;
    --color-accent: #ff7a59;
    --color-surface: #f5f6f8;
    --color-text: #1c2530;
    --rgb-primary: 15,82,87;
    --rgb-accent: 255,122,89;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(28,37,48,.05), 0 4px 12px rgba(28,37,48,.06);
    --shadow-md: 0 2px 4px rgba(20,40,50,.04), 0 14px 30px -10px rgba(20,40,50,.14);
    --shadow-lg: 0 4px 10px rgba(20,40,50,.05), 0 28px 54px -18px rgba(20,40,50,.20);
    --space-section: 3.25rem;
    --space-card: 1.5rem;
    --space-gap: 1.125rem;
    --transition: 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #14202b; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { background: #ffffff; border-radius: var(--radius-lg); box-shadow: inset 0 4px 0 0 rgba(var(--rgb-accent),.55), var(--shadow-md); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); box-shadow: 0 6px 18px -8px rgba(var(--rgb-primary),.45); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 1px 0 rgba(var(--rgb-accent),.18); }

/* ========== 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: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); border-radius: var(--radius-lg); background: #ffffff; box-shadow: 0 2px 4px rgba(20,40,50,.04), 0 16px 34px -12px rgba(20,40,50,.16); }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); opacity: 1; } 100% { transform: translateX(-50%); opacity: 1; } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; color: #0f5257; }
.stats-grid > * { border-radius: var(--radius-lg); box-shadow: inset 0 0 0 1px rgba(15,82,87,.10), 0 10px 26px -14px rgba(20,40,50,.20); }

/* cta: full-bg */
.cta-section { background: linear-gradient(140deg, #0f5257 0%, #08383e 55%, #052c30 100%); color: #f6fbfc; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.14); }

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #135e66 0%, #0c464e 48%, #052c30 100%); }
header, .header, .navbar { background: transparent; box-shadow: 0 1px 0 rgba(28,37,48,.06); backdrop-filter: saturate(140%) blur(6px); }

/* 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; --radius-lg: 18px; --radius-xl: 22px; }
    .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; }
}