:root {
    --color-primary: #1a5b6b;
    --color-primary-dark: #0e3a45;
    --color-accent: #e0a458;
    --color-surface: #fdf3e3;
    --color-text: #1f2d2d;
    --rgb-primary: 26,91,107;
    --rgb-accent: 224,164,88;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 30px;
    --shadow-sm: 0 2px 4px rgba(15, 76, 92, 0.04), 0 6px 16px -4px rgba(15, 76, 92, 0.08);
    --shadow-md: 0 4px 8px rgba(15, 76, 92, 0.05), 0 18px 36px -8px rgba(15, 76, 92, 0.12);
    --shadow-lg: 0 8px 16px rgba(15, 76, 92, 0.08), 0 28px 56px -12px rgba(15, 76, 92, 0.18);
    --space-section: 5.5rem;
    --space-card: 2.25rem;
    --space-gap: 1.75rem;
    --transition: 0.4s ease;
    --heading-weight: 600;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #fff; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-color: var(--color-surface); }
section:nth-of-type(odd), .section:nth-of-type(odd) { background-color: #fff; }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #fff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

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

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

/* 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: 2.25rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 1px 0 rgba(15, 76, 92, 0.06), 0 4px 12px rgba(15, 76, 92, 0.06), 0 12px 28px -6px rgba(15, 76, 92, 0.10); }

/* 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: 2.25rem; --space-card: 1.2rem; --space-gap: 0.9rem; }
    .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; }
}