:root {
    --color-primary: #0e7490;
    --color-primary-dark: #155e75;
    --color-accent: #f97316;
    --color-surface: #f2f5f7;
    --color-text: #102a33;
    --rgb-primary: 14,116,144;
    --rgb-accent: 249,115,22;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 36px;
    --shadow-sm: 0 2px 7px -1px rgba(16,42,51,.06), 0 1px 3px rgba(16,42,51,.04);
    --shadow-md: 0 12px 28px -10px rgba(16,42,51,.18), 0 4px 10px -5px rgba(16,42,51,.09);
    --shadow-lg: 0 28px 54px -20px rgba(16,42,51,.24), 0 10px 22px -12px rgba(16,42,51,.13);
    --space-section: 2.3rem;
    --space-card: 1.15rem;
    --space-gap: 0.9rem;
    --transition: 0.44s 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-color: var(--color-surface); caret-color: var(--color-accent); accent-color: var(--color-primary); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #0b3b47; text-shadow: 0 1px 0 rgba(255,255,255,.75); }
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), inset 0 3px 0 0 rgba(249,115,22,.55); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; border-color: rgba(14,116,144,.12); border-style: solid; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: 999px; transition: var(--transition); box-shadow: 0 8px 18px -8px rgba(14,116,144,.55); border-color: rgba(14,116,144,.22); border-style: solid; color: #ffffff; background-color: var(--color-primary); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(249,115,22,.55); }

/* ========== 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: 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: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; background-color: #0b3b47; background-image: linear-gradient(160deg, rgba(14,116,144,.92) 0%, rgba(11,59,71,.94) 55%, rgba(21,94,117,.90) 100%); }
                .hero-content { position: relative; z-index: 1; color: #f2f8fa; text-shadow: 0 2px 10px rgba(4,24,30,.45); }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; color: var(--color-primary-dark); }

/* 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 */
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 1px 6px rgba(249,115,22,.35); }

/* 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: 2.3rem; --space-card: 1.15rem; --space-gap: 0.9rem; --radius-lg: 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; }
}