:/* Card Mosaic — Tight Rhythm */
:root {
    --color-primary: #0077b6;
    --color-primary-dark: #023e8a;
    --color-accent: #f72585;
    --color-surface: #f8f9fa;
    --color-text: #212529;
    --rgb-primary: 0,119,182;
    --rgb-accent: 247,37,133;
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 3px rgba(33,37,41,.06), 0 1px 2px rgba(33,37,41,.04);
    --shadow-md: 0 4px 6px rgba(2,62,138,.08), 0 2px 4px rgba(2,62,138,.06);
    --shadow-lg: 0 10px 15px rgba(2,62,138,.1), 0 4px 6px rgba(2,62,138,.08);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-md); box-shadow: var(--shadow-sm); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; border: 1px solid rgba(0,119,182,.08); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-sm); transition: var(--transition); background-color: var(--color-primary); color: #ffffff; border: 1px solid var(--color-primary); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration: underline; text-decoration-color: rgba(0,119,182,.3); text-underline-offset: 2px; }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* 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; }
                .feature-list .card { background-color: #ffffff; border-left: 4px solid var(--color-accent); }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }
.hero-content h1 { color: #ffffff; text-shadow: 0 2px 4px rgba(2,62,138,.3); }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }
                .testimonial-list .card { background-color: #ffffff; border-top: 3px solid var(--color-accent); }

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }
                .faq-wrapper .faq-list .card { background-color: #ffffff; border-left: 3px solid var(--color-primary); }
                .faq-wrapper > :last-child { background-color: var(--color-primary-dark); color: #ffffff; border-radius: var(--radius-md); padding: 1.5rem; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background-color: #ffffff; border-bottom: 3px solid var(--color-accent); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #023e8a 0%, #0077b6 50%, #0096c7 100%); color: #ffffff; padding: 4rem 2rem; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: rgba(247,37,133,.2); }
a:not([class]):hover { color: var(--color-accent); text-decoration-color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #023e8a 0%, #0077b6 60%, #0096c7 100%); }
.hero .card, [class*="hero"] .card { background-color: rgba(255,255,255,.95); backdrop-filter: blur(4px); }

/* 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; }
}