:root {
    --color-primary: #1a2b4a;
    --color-primary-dark: #0b1220;
    --color-accent: #ff5c7a;
    --color-surface: #f5f7fb;
    --color-text: #101827;
    --rgb-primary: 26,43,74;
    --rgb-accent: 255,92,122;
    --radius-sm: 3px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 10px;
    --shadow-sm: 0 1px 0 rgba(10,18,32,.06);
    --shadow-md: 0 10px 22px rgba(16,24,39,.10), 0 2px 6px rgba(16,24,39,.06);
    --shadow-lg: 0 18px 40px rgba(16,24,39,.14), 0 4px 12px rgba(16,24,39,.08);
    --space-section: 3rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 850;
    --body-line-height: 1.7;
    --color-card: #ffffff;
    --color-card-border: rgba(17,24,39,.10);
    --color-glow: rgba(255,92,122,.22);
    --shadow-soft: 0 1px 0 rgba(255,255,255,.7), 0 10px 24px rgba(17,24,39,.08);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }

h1, h2, h3, h4 { font-weight: var(--heading-weight); letter-spacing: -0.01em; }

section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    background: var(--color-card);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-soft);
    padding: var(--space-card);
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition), background-color var(--transition);
    position: relative;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition), filter var(--transition);
    will-change: transform;
}

a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), opacity var(--transition);
}

h1, h2, h3, h4, a:not([class]) { text-shadow: 0 1px 0 rgba(255,255,255,.75); }

section { background-clip: padding-box; }

/* ========== 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: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 18s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: full-bg */
.cta-section {
    background: linear-gradient(135deg, #0f1f3a 0%, #1a2b4a 35%, #10243f 100%);
    color: #ffffff;
    padding: 4rem 2rem;
    box-shadow: 0 22px 60px rgba(10,18,32,.20), 0 2px 0 rgba(255,255,255,.08) inset;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,.10);
}

.cta-section { backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 18px rgba(255,92,122,.35), 0 1px 0 rgba(255,255,255,.7);
}

.card { border-left: 4px solid var(--color-accent); }

header, .header, .navbar {
    box-shadow:
        0 1px 0 rgba(255,255,255,.65),
        0 14px 38px rgba(16,24,39,.10),
        0 3px 10px rgba(16,24,39,.07);
    border-bottom: 1px solid rgba(17,24,39,.08);
    background: rgba(245,247,251,.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 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: 0.875rem; --space-gap: 0.6rem; --transition: 230ms cubic-bezier(0.2, 0.8, 0.2, 1); }
    .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; }
}