:root {
    --color-primary: #b91c1c;
    --color-primary-dark: #4a0f0f;
    --color-accent: #22c55e;
    --color-surface: #eafff3;
    --color-text: #0b1220;

    --rgb-primary: 185,28,28;
    --rgb-accent: 34,197,94;

    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 0px;
    --radius-xl: 2px;

    --shadow-sm: 4px 4px 0 rgba(11,18,32,.18);
    --shadow-md: 4px 4px 0 rgba(11,18,32,.22), 8px 8px 0 rgba(11,18,32,.08);
    --shadow-lg: 4px 4px 0 rgba(11,18,32,.28), 10px 10px 0 rgba(11,18,32,.10), 0 12px 24px rgba(11,18,32,.18);

    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;

    --transition: 0.15s cubic-bezier(.2,.8,.2,1);

    --heading-weight: 800;
    --body-line-height: 1.7;
}

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

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

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

.card, [class*="card"] {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
    border: 2px solid rgba(11,18,32,.18);
    background: linear-gradient(180deg, rgba(234,255,243,.92), rgba(234,255,243,.72));
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition);
    border: 2px solid rgba(11,18,32,.25);
}

a:not([class]) { color: var(--color-primary); transition: var(--transition); }
a:not([class]):hover { text-shadow: 2px 2px 0 rgba(185,28,28,.22); }

.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(11,18,32,.35);
}

a:not([class]):hover { color: var(--color-accent); }

.hero, [class*="hero"], section:first-of-type {
    background: radial-gradient(1200px 420px at 18% 18%, rgba(34,197,94,.35), transparent 60%),
                radial-gradient(900px 380px at 82% 40%, rgba(185,28,28,.35), transparent 58%),
                linear-gradient(135deg, #111827, #252e3a 55%, #1f2937);
    border-top: 3px solid rgba(255,255,255,.08);
    border-bottom: 3px solid rgba(11,18,32,.25);
}

@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; }
}

/* ========== 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: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

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

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

/* 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); } 100% { transform: translateX(-50%); } }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 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(-6px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type { background: radial-gradient(1100px 420px at 22% 25%, rgba(34,197,94,.36), transparent 62%),
linear-gradient(135deg, #111827, #252e3a 55%, #4a0f0f); }