:root {
    --color-primary: #ef4444;
    --color-primary-dark: #7f1d1d;
    --color-accent: #22c55e;
    --color-surface: #ecfeff;
    --color-text: #2b0a0a;
    --rgb-primary: 239,68,68;
    --rgb-accent: 34,197,94;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --shadow-sm: 0 6px 18px rgba(127,29,29,0.10);
    --shadow-md: 0 10px 30px rgba(127,29,29,0.16), 0 1px 0 rgba(0,0,0,0.06);
    --shadow-lg: 0 18px 48px rgba(239,68,68,0.22), 0 2px 0 rgba(0,0,0,0.08);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(135deg, rgba(239,68,68,0.06) 0%, rgba(34,197,94,0.06) 55%, rgba(236,254,255,0.7) 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,0.6); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.86) 0%, rgba(255,255,255,0.62) 55%, rgba(255,255,255,0.82) 100%);
    box-shadow:
        0 0 0 1px rgba(239,68,68,0.18),
        0 10px 30px rgba(127,29,29,0.14),
        0 1px 0 rgba(255,255,255,0.55) inset,
        0 0 0 rgba(0,0,0,0);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), filter var(--transition), opacity var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow:
        0 0 0 1px rgba(239,68,68,0.22),
        0 10px 20px rgba(127,29,29,0.12);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}
a:not([class]):hover, a:not([class]):focus {
    color: #b91c1c;
    text-shadow: 0 0 18px rgba(239,68,68,0.32);
}

/* ========== 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-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 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: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

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

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(1100px 420px at 10% 10%, rgba(34,197,94,0.35) 0%, rgba(34,197,94,0.08) 35%, rgba(34,197,94,0) 60%),
        radial-gradient(900px 340px at 90% 30%, rgba(239,68,68,0.45) 0%, rgba(239,68,68,0.10) 40%, rgba(239,68,68,0) 65%),
        linear-gradient(135deg, #ef4444 0%, #b91c1c 55%, #7f1d1d 100%);
    color: #ffffff;
    padding: 4rem 2rem;
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.14),
        0 24px 70px rgba(127,29,29,0.28),
        0 0 40px rgba(34,197,94,0.18);
}
.cta-section * { text-shadow: 0 2px 16px rgba(0,0,0,0.22); }

/* 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(-5px);
    box-shadow:
        0 0 0 1px rgba(34,197,94,0.30),
        0 18px 48px rgba(239,68,68,0.20),
        0 0 24px rgba(34,197,94,0.26),
        0 0 32px rgba(34,197,94,0.38),
        0 1px 0 rgba(255,255,255,0.6) inset;
    filter: saturate(1.05);
}
.card { border-left: 3px solid rgba(239,68,68,0.75); box-shadow: var(--shadow-md); }
header, .header, .navbar {
    background: transparent;
    box-shadow: none;
}

/* 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; }
}