:root {
    --color-primary: #b91c1c;
    --color-primary-dark: #7f1d1d;
    --color-accent: #f97316;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --rgb-primary: 185,28,28;
    --rgb-accent: 249,115,22;
    --radius-sm: 0px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-xl: 6px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.5rem;
    --transition: 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.65;
    --border-strong: rgba(15, 23, 42, 0.14);
    --border-soft: rgba(15, 23, 42, 0.09);
    --ring: rgba(249, 115, 22, 0.55);
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: #ffffff; }
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-lg);
    box-shadow: none;
    padding: var(--space-card);
    transition: var(--transition);
    border: 1px solid var(--border-soft);
    background: #ffffff;
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid var(--border-strong);
    background: #ffffff;
    color: var(--color-text);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}
a:not([class]):hover { color: var(--color-accent); }

/* ========== 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); border-color: rgba(var(--rgb-primary), .22); background: #ffffff; }

/* features: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.feature-list .card { background: #ffffff; border-color: var(--border-soft); }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.hero-inner .card { background: #ffffff; border-color: rgba(var(--rgb-accent), .22); }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list .card { background: #ffffff; border-color: rgba(15, 23, 42, 0.12); }

/* 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%); } }
.partner-grid .card, .partner-grid [class*="card"] { background: #ffffff; border-color: rgba(15, 23, 42, 0.10); }

/* faq: single-column */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-list .card { background: #ffffff; border-color: rgba(var(--rgb-primary), .18); }

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }
.stats-grid .card { background: #ffffff; border-color: rgba(15, 23, 42, 0.12); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }
.cta-inner .card { background: #ffffff; border-color: rgba(var(--rgb-accent), .20); }

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

/* 条件性装饰 */
.card { border: 1px solid rgba(var(--rgb-primary), .14); }
header, .header, .navbar { background: transparent; }
header, .header, .navbar { border-color: transparent; }

/* Focus / outline */
.btn:focus, button[class*="btn"]:focus, a[class*="btn"]:focus, .card:focus-within {
    outline: 2px solid rgba(var(--rgb-accent), .55);
    outline-offset: 2px;
}

/* 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: 1.25rem; }
    .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; }
}