:root {
    --color-primary: #c2410c;
    --color-primary-dark: #9a3412;
    --color-accent: #f59e0b;
    --color-surface: #faf3e7;
    --color-text: #1c1917;
    --rgb-primary: 194,65,12;
    --rgb-accent: 245,158,11;
    --radius-sm: 1px;
    --radius-md: 3px;
    --radius-lg: 5px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 0 rgba(28,25,23,0.04), 0 1px 2px rgba(194,65,12,0.05);
    --shadow-md: 0 1px 2px rgba(28,25,23,0.06), 0 2px 4px rgba(194,65,12,0.06);
    --shadow-lg: 0 2px 3px rgba(28,25,23,0.08), 0 4px 8px rgba(194,65,12,0.1);
    --space-section: 1.75rem;
    --space-card: 0.875rem;
    --space-gap: 0.625rem;
    --transition: 0.16s cubic-bezier(0.4, 0, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #ffffff; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-color: var(--color-surface); box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), inset 0 -1px 0 rgba(28,25,23,0.04); }
.card, [class*="card"] { border-radius: var(--radius-md); box-shadow: var(--shadow-sm); padding: var(--space-card); transition: var(--transition); background-color: #ffffff; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-sm); transition: var(--transition); box-shadow: var(--shadow-sm); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: featured-left */
/* 左大右小 (1大+2小) */
                .news-grid { display: grid; grid-template-columns: 2fr 1fr; grid-template-rows: auto auto; gap: var(--space-gap); }
                .news-grid > *:first-child { grid-row: span 2; }

/* features: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: left-aligned */
.hero-content { text-align: left; max-width: 600px; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 1.75rem; }
                .stats-grid .stat-value { font-size: 3rem; }

/* cta: card-style */
.cta-inner { background: #1c1917; color: #faf3e7; border-radius: var(--radius-xl); padding: 2.5rem; text-align: center; box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), var(--shadow-lg); }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: rgba(var(--rgb-primary), 0.22); }
a:not([class]):hover { color: var(--color-accent); }
.card { background-color: #ffffff; border: 1px solid rgba(var(--rgb-primary), 0.12); box-shadow: var(--shadow-sm); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.78)); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); box-shadow: 0 1px 0 rgba(28,25,23,0.06); }

/* 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: 1.6rem; --space-card: 0.8rem; --space-gap: 0.6rem; }
    .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; }
}