:root {
    --color-primary: #c2410c;
    --color-primary-dark: #7c2d12;
    --color-accent: #fb923c;
    --color-surface: #fff7ed;
    --color-text: #431407;
    --rgb-primary: 194,65,12;
    --rgb-accent: 251,146,60;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 3px rgba(124,45,18,.08), 0 1px 2px rgba(194,65,12,.06);
    --shadow-md: 0 4px 12px rgba(124,45,18,.12), 0 2px 6px rgba(194,65,12,.08), inset 0 1px 0 rgba(255,255,255,.6);
    --shadow-lg: 0 12px 28px rgba(124,45,18,.18), 0 6px 14px rgba(194,65,12,.12), inset 0 1px 0 rgba(255,255,255,.5);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #fff7ed 0%, #ffedd5 50%, #fed7aa 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(135deg, #9a3412 0%, #c2410c 50%, #ea580c 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: linear-gradient(160deg, rgba(255,247,237,.9) 0%, rgba(255,237,213,.6) 100%); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, #ffffff 0%, #fff7ed 60%, #ffedd5 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(194,65,12,.25), rgba(251,146,60,.15), rgba(194,65,12,.25)) 1; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #c2410c 0%, #ea580c 50%, #fb923c 100%); color: #fff7ed; box-shadow: 0 4px 14px rgba(194,65,12,.3), inset 0 1px 0 rgba(255,255,255,.25); border: 1px solid rgba(251,146,60,.4); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(194,65,12,.4); }
a:not([class]):hover { color: var(--color-accent); text-decoration-color: rgba(251,146,60,.7); }

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* 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; background: radial-gradient(ellipse at 30% 20%, rgba(251,146,60,.12) 0%, transparent 60%), radial-gradient(ellipse at 80% 80%, rgba(194,65,12,.08) 0%, transparent 50%); border-radius: var(--radius-xl); }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: grid-6 */
.partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--space-gap); align-items: center; }

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

/* 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: linear-gradient(135deg, #7c2d12 0%, #c2410c 35%, #ea580c 70%, #fb923c 100%); color: #fff7ed; padding: 4rem 2rem; box-shadow: inset 0 0 80px rgba(124,45,18,.3); }

/* 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(-4px); box-shadow: var(--shadow-lg); background: linear-gradient(145deg, #ffffff 0%, #fff7ed 40%, #fed7aa 100%); }
header, .header, .navbar { background: transparent; backdrop-filter: blur(8px) saturate(140%); }

/* 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; }
}