:root {
    --color-primary: #c2410c;
    --color-primary-dark: #7c2d12;
    --color-accent: #0ea5e9;
    --color-surface: #f5f5f4;
    --color-text: #1c1917;
    --rgb-primary: 194,65,12;
    --rgb-accent: 14,165,233;
    --radius-sm: 1px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 2px 2px 0 rgba(28,25,23,.18), 4px 4px 0 rgba(194,65,12,.08);
    --shadow-md: 4px 4px 0 rgba(28,25,23,.22), 8px 8px 0 rgba(14,165,233,.10);
    --shadow-lg: 5px 5px 0 rgba(28,25,23,.28), 10px 10px 0 rgba(194,65,12,.14), 0 14px 28px rgba(28,25,23,.10);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.15s cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(180deg, #e7e5e4 0%, #f5f5f4 48%, #fafaf9 100%); caret-color: var(--color-primary); accent-color: var(--color-accent); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #0c0a09; text-shadow: 1px 1px 0 rgba(255,255,255,.7); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(180deg, #ffffff 0%, #fffaf5 100%); border-color: rgba(var(--rgb-primary), .26); border-style: solid; outline: 1px dashed rgba(var(--rgb-accent), .18); outline-offset: -1px; backdrop-filter: blur(0px); filter: saturate(1.02) contrast(1.01); opacity: .985; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(180deg, #f97316 0%, #c2410c 100%); color: #fff7ed; border-color: #7c2d12; border-style: solid; box-shadow: 3px 3px 0 rgba(28,25,23,.24), 6px 6px 0 rgba(14,165,233,.12); text-shadow: 1px 1px 0 rgba(124,45,18,.35); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(var(--rgb-accent), .7); text-shadow: 0 1px 0 rgba(255,255,255,.7); }

/* ========== 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); background: linear-gradient(180deg, #ffffff 0%, #fff7ed 100%); box-shadow: 4px 4px 0 rgba(28,25,23,.2), 8px 8px 0 rgba(249,115,22,.10); }

/* features: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; box-shadow: inset 0 -8px 0 rgba(255,255,255,.14); }
                .hero-content { position: relative; z-index: 1; color: #fffaf5; text-shadow: 2px 2px 0 rgba(28,25,23,.28); }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

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

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

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

/* 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); filter: saturate(1.08) contrast(1.03); border-color: rgba(var(--rgb-accent), .42); }
a:not([class]):hover { color: var(--color-accent); text-decoration-color: rgba(var(--rgb-primary), .8); }
.hero, [class*="hero"], section:first-of-type { background: linear-gradient(135deg, #7c2d12 0%, #c2410c 48%, #0ea5e9 100%); }
.card { border: 1px solid rgba(var(--rgb-primary), .26); }
header, .header, .navbar { background: linear-gradient(180deg, rgba(250,250,249,.72) 0%, rgba(245,245,244,.38) 100%); backdrop-filter: blur(8px); box-shadow: 0 1px 0 rgba(255,255,255,.8), 0 6px 18px rgba(28,25,23,.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: 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; }
}