:root {
    --color-primary: #e07b39;
    --color-primary-dark: #b85c1f;
    --color-accent: #f5a623;
    --color-surface: #faf7f2;
    --color-text: #2a2118;
    --rgb-primary: 224,123,57;
    --rgb-accent: 245,166,35;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --shadow-sm: 2px 2px 0px rgba(42,33,24,0.12);
    --shadow-md: 4px 4px 0px rgba(42,33,24,0.15);
    --shadow-lg: 6px 6px 0px rgba(42,33,24,0.18);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.15s ease;
    --heading-weight: 800;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #faf7f2; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #1a1410; }
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-color: #ffffff; border: 2px solid #e8e0d6; }
.card:hover, [class*="card"]:hover { box-shadow: 6px 6px 0px rgba(224,123,57,0.25); border-color: #e07b39; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: #e07b39; color: #ffffff; border: 2px solid #b85c1f; box-shadow: 3px 3px 0px rgba(42,33,24,0.2); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background-color: #b85c1f; box-shadow: 4px 4px 0px rgba(42,33,24,0.3); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: #f5a623; }
a:not([class]):hover { color: var(--color-primary-dark); }

/* ========== 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); }

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

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
.testimonial-list .card { border-left: 3px solid #e07b39; }

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

/* faq: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }
.faq-list .card { border-left: 3px solid #f5a623; }

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .card { background-color: #252e3a; color: #f5f0ea; border-color: #3a4556; box-shadow: 4px 4px 0px rgba(37,46,58,0.4); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

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

/* 条件性装饰 */

/* 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; --shadow-md: 3px 3px 0px rgba(42,33,24,0.15); --shadow-lg: 4px 4px 0px rgba(42,33,24,0.18); }
    .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; }
}