:root {
    --color-primary: #3d3833;
    --color-primary-dark: #1f1c19;
    --color-accent: #c47b5a;
    --color-accent-dark: #a35f3e;
    --color-sage: #87a878;
    --color-surface: #faf8f3;
    --color-surface-2: #f3ece1;
    --color-text: #2d2d2d;
    --rgb-primary: 61,56,51;
    --rgb-accent: 196,123,90;
    --rgb-sage: 135,168,120;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 36px;
    --shadow-sm: 0 1px 2px rgba(var(--rgb-primary),.07), 0 6px 14px -6px rgba(var(--rgb-accent),.22);
    --shadow-md: 0 2px 4px rgba(var(--rgb-primary),.06), 0 14px 30px -12px rgba(var(--rgb-primary),.20), 0 32px 64px -32px rgba(var(--rgb-accent),.30);
    --shadow-lg: 0 4px 10px rgba(var(--rgb-primary),.06), 0 26px 60px -18px rgba(var(--rgb-primary),.24), 0 60px 120px -48px rgba(var(--rgb-accent),.34);
    --space-section: 5.5rem;
    --space-card: 2rem;
    --space-gap: 1.75rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { background: linear-gradient(180deg, #faf8f3 0%, #f8f2e8 35%, #f2e9db 70%, #faf8f3 100%); color: var(--color-text); line-height: var(--body-line-height); accent-color: #c47b5a; caret-color: #a35f3e; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: var(--color-primary-dark); text-shadow: 0 1px 0 rgba(255,255,255,.65), 0 3px 16px rgba(var(--rgb-accent),.16); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); background: linear-gradient(155deg, #ffffff 0%, #fdfaf4 38%, #f7efe3 72%, #f1e6d6 100%); box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(var(--rgb-accent),.14); padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); background: linear-gradient(135deg, #c47b5a 0%, #b06a49 42%, #93533a 100%); color: #fdfaf4; box-shadow: 0 2px 4px rgba(var(--rgb-primary),.10), 0 10px 24px -10px rgba(var(--rgb-accent),.55), inset 0 1px 0 rgba(255,255,255,.28); transition: var(--transition); }
a:not([class]) { color: var(--color-accent-dark); text-decoration-color: rgba(var(--rgb-accent),.45); 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: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* 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, #2d2d2d 0%, #55443a 34%, #a35f3e 72%, #c47b5a 100%); color: #faf8f3; padding: 4rem 2rem; text-shadow: 0 2px 20px rgba(0,0,0,.30); box-shadow: 0 -1px 0 rgba(255,255,255,.06), 0 30px 80px -40px rgba(var(--rgb-accent),.55); }

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