:root {
    --color-primary: #6b705c;
    --color-primary-dark: #4f5547;
    --color-accent: #c44536;
    --color-surface: #f5f1e8;
    --color-text: #1a1a1a;
    --rgb-primary: 107,112,92;
    --rgb-accent: 196,69,54;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 0 rgba(26,26,26,.06), 0 8px 22px rgba(26,26,26,.06);
    --shadow-md: 0 10px 28px rgba(26,26,26,.10), 0 2px 10px rgba(26,26,26,.06), inset 0 1px 0 rgba(255,255,255,.55);
    --shadow-lg: 0 18px 46px rgba(26,26,26,.14), 0 6px 18px rgba(26,26,26,.08), inset 0 1px 0 rgba(255,255,255,.65);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 260ms cubic-bezier(.2,.85,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.65;
    --card-border: rgba(26,26,26,.08);
}

body { color: var(--color-text); line-height: var(--body-line-height); background: var(--color-surface); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 1px 0 rgba(255,255,255,.65),
        0 14px 44px rgba(26,26,26,.10),
        0 6px 18px rgba(26,26,26,.06),
        inset 0 0 0 1px var(--card-border);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition);
    background: linear-gradient(180deg, rgba(255,255,255,.72), rgba(245,241,232,.92));
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-color: rgba(107,112,92,.35); }
a:not([class]):focus { outline: 2px solid rgba(196,69,54,.55); outline-offset: 3px; border-radius: 10px; }
a:not([class]) { text-shadow: 0 1px 0 rgba(255,255,255,.35); }

/* ========== 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 6px; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* hero: minimal */
.hero { padding: 2rem 0; } .hero-content { max-width: 560px; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s cubic-bezier(.2,.8,.2,1) infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 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(-6px);
    box-shadow:
        0 1px 0 rgba(255,255,255,.75),
        0 26px 70px rgba(26,26,26,.16),
        0 10px 26px rgba(26,26,26,.09),
        inset 0 0 0 1px rgba(26,26,26,.12);
}
a:not([class]):hover { color: var(--color-accent); text-decoration-color: rgba(196,69,54,.55); }
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 320px at 18% 10%, rgba(107,112,92,.20), transparent 60%),
        radial-gradient(700px 280px at 82% 30%, rgba(196,69,54,.18), transparent 58%),
        linear-gradient(135deg, #f5f1e8 0%, #f1eadb 28%, #efe6d1 60%, #f5f1e8 100%);
    border-radius: 24px;
    box-shadow: inset 0 0 0 1px rgba(26,26,26,.06);
}
.card { border-left: 3px solid rgba(107,112,92,.95); }
header, .header, .navbar {
    box-shadow:
        0 10px 30px rgba(26,26,26,.08),
        0 2px 10px rgba(26,26,26,.04),
        inset 0 1px 0 rgba(255,255,255,.65);
    background: linear-gradient(180deg, rgba(245,241,232,.92), rgba(245,241,232,.80));
    border-radius: 18px;
}

/* 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; }
}