:root {
    --color-primary: #7c2d12;
    --color-primary-dark: #3b1209;
    --color-accent: #0ea5e9;
    --color-surface: #f5f7ff;
    --color-text: #140b0a;
    --rgb-primary: 124,45,18;
    --rgb-accent: 14,165,233;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 6px rgba(17, 24, 39, 0.10), 0 10px 18px rgba(17, 24, 39, 0.06);
    --shadow-md: 0 4px 10px rgba(17, 24, 39, 0.08), 0 18px 34px -12px rgba(17, 24, 39, 0.22);
    --shadow-lg: 0 10px 24px rgba(17, 24, 39, 0.12), 0 26px 55px -22px rgba(17, 24, 39, 0.28);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.38s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.6;
    --card-glow: rgba(14, 165, 233, 0.22);
    --card-outline: rgba(124, 45, 18, 0.26);
}

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-xl);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.65) inset,
        0 10px 25px -16px rgba(14,165,233,0.25),
        0 4px 12px rgba(17, 24, 39, 0.10),
        0 20px 40px -10px rgba(17, 24, 39, 0.18);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition), filter var(--transition);
    background:
        radial-gradient(1200px 300px at 20% 0%, rgba(14,165,233,0.14), rgba(14,165,233,0) 55%),
        linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.75));
    border: 1px solid rgba(124,45,18,0.12);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,0.6) inset,
        0 10px 22px -16px rgba(14,165,233,0.35),
        0 4px 12px rgba(17, 24, 39, 0.10);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 1px 0 rgba(255,255,255,0.35); }

.card { border-left: 3px solid var(--color-primary); }
header, .header, .navbar { background: transparent; }

a:not([class]):hover { color: var(--color-accent); text-shadow: 0 0 18px var(--card-glow); filter: saturate(1.05); }

@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; }
}

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

/* news: list-view */
/* 列表模式 (图左文右) */
                .news-grid { display: flex; flex-direction: column; gap: var(--space-gap); }
                .news-grid .card { display: grid; grid-template-columns: 280px 1fr; }

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

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

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

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }