:root {
    --color-primary: #2f4cff;
    --color-primary-dark: #141a3a;
    --color-accent: #7c3aed;
    --color-surface: #fef3c7;
    --color-text: #121a2b;
    --rgb-primary: 47,76,255;
    --rgb-accent: 124,58,237;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 0 rgba(18,26,43,.10), 0 6px 18px rgba(18,26,43,.10);
    --shadow-md: 0 10px 22px rgba(8,12,24,.14), 0 2px 6px rgba(8,12,24,.10), inset 0 1px 0 rgba(255,255,255,.25);
    --shadow-lg: 0 18px 38px rgba(8,12,24,.18), 0 4px 10px rgba(8,12,24,.12), inset 0 1px 0 rgba(255,255,255,.22);
    --space-section: 3rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.52s cubic-bezier(0.2, 0.85, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); }
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 18px 40px rgba(8,12,24,.16), 0 3px 10px rgba(8,12,24,.10), 0 0 0 1px rgba(255,255,255,.35) inset; padding: var(--space-card); transition: var(--transition); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

:root {
    accent-color: var(--color-accent);
    caret-color: var(--color-accent);
}

/* ========== 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: grid-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: overlay */
/* 全屏背景+文字覆盖 */
                .hero { position: relative; min-height: 70vh; display: flex; align-items: center; }
                .hero-content { position: relative; z-index: 1; }

/* testimonials: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

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

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

/* stats: inline */
/* 水平排列 */
                .stats-grid { display: flex; justify-content: center; gap: 3rem; }

/* cta: full-bg */
.cta-section { 
    background: linear-gradient(135deg, #2f4cff 0%, #2b2a7a 38%, #141a3a 100%);
    color: #ffffff; 
    padding: 4rem 2rem; 
    box-shadow: inset 0 1px 0 rgba(255,255,255,.22);
}

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type { 
    background: radial-gradient(1100px 520px at 10% 10%, rgba(124,58,237,.22) 0%, rgba(124,58,237,0) 55%),
                radial-gradient(900px 520px at 90% 25%, rgba(47,76,255,.22) 0%, rgba(47,76,255,0) 58%),
                linear-gradient(135deg, #fef3c7 0%, #e9f7ff 22%, #2f4cff 62%, #141a3a 100%);
}

/* Keep any header/nav transparency but add subtle visual separation through shadow */
header, .header, .navbar { background: transparent; box-shadow: 0 1px 0 rgba(255,255,255,.18); }

/* 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; }
}