:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #c4b5fd;
    --color-surface: #f5f3ff;
    --color-text: #1e1b2e;
    --rgb-primary: 124,58,237;
    --rgb-accent: 196,181,253;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(15,15,26,.06), 0 1px 2px rgba(124,58,237,.08);
    --shadow-md: 0 4px 8px rgba(15,15,26,.05), 0 20px 40px -10px rgba(15,15,26,.12);
    --shadow-lg: 0 8px 16px rgba(15,15,26,.06), 0 32px 64px -16px rgba(76,29,149,.18);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.4s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 600;
    --body-line-height: 1.7;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #0f0f1a; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #f5f3ff; text-shadow: 0 1px 2px rgba(124,58,237,.25); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background-color: #0f0f1a; }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: #f5f3ff; border: 1px solid rgba(124,58,237,.15); }
.card:hover, [class*="card"]:hover { box-shadow: var(--shadow-lg); border-color: rgba(196,181,253,.5); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-color: var(--color-primary); color: #f5f3ff; border-color: var(--color-primary-dark); box-shadow: 0 2px 6px rgba(124,58,237,.3), 0 8px 20px -6px rgba(124,58,237,.4); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { background-color: var(--color-primary-dark); box-shadow: 0 4px 10px rgba(124,58,237,.35), 0 16px 32px -8px rgba(76,29,149,.5); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); caret-color: var(--color-primary); }
a:not([class]):hover { color: #e9d5ff; text-shadow: 0 0 8px rgba(196,181,253,.5); }

/* ========== 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; background: radial-gradient(ellipse at 50% 40%, rgba(124,58,237,.18) 0%, rgba(15,15,26,1) 70%); }
                .hero-content { position: relative; z-index: 1; text-align: center; }

/* testimonials: carousel */
/* 单条轮播 */
                .testimonial-list { display: flex; overflow: hidden; } 
                .testimonial-list > * { flex: 0 0 100%; }

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

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 50%, #a78bfa 100%); color: #f5f3ff; padding: 4rem 2rem; box-shadow: 0 4px 8px rgba(15,15,26,.05), 0 20px 40px -10px rgba(76,29,149,.35); border-radius: var(--radius-xl); }

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

/* 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; }
}