:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #c084fc;
    --color-surface: #0f0f1a;
    --color-text: #ede9fe;
    --rgb-primary: 124,58,237;
    --rgb-accent: 192,132,252;
    --radius-sm: 12px;
    --radius-md: 22px;
    --radius-lg: 36px;
    --radius-xl: 48px;
    --shadow-sm: 0 2px 8px rgba(124,58,237,.18), 0 1px 3px rgba(15,15,26,.4);
    --shadow-md: 0 8px 24px rgba(124,58,237,.22), 0 4px 10px rgba(15,15,26,.5), inset 0 1px 0 rgba(192,132,252,.15);
    --shadow-lg: 0 16px 48px rgba(76,29,149,.35), 0 8px 20px rgba(15,15,26,.6), inset 0 1px 0 rgba(192,132,252,.2);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.7;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(ellipse at 50% 0%, #1a1030 0%, #0f0f1a 60%, #08080f 100%); caret-color: #c084fc; accent-color: #7c3aed; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 2px 16px rgba(124,58,237,.35); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background: linear-gradient(145deg, rgba(124,58,237,.12) 0%, rgba(76,29,149,.08) 40%, rgba(15,15,26,.6) 100%); border: 1px solid rgba(192,132,252,.18); }
.card:hover, [class*="card"]:hover { box-shadow: var(--shadow-lg); border-color: rgba(192,132,252,.4); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #c084fc 100%); color: #faf5ff; border: 1px solid rgba(192,132,252,.3); box-shadow: 0 4px 16px rgba(124,58,237,.4); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 8px 28px rgba(168,85,247,.55); filter: brightness(1.12); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-shadow: 0 0 12px rgba(192,132,252,.4); }
a:not([class]):hover { color: #e9d5ff; text-shadow: 0 0 20px rgba(233,213,255,.6); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

/* features: grid-4 */
.feature-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); }

/* 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 30% 50%, rgba(124,58,237,.3) 0%, rgba(76,29,149,.15) 40%, transparent 70%), linear-gradient(180deg, #0f0f1a 0%, #1a1030 100%); }
                .hero-content { position: relative; z-index: 1; text-shadow: 0 4px 24px rgba(15,15,26,.8); }

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

/* stats: big-number */
/* 大数字居中 */
                .stats-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }
                .stats-grid .stat-value { font-size: 3rem; background: linear-gradient(135deg, #c084fc 0%, #7c3aed 50%, #4c1d95 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; filter: drop-shadow(0 4px 12px rgba(124,58,237,.5)); }

/* cta: full-bg */
.cta-section { background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 40%, #a855f7 70%, #c084fc 100%); color: #faf5ff; padding: 4rem 2rem; box-shadow: inset 0 0 80px rgba(15,15,26,.4); }

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

/* 条件性装饰 */
header, .header, .navbar { background: transparent; backdrop-filter: blur(12px); }

/* 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; }
}