:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #2e1065;
    --color-accent: #d4af37;
    --color-surface: #1a1a2e;
    --color-text: #f5f3ff;
    --rgb-primary: 124,58,237;
    --rgb-accent: 212,175,55;
    --radius-sm: 10px;
    --radius-md: 20px;
    --radius-lg: 28px;
    --radius-xl: 40px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary),.28), 0 1px 3px rgba(15,15,26,.4);
    --shadow-md: 0 6px 24px rgba(var(--rgb-primary),.24), 0 2px 8px rgba(15,15,26,.35);
    --shadow-lg: 0 12px 48px rgba(var(--rgb-primary),.20), 0 4px 16px rgba(var(--rgb-accent),.10), 0 0 0 1px rgba(var(--rgb-primary),.08);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(.22,.61,.36,1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(160deg, #0f0f1a 0%, #1a1a2e 50%, #0f0f1a 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #f5f3ff; text-shadow: 0 1px 2px rgba(15,15,26,.6); }
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,.10) 0%, rgba(26,26,46,.95) 40%, rgba(15,15,26,.98) 100%); border: 1px solid rgba(var(--rgb-primary),.18); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #d4af37 100%); color: #0f0f1a; box-shadow: 0 4px 18px rgba(var(--rgb-primary),.35), 0 1px 4px rgba(var(--rgb-accent),.25); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-shadow: 0 1px 3px rgba(var(--rgb-accent),.20); }

/* ========== 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-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 50% 0%, rgba(124,58,237,.28) 0%, rgba(212,175,55,.08) 35%, rgba(15,15,26,.96) 70%, #0f0f1a 100%); }
                .hero-content { position: relative; z-index: 1; }

/* 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: 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; }

/* cta: card-style */
.cta-inner { background: linear-gradient(135deg, rgba(124,58,237,.22) 0%, rgba(212,175,55,.12) 50%, rgba(26,26,46,.95) 100%); border-radius: var(--radius-xl); padding: 3rem; text-align: center; box-shadow: 0 16px 56px rgba(var(--rgb-primary),.28), 0 0 0 1px rgba(var(--rgb-accent),.15), inset 0 1px 0 rgba(255,255,255,.06); }

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

/* 条件性装饰 */
header, .header, .navbar { box-shadow: 0 2px 12px rgba(15,15,26,.5), 0 1px 0 rgba(var(--rgb-accent),.15); background: linear-gradient(180deg, rgba(26,26,46,.98) 0%, rgba(15,15,26,.96) 100%); }

/* 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; }
}