:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #2e1065;
    --color-accent: #fbbf24;
    --color-surface: #0f0f1a;
    --color-text: #e8e4f0;
    --rgb-primary: 124,58,237;
    --rgb-accent: 251,191,36;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 6px rgba(124,58,237,.18), 0 1px 2px rgba(15,15,26,.4);
    --shadow-md: 0 6px 24px rgba(124,58,237,.22), 0 2px 8px rgba(251,191,36,.08);
    --shadow-lg: 0 12px 48px rgba(46,16,101,.35), 0 4px 16px rgba(124,58,237,.18);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: linear-gradient(160deg, #0f0f1a 0%, #1a1030 45%, #0f0f1a 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(120deg, #e8e4f0 0%, #fbbf24 60%, #c4b5fd 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,.08) 0%, transparent 70%); }
.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(30,20,55,.92) 0%, rgba(20,14,40,.96) 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(124,58,237,.5), rgba(251,191,36,.3), rgba(124,58,237,.15)) 1; }
.card:hover, [class*="card"]:hover { box-shadow: var(--shadow-lg); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #6d28d9 100%); color: #f5f3ff; border: 1px solid rgba(251,191,36,.25); box-shadow: 0 2px 12px rgba(124,58,237,.35); }
.btn:hover, button[class*="btn"]:hover, a[class*="btn"]:hover { box-shadow: 0 6px 28px rgba(124,58,237,.5), 0 0 0 3px rgba(251,191,36,.15); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); text-decoration-color: rgba(251,191,36,.4); }
a:not([class]):hover { color: #fcd34d; text-shadow: 0 0 18px rgba(251,191,36,.4); }

/* ========== 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-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 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% 40%, rgba(124,58,237,.25) 0%, rgba(15,15,26,.95) 65%), linear-gradient(180deg, #0f0f1a 0%, #1a1030 100%); }
                .hero-content { position: relative; z-index: 1; text-shadow: 0 2px 24px rgba(15,15,26,.7); }

/* 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* 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(180deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-shadow: none; filter: drop-shadow(0 4px 16px rgba(251,191,36,.3)); }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; background: linear-gradient(135deg, rgba(124,58,237,.12) 0%, rgba(251,191,36,.06) 100%); border-radius: var(--radius-xl); padding: 2rem; box-shadow: 0 0 60px rgba(124,58,237,.12) inset; }

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

/* 条件性装饰 */

/* 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; }
}