:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #f59e0b;
    --color-surface: #f5f3ff;
    --color-text: #23122a;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 36px;
    --shadow-sm: 0 10px 24px rgba(13, 7, 24, .10);
    --shadow-md: 0 18px 45px rgba(8, 4, 16, .18), 0 2px 0 rgba(255, 255, 255, .05) inset;
    --shadow-lg: 0 28px 75px rgba(6, 3, 14, .28), 0 10px 25px rgba(124, 58, 237, .12), 0 2px 0 rgba(255, 255, 255, .06) inset;
    --space-section: 6rem;
    --space-card: 2.25rem;
    --space-gap: 2rem;
    --transition: 520ms cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.75;
    --accent-glow: rgba(245, 158, 11, .40);
    --primary-glow: rgba(124, 58, 237, .40);
    --stage: #0f0f1a;
    --stage-2: #0b0b14;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(1200px 600px at 50% -10%, rgba(124, 58, 237, .18), rgba(15, 15, 26, 0) 60%), radial-gradient(900px 500px at 15% 0%, rgba(245, 158, 11, .12), rgba(15, 15, 26, 0) 55%), linear-gradient(180deg, var(--stage) 0%, var(--stage-2) 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 1px 0 rgba(255,255,255,.06), 0 12px 40px rgba(124, 58, 237, .18); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); background: transparent; }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: 0 1px 0 rgba(255,255,255,.08) inset, 0 22px 55px rgba(0,0,0,.22), 0 10px 24px rgba(124, 58, 237, .12); padding: var(--space-card); transition: transform var(--transition), box-shadow calc(var(--transition) * 1.05), border-color var(--transition), background var(--transition); border: 1px solid rgba(255,255,255,.08); background:
    radial-gradient(900px 260px at 20% 0%, rgba(245,158,11,.10), rgba(255,255,255,0) 55%),
    radial-gradient(700px 240px at 90% 5%, rgba(124,58,237,.18), rgba(255,255,255,0) 60%),
    linear-gradient(180deg, rgba(255,255,255,.06) 0%, rgba(255,255,255,.02) 100%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition), filter var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-shadow: 0 0 0 rgba(0,0,0,0); }
a:not([class]):hover { color: #8b5cf6; text-shadow: 0 0 22px rgba(124,58,237,.28); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* 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(900px 460px at 50% 25%, rgba(124,58,237,.18), rgba(15,15,26,0) 60%),
    radial-gradient(700px 420px at 20% 10%, rgba(245,158,11,.10), rgba(15,15,26,0) 55%),
    linear-gradient(180deg, rgba(15,15,26,.4) 0%, rgba(11,11,20,.65) 100%); }
                .hero-content { position: relative; z-index: 1; }

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

/* partners: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }
.stats-grid .stat, .stats-grid [class*="stat"], .stats-grid .card, .stats-grid [class*="card"] { border-radius: var(--radius-md); }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; }

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 960px; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-6px); box-shadow: 0 1px 0 rgba(255,255,255,.10) inset, 0 30px 85px rgba(0,0,0,.30), 0 18px 44px rgba(124,58,237,.18), 0 0 0 1px rgba(245,158,11,.08) inset; border-color: rgba(245,158,11,.22); }
.card { border-left: 4px solid var(--color-primary); background-image:
    radial-gradient(900px 260px at 20% 0%, rgba(245,158,11,.10), rgba(255,255,255,0) 55%),
    radial-gradient(700px 240px at 90% 5%, rgba(124,58,237,.18), rgba(255,255,255,0) 60%); }

/* 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: 2.6rem; --space-card: 1.2rem; --space-gap: 1.1rem; --radius-lg: 22px; --radius-md: 16px; }
    .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; }
}