:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #3b0764;
    --color-accent: #fbbf24;
    --color-surface: #f6f3ff;
    --color-text: #efeef6;
    --rgb-primary: 109,40,217;
    --rgb-accent: 251,191,36;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 0 rgba(255,255,255,.05);
    --shadow-md: 0 10px 30px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.28);
    --shadow-lg: 0 28px 70px rgba(0,0,0,.55), 0 10px 30px rgba(0,0,0,.35);
    --space-section: 3.25rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 320ms cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(1200px 600px at 50% -10%, rgba(var(--rgb-accent), .14), transparent 60%),
        radial-gradient(900px 520px at 12% 10%, rgba(var(--rgb-primary), .18), transparent 55%),
        radial-gradient(900px 520px at 88% 20%, rgba(168,85,247,.12), transparent 55%),
        linear-gradient(180deg, #0f0f1a 0%, #0a0a13 70%, #080812 100%);
}

h1, h2, h3, h4 { font-weight: var(--heading-weight); }

section, .section {
    padding-top: calc(var(--space-section) + 0.5rem);
    padding-bottom: calc(var(--space-section) + 0.5rem);
}

.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 1px 0 rgba(255,255,255,.06),
        0 18px 48px rgba(0,0,0,.38),
        0 8px 22px rgba(17,17,27,.32);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(120% 120% at 10% 0%, rgba(var(--rgb-accent), .12), transparent 55%),
        radial-gradient(120% 120% at 90% 10%, rgba(var(--rgb-primary), .14), transparent 60%),
        linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
    border: 1px solid rgba(251,191,36,.14);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition), border-color var(--transition);
}

a:not([class]) {
    color: var(--color-accent);
    transition: var(--transition);
    text-shadow: 0 0 18px rgba(var(--rgb-accent), .25);
}

a:not([class]):hover {
    color: #fff2c2;
    text-shadow: 0 0 22px rgba(var(--rgb-accent), .35), 0 0 2px rgba(255,255,255,.2);
}

.card {
    border: 1px solid rgba(var(--rgb-primary), .14);
    background-clip: padding-box;
}

/* ========== 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-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

/* hero: split */
/* 左文右图 */
                .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

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

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 22s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

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

/* stats: grid-4 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-gap); text-align: center; }

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

/* 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: 2.25rem; --space-card: 1.1rem; --space-gap: 0.9rem; }
    .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; }
}