:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #fbbf24;
    --color-surface: #f8fafc;
    --color-text: #1f1630;
    --rgb-primary: 124,58,237;
    --rgb-accent: 251,191,36;
    --radius-sm: 3px;
    --radius-md: 5px;
    --radius-lg: 6px;
    --radius-xl: 8px;
    --shadow-sm: 0 1px 0 rgba(0,0,0,.22), 0 0 0 1px rgba(255,255,255,.06);
    --shadow-md: 0 8px 18px rgba(0,0,0,.28), 0 2px 6px rgba(0,0,0,.16), 0 0 0 1px rgba(255,255,255,.06) inset;
    --shadow-lg: 0 14px 28px rgba(0,0,0,.34), 0 6px 14px rgba(0,0,0,.18), 0 0 0 1px rgba(255,255,255,.08) inset;
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 420ms cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background: radial-gradient(1200px 600px at 50% 0%, rgba(124,58,237,.10) 0%, rgba(124,58,237,0) 60%),
                radial-gradient(900px 500px at 20% 20%, rgba(251,191,36,.10) 0%, rgba(251,191,36,0) 55%),
                #0f0f1a;
    caret-color: var(--color-accent);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 1px 0 rgba(255,255,255,.08) inset,
        0 10px 22px rgba(0,0,0,.30),
        0 2px 8px rgba(0,0,0,.16);
    padding: var(--space-card);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background-color var(--transition), color var(--transition);
    background:
        linear-gradient(180deg, rgba(248,250,252,.96) 0%, rgba(248,250,252,.88) 100%);
    border: 1px solid rgba(255,255,255,.10);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), opacity var(--transition);
    box-shadow:
        0 1px 0 rgba(255,255,255,.14) inset,
        0 10px 22px rgba(0,0,0,.20);
    border: 1px solid rgba(255,255,255,.16);
    background: rgba(124,58,237,.95);
    color: #fff;
}
a:not([class]) {
    color: var(--color-primary);
    transition: color var(--transition), text-shadow var(--transition), opacity var(--transition);
    text-shadow: 0 0 0 rgba(0,0,0,0);
}
section:first-of-type { 
    background: radial-gradient(1200px 520px at 50% -10%, rgba(251,191,36,.18) 0%, rgba(251,191,36,0) 62%),
                radial-gradient(900px 480px at 20% 0%, rgba(124,58,237,.26) 0%, rgba(124,58,237,0) 55%),
                linear-gradient(135deg, #0b0b16, #0f0f1a 42%, #1a1233 100%);
}

/* ========== 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: centered */
/* 居中大卡片 */
                .feature-list { display: flex; flex-direction: column; align-items: center; gap: calc(var(--space-gap) * 2); max-width: 720px; margin: 0 auto; }

/* 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: 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-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(900px 420px at 15% 10%, rgba(251,191,36,.35) 0%, rgba(251,191,36,0) 55%),
        radial-gradient(900px 420px at 85% 0%, rgba(124,58,237,.55) 0%, rgba(124,58,237,0) 58%),
        linear-gradient(135deg, #5b21b6 0%, #7c3aed 38%, #2e1065 100%);
    color: #fff;
    padding: 4rem 2rem;
    box-shadow: 0 -1px 0 rgba(255,255,255,.08) inset, 0 18px 40px rgba(0,0,0,.28);
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(1100px 540px at 50% 0%, rgba(251,191,36,.18) 0%, rgba(251,191,36,0) 60%),
        radial-gradient(900px 460px at 10% 10%, rgba(124,58,237,.30) 0%, rgba(124,58,237,0) 55%),
        linear-gradient(135deg, #0f0f1a 0%, #0c0c16 40%, #1c1236 100%);
    color: var(--color-surface);
}
header, .header, .navbar { background: transparent; }

/* 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; }
}