:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #c4b5fd;
    --color-surface: #fbf7ff;
    --color-text: #241029;
    --rgb-primary: 124,58,237;
    --rgb-accent: 196,181,253;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 10px rgba(15, 15, 26, .06);
    --shadow-md: 0 4px 14px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 30px -10px rgba(0,0,0,.22), 0 18px 70px -30px rgba(124,58,237,.25);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --heading-weight: 650;
    --body-line-height: 1.65;
}

body { color: var(--color-text); line-height: var(--body-line-height); background: #0f0f1a; }
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 4px 14px rgba(0,0,0,.10), 0 1px 0 rgba(255,255,255,.45) inset; padding: var(--space-card); transition: var(--transition); background: rgba(251,247,255,.92); border: 1px solid rgba(196,181,253,.22); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); }
a:not([class]) { color: var(--color-primary); transition: var(--transition); text-decoration-thickness: 1px; text-underline-offset: 3px; }
h1, h2, h3, h4, .hero-content { text-shadow: 0 10px 30px rgba(124,58,237,.12); }

.card:hover, [class*="card"]:hover { transform: translateY(-5px); box-shadow: 0 20px 60px -25px rgba(0,0,0,.35), 0 18px 70px -35px rgba(124,58,237,.35), 0 1px 0 rgba(255,255,255,.55) inset; }
a:not([class]):hover { color: var(--color-accent); text-shadow: 0 10px 30px rgba(196,181,253,.18); }
.card { border-left: 3px solid #7c3aed; border-left-color: var(--color-primary); }

header, .header, .navbar { box-shadow: 0 2px 10px rgba(0,0,0,.22), 0 1px 0 rgba(255,255,255,.06) inset; background: rgba(15,15,26,.4); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid rgba(196,181,253,.18); }

/* ========== 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-2 */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: calc(var(--space-gap) * 1.5); }

/* hero: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: stacked */
/* 垂直堆叠 */
                .testimonial-list { display: flex; flex-direction: column; gap: var(--space-gap); max-width: 720px; margin: 0 auto; }

/* partners: scroll */
/* 自动滚动 */
                .partner-grid { display: flex; gap: 2rem; overflow: hidden; animation: partnerScroll 20s linear infinite; }
                @keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* 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: 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: 1200px; 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: 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; }
}