:root {
    --color-primary: #8b5cf6;
    --color-primary-dark: #4c1d95;
    --color-accent: #f3c46a;
    --color-surface: #17122b;
    --color-text: #ece9f6;
    --rgb-primary: 139,92,246;
    --rgb-accent: 243,196,106;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 18px;
    --radius-xl: 26px;
    --shadow-sm: 0 1px 3px rgba(10,8,25,.65), 0 0 0 1px rgba(139,92,246,.08);
    --shadow-md: 0 10px 24px -12px rgba(8,5,24,.85), 0 2px 6px rgba(8,5,24,.55), inset 0 1px 0 rgba(243,196,106,.07);
    --shadow-lg: 0 24px 52px -20px rgba(76,29,149,.9), 0 0 0 1px rgba(243,196,106,.2), 0 0 36px -10px rgba(139,92,246,.5);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background-color: #0f0f1a; background-image: radial-gradient(ellipse 90% 55% at 50% -8%, rgba(124,58,237,.38), rgba(124,58,237,0) 70%), radial-gradient(ellipse 70% 45% at 50% 112%, rgba(243,196,106,.14), rgba(243,196,106,0) 72%), linear-gradient(180deg, #0f0f1a 0%, #15102a 52%, #0c0a15 100%); background-attachment: fixed; }
h1, h2, h3, h4 { font-weight: var(--heading-weight); text-shadow: 0 2px 18px rgba(139,92,246,.28), 0 0 1px rgba(243,196,106,.25); }
section, .section { padding-top: var(--space-section); padding-bottom: var(--space-section); }
.card, [class*="card"] { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: var(--space-card); transition: var(--transition); background-color: rgba(23,18,43,.72); background-image: linear-gradient(158deg, rgba(139,92,246,.18) 0%, rgba(23,18,43,.94) 46%, rgba(12,10,24,.97) 100%), radial-gradient(circle at 88% 6%, rgba(243,196,106,.16), rgba(243,196,106,0) 58%); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background-image: linear-gradient(135deg, #a78bfa 0%, #7c3aed 42%, #4c1d95 78%, #d9b06a 130%); color: #fdfbff; box-shadow: 0 10px 26px -12px rgba(124,58,237,.9), inset 0 1px 0 rgba(255,255,255,.18); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: featured-top */
/* 首篇横跨全宽 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }
                .news-grid > *:first-child { grid-column: span 3; }

/* 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: masonry */
.testimonial-list { column-count: 2; column-gap: var(--space-gap); }
                .testimonial-list > * { break-inside: avoid; margin-bottom: var(--space-gap); }

/* 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: 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; color: var(--color-accent); text-shadow: 0 0 26px rgba(243,196,106,.45); }

/* cta: full-bg */
.cta-section { background-color: var(--color-primary-dark); background-image: linear-gradient(135deg, #4c1d95 0%, #7c3aed 44%, #b58bf5 82%, #f3c46a 128%); color: #fdfbff; padding: 4rem 2rem; box-shadow: inset 0 1px 0 rgba(243,196,106,.28), 0 30px 70px -34px rgba(124,58,237,.9); }

/* Page Layout: wide */
/* 超宽 */
            .page-main { max-width: 1280px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
a:not([class]):hover { color: var(--color-primary); }
.card { border-left: 3px solid var(--color-accent); }
header, .header, .navbar { box-shadow: 0 12px 32px -18px rgba(8,5,24,.95), 0 1px 0 rgba(243,196,106,.16), inset 0 -1px 0 rgba(139,92,246,.22); background-image: linear-gradient(180deg, rgba(21,16,42,.92), rgba(15,15,26,.78)); backdrop-filter: blur(14px); }

/* 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; }
}