:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #fbbf24;
    --color-surface: #0f0f1a;
    --color-text: #e9e4f5;
    --rgb-primary: 124,58,237;
    --rgb-accent: 251,191,36;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 10px rgba(var(--rgb-primary),.28), 0 1px 3px rgba(0,0,0,.35);
    --shadow-md: 0 8px 28px rgba(var(--rgb-primary),.22), 0 3px 10px rgba(0,0,0,.30);
    --shadow-lg: 0 20px 48px rgba(var(--rgb-accent),.18), 0 8px 24px rgba(var(--rgb-primary),.12);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.75;
}

/* 基础覆盖 */
body { color: var(--color-text); line-height: var(--body-line-height); background: radial-gradient(circle at 50% 0%, #1a1330 0%, #0f0f1a 55%, #08070f 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); color: #f5f0ff; text-shadow: 0 2px 18px rgba(var(--rgb-primary),.35); }
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: linear-gradient(150deg, #1c1633 0%, #14102a 45%, #0f0c22 100%); border: 1px solid transparent; border-image: linear-gradient(135deg, rgba(var(--rgb-primary),.55), rgba(var(--rgb-accent),.35), rgba(var(--rgb-primary),.15)) 1; }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; border: 1px solid rgba(var(--rgb-accent),.25); box-shadow: 0 4px 18px rgba(var(--rgb-primary),.35); }
a:not([class]) { color: var(--color-accent); transition: var(--transition); }

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

/* news: masonry-2 */
/* 两列瀑布流 */
                .news-grid { column-count: 2; column-gap: var(--space-gap); }
                .news-grid .card { break-inside: avoid; margin-bottom: var(--space-gap); }

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

/* hero: minimal */
.hero { padding: 2rem 0; background: radial-gradient(ellipse at 50% 30%, rgba(var(--rgb-primary),.22) 0%, rgba(var(--rgb-accent),.06) 40%, transparent 70%); } .hero-content { max-width: 560px; }

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

/* partners: centered */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; }

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

/* 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; background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* cta: split */
.cta-inner { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2rem; background: linear-gradient(120deg, rgba(var(--rgb-primary),.18) 0%, rgba(var(--rgb-accent),.10) 100%); border-radius: var(--radius-xl); padding: 2rem; }

/* Page Layout: narrow-centered */
/* 窄版居中 */
            .page-main { max-width: 860px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: 0 24px 56px rgba(var(--rgb-accent),.22), 0 10px 28px rgba(var(--rgb-primary),.18); }
a:not([class]):hover { color: var(--color-primary); text-shadow: 0 0 14px rgba(var(--rgb-primary),.55); }
header, .header, .navbar { box-shadow: 0 4px 22px rgba(var(--rgb-primary),.20), 0 1px 4px rgba(0,0,0,.45); background: linear-gradient(180deg, #17122b 0%, #100c20 100%); }

/* 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; }
}