:root {
    --color-primary: #5b3df5;
    --color-primary-dark: #2a1a8c;
    --color-accent: #ff5c8a;
    --color-surface: #f4f2ff;
    --color-text: #1a1333;
    --rgb-primary: 91,61,245;
    --rgb-accent: 255,92,138;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 26px;
    --shadow-sm: 0 2px 6px rgba(91,61,245,.10), 0 1px 2px rgba(255,92,138,.06);
    --shadow-md: 0 6px 18px rgba(91,61,245,.12), 0 2px 6px rgba(255,92,138,.08);
    --shadow-lg: 0 16px 34px rgba(91,61,245,.16), 0 6px 14px rgba(255,92,138,.12), 0 2px 4px rgba(42,26,140,.08);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.55s 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: linear-gradient(160deg, #faf8ff 0%, #f4f2ff 45%, #fdf0f5 100%); }
h1, h2, h3, h4 { font-weight: var(--heading-weight); background: linear-gradient(90deg, #5b3df5 0%, #a05cff 55%, #ff5c8a 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
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(180deg, #ffffff 0%, #fbf9ff 100%); border: 1px solid rgba(91,61,245,.08); }
.btn, button[class*="btn"], a[class*="btn"] { border-radius: var(--radius-md); transition: var(--transition); background: linear-gradient(135deg, #5b3df5 0%, #8a5cff 50%, #ff5c8a 100%); color: #ffffff; box-shadow: 0 6px 16px rgba(91,61,245,.28); }
a:not([class]) { color: var(--color-primary); 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: horizontal */
/* 水平滚动 */
                .feature-list { display: flex; gap: var(--space-gap); overflow-x: auto; scroll-snap-type: x mandatory; }
                .feature-list > * { flex: 0 0 300px; scroll-snap-align: start; }

/* 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: grid-4 */
.partner-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 1.5); align-items: center; }

/* 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(120deg, #5b3df5 0%, #a05cff 50%, #ff5c8a 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* cta: centered */
.cta-inner { text-align: center; max-width: 700px; margin: 0 auto; }

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

/* 条件性装饰 */
.card:hover, [class*="card"]:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(255,92,138,.22); }
a:not([class]):hover { color: var(--color-accent); }
header, .header, .navbar { box-shadow: 0 4px 16px rgba(91,61,245,.10), 0 1px 3px rgba(255,92,138,.08); background: linear-gradient(90deg, #ffffff 0%, #faf8ff 60%, #fdf0f5 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; }
}