:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #2dd4bf;
    --color-surface: #f5f3ff;
    --color-text: #1e1b4b;
    --rgb-primary: 109,40,217;
    --rgb-accent: 45,212,191;
    --radius-sm: 6px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 6px rgba(76,29,149,.08), 0 1px 2px rgba(109,40,217,.06), inset 0 1px 0 rgba(255,255,255,.5);
    --shadow-md: 0 12px 28px rgba(76,29,149,.14), 0 4px 12px rgba(109,40,217,.1), inset 0 1px 0 rgba(255,255,255,.7);
    --shadow-lg: 0 24px 48px rgba(76,29,149,.22), 0 12px 24px rgba(109,40,217,.14), inset 0 1px 0 rgba(255,255,255,.9);
    --space-section: 4.5rem;
    --space-card: 1.75rem;
    --space-gap: 1.5rem;
    --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.65;
}

/* 基础覆盖 */
body {
    background:
        radial-gradient(ellipse at 15% 0%, rgba(109,40,217,.14), transparent 55%),
        radial-gradient(ellipse at 85% 100%, rgba(45,212,191,.16), transparent 55%),
        linear-gradient(160deg, #eef2ff 0%, #faf5ff 35%, #f0fdfa 70%, #ecfeff 100%);
    color: var(--color-text);
    line-height: var(--body-line-height);
}
h1, h2, h3, h4 { font-weight: var(--heading-weight); }
section, .section {
    padding-top: var(--space-section);
    padding-bottom: var(--space-section);
    background: linear-gradient(180deg, rgba(255,255,255,.3), rgba(245,243,255,.06));
    box-shadow: inset 0 1px 0 rgba(109,40,217,.06);
}
.card, [class*="card"] {
    background: linear-gradient(145deg, #ffffff 0%, #f3e8ff 50%, #ede9fe 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md), inset 0 0 0 1px rgba(109,40,217,.1);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 45%, #4c1d95 100%);
    box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,.25), inset 0 -2px 4px rgba(0,0,0,.15);
    transition: var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    text-shadow: 0 1px 0 rgba(255,255,255,.5);
    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: 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: minimal */
.hero {
    padding: 2rem 0;
    background: radial-gradient(ellipse at 75% 20%, rgba(45,212,191,.15), transparent 65%);
}
.hero-content { max-width: 560px; }

/* 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: 2.25rem; overflow: hidden; animation: partnerScroll 26s linear infinite; }
@keyframes partnerScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* faq: with-sidebar */
/* FAQ 左 + 联系信息右 */
.faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2.25rem; }

/* 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: linear-gradient(120deg, #4c1d95 0%, #6d28d9 40%, #7c3aed 70%, #2dd4bf 130%);
    color: #fff;
    padding: 4rem 2rem;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.15), 0 24px 48px rgba(76,29,149,.25);
}

/* 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), inset 0 0 0 1px rgba(109,40,217,.22);
}
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 2px 10px rgba(45,212,191,.45);
}
header, .header, .navbar {
    background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(245,243,255,.82));
    backdrop-filter: blur(14px);
    box-shadow: 0 6px 20px rgba(76,29,149,.08), inset 0 -1px 0 rgba(109,40,217,.08);
}

/* 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; }
}