:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f59e0b;
    --color-surface: #f5f3ff;
    --color-text: #312e81;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 34px;
    --radius-xl: 48px;
    --shadow-sm: 0 1px 3px rgba(76,29,149,.08), 0 6px 16px rgba(124,58,237,.10);
    --shadow-md: 0 8px 22px rgba(76,29,149,.10), 0 18px 44px rgba(109,40,217,.12);
    --shadow-lg: 0 16px 36px rgba(76,29,149,.12), 0 32px 80px rgba(245,158,11,.12);
    --space-section: 4rem;
    --space-card: 1.5rem;
    --space-gap: 1.25rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 700;
    --body-line-height: 1.6;
}

body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(circle at 8% 10%, rgba(196,181,253,.22), transparent 32%),
        radial-gradient(circle at 92% 4%, rgba(252,211,77,.20), transparent 28%),
        linear-gradient(148deg, #faf7ff 0%, #e8e9ff 45%, #ffe9f2 100%);
}

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: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    color: #fff;
    background: linear-gradient(135deg, #7c3aed 0%, #c026d3 60%, #db2777 130%);
    box-shadow: 0 10px 24px -8px rgba(76,29,149,.60), 0 4px 10px rgba(76,29,149,.25);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-decoration-color: rgba(124,58,237,.35);
    text-underline-offset: 3px;
}

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

/* news: list-view */
.news-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
}

.news-grid .card {
    display: grid;
    grid-template-columns: 280px 1fr;
}

/* features: horizontal */
.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: left-aligned */
.hero-content {
    text-align: left;
    max-width: 600px;
}

/* testimonials: carousel */
.testimonial-list {
    display: flex;
    overflow: hidden;
}

.testimonial-list > * {
    flex: 0 0 100%;
}

/* partners: grid-6 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-gap);
    align-items: center;
}

/* faq: with-sidebar */
.faq-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

/* stats: big-number */
.stats-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.stats-grid .stat-value {
    font-size: 3rem;
}

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

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

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-decoration-color: rgba(245,158,11,.55);
}

.card {
    border-left: 3px solid var(--color-primary);
    background:
        radial-gradient(circle at 100% 0%, rgba(251,191,36,.18), transparent 46%),
        linear-gradient(150deg, rgba(255,255,255,.98) 0%, rgba(243,232,255,.88) 100%);
    box-shadow:
        var(--shadow-md),
        inset 0 1px 0 rgba(255,255,255,.75);
}

/* 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;
    }
}