:root {
    --color-primary: #6d28d9;
    --color-primary-dark: #4c1d95;
    --color-accent: #22c55e;
    --color-surface: #fefce8;
    --color-text: #0b1220;
    --rgb-primary: 109,40,217;
    --rgb-accent: 34,197,94;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-xl: 36px;
    --shadow-sm: 0 10px 24px rgba(109, 40, 217, .14);
    --shadow-md: 0 18px 40px rgba(0, 0, 0, .12), 0 2px 0 rgba(34, 197, 94, .35);
    --shadow-lg: -10px 18px 60px rgba(109, 40, 217, .22), 0 14px 28px rgba(0, 0, 0, .14), 0 2px 0 rgba(34, 197, 94, .35);
    --space-section: 2rem;
    --space-card: 1rem;
    --space-gap: 0.75rem;
    --transition: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
}

body { 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); }
.card, [class*="card"] {
    border-radius: var(--radius-lg);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, .55) inset,
        0 -1px 0 rgba(0, 0, 0, .08) inset,
        0 18px 42px rgba(0, 0, 0, .12),
        0 2px 0 rgba(34, 197, 94, .35);
    padding: var(--space-card);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        filter var(--transition);
}
a:not([class]) { color: var(--color-primary); transition: var(--transition); }

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

/* news: grid-3 */
/* 三列等宽网格 */
                .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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: centered */
.hero-content { text-align: center; max-width: 800px; margin: 0 auto; }

/* testimonials: grid-3 */
.testimonial-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 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: two-column */
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-gap); }

/* stats: grid-3 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); text-align: center; }

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(1200px 420px at 10% 0%, rgba(34, 197, 94, .26) 0%, rgba(34, 197, 94, 0) 58%),
        linear-gradient(135deg, #fefce8 0%, #f5f3ff 45%, #eefdf6 100%);
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 1px 0 rgba(255, 255, 255, .65) inset,
        0 -1px 0 rgba(0, 0, 0, .06) inset,
        0 22px 60px rgba(109, 40, 217, .12),
        0 10px 24px rgba(34, 197, 94, .10);
}

/* Page Layout: full-width */
/* 无侧边栏, 全宽 */
            .page-main { max-width: 1200px; margin: 0 auto; }

/* 条件性装饰 */
.card:hover, [class*="card"]:hover {
    transform: translateY(-6px);
    box-shadow:
        -14px 24px 78px rgba(109, 40, 217, .28),
        0 18px 44px rgba(0, 0, 0, .16),
        0 2px 0 rgba(34, 197, 94, .45);
}
a:not([class]):hover { color: var(--color-accent); }
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 460px at 18% 20%, rgba(34, 197, 94, .24) 0%, rgba(34, 197, 94, 0) 55%),
        radial-gradient(680px 360px at 78% 18%, rgba(109, 40, 217, .38) 0%, rgba(109, 40, 217, 0) 60%),
        linear-gradient(135deg, #4c1d95 0%, #6d28d9 35%, #0ea5e9 100%);
}
.card { border: 1px solid rgba(var(--rgb-primary), .18); }

/* 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; }
}