:root {
    --color-primary: #5b1b7a;
    --color-primary-dark: #2a0b3a;
    --color-accent: #22c55e;
    --color-surface: #f3f6ff;
    --color-text: #160a18;
    --rgb-primary: 91,27,122;
    --rgb-accent: 34,197,94;
    --radius-sm: 2px;
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-xl: 18px;
    --shadow-sm: 0 1px 0 rgba(0,0,0,.06), 0 8px 18px rgba(91,27,122,.10);
    --shadow-md: 0 2px 0 rgba(255,255,255,.55) inset, 0 10px 26px rgba(18,9,25,.12), 0 1px 0 rgba(0,0,0,.06);
    --shadow-lg: 0 2px 0 rgba(255,255,255,.6) inset, 0 22px 48px rgba(18,9,25,.16), 0 6px 14px rgba(91,27,122,.14);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.52s cubic-bezier(0.2, 0.9, 0.2, 1);
    --heading-weight: 800;
    --body-line-height: 1.65;
    --shadow-ring: 0 0 0 4px rgba(34,197,94,.18), 0 0 0 1px rgba(91,27,122,.18);
}

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,.7) inset,
        0 14px 30px rgba(18,9,25,.12),
        0 2px 10px rgba(91,27,122,.14);
    padding: var(--space-card);
    transition: var(--transition);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
}
a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 1px 0 rgba(255,255,255,.65);
}

/* ========== 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: grid-3 */
.feature-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-gap); }

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

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

/* cta: card-style */
.cta-inner {
    background:
        radial-gradient(900px 220px at 20% 0%, rgba(34,197,94,.22), transparent 55%),
        radial-gradient(700px 240px at 90% 10%, rgba(91,27,122,.28), transparent 55%),
        linear-gradient(135deg, rgba(243,246,255,1), rgba(243,246,255,.88));
    border-radius: var(--radius-xl);
    padding: 3rem;
    text-align: center;
    box-shadow:
        0 1px 0 rgba(255,255,255,.85) inset,
        0 18px 38px rgba(18,9,25,.14),
        0 1px 0 rgba(0,0,0,.04);
}

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

/* 条件性装饰 */
a:not([class]):hover {
    color: var(--color-accent);
    text-shadow: 0 0 18px rgba(34,197,94,.25), 0 1px 0 rgba(255,255,255,.65);
}
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 360px at 20% 10%, rgba(34,197,94,.26), transparent 55%),
        radial-gradient(780px 320px at 90% 20%, rgba(91,27,122,.42), transparent 60%),
        linear-gradient(135deg, #5b1b7a 0%, #2a0b3a 55%, #0b0a14 100%);
    box-shadow:
        0 1px 0 rgba(255,255,255,.08) inset,
        0 26px 70px rgba(0,0,0,.18);
}
.card { border: 1px solid rgba(var(--rgb-primary), .14); }
header, .header, .navbar {
    box-shadow:
        0 1px 0 rgba(255,255,255,.65) inset,
        0 10px 28px rgba(18,9,25,.12),
        0 1px 0 rgba(0,0,0,.05);
}

/* 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; --radius-lg: 10px; --radius-xl: 14px; }
    .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; }
}