:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #5b21b6;
    --color-accent: #f59e0b;
    --color-surface: #f5f3ff;
    --color-text: #201a2b;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 0 rgba(255, 255, 255, 0.65), 0 10px 24px rgba(20, 10, 40, 0.08);
    --shadow-md: 0 2px 0 rgba(255, 255, 255, 0.55), 0 16px 40px rgba(20, 10, 40, 0.12);
    --shadow-lg: 0 3px 0 rgba(255, 255, 255, 0.5), 0 26px 70px rgba(20, 10, 40, 0.18);
    --space-section: 5rem;
    --space-card: 2rem;
    --space-gap: 1.5rem;
    --transition: 0.52s cubic-bezier(.2,.85,.2,1);
    --heading-weight: 800;
    --body-line-height: 1.65;
    --sidebar-dark: #252e3a;
    --sidebar-accent: rgba(245, 158, 11, 0.95);
    --ring: rgba(124, 58, 237, 0.35);
}

/* 基础覆盖 */
body {
    color: var(--color-text);
    line-height: var(--body-line-height);
    background:
        radial-gradient(900px 520px at 18% 5%, rgba(124, 58, 237, 0.18) 0%, rgba(124, 58, 237, 0) 58%),
        radial-gradient(760px 420px at 88% 22%, rgba(245, 158, 11, 0.18) 0%, rgba(245, 158, 11, 0) 56%),
        linear-gradient(180deg, #fbfaff 0%, #f3f2ff 45%, #f7f7ff 100%);
    caret-color: var(--color-accent);
    accent-color: var(--color-accent);
}
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, 0.7),
        0 10px 26px rgba(20, 10, 40, 0.10),
        0 26px 70px rgba(20, 10, 40, 0.10);
    padding: var(--space-card);
    transition: var(--transition);
    background:
        radial-gradient(900px 240px at 18% -40%, rgba(124, 58, 237, 0.18) 0%, rgba(124, 58, 237, 0) 60%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(245, 243, 255, 0.88) 100%);
    border: 1px solid rgba(124, 58, 237, 0.12);
}
.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: 0 10px 26px rgba(124, 58, 237, 0.14);
}
a:not([class]) {
    color: #6d28d9;
    transition: var(--transition);
    text-shadow: 0 0.5px 0 rgba(255, 255, 255, 0.6);
}

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

/* news: grid-4 */
/* 四列紧凑网格 */
                .news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: calc(var(--space-gap) * 0.8); }

/* 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: carousel */
/* 单条轮播 */
                .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 左 + 联系信息右 */
                .faq-wrapper { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; }

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

/* cta: full-bg */
.cta-section {
    background:
        radial-gradient(1000px 520px at 18% 15%, rgba(245, 158, 11, 0.35) 0%, rgba(245, 158, 11, 0) 55%),
        radial-gradient(900px 520px at 85% 40%, rgba(124, 58, 237, 0.40) 0%, rgba(124, 58, 237, 0) 58%),
        linear-gradient(135deg, #5b21b6 0%, #7c3aed 45%, #f59e0b 100%);
    color: rgba(255,255,255,0.96);
    padding: 4rem 2rem;
    border-radius: var(--radius-xl);
    box-shadow:
        0 2px 0 rgba(255, 255, 255, 0.18),
        0 22px 70px rgba(91, 33, 182, 0.30);
    border: 1px solid rgba(245, 158, 11, 0.22);
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background:
        radial-gradient(900px 420px at 12% 0%, rgba(245, 158, 11, 0.28) 0%, rgba(245, 158, 11, 0) 58%),
        radial-gradient(840px 380px at 90% 20%, rgba(124, 58, 237, 0.30) 0%, rgba(124, 58, 237, 0) 55%),
        linear-gradient(135deg, #252e3a 0%, #1f2834 42%, #252e3a 100%);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.08),
        0 18px 60px rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(245, 158, 11, 0.14);
}
header, .header, .navbar {
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.6),
        0 14px 40px rgba(19, 7, 36, 0.12);
    border-bottom: 1px solid rgba(124, 58, 237, 0.14);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 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; }
}