:root {
    --color-primary: #7c3aed;
    --color-primary-dark: #4c1d95;
    --color-accent: #f59e0b;
    --color-surface: #ffffff;
    --color-text: #1c1917;
    --color-bg: #f5f5f4;
    --rgb-primary: 124,58,237;
    --rgb-accent: 245,158,11;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 22px;
    --shadow-sm: 0 1px 2px rgba(28,25,23,.05), 0 0 12px rgba(var(--rgb-accent), .15);
    --shadow-md: 0 4px 8px rgba(28,25,23,.06), 0 12px 24px -6px rgba(var(--rgb-primary), .18), 0 0 24px rgba(var(--rgb-accent), .35);
    --shadow-lg: 0 8px 16px rgba(28,25,23,.08), 0 24px 40px -8px rgba(var(--rgb-primary), .24), 0 0 32px rgba(var(--rgb-accent), .5);
    --space-section: 3.5rem;
    --space-card: 1.25rem;
    --space-gap: 1.5rem;
    --transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    --heading-weight: 600;
    --body-line-height: 1.6;
}

@keyframes variantCardGlow {
    0%, 100% { box-shadow: var(--shadow-md); }
    50% { box-shadow: 0 0 32px rgba(var(--rgb-accent), .55), 0 16px 32px -8px rgba(var(--rgb-primary), .25); }
}

body {
    color: var(--color-text);
    background-color: var(--color-bg);
    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: var(--shadow-md);
    padding: var(--space-card);
    transition: var(--transition);
    background: linear-gradient(145deg, #ecfeff, #f0fdfa);
    color: var(--color-text);
    animation: variantCardGlow 4s ease-in-out infinite;
}

.btn, button[class*="btn"], a[class*="btn"] {
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

a:not([class]) {
    color: var(--color-primary);
    transition: var(--transition);
    text-shadow: 0 0 12px rgba(var(--rgb-accent), .25);
}

/* ========== 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;
    background: linear-gradient(145deg, #ede9fe, #ddd6fe);
}

/* features: centered */
.feature-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: calc(var(--space-gap) * 2);
    max-width: 720px;
    margin: 0 auto;
}

/* hero: minimal */
.hero { padding: 2.25rem 0; }
.hero-content { max-width: 560px; }

/* testimonials: stacked */
.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-gap);
    max-width: 720px;
    margin: 0 auto;
}

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

/* faq: single-column */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

/* stats: inline */
.stats-grid {
    display: flex;
    justify-content: center;
    gap: 3.25rem;
}

/* cta: card-style */
.cta-inner {
    background: linear-gradient(145deg, #fffbeb, #fde68a);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

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

/* 条件性装饰 */
.hero, [class*="hero"], section:first-of-type {
    background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 55%, #f59e0b 120%);
    color: var(--color-surface);
}

.card {
    border: 1px solid rgba(var(--rgb-accent), .25);
}

/* 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: 2.25rem;
        --space-card: 1.1rem;
        --space-gap: 0.9rem;
    }
    .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; }
}