:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-accent: #60a5fa;
    --color-surface: #ffffff;
    --color-text: #f1f5f9;
    --rgb-primary: 59,130,246;
    --rgb-accent: 96,165,250;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 0 10px rgba(var(--rgb-accent), 0.3);
    --shadow-md: 0 0 20px rgba(var(--rgb-accent), 0.4);
    --shadow-lg: 0 0 30px rgba(var(--rgb-accent), 0.5);
    --space-section: 3.25rem;
    --space-card: 1.25rem;
    --space-gap: 1rem;
    --transition: 0.3s ease;
    --heading-weight: 600;
    --body-line-height: 1.65;
}

body { 
    color: var(--color-text); 
    line-height: var(--body-line-height); 
    background-color: #1e293b;
}

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-color: var(--color-surface);
    color: #1e293b;
    animation: glow-pulse 4s ease-in-out infinite;
}

.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); 
}

.card:hover {
    box-shadow: 0 0 32px rgba(var(--rgb-accent), 0.6);
    animation: glow-pulse 1.5s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(var(--rgb-accent), 0.4); }
    50% { box-shadow: 0 0 30px rgba(var(--rgb-accent), 0.6); }
}

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

/* hero: split */
.hero-inner { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 2rem; 
    align-items: center; 
}

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

/* partners: centered */
.partner-grid { 
    display: flex; 
    flex-wrap: wrap; 
    justify-content: center; 
    gap: 2rem; 
}

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

/* 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 */
.hero, [class*="hero"], section:first-of-type { 
    background: linear-gradient(135deg, #1e293b, #334155); 
}

header, .header, .navbar { 
    background: transparent; 
}

/* 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; }
}