/* ===== 区块样式 - GitHub 风格 ===== */

/* 统计数据区 */
.stats {
    padding: 4rem 0;
    background: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--text-secondary);
}

[data-theme="dark"] .stat-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    filter: grayscale(0.2);
}

.stat-number {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 特性区 */
.features {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3.5rem;
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--text-secondary);
}

[data-theme="dark"] .feature-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    display: block;
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* 分类快速入口 */
.categories-section {
    padding: 5rem 0;
    background: var(--bg-primary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--text-secondary);
}

[data-theme="dark"] .category-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.category-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.category-count {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--bg-primary);
    border-radius: 6px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    font-weight: 500;
    border: 1px solid var(--border-color);
}

/* 文档列表区 */
.docs-section {
    padding: 5rem 0;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.75rem;
}

.doc-card {
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.doc-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--text-secondary);
}

[data-theme="dark"] .doc-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.doc-card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.doc-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.doc-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.875rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.doc-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    flex-grow: 1;
}

.doc-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.doc-category {
    padding: 0.375rem 0.875rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-weight: 500;
}

.doc-views {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-weight: 500;
}

/* 快速开始区 */
.quick-start {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3.5rem;
}

.step-card {
    padding: 2.5rem 2rem;
    background: var(--bg-primary);
    border-radius: 12px;
    text-align: center;
    position: relative;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--text-secondary);
}

[data-theme="dark"] .step-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.step-number {
    width: 3.5rem;
    height: 3.5rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.step-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.step-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* 关于我们区 */
.about-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.about-content p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* 响应式 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .stats-grid,
    .features-grid,
    .categories-grid,
    .docs-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }
    
    .features h2,
    .about-content h2 {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .features,
    .categories-section,
    .docs-section,
    .about-section {
        padding: 3.5rem 0;
    }
    
    .stats {
        padding: 3rem 0;
    }
}