/* 博客专用样式 */
/* 博客头部样式 */
.blog-hero {
    background: linear-gradient(135deg, var(--primary-gradient));
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/blog-bg-pattern.svg') repeat;
    opacity: 0.1;
    z-index: 1;
}

.blog-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.blog-hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.blog-hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.blog-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 搜索和过滤样式 */
.blog-filters {
    padding: 2rem 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
}

.filter-bar {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 2;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    background: white;
    transition: all 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.category-filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 特色教程样式 */
.featured-tutorials {
    padding: 4rem 0;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.featured-card {
    display: flex;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.featured-image {
    position: relative;
    width: 200px;
    flex-shrink: 0;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.featured-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.featured-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.featured-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.featured-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
}

.featured-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.featured-link:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

/* 教程分类样式 */
.tutorial-categories {
    padding: 4rem 0;
    background: var(--bg-light);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.category-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.category-count {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9rem;
}

/* 教程列表样式 */
.all-tutorials {
    padding: 4rem 0;
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tutorial-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tutorial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.tutorial-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.tutorial-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.tutorial-card:hover .tutorial-image img {
    transform: scale(1.05);
}

.tutorial-content {
    padding: 1.5rem;
}

.tutorial-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.category {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category.beginner {
    background: #e8f5e8;
    color: #2d5a2d;
}

.category.intermediate {
    background: #fff3cd;
    color: #856404;
}

.category.advanced {
    background: #f8d7da;
    color: #721c24;
}

.category.api {
    background: #d1ecf1;
    color: #0c5460;
}

.category.best-practices {
    background: #e2e3ff;
    color: #383874;
}

.date,
.read-time {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.tutorial-title {
    margin-bottom: 0.75rem;
}

.tutorial-title a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.tutorial-title a:hover {
    color: var(--primary-color);
}

.tutorial-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tutorial-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    background: var(--bg-light);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    border: 1px solid var(--border-color);
}

/* 加载更多按钮 */
.load-more-section {
    text-align: center;
    margin-top: 3rem;
}

.load-more-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.load-more-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

/* 订阅新闻通讯样式 */
.newsletter-section {
    background: var(--primary-gradient);
    padding: 4rem 0;
}

.newsletter-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.newsletter-text {
    flex: 1;
}

.newsletter-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
}

.newsletter-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

.newsletter-form {
    display: flex;
    gap: 1rem;
    flex: 1;
    max-width: 400px;
}

.newsletter-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
}

.newsletter-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.newsletter-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.newsletter-btn:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .blog-hero-title {
        font-size: 2.5rem;
    }
    
    .blog-hero-subtitle {
        font-size: 1.1rem;
    }
    
    .blog-stats {
        gap: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .search-box {
        max-width: none;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
    
    .featured-card {
        flex-direction: column;
    }
    
    .featured-image {
        width: 100%;
        height: 200px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .newsletter-content {
        flex-direction: column;
        text-align: center;
    }
    
    .newsletter-form {
        max-width: none;
        width: 100%;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .blog-hero {
        padding: 100px 0 60px;
    }
    
    .blog-hero-title {
        font-size: 2rem;
    }
    
    .blog-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .category-filters {
        justify-content: center;
    }
    
    .tutorial-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tutorial-card,
.featured-card,
.category-card {
    animation: fadeInUp 0.6s ease forwards;
}

.tutorial-card:nth-child(1) { animation-delay: 0.1s; }
.tutorial-card:nth-child(2) { animation-delay: 0.2s; }
.tutorial-card:nth-child(3) { animation-delay: 0.3s; }
.tutorial-card:nth-child(4) { animation-delay: 0.4s; }
.tutorial-card:nth-child(5) { animation-delay: 0.5s; }
.tutorial-card:nth-child(6) { animation-delay: 0.6s; }

/* 代码高亮样式覆盖 */
.tutorial-content pre {
    background: #2d3748;
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
}

.tutorial-content code {
    background: #f7fafc;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    color: #e53e3e;
}

.tutorial-content pre code {
    background: transparent;
    padding: 0;
    color: #e2e8f0;
}

/* 搜索高亮样式 */
.search-highlight {
    background: yellow;
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
}

/* 过滤动画 */
.tutorial-card.filtered-out {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
    pointer-events: none;
}

.tutorial-card.filtered-in {
    opacity: 1;
    transform: scale(1);
    transition: all 0.3s ease;
}