/* 博客页面专用样式 */

/* 页面头部 */
.posts-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.posts-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    animation: gridFloat 20s ease-in-out infinite;
}

@keyframes gridFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-10px) scale(1.02); }
}

.page-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    opacity: 0;
    animation: slideInUp 1s ease-out 0.3s forwards;
}

.page-subtitle {
    font-size: 1.2rem;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    position: relative;
    z-index: 1;
    opacity: 0;
    animation: slideInUp 1s ease-out 0.6s forwards;
}

@keyframes slideInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 文章过滤区域 */
.posts-filter {
    margin-bottom: 50px;
    text-align: center;
}

.posts-filter h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 20px;
}

.filter-tags {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.filter-tag {
    padding: 10px 20px;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 25px;
    color: #6b7280;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.filter-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s;
}

.filter-tag:hover::before {
    left: 100%;
}

.filter-tag:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
}

.filter-tag.active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

/* 文章网格 */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.post-card {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 16px;
    padding: 30px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: fadeInUp 1s ease-out forwards;
}

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

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.post-card:hover::before {
    transform: scaleX(1);
}

.post-card:hover {
    border-color: #d1d5db;
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* 文章元信息 */
.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 0.8rem;
}

.post-date {
    color: #9ca3af;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.post-category {
    background: #f3f4f6;
    color: #6b7280;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 500;
}

/* 文章标题 */
.post-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 15px;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.post-card:hover .post-title {
    color: #3b82f6;
}

/* 文章摘要 */
.post-excerpt {
    font-size: 1rem;
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 文章标签 */
.post-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tag {
    background: #f3f4f6;
    color: #6b7280;
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tag:hover {
    background: #e5e7eb;
    color: #4b5563;
    transform: translateY(-1px);
}

/* 阅读更多链接 */
.read-more {
    color: #3b82f6;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    color: #2563eb;
    transform: translateX(5px);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-top: 2px solid #f3f4f6;
}

.page-info {
    color: #6b7280;
    font-size: 0.9rem;
}

.page-numbers {
    display: flex;
    gap: 10px;
}

.page-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    color: #6b7280;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.page-number:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-2px);
}

.page-number.active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: #ffffff;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2.5rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .post-card {
        padding: 25px;
    }
    
    .filter-tags {
        gap: 10px;
    }
    
    .filter-tag {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
    
    .pagination {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 2rem;
    }
    
    .post-card {
        padding: 20px;
    }
    
    .post-title {
        font-size: 1.2rem;
    }
    
    .post-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* 悬停效果增强 */
.post-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(59, 130, 246, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.post-card:hover::after {
    opacity: 1;
}

/* 微妙的3D效果 */
.posts-grid {
    perspective: 1000px;
}

.post-card {
    transform-style: preserve-3d;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.post-card:hover {
    transform: translateY(-8px) scale(1.02) rotateX(2deg) rotateY(1deg);
}

/* 加载动画 */
.post-card.loading {
    animation: cardLoading 1.5s ease-in-out infinite;
}

@keyframes cardLoading {
    0%, 100% { opacity: 0.7; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(-5px); }
}

/* 过滤动画 */
.post-card.filtered-out {
    animation: filterOut 0.5s ease-out forwards;
}

@keyframes filterOut {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(0.8);
        height: 0;
        margin: 0;
        padding: 0;
    }
}

.post-card.filtered-in {
    animation: filterIn 0.5s ease-out forwards;
}

@keyframes filterIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}