/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: 
        linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px),
        linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
        linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    background-size: 50px 50px, 50px 50px, 100% 100%;
    background-attachment: fixed;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden; /* 防止水平滚动 */
}

a {
    text-decoration: none;
    color: inherit;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1001;
    width: 44px;
    height: 44px;
    background: #fff;
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    background: #f8f9fa;
    transform: scale(1.05);
}

.mobile-menu-toggle .hamburger {
    width: 20px;
    height: 2px;
    background: #333;
    position: relative;
    transition: all 0.3s ease;
}

.mobile-menu-toggle .hamburger::before,
.mobile-menu-toggle .hamburger::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: #333;
    transition: all 0.3s ease;
}

.mobile-menu-toggle .hamburger::before {
    top: -6px;
}

.mobile-menu-toggle .hamburger::after {
    bottom: -6px;
}

.mobile-menu-toggle.active .hamburger {
    background: transparent;
}

.mobile-menu-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.mobile-menu-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* 容器布局 */
.container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    transition: all 0.3s ease;
    min-height: 100vh;
    align-items: flex-start;
}

/* 侧边栏样式 */
.sidebar {
    position: sticky;
    top: 20px;
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    overflow-y: auto;
    /* height/max-height 移除 */
}

/* 首页侧边栏特殊处理 */
body.home-page .sidebar {
    overflow-y: visible !important;
    height: auto !important;
    max-height: none !important;
}

/* 用户信息 */
.user-profile {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-bottom: 15px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05);
}

.user-info {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    color: #666;
    font-size: 14px;
}

.user-info .count {
    color: #333;
    font-weight: 500;
}

/* 导航菜单 */
.main-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px;
    border-radius: 8px;
    color: #666;
    transition: all 0.3s ease;
    cursor: pointer;
    user-select: none;
}

.nav-item:hover {
    background: #f5f5f5;
    color: #333;
    transform: translateX(5px);
}

.nav-item .icon {
    margin-right: 10px;
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-item .count {
    margin-left: auto;
    font-size: 12px;
    color: #999;
    background: #f0f0f0;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* 工具按钮组 */
.tool-group {
    display: flex;
    justify-content: center;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.tool-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #f5f5f5;
    color: #666;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

.tool-btn:hover {
    background: #e0e0e0;
    color: #333;
    transform: scale(1.1);
}

/* 标签云 */
.tags-section {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.tag-item {
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: #fff;
    transition: all 0.3s ease;
    cursor: pointer;
    user-select: none;
}

.tag-item:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

/* 归档列表 */
.archive-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.archive-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    border-radius: 6px;
    color: #666;
    font-size: 13px;
    transition: all 0.3s ease;
    cursor: pointer;
    user-select: none;
}

.archive-item:hover {
    background: #f5f5f5;
    color: #333;
    transform: translateX(5px);
}

.archive-item .count {
    background: #f0f0f0;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    min-width: 20px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 40px;
    flex: 1 1 auto;
}

/* Banner图片 */
.banner-container {
    width: 100%;
    margin-bottom: 24px;
}

.banner-image {
    width: 100%;
    height: 300px;
    max-height: 400px;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    object-fit: cover;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.banner-image:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* 过滤状态显示 */
.filter-status {
    grid-column: 1 / -1;
    background: #fff;
    border-radius: 10px;
    padding: 15px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-left: 4px solid #4ECDC4;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.filter-info {
    font-size: 14px;
    color: #666;
    background: #f8f9fa;
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.clear-filter {
    margin-left: auto;
    padding: 6px 12px;
    background: #ff6b6b;
    color: white;
    border-radius: 20px;
    font-size: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.clear-filter:hover {
    background: #ff5252;
    transform: translateY(-1px);
}

/* 标签视图 */
.tags-view {
    grid-column: 1 / -1;
}

.tags-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.section-title {
    font-size: 24px;
    font-weight: 600;
    color: #333;
}

.back-to-home {
    padding: 8px 16px;
    background: #4ECDC4;
    color: white;
    border-radius: 20px;
    font-size: 14px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.back-to-home:hover {
    background: #45b7aa;
    transform: translateY(-1px);
}

.tags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.tag-card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tag-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4ECDC4, #44A08D);
}

.tag-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.tag-name {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.tag-count {
    font-size: 14px;
    color: #666;
    background: #f8f9fa;
    padding: 4px 12px;
    border-radius: 15px;
    display: inline-block;
}

/* 文章卡片 */
.post-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.post-cover {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

.post-cover a {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.post-card:nth-child(3n+1) .post-cover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.post-card:nth-child(3n+2) .post-cover {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.post-card:nth-child(3n+3) .post-cover {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.post-card:nth-child(4n+1) .post-cover {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.post-card:nth-child(4n+2) .post-cover {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.post-card:nth-child(4n+3) .post-cover {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.post-card:nth-child(4n+4) .post-cover {
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

.post-cover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.post-card:hover .post-cover img {
    transform: scale(1.1);
}

.post-cover:not(:has(img)) {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
    font-weight: 300;
}

.post-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* 当有封面图片时，内容覆盖在图片上 */
.post-cover:has(img) .post-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    color: #fff;
    z-index: 2;
}

.post-meta {
    display: flex;
    gap: 15px;
    align-items: center;
    font-size: 12px;
    color: #666;
}

/* 当有封面图片时，元信息显示为白色 */
.post-cover:has(img) .post-meta {
    color: #fff;
}

.post-title {
    font-size: 28px;
    font-weight: bold;
    color: #333;
    line-height: 1;
    margin: 0;
    margin-top: -8px;
    padding-top: 0;
    padding-bottom: 0;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

/* 有封面时标题为白色且阴影更明显 */
.post-cover:has(img) .post-content .post-title {
    color: #fff;
    text-shadow: 0 4px 16px rgba(0,0,0,0.45);
}

.post-title a {
    color: inherit;
    transition: color 0.3s ease;
}

.post-title a:hover {
    color: #4ECDC4;
    text-shadow: 0 4px 16px rgba(0,0,0,0.55);
}

.post-cover:has(img) .post-content .post-title a {
    color: #fff;
}

.post-cover:has(img) .post-content .post-title a:hover {
    color: #4ECDC4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.post-meta {
    display: flex;
    gap: 15px;
    align-items: center;
    font-size: 12px;
    color: #666;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tag {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    color: #fff;
    background: #4ECDC4;
}

.post-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #666;
}

.post-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.post-info .icon {
    font-size: 14px;
}

.post-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.page-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: #fff;
    color: #666;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-num:hover {
    background: #4ECDC4;
    color: white;
    transform: translateY(-2px);
}

.page-num.active {
    background: #4ECDC4;
    color: white;
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.3);
}

/* 响应式设计 - 大屏幕 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 15px;
        gap: 15px;
    }
    
    .sidebar {
        width: 240px;
    }
    
    .tags-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        height: 100vh;
        width: 280px;
        z-index: 1000;
        transition: left 0.3s ease;
        border-radius: 0;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .banner-image {
        height: 250px;
    }
    
    .tags-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 15px;
    }
    
    .tag-card {
        padding: 15px;
    }
    
    .tag-name {
        font-size: 16px;
    }
}

/* 响应式设计 - 手机横屏 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
        gap: 10px;
    }
    
    .main-content {
        gap: 15px;
    }
    
    .banner-container {
        margin-bottom: 15px;
    }
    
    .banner-image {
        height: 200px;
        border-radius: 10px;
    }
    
    .filter-status {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 15px;
    }
    
    .clear-filter {
        margin-left: 0;
        align-self: flex-end;
    }
    
    .tags-view {
        margin-top: 15px;
    }
    
    .tags-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 20px;
    }
    
    .section-title {
        font-size: 20px;
    }
    
    .back-to-home {
        align-self: flex-start;
    }
    
    .tags-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 10px;
    }
    
    .tag-card {
        padding: 12px;
    }
    
    .tag-name {
        font-size: 14px;
    }
    
    .tag-count {
        font-size: 12px;
    }
    
    .post-card {
        border-radius: 10px;
    }
    
    .post-cover {
        height: 180px;
    }
    
    .post-content {
        padding: 15px;
        gap: 10px;
    }
    
    .post-title {
        font-size: 16px;
    }
    
    .post-excerpt {
        font-size: 13px;
        -webkit-line-clamp: 2;
    }
    
    .post-bottom {
        padding-top: 10px;
    }
    
    .pagination {
        gap: 8px;
        margin-top: 30px;
    }
    
    .page-num {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
}

/* 响应式设计 - 手机竖屏 */
@media (max-width: 480px) {
    .container {
        padding: 8px;
    }
    
    .banner-container {
        margin-bottom: 10px;
    }
    
    .banner-image {
        height: 150px;
        border-radius: 8px;
    }
    
    .filter-status {
        padding: 12px;
        border-radius: 8px;
    }
    
    .filter-info {
        font-size: 13px;
        padding: 4px 8px;
    }
    
    .clear-filter {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .tags-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 8px;
    }
    
    .tag-card {
        padding: 10px;
        border-radius: 8px;
    }
    
    .tag-name {
        font-size: 13px;
        margin-bottom: 8px;
    }
    
    .tag-count {
        font-size: 11px;
        padding: 2px 8px;
    }
    
    .post-card {
        border-radius: 8px;
    }
    
    .post-cover {
        height: 160px;
    }
    
    .post-content {
        padding: 12px;
        gap: 8px;
    }
    
    .post-title {
        font-size: 15px;
        line-height: 1.3;
    }
    
    .post-meta {
        font-size: 11px;
        gap: 10px;
    }
    
    .post-tags {
        gap: 3px;
    }
    
    .tag {
        font-size: 10px;
        padding: 1px 6px;
    }
    
    .post-excerpt {
        font-size: 12px;
        line-height: 1.5;
    }
    
    .post-bottom {
        padding-top: 8px;
    }
    
    .post-info {
        font-size: 11px;
    }
    
    .pagination {
        gap: 6px;
        margin-top: 25px;
    }
    
    .page-num {
        width: 32px;
        height: 32px;
        font-size: 13px;
        border-radius: 6px;
    }
    
    .mobile-menu-toggle {
        top: 15px;
        left: 15px;
        width: 40px;
        height: 40px;
    }
    
    .mobile-menu-toggle .hamburger,
    .mobile-menu-toggle .hamburger::before,
    .mobile-menu-toggle .hamburger::after {
        width: 18px;
    }
}

/* 响应式设计 - 超小屏幕 */
@media (max-width: 360px) {
    .container {
        padding: 5px;
    }
    
    .banner-image {
        height: 120px;
    }
    
    .tags-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 6px;
    }
    
    .tag-card {
        padding: 8px;
    }
    
    .tag-name {
        font-size: 12px;
    }
    
    .tag-count {
        font-size: 10px;
    }
    
    .post-cover {
        height: 140px;
    }
    
    .post-content {
        padding: 10px;
    }
    
    .post-title {
        font-size: 14px;
    }
    
    .post-excerpt {
        font-size: 11px;
    }
    
    .pagination {
        gap: 4px;
    }
    
    .page-num {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-item:hover,
    .tool-btn:hover,
    .tag-item:hover,
    .archive-item:hover,
    .post-card:hover,
    .tag-card:hover,
    .page-num:hover {
        transform: none;
    }
    
    .nav-item:active,
    .tool-btn:active,
    .tag-item:active,
    .archive-item:active,
    .post-card:active,
    .tag-card:active,
    .page-num:active {
        transform: scale(0.95);
    }
    
    .post-card:hover .post-cover img {
        transform: none;
    }
    
    .banner-image:hover {
        transform: none;
    }
    
    .clear-filter:hover {
        transform: none;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .avatar,
    .banner-image,
    .post-cover img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* 打印样式 */
@media print {
    .sidebar,
    .mobile-menu-toggle,
    .filter-status,
    .pagination {
        display: none !important;
    }
    
    .container {
        grid-template-columns: 1fr;
        max-width: none;
        padding: 0;
    }
    
    .main-content {
        gap: 20px;
    }
    
    .post-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .banner-image {
        height: 200px;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background: 
            linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px),
            linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
            linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
        color: #e0e0e0;
    }
    
    .sidebar,
    .post-card,
    .tag-card,
    .filter-status {
        background: #2d2d2d;
        color: #e0e0e0;
    }
    
    .post-title,
    .tag-name,
    .section-title {
        color: #ffffff;
    }
    
    .post-excerpt,
    .post-meta,
    .user-info,
    .nav-item {
        color: #b0b0b0;
    }
    
    .nav-item:hover,
    .archive-item:hover {
        background: #3d3d3d;
        color: #ffffff;
    }
    
    .tool-btn {
        background: #3d3d3d;
        color: #b0b0b0;
    }
    
    .tool-btn:hover {
        background: #4d4d4d;
        color: #ffffff;
    }
    
    .mobile-menu-toggle {
        background: #2d2d2d;
    }
    
    .mobile-menu-toggle .hamburger,
    .mobile-menu-toggle .hamburger::before,
    .mobile-menu-toggle .hamburger::after {
        background: #e0e0e0;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
} 

.post-cover .post-content {
    justify-content: flex-start !important;
    padding-top: 100px !important;
    padding-bottom: 6px !important;
}