/* 壁纸网站自定义样式 */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* 导航栏样式 */
.navbar {
    backdrop-filter: blur(10px);
    background-color: rgba(17, 24, 39, 0.95) !important;
    box-shadow: var(--shadow);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

/* 主要内容区域 */
.main-content {
    min-height: calc(100vh - 200px);
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 100px 0;
    margin: -1.5rem -1.5rem 3rem -1.5rem;
    border-radius: 0 0 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-section::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="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
    transition: all 0.3s ease;
}

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

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 壁纸网格 */
.wallpaper-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.wallpaper-item {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    background: white;
}

.wallpaper-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.wallpaper-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: all 0.3s ease;
}

.wallpaper-item:hover .wallpaper-image {
    transform: scale(1.05);
}

.wallpaper-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
}

.wallpaper-item:hover .wallpaper-overlay {
    opacity: 1;
}

.wallpaper-info {
    color: white;
    width: 100%;
}

.wallpaper-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.wallpaper-meta {
    font-size: 0.9rem;
    opacity: 0.9;
}

.wallpaper-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: all 0.3s ease;
}

.wallpaper-item:hover .wallpaper-actions {
    opacity: 1;
}

.btn-action {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.btn-action:hover {
    background: white;
    transform: scale(1.1);
}

/* 按钮样式 */
.btn {
    border-radius: 0.75rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 表单样式 */
.form-control {
    border-radius: 0.75rem;
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

/* 分类卡片 */
.category-card {
    text-align: center;
    padding: 2rem;
    border-radius: 1rem;
    background: white;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: inherit;
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.category-count {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 统计卡片 */
.stats-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stats-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* 搜索框 */
.search-box {
    background: white;
    border-radius: 2rem;
    padding: 0.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    max-width: 500px;
    margin: 0 auto 3rem;
}

.search-input {
    border: none;
    outline: none;
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
}

.search-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.search-btn:hover {
    transform: scale(1.1);
}

/* 分页样式 */
.pagination .page-link {
    border-radius: 0.5rem;
    margin: 0 0.25rem;
    border: 2px solid var(--border-color);
    color: var(--text-dark);
    font-weight: 500;
}

.pagination .page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .wallpaper-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .hero-section {
        padding: 60px 0;
        margin: -1rem -1rem 2rem -1rem;
        border-radius: 0 0 1rem 1rem;
    }
    
    .navbar-nav {
        text-align: center;
    }
    
    .search-box {
        margin: 0 1rem 2rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .wallpaper-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-card {
        padding: 1.5rem;
    }
    
    .stats-number {
        font-size: 2rem;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 工具提示 */
.tooltip {
    font-size: 0.875rem;
}

/* 模态框样式 */
.modal-content {
    border-radius: 1rem;
    border: none;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    border-radius: 1rem 1rem 0 0;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 1rem 1rem;
}

/* 警告框样式 */
.alert {
    border-radius: 0.75rem;
    border: none;
    box-shadow: var(--shadow);
}

/* 进度条样式 */
.progress {
    border-radius: 1rem;
    height: 0.75rem;
    background-color: var(--border-color);
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 1rem;
}

/* 标签样式 */
.badge {
    border-radius: 0.5rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
}

.badge-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

/* 表格样式 */
.table {
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table th {
    background-color: var(--bg-light);
    border: none;
    font-weight: 600;
    color: var(--text-dark);
}

.table td {
    border-color: var(--border-color);
    vertical-align: middle;
}

/* 侧边栏样式 */
.sidebar {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    height: fit-content;
}

.sidebar-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.sidebar-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.sidebar-item:last-child {
    border-bottom: none;
}

.sidebar-item:hover {
    padding-left: 0.5rem;
}

.sidebar-link {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
}

.sidebar-link:hover {
    color: var(--primary-color);
}

/* 上传区域样式 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem;
    text-align: center;
    background: white;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-light);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(102, 126, 234, 0.1);
}

.upload-icon {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.upload-text {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 图片预览 */
.image-preview {
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 1rem;
}

.image-preview img {
    width: 100%;
    height: auto;
    display: block;
}

/* 用户头像 */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.user-avatar-lg {
    width: 80px;
    height: 80px;
}

/* 社交链接 */
.social-links a {
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color) !important;
    transform: translateY(-2px);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}