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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.admin-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 头部样式 */
.admin-header {
    background-color: #4a89dc;
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header .logo h1 {
    margin: 0;
    font-size: 1.5rem;
}

.admin-header .user-info {
    font-size: 0.9rem;
}

.admin-header .user-info a {
    color: white;
    text-decoration: none;
}

.admin-header .user-info a:hover {
    text-decoration: underline;
}

/* 导航样式 */
.admin-nav {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.admin-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.admin-nav li {
    margin: 0;
}

.admin-nav a {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s;
}

.admin-nav a:hover, .admin-nav a.active {
    background-color: #eaeaea;
}

.admin-nav a.active {
    color: #4a89dc;
    font-weight: 600;
}

/* 内容区域样式 */
.admin-content {
    flex: 1;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.message-container {
    margin-bottom: 20px;
}

.alert {
    padding: 10px 15px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    border: none;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.btn-default {
    background-color: #e4e6eb;
    color: #333;
}

.btn-default:hover {
    background-color: #d0d3d9;
}

.btn-primary {
    background-color: #4a89dc;
    color: white;
}

.btn-primary:hover {
    background-color: #3b71c6;
}

.btn-success {
    background-color: #37c682;
    color: white;
}

.btn-success:hover {
    background-color: #2fb572;
}

.btn-info {
    background-color: #5bc0de;
    color: white;
}

.btn-info:hover {
    background-color: #46b8da;
}

.btn-danger {
    background-color: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background-color: #d62c1a;
}

.btn-sm {
    padding: 4px 8px;
    font-size: 12px;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    background-color: #fff;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.table th, .table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover {
    background-color: #f5f5f5;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #4a89dc;
}

.form-help {
    font-size: 12px;
    color: #666;
    margin-top: 5px;
}

.form-buttons {
    margin-top: 30px;
    display: flex;
    gap: 10px;
}

/* 页脚样式 */
.admin-footer {
    background-color: #fff;
    padding: 15px 20px;
    text-align: center;
    border-top: 1px solid #eee;
    color: #777;
    font-size: 0.9rem;
}

/* 控制面板样式 */
.dashboard h2 {
    margin-bottom: 25px;
    color: #333;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
}

.stat-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(74, 137, 220, 0.1);
    color: #4a89dc;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    margin-right: 15px;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 14px;
    color: #777;
    margin: 0 0 5px;
}

.stat-info p {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
    color: #333;
}

.dashboard-actions, .dashboard-recent {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.dashboard-actions h3, .dashboard-recent h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #333;
    font-size: 18px;
}

.action-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* 链接管理页面样式 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.links-form {
    background-color: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

.links-form h2 {
    margin-top: 0;
    margin-bottom: 25px;
    color: #333;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .admin-header {
        flex-direction: column;
        text-align: center;
    }
    
    .admin-header .user-info {
        margin-top: 10px;
    }
    
    .admin-nav ul {
        flex-direction: column;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
}

/* 设置页面样式 */
.settings {
    background-color: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.settings h2 {
    margin-top: 0;
    margin-bottom: 25px;
    color: #333;
}

.settings-form {
    margin-bottom: 40px;
}

.settings-preview h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 18px;
    color: #333;
}

.preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.preview-image {
    width: 100%;
    max-width: 500px;
    height: 300px;
    border: 1px solid #ddd;
    border-radius: 5px;
    overflow: hidden;
}

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

.refresh-preview {
    width: 150px;
}