/* 管理后台样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    background: #f5f6fa;
    color: #333;
    line-height: 1.6;
}

/* 管理容器 */
.admin-container {
    min-height: 100vh;
}

/* 管理头部 */
.admin-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.admin-header h1 {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.5em;
}

.admin-nav a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    padding: 8px 15px;
    border-radius: 5px;
    transition: background 0.3s;
}

.admin-nav a:hover {
    background: rgba(255,255,255,0.2);
}

/* 主要内容区域 */
.admin-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border: 1px solid #e0e6ed;
}

.card h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.3em;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    margin-right: 10px;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-edit {
    background: #ffc107;
    color: #212529;
    padding: 5px 10px;
    font-size: 12px;
}

.btn-edit:hover {
    background: #e0a800;
}

.btn-delete {
    background: #dc3545;
    color: white;
    padding: 5px 10px;
    font-size: 12px;
}

.btn-delete:hover {
    background: #c82333;
}

/* 表格样式 */
.tools-table {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th, td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid #ddd;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
}

tr:hover {
    background: #f8f9fa;
}

.url-link {
    color: #667eea;
    text-decoration: none;
}

.url-link:hover {
    text-decoration: underline;
}

.actions {
    white-space: nowrap;
}

/* 提示信息 */
.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

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

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

/* 登录页面样式 */
.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: #333;
    margin-bottom: 10px;
}

.login-header p {
    color: #666;
    font-size: 14px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    color: #555;
    font-weight: 500;
}

.btn-login {
    width: 100%;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 12px;
    font-size: 16px;
    font-weight: 500;
}

.btn-login:hover {
    background: linear-gradient(45deg, #764ba2, #667eea);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
}

.login-footer a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

.login-footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .admin-header h1 {
        flex-direction: column;
        gap: 15px;
    }
    
    .admin-content {
        padding: 20px 15px;
    }
    
    .card {
        padding: 20px;
    }
    
    .tools-table {
        font-size: 14px;
    }
    
    th, td {
        padding: 8px;
    }
}