/* 主要样式表 */
body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
header {
    background-color: #343a40;
    color: #fff;
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
}

.user-info {
    display: flex;
    align-items: center;
}

.user-info span {
    margin-right: 15px;
}

/* 导航菜单 */
nav {
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

nav ul li {
    margin: 0;
    padding: 0;
}

nav ul li a {
    display: block;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    transition: all 0.3s;
}

nav ul li a:hover, nav ul li a.active {
    background-color: #f5f5f5;
    color: #007bff;
}

/* 主要内容区域 */
main {
    padding: 30px 0;
}

.card {
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background-color: #f8f9fa;
    padding: 15px 20px;
    border-bottom: 1px solid #e9ecef;
    font-weight: bold;
}

.card-body {
    padding: 20px;
}

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

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #0069d9;
}

.btn-danger {
    background-color: #dc3545;
    color: #fff;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-success {
    background-color: #28a745;
    color: #fff;
}

.btn-success:hover {
    background-color: #218838;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 12px 15px;
    border-bottom: 1px solid #e9ecef;
    text-align: left;
}

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

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

/* 服务器状态指示器 */
.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 5px;
}

.status-online {
    background-color: #28a745;
}

.status-offline {
    background-color: #dc3545;
}

.status-unknown {
    background-color: #ffc107;
}

/* 消息提示 */
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

/* 登录和注册页面 */
.auth-container {
    max-width: 500px;
    margin: 100px auto;
}

/* 页脚样式 */
footer {
    background-color: #343a40;
    color: #fff;
    padding: 20px 0;
    text-align: center;
    margin-top: 50px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }
    
    .user-info {
        margin-top: 15px;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav ul li a {
        padding: 10px;
        border-bottom: 1px solid #e9ecef;
    }
}