* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', sans-serif;
    background: #f5f5f5;
}

/* 登录页面 */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.login-container h1 {
    text-align: center;
    color: #1976d2;
    margin-bottom: 30px;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background: #1976d2;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.login-container button:hover {
    background: #1565c0;
}

.error {
    color: #f44336;
    margin-top: 10px;
    text-align: center;
}

/* 导航栏 */
.navbar {
    background: #1976d2;
    color: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    font-size: 20px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-right button {
    padding: 8px 16px;
    background: rgba(255,255,255,0.2);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.nav-right button:hover {
    background: rgba(255,255,255,0.3);
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 20px auto;
    padding: 20px;
}

/* 标签页 */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab {
    padding: 12px 24px;
    background: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.tab:hover {
    background: #e3f2fd;
}

.tab.active {
    background: #1976d2;
    color: white;
}

/* 标签内容 */
.tab-content {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tab-content h2 {
    color: #333;
    margin-bottom: 20px;
}

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

table th {
    background: #f5f5f5;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #666;
    border-bottom: 2px solid #ddd;
}

table td {
    padding: 12px;
    border-bottom: 1px solid #eee;
}

table tr:hover {
    background: #f9f9f9;
}

.status-online {
    color: #4caf50;
    font-weight: 600;
}

.status-offline {
    color: #f44336;
    font-weight: 600;
}

/* 表单 */
h3 {
    color: #1976d2;
    margin: 25px 0 15px 0;
    padding-top: 15px;
    border-top: 1px solid #eee;
    font-size: 16px;
}

h3:first-of-type {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

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

.form-group small {
    display: block;
    color: #999;
    font-size: 12px;
    margin-top: 5px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #666;
    font-weight: 500;
}

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

.form-group input[type="checkbox"] {
    margin-right: 8px;
}

button[type="submit"] {
    padding: 12px 24px;
    background: #1976d2;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
}

button[type="submit"]:hover {
    background: #1565c0;
}

.btn-delete {
    padding: 6px 12px;
    background: #f44336;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.btn-delete:hover {
    background: #d32f2f;
}

/* 密码管理样式 */
.form-section {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
    border: 1px solid #e0e0e0;
}

.form-section h3 {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    color: #1976d2;
    margin-bottom: 20px;
}

.form-section select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background: white;
}

.password-field {
    font-family: 'Courier New', monospace;
    background: #f5f5f5;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 13px;
}

.btn-edit {
    padding: 6px 12px;
    background: #2196f3;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.btn-edit:hover {
    background: #1976d2;
}

.btn-primary {
    padding: 12px 24px;
    background: #1976d2;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 500;
}

.btn-primary:hover {
    background: #1565c0;
}