* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}

body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container, .admin-container {
    background-color: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    width: 400px;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #666;
}

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

input:focus {
    outline: none;
    border-color: #409eff;
}

.login-btn, .save-btn {
    width: 100%;
    padding: 12px;
    background-color: #409eff;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.login-btn:hover, .save-btn:hover {
    background-color: #337ecc;
}

.error-message {
    color: #f56c6c;
    text-align: center;
    margin: 10px 0;
    height: 20px;
}

.admin-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: #409eff;
    text-decoration: none;
}

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

.success-message {
    color: #67c23a;
    text-align: center;
    margin: 10px 0;
    height: 20px;
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: #666;
    text-decoration: none;
}

.back-link:hover {
    color: #409eff;
}