body {
            margin: 0;
            padding: 0;
            background-color: #2a2828; /* 灰色背景 */
            overflow: hidden; /* 取消滚动条 */
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            font-family: Arial, sans-serif;
        }
        .login-container {
            background-color: #9b9696;
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            width: 300px;
            text-align: center;
        }
        .login-container h2 {
            margin-top: 0;
            margin-bottom: 15px; /* 增加下方的间距 */
        }
        .login-container hr {
            width: 60%;
            border: none;
            height: 2px;
            background-color: #000;
            margin-top: 5px; /* 双划线与标题之间的距离 */
        }
        .login-container input[type="text"],
        .login-container input[type="password"] {
            width: 90%;
            padding: 10px;
            margin: 10px 0;
            border: 1px solid #ddd;
            border-radius: 3px;
        }
        .login-container input[type="submit"] {
            width: 40%;
            padding: 10px;
            border: none;
            border-radius: 3px;
            background-color: #333;
            color: white;
            cursor: pointer;
        }
        .login-container input[type="submit"]:hover {
            background-color: #333;
        }
        .footer {
            text-align: center;
            padding: 10px;
            position: absolute;
            bottom: 0;
            width: 100%;
            background-color: #333;
            color: white;
            font-size: 0.8em;
        }