/* 整体页面通用样式，设置页面背景为白色和浅蓝色的渐变 */
        body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            margin: 0;
            padding: 0;
            background: linear-gradient(to bottom, #fff, #87CEEB);
			
        }

        /* 整体头部容器样式 */
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0px 20px;
            background-color: #f8f9fa;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
			position: fixed; /* 使头部固定在页面顶部 */
			top: 0; 
			left: 0; 
			width: 98%; /* 宽度为100%，覆盖整个屏幕宽度，但经过调式设置为98% */
			z-index: 1000;
        }

        #logo-container img {
            height: 40px;
            margin-right: 20px;
        }

        /* 导航栏样式 */
        nav ul {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        nav ul li {
            margin-right: 20px;
        }

        nav ul li a {
            text-decoration: none;
            color: #333;
            font-size: 16px;
            padding: 10px 15px;
            border-radius: 4px;
            transition: background-color 0.3s ease;
        }

        nav ul li a:hover {
            background-color: #e9ecef;
        }

        /* 功能按钮样式 */
        #function-buttons.button {
            text-decoration: none;
            color: #fff;
            background-color: #007bff;
            padding: 10px 15px;
            border-radius: 4px;
            margin-left: 10px;
            transition: background-color 0.3s ease;
        }

        #function-buttons.button:hover {
            background-color: #0056b3;
        }

        /* 头部下方标语、logo区域整体样式 */
       .header-banner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 50px 20px;
            color: 000;
		    max-width:800px;
		    margin:0 auto;
		 
        }
		
		/* 调整logo的样式，使其在最左边 */
		.header-banner img {
			width: 100px;
			height: auto;
			margin-bottom: 20px;
		}
		/* 让标题居中 */
		.header-banner h2 {
			font-size: 28px;
			margin: 0;
			text-align: center;
			flex-grow: 1; /* 让标题占据剩余空间 */
		}
		.header-banner p {
			font-size: 18px;
			line-height: 1.5;
			text-align: center;
			max-width: 800px;
			margin: 0 auto;
		}


      /* 登录/注册主体内容区域样式 */
      .main-content {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            max-width: 800px;
            padding: 40px;
            background-color: #fff;
            border-radius: 4px;
            box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
            display: none;
        }

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

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

       .form-group input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

       .btn {
            display: block;
            width: 100%;
            padding: 10px;
            border: none;
            border-radius: 4px;
            background-color: #007bff;
            color: #fff;
            font-size: 16px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }

       .btn:hover {
            background-color: #0056b3;
        }

       .switch-btn {
            margin-top: 10px;
            text-align: center;
            color: #007bff;
            cursor: pointer;
            text-decoration: none;
            transition: color 0.3s ease;
        }

       .switch-btn:hover {
            color: #0056b3;
        }