/* 菜单栏样式 */
        #menu {
            width: 100%;
            background-color: #fff;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            padding: 10px 0;
            margin-bottom: 30px;
        }

        .menu {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .menu>div {
            width: 140px;
            height: 50px;
            position: relative;
        }

        .menu-btn {
            display: inline-block;
            width: 100%;
            height: 100%;
            text-align: center;
            line-height: 50px;
            color: #fff;
            font-weight: bold;
            font-size: 14px;
            border-radius: 4px;
            transition: all 0.3s ease;
            border: 1px solid #2c5aa0;
            background: linear-gradient(180deg, #4a89dc 0%, #2c5aa0 100%);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
        }

        .menu-btn:hover {
            background: linear-gradient(180deg, #5b98e6 0%, #3d6fb9 100%);
            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.3);
            transform: translateY(-1px);
        }

        .menu-btn:active {
            background: linear-gradient(180deg, #2c5aa0 0%, #4a89dc 100%);
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15),
                inset 0 1px 3px rgba(0, 0, 0, 0.2);
            transform: translateY(0);
        }

        /*footer style start*/
        #footer {
            width: 95%;
            margin: 40px auto;
        }

        .footer {
            margin: 0 auto;
            width: 900px;
        }

        .footer>div:nth-child(2) {
            margin: 50px auto;
            width: 520px;
            height: 210px;
        }

        .footer>div:nth-child(2)>img {
            margin: 0 10px;
        }

        .footer>div:nth-child(3) {
            width: 500px;
            padding: 20px;
        }

        h2 {
            color: red;
        }

        .footer>div:last-child {
            text-align: center;
        }

        /*footer style end*/