.header-logo{height: 60px;width: 100%;padding-bottom: 5px;}
.navbar-siss{float: right;}
.navbar-siss img{height: 50px;}
.container{clear: both;}
.navbar .container{display: block;}
.navbar-nav{width: 100%;justify-content: space-between;display: flex;}
.navbar-nav .nav-item{text-align: center;}
.navbar-brand img {
            height: 50px; /* 调整logo高度 */
            max-width: 100%;
            margin-left: 10px;
        }
        .navbar {
            padding: 15px 0;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .navbar-toggler{position: absolute;right: 10px;top: 25px;}
        .nav-link {
            font-weight: 500;
            margin: 0 5px;
            color: #333;
            position: relative;
            padding-bottom: 15px;
        }
        .nav-link:hover {
            color: #127d53;
        }
        /* 选中的导航项下划线效果 */
        .nav-link.active {
            font-weight: bolder;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);
            border-radius: 3px;
        }
        section {
            min-height: 80vh;
        }
        h2{
            padding-top: 50px;
            min-height: 120px;
            padding-bottom: 20px;
            font-weight: bolder;
            width: 90%;
            font-size: 45px;
            margin-left: 5%;
            position: relative;
        }
        h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);
            border-radius: 3px;
        }
        .demographics{text-align: center;}
        .demographics p{padding: 0;margin: 0;margin-top: 5px;}
        .form-body{margin-left: 10%;width: 80%;margin-top: 30px;}
        .form-body button{background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);border:none;width: 100%;border-radius: 50px;height: 50px;;margin: 0 auto;}
        .form-body .col-form-label{font-weight: bolder;}
        .form-body .col-form-label span{color: #FF0000;margin-left: 2px;display: inline-block;}
        .form-body .col-form-radio{padding-top: 20px;}
        .form-body .buttons{margin-top: 50px;}
        .upload-photo{width: 200px;height: 200px;background-image: url(../img/photo.jpg);background-size: 100%;border: 1px solid #e7e7e7;text-align: center;}
        .upload-photo-file{opacity: 0;width: 1px;height: 1px;}
        .upload-photo img{margin: 0 auto;max-height: 100%;}
        .page-img img{width: 100%;}
        .page-content{width: 80%;margin-left: 10%;margin-top: 50px;word-wrap: break-word;}
        .page-content h3{font-size: 30px;font-weight: bolder;}
        .page-content p{margin-top: 30px;}
        .page-img .page-agenda{width: 80%;margin-left: 10%;margin-top: 50px;font-weight: 500;}
        .page-img .page-venue{width: 80%;margin-left: 10%;margin-top: 40px;}
        .page-img .page-venue .row{margin-top: 30px;}
        .page-img .buttons{width: 90%;display: flex;justify-content: center;margin: 0 auto;margin-top: 40px;}
        .page-img .buttons .btn{border:none;width: 130px;border-radius: 45px;height: 45px;margin: 0px 20px;font-size: 20px;background-color: #c9c9c9;padding: 0px;line-height: 45px;font-weight: bolder;display: block;}
        .page-img .buttons .btn.active{background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);color: #FFF;}
        .register-page textarea{height: 150px;}
        .register-page h3{color: #40abcf;font-size: 20px;}
        .travel-info{width: 80%;margin-left: 10%;margin-top: 50px;word-wrap: break-word;}
        .travel-info h3{text-align: left;color: #40abcf;padding-bottom: 20px;line-height: 40px;font-size: 30px;font-weight: bolder;}
        .travel-info p{text-indent:2em;}
        .footer{text-align: center;}
        .footer img{width: 100%;}
        .copyright{background-color: #222222;width: 100%;height: 100px;text-align: center;color: #FFF;line-height: 100px;font-size: 15px;}

        .about-content{width: 80%;margin-left: 10%;margin-top: 50px;word-wrap: break-word;}
        .about-content h3{text-align: left;color: #40abcf;padding-bottom: 20px;line-height: 40px;padding-left: 20px;font-size: 30px;font-weight: bolder;}
        .about-content h3 span{font-weight:lighter;margin-top: 10px;display: inline-block;}
        .about-content p{padding: 5px 20px;padding-top: 5px;margin: 0px;}
        .about-content .t{
                background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);
                color: white;
                padding: 10px 20px;
                font-size: 18px;
                font-weight: bold;
                margin-top: 30px;margin-bottom: 30px;
            }
        .about-content b{color: #40abcb;}
        .about-content .introduction{width: 100%;padding-bottom: 50px;}
        .about-content .introduction img{width: 100%;}
        .about-content .introduction{text-align: center;color: #40acc9;font-weight: bolder;font-size: 22px;}

        .page-content .sponsorship{text-align: center;font-weight: bolder;font-size: 25px;margin-top: 100px;}
        .page-content .sponsorship .col-12{padding: 20px;}

        @media (min-width: 992px) {
            .demographics{padding: 20px 0px;}
            .form-body button{width: 40%;}
            .form-body .col-form-label{text-align: right;}
            .mb-3.row{margin-top: 30px;}
            .copyright{font-size: 20px;}
            section {padding-bottom: 0px;}
            .page-content.speakers-content img{width: auto;}
        }
        @media (max-width: 500px) {
            .navbar-collapse{padding-left: 10px;padding-right: 10px;}
            .container{padding-left: 0%;padding-right: 0%;}
            .copyright{font-size: 12px;}
            .page-img .page-agenda{width: 100%;margin-left: 0%;}
            .page-img .buttons .btn{margin: 0px 10px;}
            .about-content .introduction img{width: 60%;}
            .page-content .sponsorship{margin-top: 50px;}
            .navbar-siss{position: absolute;right: 70px}
        }

        .agenda-header {
                background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);
                color: white;
                padding: 8px;
                text-align: center;
                font-size: 18px;
                font-weight: bold;
        }

            .session-title {
                background: linear-gradient(90deg, #ebf4f9 0%, #eaf3f0 100%);
                color: #43accc;
                padding: 8px 15px;
                font-weight: bold;
                font-size: 1rem;
                padding-left: 40px;
            }

            .agenda-item {
                padding: 10px 0px;
                word-wrap: break-word;
            }

            .agenda-time {
                min-width: 150px;
                padding-left: 40px;
            }

            /* .agenda-item:nth-child(even) {
                background-color: #f8f9fa;
            } */

           
            .agenda-bottom {
                width: 100%;
                height: 3px;
                background: linear-gradient(90deg, #118ab5 0%, #127d53 100%);
                border-radius: 3px;
            }