@media only screen and (max-width: 1200px) {
    header {
        display: none;
    }
    /* header_tel 样式 */
    .header_tel {
        position: relative;
        background: #fff;
        padding: 1rem 1.5rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 60px;
        z-index: 100;
        box-sizing: border-box;
    }

    .logotel img {
        height: 40px;
    }

    /* 汉堡按钮 */
    .hamburger {
        width: 24px;
        height: 20px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        cursor: pointer;
        z-index: 200;
        box-sizing: border-box;
    }

        .hamburger span {
            display: block;
            height: 2px;
            background: #000;
            border-radius: 1px;
            transition: all 0.3s ease;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

    /* 右侧滑出菜单 */
    .side-menu {
        position: fixed;
        top: 0;
        right: -140px;
        width: 140px;
        height: 100vh;
        background: #fff;
        box-shadow: -2px 0 6px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        padding: 2rem 1.5rem;
        box-sizing: border-box;
        z-index: 150;
    }

        .side-menu.active {
            right: 0;
        }

        .side-menu ul {
            list-style: none;
        }

            .side-menu ul li {
                margin-bottom: 1.5rem;
            }

        .side-menu a {
            text-decoration: none;
            font-size: 1.1rem;
            color: #333;
            display: block;
            transition: color 0.2s ease;
        }

            .side-menu a:hover {
                color: #007BFF;
            }

    /* 遮罩层 */
    .overlay {
        position: fixed;
        inset: 0;
        background-color: rgba(0,0,0,0.5);
        display: none;
        z-index: 100;
    }

        .overlay.active {
            display: block;
        }
    #sliderBar {
        display:none;
    }
 
    
    #banner {
        display:none;
    }

    #banner_tel {
        display:block;
    }


    .bannertel {
        
       
    }

        .bannertel .swiper {
            width: 100%;
            max-width: 100%;
            height: 500px;
            position: relative; /* 确保子元素定位生效 */
            overflow: hidden;
        }

            .bannertel .swiper img {
                width: 100%;
                height: 100%;
                object-fit: cover;
            }

        .bannertel .swiper-pagination {
            position: absolute;
            bottom: 10px; /* 离底部的距离 */
            left: 0;
            width: 100%;
            text-align: center;
            z-index: 10;
        }

        .bannertel .swiper-pagination-bullet {
            background: rgba(255, 255, 255, 0.7);
            opacity: 1;
        }

        .bannertel .swiper-pagination-bullet-active {
            background: #007aff;
        }

    #advantage {
        display: none
    }


    #mobile-footer {
        display:block
    }


    .mobile-footer {
        display: none;
        position: fixed;
        bottom: 6px;
        left: 16px;
        right: 16px;
        background: #025499;
        border-radius: 22px;
        z-index: 99;
    }

        .mobile-footer li {
            float: left;
            width: 33.33333%;
        }

            .mobile-footer li a {
                position: relative;
                display: block;
                font-size: 20px;
                color: #fff;
                height: 44px;
                line-height: 44px;
                text-align: center;
            }

                .mobile-footer li a i {
                    display: block;
                    height: 44px;
                    line-height: 44px;
                }

                .mobile-footer li a::before {
                    content: "";
                    position: absolute;
                    left: 0;
                    top: 0;
                    height: 100%;
                    border-left: 1px solid rgba(255,255,255,0.2);
                }

        .mobile-footer ul li:nth-child(2) a i {
            vertical-align: 2px;
        }

    .wrapper {
        width: 100%;
        min-width: auto;  
    }

        .wrapper .container {
            width: 100%;  
            max-width: 1200px;  
            margin: 0 auto; 
          
        }

    #business {
       
        top: 0px;height:700px;
     
    }

        #business .container .panel_wrapper {
            width: 100%;
            display: flex;
            flex-wrap: wrap; /* ✅ 允许子元素自动换行 */
            height: 350px;
            margin-top: 0; /* 减少 magic number */
            padding-top: 2rem; /* 更平滑过渡 */
        }
            #business .container .panel_wrapper li {
                width: 49%;
                height: 100%;
                border-radius: 10px;
                padding: 5px 5px;
                position: relative;
                cursor: pointer;
               
          
            }

                #business .container .panel_wrapper li .content {
                    display: flex;
                    align-items: flex-start;
                    flex-wrap: wrap; /* 手机可换行 */
                
                    padding-bottom:20px
                  
                }

      #business .container .panel_wrapper li .content .icon {
                        display: -webkit-box;
                        display: -ms-flexbox;
                        display: flex;
                        -webkit-box-pack: center;
                        justify-content: center;
                        -webkit-box-align: center;
                        -ms-flex-align: center;
                        align-items: center;
                        -ms-flex-pack: center;
                        background: url('../image/panel_icon.png') no-repeat;
                        position: relative;
                        width: 89px;
                        height: 81px;
                        margin: 0 auto;
                        top: 17px;
    }
                    #business .container .panel_wrapper li .content .title {
                        font-weight: bold;
                        text-align: center; /* 可加明确的默认值 */
                        margin-bottom: 0px;
                        margin-top: 35px;
                        font-size: 16px;
                        width: 100%;
                        padding-left: 0px;
                    }
                    #business .container .panel_wrapper li .content p {
                        text-align: center;
                        
                        margin: 0px;
                        padding:0px;
                        width: 100%;
                        
                    }
        #business .container .panel_wrapper li .content p span {
                        padding: 0px;
                        margin:0px;   
                       
           }
    .solution {
        width: 100%;
        padding: 0px;
        overflow:auto;  
    }

        .solution ul  {
            
            padding: 0px
        }
    .solution ul li {
        width: 50%;
        height: 200px;
      
    }
        .solution ul li h3 {
            display:none;
        }
        .solution ul li h4 {
            font-size: 20px;
            top: 5%;
        }
        .solution ul li p {
            top: 30%;
            display: block;
            right: 3%;
        }

    #case {
        padding-top: 180px;
    }
        #case .container #case_wrapper {
            
            height: 150px;
            
        }
        #case .container #case_wrapper .case_bigTitle {
            display: none;
        }
        #case .container #case_wrapper .swiper_control {
            display: none;
        }
        #case .container #case_wrapper .swiper_wrapper .swiper_left {
            display: none;
        }

        #case .container #case_wrapper .swiper_wrapper .swiper_right {
            width: 100%;
          
        }
        #case .container #case_wrapper .swiper_wrapper .swiper-wrapper {
         
            
        }
   
    #case .container #case_wrapper .swiper_wrapper .swiper_right .swiper-container .swiper-slide {
        width: 45%;
        height: 100px; 
        margin-bottom:10px;
      
    }
    #lesson {
        background-image:none;
      
    }
    
    #lesson .container .title {
        margin-top: 0px;
        color: #000;
    }
    .n_f_big {
        font-size:15px;  font-weight:bold
    }
    .public_title {
        display:none
    }
   
}