.banner {
    position: relative;
    padding-bottom: calc(760/1920*100%);
    overflow: hidden;
}

.banner img {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
}

@keyframes slideBannerA {
    0%   {opacity: 0; transform: scale(1);}
    30%  {opacity: 1; transform: scale(1);}
    40%  {opacity: 1;}
    50%  {opacity: 1;}
    65%  {opacity: 0;transform: scale(1);}
    90%  {opacity: 0;transform: scale(1);}
    100% {opacity: 0;}
}

@keyframes slideBannerB {
    0%   {opacity: 0; transform: scale(1);}
    30%  {opacity: 1; transform: scale(1);}
    40%  {opacity: 1;}
    50%  {opacity: 1;}
    65%  {opacity: 0;transform: scale(1);}
    90%  {opacity: 0;transform: scale(1);}
    100% {opacity: 0;}
}

@keyframes slideText {
    0%   {opacity: 0;}
    30%  {opacity: 1;}
    40%  {opacity: 1;}
    50%  {opacity: 1;}
    65%  {opacity: 0;}
    90%  {opacity: 0;}
    100% {opacity: 0;}
}

#b1a {
    animation-name: slideBannerA;
    animation-duration: 16s;
    animation-iteration-count: infinite;
}

#b1b {
    animation-name: slideBannerB;
    animation-delay: 8s;
    animation-duration: 16s;
    animation-iteration-count: infinite;
}

.banner span {
    position: absolute;
    color: black;
    font-size: 12px;
    bottom: 10px;
    right: 10%;
    animation-name: slideText;
    animation-duration: 16s;
    animation-iteration-count: infinite;
}

.lattice .float_group > div {
    width: 50%;
    height: calc(49vw * 435 / 953);
    overflow: hidden;
}

.lattice .float_group > div img {
    width: 100%;
    vertical-align:middle;
}

.lattice .float_group > div .title{
    color: #bd1622;
    font-size: 24px;
    font-weight: bold;
    line-height: 1.1;
}
.lattice .float_group > div .text{
    color: #494949;
    margin: 10px 0 20px;
}
.lattice .float_group > div a{
    display: inherit;
    text-decoration: none;
}
.lattice .float_group > div button {
    position: relative;
    width: 120px;
    height: 40px;
    margin-left: calc(50% - 60px);
    border: 0;
    outline: 0;
    background: linear-gradient(to right, #225ac9, #83caf7);
    color: white;
    font-size: 14px;
    overflow: hidden;
    text-align: left;
    padding: 0 32px;
    transition: width .2s ease-in-out, background .2s ease-in-out;
    cursor: pointer;
}
.lattice .float_group > div button:hover {
    width: 130px;
}
.arrow_right {
    position: absolute;
    pointer-events: none;
    left: 130px;
    top: 14px;
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 10px solid white;
    transition: left .2s ease-in-out;
}
.lattice .float_group > div button:hover .arrow_right {
    left: 105px;
}

.step {
    padding: 80px 20px 20px;
    background-color: #dfebef;
    text-align: center;
}
.step .title {
    color: #1980cf;
    font-size: 24px;
    font-weight: bold;
    line-height: 1.1;
}
.step .text{
    color: #494949;
    margin-top: 10px;
}

.step .item{
    display: inline-block;
    margin: 20px 40px 0;
}
.step .item .text1{
    color: #1980cf;
    font-size: 20px;
}
.step .item .text2{
    color: #494949;
}

.step .note {
    font-size: 12px;
    text-align: right;
    margin-top: 60px;
    padding-right: 10%;
}
#form .header .text3 ul{
    padding-inline-start: 0;
}
.text3 ul li{
    list-style-type: none;
    float: left;
    height: 160px;
}
.text3 ul:nth-child(1) li:nth-child(2){
    padding-top: 22%;
}
.text3 ul:nth-child(3) li:nth-child(2){
    padding-top: 10%;
}
.text3 .jia{
    position: relative;
    top: -67px;
    padding-right: 10px;
}
.banner .logo {
    position: absolute;
    top: 5%;
    right: 0;
    width: 16.458%;
    height: 13.211%;
    cursor: pointer;
}
.text3{
    display: block;
}
.text3_mb{
    display: none;
}
.lattice_bottom{
    position: relative;
    /* background: linear-gradient(to top, #F6F6F6, #ECECEC); */
}
.lattice_bottom .top{
    width: 100%;
    text-align: center;
    position: absolute;
    top: 50px;
}
.lattice_bottom .top h4{
    color: #bd1622;
    font-size: 24px;
    font-weight: bold;
    line-height: 1.1;
}
.lattice_bottom .top p{
    color: #494949;
}
.lattice_bottom .bottom{
    width: 100%;
}
.lattice_bottom .bottom img{
    width: 100%;
    /* margin: 0 auto; */
}
#form .header .text3 img{
    width: 50%;
    margin: 20px auto 0;
}
.group .item img{
    width: 100px;
}
.group img{
    width: 50%;
    margin: 20px auto;
}
.note ul{
    padding-inline-start: 0;
    list-style: none;
}
.note ul li{
    text-indent: -9px;
    padding-left: 9px;
}
#form .body{
    background: #F3D6D8;
}

@media (max-width:1200px) {
    .lattice .float_group > div {
        width: 100%;
        height: unset;
        margin-top: 40px;
    }

    .lattice .float_group > div .flex_direction_vertically_center {
        padding: 0 30px;
    }

    .step .item{
        margin: 20px 26px 0;
    }
    .step .note {
        padding-right: 0;
    }
    .lattice_bottom .top p{
        width: 85%;
        margin: 0 auto;
        text-align: center;
    }
    #form .header .text3{
        width: 80%;
        margin: 0 auto;
    }
    #form .header .text3 img{
        width: 100%;
    }
    .lattice .float_group > div .text{
        margin: 10px 0 0;
    }
    .lattice_bottom .top{
        top: 40px;
    }
    .lattice_bottom .top h4{
        margin-top: 0;
    }
}


@media (max-width:768px) {
    
    .banner {
        padding-bottom: calc(1420/1080*100%);
    }

    .banner span {
        right: 10px;
        writing-mode: vertical-rl;
        -webkit-writing-mode: vertical-rl;
        text-orientation: upright;
    }

    .step .group {
        max-width: 300px;
        margin-left: auto;
        margin-right: auto;
    }
    .step .item{
        margin: 20px 10px 0;
    }
    
    .banner .logo {
        top: 1%;
        right: 28%;
        width: 42.458%;
        height: 13.211%;
    }
    .text3_mbtip{
        display: block;
        font-size: 12px;
        text-align: left;
        margin-left: 10px;
    }
}

@media (max-width: 320px){
    .text_mb span{
        font-size: 12px;
    }
    .lattice .float_group > div .flex_direction_vertically_center {
        padding: 0 10px;
    }
}