.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(1.1);}
    40%  {opacity: 1;}
    50%  {opacity: 1;}
    65%  {opacity: 0;transform: scale(1.1);}
    90%  {opacity: 0;transform: scale(1);}
    100% {opacity: 0;}
}

@keyframes slideBannerB {
    0%   {opacity: 0; transform: scale(1);}
    30%  {opacity: 1; transform: scale(1.1);}
    40%  {opacity: 1;}
    50%  {opacity: 1;}
    65%  {opacity: 0;transform: scale(1.1);}
    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;
}

/* main_content */
.main_content{
    width: 100%;
    margin: 0 auto;
}
.details_box, .discount_box{
    width: 100%;
    margin: 0 auto;
}
.details_box img{
    width: 100%;
}

.discount_box{
    padding:100px 0;
}
.discount_box img{
    max-width: 60%; 
    margin: 0 auto;
}

/* form */
.note ul{
    list-style: none;
    padding-inline-start: 0;
    margin-bottom: 0;
}
.note ul li{
    text-indent: -8px;
    padding-left: 8px;
}
.arrow_down{
    left: auto;
    right: 15px;
}


.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%;
}

.logo {
    position: absolute;
    top: 0;
    right: 43.5%;
    width: 13.529%;
    height: 17.37%;
    cursor: pointer;
}

@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 40px;
    }

    .step .item{
        margin: 20px 26px 0;
    }
    .step .note {
        padding-right: 0;
    }
}

@media (max-width:768px) {
    .banner {
        padding-bottom: calc(1460/1020*100%);
    }

    .banner span {
        right: 10px;
        writing-mode: vertical-rl;
        -webkit-writing-mode: vertical-rl;
        text-orientation: upright;
    }
    .discount_box {
        padding: 50px 0;
    }
    .discount_box img{
        width: 100%; 
        margin: 0 auto;
    }
	.discount_box img {
		max-width: 90%;
	}

    .step .group {
        /*max-width: 300px;*/
        margin-left: auto;
        margin-right: auto;
    }
    .step .item{
        margin: 20px 10px 0;
    }
    .smile{
        width: 100% !important;
    }
    .smile1 {
        margin: 20px 0px 0 !important;
    }
    .text5{
        padding: 0 40px;
    }
}