@charset "utf-8";

.banner {
    position: relative;
    overflow: hidden;
}

.banner img {
    display: block;
    width: 100%;
}

.banner a {
    display: block;
    position: relative;
}

.banner .slick {
    position: relative;
    z-index: 9;
}

.banner .slick-slide a {
    display: block;
    position: relative;
}


.banner .slick-slide a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: url("https://www.lets-develop.com/images/banner-zzc.png") repeat-x;
    background-position: center top;
    z-index: 9;
}

.banner .slick-slide a::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: url("https://www.lets-develop.com/images/banner-zzc2.png") repeat-x;
    background-position: center bottom;
    z-index: 1;
}

.banner .slick-dots li button::before {
    content: '0';
}

.banner .slick-dots li button {
    font-size: 22px;
    color: #ffffff;
    display: block;
    width: auto;
    height: auto;
    padding: 0;
    line-height: 1;
}

.banner .slick-dots li {
    width: auto;
    height: auto;
    display: block;
    padding: 38px 0;
}

.banner {
    position: relative;
}

.banner .slick-dots li::after {
    content: '';
    width: 2px;
    height: 0px;
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%);
    background-color: #ff9900;
    transition: all 0.5s;
}

.banner .slick-dots li::before {
    content: '';
    width: 2px;
    height: 0px;
    position: absolute;
    left: 50%;
    top: -10px;
    transform: translateX(-50%);
    background-color: #ff9900;
    transition: all 0.5s;
}

.banner .slick-dots li.slick-active:after {
    height: 40px;
}

.banner .slick-dots li.slick-active::before {
    height: 40px;
}

.banner .slick-dots li.slick-active button::after {
    content: '';
    width: 8px;
    height: 30px;
    background: url("https://www.lets-develop.com/images/banner-dotsbj.png") no-repeat;
    background-size: cover;
    position: absolute;
    top: 50%;
    right: -10px;
    transform: translateY(-50%);
}

.banner .slick-dots {
    position: absolute;
    top: 50%;
    bottom: auto;
    right: 2%;
    transform: translateY(-50%);
    width: auto;
}

/* index */

.s1 {
    background: url("https://www.lets-develop.com/images/s1-bj.jpg") no-repeat left top 60px;
    background-size: cover;
    padding-bottom: 100px;
}

.s1-link ul li a {
    padding: 40px 0;
    text-align: center;
    background-color: #ffffff;
    box-shadow: 0px 5px 15px 0px rgba(0, 51, 153, 0.3);
    border-radius: 10px;
    border: solid 3px #0066cc;
    margin: 20px 15px;
}

.s1-link ul li a h3 {
    font-size: 30px;
    line-height: 36px;
    color: #333333;
    font-weight: 600;
}

.s1-link ul li a:hover h3 {
    color: #0066cc;
}

.s1-link .slick-slider {
    padding: 0 100px;
}

.s1-link .slick-prev {
    width: 18px;
    height: 32px;
    opacity: 0.6;
    background: url("https://www.lets-develop.com/images/banner-l.png") no-repeat;
    background-size: cover;
    left: 70px;
}

.s1-link .slick-next {
    width: 18px;
    height: 32px;
    opacity: 0.6;
    background: url("https://www.lets-develop.com/images/banner-r.png") no-repeat;
    background-size: cover;
    right: 70px;
}

.s1-link .slick-prev:hover {
    opacity: 1;
}

.s1-link .slick-next:hover {
    opacity: 1;
}

.s1-link {
    margin-bottom: 100px;
    margin-top: -60px;
    position: relative;
    z-index: 10;
}

.tit {
    position: relative;
}

.tit b {
    font-size: 32px;
    font-weight: bold;
    color: #0066cc;
}

.tit a {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);

    font-size: 16px;
    line-height: 20px;
    color: #333333;
    background: url("https://www.lets-develop.com/images/more.png") no-repeat left center;
    padding-left: 32px;
}

.tit a:hover {
    color: #0066cc;
}

.s1-list {
    width: 31%;
    box-shadow: 0px 0px 25px 0px rgba(0, 51, 153, 0.15);
    padding: 25px 20px;
    border-top: 8px solid #0066cc;
}

.s1-c .s1-list:nth-child(1) {
    background-color: #fffdf7;
}

.s1-c .s1-list:nth-child(2) {
    background-color: #f3fbff;
}

.s1-c .s1-list:nth-child(3) {
    background-color: #ffffff;
}

.s1-c {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.s1-list ul li a {
    padding: 25px 0;
    border-bottom: dashed 1px #d2d2d2;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.s1-list ul li a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0%;
    height: 1px;
    background-color: #0066cc;
    transition: all 0.5s;

}

.s1-list ul li:last-child a {
    border: none;
}

.s1-date {
    text-align: center;
    float: left;
    width: 52px;
}

.s1-list ul li a p {
    width: calc(100% - 88px);
}

.s1-date b {
    font-size: 36px;
    color: #0066cc;
    display: block;
    line-height: 26px;
    margin-bottom: 8px;
}

.s1-date span {
    font-size: 14px;
    color: #999999;
    line-height: 10px;
    display: block;
}

.s1-list ul li a p {
    font-size: 18px;
    line-height: 28px;
    max-height: 56px;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #333333;
}

.s1-list ul li a:hover p {
    color: #0066cc;
    font-weight: 600;
}

.s1-list ul li a:hover {
    border-color: transparent;
}

.s1-list ul li a:hover:after {
    width: 100%;
}

/* s2 */
.s2 {
    padding-top: 80px;
    padding-bottom: 90px;
    background: url("https://www.lets-develop.com/images/s2-bj.png") no-repeat;
    background-size: cover;
}

.s2-tit {
    text-align: center;
    font-size: 0;
    margin-bottom: 88px;
}

.s2-tit b {
    font-size: 24px;
    font-weight: bold;
    color: #ffffff;
    position: relative;
    margin: 0 30px;
    cursor: pointer;
}

.s2-tit b.on {
    font-size: 28px;
    color: #ffcc66;
}

.s2-tit b.on::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -35px;
    transform: translateX(-50%);
    width: 100%;
    height: 25px;
    background: url("https://www.lets-develop.com/images/s2-titbj.png") no-repeat;
    background-size: 100%;
}

.s2-list .slick-slide ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.s2-list .slick-slide ul li {
    width: 49%;
    margin-bottom: 20px;
}

.s2-list ul li a {
    line-height: 60px;
    background-color: rgba(255, 255, 255, 0.15);
    padding: 0 20px;
}

.s2-list ul li a span {
    font-size: 16px;
    color: #ffffff;
    float: left;
    padding-left: 30px;
    background: url("https://www.lets-develop.com/images/s2-date.png") no-repeat left center;
    margin-right: 20px;
    padding-right: 20px;
    display: block;
    position: relative;
}

.s2-list ul li a span::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 1px;
    height: 53%;
    background-color: #ffffff;
    opacity: 0.43;
}

.s2-list ul li a p {
    font-size: 18px;
    color: #ffffff;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s2-list ul li a:hover {
    background-color: rgba(255, 255, 255, 0.88);
    box-shadow: 0px 0px 25px 0px rgba(0, 51, 153, 0.15);
}

.s2-list ul li a:hover p {
    color: #333333;
}

.s2-list ul li a:hover span {
    color: #0066cc;
    background: url("https://www.lets-develop.com/images/s2-dateh.png") no-repeat left center;
}

.s2-list ul li a:hover span::after {
    background-color: #999;
}

.s2-list {
    position: relative;
}

.s2-more {
    position: absolute;
    bottom: 0;
    right: 0;
    padding-left: 32px;
    font-size: 16px;
    line-height: 26px;
    color: #ffffff;
    background: url("https://www.lets-develop.com/images/s2-more.png") no-repeat left center;
}

.s2-more:hover {
    opacity: 0.7;
}

.s2-list .slick-slider {
    padding-bottom: 60px;
}

.s2-list .slick-dots li {
    width: 32px;
    height: 7px;
    border-radius: 3px;
    border: solid 1px #479cf0;
}

.s2-list .slick-dots li.slick-active {
    background-color: #ffcc66;
    border-color: #ffcc66;
}

.s2-c {
    position: relative;
}

.s2-list {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    opacity: 0;
    transition: all 0.5s;
}

.s2-list.on {
    position: relative;
    z-index: 1;
    opacity: 1;
}

/* s3 */
.s3 {
    padding: 80px 0;
    background: url("https://www.lets-develop.com/images/s3-bj.jpg") no-repeat;
    background-size: cover;
}

.s3 .tit {
    margin-bottom: 35px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.s3-l {
    width: 54%;
    float: left;
}

.s3-line {
    width: calc(100% - 250px);
    height: 1px;
    background-color: #b2d1f0;
}

.s3 .tit b {
    padding-left: 20px;
    line-height: 29px;
    border-left: 5px solid #0066cc;
    display: block;
}

.s3 .tit a {
    position: static;
    transform: translateY(0);
}

.s3-banner .pic {
    width: 100%;
    height: 443px;
    padding-top: 0;
}

.s3-banner a {
    position: relative;

}

.s3-banner a::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, .1), rgba(0, 0, 0, 0.5));
    z-index: 1;
}

.s3-tx {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    z-index: 2;
    padding: 20px 30px;
}

.s3-tx span {
    display: block;
    padding-left: 30px;
    background: url("https://www.lets-develop.com/images/s2-date.png") no-repeat left center;
    line-height: 20px;
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 10px;
}

.s3-tx p {
    font-size: 20px;
    color: #ffffff;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s3-banner .slick-prev {
    width: 26px;
    height: 50px;
    background: url("https://www.lets-develop.com/images/banner-l.png") no-repeat;
    background-size: 100%;
    left: 10px;
    transition: all 0.5s;
}

.s3-banner .slick-next {
    width: 26px;
    height: 50px;
    background: url("https://www.lets-develop.com/images/banner-r.png") no-repeat;
    background-size: 100%;
    right: 10px;
    transition: all 0.5s;
}

.s3-banner {
    box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.2);
    margin-bottom: 15px;
}

.s3-banner .slick-arrow:hover {
    opacity: 0.7;
}

.s3-bot ul li a span {
    font-size: 16px;
    color: #666;
    float: left;
    padding-left: 30px;
    background: url("https://www.lets-develop.com/images/s2-dateh.png") no-repeat left center;
    margin-right: 20px;
    padding-right: 20px;
    display: block;
    position: relative;
}

.s3-bot ul li a span::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    width: 1px;
    height: 45%;
    background-color: #999;
    opacity: 0.43;
}

.s3-bot ul li a p {
    font-size: 18px;
    color: #333;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s3-bot ul li a {
    border-bottom: 1px solid #c2defa;
    padding: 0 30px;
    line-height: 70px;
}

.s3-bot ul li a:hover span,
.s3-bot ul li a:hover p {
    color: #0066cc;
}

.s3-r {
    float: right;
    width: 40%;
}

.s3-list ul li a {
    padding: 20px 30px;
    background-color: #f0f7fe;
    position: relative;
    transition: all 0.5s;
}

.s3-list ul li {
    margin-bottom: 30px;
}

.s3-list ul li:last-child {
    margin-bottom: 0;
}

.s3-list ul li a h3 {
    font-size: 20px;
    color: #333333;
    margin-bottom: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s3-list ul li a p {
    font-size: 14px;
    line-height: 24px;
    height: 48px;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #666666;
}

.s3-list ul li a:hover {
    background-color: #ffffff;
    box-shadow: 0px 0px 25px 0px rgba(0, 51, 153, 0.15);
}

.s3-list ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 16.5%;
    transform: translate(-50%, 100%);
    border-top: 10px solid #f0f7fe;
    border-right: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 10px solid transparent;
    transition: all 0.5s;
}

.s3-list ul li:nth-child(odd) a::after {
    left: 16.5%;
    right: auto;
}

.s3-list ul li:last-child a::after {
    content: none;
}

.s3-list ul li a:hover:after {
    border-top: 10px solid #fff;
    filter: drop-shadow(0px 0px 25px 0px rgba(0, 51, 153, 0.15));
}
















































@media screen and (max-width:1600px) {

    .banner .slick-dots {
        transform: translateY(-50%) scale(0.8);
    }
}

@media screen and (max-width:1400px) {

    .banner .slick-dots {
        transform: translateY(-50%) scale(0.7);
    }

}

@media screen and (max-width:1024px) {
    .banner .slick-dots {
        transform: translateY(-50%) scale(0.6);
    }

    .s1-link .slick-slider {
        padding: 0;
    }

    .s1-link .slick-arrow {
        display: none !important;
    }

    .s1-link ul li a {
        padding: 20px 0;
    }

    .s1-link ul li a h3 {
        font-size: 24px;
    }
    .s1-link{
        margin-bottom: 30px;
    }

    .s1-list{
        width: 100%;
        margin-top: 20px;
    }
    .s1-date b,
    .tit b{
        font-size: 26px;
    }
    .s1{
        padding-bottom: 50px;
    }

    .s2{
        padding: 50px 0;
    }
    .s2-tit{
        margin-bottom: 50px;
    }
    .s2-tit b{
        font-size: 20px;
    }
    .s2-tit b.on{
        font-size: 24px;
    }
    .s3-l{
        float: none;
        width: auto;
        margin-right: 0;
        margin-bottom: 50px;
    }
    .s3-banner .pic{
        padding-top: 56.25%;
        height: auto;
    }
    .s3-r{
        float: none;
        width: auto;
    }
    .s3{
        padding: 50px 0;
    }
}

@media screen and (max-width:768px) {
    .s3{
        padding: 30px 0;
    }
    .banner .slick-dots {
        display: none !important;
    }

    .banner .slick-dots {
        transform: translateY(-50%) scale(0.5);
    }

    .s1-link ul li a {
        padding: 15px 0;
    }

    .s1-link ul li a h3 {
        font-size: 20px;
    }
    .s1-link{
        margin-bottom: 0px;
    }
    .s1-date b,
    .tit b{
        font-size: 22px;
    }
    .s1-list ul li a p{
        font-size: 16px;
    }
    .tit a{
        font-size: 14px;
    }
    .s1-list ul li a{
        padding: 15px 0;
    }
    .s1{
        padding-bottom: 30px;
    }
    .s2-list ul li a p{
        font-size: 16px;
    }
    .s2-list .slick-slide ul li{
        width: 100%;
    }
    .s2-list .slick-slider{
        padding-bottom: 30px;
    }

    .s2-list ul li a{
        line-height: 50px;
    }
    .s2-list ul li a span{
        font-size: 14px;
    }
    .s2-tit b{
        margin: 0 20px;
    }
    .s3-bot ul li a span{
        font-size: 14px;
    }
    .s3-bot ul li a p{
        font-size: 16px;
    }
    .s3-bot ul li a{
        line-height: 60px;
    }
    .s3-tx p{
        font-size: 18px;
    }
    .s3-banner .slick-arrow{
        display: none !important;
    }
    .s3-l{
        margin-bottom: 30px;
    }
    .s3-list ul li{
        margin-bottom: 20px;
    }
    .s3 .tit{
        margin-bottom: 20px;
    }
    .s3-tx{
        padding: 10px 20px;
    }
}

@media screen and (max-width:480px) {
    .s3-bot ul li a{
        padding: 0 10px;
    }
    .s1-link ul li a{
        margin: 10px;
    }
    .s1-link ul li a h3 {
        font-size: 18px;
    }
    .s2-tit b{
        margin: 0 10px;
    }
    .s2-tit b.on{
        font-size: 20px;
    }
    .s2-tit b{
        font-size: 18px;
    }

    .s3-list ul li a h3{
        font-size: 18px;
    }
    .banner .slick-slide a::before,
    .banner .slick-slide a::after{
        content: none;
    }
}