* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    width: 100%;
    min-height: 100vh;
}

.banner {
    width: 1140px;
    height: 360px;
    margin: 0 auto;
    background: red;
    margin-top: 150px;
    margin-bottom: 50px;
    position: relative;
}

.banner-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}


.banner_btn_group {
    position: absolute;
    display: flex;
    left: 50%;
    transform: translateX(-50%);
    bottom: 20px;
}
.banner_btn_group a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: 50px;
    background: #000;
    border-radius: 10px;
    margin-right: 10px;
    color: #fff;
    font-size: 14px;
}
.banner_btn_group a span{
    display: block;
    margin: 0 10px;
}
.banner_btn_group a i:nth-of-type(1){
    font-size: 23px;
}

/* !页面内容 */
.title1-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.title1-wrap span:nth-child(1) {
    font-size: 70px;
    color: #1e1e1e;
    margin-bottom: 20px;
    font-weight: bolder;
    text-indent: 1em;

}

.title1-wrap span:nth-child(2) {
    font-size: 20px;
    color: #616161;
    line-height: 1.6;

}

.service_list {
    position: relative;
    margin-top: 50px;
}

.service_list::after {
    content: '';
    position: absolute;
    height: 100%;
    border-left: 0.5px dashed #d4d4d4;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}


.service_list_item {
    height: 680px;
    /* background: red; */
    padding: 85px 0;
    position: relative;
    display: flex;
}

.service_list_item:before {
    content: "";
    position: absolute;
    display: inline-block;
    width: 10px;
    height: 10px;
    border: 1px solid rgba(30, 30, 30, .3);
    border-radius: 50%;
    box-sizing: border-box;
    top: -5px;
    left: calc(50% - 5px);
    background-color: #fff;
    z-index: 2;
}

.service_list_item::after {
    content: "";
    position: absolute;
    display: inline-block;
    width: 10px;
    height: 10px;
    border: 1px solid rgba(30, 30, 30, .3);
    border-radius: 50%;
    box-sizing: border-box;
    bottom: -5px;
    left: calc(50% - 5px);
    background-color: #fff;
    z-index: 2;
}



.item-left {
    position: relative;
    width: 50%;
    display: flex;
    flex-direction: column;
}

.item-icon {
    width: 80px;
    height: 80px;
    object-fit: cover;
    margin-bottom: 30px;
}

.item-icon-border {
    border: 1px solid #c7c7c7;
    border-radius: 20px;
}

.item-icon-radius {
    border: 1px solid #c7c7c7;
    border-radius: 20px;
}

.item-title {
    font-size: 40px;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: bold;
}

.item-tag {
    font-size: 18px;
    /* font-weight: 500; */
    color: #07b53b;
    margin-bottom: 10px;
    /* font-weight: bold; */
}

.item-desc {
    color: #777;
    line-height: 1.7;
    margin-bottom: 60px;
    font-size: 18px;
}

.item-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #a7a7a7;
    color: #1e1e1e;
    width: 160px;
    height: 60px;
    padding: 0 10px;
    border-radius: 3px;

}

.item-btn:hover {
    background: #07b53b;
    color: #fff;
}

.item-btn:hover img {
    filter: invert(100%) brightness(1);
}

.item-btn img {
    width: 20px;
    height: 20px;
    margin-right: 10px;
}

.item-btn span {
    font-size: 14px;

    font-weight: bold;
}

.item-right {
    /* position: relative; */
    width: 50%;
    /* background: red; */

}

.item-thumb {
    position: absolute;
    width: 575px;
    height: auto;
    z-index: 2;
}

.item-btn-group {
    display: flex;
    align-items: center;
}

.item-btn-group .bc-download-wrap {
    margin: 0;
    /* margin-right: px; */
    position: relative;
    z-index: 3;
}

.item-btn-group .bc-download-wrap li {
    border: 1px solid #a7a7a7;
}


.service_list_item:nth-last-child(1):after {
    content: "·";
    display: flex;
    justify-content: center;
    padding-left: 1px;
    padding-top: -6px;
    align-items: center;
    font-size: 30px;
    color: #b2b2b2;
    /* box-sizing: border-box; */
    border: 1px solid #b2b2b2;
    width: 20px;
    height: 20px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background-color: #fff;
    border-radius: 50%;
    line-height: 10px;
}



/* !communication_list */
.communication_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    /* justify-content: center; */
}

.communication_list li {
    width: 32%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.communication_list li span:nth-of-type(1) {
    font-size: 24px;
    margin: 36px auto 12px;
    font-weight: 700;
}

.communication_list li span:nth-of-type(2) {
    display: block;
    width: 360px;
    height: 10px;
    font-size: 14px;
    color: #616161;
    text-align: center;
}

.communication_list li:nth-child(-n+3) {
    /* 样式只应用于前3个带 .item 类的元素 */
    margin-bottom: 60px;
}

.product-wrap {
    display: flex;
}

.product-menu-wrap {
    width: 300px;
    position: relative;
}

.product-menu {
    width: 300px;

    /* background: blue; */

}

.product-menu-fixed {
    position: fixed;
    left: 365px;
    bottom: 50%;
    transform: translateY(50%);
    transition: all 0.2s;
}

.product-menu .menu-item {
    width: auto;
    /* max-width: 200px; */

    border-radius: 100px;
    border: 1px solid rgba(30, 30, 30, .2);
    font-weight: bolder;
    font-size: 12px;
    color: rgba(30, 30, 30, .7);
    padding: 8px 15px;
    /* display: inline-block; */
    float: left;
    clear: left;
    text-align: center;
    margin-bottom: 16px;
}

.menu-item-active {
    background: #07b53b;
    color: #fff !important;
}


.product-list {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    /* 3列，等宽 */
    gap: 50px;
    /* 网格间距 */
    min-height: 600px;
}

.product-item {
    width: 270px;
    height: 340px;
    background: #fff;
    box-shadow: 0 20px 20px 0 rgba(0, 0, 0, .1);
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 30px 35px;
    border-radius: 5px;
    overflow: hidden;
}

.product-item .product-item-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 16px;
}

.product-item .product-item-title {
    font-size: 22px;
    font-weight: bolder;
    margin-bottom: 8px;
    color: #1e1e1e;
}

.product-item .product-item-desc {
    color: #616161;
    font-size: 14px;
}

.product-item .item-btn-group {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    left: 0;
    top: 0;
    transition: all 0.5s;
    /* 移到初始状态这里 */
}

.product-item:hover .item-btn-group {
    background: rgba(0, 0, 0, 0.85);
    opacity: 1;
    /* 移除这里的transition */
}

.product-item:hover .item-btn-group a {
    border: 1px solid #fff;
    width: 150px;
    height: 50px;
    padding-left: 16px;
    margin-bottom: 20px;
    color: #fff;
    display: flex;
    align-items: center;
    border-radius: 5px;
}

.product-item:hover .item-btn-group img {
    width: 20px;
    height: 20px;
}

.product-item:hover .item-btn-group a:hover {
    background: #07b53b;
    border: none;

}

.product-item:hover .item-btn-group a img {
    margin-right: 10px;
}

.a-icon {
    display: block;
}

.d-icon {
    display: none;
}

.product-item:hover .item-btn-group a:hover .a-icon {
    display: none;
}

.product-item:hover .item-btn-group a:hover .d-icon {
    display: block;
}