* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    font-family: sans-serif;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    height: 100%;
}
body {
    font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    background-color: #fff;
    margin: 0;
    min-height: 100%;
    color: #333333;
}
a {
    color: inherit;
    text-decoration: none;
    background-color: transparent;
}
ul{
    margin: 0;
    padding: 0;
    list-style: none;
}
/* 容器类样式 */
.body-container{
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
}
.about-us-container{
    background-image: url("../image/bg_aboutUs.webp");
    background-color: rgba(255, 255, 255, 1);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}
.service-container{
    background-image: url("../image/bg_service.webp");
    background-color: rgba(255, 255, 255, 1);
    background-size: 100% 100%;
    background-repeat: no-repeat;
    background-position: center center;
}
.service-container .grid-4-2-1{
    grid-column-gap: 2%;
    grid-row-gap: 20px;
}
.service-container .case-item img{
    width: 100%;
    display: block;
}
.fixed-bg-img{
    background-image: url("../image/bg_our_service.webp");
    background-position: left top;
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    transition: background 0.3s, border 0.3s, border-radius 0.3s, box-shadow 0.3s;
    padding: 200px 0;
    position: relative;
    z-index: 10;
}
.service-pattern-container .list-container{
    width: 450px;
    margin: 0 auto;
}
.service-pattern-container .list-container span{
    width: 110px;
    display: inline-block;
    font-weight: bold;
}
.contact-info-container {
    grid-column-gap: 2%;
    grid-row-gap: 30px;
}

.contact-info-container .contact-info-item {
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    padding: 40px 10px;
    text-align: center;
    color: #666666;
    display: block;
    width: 100%;
    line-height: 30px;
    transition: 0.3s;
}
.contact-info-container .contact-info-item:hover {
    scale: 1.05;
    background-color: white;
    box-shadow: 2px 2px 5px rgba(59, 79, 223, 0.3), -2px -2px 5px rgba(59, 79, 223, 0.3);
}
.contact-info-container .contact-info-item img.contact-icon{
    width: 70px;
    height: 70px;
}
img.bg_banner{
    display: block;
    width: 100%;
}
/* 元素排列对齐样式 */
.align-center{
    text-align: center;
}
.align-right{
    text-align: right;
}
.align-left{
    text-align: left;
}
.flex-row{
    display: flex;
    flex-direction: row;
}
.flex-column{
    display: flex;
    flex-direction: column;
}
.flex-align-center{
    align-items: center;
}
.flex-justify-between{
    justify-content: space-between;
}
.grid-4-2-1{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}
.grid-2-1{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}
/* 边距类样式 */
.padding-vertical-extra-large{
    padding: 40px 0;
}
.padding-vertical-large{
    padding: 30px 0;
}
.padding-vertical-normal{
    padding: 20px 0;
}
.padding-vertical-small{
    padding: 10px 0;
}
.padding-vertical-extra-small{
    padding: 6px 0;
}
.margin-top-extra-large{
    margin-top: 40px;
}
.margin-top-large{
    margin-top: 30px;
}
.margin-top-normal{
    margin-top: 20px;
}
.margin-top-small{
    margin-top: 15px;
}
.margin-left-small{
    margin-left: 5px;
}
/* 普通样式 */
img.logo{
    height: 55px;
    display: block;
}
img.banner {
    width: 100%;
    display: block;
}
img.icon-large{
    width: 50px;
    height: 50px;
}
img.icon-small{
    width: 20px;
    height: 20px;
}
.module-header,
.module-middle-header,
.module-small-header{
    color: #333333;
    font-size: 34px;
    font-weight: bold;
}
.module-middle-header{
    font-size: 28px;
}
.module-small-header{
    font-size: 20px;
}
.half-width{
    width: 50%;
}
.normal-text{
    line-height: 1.8;
    font-size: 16px;
    color: #404040;
    white-space: initial;
    word-break: break-all;
    word-wrap: break-word;
}
.bold-text{
    font-weight: bold;
}
.button{
    line-height: 46px;
    border-radius: 5px;
    text-align: center;
    background-color: steelblue;
    display: inline-block;
    color: white;
    padding: 0 15px;
}
.button:active{
    background-color: rgb(84,139,197);
}
.button-160{
    width: 160px;
}
@media screen and (max-width: 1439px) {
    .body-container{
        padding-left: 20px;
        padding-right: 20px;
    }
}
@media screen and (max-width: 991px) {
    /* 公共元素样式 */
    .body-container{
        padding-left: 15px;
        padding-right: 15px;
    }
    body,
    .normal-text{
        font-size: 14px;
    }
    img.logo{
        height: 50px;
    }
    .about-us-container .half-width{
        width: 70%;
    }
    .grid-4-2-1{
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-2-1{
        grid-template-columns: repeat(1, 1fr);
    }
    /* 边距类样式 */
    .padding-vertical-extra-large{
        padding: 30px 0;
    }
    .padding-vertical-large{
        padding: 25px 0;
    }
    .padding-vertical-normal{
        padding: 12px 0;
    }
    .padding-vertical-small{
        padding: 8px 0;
    }
    .padding-vertical-extra-small{
        padding: 6px 0;
    }
    .margin-top-extra-large{
        margin-top: 35px;
    }
    .margin-top-large{
        margin-top: 25px;
    }
    .margin-top-normal{
        margin-top: 12px;
    }
    .margin-top-small{
        margin-top: 8px;
    }
    .module-header{
        font-size: 30px;
    }
    .module-middle-header{
        font-size: 24px;
    }
    .module-small-header{
        font-size: 16px;
    }
}

@media screen and (max-width: 767px) {
    /* 公共元素样式 */
    .body-container{
        padding-left: 10px;
        padding-right: 10px;
    }
    .about-us-container .half-width{
        width: 80%;
    }
}
@media screen and (max-width: 479px) {
    .about-us-container .half-width{
        width: 90%;
    }
    .contact-info-container .contact-info-item {
        border-radius: 10px;
        padding: 20px 10px;
    }
    .contact-info-container .contact-info-item img.contact-icon {
        width: 40px;
        height: 40px;
    }
}