*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Helvetica,"PingFang SC","Microsoft Yagei", sans-serif;
    font-size: 14px;
}
img{
    width: 100%;
}
/* 定义一个:root ，后边所有元素都可以用到 */
:root{
    --primary-color:#09a110;/*主色调*/
    --secondary-color:#e3e3e3;
    --text-color-lightest:#e7e9ec;
    --text-color-darker:#2e2e2e;
    --text-color-dark:#494949;
    --text-color-gray:#8b8b8b;
    --text-color-dark-gray:#727272;
    --text-color-light-gray:#c6c6c6;
    --backdrop-color:rgba(42,42,42,0.69);/*遮罩层颜色*/

}
header{
    width: 100vw;
    height: 60px;
    display: grid;/*栅格布局*/
    grid-template-columns: 1fr 2fr;
    padding: 0 20px;/*上下为0 ，左右为40个像素*/
    align-items: center;
    position: relative;
    z-index: 200;
}

.logo{
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color-lightest);
}

header nav{
    justify-self: end; /*放置在最后边*/
}
header nav i{
    color:var(--text-color-lightest);
    cursor: pointer;
}
header nav a{
    color:var(--text-color-lightest);
    text-decoration: none;
    margin: 0 24px;/*上下为0 ，左右为24个像素*/
}

header.burger{
    display: none;
}

header.sticky{
    position: fixed;
    background-color: white;
    box-shadow: 0 0 18px rgba(0, 0, 0, 0.1);
    animation: dropDown 0.5s ease-in-out forwards;
}
header.sticky .logo,
header.sticky nav a,
header.sticky nav i{
    color: var(--text-color-darker);
}
@keyframes dropDown{
    from {
        transform: translateY(-100px);
    }
    to{
        transform: translateY(0);
    }
}

.glide{
    position: relative;
    top: -80px;
    z-index: 50;
}

.glide__slide img,.glide__slide video{
    width: 100vw;
    height: 100vh;
    object-fit: cover;/*等比例的缩放*/
}

.slide-caption{
    position: absolute;
    z-index: 70;
    color: var(--text-color-lightest);
    text-align: center;
    max-width: 60vw;/*60vw表示占比60%*/
}

.glide__slide{
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-caption h1{
    font-size: 54px;
    font-weight: 600;
}
.slide-caption h3{
    font-size: 24px;
    margin: 48px 0;
}
.slide-caption.left{
    max-width: 80vw;
    text-align: left;
}

.slide-caption > *{ /*  “>*”只选中下一层（直接）的子元素*/
    opacity: 0;
}

.backdrop{
    background: var(--backdrop-color);
    position: absolute;
    z-index: 60;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0.5;/*透明度*/
}

.explore-btn{
    padding: 14px 32px;
    border: 0;
    border-radius: 4px;
    color: var(--text-color-lightest);
    background-color: var(--primary-color);
    font-size: 18px;
    cursor: pointer;
    outline: none;
}
.explore-btn span{
    display: inline-block;
    position: relative;
    transition: 0.5s;
}
.explore-btn span:after {
    content: '»';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -30px;
    transition: 0.5s;
}
.explore-btn:hover span {
    padding-right: 20px;
} 
.explore-btn:hover span:after {
    opacity: 1;
    right: 0;
}

/* 关于我们 */

/* 内容区域，通用样式 */
.content-wrapper{
    display: flex;
    align-items: center;/*垂直居中*/
    justify-content: center;/* 水平居中,只针对content */
    flex-direction: column;
}

section{
    display: grid;/*栅格布局*/
    justify-items: center;/* 水平居中,只针对所有的列的对齐方式 */
    max-width: 1180px;
    padding: 0 80px;
}
.section-bg{
    position: relative;
}
.section-bg::before{
    content: "";
    display: block;
    position: absolute;
    background-color: #f9fbfb;
    width: 100vw;
    height: 100%;
    z-index: -1;
}

.title1{
    font-size: 24px;
    color: var(--text-color-dark);
}
.title1::after{ /* ::after为尾元素*/
    content: "";
    display: block;
    width: 100%;
    height: 4px;
    background-color: var(--primary-color);
    margin-top: 14px;
    /* transform: translate(10%);  */
    /* translate（10%）为移动到x轴10% */
}

.intro{
    margin: 28px 0 60px 0;/* 距上边28px 距右边0 距下边60px 距左边0 */
    font-size: 18px;
    color: var(--text-color-dark-gray);
}

.about-us{
    padding-bottom: 32px;/*距离底部32px*/ 
}

.features{
    display: grid;
    grid-template-columns: repeat(4,1fr);/*grid的3列布局,repeat(3,1fr)其中3是重复3次，1fr是重复的位置；此处也可以写成1fr 1fr 1fr*/
    grid-template-rows: 126px; /* grid的2行布局*/
    column-gap: 5vw; /*列之间的间隙*/
}
.feature{
    display: grid;
    grid-template-areas: 
        "icon title"
        "icon content";/*自定义行和列布局的名字和位置,后面的子元素用到areas的地方可直接写这里边的内容*/
    grid-template-columns: 60px 1fr;
    grid-template-rows:1fr 3fr;
}
.feature i.fas{
    grid-area:icon;
    font-size: 34px;
    color: var(--primary-color);
}
.feature-title{
    grid-area: title;
    font-size: 18px;
    color: var(--text-color-darker);
}
.feature-content{
    grid-area: content;
    color: var(--text-color-gray);
    margin-top: 10px;
}
/* 成功案例 */
.showcases{
    max-width: unset;
    padding: 0;
    padding-top: 72px;
}
.filter-btns{
    margin-top: 54px;
    margin-bottom: 38px;
}
.filter-btn{
    margin:0 7px;
    background-color: var(--secondary-color);
    border: 0;
    color: var(--text-color-dark-gray);
    padding: 8px 18px;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.4s;
}
.filter-btn:focus,
.filter-btn:active{
    outline: none; /*也可以在。filter-btn中写outline:none，是一个效果*/
}

.filter-btn.active,
.filter-btn:hover{
    background-color: var(--primary-color);
    color: var(--text-color-lightest);
}

.showcases .cases{
    width: 100vw;
}
.showcases .case-item{
    width: 25vw;
    height: 20vw;
    overflow: hidden; /*缩放时超出的部分不可见*/
}

.case-item img{
    height: 100%;
    object-fit: cover;/*自动等比例缩放*/
}

/*服务流程部分*/
.service {
    padding-top: 131px;
}

.services{
    display: grid;
    grid-template-columns: repeat(3,1fr);
    grid-template-rows: 1fr;
    column-gap: 38px;
    row-gap: 34px;
    padding-bottom: 80px;
}
.service-item{
    display: grid;
    grid-template-areas: 
        "ser-icon ser-title"
        "ser-icon ser-content";
    grid-template-columns: 70px 1fr;/*第一列70px，剩下的填满整个剩余空间*/
    grid-template-rows: 1fr 3fr;
    padding: 24px;
    box-shadow: 0px 0px 18px rgba(0, 0, 0, 0.06);
}
.service-item:hover{
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);;
    transition: 0.5s;
}
.service-item i.fas{
    grid-area: ser-icon;
    font-size: 42px;
    color: var(--primary-color);
    padding: 6px;
}
.service-title{
    grid-area: ser-title;
    font-size:24px;
    color:var(--text-color-darker);
}
.service-item .service-content{
    grid-area: ser-content;
    color: var(--text-color-gray);
    line-height: 30px;
    font-size: 16px;
    margin-top: 8px;
}

/* 团队介绍 */
.team-intro{
    margin-top: 48px;
    padding-top: 62px;/* 上方内边距*/
    padding-bottom: 52px;
}
.team-members{
    display: grid;
    grid-template-columns: repeat(4,1fr);
    column-gap: 24px;
    margin-top: 86px;
}
.team-member{
    background-color: white;
    box-shadow: 0 0 24px rgba(0,0,0,0.2);
    text-align: center;
    display: grid;
    padding-bottom: 28px;
    transition: 0.4s;
    justify-items: center;
}
.team-member .profile-image{
    overflow: hidden;/* 蒙版 */
}
.profile-image img{
    width: 100%;
    height: 264px;
    object-fit: cover;/* 自动等比例缩放*/
    object-position: top center;/* 等比例缩放后的位置为图片的中上方，这样的显示更好 */
}
.team-member .name{
    margin-top: 18px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color-dark);
}
.team-member .position{
    margin-top: 12px;
    color: var(--text-color-dark-gray);
    margin-bottom: 18px;
}
.team-member .social-links{
    width: 100%;
    max-width: 200px;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(4,1fr);
    column-gap: 10px;
}
.team-member .social-links li{
    list-style: none;
}
.social-links li a{
    color: var(--text-color-dark);
    text-decoration: none;
}
.team-member:hover{
    transform: translateY(-20px) scale(1.05); /* -的就是往上走，+就是往上走,scale(1.05)是放大到1.05倍 */
    box-shadow: 0 0 36px rgba(0, 0, 0, 0.1);
}

/* 数据区域 */
.data-section{
    max-width: unset;
    height: 255px;
    display: grid;
    grid-template-columns: repeat(4,minmax(auto,220px));
    width: 100vw;
    background-image: url("images/adult-business-computer-contemporary-380769.jpg");
    background-size: cover;
    background-position: center;

    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 20;
}
.data-section::before{
    content: "";
    display: block;
    position: absolute;
    background-color: var(--backdrop-color);
    width: 100%;
    height: 100%;
    z-index: 1;
}
.data-piece{
    width: 255px;
    display: grid;
    grid-template-rows: repeat(3,1fr);
    color: white;
    justify-items: center;
    position: relative;
    z-index: 40;
}
.data-piece i.fas{
    font-size: 44px;
}
.data-piece .num{
    margin-top: 17px;
    font-size: 41px;
    font-weight: 600;
}
.data-piece .data-desc{
    font-weight: 500;
    font-size: 18px;
    padding-top:10px;
}

/* 公司动态 */
.company-activities{
    margin-top: 62px;
    margin-bottom: 62px;
}
.activities{
    display: grid;
    grid-template-columns: repeat(2,1fr);
    column-gap: 24px;
}
.activities3{
    display: grid;
    grid-template-columns: repeat(3,1fr);
    column-gap: 24px;
}
.activity{
    background-color: white;
    box-shadow: 0 0 24px rgba(0,0,0,0.2);
    padding-bottom: 28px;
    transition: 0.4s;
}
.activity:hover{
    transform: translateY(-20px) scale(1.05);
    box-shadow: 0 0 36px rgba(0, 0, 0, 0.1);
}
.activity .act-image-wrapper{
    overflow: hidden;
}
.activity img{
    width: 100%;
    /*height: 300px;*/
    object-fit: cover;/* 自动等比例缩放*/
    
}
.activity .meta{
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 10px 10px;
    color: var(--text-color-light-gray);
}
.activity .act-title,article{
    padding: 10px 10px;
}
.act-title{
    font-size: 18px;
}
article{
    color: var(--text-color-gray);
    letter-spacing: 0.54px;
    line-height: 24px;
}
.activity .read-more-btn{
    margin-left: 10px;
    border: 0;
    width: 30%;
    height: 40px;
    border-radius: 4px;
    color: var(--text-color-lightest);
    background-color: var(--primary-color);
    font-size: 18px;
    cursor: pointer;
    outline: none;
}
.read-more-btn span{
    display: inline-block;
    position: relative;
    transition: 0.5s;
}
.read-more-btn span:after {
    content: '»';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -30px;
    transition: 0.5s;
}
.read-more-btn:hover span {
    padding-right: 20px;
} 
.read-more-btn:hover span:after {
    opacity: 1;
    right: 0;
}


/* footer:联系我们(底部) */
footer{
    margin-top: 124px;
    background-color: #181818;
    display: grid;
    justify-items: center;
    padding-top: 72px;
    padding-bottom: 24px;
}
.footer-menus{
    width: 100%;
    max-width: 1180px;
    display: grid;
    grid-template-columns: 2fr repeat(7,1fr);
    padding: 0 80px;
    position: relative;
}
.menu-title{
    font-size: 16px;
    color: white;
    font-weight: 500;
    margin-bottom: 20px;
}
.contact-us{
    justify-self: start; /* 水平上在最开始的部分 */
    color: var(--text-color-lightest);
}
.contact-us p:not(:first-child){
    padding-bottom: 16px;
}
.menu-items li{
    list-style: none;
    padding-bottom: 8px;
}
.menu-items li a{
    text-decoration: none;
    font-weight: 300;
    color: var(--text-color-lightest);
}
.icp-info{
    margin-top: 24px;
    margin-bottom: 16px;
}
.icp-info,
.rights {
    grid-column: 1 / -1;/* 从编号为1到最后一个，-2就是倒数第二个 */
    justify-self: center;
    color: white;
}
.scrollToTop{
    display: none;
    position: relative;
    z-index: 300;
}
.scrollToTop a{
    width: 32px;
    height: 32px;
    color: white;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    text-decoration: none;
    position: fixed;
    bottom: 60px;
    right: 30px;
}

/* 实现响应式 */
@media(max-width:1100px){
    #home{ display: none;}
    header{

        grid-template-columns: 1fr;
        margin-bottom: 22px;
    }
    header nav {
        display: none;
    }
    header .logo{
        display: none;
    }
    header .burger{
        display: block;
        width: 20px;
        height: 6px;
        position: relative;
        justify-self: end;
        cursor: pointer;
    }
    .burger-line1,
    .burger-line2,
    .burger-line3{
        width: 20px;
        height: 2px;
        background-color: var(--text-color-lightest);
    }
    .burger-line1{
        position: absolute;
        top: -6px;
    }
    .burger-line3{
        position: absolute;
        top: 6px;
    }

    header.open nav{
        display: grid;
        position: absolute;
        left: 0;
        top: 0;
        width: 100vw;
        height: 100vh;
        background-color: white;
        grid-auto-rows: max-content;
        justify-items: end;

        padding: 0 40px;
        opacity: 0;
        animation: slideDown 0.6s ease-out forwards;
    }
    header.open nav > *{
        color: var(--text-color-darker);
        animation: showMenu 0.5s linear forwards 0.4s;
        font-size: 18px;
        margin: 4px 0;
        opacity: 0;
    }
    header.open nav > i.fas{
        margin-top: 10px;
    }

    header.open .burger-line1,
    header.open .burger-line2,
    header.open .burger-line3,
    header.sticky .burger-line1,
    header.sticky .burger-line2,
    header.sticky .burger-line3{
        background-color: var(--text-color-darker);
        transition: 0.4s ease;
    }

    header.open .burger-line1{
        transform: rotate(45deg) translate(3px,5px);/* rotate(45deg)是旋转45度*/
    }
    header.open .burger-line2{
        transform:translateX(5px);
        opacity: 0;/*透明的，不可见*/
    }
    header.open .burger-line3{
        transform: rotate(-45deg) translate(3px,-5px);
    }

    header.open .logo{
        z-index: 40;
        color: var(--text-color-darker);
    }

    @keyframes slideDown{
        from{
            height: 0;
            opacity: 0;
        }
        to{
            height: 100vh;
            padding-top: 80px;
            opacity: 1;
        }
    }
    @keyframes showMenu{
        from{
            opacity: 0;
            transform: translateY(-1vh);
        }
        to{
            opacity: 1;
            transform: translateY(0);
        }
    }
    .service-item .service-title{
        font-size: 20px;
    }
    .service-item .service-content{
        font-size: 14px;
        line-height: 24px;
    }
    .team-members{
        grid-template-columns: repeat(2,1fr);
        row-gap: 36px;
        column-gap: 6vw;/* vw是浮动的 */
    }
    .activities{
        grid-template-columns: repeat(2,1fr);
        row-gap: 36px;
    }
}

@media(max-width:992px){
    .slide-caption h1{
        font-size: 48px;
    }
    .slide-caption h3{
        font-size: 18px;
    }

    .features,.services{
        grid-template-columns: repeat(2,1fr);
        grid-template-rows: unset;
    }

    .data-section {
        grid-template-columns: repeat(2,minmax(200px,auto));
        padding: 24px 0;
        height: auto;
        row-gap: 24px;
        background-size: 200%;
    }
    .showcases .case-item{
        width: calc(100vw/3);
    }
}
@media(max-width:768px){
    section,.footer-menus{
        padding: 0 40px;
    }
    .footer-menus{
        grid-template-columns: 2fr repeat(2,1fr);
    }
    .contact-us{
        grid-row: 1/3;
    }
    .footer-menu{
        text-align: right;
    }
    .activities{
        grid-template-columns: 1fr;
        row-gap: 36px;
    }
    .activities3{
        grid-template-columns: 1fr;
        row-gap: 36px;
    }
    .data-section{
        grid-template-columns: 1fr;
        background-size: 300%;
    }
    .team-members{
        grid-template-columns: minmax(200px,400px);
    }
    .features,.services{
        grid-template-columns: 1fr;
    }
    .showcases .case-item{
        width: calc(100vw/2);
        height: 30vw;
    }
}

@media(max-width:576px){
    .slide-caption h1{
        font-size: 28px;
    }
    .slide-caption h3{
        font-size: 14px;
    }
    .explore-btn{
        font-size: 14px;
        padding: 8px 18px;
    }
    .showcases .case-item{
        width: 100vw;
        height: 60vw;
    }
    .footer-menus{
        grid-template-columns: 1fr;
        row-gap: 20px;
    }
    .footer-menu{
        justify-self: start;
        text-align: left;
    }
}


.home-search {
	height: 50px;
	color: #fff;
	font-size: 14px;
	line-height: 50px;
	background-color: #5c5f60;
    width: 100%;
    max-width: 100%;
    top: -80px;
    position: relative;
}

.home-search a {
	color: #fff;
	padding: 0 5px
}

.home-search a:hover {
	text-decoration: underline
}

.home-search .form-input {
	width: 100%;
	border: 0;
	padding: 7px 10px;
	padding-right: 50px;
	font-family: "微软雅黑"
}

.home-search .button {
	border: 0;
	z-index: 1;
	width: 22px;
	height: 22px;
	vertical-align: top;
	display: inline-block;
	position: relative;
	margin-left: -40px;
	padding: 0;
	margin-top: -2px
}

.home-search .pull-left {
	width: 40%
}

.home-search .hots {
	height: 50px;
	width: 60%;
	overflow: hidden;
	padding-left: 50px;
	line-height: 50px;
	display: inline-block
}

@media (max-width:500px) {
	.home-search .pull-left {
		width: 100%
	}

	.home-search .hots {
		display: none
	}
}