*{
    margin: 0;
    padding: 0;
    font-size: 14px;
    box-sizing: border-box;
    font-family: Helvetica, "PingFang SC","Microsoft Yahei",sans-serif;
}

img{
    width: 100%;

}

:root{
    --primary-color:#ff434f;
    --secondary-color:#e3e3e3;
    --text-color-lightest:#e7e9ec;
    --text-color-darker:#2e2e2e;
    --text-color-dark:#494949;
    --text-color-gray:#8b8b8b;
    --tetx-color-dark-gray:#727272;
    --text-color-light-gray:#c6c6c6;
    --backdrop-color:rgb(42,42,42,0.69);
}

header{
    width: 100vw;
    height: 80px;
    display: grid; /*  栅格布局 */
    padding: 0 40px;

    grid-template-columns: 1fr 2fr;
    align-items: center;   /*垂直居中*/
    position: relative;/*绝对定位*/
    z-index: 200;/*最顶部*/
}


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

header nav{
    justify-self: end;
}

header nav i{
    color: var(--text-color-lightest);
}

header nav a{
    color: var(--text-color-lightest);
    text-decoration: none;/*去下划线*/
    margin: 0 24px;/*上下是0，左右是24像素*/
}

header .burger{
    display: none;
}

header.sticky{
  position: fixed;
  background-color: white;
  box-shadow: 0 0 18px rgba(0,0,0,0.2);
  animation: dropDown 0.5s ease-in-out forwards;
}

header.sticky .logo,
header.sticky nav a,
header.sticky nav i{
  color: var(--text-color-dark);
}

@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;
}

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

.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: center;
}

.slide-caption > *{
    opacity: 2;

}

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

.explore-btn{
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;/*去边框*/
    border-radius: 4px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;/*鼠标移上去小手的形状*/
    outline: none;/*去掉点击按钮有蓝色的边框*/
}


/*内容区域*/
/*同意样式*/

.content-wrapper{
    display: flex;
    align-items: center;/*垂直居中*/
    justify-content: center;/*水平居中*/
    flex-direction: column;/*列的方式布局*/
}

section{
    display: grid;/*栅格布局*/
    justify-items: center;/*栅格布局对列的内容水平居中*/
    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: 34px;
    color: var(--text-color-darker);
}

.title1::after{
    content: "";
    display: block;
    width: 80%;
    height: 4px;
    background-color: var(--primary-color);
    margin-top: 14px;
    transform: translateX(10%);
}

.intro{
    margin: 28px 0 60px 0;
    font-size: 18px;
    color: var(--tetx-color-dark-gray);
}

/* 关于我们 */
.about-us {
    padding-bottom: 32px;
    padding-top: 131px;
  }
  
  .features {
    display: grid;
    /* 重复几次，重复的值  1fr：容器宽度的1/3*/
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 126px 126px;
    column-gap: 5vw;
  }
  
  .feature {
    display: grid;
    grid-template-areas:
      "icon title"
      "icon content";
    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: 8px;
  }

  /* 成功案例 */
.showcases {
    max-width: unset;
    padding: 0px;
    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;/*圆角*/
    cursor: pointer;/*鼠标移上去的时候变成小手*/
    transition: 0.4s;/*指上去的时候有个过渡效果*/
  }
  
  .filter-btn:focus,
  .filter-btn:active {
    outline: none;
  }
  
  .filter-btn.active,
  .filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
  }
  
  .showcases .cases {
    width: 100vw;
  }
  
  .showcases .case-item {
    width: 25vw;
    height: 20vw;
    overflow: hidden;
  }
  
  .case-item img {
    height: 100%;
    object-fit: cover;
  }



/*团队介绍*/
.team-intro{
    margin-top: 48px;
    padding-top: 62px;
    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: 0px 0px 24px rgb(0,0,0,0.2);
    text-align: center;
    padding-bottom: 28px;

    transition: 0.4s;

    display: grid;
    justify-items: center;
}

.profile-image{
    overflow: hidden;
}

.profile-image img{
    width: 100%;
    height: 264px;
    object-fit: cover;
    object-position: top center;
}

.team-member .name{
    margin-top: 10px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color-dark);
}

.team-member .position{
    color: var(--tetx-color-dark-gray);
    margin-top: 12px;
    margin-bottom: 18px;
}

.social-links{
    width: 100%;
    max-width: 200px;
    display: flex;
    justify-content: space-between;
    padding: 0 42px;
}

.social-links li{
    list-style: none;/*去掉黑点*/
}

/* .social-links li a{
    color: var(--text-color-dark);
    font-size: 20px;
    text-decoration: none;
} */

.team-member:hover{
    transform: translate(-20px) scale(1.05);
    box-shadow: 0px 0px 36px rgb(0,0,0,0.1);
}

/*公司动态*/
.company-activities {
    margin-top: 80px;
  }
  
  .activities {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    column-gap: 24px;
  }
  
  .activity {
    box-shadow: 0px 0px 24px rgba(0, 0, 0, 0.1);
    padding: 24px;
    transition: 0.4s;
  }
  
  .act-image-wrapper {
    height: 255px;
    overflow: hidden;
    margin: -24px;
    margin-bottom: 0;
  }
  
  .act-image-wrapper img {
    min-height: 300px;
    object-fit: cover;
  }
  
  .activity .meta {
    margin-top: 20px;
    margin-bottom: 12px;
    color: var(--text-color-light-gray);
    font-size: 12px;
    display: flex;
  }
  
  .activity .meta > p:last-child {
    margin-left: 36px;
  }
  
  .act-title {
    color: var(--text-color-dark);
    font-size: 18px;
    margin-bottom: 16px;
  }
  .activity article {
    color: var(--text-color-gray);
    letter-spacing: 0.54px;
    line-height: 24px;
  }
  
  .read-more-btn {
    border: 0;
    color: white;
    background-color: var(--primary-color);
    padding: 6px 14px;
    margin-top: 24px;
    border-radius: 4px;
  }  

  .activity:hover{
    transform: translate(-20px) scale(1.05);
    box-shadow: 0px 0px 36px rgb(0,0,0,0.1);
  }

  /*底部信息*/
  footer{
    margin-top: 12px;
    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(4,1fr);
    padding: 0 80px;
    position: relative;
  }

  .menu-title{
    font-size: 16px;
    color: white;
    font-weight: 500;
    margin-bottom: 20px;
  }

  .contact-us{
    justify-self: start;
    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;
    justify-self: center;
    color: white;
  }

  .scrollToTop{
    display: none;
    position: relative;
    z-index: 300;
  }

  .scrollToTop a{
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    position: fixed;
    bottom: 60px;
    right: 30px;
  }

  @media(max-width:1100px){
    header nav{
      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 .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);
    }

    header.open .burger-line2{
      transform: translate(5px);
      opacity: 0;
    }

    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;
    }

    .activities{
      grid-template-columns: repeat(1,1fr);
      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;
    }
  
    .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);
      row-gap: 24px;
    }
    .contact-us{
      grid-row: 1 / 3;
    }
    .footer-menu{
      text-align: right;
    }
    .activities{
      grid-template-columns: 1fr;
      row-gap: 36px;
    }
    .team-members{
      grid-template-columns: minmax(200px,400px);
    }
  }

  @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;
    }
    .footer-menu{
      justify-self: start;
      text-align: left;
    }
  }