/* 初始化所有样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Helvetica, "PingFang SC", "Microsoft Yahei", sans-serif;
    font-size: 14px;
  }
  
  img {
    width: 100%;
  }
  
  :root {
    --primary-color: #23ff1c57;
    --secondary-color: #e3e3e3;
    --text-color-lightest: #ffffff;
    --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, 0.7);
  }
  
  /* 栅格布局 */
  header {
    width: 100vw;
    height: 80px;
    display: grid;
    padding: 0 40px;
  
    grid-template-columns: 1fr 2fr;
    align-content: center;
    position: relative;
    z-index: 200;
  }
  
  .logo {
    font-size: 30px;
    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;
    margin: 0 24px;
  }
  
  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-darker);
  }
  
  @keyframes dropDown {
    from {
      transform: translateY(-100px);
    }
    to {
      transform: translateY(0);
    }
  }
  
  /* 轮播图 */
  .glide {
    position: relative;
    top: -80px;
    z-index: 50;
  }
  
  .glide__slide img,
  .glide__slide video {
    width: 100vw;
    height: 100vh;
    /* 自动等比例缩放 */
    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: 80px;
    font-weight: 600;
  }
  
  .slide-caption h3 {
    font-size: 30px;
    margin: 48px 0px;
  }
  
  .slide-caption.left {
    max-width: 80vw;
    text-align: left;
  }
  
  .slide-caption > * {
    opacity: 0;
  }
  
  .backdrop {
    background: var(--backdrop-color);
    z-index: 60;
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0.5;
  }
  
  .explore-btn {
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;
    border-radius: 4px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;
    outline: none;
  }
  
  /* 内容区域 */
  /* 通用样式 */
  .content-wrapper {
    /* 一维排版 */
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }
  
  section {
    /* 二维 */
    display: grid;
    /* 每个列的对齐方式 */
    justify-items: center;
    max-width: 1280px;
    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;
    /* text-indent: 2em; */
    font-size: 18px;
    color: var(--text-color-dark-gray);
  }
  
  /* 关于我们 */
  .about-us {
    padding-bottom: 32px;
  }
  
  .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;
    cursor: pointer;
    transition: 0.4s;
  }
  
  .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;
  }
  
  /* 服务流程 */
  .service {
    padding-top: 131px;
  }
  
  .services {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 1fr 1fr;
    column-gap: 38px;
    row-gap: 34px;
  }
  
  .service-item {
    display: grid;
    grid-template-areas:
      "icon title"
      "icon content";
    grid-template-columns: 70px 1fr;
    grid-template-rows: 1fr 3fr;
    padding: 24px;
    box-shadow: 0px 0px 18px rgba(0, 0, 0, 0.06);
  }
  
  .service-item i.fas {
    grid-area: icon;
    font-size: 42px;
    color: var(--primary-color);
    padding-top: 6px;
  }
  
  .service-item .service-title {
    grid-area: title;
    color: var(--text-color-darker);
    font-size: 24px;
  }
  
  .service-item .service-content {
    grid-area: 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;
    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 rgba(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: 18px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color-dark);
  }
  
  .team-member .position {
    color: var(--text-color-dark-gray);
    margin-top: 20px;
    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;
  }
  
  .social-links li a {
    color: var(--text-color-dark);
    text-decoration: none;
  }
  
  .team-member:hover {
    transform: translateY(-20px) scale(1.05);
    box-shadow: 0px 0px 36px rgba(0, 0, 0, 0.1);
  }
  
  /* 数据部分 */
  .data-section {
    max-width: unset;
    width: 100vw;
    height: 255px;
    background-image: url(./images/adult-business-computer-contemporary-380769.jpg);
    background-size: cover;
    background-position: center;
    display: grid;
    grid-template-columns: repeat(4, minmax(auto, 220px));
    justify-content: center;
    align-items: center;
    /* 子元素绝对定位时需要有相对的父级元素 */
    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: 250px;
    display: grid;
    grid-template-rows: repeat(3, 1fr);
    justify-items: center;
    color: white;
    position: relative;
    z-index: 40;
  }
  
  .data-piece i.fas {
    font-size: 44px;
  }
  
  .data-piece .num {
    margin-top: 7px;
    font-size: 41px;
    font-weight: 600;
  }
  
  .data-piece .data-desc {
    font-size: 18px;
    font-weight: 500;
  }
  
  /* 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: translateY(-20px) scale(1.05);
    box-shadow: 0px 0px 36px rgba(0, 0, 0, 0.1);
  }
  
  /* 底部信息 */
  footer {
    margin-top: 124px;
    background-color: #181818;
    display: grid;
    justify-items: center;
    padding-top: 72px;
    padding-bottom: 24px;
  }
  
  .footer-menus {
    width: 100%;
    max-width: 1280px;
    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;
  }
  
  .scroll-to-top {
    display: none;
    position: relative;
    z-index: 300;
  }
  .scroll-to-top 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;
      position: relative;
      width: 20px;
      height: 6px;
      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 > * {
      font-size: 18px;
      margin: 4px 0;
      opacity: 0;
      color: var(--text-color-darker);
      animation: showMenu 0.5s linear forwards 0.4s;
    }
  
    header.opem 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);
      transform: 0.4s ease;
    }
  
    header.open .burger-line1 {
      transform: rotate(45deg) translate(3px, 5px);
    }
  
    header.open .burger-line2 {
      transform: translateX(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;
      column-gap: 6vw;
    }
  
    .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);
      row-gap: 24px;
  
    }
  
    .contact-us {
      grid-row: 1 / 3;
    }
  
    .footer-menus {
      text-align: right;
    }
  
    .activities {
      grid-template-columns: 1fr;
  
      row-gap: 36px;
    }
  
    .data-section{
      grid-template-columns: 1fr;
      background-size: 300%;
    }
  
    .team-members {
      grid-template-columns: minmax(200, 400);
    }
  
    .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;
    }
  
    .footer-menus{
      justify-self: start;
      text-align: left;
    }
  }