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

img {
	width: 100%;
}

.img-imgs{
	width: 23%;
	}
	

:root {
  --primary-color: #204596;
  --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, 0.7);
}

/* 栅格布局 */
header {
	width: 100vw;
	height: 80px;
	display: grid;
	padding: 0 40px;
  
	grid-template-columns: 1fr 2fr;
	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;
}

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;
}

/* 标题位置 */
.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 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: 0.1;
}

.explore-btn {
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;
    border-radius:50px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;
    outline: none;
  }
  
  /* 内容区域通用样式 */
.content-wrapper{
	  display: flex;
	  align-items: center;
	  justify-content: center;
	  flex-direction: column;
  }
  
section {
	  display: grid;
	  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(15%);
  }

.intro {
	margin: 28px 0 60px 0;
	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: repeat(2,126px);
  	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-conten {
	grid-area: content;
	color: var(--text-color-gray);
	margin-top: 8px;
}

/* 应用场景 */
.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;
}

/* 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: #f0f0f0;
  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:#8a8a8a;
  font-weight: 500;
  margin-bottom: 20px;
}

.contact-us {
  justify-self: start;
  color: #8a8a8a;
}

.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: #8a8a8a;
}

.icp-info {
  margin-top: 24px;
  margin-bottom: 16px;
}

.icp-info,
.rights {
  grid-column: 1 / -1;
  justify-self: center;
  color: #8a8a8a;
}

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

  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;
    }
  }