.carousel .item {
  height: 400px;
}

.item {
  background-repeat: no-repeat;
  background-size: cover;
  background-position:center ;
}

.item1 {
  background-image: url(../img/we-used/w3school.jpg);
}

.item2 {
  background-image: url(../img/we-used/muke.jpg);
}

.item3 {
  background-image: url(../img/we-used/github.jpg);
}

/* 轮播图指示器样式 */
.carousel-indicators {
  bottom: 20px;
  z-index: 15;
}

.carousel-indicators li {
  background-color: rgba(255, 255, 255, 0.3);
  border: 2px solid #fff;
  width: 12px;
  height: 12px;
  margin: 0 5px;
  border-radius: 50%;
  transition: all 0.3s ease;
  cursor: pointer;
}

.carousel-indicators li:hover {
  background-color: #ff4444;
  border-color: #ff4444;
  transform: scale(1.2);
}

.carousel-indicators .active {
  background-color: #ff0000 !important;
  border-color: #ff0000 !important;
  transform: scale(1.3);
}

/* 轮播图鼠标悬浮滑动效果 */
.carousel {
  position: relative;
  overflow: hidden;
}

.carousel-inner {
  transition: transform 0.6s ease-in-out;
}

.carousel:hover .carousel-inner {
  cursor: grab;
}

.carousel:active .carousel-inner {
  cursor: grabbing;
}

.txt {
  text-align: left;
  position: absolute;;;
  bottom: 40px;
}

.txt p{
  width: 260px;
  font-size: 15px;
}

.container h1 {
  text-align: left;
  margin-left: 20px;
}

.hr1 {
  border:0;
  background-color:#a2a2a2;
  height:1px;
}

.row a {
  color: #fff;
}

.box-bottom {
  font-size: 30px;
  box-shadow: 5px 5px 5px rgb(140, 160, 180);
  width: 90%;
  position: relative;
  margin-left: 5%;
  overflow: hidden;
  margin-top: 25px;
  margin-bottom: 25px;
}

.box-bottom img {
  width:100%;
}

.img-top {
  width: 100%;
  position: absolute;
  top: 0;
  overflow: hidden;
}

.box-bottom p {
  position: relative;
  top: -60px;
  font-size: 15px;
  width: 100%;
  color: #fff;
  background-color: rgba(0,0,0,0.6);
  opacity: 0;
  transition-duration: 0.4s;
}

.btn-work h4{
  display: inline-block;
}

.btn-work a {
  display: inline-block;
  float: right;
  margin-right: 20px;
}

#box1:hover #box1-p {
  top:0;
  opacity: 1;
}

#box2:hover #box2-p {
  top:0;
  opacity: 1;
}

#box3:hover #box3-p {
  top:0;
  opacity: 1;
}

#box4:hover #box4-p {
  top:0;
  opacity: 1;
}

#box5:hover #box5-p {
  top:0;
  opacity: 1;
}

#box6:hover #box6-p {
  top:0;
  opacity: 1;
}

#box7:hover #box7-p {
  top:0;
  opacity: 1;
}


.video{
  box-sizing: border-box;
  position: absolute;
  left: 16px;
  padding: 95px;
  top: 10px;
}

.video img:hover{
  animation:rotate 0.3s;
}
@keyframes rotate {
  50%{transform: rotate(30deg);}
  100%{transform: rotate(-30deg);}
}


.about-us {
  text-align: center;
  height: auto;
}

.btn-l {
  width: 70%;
  color: #ffffff;
  text-decoration: none;
  background-color: #0082ec;
  font-size: 15px;
  box-shadow: 0px 5px 8px #055ca3;
  margin: 20px auto;
}