* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #222327;
}

.nav {
    width: 400px;
    height: 70px;
    padding: 0 25px;
    border-radius: 10px;
    background-color: #fff;
    position: relative;
    display: flex;
}

.nav li {
    width: 70px;
    height: 70px;
    z-index: 1;
    position: relative;
    list-style: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.nav li i {
    position: relative;
    display: block;
    height: 70px;
    line-height: 70px;
    font-size: 24px;
    text-align: center;
    transition: all 0.5s;
}

.nav li span {
    position: absolute;
    font-size: 12px;
    letter-spacing: 2px;
    transition: all .5s;
    opacity: 0;
    transform: translateY(20px);
}

.nav li.active i {
    transform: translateY(-35px);
    color: #fff;
}

.nav li.active span {
    opacity: 1;
    transform: translateY(10px);
}

.indicator {
    position: absolute;
    top: -50%;
    width: 70px;
    height: 70px;
    background: #2196f3;
    border-radius: 50%;
    border: 6px solid #222327;
    transition: all .5s;
}

.indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -22px;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-top-right-radius: 20px;
    box-shadow: 1px -10px 0 0 #222327;
}

.indicator::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -22px;
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-top-left-radius: 20px;
    box-shadow: -1px -10px 0 0 #222327;
}

li:nth-child(1).active~.indicator {
    transform: translateX(calc(70px * 0));
}

li:nth-child(2).active~.indicator {
    transform: translateX(calc(70px * 1));
}

li:nth-child(3).active~.indicator {
    transform: translateX(calc(70px * 2));
}

li:nth-child(4).active~.indicator {
    transform: translateX(calc(70px * 3));
}

li:nth-child(5).active~.indicator {
    transform: translateX(calc(70px * 4));
}

@font-face {
  font-family: "iconfont"; /* Project id 4144272 */
  src: url('//at.alicdn.com/t/c/font_4144272_3vtq4renm6e.woff2?t=1688023538350') format('woff2'),
       url('//at.alicdn.com/t/c/font_4144272_3vtq4renm6e.woff?t=1688023538350') format('woff'),
       url('//at.alicdn.com/t/c/font_4144272_3vtq4renm6e.ttf?t=1688023538350') format('truetype');
}

.iconfont {
  font-family: "iconfont" !important;
  font-size: 16px;
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-envelope:before {
  content: "\e6ce";
}

.icon-comment:before {
  content: "\e6a7";
}

.icon-user:before {
  content: "\e60a";
}

.icon-heart:before {
  content: "\e61e";
}

.icon-home:before {
  content: "\e62f";
}