*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;

}
header{
    width: 100%;
    height: 70px;
    /* position: fixed;
    background-color: ;
    top: 0; */

}
header .logo{
    width: 15%;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
    float: left;
   
}
header .logo img{
    width: 70%;
    height: 40px;
}
header nav{
    width: 70%;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    float: left;
}
header nav ul{
    list-style: none;
    float: left;
    position: relative;
 
}
header nav ul li{
    width: 110px;
    height: 70px;
    float: left;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: end;
    margin-left: 8px;
    position: relative;
    


}
header nav ul li::after{
    content: "";
    position: absolute;
    width: 0px;
    height: 5px;
    transition: .5s;
    
    
}
header nav ul li a{
    color: rgb(22, 22, 22);
    text-decoration: none;
    font-size: 16px;
    
}
header nav ul li:hover::after{
    background-color: green;
    width: 110px;
    border-radius: 20px;
}
header nav ul li ul{
    width: 250px;
    height:0px;
    background-color: rgb(25, 0, 165);
    position: absolute;
    float: left;
    z-index: 222;
    margin-left: 20px;
    display: none;
    transition: all 0.3s;
    
   
}

header nav ul li:hover ul{
    display: block;
}
.btn{
    width: 15%;
    height: 70px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.btn button{
    padding: 15px 35px;
    background-color: rgb(51, 238, 51);
    border-radius: 20px;
    border: 1px solid black;
    position: relative;
    overflow: hidden;
    color: rgb(10, 10, 10);
    z-index: 1;
    transition: .5s;
    
}
.btn button:hover{
    color: rgb(248, 245, 245);
}
.btn button::after{
    content: "";
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50px;
    background-color: rgb(3, 3, 3);
    margin-left: -90px;
    margin-top: 40px;
    transition: .5s ;
    z-index: -1;


}
.btn button:hover::after{
    transform: scale(2.8);
}
.slider{
    width: 100%;
    height:750px;
    background-color: rgb(62, 63, 62);
    margin-top: 50px;
    border-radius: 20px;
    background-image: url(images/slide.png);
    background-size: 100% 100%;
}
.slider .slider-1{
    width:30%;
    height: 100%;
    float: left;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    align-content: center;
    margin-left: 60px;
    text-align: center;

}
.slider .slider-1 h1{
    font-size: 85px;
    color: white;

}
.slider .slider-1 p{
    font-size: 18px;
    color: white;

}

.slider .slider-1 button{
    padding: 15px 35px;
    background-color: rgb(51, 238, 51);
    border-radius: 20px;
    border: none;
    position: relative;
    z-index: 1;
    overflow: hidden;
    color: black;
}
.slider .slider-1 button:hover{
    color: rgb(20, 20, 20);
}
.slider .slider-1 button::after{
    content: "";
    position: absolute;
    width: 100px;
    height: 100px;
    border-radius: 50px;
    background-color: rgb(255, 255, 255);
    margin-left: -90px;
    margin-top: 40px;
    transition: .5s ;
    z-index: -1;
}
.slider .slider-1 button:hover::after{
    transform: scale(2.8);
}
.slider .slider-2{
    width:40%;
    height: 100%;
    float: right;
    margin-right: 30px;


}
.user{
    width: 100%;
    height: 320px;
}
.content{
    width: 100%;
    height: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}.content h1{
    font-size: 52px;
}
.users{
    width: 100%;
    
}
.users img{
    width: 100%;  
}
.video-call{
    width: 100%;
    height: 450px;
    margin-top: 120px;
}
.video-call .content{
    width: 40%;
    justify-content: start;
    text-align: start;
    align-items: start;
    float: left;
    margin-top: 130px;

}
.video-call .content h1{
    font-size: 64px;
}
.video-call .content button{
    padding: 15px 35px;
    border-radius: 20px;
    background-color: rgb(76, 226, 76);
    border: none;
}

.video-call .phone{
    width: 40%;
    float: right;

}
.speak{
    width: 100%;
    height: 850px;
    background-color: #111B21;
}
.speak .speak-picture{
    width: 50%;
    margin-top: 100px;
    margin-left: 50px;
    float: left;
}
.speak .speak-picture img{
    width: 80%;
}
.speak .speak-content {
    width: 40%;
    margin-top: 160px;
    float: left;
   color: white;
}
.speak .speak-content h1{
    font-size: 65px;
}
.speak .speak-content p{
    font-size: 22px;
}
.speak .speak-content button{
    padding: 15px 35px;
    border-radius: 20px;
    background-color: rgb(76, 226, 76);
    border: none;
}
.touch{
    width: 100%;
    height: 550px;
    margin-top: 50px;
}
.touch .touch-content{
    width: 40%;
    height:650px;
    float: left;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: start;
    text-align: start;
}
.touch .touch-content h1{
    font-size: 75px;
}
.touch .touch-content p{
   font-size: 18px;
}
.touch .touch-content button{
    padding: 15px 35px;
    border-radius: 20px;
    background-color: rgb(76, 226, 76);
    border: none;
}
.touch .touch-img{
    width: 50%;
    float: right;
    display: flex;
}
.touch .touch-img img{
    width: 60%;
    height: 650px;
}
.touch .touch-img .img-chat{
    width: 60%;
    height: 350px;
    margin-left: -380px;
    margin-top: 120px;
}
.say{
    width: 100%;
    height: 650px;
    margin-top: 150px;
    float: left;
}
.say .say-img{
    width: 50%;
    height: 650px;
    display: flex;
    float: left;
}
.say .say-img img{
    width: 60%;
    height: 650px;
}
.say .say-img .cartoon{
    width: 50%;
    height: 350px;
    margin-left: -350px;
    margin-top: 150px;
}
.say .say-content{
    width: 40%;
    height: 650px;
    float: left;
    display: flex;
    flex-direction: column;
    align-items: start;
    justify-content: center;

   
}
.say .say-content h1{
    font-size: 65px;
}
.say .say-content p{
    font-size: 22px;
    margin-top: 20px;
}
.say .say-content button{
    padding: 15px 35px;
    border-radius: 20px;
    background-color: rgb(76, 226, 76);
    border: none;
}
.footar{
    width: 100%;
    height: 450px;
    background-color: #111B21;
    float: left;
}
.footar li{
    list-style: none;
    margin-top: 40px;
}
.footar li a{
    text-decoration: none;
    font-size: 22px;
    color: white;
}
.footar li a:hover{
    color: rgb(83, 83, 83);
}