@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}
body{
    overflow-x: hidden;
    /* background: #333232; */
    background: whitesmoke;
}
a{
    text-decoration: none;
}
ul{
    list-style: none;
}

/*nav*/
nav{
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 80px;
    height: 60px;
    width: 100%;
    z-index: 10;
    position: fixed;
}
.n-line{
    position: absolute;
    top: 28px;
    width: 0px;
    border-bottom: 4px salmon solid;
    transition: .3s ease-in-out;
}
.logo{
    color: whitesmoke;
}
.nav_1{
    display: flex;
    align-items: center;
}
.nav_1 li img{
    width: 20px;
    height: 20px;
    margin-right: 5px;
}
.nav_1 li{
    margin-left: 17px;
    display: flex;
    position: relative;
}
.nav_1 li a{
    color: whitesmoke;
    cursor: pointer;
}
.menu{
    display: none;
}
.mark{

    width: 100%;
    height: 60px;
    background-color: rgb(58, 58, 58);
    /* opacity: 0; */
    position: absolute;
    left: 0;
    z-index: 1;
    position: fixed;
    /* box-shadow: 0px 3px 15px rgb(32, 32, 32); */
}

/*header*/
header{
    width: 80%;
    overflow: hidden;
    margin: 0 auto;
    /* background: whitesmoke; */
}
.head{
    width: 50%;
    margin: 0 auto;
    margin-top: 80px;
    /* background: wheat; */
    display: flex;
    align-items: center;
    position: relative;
}
.head img{
    width: 70%;
    display: block;
    border-radius: 10px;
} 
.h-title{
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 35%;
    height: 45%;
    padding: 15px;
    background: white;
    position: absolute;
    right: 0;
    border-radius: 10px;
    box-shadow: 0px 0px 15px rgb(43, 41, 41,0.5);
}
.h-title h1{
    font-size: 3vmin;
    color: rgb(63, 63, 63);
    margin-bottom: 15px;
}
.title-text{
    font-size: 2vmin;
}

/*section*/
section{
    width: 60%;
    /* background: rgb(177, 121, 121); */
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.col-name{
    width: 380px;
    
    /* background: violet; */
    margin-top: 30px;
}
.col-n-con{
    /* background: chartreuse; */
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}
.col-line{
    width: 130px;
    margin-top: 10px;
    border-top: 2px solid black;
}
.col-name h5{
    text-align: center;
    font-weight: 400;
}

.col-content{
    width: 100%;
    padding: 15px;
}
.col-content .img{
    width: 90%;
    
    background: black;
    margin: 15px auto;
}
.col-content .img img{
    width: 100%;
}
.word{
    text-indent:30px;
    margin-bottom: 20px;
}

.col-tag{
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
}
.col-tag h1{
    
}
.col-tag .line{
    width: 70%;
    border-top: 2px solid black;
    margin: 20px 0;
}
.m-tag{
    display: flex;
    align-items: center;
}
.m-tag img{
    width: 25px;
    margin-left: 15px;
}
.col-t-img{
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.col-t-img img{
    width: 15%;
    border-radius: 50%;
}
.col-t-img h1{
    margin: 15px auto;
}
.col-t-img h4{
    font-weight: 450;
    margin-bottom: 50px;
}

footer {
    width: 100vw;
    height: 30vh;
    background-image: url(../img/b-2.png);
    background-position: center;
    background-size: cover;
    position: relative;
   
    z-index: 0;
}
.mark-2::before{
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: #363d59;
    opacity: 0.6;
    z-index: 1;
}
.mark-2{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.mark-2 p{
    color: white;
    font-weight: 400;
    text-align: center;
    line-height: 30px;
    z-index: 10;
}
@media screen and (max-width:1050px){
    /*nav*/
    nav{
        padding: 0 40px;
    }
    .n-line{
        display: none;
    }
    .nav_1{
        position: absolute;
        top: 60px;
        right: 0;
        bottom: 0;
        width: 50vw;
        height: calc(100vh - 80px);
        background-color: rgb(58, 58, 58);
        flex-direction: column;
        z-index: 1;
        transform: translateX(100%);
		transition: 0.4s ease-in-out;
    }
    .open{
        transform: translateX(0);
    }
    .nav_1 li{
        margin: 3vh;
        transform: translateX(20px);
        opacity: 0; /*先设置在@keyframes*/
    }
    .menu{
        display: block;
    }
    @keyframes slideIn {
        form{
            transform: translateX(20px);
            opacity: 0;
        }
        to{
            transform: translateX(0);
            opacity: 1;
        }
    }

    /*header*/
    header{
        width: 90%;
    }
    .head{
        width: 80%;
    }
    .title-text{
        display: none;
    }
    .h-title h1{
        text-align: center;
        margin-bottom: 0;
        letter-spacing: 8px;
    }

    .col-t-img img{
        width: 30%;
    }

    /*section*/
    section{
        width: 90%;
    }
    .col-n-con{
        justify-content: space-around;
    }
    .col-line{
        width: 100px;
    }
}