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

        a {
            text-decoration: none;
        }

        ul {
            list-style: none;
            color: inherit;
        }

	.continer{
		
	}
	.top_menu{
		display: flex;
		margin:30px 0 30px 0 ;
	}
	.top_menu > a{
		margin-left: 100px;
		font-size: 25px;
		font-weight: bold;
		color: black;
	}
	.menu{
		display: flex;
	}
	.menu > li{
		margin-left: 50px;
		margin-top:5px;
		font-size: 20px;
	}
	.menu > li > a{
		color: black;
		margin-left:40px;
	}
	.BI{
		background-image: url("../img/2148899494.jpg");
		background-position:center;
		background-size:cover;
		position:relative;
		height: 600px;
		width: auto;
	}
	.BI::before{
		position:absolute;
		content: "";
		top:0px;
		left:0px;
		width:100%;
		height:100%;
		background-color:rgba(0, 0, 0, 0.4);
	}
	.BI > h2{
		font-size:60px;
		color:white;
		padding-top:70px;
		padding-left:150px;
		position:relative;
		z-index: 100;
	}
	.BI > p{
		color:white;
		font-size:20px;
		position: relative;
		z-index: 100;
		padding-top:50px;
		padding-left:150px;
	}
    .ES{
		float: left;
		margin-left:200px;
		margin-top:100px;
	}
	.down-menu{
		margin-top:100px;
		width:90%;
		max-width:700px;
		margin-left:auto;
		margin-right:0;
	}
	.Service{
		width: 600px;
		height: 30px;
	}
	.a > input{
		width: 600px;
		height: 30px;
	}
	.b > input{
		width: 600px;
		height: 30px;
	}
	 .aa{
		height:30px;
	}
	.bb{
		width: 600px;
		height: 30px;
	}
	.cc{
		width: 600px;
		height: 30px;
	}
	.e > input{
		width: 600px;
		height: 30px;
	}
	.f > button{
		width: 200px;
		height: 40px;
		margin-top:30px;
		margin-left: 200px;
	}
    .line{
		margin-top: 50px;
	}
	.ff{
		display:flex;
		margin-bottom: 10px;
	}
	.ff > h2{
		margin-left: 40px;
	}
	.link{
		display:flex;
		margin-left:40px;
		margin-top:5px;
	}
	.link > a{
		color: black;
		margin-left:5px;
	}
		/* ¸ð¹ÙÀÏ Àü¿ë ½ºÅ¸ÀÏ - È­¸é ³Êºñ°¡ 768px ÀÌÇÏÀÏ ¶§¸¸ Àû¿ë */
@media (max-width: 768px) {
    .top_menu {
        flex-direction: column;
        align-items: flex-start;
        margin: 20px 0;
        /* display: flex;  => »©¼­ ÀÚ¿¬½º·¯¿î ºí·Ï ·¹À̾ƿôÀ¸·Î */
    }

    .top_menu > a {
        margin-left: 0;
        font-size: 20px;
        font-weight: bold;
        color: black;
        margin-bottom: 10px;
    }

    .menu {
        flex-direction: column;
        width: 100%;
        padding-left: 0;
        /* display: flex; => »©±â */
    }

    .menu > li {
        margin-left: 0;
        margin-top: 10px;
        font-size: 18px;
    }

    .menu > li > a {
        color: black;
        margin-left: 0;
    }

    .BI {
        background-image: url("../img/2148899494.jpg");
        background-position: center;
        background-size: cover;
        position: relative;
        height: 300px;
        width: 100%;
        padding-left: 20px;
    }

    .BI::before {
        position: absolute;
        content: "";
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.4);
    }

    .BI > h2 {
        font-size: 30px;
        color: white;
        padding-top: 40px;
        padding-left: 20px;
        position: relative;
        z-index: 100;
    }

    .BI > p {
        color: white;
        font-size: 16px;
        padding-top: 20px;
        padding-left: 20px;
        position: relative;
        z-index: 100;
    }

    .ES {
        margin-left: 20px;
        margin-top: 50px;
    }

    .down-menu {
        width: 95%;
        max-width: none;
        margin-left: 20px;
        margin-right: 20px;
    }

    .Service,
    .a > input,
    .b > input,
    .bb,
    .cc,
    .e > input {
        width: 100%;
        max-width: none;
        height: 30px;
    }

    .aa {
        height: 30px;
    }

   .f > button {
        width: 100%;
        max-width: 300px;
        margin-left: 30;
    }

    .line {
        margin-top: 30px;
    }

   .footer .ff {
        flex-direction: column;
        align-items: flex-start;
        margin-left: 20px;
    }
    .footer .link {
        margin-left: 0;
        margin-top: 10px;
    }

}