/* CSS Document */
@media screen and (max-width: 1520px)  {
         .ocean{
    height:750px;
} 
}
@media only screen and (max-width: 1440px) { 
         .ocean{
    height:650px;
}  
}
@media only screen and (min-width: 1450px) { 
         .ocean{
    background-size: 100% 92%;
}  
}
@media screen and (max-width: 1350px)  {
      .ocean{
    height:650px;
} 
          .nav-text1{
        font-size: 19px;
    }
    }
@media screen and (max-width: 1250px)  { 
     .ocean{
    height:600px;
} 
}
@media screen and (max-width: 1150px)  {
        .ocean{
    height:570px;
} 
  }
@media screen and (max-width: 1070px)  {
       .ocean{
    height:520px;
} 
}
@media screen and (max-width: 990px)  {
       .ocean{
    height:480px;
} 
        .logo img{
    width:150px;
}
    .menu{    
    width: 250px;
    height: 35px;
    padding: 5px;
    font-size: 17px;  
}
    .sing01_btn{
    width: 60%;
    margin: 10px 20% 0;
}
    }
.mt-80 {
    margin-top: 40px;
}
    .mt-sky{
    margin-top: 180px;
}
 .Ctitle {
    margin: 20px auto;
}

  .copyright{
	font-size: 14px;
}
    }
@media screen and (max-width: 950px)  {
     .ocean{
    height:440px;
} 
}
@media screen and (max-width: 910px)  {
     .ocean{
    height:400px;
} 
     }
@media screen and (max-width: 885px)  {
 .copy_block{
        display: block;
    }
}
@media screen and (max-width: 820px)  {
     .ocean{
    height:430px;
} 
}
@media screen and (max-width: 770px)  {
    .bggray{
    background-size: 100% auto;
}
    .notice{
    padding: 30px 20px 10px 10px ;
}
  }
@media screen and (min-width: 767px)  {  
    .B,.C,.ocean_top,.sing01_pic{
        display:block;
    }
    .Bm,.Cm,.ocean_topM,.sing01_picM{
        display:none;
    }    
    }
@media screen and (max-width: 767px)  { 
    .bggray{    
    background: url("img/top_bgM.png") top left no-repeat;
    background-size: 100% auto;
    background-color: #61ae76;
}
    .ocean{
    position: relative;
    width: 100%;     
     background: url("img/top_picM.png") top left no-repeat;
    background-size: 100% auto;
        background-position: center bottom 10% ;
    height:1000px;
}
    .ocean_top{
        display:none;
    }
  .ocean_topM{
      position: absolute;
      display:block;
      width: 70%; 
        margin: 0 15%;
      top: 70px;
    }   
 .A{
    padding: 40px;    
}
    .sing01{
        padding: 20px 60px;
    }  
     .sing02{
         display: inline-block;
        padding: 10px 70px 20px;
    }
    .A.mt-80{
        margin-top: 20px;
    }
    .lifemt-60{
        margin-top: 60px;
    }
    .B,.C,.sing01_pic{
        display:none;
    }
    .Bm,.Cm,.sing01_picM{
        display: block;
    }
    .Cbg{
    background: url("img/sing03_bgM.png") top left  no-repeat; 
    background-size: auto 100%;
    background-position:  center top;
    background-color: #427aad;
}
    .Bbutton{
    width: 48%;
    margin: 30px 26%;
}
    .mt-80{
        margin-top: 50px;
    }
/*
        .mt-4 {
    margin-top: -0.5rem !important;
}
    .mb-C50{
        margin-bottom: 50px;
    }    
    .mt-200{
    margin-top: 150px;
}
    .mb-20{
        margin-bottom: 0px;
    }
*/
}

@media screen and (max-width: 675px)  {
     .ocean{
    height:880px;
}
        .logo img{
    width:160px;
}
    .menu{    
    width: 200px;
    height: 35px;
    padding: 5px;
    font-size: 15px;  
}
      .mt-80{
        margin-top: 40px;
    }
}
@media screen and (max-width: 600px)  {   
  .ocean{   
    height:800px;
}
     .A{
    padding: 20px;    
}
/*
    .Bnote{
        font-size: 16px;
     padding: 10px 0;
    }
*/
}
@media screen and (max-width: 513px)  { 
.ocean{   
    height:700px;
}
     .menu{    
    width: 180px;
    height: 30px;
    padding: 3px;
    font-size: 14px;  
}
}
@media screen and (max-width: 500px)  {  
    .ocean{   
    height:650px;
}
    .sing01{
        padding: 20px 40px;
    }
.Ctitle{
    margin: 60px auto 10px;
}
    .accordion-button::after {
     width: 30px;
    height: 30px;
}
.accordion-button:not(.collapsed)::after {
    width: 30px;
    height: 30px;
}
     #btn_gotop img{
        width: 100px;
    }
    .notice_title{
        font-size: 35px;
    } 
  }
@media screen and (max-width: 450px)  {
   .ocean{   
    height:600px;
}
       .A{
    padding: 10px;    
}
    .notice_title{
        font-size: 32px;
    } 
    .accordion-item:first-of-type .accordion-button {
    border-radius: 30px;
}
.accordion-item:last-of-type .accordion-button.collapsed {
   border-radius: 30px;
     border:3px solid #fff;
}
.accordion-item:last-of-type {
    border-radius: 30px;
}
.accordion-item:first-of-type {
 border-radius: 30px;
}
}
@media screen and (max-width: 400px)  {
    .ocean_topM{
      width: 80%; 
        margin: 0 10%;
      top: 70px;
    } 
 .ocean{   
    height:580px;
}
    .logo img{
        width: 120px;
    }
     .sing01{
        padding: 20px 20px;
    }
/*
    .mt-200 {
    margin-top: 100px;
}    
    .Bnote{
        font-size: 14px;
     padding: 5px 0;
    }
*/
     .notice_title{
        font-size: 28px;
    }
    .accordion-button::after {
     width: 28px;
    height: 28px;
}
.accordion-button:not(.collapsed)::after {
     width: 28px;
    height: 28px;
}
}
@media screen and (max-width: 380px)  { 
     .ocean{   
    height:560px;
}
    .notice_title{
        font-size: 25px;
    } 
}
@media screen and (max-width: 350px)  {
    .ocean{   
    height:520px;
}
        .menu {
        width: 168px;
        height: 30px;
        padding: 3px;
        font-size: 13px;
            border-radius: 10px;
    }
/*
    .mt-50{
        margin-top: 35px;
    }   
*/
.notice_title {
    font-size: 23px;
}
    .triangle-down {
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 16px solid #fff;
    top: -8px;
    margin-left: 8px;
}
/*
    .mt-200 {
    margin-top: 70px;
}
*/
}
@media screen and (max-width: 335px)  {
   .ocean{   
    height:500px;
}
/*
    .mt-date{
    margin-top: 42%;
}
*/
    .notice_title {
    font-size: 20px;
}
}
@media screen and (max-width: 315px)  {
      .ocean{   
    height:480px;
}

     .notice_title {
    font-size: 17px;
}
}
@media screen and (max-width: 285px)  {
          .ocean{   
    height:430px;
}
}