.osa{
    text-decoration: none;
     text-decoration-color:#ffffff;
    }
    
    h2{
      font-size: 30px;
    }

.seikatu{
  margin-left: 20%;
         margin-right: 20%;
}

    
    h3{
         padding: 10px;             
        font-size: 24px;
         font-family: "Zen Kaku Gothic Antique", sans-serif;
         margin-left: 20%;
         margin-right: 20%;
    }
    
    p{
         font-family: "Zen Kaku Gothic Antique", sans-serif;
         font-size:20px;
       margin-left:20%;
       margin-right: 20%;
    }
    
    ul {
      list-style: none;
      font-family: "Zen Kaku Gothic Antique", sans-serif;
      font-size:20px;
      margin-left:20%;
      margin-right: 20%;
    }
    
    .under {
      background: linear-gradient(transparent 50%, #fcfc38 50%);
    }
    
    .heading-21 {
        position: relative;
        padding: .5em .7em .10em;
        border-bottom: 3px solid #d02525;
        color: #333333;
        font-family: "Zen Kaku Gothic Antique", sans-serif;
        margin-left:15%;
        margin-right: 15%;
    }
    
    .heading-21::before, 
    .heading-21::after {
        position: absolute;
        left: 30px;
        bottom: -15px;
        width: 30px;
        height: 15px;
        clip-path: polygon(0 0, 100% 0, 50% 100%);
        content: '';
    }
    
    .heading-21::before {
        background-color: #d02525;
    }
    
    .heading-21::after {
        bottom: -11px;
    }
    
    ao{
      font-size: 21px;
      font-weight: bold
    }
    
    .box27 {
      position: relative;
      margin: 4em 0;
      padding: 5em 1em;
      border: solid 3px #c41a1a;
      margin-left:20%;
      margin-right: 35%;
    }
    .box27 .box-title {
      position: absolute;
      display: inline-block;
      top: -27px;
      left: -3px;
      padding: 0 9px;
      height: 25px;
      line-height: 30px;
      font-size: 20px;
      background: #c41a1a;
      color: #ffffff;
      font-weight: bold;
      border-radius: 5px 5px 0 0;
      margin-left:5%;
       margin-right: 5%;
    }
    .box27 p {
      margin: 0; 
      padding: 0;
      margin-left:5%;
       margin-right: 5%;
    }
    
    /* 018 */
    .button018 a {
        position: relative;
        display: flex;
        justify-content: space-around;
        align-items: center;
        margin: 0 auto;
        max-width: 225px;
        padding: 10px 0px 10px 25px;
        color: #050000;
        transition: 0.3s ease-in-out;
        font-weight: 500;
        text-decoration: none;
        font-family: "Zen Kaku Gothic Antique", sans-serif;
    }
    
    .button018 a:before, .button018 a:after {
      content: "";
      position: absolute;
      display: block;
      top: 50%;
    }
    .button018 a:before {
      width: 0.5rem;
      height: 0.5rem;
      left: 1.1rem;
      border-top: solid 2px #fff;
      border-right: solid 2px #fff;
      z-index: 2;
      transform: translateY(-50%) rotate(45deg);
      transition: all 0.3s;
    }
    .button018 a:after {
      left: 0;
      background: #c41a1a;
      z-index: 1;
      width: 3rem;
      height: 3rem;
      border-radius: 4rem;
      transform: translateY(-50%);
      transition: all 0.5s;
    }
    .button018 a span {
      position: relative;
      transition: all 0.3s;
      z-index: 3;
    }
    
    .button018 a:hover span {
      color: #fff;
    }
    .button018 a:hover:before {
      left: 2rem;
    }
    .button018 a:hover:after {
      right: 0;
      width: 100%;
    }
    
    
    nav{
        background:#c41a1a;
        color:#fff;
        text-align: center;
    }
    /*ナビゲーションを横並びに*/
    nav ul{
        list-style: none;
        display: flex;
        justify-content: center;
    }
    /*2階層目以降は横並びにしない*/
    nav ul ul{
        display: block;
    }
    
    /*下の階層のulや矢印の基点にするためliにrelativeを指定*/
    nav ul li{
        position: relative;
    }
    
    /*ナビゲーションのリンク設定*/
    nav ul li a{
        display: block;
        text-decoration: none;
        color: #fff;
        padding:20px 35px;
        transition:all .3s;
    }
    
    nav ul li li a{
        padding:10px 35px;
    }
    
    nav ul li a:hover{
        color:#fff;	
    }
    
    /*==矢印の設定*/
    
    /*2階層目を持つliの矢印の設定*/
    nav ul li.has-child::before{
        content:'';
        position: absolute;
        left:15px;
        top:25px;
        width:6px;
        height:6px;
        border-top: 2px solid #fff;
        border-right:2px solid #fff;
        transform: rotate(135deg);
    }
    
    /*3階層目を持つliの矢印の設定*/
    nav ul ul li.has-child::before{
        content:'';
        position: absolute;
        left:6px;
        top:17px;
        width:6px;
        height:6px;
        border-top: 2px solid #fff;
        border-right:2px solid #fff;
        transform: rotate(45deg);
    }
    
    /*== 2・3階層目の共通設定 */
    
    /*下の階層を持っているulの指定*/
    nav li.has-child ul{
        /*絶対配置で位置を指定*/
        position: absolute;
        left:0;
        top:62px;
        z-index: 4;
        /*形状を指定*/
        background:#c41a1a;
        width:180px;
        /*はじめは非表示*/
        visibility: hidden;
        opacity: 0;
        /*アニメーション設定*/
        transition: all .3s;
    }
    
    /*hoverしたら表示*/
    nav li.has-child:hover > ul,
    nav li.has-child ul li:hover > ul,
    nav li.has-child:active > ul,
    nav li.has-child ul li:active > ul{
      visibility: visible;
      opacity: 1;
    }
    
    /*ナビゲーションaタグの形状*/
    nav li.has-child ul li a{
        color: #fff;
        border-bottom:solid 1px rgba(255,255,255);
    }
    
    nav li.has-child ul li:last-child > a{
     border-bottom:none;
     }
    
    nav li.has-child ul li a:hover,
    nav li.has-child ul li a:active{
        background:#edce66;
    }
    
    nav li.has-child ul ul{
        top:0;
        left:182px;
        background:#edce66;
    }
    
    nav li.has-child ul ul li a:hover,
    nav li.has-child ul ul li a:active{
        background:#edce66;
    }
    
    
    /*==768px以下の形状*/
    
    @media screen and (max-width:768px){
        nav{
            padding: 0;
        }
        
        nav ul{
            display: block;
        }
        
        nav li.has-child ul,
        nav li.has-child ul ul{
          position: relative;
        left:0;
        top:0;
        width:100%;
        visibility:visible;
        opacity:1;
        display: none;
        transition:none;
    }
        
    nav ul li a{
        border-bottom:1px solid #fff;
    }
    
    nav ul li.has-child::before{
        left:20px;	
    }
    
    nav ul ul li.has-child::before{
        transform: rotate(135deg);
        left:20px;
    }
        
    nav ul li.has-child.active::before{
        transform: rotate(-45deg);
    }
    
    html {
      scroll-behavior: smooth;
    }
      
    .text-box {
      width: 300px;
      margin: 0 auto;
      padding: 0 1em;
      }
    }