@charset "utf=8";
.container {
    max-width: 980px;
    padding: 0 20px;
    margin-left: auto;
    margin-right: auto;
}
.header {
    height: 60px;
    width: 100%;
    background-color: white;
    opacity: 0.9;
    position: fixed;
    top: 0;
}
.header-right {
    float: right;
    margin-top: 20px;
    margin-right: 30px;
}
.header-right a:hover {
    opacity: 0.7;
    transition: background-color 0.5s;
}
.clear {
     clear: both;
}
.i-sakuragama {
    width: 23px;
}
.main {
    padding: 80px 0;
    color: #5a5c5f;
    text-align: center;
}
.ex-text1 {
    font-size: 0.9em;
}
.wrapper-sakuragamaten25 {
    padding: 20px 20px 20px;
    margin-left: auto;
    margin-right: auto;
    display: grid;
    grid-template-columns: 850px;
    grid-template-rows: 350px 530px 200px 300px;
    justify-content: center;
    align-items:center;
}
.item-ex1 {
    grid-row: 1;
    grid-column: 1;
    padding: 10px;
}
.item-ex2 {
    grid-row: 2;
    grid-column: 1;
}
.item-ex3 {
    grid-row: 3;
    grid-column: 1;
    margin: 10px 10px;
}
.item-ex4 {
    grid-row: 4;
    grid-column: 1;
    margin: 10px 10px;
}
.ex-image-t {
    width: 85%;
}
.ex-image {
    width: 90%;
}
.ex-image1 {
    width: 40%;
}
.ex-image7 {
    width: 35%;
}
.back {
    height: 150px;
    margin-top: 100px;    
}
.wrapper {
    text-align: center;
}
.back-btn{
    background: none;
    border: none;
    display: inline-block;
    width: 60px;
    height: 35px;
    font-size: 0.8rem;
    background-color: transparent;
    color: #5a5c5f;
    transition-property: background-color, color;
    transition-duration: .4s;
}
.back-btn:hover{
    background-color: gainsboro;
    color: #fff;
}