.first{
    background-color: #002a64;
    height: 560px;
    color: #ffffff;
}
.second{
    background-color: #ffffff;
    height: 560px;
}
.third{
    background-color: #f1eee8;
    height: 560px;
}
.first h2{
    text-align: center;
    font-size: 48px;
    font-weight: bold;
    margin-top: 100px;
}
.first h3{
    text-align: center;
    font-size: 36px;
    line-height: 2;
}
.first p{
    width: fit-content;
    margin: 50px auto 0;
    font-size: 20px;
    line-height: 1.7;
}
.second .tit{
    width: 93%;
    margin: 0 auto;
}
.second .tit h2{
    font-size: 36px;
    font-weight: bold;
    color: #000000;
    text-align: center;
    line-height: 4;
}
.flex-b{
    display: flex;
    justify-content: space-between;
    width: 100%;
}
.flex-b h3{
    font-size: 24px;
    color: #002a64;
    line-height: 2;
    font-weight: bold;
}
.flex-b p{
    font-size: 20px;
    color: #666666;
    line-height: 1.2;
    margin-bottom: 18px;
}
.left{
    width: 25%;
}
.right{
    text-align: right;
    width: 25%;
}
.flex-b img{
    display: block;
    width: 45%;
}
.third .tit2{
    width: 93%;
    margin: 0 auto;
} 
.third .tit2 h2{
    font-size: 36px;
    font-weight: bold;
    color: #000000;
    text-align: center;
    line-height: 5;
}
.flex-b2{
    display: flex;
    justify-content: space-between;
    width: 75%;
    margin: 0 auto;
    height: 324px;
}
.left2{
    width: 25%;
}
.right2{
    width: 25%;
}
.flex-b2 img{
    display: block;
    width: 47%;
}
.flex-b2 span{
    font-weight: bold;
    color: #002a64;
    font-size: 24px;
    display: block;
    text-align: center;
    transform: translateY(26%);
}
.flex-b2 .up{
    width: 100px;
    height: 100px;
    background-color: #ffffff;
    border-radius: 50%;
    margin: 0 auto;
}
.flex-b2 .down{
    width: 100px;
    height: 100px;
    background-color: #ffffff;
    border-radius: 50%;
    margin: 123px auto 0;
}