.cf::after {
    content: "";
    display: block;
    clear: both;
}
html {
    font-family: "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", 'メイリオ', sans-serif;
    font-size: 15px;
    line-height: 1.5;
}
header {
    border-top: 3px solid #2454A5;
    padding-top: 18px;
    padding-bottom: 18px;
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #fff;;
    z-index: 1;
    border-bottom: 1px solid #e8e8e8;
}
.headLogo {
    width: 1160px;
    margin-left: auto;
    margin-right: auto;
}
.headLogo a img {
    transition: opacity 0.3s;
}
.headLogo a img:first-child {
    display: none;
}
main {
    width: 1160px;
    margin-left: auto;
    margin-right: auto;
    padding-top: 150px; /* headerの高さ+65px */
    padding-bottom: 143px; /* footerの高さ+100px */
}
.mainTit {
    font-weight: bold;
    margin-bottom: 50px;
    font-size: 174%;
    padding-bottom: 20px;
    border-bottom: 1px solid #ddd;
}
.mainTit div {
    float: left;
    background-color: #2454A5;
    width: 5px;
    height: 0.8em;
    margin-top: 0.3em;
    margin-right: 13px;
}
footer {
    background-color: #002f4d;
    padding-top: 10px;
    padding-bottom: 10px;
    position: fixed;
    bottom: 0;
    width: 100%;
}
.footCopy {
    width: 1160px;
    color: #608aa5;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

@media (any-hover: hover) {

    /* スマホではhoverの反応が1回分遅れるので、スマホ以外のみ有効化 */
    .headLogo a:hover img {
        opacity: 0.5;
    }
}

@media screen and (max-width: 1180px) {
    .headLogo {
        width: 100%;
        padding-left: 10px;
        padding-right: 10px;
    }
    main {
        width: 100%;
        padding-left: 10px;
        padding-right: 10px;
    }
    .footCopy {
        width: 100%;
        padding-left: 10px;
        padding-right: 10px;
    }
}

@media screen and (max-width: 768px) {
    html {
        font-size: 16px; /* フォームの文字サイズが16px未満だとiOSが画面を拡大してしまうため */
    }
    header {
        padding-top: 21px;
        padding-bottom: 21px;
    }
    .headLogo a img:first-child {
        display: block;
    }
    .headLogo a img:last-child {
        display: none;
    }
}