html {
    font-size: 62.5%; /* 10 (base font size) */
}

body, div, ol, ul, li,
h1, h2, h2, h3, h4, h5, h6, form,
input, textarea, p, th, td{
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", Verdana, Meiryo, "M+ 1p", sans-serif;
    line-height: 1.5;
}

#container {
    max-width: 1040px;
    overflow-x: hidden;
    margin: 0 auto;
    border: 1px solid #ccc;
}

img{
    border:none;
}

li{
    list-style-type:none;
}

a:visited {
    color: darkviolet;
}

/* ヘッダー */
header {
    background-color: black;
}

#hlogo {
    vertical-align: top;
    width: 100%;
    line-height: 0;
}

#introduction {
    color: darkgray;
    text-align: center;
    font-size: 1.4rem;
    padding: 0;
}
/* ヘッダー */

/* ビッグバナー */
.adbanner {
    width: 100%;
    height: 90px;
    margin: auto;
    border-top: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
}

/* フッター */
footer {
    background-color: darkslategray;
    color: darkgray;
    text-align: center;
    font-size: 1rem;
    line-height: 3;
    width: 100%;
    height: 3rem;
    border-top: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
}