*
{
    line-height: 2rem;
}
html, td, th
{
    font-size: 87.5%;
    font-size: 1.2rem;
}
@media only screen and (min-width: 320px)
{
    html, td, th
    {
        font-size: 87.5% !important;
    }
}
@media only screen and (min-width: 640px)
{
    html, td, th
    {
        font-size: 100% !important;
    }
}
body
{
    margin: 0px;
    padding: 0px;
    color: #0A0A0A;
    background-color: #F6F6F6;
}
#main
{
    max-width: 640px;
    width: 100%;
    background-color: #fff;
    margin: 0 auto;
}
#top
{
    background-color: #F6F6F6;
    padding: 8px 4px 4px 4px;
}
#top a:link, #top a:visited, #top a:hover
{
    text-decoration: none;
    color: #0A0A0A;
}
#dir a:link, #dir a:visited, #dir a:hover
{
    display: block;
    margin: 10px;
    padding: 3px;
    text-decoration: none;
    color: #0A0A0A;
    border-bottom: 1px solid #D8D8D8;
}
#title
{
    font-weight: bold;
    margin: 10px;
    padding: 5px;
    border-bottom: 1px solid #D8D8D8;
    font-size: 1.2rem;
}
#content
{
    padding: 5px;
    margin: 5px;
}
.tip
{
    margin: 5px;
    font-size: 0.875rem;
    color: Red;
}
.imgdiv
{
    text-align: center;
}
.imgdiv img
{
    border: 1px solid #D8D8D8;
    margin: 1px;
    max-width: 80%;
    height: auto;
}
.imgdiv div
{
    text-align: left;
    width: 80%;
    margin: 1px auto;
    font-size: 0.875rem;
}
#btn_to_top
{
    display: none;
    position: fixed;
    bottom: 0.75rem;
    right: 0.75rem;
    z-index: 99;
    border: none;
    outline: none;
    background-color: #D0D0D0;
    color: #000000;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    opacity: 0.7;
    font-size: 0.875rem;
    line-height: 120%;
}
#btn_to_top:hover
{
    background-color: #F0F0F0;
}