.context_ridetech {
    border: 1px solid #999999;
    background-color: #FFFFFF;
    padding: 10px;
    margin-bottom: 20px;
    width: 860px;
}

.context_ridetech:after {
    content: "";
    display: block;
    clear: both;
    height: 1px;
    overflow: hidden;
}

.heading_ridetech {
    font-family: "ＭＳ Ｐゴシック", Osaka, "ヒラギノ角ゴ Pro W3";
    font-size: 13px;
    font-weight: bold;
    color: #FFFFFF;
    margin-bottom: 10px;
    padding: 6px 5px 4px 15px;
    background-image: url(https://www.bikebros.co.jp/ridetech/img/common/topmidashi_big.gif);
    background-repeat: no-repeat;
    height: 20px;
    border-right-width: 1px;
    clear: both;
}

.box658 {
    width: 658px;
    clear: both;
    margin-bottom: 10px;
}

.box658 p {
    font-size: 12px;
    line-height: 140%;
    margin-bottom: 5px;
}

.box658:after {
    content: "";
    display: block;
    clear: both;
    height: 1px;
    overflow: hidden;
}

.box658_3a {
    float: left;
    width: 45%;
    margin-right: 5%;
}

.box658_3b {
    float: left;
    width: 45%;
}

.lesson {
    font-size: 13px;
    font-weight: normal;
    color: #666666;
    display: block;
    margin-left: 110px;
}

.lesson_name {
    font-size: 12px;
    line-height: 130%;
    margin-left: 110px;
    margin-top: 3px;
}

.lesson_date {
    font-size: 10px;
    color: #666666;
    text-align: right;
    margin-top: 3px;
}

.profile_box {
    width: 658px;
    background-color: #FFFFFF;
    border: 1px solid #CCCCCC;
    padding: 10px;
    margin-bottom: 15px;
    overflow: hidden;
}

.profile_img {
    float: left;
    width: 180px;
    margin-right: 15px;
}

.profile_text {
    float: left;
    width: 450px;
}

.profile_text p {
    font-size: 12px;
    line-height: 150%;
    margin-bottom: 10px;
}

.profile_text a {
    color: #0066CC;
    text-decoration: underline;
}

.profile_title {
    font-size: 14px;
    color: #333333;
    margin-bottom: 10px;
}

.profile_name{
    color:#000000;
    font-weight:bold;
    margin-bottom:10px;
    font-size:14px;
}

.ralign5 {
    text-align: right;
    margin-right: 5px;
}

.img_right5 {
    margin-right: 5px;
    vertical-align: middle;
}

.clear {
    clear: both;
    height: 0;
    line-height: 0;
    font-size: 0;
}

.context2 {
    width: 900px;
    margin: 0 auto;
}

.bottom10 img {
    width: 100%;
    height: auto;
}