コピペOK！はてなブログにヨメレバを導入して、一瞬でおしゃれにする方法。

/*カエレバ・ヨメレバ（PC版）*/
.kaerebalink-box, .booklink-box {
    border: 2px solid #CCCCCC;
    padding: 20px;
    width: 100%;
    max-width:680px;
    margin:0 auto;
    box-sizing: border-box;
}
.kaerebalink-image, .booklink-image {
    width:20%;
    float: left;
}
.kaerebalink-image a img,.booklink-image a img {
    width:100%;
}
.kaerebalink-info, .booklink-info {
    width:70%;
    margin-left: 2em !important;
    float: left;
}
.kaerebalink-name > a, .booklink-name > a {
    font-size: 16px;
    color: #256CC5;
    text-decoration: underline;
}
.kaerebalink-powered-date, .booklink-powered-date {
    font-size: 12px;
}
.kaerebalink-powered-date a, .booklink-powered-date a {
    color: #256CC5;
    text-decoration: underline;
}
.kaerebalink-link1, .booklink-link2 {
    margin-top: 1em;
}
.kaerebalink-link1 div, .booklink-link2 div {
    margin-right: 5px;
    margin-bottom:3px;
    text-align: center;
    float:left;
    width: 45%;
}
.kaerebalink-link1 div:active, .booklink-link2 div:active {
    border-top:3px solid #FFFFFF;
    margin-bottom: none;
    box-shadow:none;
}
.kaerebalink-link1 div a, .booklink-link2 div a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    display:block;
    width: 100%;
    height: 40px;
    line-height: 40px;
}
.shoplinkamazon {
    background: #FF9900;
    box-shadow: 0 3px #B16A00;
}
.shoplinkamazon:hover {
    background: #FFB23F;
}
.shoplinkkindle {
    background: #0079BA;
    box-shadow: 0 3px #015684;
}
.shoplinkkindle:hover {
    background: #2797D4;
}
.shoplinkrakuten {
    background: #BF0000;
    box-shadow: 0 3px #7B0101;
}
.shoplinkrakuten:hover {
    background: #DC3939;
}
.shoplinkkakakucom {
    background: #25388E;
    box-shadow: 0 3px #081658;
}
.shoplinkkakakucom:hover {
    background: #485CB7;
}
.shoplinkyahoo {
    background: #750992;
    box-shadow: 0 3px #3F0250;
}
.shoplinkyahoo:hover {
    background: #8F0FB3;
}
.booklink-footer {
    height:0;
    clear: left;
}
.booklink-link2 {
    margin-top: 0.3em !important;
}

SP版

<style type=text/css>
/*カエレバ・ヨメレバ（スマホ版）*/
.kaerebalink-box, .booklink-box {
    border: 2px solid #CCCCCC;
    padding: 20px;
    width: 80%;
    margin:0 auto;
}
.kaerebalink-image, .booklink-image {
    margin:0 auto;
    text-align:center;
}
.kaerebalink-info, .booklink-info {
    margin:10px auto;
    padding-top:10px;
    border-top:1px solid #CCCCCC;
}
.kaerebalink-name > a, .booklink-name > a {
    font-size: 16px;
    color: #256CC5;
    text-decoration: underline;
}
.kaerebalink-powered-date, .booklink-powered-date {
    font-size: 12px;
}
.kaerebalink-powered-date a, .booklink-powered-date a {
    color: #256CC5;
    text-decoration: underline;
}
.kaerebalink-link1, .booklink-link2 {
    margin-top: 1em;
}
.kaerebalink-link1 div, .booklink-link2 div {
    margin:5px auto;
    text-align: center;
    width: 100%;
}
.kaerebalink-link1 div a, .booklink-link2 div a {
    color: #FFFFFF;
    text-decoration: none;
    font-weight: bold;
    display:block;
    width: 100%;
    height: 40px;
    line-height: 40px;
}
.shoplinkamazon {
    background: #FF9900;
}
.shoplinkkindle {
    background: #0079BA;
}
.shoplinkrakuten {
    background: #BF0000;
}
.shoplinkkakakucom {
    background: #25388E;
}
.shoplinkyahoo {
    background: #750992;
}
.booklink-footer {
    height:0;
    clear: left;
}
</style>