.content {
    max-width: 1080px;
    margin: 0 auto;
}

.quarterly-intro {
    overflow: hidden;
    margin-bottom: 50px;
}

.quarterly-intro .pic {
    float: left;
    max-width: 300px;
}

.quarterly-intro .txt {
    margin-left: 320px;
    position: relative;
}

.quarterly-intro .title {
    color: #222;
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}

.quarterly-intro .description {
    padding-bottom: 40px;
    box-sizing: border-box;
}

.quarterly-intro .ps {
    position: absolute;
    bottom: 0;
    left: 0;
}

.download-list {
    margin: 0 -10px;
}

.download-list .item {
    width: 20%;
    padding: 0 10px;
}

.download-list .item a {
    margin: 0 auto 50px;
}

.download-list .item .pic {
    border: 3px solid #EBEBEB;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.download-list .item a:hover .pic {
    border: 3px solid #E40011;
}

.download-list .icon-btn {
    border: 1px solid #BEBEBE;
    background: url(../images/quarterly/btn_bg.jpg) repeat-x;
    background-size: auto 100%;
    height: 120px;
    border-radius: 6px;
    color: #84888A;
    font-size: 15px;
    text-align: center;
    padding: 5px;
    box-sizing: border-box;
}

.download-list .icon-btn .icon {
    background-image: url(../images/quarterly/download_ic.png);
    width: 72px;
    height: 72px;
    display: block;
    margin: 5px auto 0;
}

.download-list a:hover .icon-btn .icon {
    background-position: 0 100%;
}

.download-list .name {
    color: #555;
    font-size: 16px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    height: 28px;
}

@media screen and (max-width: 950px) {
    .download-list .item {
        width: 25%;
    }
}

@media screen and (max-width: 767px) {
    .download-list .item {
        width: 33.33%;
    }
}

@media screen and (max-width: 600px) {
    .quarterly-intro .pic {
        float: none;
    }
    .quarterly-intro .txt {
        margin: 0;
    }
    .quarterly-intro .ps {
        position: static;
        margin-bottom: 10px;
    }
    .quarterly-intro .description {
        padding: 0;
    }
}

@media screen and (max-width: 560px) {
    .download-list .item {
        width: 50%;
    }
}

@media screen and (max-width: 400px) {
    .download-list .item {
        width: auto;
        float: none;
    }
    .download-list .item a {
        max-width: 240px;
    }
}