/**
 * 顶部小导航
 */
.header-top {
    position: absolute;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, .07);
    z-index: 2;
    border: 0;
}
.top-nav-right {
    background: transparent;
    border: 0;
}
@media only screen and (max-width:640px) {
    .header-top * {
        color: #333333;
    }
}

/**
 * 头部导航
 */
.doc-head {
    position: relative;
    overflow: hidden;
}
.doc-head .doc-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}
.doc-head .head-content {
    position: relative;
    z-index: 1;
    padding: 12rem 1rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0, 0, 0, 0.1);
}
.doc-head .head-content .logo img {
    max-width: 22rem;
}
@media only screen and (max-width:640px) {
    .doc-head .head-content {
        padding: 8rem 1rem;
    }
}


/**
 * 头部导航-列表
 */
.doc-navigation {
    position: absolute;
    left: auto;
    bottom: 2rem;
}
.doc-navigation li {
    float: left;
}
.doc-navigation a {
    color: #fff;
    font-size: 1.6rem;
    padding: 1rem 2.4rem;
}
@media only screen and (max-width:640px) {
    .doc-navigation a {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/**
 * 文档列表
 */
.doc-list {
    width: calc(100% + 1.2rem);
    margin-left: -0.6rem;
    margin-top: 1.4rem;
}
.doc-list li {
    padding: 0.6rem;
}
.doc-list li h4 {
    font-size: 2rem;
}
.doc-list li img {
    width: 10rem;
}
.doc-list li .cover-content {
    position: relative;
}
.doc-list li .cover-name {
    position: absolute;
    width: calc(100% - 1.8rem);
    left: 1.2rem;
    top: 2rem;
    color: #fff;
}
.doc-list li .base-right {
    width:calc(100% - 11rem);
}
.doc-list li .base-right .describe {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    white-space: initial !important;
}
.doc-list li:hover .describe {
    color: #333;
}
@media only screen and (max-width:640px) {
    .doc-list li h4 {
        margin-top: 0.5rem;
    }
}

/**
 * 底部页脚
 */
.am-footer-default {
    border: 0;
    background: transparent;
}