.big-title {
    padding-top: 80px;
    height: 90px;
    line-height: 90px;
    text-align: center;
    color: #333;
    font-size: 30px;
    border-bottom: 1px solid #ECECEC;
}

.nav {
    border-bottom: 1px solid #ECECEC;
}

.nav .container {
    height: 52px;
    position: relative;
}

.nav .left {
    color: #666666;
    font-size: 0;
}

.nav .left li {
    font-size: 20px;
    line-height: 52px;
    position: relative;
    float: left;
    margin-right: 104px;
    cursor: pointer;
}

.nav .left li:last-child {
    margin-right: 0;
}

.nav .left li.active {
    color: #286EFA;
    font-weight: bold;
}

.nav .left li.active::after {
    content: '';
    width: 100%;
    height: 2px;
    background: #286EFA;
    position: absolute;
    left: 0;
    bottom: 0;
}

.nav .category-wrapper {
    width: 142px;
    text-align: right;
    position: absolute;
    right: 0;
    bottom: 0;
    padding-bottom: 14px;
}

.nav .category-wrapper .head {
    color: #666;
    font-size: 20px;
    font-weight: 800;
    cursor: pointer;
}

.nav .category-wrapper .el-icon-caret-bottom,
.nav .category-wrapper .el-icon-caret-top {
    color: #A5A5A5;
    margin-left: 20px;
}

.nav .category-wrapper .category {
    width: 362px;
    padding-top: 30px;
    border-radius: 10px;
    border: 1px solid rgba(239, 239, 239, 1);
    box-shadow: 3px 3px 14px 1px rgba(0, 0, 0, 0.2);
    position: absolute;
    left: 50%;
    top: 40px;
    transform: translate(-50%);
    z-index: 10;
    background: #fff;
    color: #999;
    font-size: 18px;
}

.nav .category-wrapper .category h4 {
    color: #666;
    font-weight: bold;
    text-align: center;
    margin-bottom: 30px;
    font-size: 18px;
}

.nav .category-wrapper .category ul {
    display: flex;
    flex-wrap: wrap;
}

.nav .category-wrapper .category li {
    width: 50%;
    text-align: center;
    margin-bottom: 30px;
}

.nav .category-wrapper .category li span {
    cursor: pointer;
    font-weight: 500;
}

.nav .category-wrapper .category li span.active {
    color: #286EFA;
    font-weight: bold;
}

.fade-enter-active, .fade-leave-active {
    transition: opacity .5s;
}

.fade-enter, .fade-leave-to {
    opacity: 0;
}

/* 正文 */
.main .result {
    max-width: 1500px;
    margin: 0 auto;
    height: 72px;
    line-height: 72px;
    text-align: right;
    font-size: 20px;
    color: #333;
}

.main .result span {
    color: #FE2828;
}

.main .images {
    padding-bottom: 52px;
}

.main .images > ul > li {
    width: 24%;
    float: left;
    margin-right: 1%;
    margin-bottom: 30px;
}

.main .images li:nth-child(4n) {
    margin-right: 0;
}

.main .images li .thumb {
    width: 100%;
    height: auto;
    overflow: hidden;
    margin-bottom: 25px;
}

.main .images li .thumb a {
    display: block;
    transition: all 0.3s ease-in-out;
}

.main .images li .thumb a img {
    width: 100%;
}

.main .images li:hover .thumb a {
    transform: scale(1.1);
}

.main .images li .title {
    color: #333333;
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 800;
}

.main .images li .desc {
    font-size: 0;
}

.main .images li .author,
.main .container li .category {
    color: #999999;
    font-size: 16px;
}

.main .images li .category {
    float: right;
}

.main .pagination {
    text-align: center;
}

.main .author {
    text-align: center;
}

.el-pager li.active {
    color: #fff;
    background: #286EFA;
}

@media screen and (max-width: 750px) {
    .big-title {
        padding-top: 50px;
        height: 40px;
        line-height: 40px;
        font-size: 16px;
    }

    .nav {
        padding: 10px;
    }

    .nav .left li {
        font-size: 16px;
        margin-right: 30px;
    }

    .nav .category-wrapper {
        display: none;
    }

    .main {
        padding: 10px;
    }

    .main .result {
        font-size: 14px;
        height: 36px;
        line-height: 36px;
    }

    .main .images {
        padding-bottom: 20px;
    }

    .main .images > ul > li {
        width: 49%;
        margin-right: 2%;
    }

    .main .images li:nth-child(2n) {
        margin-right: 0;
    }

    .main .images li .thumb {
        margin-bottom: 10px;
    }

    .main .images li .title {
        font-size: 16px;
        height: 28px;
        line-height: 28px;
        overflow: hidden;
    }

    .main .images li .author, .main .container li .category {
        font-size: 14px;
    }
}