/* 背景内容、tab */
.about-bg {
    background-image: url(../img/about-bg.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 410px;
    position: relative;
}

.bg-wrap h2 {
    font-size: 60px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    padding-top: 126px;
}

.bg-wrap .tab-wrap {
    width: 1400px;
    position: absolute;
    bottom: -49.5px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99;
}

.bg-wrap .tab-nav {
    width: 100%;
    display: flex;
    border: 1px solid rgba(0, 21, 85, 0.99);
    border-radius: 7px;
}

.bg-wrap .tab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    width: calc(100% / 3);
    height: 99px;
    border: none;
    text-align: center;
    background-color: #fff;
    color: rgba(0, 21, 85, 0.99);
    font-size: 28px;
}

.bg-wrap .tab-btn:nth-child(1) {
    border-radius: 7px 0 0 7px;
}

.bg-wrap .tab-btn:last-child {
    border-radius: 0px 7px 7px 0px;
}

.bg-wrap .tab-btn:nth-child(2) {
    border-left: 1px solid rgba(0, 21, 85, 0.99);
    border-right: 1px solid rgba(0, 21, 85, 0.99);
}

.bg-wrap .tab-btn .icon {
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    margin-right: 51px;
}

.bg-wrap .tab-btn:nth-child(1) .icon {
    width: 77.23px;
    height: 63.04px;
}

.bg-wrap .tab-btn:nth-child(2) .icon {
    width: 71.4px;
    height: 61.96px;
}

.bg-wrap .tab-btn:nth-child(3) .icon {
    width: 41.68px;
    height: 69.72px;
}

.bg-wrap .tab-btn.active {
    color: #fff;
}

.bg-wrap .tab-btn.active .icon {
    /* filter: brightness(0) invert(1); */
}

.bg-wrap .tab-btn.active {
    background-color: rgba(0, 21, 85, 0.99);
}

@media (max-width: 768px) {
    .about-bg {
        height: 150px;
    }

    .bg-wrap h2 {
        font-size: 17px;
        padding-top: 44px;
    }

    .bg-wrap .tab-wrap {
        width: 100%;
        padding: 0 20px;
        position: absolute;
        bottom: -25px;
    }

    .bg-wrap .tab-btn {
        height: 50px;
        font-size: 12px;
        text-align: left;
        padding: 5px;
    }

    .bg-wrap .tab-btn .icon {
        margin-right: 5px;
    }

    .bg-wrap .tab-btn:nth-child(1) .icon {
        width: 17px;
        height: 16px;
    }

    .bg-wrap .tab-btn:nth-child(2) .icon {
        width: 17px;
        height: 17px;
    }

    .bg-wrap .tab-btn:nth-child(3) .icon {
        width: 14px;
        height: 17px;
    }
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.card {
    margin-top: 128px;
}

@media (max-width: 768px) {
    .card {
        margin-top: 0px;
    }
}

/* 公司简介 */
.introduction {
    margin-bottom: 75px;
}

.introduction-wrap {
    background-image: url('../img/about-bg-2.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    height: 751px;
}

.introduction h2 {
    font-weight: 700;
    color: rgba(0, 21, 85, 0.99);
    font-size: 40px;
    position: relative;
    padding-bottom: 35.5px;
    border-bottom: 0.2px solid #707070;
    margin-bottom: 47px;
}

.introduction h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1.5px;
    width: 157px;
    height: 3px;
    background-color: rgba(0, 21, 85, 0.99);
}

.introduction-content {
    display: flex;
}

.introduction-content .content-section {
    width: 661px;
}

.introduction-content .content-section p {
    line-height: 40px;
}

.introduction-content .content-section p:last-child {
    margin-top: 50px;
}

.introduction-content .label-section {
    margin-left: 269px;
    display: flex;
    flex-direction: column;
    justify-content: start;
    align-items: center;
}

.introduction-content .label-item:nth-child(1) {
    margin-top: 53px;
}

.introduction-content .label-item:nth-child(2) {
    margin-top: 52px;
}

.introduction-content .label-item:nth-child(3) {
    margin-top: 66px;
}

.introduction-content .item-num {
    font-size: 40px;
    font-weight: 700;
    color: #001555;
}

.introduction-content .item-num span {
    font-size: 20px;
    font-weight: 400;
    color: #333;
}

.introduction-content .des {
    margin-top: 8px;
}

.qualification {
    padding-top: 71.5px;
}

.qualification img:nth-child(1) {
    margin-top: 18px;
    width: 100%;
    height: 937px;
    object-fit: contain;
}

.qualification img:nth-child(2) {
    margin-top: 31px;
    width: 100%;
    height: 1001px;
    object-fit: contain;
}

@media (max-width: 768px) {
    .introduction-wrap {
        height: auto;
    }

    .introduction {
        margin-bottom: 0px;
        padding-top: 20px;
    }

    .introduction h2 {
        font-size: 16px;
        padding-bottom: 12px;
        margin-bottom: 20px;
    }

    .introduction h2::after {
        width: 65px;
        height: 2px;
    }

    .introduction-content {
        display: flex;
        flex-direction: column;
    }

    .introduction-content .content-section {
        width: 100%;
    }

    .introduction-content .content-section p {
        font-size: 13px;
        line-height: 26px;
    }

    .introduction-content .content-section p:last-child {
        margin-top: 15px;
    }

    .introduction-content .label-section {
        width: 100%;
        margin-top: 20px;
        font-size: 13px;
        display: flex;
        flex-direction: row;
        justify-content: flex-start;
        margin-left: 0px;
    }

    .introduction-content .label-item:nth-child(1),
    .introduction-content .label-item:nth-child(2),
    .introduction-content .label-item:nth-child(3) {
        margin-top: 0px;
    }

    .introduction-content .label-item {
        width: 33.33%;
    }

    .introduction-content .item-num {
        font-size: 16px;
    }

    .introduction-content .item-num span {
        font-size: 12px;
    }

    .qualification {
        padding-top: 5px;
    }

    .qualification img:nth-child(1) {
        margin-top: 10px;
        width: 100%;
        height: 200px;
        object-fit: contain;
    }

    .qualification img:nth-child(2) {
        margin-top: 15px;
        width: 100%;
        height: 200px;
        object-fit: contain;
    }
}

/* 新闻动态 */
.article-list {
    display: flex;
    flex-direction: column;
}

.article-card {
    height: 404px;
    display: flex;
    background-color: #fff;
    border: 1px solid #707070;
    border-radius: 7px;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
    margin-bottom: 45px;
}

.article-card:last-child {
    margin-bottom: 0px;
}

.article-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.article-image {
    width: 539px;
    height: 100%;
    object-fit: cover;
}

.article-content {
    flex: 1;
    padding: 0px 59px 31px 161px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.article-date {
    font-weight: 700;
    color: rgba(0, 21, 85, 0.99);
    font-size: 50px;
    margin-top: 70px;
}

.article-year {
    color: #eee;
    font-weight: 400;
    font-size: 33px;
}

.article-desc {
    font-size: 30px;
    color: #333;
    margin-top: 78px;
    line-height: 45px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    overflow: hidden;
    text-overflow: ellipsis;
}

.article-arrow {
    color: #001555;
    display: block;
    text-align: right;
}

.card .pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin: 75px 0px 75px;
}

.card .page-btn {
    width: 42px;
    height: 19px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #ffffff;
    border: 1px solid #001555;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 20px;
    color: #001555;
}

.card .page-btn:hover {
    background: #001555;
    color: #fff;
}

@media (max-width: 768px) {
    .card .pagination {
        gap: 12px
    }

    .card .page-btn {
        width: 30px;
        height: 16px;
    }

    .card .page-btn span {
        font-size: 14px !important;
    }
}

@media (max-width: 768px) {
    .article-list {
        margin-top: 20px;
    }

    .article-card {
        height: 120px;
        width: 100%;
        margin-bottom: 20px;
    }

    .article-image {
        width: 40%;
    }

    .article-content {
        flex: 1;
        padding: 10px 15px;
        font-size: 13px;
    }

    .article-date {
        font-size: 15px;
        margin-top: 0px;
    }

    .article-year {
        font-size: 12px;
    }

    .article-desc {
        margin-top: 10px;
        line-height: 21px;
        font-size: 13px;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .article-arrow {
        font-size: 13px !important;
    }

    .card .pagination {
        margin: 20px 0px 0px;
    }
}

@media (max-width: 768px) {
    .contact {
        margin-top: 40px;
    }
}