.core-section {
    padding: 11rem 0 10rem;
    background: #eaedf5;
}

.core-grid {
    display: flex;
    gap: 3rem;
    justify-content: center;
}

.core-item {
    flex: 1;
    background: #ffffff;
    padding: 10rem 0;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 0.2rem 1rem rgba(0, 0, 0, 0.03);
    transition: 0.3s;
}

.core-item:hover {
    transform: translateY(-0.5rem);
    box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.08);
}

.core-item .icon-wrap {
    width: 10rem;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.core-item .icon-wrap img {
    height: 10rem;
}

.core-item h3 {
    font-size: 4.8rem;
    font-weight: bold;
    color: #157f47;
}

/* =========== 集团概述 ============ */
.overview-section {
    padding: 6rem 0 10rem;
}

.overview-flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.about-tit{
    color: #004693;
    font-size: 6.8rem;
    font-weight: bold;
    line-height: 2.5;
    position: relative;
    flex: 0 0 100%;
    width: 100%;
    margin-bottom: 6rem;  
}

.overview-img-area {
    width: 92rem;
    flex-shrink: 0;
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
}

.overview-img-area > img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 0.5rem;
}

.about-tit::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    display: inline-block;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, #004693, #60ce94);
}

.overview-right {
    flex: 1;
    min-width: 0;
}

.overview-right span {
    font-size: 2.8rem;
    color: #157f47;
    margin-bottom: 2rem;
    text-align: justify;
    display: block;
    font-weight: bold;
}

.overview-right p {
    font-size: 2rem;
    color: #777;
    margin-bottom: 2rem;
    text-align: justify;
}

.hotspot {
    position: absolute;
    transform: translate(-50%, -50%);
    z-index: 3;
}

.hotspot-dot {
    width: 1.2rem;
    height: 1.2rem;
    background: #004693;
    border-radius: 50%;
    transition: all 0.3s ease;
    cursor: pointer;
}
.hotspot.active{
    pointer-events: none; 
    z-index: 1;
}
.hotspot.active .hotspot-dot {
    width: 8rem;
    height: 8rem;
    background: url(../images/CONTACT_15.png) center/contain no-repeat;
    background-size: 100% 100%;
    border-radius: 50%;
}

.overview-popup {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24rem;
    background: #ffffff;
    border-radius: 0.5rem;
    box-shadow: 0 0.5rem 2rem rgba(0,0,0,0.25);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    z-index: 20;
    pointer-events: none;
}

.overview-popup.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.overview-popup img {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 1.5rem;
    border-radius: 0.3rem;
}

.popup-green {
    font-size: 2rem;
    font-weight: bold;
    color: #27ae60;
    margin-bottom: 0.5rem;
    text-align: center;
    margin-top:1.5rem;  
}

.popup-black {
    font-size: 1.6rem;
    color: #333;
    line-height: 1.5;
    text-align: center;
    margin-bottom: 1.5rem;
}

/* ========= 企业文化 ========= */
.culture-section {
    padding: 6rem 0 85rem;
    background: #eaedf5 url(../images/aboutbg_19.jpg) no-repeat center bottom;
    background-size: auto 60%;
}

.culture-banner {
    background: url(../images/about_20.jpg) center/cover no-repeat;
    border-radius: 0.5rem;
    position: relative;
    text-align: center;
    width: 100%;
    height: 52rem;
    margin: 7rem 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.culture-banner p {
    font-size: 6rem;
    color: #ffffff;
    font-weight: bold;
    justify-content: center;
    line-height: 8rem;
}

.culture-banner .quote-line {
    position: relative;
}

/* 左引号 */
.culture-banner .quote-line::before {
    content: '“';
    font-size: 15rem;
    font-weight: lighter;
    color: rgba(255, 255, 255, 0.5);
    position: absolute;
    left: -6rem;
    top: 0;
    line-height: 1;
}

/* 右引号 */
.culture-banner .quote-line::after {
    content: '”';
    font-size: 15rem;
    font-weight: lighter;
    color: rgba(255, 255, 255, 0.5);
    position: absolute;
    right: -6rem;
    top: 0;
    line-height: 1;
}

.culture-banner .slogan {
    font-size: 2.8rem;
    color: #fff;
}

.culture-title{
    font-size: 2rem;
    color: #777;
    text-align: center;
}

.culture-title p{
    font-size: 3.8rem;
    color: #157f47;
    text-align: center;
    margin-bottom: 2rem;
    font-weight: bold;
}

/* ======== 使命价值观与追求 =============== */
.mission-section {
    background: #eaedf5;
    padding: 6rem 0;
}

.pursuit-section {
    background: #eaedf5;
    padding: 6rem 0;
}

.dual-col-wrap {
    display: flex;
    gap: 8rem;
    align-items: center;
}

.dual-col-wrap.right-img {
    flex-direction: row;
}

.dual-col-wrap.left-img {
    flex-direction: row-reverse;
}

.dual-col-text {
    flex: 1;
}

.dual-col-text h2 {
    font-size: 6.8rem;
    margin-bottom: 3.5rem;
    line-height: 1.2;
    padding: 1.5rem 0;
}

.dual-col-text h4 {
    font-size: 2.8rem;
    color: #157f47;
    margin-bottom: 1rem;
    font-weight: bold;
}

.dual-col-text .green-line {
    display: block;
    width: 100%;
    height: 1px;
    background: #bbb;
    margin-top: 2rem;
}

.dual-col-text .desc {
    font-size: 2rem;
    color: #777;
}

.dual-col-text .info-block {
    margin-bottom: 2.5rem;
}

.dual-col-img {
    flex: 1;
}

.dual-col-img img {
    width: 80rem;
    height: 52rem;
    object-fit: cover;
    border-radius: 0.5rem;
}

/* ======= 发展历程 =========== */
.timeline-section {
    padding: 6rem 0 14rem;
    background: #eaedf5 url(../images/aboutbg_28.jpg) center bottom no-repeat;
    background-size: auto 70% ;
}

/* 1. 大标题居中 */
.timeline-title {
    text-align: center;
    line-height: 1.2;
    padding: 0 0 4rem;
    margin-bottom: 8rem;
}

.timeline-title::before{
    width: 12rem;
    left: 50%;
    transform: translateX(-50%);
}

.timeline-wrapper {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 0.1rem;
    background: #bbb;
    transform: translateX(-50%);
    z-index: 1;
}

.tl-item {
    position: relative;
    width: 48%;
    z-index: 2;
}

.tl-item.left {
    margin-left: 0;
    margin-right: auto;
    text-align: right;
}
.tl-item.left h3, .tl-item.left .sub, .tl-item.left p {
    margin-right: 2.5rem;
}

.tl-item.right {
    margin-left: auto;
    margin-right: 0; 
    text-align: left;
}
.tl-item.right h3, .tl-item.right .sub, .tl-item.right p {
    margin-left: 2.5rem;
}

.tl-item h3 {
    font-size: 8rem;
    color: #004693;
    margin-bottom: 0.5rem;
}
.tl-item .sub {
    font-size: 2.8rem;
    color: #004693;
    font-weight: bold;
    margin-bottom: 0.8rem;
}
.tl-item p {
    font-size: 2rem;
    color: #777;
    line-height: 1.8;
}

.tl-item::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 7rem;
    height: 7rem;
    background: #103a6b;
    border-radius: 50%;
    z-index: 3;
    background: url(../images/shijianzhou_64.png) no-repeat center center;
}

.tl-item.active::before {
    background: url(../images/CONTACT_15.png) no-repeat center center;
}

.tl-item.left::before {
    right: -6.6rem; 
}

.tl-item.right::before {
    left: -6.6rem; 
}

/* ======== 荣誉资质 ============ */
.honors-section {
    background:#eaedf5 url(../images/aboutbg_29.jpg) no-repeat top center;
    padding: 6rem 0 13rem;
    background-size: auto 66%;
}

.honors-section .container{
    position: relative;
}

.honors-section .about-tit{
    color: #fff;
}

.honors-swiper {
    width: 100%;
    margin: 6rem 0 0;
    overflow: hidden;
    padding-bottom: 6rem;
}

.honors-swiper .honor-card {
    background: #ffffff;
    border-radius: 0.5rem;
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    box-shadow: 0 0.5rem 1.5rem rgba(0,0,0,0.15);
}

.honors-swiper .honor-card img {
    width: 100%;
    height: 42rem;
    object-fit: contain;
    margin-bottom: 2rem;
    border: 1px solid #efefef;
    padding: 1rem;
    background: #ffffff;
}

.honors-swiper .honor-card h4 {
    font-size: 2.8rem;
    line-height: 1.2;
    height: 6.7rem;
    color: #444444;
    text-align: center;
    font-weight: bold;
    padding: 0 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
}

.honors-swiper .honor-card h4::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: url(../images/aboutbtn_44.png) no-repeat;
    background-size: 100% auto;
    opacity: 0.5;
}

.honors-swiper .honor-card:hover h4::before {
    opacity: 1;
}

/* ===== 左右箭头（放在左右两侧） ===== */
.honors-section .container {
    position: relative;
}

.honors-prev,
.honors-next {
    position: absolute;
    top: 60%;
    transform: translateY(-50%);
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #ffffff;
    font-size: 2.4rem;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    user-select: none;
}

.honors-prev {
    left: -7rem;
}

.honors-next {
    right: -7rem;
}

.honors-prev:hover,
.honors-next:hover {
    background: #ffffff;
    color: #0e3463;
    border-color: #ffffff;
}

/* ===== 底部小点指示器 ===== */
.honors-pagination {
    display: flex !important;
    justify-content: center;
    gap: 1.2rem;
    margin-top: 4rem;
    position: relative;
    z-index: 5;
}

.swiper-pagination-bullet:only-child {
    display: flex !important;
}

.honors-pagination .swiper-pagination-bullet {
    width: 1.4rem;
    height: 1.4rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 1;
}

.honors-pagination .swiper-pagination-bullet-active {
    background: #004693;
    width: 4rem;
    border-radius: 1rem;
}

.video-section {
    padding: 6rem 0 13rem;
}

.video-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  width: 100%;
  margin-top: 6rem;
}

.video-card {
  flex: 0 0 calc((100% - 4rem) / 3);  
  position: relative;
  border-radius: 0.5rem;
  overflow: hidden;
  cursor: pointer;
}

.video-card:hover { 
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.5);
}

.video-card img {
    width: 100%;
    height: 38.5rem;
    object-fit: cover;
}

.video-card .play-btn-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 7.5rem;
    height: 7.5rem;
    background: url(../images/aboutbtn_55.png) no-repeat center center;
    background-size: 100% 100%;
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.2);
    transition: transform 0.3s;
}

.video-card:hover  .play-btn-wrapper{
    transform: translate(-50%, -50%) scale(1.1);
}

.video-card .video-name {
    width: 100%;
    text-align: center;
    color: #444;
    font-size: 2rem;
    line-height: 3;
    position: relative;
}

.video-card:hover .video-name::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    display: inline-block;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, #004693, #60ce94);
}


.video-modal-overlay {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    align-items: center;
    justify-content: center;
}
.video-modal-overlay.active {
    display: flex;
}

.video-modal-content {
    position: relative;
    background: #000000;
    width: 80rem;
    height: 45rem;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.6);
}

.video-modal-content video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.video-modal-content .video-modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    color: #ffffff;
    font-size: 3.2rem;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    line-height: 1;
}
.video-modal-content .video-modal-close:hover {
    color: #cccccc;
    transform: rotate(90deg);
}

@media (max-width: 767px) {

    .core-section {
        padding: 4rem 0;
    }

    .core-grid {
        flex-wrap: wrap;
        gap: 1.2rem;
    }

    .core-item {
        flex: 1 1 45%;
        min-width: 14rem;
        padding: 3rem 1.5rem;
        border-radius: 8px;
    }

    .core-item .icon-wrap {
        width: 5rem;
        margin-bottom: 1rem;
    }

    .core-item .icon-wrap img {
        height: 5rem;
    }

    .core-item h3 {
        font-size: 2.2rem;
    }

    .overview-section {
        padding: 4rem 0 5rem;
    }
    .overview-flex {
        flex-direction: column;
        gap: 3rem;
    }

    .overview-img-area {
        width: 100%;
        order: -1; 
    }

    .about-tit {
        font-size: 3.2rem;
        line-height: 1.4;
        padding-bottom: 0.8rem;
        margin-bottom: 2rem; 
    }

    .about-tit::before {
        height: 3px;
    }

    .overview-right {
        padding-left: 0;
        margin: 3rem 0 0;
    }

    .overview-right span {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
        text-align: left;
    }

    .overview-right p {
        font-size: 1.4rem;
        margin-bottom: 1.2rem;
        text-align: left;
        line-height: 1.8;
    }

    .hotspot-dot {
        width: 0.8rem;
        height: 0.8rem;
    }

    .hotspot.active .hotspot-dot {
        width: 6rem;
        height: 6rem;
    }

    .culture-section {
        padding: 4rem 0 40rem;
        background-position: center bottom;
    }

    .culture-banner {
        height: auto;
        padding: 5rem 2rem;
        margin: 3rem 0;
        border-radius: 8px;
    }

    .culture-banner .slogan {
        font-size: 1.6rem;
        margin-bottom: 1.5rem;
    }

    .culture-banner p {
        font-size: 2.4rem;
        line-height: 1.5;
    }

    .culture-banner p span {
        font-size: 5rem;
        vertical-align: middle;
    }

    .culture-title p {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .culture-title span {
        font-size: 1.3rem;
        line-height: 1.8;
    }

    .mission-section,
    .pursuit-section {
        padding: 4rem 0;
    }

    .dual-col-wrap,
    .dual-col-wrap.right-img,
    .dual-col-wrap.left-img {
        flex-direction: column;
        gap: 2.5rem;
    }

    .dual-col-text h2 {
        font-size: 3.2rem;
        margin-bottom: 2rem;
    }

    .dual-col-text h4 {
        font-size: 1.8rem;
    }

    .dual-col-text .desc {
        font-size: 1.4rem;
        line-height: 1.8;
    }

    .dual-col-text .green-line {
        margin-top: 1.2rem;
    }

    .dual-col-text .info-block {
        margin-bottom: 2rem;
    }

    .dual-col-img {
        width: 100%;
    }

    .dual-col-img img {
        width: 100%;
        height: auto;
        max-height: 24rem;
        object-fit: cover;
        border-radius: 8px;
    }

    .timeline-section {
        padding: 4rem 0 6rem;
        background-size: auto 40%;
    }

    .timeline-title {
        margin-bottom: 4rem;
        padding-bottom: 2rem;
    }

    .timeline-line {
        left: 2.5rem;
        transform: none;
        width: 2px;
    }

    .tl-item {
        width: 100%;
        padding-left: 5rem;
        margin-bottom: 3.5rem;
        text-align: left !important;
    }

    .tl-item.left,
    .tl-item.right {
        margin-left: 0;
        margin-right: 0;
    }

    .tl-item h3 {
        font-size: 3.6rem;
        margin-bottom: 0.3rem;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }

    .tl-item .sub {
        font-size: 1.6rem;
        margin-bottom: 0.6rem;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }

    .tl-item p {
        font-size: 1.3rem;
        line-height: 1.7;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }

    /* 统一圆点位置到左侧 */
    .tl-item::before {
        left: 0.8rem;
        top: 0.8rem;
        transform: none;
        width: 3.2rem;
        height: 3.2rem;
        background-size: 60% auto;
    }

    .tl-item.active::before {
        background-size: 60% auto;
    }

    .honors-section {
        padding: 4rem 0 6rem;
        background-size: auto 100%;
    }

    .honors-swiper {
        height: auto;
        margin-top: 3rem;
        padding-bottom: 4rem;
    }

    .honors-swiper .honor-card {
        padding: 1.5rem 1rem;
    }

    .honors-swiper .honor-card img {
        height: 20rem;
        margin-bottom: 1.2rem;
        padding: 0.5rem;
    }

    .honors-swiper .honor-card h4 {
        font-size: 1.6rem;
        height: auto;
        padding: 0 1.5rem;
        min-height: 5rem;
    }

    .honors-swiper .honor-card h4::before {
        background-size: 100% auto;
    }

    .honors-prev,
    .honors-next {
        width: 3.6rem;
        height: 3.6rem;
        font-size: 1.6rem;
        top: 40%;
    }

    .honors-prev {
        left: 0.5rem;
    }

    .honors-next {
        right: 0.5rem;
    }

    .honors-pagination {
        gap: 1rem;
        margin-top: 2rem;
    }

    .honors-pagination .swiper-pagination-bullet {
        width: 1rem;
        height: 1rem;
    }

    .honors-pagination .swiper-pagination-bullet-active {
        width: 3rem;
    }
    
    .video-section {
        padding: 4rem 0;
    }

    .video-wrap {
        width: 100%;
        margin-top: 3rem;
    }

    .video-card{
        width: 100%;
        flex:none
    }

    .video-card img {
        height: auto;
        max-height: 22rem;
        object-fit: cover;
    }

    .video-card .play-btn-wrapper {
        width: 4.5rem;
        height: 4.5rem;
    }

    .video-card .video-name {
        font-size: 1.4rem;
        line-height: 2.4;
    }

    .video-modal-content {
        width: 92vw;
        height: auto;
        aspect-ratio: 16 / 9;
        max-height: 60vh;
        border-radius: 0.4rem;
    }

    .video-modal-content .video-modal-close {
        top: 1rem;
        right: 1rem;
        font-size: 2.4rem;
    }

    .container {
        width: 92%;
        padding: 0;
    }
    .culture-banner .quote-line::before {
        font-size: 5rem;
        left: -1.5rem;
    }
    .culture-banner .quote-line::after {
        font-size: 5rem;
        right: -1.5rem;
    }

    .overview-popup {
        width: 18rem;
    }
    .popup-green {
        font-size: 1.4rem;
    }
    .popup-black {
        font-size: 1.2rem;
    }
    
}