/*顶部*/
.highlight {
    width: 100%;
    position: relative;
}

.highlight .image {
    width: 100%;
    height: 550px;
}

.highlight img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.highlight .info {
    width: 100%;
    line-height: 80px;
    padding: 60px 100px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight .keyword {
    width: 200px;
    line-height: 30px;
    text-align: center;
    background: #333333;
    font-family: Arial;
    font-size: 12px;
    color: #ffffff;
    font-weight: 400;
    font-style: normal;
}
.highlight .title {
    width: 100%;
    display: flex;
    justify-content: space-between;
}
.highlight .title .shorttitle {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 42px;
    font-weight: bolder;
    color: #000000;
}

.highlight .title .date {
    font-family: Times New Roman, Times, serif;
    font-size: 62px;
    font-weight: bolder;
    color: #ffffff;
}

.highlight .full-width-background {
    top: 100px;
    height: 700px;
    background: #cccccc;
}

.timeline {
    position: relative;
    margin: 30px;
}

.timeline::before {
    height: 100%;/*竖线高度*/
    width: 1px;
    border-left: 1px dotted #999999;/*竖线宽度*/
    content: '';
    position: absolute;
    top: 0;
    left: 0; /* 竖线水平位置 */
}

.timeline .timeline-item {
    display: flex;
    position: relative;
}

.timeline .timeline-item .timeline-left {
    position: relative;
    width: 70px; /* 左侧宽度和 padding-left 对应 */
}

.timeline .timeline-item .timeline-dot {
    position: absolute;
    left: 0; /* 圆点居中竖线 */
    top: 50px; /*圆点高度*/
    width: 14px;
    height: 14px;
    background-color: #8b0000;
    border-radius: 50%;
    transform: translate(-50%, -50%); /* 左右上下居中 */
}

.timeline .timeline-item .timeline-content,
.timeline .timeline-item .milestone,
.timeline .timeline-item .link {
    width: 1000px;
    padding: 30px 0;
}

.timeline .timeline-item:not(:last-child) .timeline-content,
.timeline .timeline-item:not(:last-child) .milestone,
.timeline .timeline-item:not(:last-child) .link {
    border-bottom: 1px solid #cccccc;
}

.timeline .timeline-item .timeline-content {
    display: flex;
}

.timeline .timeline-item .timeline-content .date {
    width: 100px;
    font-size: 28px;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bolder;
}

.timeline .timeline-item .timeline-content .content {
    width: 900px;
}

.timeline .timeline-item .timeline-content p {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 2;
    color: #333333;
}

.timeline .timeline-item .milestone .title {
    height: 40px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 24px;
    font-weight: bolder;
}

.timeline .timeline-item .milestone .line {
    width: 100%;
    height: 2px;
    margin: 10px 0;
    background: linear-gradient(to right, #770000 0%, #770000 60px, #ddd 60px, #ddd 100%);
}

.timeline .timeline-item .milestone .content {
    margin-top: 40px;
    overflow: hidden; /* 清除浮动影响，确保容器高度包裹内容 */
}

.timeline .timeline-item .milestone .content img {
    float: left;       /* 图片浮动到左边 */
    width: 500px;
    height: 375px;
    margin-right: 20px; /* 图片和文字间距 */
    margin-bottom: 10px; /* 底部间距，避免文字贴紧图片底部 */
}

.timeline .timeline-item .milestone .content p {
    margin: 0 0 10px 0;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 2;
    color: #333333;
}

.timeline .timeline-item .link a {
    position: relative;
    display: inline-block;
    line-height: 45px;
    font-family: Arial;
    font-size: 18px;
    color: #666666;
    text-decoration: none;
    transition: color .3s;
    padding: 0 20px 0 5px;
}

/* 细线（始终存在） */
.timeline .timeline-item .link a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background-color: #444444;
}

/* 粗线（hover 时从左到右出现） */
.timeline .timeline-item .link a::before {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 4px;
    background-color: #444444;

    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .3s ease;
}

/* hover：粗线从左到右铺开 */
.timeline .timeline-item .link a:hover::before {
    transform: scaleX(1);
}

.history-summary {
    position: relative;
    width: 100%;
    padding: 70px 0;
}

.history-summary .section-title {
    line-height: 75px;
    font-family: Arial;
    font-size: 48px;
    color: #ffffff;
    font-weight: bold;
    font-style: normal;
    text-align: right;
}

.history-summary .content {
    margin: 10px 0;
    display: flex;
    position: relative;
    flex-direction: row;
}
.history-summary .content a{
    width: 400px;
    min-height: 500px;
    text-decoration: none;
    color: inherit;
}

.history-summary .content .item{
    width: 100%;
    height: 100%;
    background-color: #333333;
    border: 1px solid #cccccc;
    transition: box-shadow .3s, border .3s, background-color .3s, color .3s, transform .3s;
}

.history-summary .content .item:hover{
    transform: translateY(-3px);
    background-color: rgb(34, 34, 34);
}

.history-summary .item .image {
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.history-summary .item .image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s;
}

.history-summary .item .image:hover img {
    transform: scale(1.3);
}

.history-summary .item .keyword {
    padding: 0 14px;
}
.history-summary .item .shorttitle,
.history-summary .item .detail {
    padding: 0 20px;
}

.history-summary .item .keyword {
    position: relative;
    max-width: 100%;
    overflow: hidden;
    height: 28px;
    line-height: 28px;
    transform: translateY(-50%);
    background-color: #770000;
    text-align: center;
    display: inline-block;
    font-family: Arial;
    font-size: 12px;
    color: #ffffff;
    font-weight: 400;
    text-decoration: none;
    font-style: normal;
    vertical-align: top;
    white-space: nowrap;
}

.history-summary .item .shorttitle {
    width: 300px;
    height: 72px;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
    color: #ffffff;
    font-weight: bolder;
    font-size: 24px;
}

.history-summary .item .detail {
    width: 100%;
    display: flex;
    gap: 20px;
    margin-top: 30px;
    margin-bottom: 40px;
}

.history-summary .item .description {
    width: 220px;
    line-height: 1.2;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    color: #999999;
}

.history-summary .item .title {
    width: 120px;
    font-family: Arial;
    font-size: 52px;
    color: #ffffff;
    font-weight: 400;
    font-style: normal;
}

.history-summary .full-width-background {
    background-color: #222222;
}