@charset "UTF-8";

/* 关于页面特有样式 */

/* ========================================
   公司简介Banner区域
   ======================================== */
.about-banner {
    position: relative;
    padding: 60px 0;
    background-color: #d7000f;
    overflow: hidden;
}

.banner-decoration {
    position: absolute;
    left: 50px;
    bottom: 0;
    width: 300px;
}

.banner-decoration img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.about-banner .container {
    position: relative;
    z-index: 1;
}

.banner-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 40px;
}

.banner-left {
    flex: 1;
}

.banner-title-wrapper {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 15px;
    margin-bottom: 25px;
}

.banner-title-wrapper .icon {
    position: absolute;
    bottom: 0;
    left: 0;
    display: flex;
    align-items: center;
    gap: 5px;
}

.banner-title-wrapper .icon div {
    width: 40px;
    height: 2px;
}

.banner-title-wrapper .icon div:nth-child(1) {
    background-color: #d7000f;
}

.banner-title-wrapper .icon div:nth-child(2) {
    background-color: #d7000f;
}

.banner-title-wrapper .icon div:nth-child(3) {
    background-color: #d7000f;
}

.banner-left h1 {
    font-size: 36px;
    font-weight: bold;
    color: #fff;
    margin: 0;
}

.title-english {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: normal;
    letter-spacing: 2px;
}

.banner-desc {
    color: #fff;
    font-size: 14px;
    line-height: 1.8;
    text-align: justify;
    opacity: 0.95;
    margin: 0;
}

.banner-right {
    width: 380px;
    flex-shrink: 0;
}

.banner-images {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.banner-images img {
    width: 100%;
}

.banner-nav {
    position: absolute;
    bottom: -100px;
    right: 3px;
    display: flex;
    gap: 0;
    height: 40px;
}

.banner-nav .nav-item {
    height: 100%;
    padding: 0 10px;
    color: #fff;
    font-size: 14px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    text-decoration: none;
    background-color: #e6454a;
}

.banner-nav .nav-item:hover {
    background-color: #d7000f;
    color: #fff;
    font-weight: bold;
}

/* ========================================
   企业文化区域
   ======================================== */
.about-culture {
    padding: 60px 0;
    background-color: #fff;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 30px;
    font-weight: bold;
    color: #333;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #CCCCCC;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, minmax(120px, 1fr));
    gap: 25px;
    min-height: 600px;
}

.culture-item {
    background-color: #f5f5f5;
    padding: 10px;
    text-align: left;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
}

.culture-item:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

.culture-item.main {
    grid-column: 1 / 4;
    grid-row: 1 / 4;
    padding: 40px;
    background-color: #f5f5f5;
    text-align: center;
    align-items: center;
    justify-content: center;
}

.culture-item.right-item:nth-child(2) {
    grid-column: 4;
    grid-row: 1;
}

.culture-item.right-item:nth-child(3) {
    grid-column: 4;
    grid-row: 2;
}

.culture-item.right-item:nth-child(4) {
    grid-column: 4;
    grid-row: 3;
}

.culture-bottom {
    grid-column: 1 / 5;
    grid-row: 4;
    display: contents;
}

.culture-bottom .culture-item:nth-child(1) {
    grid-column: 1;
    grid-row: 4;
}

.culture-bottom .culture-item:nth-child(2) {
    grid-column: 2;
    grid-row: 4;
}

.culture-bottom .culture-item:nth-child(3) {
    grid-column: 3;
    grid-row: 4;
}

.culture-bottom .culture-item:nth-child(4) {
    grid-column: 4;
    grid-row: 4;
}

.culture-icon {
    width: 70px;
    height: 70px;
    margin: 0 0 10px 0;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.culture-icon img {
    width: 45px;
    height: 45px;
    object-fit: contain;
}

.culture-item.main .culture-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 25px;
}

.culture-item.main .culture-icon img {
    width: 80px;
    height: 80px;
}

.culture-item h3 {
    font-size: 16px;
    font-weight: bold;
    color: #333;
    margin-bottom: 12px;
}

.culture-item p {
    font-size: 13px;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.culture-item.main p {
    font-size: 14px;
    text-align: justify;
    color: #555;
}

/* ========================================
   企业荣誉区域
   ======================================== */
.honors-wrapper {
    position: relative;
}

.honors-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.honors-bg img {
    width: 100%;
    height: 100%;
}

.about-honors {
    padding: 60px 0;
    position: relative;
    z-index: 1;
}

.about-honors .section-header h2 {
    color: #fff;
}

.about-honors .section-header h2::after {
    background-color: #FFFFFF;
}

.honors-grid {
    display: flex;
    gap: 30px;
    justify-content: center;
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 55px 60px;
    background-color: #fff;
}

.honors-col {
    flex: 1;
    max-width: 50%;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-left: 100px;
}

.honor-item {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.honor-badge {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    object-fit: contain;
}

.honor-title {
    font-size: 18px;
    color: #333;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    transition: color 0.3s ease;
}

.honor-item:hover .honor-title {
    color: #d7000f;
}

/* ========================================
   发展历程区域
   ======================================== */
.about-history {
    padding: 60px 0;
    background-color: #fff;
}

.timeline {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 40px;
    align-items: start;
}

.timeline-items {
    position: relative;
    min-height: 130px;
}

.timeline-items::before {
    content: '';
    position: absolute;
    left: 45px;
    top: 45px;
    bottom: -20px;
    width: 3px;
    background-color: #e8e8e8;
}

.timeline-item {
    position: relative;
    display: flex;
    align-items: center;
    padding: 25px 0;
}

.timeline-item:first-child {
    padding-top: 0;
}

.timeline-year {
    width: 90px;
    height: 90px;
    background-color: #e5737d;
    color: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(200, 16, 46, 0.3);
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-year:hover {
    background-color: #d7000f;
    color: #fff;
    cursor: default;
}

.timeline-year,
.timeline-year .year-num,
.timeline-year .year-label {
    cursor: default;
}

.year-num {
    font-size: 20px;
    font-weight: bold;
    line-height: 1;
}

.year-label {
    font-size: 10px;
    opacity: 0.8;
    margin-top: 3px;
}

.timeline-item.active .timeline-year {
    background-color: #d7000f;
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(200, 16, 46, 0.4);
}

.timeline-display {
    position: relative;
    min-height: 130px;
}

.timeline-content {
    display: none;
}

.timeline-content.active {
    display: flex;
    flex-wrap: wrap;
}

.timeline-content .timeline-text {
    width: 100%;
    border: 1px solid #F0F0F0;
    padding: 10px;
    margin-bottom: 20px;
}

.timeline-content h3 {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin: 0 0 10px;
}

.timeline-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    margin: 0 0 15px;
}

.timeline-picture {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 50%;
    margin-bottom: 10px;
}

.timeline-picture img {
    width: 99%;
    height: auto;
    display: block;
    border-radius: 10px / 10px;
}

.timeline-picture h5 {
    line-height: 20px;
    text-align: center;
    margin-top: 10px;
    font-size: 14px;
}

.timeline-picture:hover h5 {
    color: #d7000f;
}

.timeline-arrows {
    position: absolute;
    left: 45px;
    bottom: -20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 15px 0 0;
    transform: translateX(-50%);
}

.timeline-arrow {
    width: 12px;
    height: 12px;
    border-left: 2px solid #d7000f;
    border-bottom: 2px solid #d7000f;
    transform: rotate(-45deg);
}

/* 交互效果 */
.culture-item.hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    transform: translateY(-5px);
}

/* ========================================
   响应式布局 - 平板端
   ======================================== */
@media (max-width: 1024px) {
    .about-banner {
        padding: 40px 0;
    }

    .banner-decoration {
        left: 20px;
    }

    .banner-content {
        flex-direction: column;
        gap: 30px;
    }

    .banner-left h1 {
        font-size: 28px;
    }

    .title-english {
        font-size: 16px;
    }

    .banner-right {
        width: 100%;
    }

    .banner-nav {
        right: 3px;
        bottom: -80px;
    }

    .section-header {
        margin-bottom: 0;
    }

    .culture-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 20px;
        min-height: auto;
    }

    .culture-item.main {
        grid-column: 1;
        grid-row: auto;
        background-color: transparent;
    }

    .culture-item.right-item:nth-child(2),
    .culture-item.right-item:nth-child(3),
    .culture-item.right-item:nth-child(4) {
        grid-column: 1;
        grid-row: auto;
    }

    .culture-bottom {
        grid-column: 1;
        display: contents;
    }

    .culture-bottom .culture-item:nth-child(1),
    .culture-bottom .culture-item:nth-child(2),
    .culture-bottom .culture-item:nth-child(3),
    .culture-bottom .culture-item:nth-child(4) {
        grid-column: 1;
        grid-row: auto;
    }

    .culture-item.main .culture-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 18px;
    }

    .culture-item.main .culture-icon img {
        width: 50px;
        height: 50px;
    }

    .honors-grid {
        flex-direction: column;
        gap: 12px;
        padding: 0 20px 60px;
    }

    .honors-col {
        max-width: 100%;
        padding-left: 0;
    }

    .honor-item {
        padding-left: 15px;
    }

    .honor-title {
        font-size: 13px;
    }

    .timeline {
        grid-template-columns: 60px 1fr;
        gap: 30px;
    }

    .timeline-items::before {
        left: 30px;
        top: 30px;
        bottom: -15px;
    }

    .timeline-year {
        width: 60px;
        height: 60px;
    }

    .year-num {
        font-size: 16px;
    }

    .year-label {
        font-size: 9px;
    }

    .timeline-item {
        padding: 20px 0;
    }

    .timeline-arrows {
        left: 30px;
        bottom: -15px;
    }

    .section-header h2 {
        font-size: 24px;
    }
}

/* ========================================
   响应式布局 - 手机端
   ======================================== */
@media (max-width: 768px) {
    .about-banner {
        padding: 30px 0;
    }

    .banner-decoration {
        display: none;
    }

    .banner-left h1 {
        font-size: 24px;
    }

    .title-english {
        font-size: 14px;
        letter-spacing: 1px;
    }

    .banner-desc {
        font-size: 13px;
    }

    .banner-images {
        flex-direction: row;
        gap: 8px;
    }

    .banner-images img {
        width: calc(50% - 4px);
    }

    .banner-nav {
        height: 36px;
        bottom: -70px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .banner-nav .nav-item {
        font-size: 13px;
        padding: 0 12px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .section-header h2 {
        font-size: 22px;
    }

    .section-header h2::after {
        width: 40px;
        height: 2px;
    }

    .honor-item {
        padding-left: 10px;
    }

    .honor-title {
        font-size: 13px;
        color: #333;
    }

    .honor-badge {
        width: 18px;
        height: 18px;
    }

    .timeline {
        grid-template-columns: 50px 1fr;
        gap: 15px;
    }

    .timeline-items::before {
        left: 25px;
        top: 25px;
        bottom: -15px;
        width: 2px;
    }

    .timeline-year {
        width: 50px;
        height: 50px;
    }

    .year-num {
        font-size: 14px;
    }

    .year-label {
        font-size: 8px;
    }

    .timeline-item {
        padding: 20px 0;
    }

    .timeline-content h3 {
        font-size: 17px;
    }

    .timeline-content p {
        font-size: 13px;
    }

    .timeline-picture {
        width: 100%;
    }

    .timeline-arrows {
        left: 25px;
        bottom: -15px;
    }

    .culture-item {
        align-items: center;
        text-align: center;
    }
}