/* About Page Specific Styles */

/* Hero Banner Section */
.about-hero-banner {
    position: relative;
    width: 100%;
    margin-top: 80px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    margin-bottom: 0;
}

.about-banner-container {
    width: 100%;
    max-width: 1920px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto;
}

.about-hero-image {
    width: 100%;
    max-width: 1920px;
    height: auto;
    display: block;
    object-fit: contain;
}

/* History Section */
.about-history-section {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    margin-top: 20px;
    margin-bottom: 0;
}

.about-history-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.about-history-image {
    width: 75%;
    max-width: 1440px; /* 1920 的 75% */
    height: auto;
    display: block;
    object-fit: contain;
}

/* Text Image Section */
.about-text-img-section {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    margin-top: 3%;
    margin-bottom: 0;
}

.about-text-img-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-text-img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Timeline Section */
.about-timeline-section {
    width: 100%;
    padding: 60px 20px;
    background: #fff;
    text-align: center;
}

.about-timeline-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-timeline-title {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 48px;
    font-weight: 700;
    color: #333;
    margin-bottom: 50px;
}

.about-timeline-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.about-timeline-arrow {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    transition: opacity 0.3s;
}

.about-timeline-arrow:hover {
    opacity: 0.7;
}

.about-timeline-arrow img {
    width: auto;
    height: auto;
    max-width: 100%;
    display: block;
}

.about-timeline-text {
    flex: 1;
    min-width: 300px;
    max-width: 800px;
}

.timeline-line1 {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 36px;
    font-weight: 700;
    color: #8B0000; /* 与左右箭头/时间线当前节点同色 */
    margin-bottom: 12px;
    line-height: 1.3;
    text-align: center;
}

.timeline-line2,
.timeline-line3 {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 18px;
    color: #333;
    line-height: 1.8;
    text-align: center;
}

.about-timeline-progress {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 40px;
}

.about-year-wrap {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

.about-year-image {
    max-width: 100%;
    height: auto;
    display: block;
}

.about-timeline-nodes {
    position: absolute;
    left: 0;
    top: calc(100% + 1px);
    width: 100%;
    height: 16px;
    pointer-events: auto;
}

.timeline-node {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 14px;
    color: #333;
    cursor: pointer;
    transition: all 0.3s;
    position: absolute;
    transform: translateX(-50%);
    padding: 1px 4px;
    line-height: 1;
    white-space: nowrap;
}

/* 按进度条图片中 5 个图标的中心点对齐（可微调百分比） */
.about-timeline-nodes .timeline-node:nth-child(1) { left: 10%; }
.about-timeline-nodes .timeline-node:nth-child(2) { left: 30%; }
.about-timeline-nodes .timeline-node:nth-child(3) { left: 50%; }
.about-timeline-nodes .timeline-node:nth-child(4) { left: 70%; }
.about-timeline-nodes .timeline-node:nth-child(5) { left: 90%; }

.timeline-node.active {
    font-size: 18px;
    font-weight: 700;
    color: #8B0000;
}

/* Center Image Section */
.about-center-img-section {
    width: 100%;
    margin-top: 5%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    overflow: hidden;
}

.about-center-img-container {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-center-image {
    width: 80%;
    max-width: 576px;
    height: auto;
    display: block;
    object-fit: contain;
}

.about-center-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 10;
}

.about-center-text {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

/* Achievements Section */
.about-achievements-section {
    width: 100%;
    padding: 60px 20px;
    background: #fff;
    text-align: center;
}

.about-achievements-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-achievements-title {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 48px;
    font-weight: 700;
    color: #333;
    margin-bottom: 50px;
}

.about-achievements-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.about-achievements-list p {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 18px;
    color: #333;
    line-height: 0.8;
    text-align: center;
    margin: 0;
}

/* Banner 3 Section */
.about-banner3-section {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    overflow: hidden;
}

.about-banner3-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-banner3-image {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Mission Section */
.about-mission-section {
    width: 100%;
    padding: 40px 20px;
    background: #fff;
    text-align: center;
}

.about-mission-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-mission-text {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 20px;
    font-weight: 700;
    color: #333;
    line-height: 1.8;
    text-align: center;
    margin: 0;
}

/* Details Section */
.about-details-section {
    width: 100%;
    padding: 10px 20px;
    background: #fff;
    text-align: center;
}

.about-details-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-details-container p {
    font-family: 'Noto Serif SC', '思源宋体', serif;
    font-size: 18px;
    color: #333;
    line-height: 1.2;
    text-align: center;
    margin: 0;
}

/* Decorative Section */
.about-decorative-section {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    padding: 40px 20px;
}

.about-decorative-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-decorative-image {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* 移动端样式 */
@media (max-width: 800px) {
    .about-hero-banner {
        margin-top: 60px;
    }

    .about-timeline-title {
        font-size: 32px;
        margin-bottom: 30px;
    }

    .about-timeline-content {
        gap: 15px;
        margin-bottom: 30px;
        flex-wrap: nowrap; /* 与 PC 一致：左右箭头与内容同一行 */
    }

    .about-timeline-arrow {
        flex-shrink: 0;
    }

    .about-timeline-text {
        min-width: 0; /* 允许中间内容收缩，与箭头保持一行 */
        flex: 1;
    }

    .timeline-line1 {
        font-size: 28px;
    }

    .timeline-line2,
    .timeline-line3 {
        font-size: 18px;
    }

    .about-timeline-nodes {
        top: calc(100% + 1px);
        height: 16px;
    }

    .timeline-node {
        font-size: 12px;
    }

    .timeline-node.active {
        font-size: 14px;
    }

    .about-center-text {
        font-size: 24px;
        white-space: normal;
        padding: 0 20px;
    }

    .about-achievements-title {
        font-size: 32px;
        margin-bottom: 30px;
    }

    .about-achievements-list p {
        font-size: 12pt;
    }

    .about-mission-text {
        font-size: 22pt;
    }

    .about-details-container p {
        font-size: 12pt;
    }
}