:root {
    --primary-color: #0066cc;
    --secondary-color: #333;
    --accent-color: #ff6b00;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --text-color: #444;
    --text-light: #777;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

.about-us-main {
    width: 100%; /* 新增100%宽度 */
    margin: calc(var(--nav-height)) auto 0px;
    transition: margin-top 0.3s ease;
    flex: 1;
}

/* 默认的 :root 变量 */
@media (min-width: 769px) {
    :root {
      --nav-height: 70px;
      --footer-height: 60px;
    }
  }

/* 统一各版块container样式 */
/* .company-intro .container,
.core-values .container,
.video-presentation .container,
.leadership-team .container,
.company-timeline .container,
.certification-section .container {
    max-width: 1200px;
    margin: 0 auto;
} */


/* 企业简介部分 */
.company-intro {
    background-color: white;
}

.company-intro .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
    width: 100%;
    flex-direction: column;
}

.intro-content {
    display: flex;
    align-items: center;
    flex: 1;
    max-width: 1200px;
}

@media (min-width: 769px) {
    .intro-content {
        height: 100%;
        align-items: stretch;
    }
    .intro-text {
        flex-grow: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
}

.intro-text p:not(:last-child) {
    margin-bottom: 0;
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    word-wrap: break-word;
    text-align: left;
    text-indent: 2em;
    display: flex;
    align-items: center;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.intro-image {
    flex: 1;
    min-width: 300px;
    position: relative;
    width: 1200px;
}

.carousel-container {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
    width: 100%;
}

.carousel-track img {
    flex: 0 0 100%;
    min-width: 100%;
    border-radius: var(--border-radius);
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    position: absolute;
    top: 0;
    left: 0;
}

.carousel-track img.active {
    opacity: 1;
    position: relative;
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.8);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.carousel-arrow.prev {
    left: 20px;
}

.carousel-arrow.next {
    right: 20px;
}

.carousel-arrow:hover {
    background: var(--primary-color);
    color: white;
}

.intro-image img {
    width: 100%;
    border-radius: var(--border-radius);
    transition: var(--transition);
}



.image-caption {
    position: absolute;
    text-align: center;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 15px;
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    font-size: 0.9rem;
}

/* 核心价值部分 */
.core-values {
    padding: 60px 0;
    background-color: white;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.value-card {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.value-card h3 {
    margin-bottom: 15px;
    word-wrap: break-word;
    overflow-wrap: break-word;
    color: var(--secondary-color);
}

.value-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 视频展示部分 */
.video-presentation {
    padding: 60px 0;
    background-color: white;
}

.video-presentation .container {
    width: 100%;
    max-width: 1200px;
    padding: 0;
    margin: 0;
    overflow: hidden;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

.video-container {
    width: 100%;
    margin: 0;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    transform: scale(1.02);
}

.video-description {
    width: 100%;
    padding: 20px 0;
    gap: 15px;
    margin: 20px 0;
    color: #333;
    line-height: 1.6;
    text-align: center;
    font-weight: bold;  /* 新增字体加粗 */
}

.video-description p {
    display: inline;
}

/* .video-description .btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 0px;
} */

@media (max-width: 768px) {
    .video-description {
        flex-direction: column;
    }
    
    .video-description p {
        margin-right: 0;
        margin-bottom: 10px;
    }
}

/* 领导团队部分 */
.leadership-team {
    text-align: center;
    padding-top: 80px;
    padding-bottom: 80px;
}

.team-slider {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.team-member {
    width: calc(33.333% - 20px);
    min-width: 250px;
    flex: 1 1 calc(33.333% - 20px);
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    padding: 60px 0;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.member-photo {
    position: relative;
}

.member-photo img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
    .about-us-main {
        padding: 0 20px;
    }

    .member-photo img {
        width: 80px;
        height: 80px;
    }
}

/* .social-links {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
} */

.member-info {
    padding: 20px;
    text-align: center;
}

.member-info h3 {
    margin-bottom: 1.2rem;
}

.member-info .position {
    margin-bottom: 1rem;
}

.member-info .bio {
    margin-bottom: 1.5rem;
}

.position {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.bio {
    color: var(--text-light);
    font-size: 1rem;
}

/* 时间轴部分 */
.company-timeline {
    padding: 60px 0;
    background-color: white;
}

.timeline {
    position: relative;
    max-width: 1200px;
    margin: 50px auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--light-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    max-width: 1200px;
}

.timeline-year {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 500;
    margin-bottom: 15px;
}

.timeline-content {
    width: calc(50% - 30px);
    padding: 20px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: auto;
}

.timeline-content h3 {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.company-timeline .timeline-content p {
    line-height: 1.6;
    color: #666;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
}

@media (max-width: 768px) {
    .company-timeline .timeline-content p,
    .company-timeline .timeline-content h3,
    .values-grid .value-card h3 {
        hyphens: auto;
        -webkit-hyphens: auto;
        -ms-hyphens: auto;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
}

/* 体系认证部分 */
.certification-section {
    padding: 60px 0;
    background: white;
}

.certification-grid {
    display: flex;
    gap: 30px;
    margin-top: 50px;
    justify-content: center;
}

.certification-card {
    flex: 1;
    max-width: 500px;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.certification-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.certification-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
}

@media (max-width: 768px) {
    .certification-grid {
        flex-direction: column;
    }
    
    .certification-card {
        max-width: 100%;
        margin-bottom: 20px;
    }
}


/* 移动端响应式调整 */
@media (max-width: 768px) {
  .intro-image {
    max-width: 100%;
  }
  
  .carousel-container {
    overflow: hidden;
    border-radius: 8px;
  }
  
  .carousel-track img {
    width: 100%;
    height: auto;
    min-width: unset;
  }
  
  .image-caption {
    font-size: 0.8rem;
    padding: 8px 10px;
  }
}

@media (min-width: 769px) {
  .company-intro,
  .core-values,
  .video-presentation,
  .company-timeline,
  .certification-section {
    /* padding-top: 80px; */
    padding-bottom: 80px;
  }

  .core-values {
    background-color: #f5f5f5;
  }

  .certification-section {
    background-color: #f5f5f5;
  }

  .leadership-team:nth-child(even) {
    background-color: #f5f5f5;
  }
}