.about-hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
}

.about-hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #000000, #4a4a4a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.about-hero-subtitle {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 30px;
    color: #666666;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.about-hero-button {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(90deg, #4a9fff, #8a64ff);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-hero-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(74, 159, 255, 0.3);
}
 


  

/* 全局样式 */
.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, rgba(74, 159, 255, 0.1), rgba(138, 100, 255, 0.1));
    color: #4a9fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 20px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.section-title {
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, #222, #4a9fff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 25px;
    line-height: 1.1;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 20px;
    color: #666;
    max-width: 800px;
    margin: 40px auto 0;
    line-height: 1.7;
    font-weight: 400;
}

/* 导航指示器 */
.nav-indicator {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.nav-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: rgba(74, 159, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.nav-dot:hover {
    background-color: #4a9fff;
    transform: scale(1.3);
}

.nav-dot.active {
    background-color: #4a9fff;
    transform: scale(1.4);
    box-shadow: 0 0 15px rgba(74, 159, 255, 0.7);
}

.nav-dot::after {
    content: attr(data-section);
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    background-color: #4a9fff;
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 14px;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-dot:hover::after {
    opacity: 1;
}

/* 公司简介部分 - 完全重构的布局 */
.company-profile {
    padding: 150px 5% 100px;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.company-profile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.03"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%234a9fff" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.profile-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    gap: 70px;
    position: relative;
    z-index: 1;
}

/* 左侧文本内容 */
.profile-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.profile-title {
    font-size: 48px;
    color: #222;
    margin-bottom: 35px;
    line-height: 1.2;
    font-weight: 800;
}

.profile-description {
    font-size: 18px;
    line-height: 1.9;
    color: #555;
    margin-bottom: 25px;
    text-align: justify;
}

.profile-description.highlight {
    background: linear-gradient(135deg, rgba(74, 159, 255, 0.05), rgba(138, 100, 255, 0.05));
    border-radius: 12px;
    padding: 25px;
    border-left: 4px solid #4a9fff;
}

/* 右侧内容区域 - 包含图片和特性卡片 */
.profile-side {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.profile-image {
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 35px 70px rgba(0, 0, 0, 0.12);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    height: 400px;
}

.profile-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(74, 159, 255, 0.1), rgba(138, 100, 255, 0.1));
    z-index: 1;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.profile-image:hover {
    transform: translateY(-15px);
    box-shadow: 0 50px 100px rgba(74, 159, 255, 0.2);
}

.profile-image:hover::before {
    opacity: 1;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.7s ease;
}

.profile-image:hover img {
    transform: scale(1.08);
}

/* 特性卡片网格 - 放在图片下方 */
.profile-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.profile-feature {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 25px;
    border-radius: 15px;
    transition: all 0.4s ease;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(74, 159, 255, 0.1);
    height: 100%;
}

.profile-feature:hover {
    background: rgba(74, 159, 255, 0.08);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(74, 159, 255, 0.15);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(74, 159, 255, 0.3);
}

.feature-text h4 {
    font-size: 20px;
    color: #222;
    margin-bottom: 8px;
    font-weight: 700;
}

.feature-text p {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}

/* 树状发展历程时间线 - 修复图标遮挡问题 */
.timeline-section {
    padding: 120px 5%;
    background: linear-gradient(to bottom, #ffffff 0%, #f9f9f9 100%);
    position: relative;
    overflow: hidden;
}

.timeline-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.03"><circle cx="50" cy="50" r="2" fill="%234a9fff"/></svg>');
}

.timeline-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.timeline {
    position: relative;
    margin-top: 80px;
}

/* 中间垂直线 */
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #4a9fff, #8a64ff);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 100px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-content {
    width: 85%;
    max-width: 500px;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
    transition: all 0.5s ease;
    border: 1px solid rgba(200, 200, 200, 0.2);
    position: relative;
}

.timeline-content:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 70px rgba(74, 159, 255, 0.15);
}

/* 左侧项目箭头 */
.timeline-content::before {
    content: '';
    position: absolute;
    top: 40px;
    right: -15px;
    width: 30px;
    height: 30px;
    background: white;
    transform: rotate(45deg);
    border-right: 1px solid rgba(200, 200, 200, 0.2);
    border-bottom: 1px solid rgba(200, 200, 200, 0.2);
}

/* 右侧项目箭头 */
.timeline-item:nth-child(even) .timeline-content::before {
    right: auto;
    left: -15px;
    border-right: none;
    border-left: 1px solid rgba(200, 200, 200, 0.2);
    border-bottom: 1px solid rgba(200, 200, 200, 0.2);
}

/* 时间点圆点 - 修正位置防止与图标重叠 */
.timeline-dot {
    position: absolute;
    top: 40px;
    right: calc(50% - 15px);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    z-index: 2;
    box-shadow: 0 0 20px rgba(74, 159, 255, 0.7);
    transition: all 0.4s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
    box-shadow: 0 0 30px rgba(74, 159, 255, 0.9);
}

.timeline-item:nth-child(even) .timeline-dot {
    right: auto;
    left: calc(50% - 15px);
}

/* 时间点年份 - 确保不被图标遮挡 */
.timeline-year {
    font-size: 36px;
    font-weight: 800;
    color: #4a9fff;
    margin-bottom: 15px;
    display: block;
    position: relative;
    z-index: 3;
}

.timeline-title {
    font-size: 28px;
    color: #222;
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.3;
}

.timeline-description {
    font-size: 17px;
    line-height: 1.8;
    color: #666;
}

/* 修正图标位置，确保不会遮挡年份 */
.timeline-icon {
    position: absolute;
    top: 35px;
    right: calc(50% - 80px); /* 调整位置，远离中间线 */
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    box-shadow: 0 10px 25px rgba(74, 159, 255, 0.3);
    z-index: 1; /* 降低z-index，确保年份在上层 */
}

.timeline-item:nth-child(even) .timeline-icon {
    right: auto;
    left: calc(50% - 80px); /* 调整位置，远离中间线 */
}

/* 团队建设部分 - 优化对齐，去掉成稳部分，调整图片高度 */
.team-building-section {
    padding: 120px 5%;
    background: linear-gradient(135deg, #f8faff 0%, #f0f5ff 100%);
    position: relative;
    overflow: hidden;
}

.team-building-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.03"><polygon points="50,0 100,50 50,100 0,50" fill="none" stroke="%234a9fff" stroke-width="0.5"/></svg>');
}

.team-building-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.team-building-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    margin-top: 50px;
    align-items: start; /* 确保顶部对齐 */
}

.team-text-content {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.team-intro {
    margin-bottom: 50px;
}

.intro-title {
    font-size: 38px;
    color: #222;
    margin-bottom: 30px;
    font-weight: 800;
    line-height: 1.2;
}

.intro-text {
    font-size: 18px;
    line-height: 1.9;
    color: #555;
    margin-bottom: 18px;
    position: relative;
    padding-left: 25px;
}

.intro-text::before {
    content: '•';
    color: #4a9fff;
    font-size: 24px;
    position: absolute;
    left: 0;
    top: 0;
}

.team-belief {
    background: linear-gradient(135deg, rgba(74, 159, 255, 0.1), rgba(138, 100, 255, 0.1));
    border-radius: 20px;
    padding: 35px;
    margin-bottom: 50px;
    border-left: 5px solid #4a9fff;
}

.belief-title {
    font-size: 24px;
    color: #4a9fff;
    margin-bottom: 20px;
    font-weight: 700;
}

.belief-text {
    font-size: 18px;
    line-height: 1.8;
    color: #555;
    font-weight: 500;
}

.team-qualities {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    margin-bottom: 40px;
}

.quality-box {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    text-align: center;
    border: 1px solid rgba(74, 159, 255, 0.1);
    flex: 1;
    min-width: 160px;
}

.quality-box:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.quality-chinese {
    font-size: 28px;
    font-weight: 800;
    color: #4a9fff;
    margin-bottom: 8px;
    display: block;
}

.quality-english {
    font-size: 16px;
    color: #666;
    font-weight: 600;
    letter-spacing: 1px;
}

.team-images {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 35px;
    height: 100%;
}

.team-image-box {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
    transition: all 0.5s ease;
    height: 366px; /* 降低图片高度 */
}

.team-image-box:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.18);
}

.team-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.7s ease;
}

.team-image-box:hover .team-image {
    transform: scale(1.08);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 25px; /* 减小内边距 */
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    color: white;
}

.image-title {
    font-size: 22px; /* 减小字体大小 */
    font-weight: 700;
    margin-bottom: 5px;
}

.image-subtitle {
    font-size: 14px; /* 减小字体大小 */
    opacity: 0.9;
}

/* 技术核心部分 - 4个一行 */
.tech-core-section {
    padding: 100px 5%;
    background: white;
}

.tech-core-container {
    max-width: 1200px;
    margin: 0 auto;
}

.tech-title {
    text-align: center;
    font-size: 44px;
    font-weight: 800;
    color: #222;
    margin-bottom: 40px;
    position: relative;
}

.tech-title::after {
    content: '';
    position: absolute;
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 2px;
}

.tech-vision {
    text-align: center;
    max-width: 950px;
    margin: 0 auto 50px;
    font-size: 20px;
    line-height: 1.8;
    color: #666;
    font-style: italic;
    font-weight: 500;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4个一行 */
    gap: 30px;
    margin-top: 50px;
}

.tech-item {
    background: white;
    border-radius: 20px;
    padding: 35px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(74, 159, 255, 0.1);
    transition: all 0.4s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.tech-item:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 20px 50px rgba(74, 159, 255, 0.12);
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 32px;
    box-shadow: 0 12px 30px rgba(74, 159, 255, 0.25);
    transition: all 0.4s ease;
}

.tech-item:hover .tech-icon {
    transform: scale(1.1) rotate(10deg);
}

.tech-item h3 {
    font-size: 24px;
    color: #222;
    margin-bottom: 15px;
    font-weight: 700;
    width: 100%;
}

.tech-item p {
    font-size: 16px;
    color: #666;
    line-height: 1.7;
    flex-grow: 1;
    width: 100%;
}

/* 企业文化部分 - 优化对齐 */
.culture-section {
    padding: 120px 5%;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.culture-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.03"><rect x="10" y="10" width="80" height="80" fill="none" stroke="%234a9fff" stroke-width="0.5"/></svg>');
}

.culture-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
    margin-top: 70px;
}

.culture-card {
    background: white;
    border-radius: 20px;
    padding: 45px 35px;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
    border: 1px solid rgba(74, 159, 255, 0.1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.culture-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
}

.culture-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(74, 159, 255, 0.15);
}

.culture-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: white;
    font-size: 36px;
    box-shadow: 0 15px 30px rgba(74, 159, 255, 0.25);
    transition: all 0.4s ease;
}

.culture-card:hover .culture-icon {
    transform: scale(1.1) rotate(5deg);
}

.culture-card h3 {
    font-size: 26px;
    color: #222;
    margin-bottom: 20px;
    font-weight: 700;
    width: 100%;
}

.culture-card p {
    font-size: 17px;
    line-height: 1.7;
    color: #666;
    flex-grow: 1;
    width: 100%;
}

/* 可持续发展战略 - 4个一行 */
.sustainability-section {
    padding: 120px 5%;
    background: linear-gradient(135deg, #e6f7ff 0%, #f0f9ff 100%);
    position: relative;
    overflow: hidden;
}

.sustainability-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.03"><path d="M50,10 A40,40 0 1,1 50,90 A40,40 0 1,1 50,10 Z" fill="none" stroke="%234a9fff" stroke-width="0.5"/></svg>');
}

.sustainability-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4个一行 */
    gap: 30px;
    margin-top: 70px;
}

.strategy-card {
    background: white;
    border-radius: 20px;
    padding: 50px 30px; /* 调整内边距 */
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(74, 159, 255, 0.1);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.strategy-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(74, 159, 255, 0.15);
}

.strategy-number {
    display: inline-block;
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    color: white;
    border-radius: 50%;
    line-height: 70px;
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 30px;
    box-shadow: 0 15px 30px rgba(74, 159, 255, 0.25);
    transition: all 0.4s ease;
}

.strategy-card:hover .strategy-number {
    transform: scale(1.1) rotate(10deg);
}

.strategy-card h3 {
    font-size: 26px;
    color: #222;
    margin-bottom: 20px;
    font-weight: 700;
    width: 100%;
}

.strategy-card p {
    font-size: 17px;
    line-height: 1.7;
    color: #666;
    flex-grow: 1;
    width: 100%;
}

/* 合作伙伴部分 - 优化对齐 */
.partners-section {
    padding: 120px 5%;
    background: white;
    position: relative;
    overflow: hidden;
}

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

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 45px;
    margin-top: 70px;
    align-items: center;
}

.partner-card {
    background: white;
    border-radius: 15px;
    padding: 35px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    border: 1px solid rgba(74, 159, 255, 0.1);
}

.partner-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(74, 159, 255, 0.15);
}



/* 响应式设计 */
@media (max-width: 1200px) {
    .section-title {
        font-size: 48px;
    }
    
    .profile-title {
        font-size: 42px;
    }
    
    .intro-title {
        font-size: 34px;
    }
    
    .tech-title {
        font-size: 38px;
    }
    
    /* 在中等屏幕上调整图标位置 */
    .timeline-icon {
        right: calc(50% - 70px);
    }
    
    .timeline-item:nth-child(even) .timeline-icon {
        left: calc(50% - 70px);
    }
    
    /* 在大屏幕上调整4个一行的布局 */
    .tech-grid,
    .strategy-grid {
        grid-template-columns: repeat(2, 1fr); /* 中等屏幕改为2个一行 */
    }
}

@media (max-width: 1024px) {
    .profile-container {
        flex-direction: column;
        gap: 50px;
    }
    
    .profile-side {
        width: 100%;
    }
    
    .section-title {
        font-size: 44px;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        padding-right: 0;
        padding-left: 70px;
        justify-content: flex-start;
    }
    
    .timeline-item:nth-child(even) {
        padding-left: 70px;
    }
    
    .timeline-dot {
        right: auto;
        left: 20px;
    }
    
    .timeline-icon {
        display: none; /* 在平板设备上隐藏图标 */
    }
    
    .timeline-content::before {
        right: auto;
        left: -15px;
        border-right: none;
        border-left: 1px solid rgba(200, 200, 200, 0.2);
        border-bottom: 1px solid rgba(200, 200, 200, 0.2);
    }
    
    .team-building-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .team-images {
        grid-template-rows: 220px 220px;
    }
    
    .tech-grid,
    .strategy-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 38px;
    }
    
    .section-subtitle {
        font-size: 18px;
    }
    
    .profile-features {
        grid-template-columns: 1fr;
    }
    
    .profile-image {
        height: 350px;
    }
    
    .team-image-box {
        height: 200px;
    }
    
    .timeline-year {
        font-size: 32px;
    }
    
    .timeline-title {
        font-size: 24px;
    }
    
    .timeline-content {
        padding: 30px;
    }
    
    .culture-grid,
    .tech-grid,
    .strategy-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 32px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .profile-title {
        font-size: 34px;
    }
    
    .profile-description {
        font-size: 16px;
    }
    
    .intro-title {
        font-size: 28px;
    }
    
    .quality-chinese {
        font-size: 24px;
    }
    
    .tech-title {
        font-size: 32px;
    }
    
    .culture-card h3,
    .strategy-card h3 {
        font-size: 22px;
    }
    
    .timeline-content {
        padding: 25px;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .team-image-box {
        height: 180px;
    }
}










   /* 主容器 */
   .contact-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 80px;
}

/* 渐变蓝色背景部分 */
.contact-hero {
    background: linear-gradient(135deg, #4a9fff 0%, #8a64ff 100%);
    color: white;
    padding: 120px 20px 100px;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100" height="100" opacity="0.05"><circle cx="50" cy="50" r="40" fill="none" stroke="white" stroke-width="0.5"/><line x1="10" y1="10" x2="90" y2="90" stroke="white" stroke-width="0.3"/><line x1="90" y1="10" x2="10" y2="90" stroke="white" stroke-width="0.3"/></svg>');
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.contact-subtitle {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    opacity: 0.9;
}

#contact-title {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

#contact-title strong {
    font-weight: 700;
}

.contact-tagline {
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 40px;
    opacity: 0.9;
    font-weight: 300;
}

/* 联系信息卡片 */
.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 60px auto 0;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.3);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 24px;
}

.contact-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    font-weight: 600;
}

.contact-card p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 5px;
}

.contact-link {
    color: white;
    text-decoration: none;
    display: inline-block;
    margin-top: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
}

.contact-link:hover {
    border-bottom-color: white;
}

/* 快速响应板块 */
.quick-response-section {
    padding: 100px 20px;
    background: linear-gradient(135deg, #f8faff 0%, #f0f5ff 100%);
}

.quick-response-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.response-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.response-item {
    background: white;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.4s ease;
    border: 1px solid rgba(74, 159, 255, 0.1);
}

.response-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(74, 159, 255, 0.1);
}

.response-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 32px;
}

.response-item h3 {
    font-size: 22px;
    color: #222;
    margin-bottom: 15px;
    font-weight: 600;
}

.response-item p {
    font-size: 15px;
    line-height: 1.6;
    color: #666;
    margin-bottom: 20px;
}

.response-time {
    font-size: 18px;
    font-weight: 600;
    color: #4a9fff;
    background: rgba(74, 159, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    display: inline-block;
}

/* 联系表单部分 */
.contact-form-section {
    padding: 100px 20px;
    background: #fff;
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
}

#form-title {
    text-align: center;
    font-size: 36px;
    font-weight: 300;
    margin-bottom: 50px;
    color: #222;
}

#form-title strong {
    font-weight: 700;
    color: #4a9fff;
}

.contact-form {
    background: #fff;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(74, 159, 255, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-control {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-control:focus {
    outline: none;
    border-color: #4a9fff;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(74, 159, 255, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 30px;
}

.form-checkbox input {
    margin-top: 5px;
}

.form-checkbox label {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.checkbox-link {
    color: #4a9fff;
    text-decoration: none;
}

.checkbox-link:hover {
    text-decoration: underline;
}

.submit-btn {
    background: linear-gradient(135deg, #4a9fff, #8a64ff);
    color: white;
    border: none;
    padding: 18px 50px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: block;
    margin: 0 auto;
    min-width: 200px;
    letter-spacing: 1px;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(74, 159, 255, 0.3);
}

/* 常见问题板块 */
.faq-section {
    padding: 100px 20px;
    background: white;
}

.faq-container {
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid rgba(74, 159, 255, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: rgba(74, 159, 255, 0.3);
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 18px;
    font-weight: 600;
    color: #222;
}

.faq-question i {
    transition: transform 0.3s ease;
    color: #4a9fff;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 30px 25px;
    max-height: 200px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    #contact-title, #form-title {
        font-size: 40px;
    }
}

@media (max-width: 768px) {
    .contact-hero {
        padding: 80px 20px;
    }
    
    #contact-title, #form-title {
        font-size: 32px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-form {
        padding: 30px;
    }
    
    .contact-form-section,
    .quick-response-section,
    .faq-section {
        padding: 60px 20px;
    }
    
    .nav-links {
        gap: 15px;
    }
}

@media (max-width: 480px) {
    #contact-title, #form-title {
        font-size: 28px;
    }
    
    .contact-tagline {
        font-size: 16px;
    }
    
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .navbar-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.contact-card,
.contact-form,
.response-item,
.faq-item {
    animation: fadeInUp 0.8s ease forwards;
}

.contact-card:nth-child(1) { animation-delay: 0.1s; }
.contact-card:nth-child(2) { animation-delay: 0.2s; }
.contact-card:nth-child(3) { animation-delay: 0.3s; }