/* 关于我们页面样式 */

/* 页面头部 */
.page-header {
    background-color: #f8f9fa;
    padding: 60px 0;
    text-align: center;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    color: #333;
    margin-bottom: 20px;
}

.page-subtitle {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 网站介绍 */
.intro-section {
    padding: 80px 0;
    background-color: #fff;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
    position: relative;
}

.intro-text h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: #1890ff;
}

.intro-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
    font-size: 16px;
}

.intro-text ul {
    list-style: none;
    padding: 0;
}

.intro-text ul li {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.intro-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #1890ff;
    font-weight: bold;
}

.intro-image {
    text-align: center;
}

.intro-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* 核心数据 */
.stats-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.stat-item {
    text-align: center;
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: #1890ff;
    margin-bottom: 15px;
}

.stat-label {
    font-size: 20px;
    color: #333;
    font-weight: 600;
    margin-bottom: 15px;
}

.stat-desc {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* 团队介绍 */
.team-section {
    padding: 80px 0;
    background-color: #fff;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.team-member {
    text-align: center;
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #f0f0f0;
}

.team-member:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.member-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 4px solid #e6f7ff;
}

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

.team-member h3 {
    font-size: 22px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.member-title {
    color: #1890ff;
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 20px;
}

.member-desc {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* 发展历程 */
.timeline-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #1890ff;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 60px;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    background-color: #1890ff;
    color: #fff;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 16px;
    position: relative;
    z-index: 2;
}

.timeline-content {
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin: 0 40px;
    flex: 1;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border-style: solid;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: 100%;
    border-width: 10px 10px 10px 0;
    border-color: transparent #fff transparent transparent;
    transform: translateY(-50%);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: 100%;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent #fff;
    transform: translateY(-50%);
}

.timeline-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.timeline-content p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 联系我们 */
.contact-section {
    padding: 80px 0;
    background-color: #fff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    background-color: #e6f7ff;
    color: #1890ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item div {
    flex: 1;
}

.contact-item strong {
    color: #333;
    font-weight: 600;
}

.contact-item a {
    color: #1890ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #40a9ff;
}

.contact-item span {
    color: #666;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e6f7ff;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #1890ff;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    background-color: #1890ff;
    color: #fff;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background-color: #40a9ff;
    transform: translateY(-2px);
}

/* 合作伙伴 */
.partners-section {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    align-items: center;
}

.partner-logo {
    text-align: center;
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.partner-logo:hover {
    transform: translateY(-5px);
}

.partner-logo img {
    max-width: 100%;
    height: auto;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.partner-logo:hover img {
    filter: grayscale(0%);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        margin-left: 30px;
    }
    
    .timeline-date {
        position: absolute;
        left: -60px;
        top: 50%;
        transform: translateY(-50%);
        background-color: #1890ff;
        color: #fff;
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 14px;
    }
    
    .timeline-content {
        margin-left: 0;
        margin-right: 0;
    }
    
    .timeline-content::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 36px;
    }
    
    .page-subtitle {
        font-size: 16px;
    }
    
    .intro-section,
    .stats-section,
    .team-section,
    .timeline-section,
    .contact-section,
    .partners-section {
        padding: 60px 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .stat-item,
    .team-member {
        padding: 30px 20px;
    }
    
    .timeline-item {
        margin-left: 20px;
    }
    
    .timeline-date {
        left: -50px;
        padding: 6px 12px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 40px 0;
    }
    
    .intro-section,
    .stats-section,
    .team-section,
    .timeline-section,
    .contact-section,
    .partners-section {
        padding: 40px 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-item,
    .team-member {
        padding: 20px 15px;
    }
    
    .timeline-item {
        margin-left: 15px;
    }
    
    .timeline-date {
        left: -45px;
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .timeline-content {
        padding: 20px;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .contact-icon {
        align-self: flex-start;
    }
}