/* 页面标题 */
.about-header {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('../images/beijing-1.png');
    background-size: cover;
    background-position: center;
    padding: 60px 0;
    color: white;
    text-align: center;
}

.about-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-family: "STXingkai", "华文行楷", serif;
}

.about-header h1 i {
    margin-right: 15px;
}

.about-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 主要内容 */
.about-container {
    padding: 40px 0;
}

/* 通用部分 */
.about-section {
    padding: 60px 0;
}

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

.section-header h2 {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 15px;
    font-family: "STXingkai", "华文行楷", serif;
}

.section-header p {
    color: #666;
    font-size: 1.1rem;
}

.bg-light {
    background: #f8f9fa;
}

/* 公司简介 */
.about-content h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 20px;
}

.about-content p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.about-features {
    display: flex;
    gap: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.feature-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.feature-content h4 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin: 0;
}

.feature-content p {
    margin: 0;
    color: #666;
}

.about-image {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

/* 发展历程 */
.timeline {
    position: relative;
    padding: 30px 0;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    width: 50%;
    padding-right: 40px;
}

.timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 40px;
}

.timeline-dot {
    position: absolute;
    right: -9px;
    top: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 4px solid white;
}

.timeline-item:nth-child(even) .timeline-dot {
    right: auto;
    left: -11px;
}

.timeline-content {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.timeline-date {
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

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

/* 团队介绍 */
.team-member {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.team-member:hover {
    transform: translateY(-5px);
}

.member-image {
    height: 250px;
    overflow: hidden;
}

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

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

.member-info h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 5px;
}

.member-info .position {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 10px;
}

.member-info .desc {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* 企业优势 */
.advantage-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: rgba(var(--primary-rgb), 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.advantage-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.advantage-item h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 15px;
}

.advantage-item p {
    color: #666;
    margin: 0;
    line-height: 1.6;
}

/* 联系信息 */
.contact-info {
    margin-bottom: 30px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.info-content h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 8px;
}

.info-content p {
    color: #666;
    margin: 0;
}

/* 联系表单 */
.contact-form {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.form-control {
    border: 1px solid #eee;
    padding: 12px;
    border-radius: 6px;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: none;
}

textarea.form-control {
    resize: none;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: var(--primary-dark);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .about-header h1 {
        font-size: 2rem;
    }

    .about-features {
        flex-direction: column;
        gap: 20px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
    }

    .timeline-item:nth-child(even) {
        margin-left: 0;
        padding-left: 50px;
    }

    .timeline-dot {
        left: 11px;
        right: auto;
    }

    .timeline-item:nth-child(even) .timeline-dot {
        left: 11px;
    }

    .member-image {
        height: 200px;
    }

    .advantage-item {
        padding: 20px;
    }

    .advantage-icon {
        width: 60px;
        height: 60px;
    }

    .advantage-icon i {
        font-size: 1.5rem;
    }
}