/* 关于页面头部 */
.about-header {
    padding: 8rem 2rem 4rem;
    background: #f9f9f9;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: center;
}

.profile-image {
    position: relative;
}

.profile-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.profile-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #333;
}

.profile-content .subtitle {
    font-size: 1.2rem;
    color: #e67e22;
    margin-bottom: 1.5rem;
}

.profile-content .description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 2rem;
}

/* 专业技能部分 */
.skills-section {
    padding: 5rem 2rem;
    background: #fff;
}

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

.section-container h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-item {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.skill-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
}

.skill-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.skill-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.skill-item p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.skill-level {
    height: 6px;
    background: #f0f0f0;
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: #e67e22;
    width: 0;
    transition: width 1s ease;
}

/* 摄影经历部分 */
.experience-section {
    padding: 5rem 2rem;
    background: #f9f9f9;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: #e67e22;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: #e67e22;
    border-radius: 50%;
}

.timeline-content {
    width: calc(50% - 50px);
    padding: 1.5rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: calc(50% + 50px);
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: calc(50% + 50px);
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: #e67e22;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 0.5rem;
}

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

/* 设备列表部分 */
.equipment-section {
    padding: 5rem 2rem;
    background: #fff;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.equipment-item {
    padding: 2rem;
    background: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.equipment-item h3 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 1.5rem;
}

.equipment-item ul {
    list-style: none;
}

.equipment-item li {
    color: #666;
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.equipment-item li::before {
    content: '•';
    color: #e67e22;
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

/* 证书认证部分 */
.certificates-section {
    padding: 5rem 2rem;
    background: #f9f9f9;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.certificate-item {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.certificate-item img {
    width: 100px;
    height: 100px;
    margin-bottom: 1.5rem;
}

.certificate-item h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 0.5rem;
}

.certificate-item p {
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .profile-content h1 {
        font-size: 2.5rem;
    }

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

    .timeline-dot {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px !important;
    }

    .equipment-grid,
    .certificates-grid {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
.skill-item,
.timeline-content,
.equipment-item,
.certificate-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.skill-item.animate,
.timeline-content.animate,
.equipment-item.animate,
.certificate-item.animate {
    opacity: 1;
    transform: translateY(0);
}