/* 关于我们页面样式 */
.about-header {
    background: var(--gradient-primary);
    padding: 4rem 0;
    text-align: center;
    color: white;
}

.about-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 使命部分 */
.mission-section {
    padding: 4rem 0;
    background: white;
}

.mission-content {
    text-align: center;
}

.mission-content h2 {
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.mission-card {
    padding: 2rem;
    border-radius: var(--radius-lg);
    background: var(--bg-color);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.mission-card:hover {
    transform: translateY(-10px);
}

.mission-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

/* 发展历程 */
.history-section {
    padding: 4rem 0;
    background: var(--bg-color);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 3rem auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--secondary-color);
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    padding: 2rem 0;
}

.timeline-date {
    width: 120px;
    text-align: right;
    padding-right: 2rem;
    font-weight: bold;
    color: var(--secondary-color);
}

.timeline-content {
    width: calc(50% - 60px);
    padding-left: 2rem;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-color);
}

/* 团队介绍 */
.team-section {
    padding: 4rem 0;
    background: white;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-member {
    text-align: center;
}

.team-member img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin-bottom: 1rem;
}

.position {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* 联系我们 */
.contact-section {
    padding: 4rem 0;
    background: var(--bg-color);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: var(--radius-md);
}

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

/* 响应式设计 */
@media (max-width: 992px) {
    .mission-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mission-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item {
        flex-direction: column;
    }

    .timeline-date {
        width: auto;
        text-align: left;
        padding-left: 2rem;
    }

    .timeline-content {
        width: auto;
        margin-left: 2rem;
    }
}