/* 关于我们页面样式 */
.about-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

.about-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.about-hero p {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.about-content {
    padding: 80px 0;
}

.about-section {
    margin-bottom: 80px;
}

.about-section h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 30px;
    text-align: center;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #7f8c8d;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #3498db;
    margin-bottom: 10px;
    display: block;
}

.stat-label {
    font-size: 1.1rem;
    color: #2c3e50;
    font-weight: 500;
}

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

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2980b9);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 25px;
}

.feature-card h3 {
    color: #2c3e50;
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: #7f8c8d;
    line-height: 1.6;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.team-member {
    background: white;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.member-avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    margin: 0 auto 20px;
}

.member-name {
    font-size: 1.3rem;
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 5px;
}

.member-role {
    color: #3498db;
    font-weight: 500;
    margin-bottom: 15px;
}

.member-bio {
    color: #7f8c8d;
    font-size: 0.95rem;
    line-height: 1.5;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 60px auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #3498db;
    transform: translateX(-50%);
}

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

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 40px;
    text-align: right;
}

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

.timeline-content {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content::after {
    content: '';
    position: absolute;
    right: -10px;
    top: 20px;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-left-color: white;
}

.timeline-item:nth-child(even) .timeline-content::after {
    content: '';
    position: absolute;
    left: -10px;
    top: 20px;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-right-color: white;
}

.timeline-date {
    color: #3498db;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.timeline-title {
    color: #2c3e50;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.timeline-desc {
    color: #7f8c8d;
    line-height: 1.6;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background: #3498db;
    border-radius: 50%;
    top: 20px;
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -48px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -48px;
}

.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    margin-top: 80px;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: white;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    background: #e74c3c;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.cta-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
}

.cta-button i {
    margin-right: 10px;
}

@media (max-width: 768px) {
    .about-hero h1 {
        font-size: 2.5rem;
    }

    .stats-grid,
    .features-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

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

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

    .timeline-content::after {
        display: none;
    }

    .timeline-dot {
        left: 12px !important;
        right: auto !important;
    }
}