header {
    background: linear-gradient(to right, #2c3e50, #4a6491);
    color: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: cover;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.intro {
    background: white;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
    line-height: 1.8;
}

.intro p {
    margin-bottom: 15px;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto 50px;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 6px;
    background-color: #3498db;
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -3px;
    border-radius: 10px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    box-sizing: border-box;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: white;
    border: 4px solid #3498db;
    border-radius: 50%;
    top: 15px;
    z-index: 1;
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid white;
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent white;
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid white;
    border-width: 10px 10px 10px 0;
    border-color: transparent white transparent transparent;
}

.right::after {
    left: -10px;
}

.left::after {
    right: -10px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px);
}

.timeline-year {
    font-weight: bold;
    font-size: 1.5rem;
    color: #3498db;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.timeline-year i {
    margin-right: 10px;
    font-size: 1.8rem;
}

.timeline-content h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.timeline-content p {
    margin-bottom: 10px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 50px 0;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 15px;
}

.stat-card h3 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

.stat-card p {
    color: #7f8c8d;
}

.key-people {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.key-people h2 {
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 2px solid #f39c12;
}

.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.person {
    display: flex;
    align-items: flex-start;
}

.person-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #3498db;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin-right: 20px;
    flex-shrink: 0;
}

.person-info h3 {
    color: #2c3e50;
    margin-bottom: 5px;
}

.person-info p {
    color: #7f8c8d;
    font-style: italic;
    margin-bottom: 10px;
}

@media screen and (max-width: 768px) {
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::before {
        left: 60px;
        border: medium solid white;
        border-width: 10px 10px 10px 0;
        border-color: transparent white transparent transparent;
    }

    .left::after, .right::after {
        left: 21px;
    }

    .right {
        left: 0%;
    }
}