* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    color: #333;
}

.banner {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: #dceeff;
}

.banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.menu {
    width: 100%;
    display: flex;
    justify-content: center;
    background: white;
    border-bottom: 1px solid #ddd;
}

.menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 18px 35px;
    text-decoration: none;
    color: #333;
    font-size: 18px;
    font-weight: bold;
}

.menu a:hover {
    background: #f0f0f0;
}

.menu a.active {
    background: #4caf50;
    color: white;
}

.menu a img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.content {
    max-width: 1200px;
    margin: 40px auto;
    padding: 30px;
    background: white;
    border-radius: 12px;
    min-height: 500px;
}

.content h1 {
    margin-top: 0;
}