body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

header .logo {
    width: 50px;
    vertical-align: middle;
}

header h1 {
    display: inline;
    margin-left: 10px;
}

main {
    padding: 20px;
}

section {
    background: #fff;
    margin: 20px 0;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

section h2 {
    cursor: pointer;
    color: #333;
}

section .tooltip {
    display: block;
    color: #888;
    font-size: 0.9em;
}

section img {
    display: block;
    width: 100%;
    height: auto;
    margin-top: 10px;
}

section .content {
    display: none;
}

.section-content {
    background-color: #eef;
    border: 1px solid #ccc;
    padding: 15px;
    border-radius: 5px;
    margin-top: 10px;
}