/* 共通スタイル */
body {
    margin: 0;
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    background-color: #ffffff;
    color: #333333;
}

header {
    background-color: #0a74da;
    color: #ffffff;
    padding: 20px;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2rem;
}

nav {
    text-align: center;
    margin-top: 10px;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

section {
    padding: 40px 20px;
    max-width: 900px;
    margin: 0 auto;
}

section:nth-child(even) {
    background-color: #ffffff;
}

h2 {
    color: #0a74da;
    margin-bottom: 20px;
}

ul {
    list-style-type: disc;
    padding-left: 20px;
}

a.button {
    display: inline-block;
    background-color: #0a74da;
    color: #ffffff;
    padding: 12px 20px;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 20px;
}

footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
    background-color: #f0f0f0;
}