body {
    background-color: #c0d0e0;
    background-image: url('files/bg.gif');
    background-repeat: repeat;
    font-family: "MS PGothic", "MS Gothic", sans-serif;
    margin: 0;
    padding: 10px;
}
body.lang-zh {
    font-family: "Source Han Sans", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
}
.container {
    width: 760px;
    margin: 0 auto;
}
.header {
    background: linear-gradient(to right, #000080, #0000ff, #4169e1, #87ceeb);
    padding: 20px;
    text-align: center;
    box-shadow: 4px 4px 0px #1e3a8a;
}
.header h1 {
    color: #ffffff;
    font-size: 36px;
    margin: 0;
    text-shadow: 2px 2px 4px #000000;
    letter-spacing: 3px;
}
.subtitle {
    padding: 10px;
    text-align: center;
    font-size: 14px;
    color: #0000ff;
}
.lastupdate {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 8px;
    font-size: 12px;
    font-weight: bold;
}
.whatsnew {
    background-color: #ff0000;
    color: #ffffff;
    padding: 5px 15px;
    border-radius: 50%;
    display: inline-block;
    font-weight: bold;
    font-size: 14px;
    margin: 10px;
    box-shadow: 3px 3px 0px #1e3a8a;
}
.news-section {
    padding: 15px 30px;
    background-color: #ffffff;
    margin: 10px;
    box-shadow: 3px 3px 0px #1e3a8a;
}
.news-item {
    margin: 8px 0;
    font-size: 13px;
}
.news-item::before {
    content: "・";
    color: #ff0000;
    font-weight: bold;
}
.news-date {
    color: #666666;
    font-size: 11px;
}
.menu-title {
    background: linear-gradient(to right, #000080, #0000ff, #4169e1, #87ceeb);
    color: #ffffff;
    padding: 8px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    margin: 15px 10px 10px 10px;
    box-shadow: 4px 4px 0px #1e3a8a;
}
.menu-items {
    display: table;
    width: 100%;
    padding: 10px 0;
}
.menu-row {
    display: table-row;
}
.menu-cell {
    display: table-cell;
    width: 50%;
    padding: 10px 20px;
    vertical-align: top;
}
.menu-button {
    display: flex;
    align-items: center;
    padding: 8px;
    margin: 8px 0;
    background-color: #ffffff;
    box-shadow: 3px 3px 0px #1e3a8a;
    text-decoration: none;
    color: #000000;
}
.menu-button:hover {
    background-color: #e0e8ff;
}
.menu-icon {
    width: 48px;
    height: 48px;
    margin-right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 20px;
    flex-shrink: 0;
}
.menu-text {
    flex: 1;
}
.menu-title-text {
    font-weight: bold;
    font-size: 16px;
    color: #0000ff;
    margin-bottom: 3px;
}
.menu-desc {
    font-size: 12px;
    color: #333333;
}
.footer {
    text-align: center;
    padding: 20px;
    border-top: 2px solid #4169e1;
    margin-top: 15px;
}
.company-logo {
    font-size: 36px;
    font-weight: bold;
    color: #4169e1;
    font-style: italic;
    margin-bottom: 10px;
}
.company-info {
    font-size: 12px;
    line-height: 1.6;
    color: #333333;
}
.copyright {
    font-size: 11px;
    color: #666666;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #cccccc;
    text-align: center;
}
.contact {
    margin-top: 15px;
    padding: 10px;
    background-color: #ffffff;
    box-shadow: 3px 3px 0px #1e3a8a;
}
.link-button {
    display: inline-block;
    margin-top: 10px;
    padding: 5px 15px;
    background-color: #4169e1;
    color: #ffffff;
    text-decoration: none;
    box-shadow: 3px 3px 0px #1e3a8a;
    font-size: 12px;
}
.link-button:hover {
    background-color: #1e3a8a;
}
.page-header {
    background: linear-gradient(to right, #000080, #0000ff, #4169e1, #87ceeb);
    color: #ffffff;
    padding: 15px;
    font-size: 24px;
    font-weight: bold;
    text-align: left;
    margin: 0;
    box-shadow: 4px 4px 0px #1e3a8a;
}
.breadcrumb {
    padding: 10px 15px;
    font-size: 12px;
}
.breadcrumb a {
    color: #0000ff;
    text-decoration: none;
}
.breadcrumb a:hover {
    text-decoration: underline;
}
.content {
    padding: 20px;
}
.back-link {
    text-align: center;
    margin: 30px 0;
}
.back-button {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(to right, #000080, #0000ff, #4169e1, #87ceeb);
    color: #ffffff;
    text-decoration: none;
    box-shadow: 3px 3px 0px #1e3a8a;
    font-weight: bold;
}
.back-button:hover {
    background: linear-gradient(to right, #000060, #0000cc, #2d52b8, #6ab5e0);
}

/* 言語切り替えボタン */
.lang-switcher {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 1000;
    padding: 0;
    font-size: 12px;
}
.lang-link {
    color: #4169e1;
    text-decoration: none;
    cursor: pointer;
    margin: 0 5px;
    font-family: "MS PGothic", "MS Gothic", sans-serif;
}
.lang-link:hover {
    text-decoration: underline;
}
.lang-separator {
    color: #666666;
    margin: 0 3px;
}