body {
    background-color: #1a1a1a;
    color: #ffffff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    max-width: 1200px; /* 限制最大寬度 */
    margin: 0 auto; /* 置中 */
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    width: 100px; /* 隤踵㟲 logo 憭批�� */
    margin-bottom: 20px;
    background-color: rgba(255, 255, 255, 0.2); /* 鈭株𠧧��枏耦摨𤏪��葆��厰�𤩺�擧���� */
    border-radius: 50%; /* ��枏耦 */
    padding: 10px; /* 隤踵㟲��枏耦摨閧��扯�� */
}

.links {
    text-align: center;
    margin-bottom: 30px;
}

.content-section {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease-in-out, visibility 0.5s ease-in-out;
    position: absolute;
    width: calc(100% - 40px); /* 考慮 padding */
    max-width: 800px; /* 限制內容區塊最大寬度 */
    background-color: #2d2d2d;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    top: 0;
    left: 50%;
    transform: translateX(-50%); /* 水平置中 */
}

.content-section.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

.nav-btn {
    display: inline-block;
    background-color: #333;
    color: #e0e0e0;
    padding: 15px 30px;
    text-decoration: none;
    margin: 0 10px;
    border-radius: 5px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.nav-btn:hover {
    background-color: #2d2d2d;
    border-color: #555;
    color: #ffffff;
}

.nav-btn.active {
    background-color: #2d2d2d;
    border-color: #666;
    color: #ffffff;
}

.content-container {
    position: relative;
    min-height: 300px;
    margin: 20px auto; /* 修改為 auto 以置中 */
    padding-bottom: 50px;
    max-width: 800px; /* 與 content-section 相同的最大寬度 */
}

footer {
    text-align: center;
    margin-top: 50px;
    color: #888888;
}