body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    padding: 1rem;
}

h1 {
    text-align: center;
    color: #333;
}

ul {
    list-style: none;
    padding: 1rem;
    padding-top: 0;
    padding-bottom: 0;
}

li {
    background-color: #fff;
    border: 1px solid #ddd;
    margin-bottom: 5px;
}

li a {
    box-sizing: border-box;
    display: inline-block;
    width: 100%;
    padding: 1rem;
}

li:hover {
    border: 1px solid #007bff;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

a:visited {
    color: #007bff;
}

hr {
    border: 1px solid #ddd;
}

.logo {
    border: 1px solid #ddd;
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 30%;
}

.logo-container {
    padding-top: 1rem;
}

table,
th,
td {
    border: 1px solid #ddd;
}

.bg-img {
    background-attachment: fixed;
    background-image: url(https://bing.shangzhenyang.com/api/1080p);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    -webkit-filter: blur(10px);
    filter: blur(10px);
    height: 100%;
    left: 0;
    top: 0;
    opacity: .5;
    position: fixed;
    transform: scale(1.1);
    width: 100%;
    z-index: -1
}

.gap-3 {
    display: flex;
    gap: 3px;
    flex-wrap: wrap;
    justify-content: center;
}

.container {
    background-color: #eee;
    max-width: 1000px;
    margin: 0 auto;
    padding-top: 0;
    padding-bottom: 0;
}

.lb-lock {
    padding: 1rem;
}

.fake-window {
    background-color: #fff;
    border: 1px solid #ddd;
}

.menu {
    padding: 3px;
    margin-top: 3px;
    border-bottom: 1px solid #ddd;
}

.menu a {
    color: #444;
    background-color: #eee;
    border: 1px solid #ddd;
    padding: 3.5px 0.5em;
    text-decoration: none;
}

.menu a:hover {
    color: #000;
    background-color: #ddd;
    border: 1px solid #ccc;
    text-decoration: underline;
}

.menu a:visited {
    color: #444;
}

.menu .current {
    color: #000;
    background-color: #fff;
    border-bottom: 1px solid #fff;
}

@media only screen and (min-width: 830px) {
    .menu .current:hover {
        background-color: #fff;
        border-bottom: 1px solid #fff;
        text-decoration: none;
    }
}

.menu .current:visited {
    color: #000;
}

.main-content {
    padding: 1rem;
}

.about {
    text-align: center;
    font-size: small;
    color: gray;
}

.about a {
    color: gray;
}

/* 可折叠元素 */
.collapsible {
    background-color: #888;
    color: white;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
}

.active,
.collapsible:hover {
    background-color: #666;
}

.collapsible:after {
    content: '\002B';
    color: white;
    font-weight: bold;
    float: right;
    margin-left: 5px;
}

.active:after {
    content: "\2212";
}

.collapse-content {
    padding: 0 18px;
    display: none;
    overflow: hidden;
    background-color: #f1f1f1;
}

.tmp-block {
    display: block;
}

/* 可折叠元素结束 */

/* 加载进度条 */
.loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99999;
    opacity: 0;
    transition: opacity .4s linear;

    .progress {
        position: fixed;
        top: 0;
        left: 0;
        width: 0;
        height: 4px;
        background-color: #007bff;
        box-shadow: 0 0 10px rgba(119, 182, 255, .7);
    }

    &.loading {
        opacity: 1;
        transition: none;

        .progress {
            transition: width .4s ease;
        }
    }
}

/* 加载进度条结束 */

@media only screen and (max-width: 830px) {
    .menu a {
        display: inline-block;
        margin: 0;
        border-bottom: 1px solid #ccc;
    }

    .menu .current {
        border-bottom: 1px solid #ccc;
    }

    .menu {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
        padding: .5em;
        margin: 0;
    }
}