:root {
    color-scheme: light dark;
    --back-color: 233, 241, 246;
    --back-color-c: 255, 255, 255;
    --font-color: black;
    --transition-effect: 0.4s cubic-bezier(0.25, 0.46, 0.45, 1.94);
    /* 动画弹性曲线 */
    --sidebar-left: -180px;
    --sidebar-width: 180px;
    --bar-back-op: 1;
}

@media (prefers-color-scheme: dark) {
    :root {
        --back-color: 20, 20, 20;
        --back-color-c: 0, 0, 0;
        --font-color: white;
    }
}


@media (min-width: 1400px) {
    :root {
        --sidebar-left: calc((100vw - 1000px)/2 - 200px);
        --sidebar-width: 200px;
        --bar-back-op: 0.5;
    }
}

html {
    padding: 0;
    -ms-overflow-style: none;
    /* 关滚动条 */
    /* scrollbar-width: none; */
    /* 关滚动条 */
    background-color: rgb(var(--back-color));
    /* 默认浅色背景 */
    color: var(--font-color);
    /* 默认文字颜色 */
    scroll-behavior: smooth;
    /* 添加平滑滚动 */
}

body {
    margin: 0;
    display: flex;
    flex-direction: column;
    /* justify-content: center; */
    /* 垂直居中 */
    align-items: center;
    /*水平居中 */
    min-height: 90vh;
    width: 100vw;
    overflow-x: hidden;
    /* 防止溢出产生横向滚动条 */
    overflow-wrap: break-word;
    word-break: break-word;
    /* 换行允许 */
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
    display: none !important;
    /* 隐藏滚动条 */
}

button,
.bar,
.sidebar {
    -webkit-user-select: none;
    user-select: none;
    /* 关闭复制 */
}

.hidden {
    display: none;
    /* 为隐藏属性的类 */
}

.toutu {
    position: relative;
    width: 100vw;
    max-width: 1000px;
    /* 最大宽度值 */
}

.toutu img {
    width: 100%;
    border-radius: 10px;
    /* 图片圆角 */
}

/* 文章图片 */
.lycimg {
    display: block;
    margin: 1em auto;
    /* 图片居中 */
    max-width: 100%;
    border-radius: 8px;
}

/* 文章视频 */
.lycvideo {
    display: block;
    margin: 1em auto;
    max-width: 100%;
    border-radius: 8px;
}

/* 侧边栏按钮 */
.open-btn {
    font-size: 1.2em;
    cursor: pointer;
    /* 可点击提示 */
    background-color: rgba(51, 51, 51, 0.8);
    color: white;
    padding: 4px 6px;
    border: none;
    position: fixed;
    left: max(10px, calc((100vw - 1000px)/2 + 10px));
    /* 动态left，注意加减号前后的空格 */
    top: 10px;
    z-index: 1;
    border-radius: 5px;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    /* 关闭触摸点击效果 */
}

/* 侧边栏样式 */
.sidebar {
    height: 100%;
    width: var(--sidebar-width);
    position: fixed;
    top: 0;
    left: var(--sidebar-left);
    visibility: hidden;
    background-color: rgba(var(--back-color), var(--bar-back-op));
    padding-top: 40px;
    transition: 0.2s;
    z-index: 3;
}

/* 侧边栏链接样式 */
.sidebar a {
    color: var(--font-color);
    padding: 15px 25px;
    text-decoration: none;
    /* 去下划线 */
    font-size: 18px;
    display: block;
}

.sidebar a:hover {
    background-color: rgba(var(--back-color-c), 0.8);
}

/* 侧边栏激活状态 */
.sidebar.active {
    left: 0;
    opacity: 1;
    visibility: visible;
}

@media (min-width: 1400px) {
    .sidebar {
        opacity: 0;
    }

    .sidebar.active {
        left: var(--sidebar-left);
    }
}

/* 遮罩，关闭侧边栏 */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(var(--back-color), 0.4);
    z-index: 2;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.5s ease, visibility 0s 0.5s;
}

.sidebar.active+.sidebar-overlay {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease;
}

/* 内容文本样式 */
.lyctxt {
    width: 100%;
    max-width: 1000px;
    /* white-space: pre-line; */
    /* 保留换行符 wrap含空格*/
    display: none;
    /* 默认隐藏所有内容区块*/
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(3em);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lyctxt.active {
    display: block;
    /* 激活时显示 */
}

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

.lyctxt a:active {
    color: #6610f2;
}

/* bar相关 */
.bar {
    font-size: 2ex;
    width: 16em;
    height: 3em;
    border: 2px solid #4CAF50;
    border-radius: 8px;
    /* 圆角 */
    background: #d66b00;
    color: #f1f2f3;
    text-align: right;
    line-height: 3em;
    box-shadow: 0 2px 5px rgba(255, 153, 0, 0.3);
    margin: 1em auto;
    /* 外间距 */
    padding: 0em 10px;
    /* 内间距 */
    transition: transform var(--transition-effect);
    /* 弹性曲线 */
}

.bar>button {
    background: #4CAF50;
    color: #f1f2f3;
    border: 1px solid #fd367e;
    box-shadow: 0 2px 8px 4px rgba(253, 54, 126, 0.6);
    border-radius: 8px;
    padding: 0.5em 1em;
    transition: transform var(--transition-effect);
}

/* 悬停时放大 10%，提升阴影高度*/
.bar.active {
    transform: translateY(-0.5em) scale(1.1);
    box-shadow: 0 6px 10px rgba(255, 153, 0, 0.5);
}

.bar>button:hover {
    box-shadow: 0 2px 6px 2px rgba(253, 54, 126, 0.4);
    transform: scale(0.8);
}

/* 代码块容器 */
.code {
    background: #2d2d2d;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin: 0 1.5rem;
    position: relative;
}

/* 代码块样式 */
.code pre {
    padding: 2.5rem 1rem 1rem 0.5rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    position: relative;
    color: white;
    font-family: 'Fira Code', 'Consolas', monospace;
}

/* 代码复制按钮 */
.code .copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

/* 代码高亮 */
pre .comment {
    color: #75715e;
}

pre .string {
    color: #1565c0;
}

pre .legadokey {
    color: #e65100;
}

pre .keychar {
    color: #fb5655;
}

pre .keyword {
    color: #039be5;
}