@font-face {
    font-family: "Consolas";
    src: url("../font/consola.ttf");
}

html {
    color: #333333;
    background: #ffffff;
    scroll-behavior: smooth;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-family: Consolas, "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB",
        "WenQuanYi Micro Hei", sans-serif;
}
body {
    max-width: 680px;
    padding: 0 14px;
    margin: 0 auto;
}
body::-webkit-scrollbar {
    display: none;
}
* {
    -webkit-tap-highlight-color: transparent;
}
ol,
ul {
    list-style: none;
}
p,
h1,
h2,
h3,
h4,
h5,
ul,
ol,
li,
blockquote {
    padding: 0;
    margin: 0;
}
a {
    color: inherit;
    text-decoration: none;
}
input,
select,
textarea {
    font-family: inherit;
    outline: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: none;
}
pre,
code {
    font-family: inherit;
}
input:-webkit-autofill {
    /* 自动填充的文本颜色 */
    -webkit-text-fill-color: #333333 !important;
    /* -webkit-text-fill-color: var(--text-color) !important; */

    /* 方式1：使用内阴影覆盖自动填充的背景色 */
    /* box-shadow: 0 0 0 1000px #ffffff inset !important; */

    /* 方式2：通过延迟一个月，取消自动填充的背景色 */
    -webkit-transition: background-color 2592000s ease-in-out 0s;
    transition: background-color 2592000s ease-in-out 0s;
}
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
    background-color: transparent;
}
::-webkit-scrollbar-thumb {
    border-radius: 2px;
    background-color: #999999;
}
::-moz-selection {
    background-color: #4a4a4a;
    color: #f9f9f9;
}
::selection {
    background-color: #4a4a4a;
    color: #f9f9f9;
}
::-moz-selection {
    background-color: #4a4a4a;
    color: #f9f9f9;
}
.hover-underline {
    position: relative;
}
.hover-underline:after {
    content: "";
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: #333333;
    visibility: hidden;
    transform: scaleX(0);
    transition: transform 200ms ease-in-out;
}
.hover-underline:hover:after {
    visibility: visible;
    transform: scaleX(1);
}
.header {
    padding: 40px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.header .logo {
    width: 40px;
    height: 40px;
    cursor: pointer;
    border-radius: 50%;
    flex-shrink: 0;
    margin-right: 10px;
    -webkit-user-select: none;
    user-select: none;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
    transition: transform 500ms ease-in-out;
}
.header .logo:hover {
    transform: rotate(360deg);
}
.header .menu {
    margin-right: -9px;
    text-align: right;
}
.header .menu a {
    display: inline-block;
    font-size: 16px;
    margin: 4px 9px;
    white-space: nowrap;
}
.footer {
    padding: 15px 0;
    font-size: 14px;
}
.footer a {
    text-decoration: underline;
    color: #000000;
    padding: 0 4px;
    white-space: nowrap;
}
#to-top {
    position: fixed;
    z-index: 99;
    right: 16px;
    bottom: 12px;
    width: 34px;
    height: 34px;
    cursor: pointer;
    border-radius: 10%;
    background-color: #000000;
    opacity: 0.45;
    overflow: hidden;
    transform: translateY(66px);
    transition: transform 200ms ease-in-out;
}
#to-top.show {
    transform: translateY(0);
}
#to-top > span {
    display: block;
    width: 50%;
    height: 50%;
    position: absolute;
    left: 50%;
    top: 13px;
    transform: translateX(-50%) rotate(45deg);
}
#to-top > span:first-child {
    background-color: #ffffff;
}
#to-top > span:last-child {
    background-color: #000000;
    transform: translate(-50%, 16%) rotate(45deg);
}
@media screen and (max-width: 560px) {
    .header {
        padding: 35px 0 20px 0;
        justify-content: flex-start;
    }
    .header .menu {
        margin-right: -2px;
        text-align: left;
    }
    .header .menu a {
        margin: 2px 5px;
        font-size: 15px;
    }
}
/* KaTeX related */
.newline {
    height: 0.5em;
}