/*! normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */

/* Document
   ========================================================================== */

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */

html {
    line-height: 1.15; /* 1 */
    -webkit-text-size-adjust: 100%; /* 2 */
}

/* Sections
   ========================================================================== */

/**
 * Remove the margin in all browsers.
 */

body {
    margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */

main {
    display: block;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */

h1 {
    font-size: 2em;
    margin: 0.67em 0;
}

/* Grouping content
   ========================================================================== */

/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */

hr {
    box-sizing: content-box; /* 1 */
    height: 0; /* 1 */
    overflow: visible; /* 2 */
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

pre {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
}

/* Text-level semantics
   ========================================================================== */

/**
 * Remove the gray background on active links in IE 10.
 */

a {
    background-color: transparent;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */

abbr[title] {
    border-bottom: none; /* 1 */
    text-decoration: underline; /* 2 */
    text-decoration: underline dotted; /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */

b,
strong {
    font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */

code,
kbd,
samp {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */

small {
    font-size: 80%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */

sub,
sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sub {
    bottom: -0.25em;
}

sup {
    top: -0.5em;
}

/* Embedded content
   ========================================================================== */

/**
 * Remove the border on images inside links in IE 10.
 */

img {
    border-style: none;
}

/* Forms
   ========================================================================== */

/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */

button,
input,
optgroup,
select,
textarea {
    font-family: inherit; /* 1 */
    font-size: 100%; /* 1 */
    line-height: 1.15; /* 1 */
    margin: 0; /* 2 */
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */

button,
input { /* 1 */
    overflow: visible;
}

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */

button,
select { /* 1 */
    text-transform: none;
}

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */

button,
[type="button"],
[type="reset"],
[type="submit"] {
    -webkit-appearance: button;
}

/**
 * Remove the inner border and padding in Firefox.
 */

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
    border-style: none;
    padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
    outline: 1px dotted ButtonText;
}

/**
 * Correct the padding in Firefox.
 */

fieldset {
    padding: 0.35em 0.75em 0.625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */

legend {
    box-sizing: border-box; /* 1 */
    color: inherit; /* 2 */
    display: table; /* 1 */
    max-width: 100%; /* 1 */
    padding: 0; /* 3 */
    white-space: normal; /* 1 */
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */

progress {
    vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */

textarea {
    overflow: auto;
}

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */

[type="checkbox"],
[type="radio"] {
    box-sizing: border-box; /* 1 */
    padding: 0; /* 2 */
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
    height: auto;
}

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */

[type="search"] {
    -webkit-appearance: textfield; /* 1 */
    outline-offset: -2px; /* 2 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */

[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */

::-webkit-file-upload-button {
    -webkit-appearance: button; /* 1 */
    font: inherit; /* 2 */
}

/* Interactive
   ========================================================================== */

/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */

details {
    display: block;
}

/*
 * Add the correct display in all browsers.
 */

summary {
    display: list-item;
}

/* Misc
   ========================================================================== */

/**
 * Add the correct display in IE 10+.
 */

template {
    display: none;
}

/**
 * Add the correct display in IE 10.
 */

[hidden] {
    display: none;
}

/* 自定义重置样式 */

/* Box sizing rules */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* Remove default margin */
body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
    margin: 0;
}

/* Remove list styles on ul, ol elements with a list role */
ul[role='list'],
ol[role='list'] {
    list-style: none;
}

/* Set core root defaults */
html:focus-within {
    scroll-behavior: smooth;
}

/* Set core body defaults */
body {
    min-height: 100vh;
    text-rendering: optimizeSpeed;
    line-height: 1.5;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
    text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img,
picture {
    max-width: 100%;
    display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
    font: inherit;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
    html:focus-within {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 表格重置 */
table {
    border-collapse: collapse;
    border-spacing: 0;
}

/* 表单重置 */
button {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
}

input,
textarea {
    border: none;
    outline: none;
    background: none;
}

/* 链接重置 */
a {
    color: inherit;
    text-decoration: none;
}

/* 列表重置 */
ul,
ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* 引用重置 */
blockquote {
    quotes: none;
}

blockquote:before,
blockquote:after {
    content: '';
    content: none;
}

/* 水平线重置 */
hr {
    border: none;
    height: 1px;
    background: #eee;
    margin: 1rem 0;
}

/* 代码重置 */
code,
pre {
    font-family: 'Fira Code', 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* 选择文本样式 */
::selection {
    background: rgba(0, 123, 255, 0.2);
    color: inherit;
}

::-moz-selection {
    background: rgba(0, 123, 255, 0.2);
    color: inherit;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 暗色模式滚动条 */
.dark-mode ::-webkit-scrollbar-track {
    background: #2d2d2d;
}

.dark-mode ::-webkit-scrollbar-thumb {
    background: #555;
}

.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: #777;
}

/* 焦点样式 */
:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* 可访问性隐藏 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 跳过链接 */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 6px;
}