diff --git a/normalize.css b/normalize.css
index 57b5d2679..2683ad080 100644
--- a/normalize.css
+++ b/normalize.css
@@ -1,375 +1,369 @@
-/*! normalize.css v2.0.1 | MIT License | git.io/normalize */
-
-/* ==========================================================================
-   HTML5 display definitions
-   ========================================================================== */
-
-/*
- * Corrects `block` display not defined in IE 8/9.
- */
-
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-hgroup,
-nav,
-section,
-summary {
-    display: block;
-}
-
-/*
- * Corrects `inline-block` display not defined in IE 8/9.
- */
-
-audio,
-canvas,
-video {
-    display: inline-block;
-}
-
-/*
- * Prevents modern browsers from displaying `audio` without controls.
- * Remove excess height in iOS 5 devices.
- */
-
-audio:not([controls]) {
-    display: none;
-    height: 0;
-}
-
-/*
- * Addresses styling for `hidden` attribute not present in IE 8/9.
- */
-
-[hidden] {
-    display: none;
-}
-
-/* ==========================================================================
-   Base
-   ========================================================================== */
-
-/*
- * 1. Sets default font family to sans-serif.
- * 2. Prevents iOS text size adjust after orientation change, without disabling
- *    user zoom.
- */
-
-html {
-    font-family: sans-serif; /* 1 */
-    -webkit-text-size-adjust: 100%; /* 2 */
-    -ms-text-size-adjust: 100%; /* 2 */
-}
-
-/*
- * Removes default margin.
- */
-
-body {
-    margin: 0;
-}
-
-/* ==========================================================================
-   Links
-   ========================================================================== */
-
-/*
- * Addresses `outline` inconsistency between Chrome and other browsers.
- */
-
-a:focus {
-    outline: thin dotted;
-}
-
-/*
- * Improves readability when focused and also mouse hovered in all browsers.
- */
-
-a:active,
-a:hover {
-    outline: 0;
-}
-
-/* ==========================================================================
-   Typography
-   ========================================================================== */
-
-/*
- * Addresses `h1` font sizes within `section` and `article` in Firefox 4+,
- * Safari 5, and Chrome.
- */
-
-h1 {
-    font-size: 2em;
-}
-
-/*
- * Addresses styling not present in IE 8/9, Safari 5, and Chrome.
- */
-
-abbr[title] {
-    border-bottom: 1px dotted;
-}
-
-/*
- * Addresses style set to `bolder` in Firefox 4+, Safari 5, and Chrome.
- */
-
-b,
-strong {
-    font-weight: bold;
-}
-
-/*
- * Addresses styling not present in Safari 5 and Chrome.
- */
-
-dfn {
-    font-style: italic;
-}
-
-/*
- * Addresses styling not present in IE 8/9.
- */
-
-mark {
-    background: #ff0;
-    color: #000;
-}
-
-
-/*
- * Corrects font family set oddly in Safari 5 and Chrome.
- */
-
-code,
-kbd,
-pre,
-samp {
-    font-family: monospace, serif;
-    font-size: 1em;
-}
-
-/*
- * Improves readability of pre-formatted text in all browsers.
- */
-
-pre {
-    white-space: pre;
-    white-space: pre-wrap;
-    word-wrap: break-word;
-}
-
-/*
- * Sets consistent quote types.
- */
-
-q {
-    quotes: "\201C" "\201D" "\2018" "\2019";
-}
-
-/*
- * Addresses inconsistent and variable font size in all browsers.
- */
-
-small {
-    font-size: 80%;
-}
-
-/*
- * Prevents `sub` and `sup` affecting `line-height` in all browsers.
- */
-
-sub,
-sup {
-    font-size: 75%;
-    line-height: 0;
-    position: relative;
-    vertical-align: baseline;
-}
-
-sup {
-    top: -0.5em;
-}
-
-sub {
-    bottom: -0.25em;
-}
-
-/* ==========================================================================
-   Embedded content
-   ========================================================================== */
-
-/*
- * Removes border when inside `a` element in IE 8/9.
- */
-
-img {
-    border: 0;
-}
-
-/*
- * Corrects overflow displayed oddly in IE 9.
- */
-
-svg:not(:root) {
-    overflow: hidden;
-}
-
-/* ==========================================================================
-   Figures
-   ========================================================================== */
-
-/*
- * Addresses margin not present in IE 8/9 and Safari 5.
- */
-
-figure {
-    margin: 0;
-}
-
-/* ==========================================================================
-   Forms
-   ========================================================================== */
-
-/*
- * Define consistent border, margin, and padding.
- */
-
-fieldset {
-    border: 1px solid #c0c0c0;
-    margin: 0 2px;
-    padding: 0.35em 0.625em 0.75em;
-}
-
-/*
- * 1. Corrects color not being inherited in IE 8/9.
- * 2. Remove padding so people aren't caught out if they zero out fieldsets.
- */
-
-legend {
-    border: 0; /* 1 */
-    padding: 0; /* 2 */
-}
-
-/*
- * 1. Corrects font family not being inherited in all browsers.
- * 2. Corrects font size not being inherited in all browsers.
- * 3. Addresses margins set differently in Firefox 4+, Safari 5, and Chrome
- */
-
-button,
-input,
-select,
-textarea {
-    font-family: inherit; /* 1 */
-    font-size: 100%; /* 2 */
-    margin: 0; /* 3 */
-}
-
-/*
- * Addresses Firefox 4+ setting `line-height` on `input` using `!important` in
- * the UA stylesheet.
- */
-
-button,
-input {
-    line-height: normal;
-}
-
-/*
- * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
- *    and `video` controls.
- * 2. Corrects inability to style clickable `input` types in iOS.
- * 3. Improves usability and consistency of cursor style between image-type
- *    `input` and others.
- */
-
-button,
-html input[type="button"], /* 1 */
-input[type="reset"],
-input[type="submit"] {
-    -webkit-appearance: button; /* 2 */
-    cursor: pointer; /* 3 */
-}
-
-/*
- * Re-set default cursor for disabled elements.
- */
-
-button[disabled],
-input[disabled] {
-    cursor: default;
-}
-
-/*
- * 1. Addresses box sizing set to `content-box` in IE 8/9.
- * 2. Removes excess padding in IE 8/9.
- */
-
-input[type="checkbox"],
-input[type="radio"] {
-    box-sizing: border-box; /* 1 */
-    padding: 0; /* 2 */
-}
-
-/*
- * 1. Addresses `appearance` set to `searchfield` in Safari 5 and Chrome.
- * 2. Addresses `box-sizing` set to `border-box` in Safari 5 and Chrome
- *    (include `-moz` to future-proof).
- */
-
-input[type="search"] {
-    -webkit-appearance: textfield; /* 1 */
-    -moz-box-sizing: content-box;
-    -webkit-box-sizing: content-box; /* 2 */
-    box-sizing: content-box;
-}
-
-/*
- * Removes inner padding and search cancel button in Safari 5 and Chrome
- * on OS X.
- */
-
-input[type="search"]::-webkit-search-cancel-button,
-input[type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none;
-}
-
-/*
- * Removes inner padding and border in Firefox 4+.
- */
-
-button::-moz-focus-inner,
-input::-moz-focus-inner {
-    border: 0;
-    padding: 0;
-}
-
-/*
- * 1. Removes default vertical scrollbar in IE 8/9.
- * 2. Improves readability and alignment in all browsers.
- */
-
-textarea {
-    overflow: auto; /* 1 */
-    vertical-align: top; /* 2 */
-}
-
-/* ==========================================================================
-   Tables
-   ========================================================================== */
-
-/*
- * Remove most spacing between table cells.
- */
-
-table {
-    border-collapse: collapse;
-    border-spacing: 0;
-}
+/*! normalize.css v2.0.1 | MIT License | git.io/normalize */
+
+/* ==========================================================================
+   HTML5 display 定义
+   ========================================================================== */
+
+/*
+ * 更正 IE 8/9 中未定义的 `block` 元素显示。
+ */
+
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+nav,
+section,
+summary {
+    display: block;
+}
+
+/*
+ * 更正 IE 8/9 中未定义的 `inline-block` 元素显示
+ */
+
+audio,
+canvas,
+video {
+    display: inline-block;
+}
+
+/*
+ * 防止现代浏览器将没有 controls 属性的 `audio` 元素显示出来
+ * 移除 iOS 5 设备中多余的高度
+ */
+
+audio:not([controls]) {
+    display: none;
+    height: 0;
+}
+
+/*
+ * 校正 IE 8/9 中 `hidden` 属性不起作用的问题
+ */
+
+[hidden] {
+    display: none;
+}
+
+/* ==========================================================================
+   基本
+   ========================================================================== */
+
+/*
+ * 1. 将默认字体设置为 sans-serif
+ * 2. 在不禁止用户缩放的情况下避免 iOS 设备方向调整后自动校正字体大小
+ */
+
+html {
+    font-family: sans-serif; /* 1 */
+    -webkit-text-size-adjust: 100%; /* 2 */
+    -ms-text-size-adjust: 100%; /* 2 */
+}
+
+/*
+ * 移除缺省的外边距
+ */
+
+body {
+    margin: 0;
+}
+
+/* ==========================================================================
+   链接
+   ========================================================================== */
+
+/*
+ * 校正 `outline` 在 Chrome 和其他浏览器间的不一致
+ */
+
+a:focus {
+    outline: thin dotted;
+}
+
+/*
+ * 增强在所有浏览器中聚焦和鼠标悬停时的可读性
+ */
+
+a:active,
+a:hover {
+    outline: 0;
+}
+
+/* ==========================================================================
+   排版
+   ========================================================================== */
+
+/*
+ * 校正 Firefox 4+，Safari 5 和 Chrome 中 `section` 和 `article` 内的 `h1` 字体大小
+ */
+
+h1 {
+    font-size: 2em;
+}
+
+/*
+ * 校正 IE 8/9， Safari 5 和 Chrome 中样式不呈现的问题
+ */
+
+abbr[title] {
+    border-bottom: 1px dotted;
+}
+
+/*
+ * 校正 Firefox 4+， Safari 5 和 Chrome 中 `bolder` 的样式
+ */
+
+b,
+strong {
+    font-weight: bold;
+}
+
+/*
+ * 校正 Safari 5 和 Chrome 中样式不呈现的问题
+ */
+
+dfn {
+    font-style: italic;
+}
+
+/*
+ * 校正 IE 8/9 中样式不呈现的问题
+ */
+
+mark {
+    background: #ff0;
+    color: #000;
+}
+
+
+/*
+ * 更正 Safari 5 和 Chrome 中诡异的字体设置
+ */
+
+code,
+kbd,
+pre,
+samp {
+    font-family: monospace, serif;
+    font-size: 1em;
+}
+
+/*
+ * 增强所有浏览器中预格式化文本的可读性
+ */
+
+pre {
+    white-space: pre;
+    white-space: pre-wrap;
+    word-wrap: break-word;
+}
+
+/*
+ * 设置一致的引用类型
+ */
+
+q {
+    quotes: "\201C" "\201D" "\2018" "\2019";
+}
+
+/*
+ * 校正所有浏览器中易变且不一致的字体大小
+ */
+
+small {
+    font-size: 80%;
+}
+
+/*
+ * 防止所有浏览器中的 `sub` 和 `sup` 影响到行高 (line-height)
+ */
+
+sub,
+sup {
+    font-size: 75%;
+    line-height: 0;
+    position: relative;
+    vertical-align: baseline;
+}
+
+sup {
+    top: -0.5em;
+}
+
+sub {
+    bottom: -0.25em;
+}
+
+/* ==========================================================================
+   嵌入内容
+   ========================================================================== */
+
+/*
+ * 移除在 IE 8/9 中嵌入到 `a` 元素时的边框
+ */
+
+img {
+    border: 0;
+}
+
+/*
+ * 更正 IE 9 中诡异的 `overflow` 表现
+ */
+
+svg:not(:root) {
+    overflow: hidden;
+}
+
+/* ==========================================================================
+   Figures
+   ========================================================================== */
+
+/*
+ * 更正 IE 8/9 和 Safari 5 中外边距不展示的问题
+ */
+
+figure {
+    margin: 0;
+}
+
+/* ==========================================================================
+   表单
+   ========================================================================== */
+
+/*
+ * 定义一致的边框、外边距和内边距
+ */
+
+fieldset {
+    border: 1px solid #c0c0c0;
+    margin: 0 2px;
+    padding: 0.35em 0.625em 0.75em;
+}
+
+/*
+ * 1. 更正 IE 8/9 中颜色不继承的问题
+ * 2. 移除内边距，确保人们在将 `fieldset` 设置为 0 时不至于大跌眼镜
+ */
+
+legend {
+    border: 0; /* 1 */
+    padding: 0; /* 2 */
+}
+
+/*
+ * 1. 更正所有浏览器中字体不继承的问题
+ * 2. 更正所有浏览器中字号不继承的问题
+ * 3. 更正 Firefox 4+， Safari 5 和 Chrome 中外边距不同的问题
+ */
+
+button,
+input,
+select,
+textarea {
+    font-family: inherit; /* 1 */
+    font-size: 100%; /* 2 */
+    margin: 0; /* 3 */
+}
+
+/*
+ * 更正 Firefox 4+ 用户代理样式表 (UA stylesheet) 中在 `input` 上设置 `line-height` 时使用 `!important` 的问题
+ */
+
+button,
+input {
+    line-height: normal;
+}
+
+/*
+ * 1. 避免 Android 4.0.* 中的 WebKit bug，该 bug 会破坏原生的 `audio` 和 `video` 控制器
+ * 2. 更正 iOS 中无法设置可点击的 `input` 的问题
+ * 3. 增强图片类型以及其他类型的 `input` 中指针的可用性以及样式的一致性
+ */
+
+button,
+html input[type="button"], /* 1 */
+input[type="reset"],
+input[type="submit"] {
+    -webkit-appearance: button; /* 2 */
+    cursor: pointer; /* 3 */
+}
+
+/*
+ * 重置 disabled 元素的默认指针样式
+ */
+
+button[disabled],
+input[disabled] {
+    cursor: default;
+}
+
+/*
+ * 1. 调整 IE 8/9 box sizing 被设置为 `content-box` 的问题
+ * 2. 移除 IE 8/9 中多余的内边距
+ */
+
+input[type="checkbox"],
+input[type="radio"] {
+    box-sizing: border-box; /* 1 */
+    padding: 0; /* 2 */
+}
+
+/*
+ * 1. 校正 Safari 5 和 Chrome 中 `appearance` 被设置为 `searchfield` 的问题
+ * 2. 校正 Safari 5 和 Chrome 中 `box-sizing` 被设置为 `border-box` 的问题
+ *  (include `-moz` to future-proof)
+ */
+
+input[type="search"] {
+    -webkit-appearance: textfield; /* 1 */
+    -moz-box-sizing: content-box;
+    -webkit-box-sizing: content-box; /* 2 */
+    box-sizing: content-box;
+}
+
+/*
+ * 移除 OS X 中 Safari 5 和 Chrome 内部的内边距以及搜索框的取消按钮
+ */
+
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+    -webkit-appearance: none;
+}
+
+/*
+ * 移除 Firefox 4+ 内部的内边距
+ */
+
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+    border: 0;
+    padding: 0;
+}
+
+/*
+ * 1. 移除 IE 8/9 中默认的垂直滚动条
+ * 2. 增强所有浏览器下的文字对齐以及可读性
+ */
+
+textarea {
+    overflow: auto; /* 1 */
+    vertical-align: top; /* 2 */
+}
+
+/* ==========================================================================
+   表格
+   ========================================================================== */
+
+/*
+ * 移除单元格间大部分的间距
+ */
+
+table {
+    border-collapse: collapse;
+    border-spacing: 0;
+}