更新（20191109）

docs/css/tool.css

@@ -1,78 +1,11 @@
 @charset "UTF-8";
 
-* {
-    margin: 0;
-    padding: 0;
-}
-html {
-    scroll-behavior: smooth;
-}
 body {
     padding: 20px 0 50px 0;
     background-color: #999;
     scroll-behavior: smooth;
 }
 
-/* 背景 */
-
-.page-background {
-    z-index: -100;
-    position: fixed;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100vh;
-    background-attachment: fixed;
-    background-image: url(../img/Unsplash_V6TWE6h8gyg.jpg);
-    background-position: center;
-    background-repeat: no-repeat;
-    background-size: cover;
-}
-.page-background:after {
-    content: "";
-    z-index: -90;
-    position: inherit;
-    top: inherit;
-    left: inherit;
-    width: inherit;
-    height: inherit;
-    background: inherit;
-    filter: blur(4px);
-}
-
-/* 滚动条 */
-
-::-webkit-scrollbar {
-    height: 8px;
-    width: 8px;
-}
-::-webkit-scrollbar-thumb {
-    background-color: #CCC;
-    border-radius: 0;
-}
-::-webkit-scrollbar-thumb:hover {
-    background-color: #03A9F4;
-}
-::-webkit-scrollbar-track {
-    background-color: #FFF;
-    border-radius: 0;
-}
-
-/* 选中 */
-
-::selection {
-    background:#03A9F4;
-    color:#FFF;
-}
-::-moz-selection {
-    background:#03A9F4;
-    color:#FFF;
-}
-::-webkit-selection {
-    background:#03A9F4;
-    color:#FFF;
-}
-
 /* 主要 */
 
 .main {
@@ -280,23 +213,3 @@ body {
 .to-top:hover {
     animation: ToTopAnimation 0.5s ease-in-out;
 }
-
-/* 动画 */
-
-@keyframes ToTopAnimation {
-    0% {
-    }
-    50% {
-        right: 25px;
-        bottom: 25px;
-        height: 40px;
-        width: 40px;
-        line-height: 40px;
-        font-size: 20px;
-        color: #FFF;
-    }
-    100% {
-        color: #2196F3;
-        transform: rotate(360deg);
-    }
-}