wip: 迁移 v3-admin v3.1.3 版本代码

src/styles/index.scss

@@ -0,0 +1,42 @@
+@import './mixins.scss'; // mixins
+@import './transition.scss'; // transition
+@import './theme/register.scss'; // 注册主题
+
+.app-container {
+  padding: 20px;
+}
+
+html {
+  height: 100%;
+}
+
+body {
+  height: 100%;
+  background-color: #f0f2f5; // 全局背景色
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-font-smoothing: antialiased;
+  font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Arial,
+    sans-serif;
+}
+
+#app {
+  height: 100%;
+}
+
+*,
+*:before,
+*:after {
+  box-sizing: border-box;
+}
+
+a,
+a:focus,
+a:hover {
+  color: inherit;
+  outline: none;
+  text-decoration: none;
+}
+
+div:focus {
+  outline: none;
+}