feat(web.test5): 新增 web 实验5

Web/test5/public/index.css

@@ -0,0 +1,69 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+.container {
+  display: flex;
+  flex-direction: column;
+  min-height: 100vh;
+}
+
+header {
+  background-color: #000000b9;
+  height: 80px;
+  text-align: center;
+  line-height: 80px;
+  font-size: 32px;
+  color: white;
+}
+
+.main {
+  background-color: blue;
+  overflow: hidden;
+  flex: 1;
+  display: flex;
+  flex-direction: row;
+}
+
+.main nav {
+  background-color: cadetblue;
+  float: left;
+  width: 206px;
+}
+
+.main .content {
+  background-color: antiquewhite;
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}
+
+.clearfixed::after {
+  content: "";
+  height: 0;
+  display: block;
+  clear: both;
+  visibility: hidden;
+}
+
+.main img {
+  width: 580px;
+  border-radius: 10px;
+}
+
+.content button {
+  margin-top: 20px;
+  margin-right: 20px;
+  padding: 5px;
+}
+
+footer {
+  height: 40px;
+  background: gray;
+  text-align: center;
+  line-height: 40px;
+}

Web/test5/public/mainMenu.css

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+ul li {
+  list-style: none;
+}
+
+.sub-menu {
+  display: none;
+}
+
+ul > li:hover .sub-menu {
+  display: block;
+}
+
+a {
+  text-decoration: none;
+  color: inherit;
+}
+
+.main-menu li {
+  background: #c22fef;
+  color: aliceblue;
+  border-radius: 2px;
+  text-align: center;
+}
+
+.main-menu > li {
+  width: 200px;
+  border: 1px solid #77049a;
+  margin: 1px 3px;
+}
+
+li:hover {
+  background: #a93aca;
+}
+
+.sjx {
+  border: 8px solid red;
+  border-bottom-color: transparent;
+  border-left-color: transparent;
+  border-right-color: transparent;
+  display: inline-block;
+  justify-content: center;
+  position: absolute;
+  opacity: 0;
+  right: 10%;
+  transform: translateY(50%);
+  transition: opacity 0.1s;
+}
+
+.main-menu li {
+  position: relative;
+}
+
+ul > li:hover div {
+  opacity: 1;
+}