Update landing page

src/index.css

@@ -18,6 +18,15 @@
   }
 }
 
+*,
+::before,
+::after {
+  box-sizing: border-box;
+  border-width: 0;
+  border-style: solid;
+  border-color: #ffffff;
+}
+
 .semi-form-vertical .semi-form-field {
   margin: 0;
   padding-top: 8px !important;
@@ -125,3 +134,51 @@
   background-image: radial-gradient(rgb(118, 118, 209) 1px, white 1px);
   background-size: 20px 20px;
 }
+
+.sliding-vertical span {
+  animation: top-to-bottom 9s linear infinite 0s;
+  -ms-animation: top-to-bottom 9s linear infinite 0s;
+  -webkit-animation: top-to-bottom 9s linear infinite 0s;
+  opacity: 0;
+  overflow: hidden;
+  position: absolute;
+}
+
+.sliding-vertical span:nth-child(2) {
+  animation-delay: 3s;
+  -ms-animation-delay: 3s;
+  -webkit-animation-delay: 3s;
+}
+.sliding-vertical span:nth-child(3) {
+  animation-delay: 6s;
+  -ms-animation-delay: 6s;
+  -webkit-animation-delay: 6s;
+}
+
+@keyframes top-to-bottom {
+  0% {
+    opacity: 0;
+  }
+  5% {
+    opacity: 0;
+    transform: translateY(-18px);
+  }
+  10% {
+    opacity: 1;
+    transform: translateY(0px);
+  }
+  25% {
+    opacity: 1;
+    transform: translateY(0px);
+  }
+  30% {
+    opacity: 0;
+    transform: translateY(18px);
+  }
+  80% {
+    opacity: 0;
+  }
+  100% {
+    opacity: 0;
+  }
+}