更新，完成全部的设计

assets/css/loading.css

@@ -0,0 +1,88 @@
+#loading {
+    position: absolute;
+    background-color: #FFF;
+    top: 0px;
+    left: 0px;
+    width: 100%;
+    height: 100%;
+    z-index: 9999;
+}
+
+#loading_bg {
+    background-color: rgba(0, 0, 0, 0.7);
+}
+
+.loader {
+    width: 250px;
+    height: 50px;
+    line-height: 50px;
+    text-align: center;
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    -webkit-transform: translate(-50%, -50%);
+    transform: translate(-50%, -50%);
+    font-family: helvetica, arial, sans-serif;
+    text-transform: uppercase;
+    font-weight: 900;
+    color: rgba(0, 0, 0, 0.5);
+    letter-spacing: 0.2em;
+}
+
+.loader::before,
+.loader::after {
+    content: "";
+    display: block;
+    width: 15px;
+    height: 15px;
+    background:rgba(0, 0, 0, 0.5);
+    position: absolute;
+    -webkit-animation: load .7s infinite alternate ease-in-out;
+    animation: load .7s infinite alternate ease-in-out;
+}
+
+.loader::before {
+    top: 0;
+}
+
+.loader::after {
+    bottom: 0;
+}
+
+@-webkit-keyframes load {
+    0% {
+        left: 0;
+        height: 30px;
+        width: 15px;
+    }
+
+    50% {
+        height: 8px;
+        width: 40px;
+    }
+
+    100% {
+        left: 235px;
+        height: 30px;
+        width: 15px;
+    }
+}
+
+@keyframes load {
+    0% {
+        left: 0;
+        height: 30px;
+        width: 15px;
+    }
+
+    50% {
+        height: 8px;
+        width: 40px;
+    }
+
+    100% {
+        left: 235px;
+        height: 30px;
+        width: 15px;
+    }
+}

assets/css/main.css

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+@font-face {
+    font-family: 'Font1';
+    src: url(../font/CangJiGaoDeGuoMiaoHei.woff);
+}
+
+h1 {
+    border: 2px solid white;
+    border-radius: 5px;
+    margin-top: 2%;
+    margin-right: 10%;
+    margin-bottom: auto;
+    margin-left: 10%;
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+    background-color: rgb(255, 255, 255);
+    font-family: Font1;
+}
+
+p {
+    border: 2px solid white;
+    border-radius: 5px;
+    margin-top: auto;
+    margin-right: 10%;
+    margin-bottom: auto;
+    margin-left: 10%;
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+    background-color: rgb(255, 255, 255);
+    font-family: Font1;
+}
+
+body {
+    background-image: linear-gradient(45deg, transparent 0%, transparent 55%, rgba(64, 64, 64, 0.04) 55%, rgba(64, 64, 64, 0.04) 76%, transparent 76%, transparent 100%), linear-gradient(135deg, transparent 0%, transparent 14%, rgba(64, 64, 64, 0.04) 14%, rgba(64, 64, 64, 0.04) 41%, transparent 41%, transparent 100%), linear-gradient(45deg, transparent 0%, transparent 2%, rgba(64, 64, 64, 0.04) 2%, rgba(64, 64, 64, 0.04) 18%, transparent 18%, transparent 100%), linear-gradient(135deg, transparent 0%, transparent 61%, rgba(64, 64, 64, 0.04) 61%, rgba(64, 64, 64, 0.04) 71%, transparent 71%, transparent 100%), linear-gradient(90deg, rgb(255, 255, 255), rgb(255, 255, 255));
+}
+
+.a_dl{
+    color: lightpink;
+}

assets/css/topbar.css

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+* {
+    margin: 0;
+    padding: 0;
+}
+
+/* 装饰Topbar的div */
+.topbar {
+    height: 40px;
+    font-size: 12px;
+    border: 2px solid white;
+    border-radius: 5px;
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+    background-color: rgb(255, 255, 255);
+}
+
+/* 使得列表值横向排列 */
+.topbar li {
+    display: inline;
+    /* 装饰topbar中的字体 *BOBOBO*/
+    color: rgb(0, 0, 0);
+    /* 字间距 */
+    margin-right: 13px;
+    font-size: large;
+    font-family:Font1;
+}
+
+/* 使得两个ul在同一行显示 */
+.topbar ul {
+    /* border: 1px red solid; */
+    display: inline-block;
+
+    /* ul行高设置 */
+    line-height: 38px;
+}
+
+/* 使得右侧ul靠页面右端显示  */
+.topbar-right {
+    position: absolute;
+    right: 150px;
+
+}
+
+.topbar-left {
+    margin-left: 150px;
+}
+
+a{
+    text-decoration: none;
+    color: black;
+}

assets/js/loading.js

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+console.log(document.readyState);
+
+window.onload = function () {
+        var obj = document.getElementById("loading");
+        obj.innerHTML = "";//删除div内容
+        //删除div
+        var parentObj = obj.parentNode;//获取div的父对象
+        parentObj.removeChild(obj);//通过div的父对象把它删除
+        console.log("loading completed.");
+}