diff --git a/index.html b/index.html
index 7c7964b..bfcfa43 100644
--- a/index.html
+++ b/index.html
@@ -50,7 +50,7 @@
                         </div>
                     </div>
                 </div>
-                <div class="mod-bg">
+                <div class="mod-bg mod-bg-world">
                     <svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto">
                         <defs>
                             <path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z"></path>
diff --git a/static/image/bg.svg b/static/image/bg.svg
deleted file mode 100644
index ab41146..0000000
--- a/static/image/bg.svg
+++ /dev/null
@@ -1,54 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<svg width="1440px" height="448px" viewBox="0 0 1440 448" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-    <!-- Generator: Sketch 59.1 (86144) - https://sketch.com -->
-    <title>编组 5备份</title>
-    <desc>Created with Sketch.</desc>
-    <defs>
-        <linearGradient x1="-5.68700053%" y1="45.5298642%" x2="84.7892757%" y2="53.934985%" id="linearGradient-1">
-            <stop stop-color="#FBFCFD" offset="0%"></stop>
-            <stop stop-color="#F8FCFF" offset="100%"></stop>
-        </linearGradient>
-        <radialGradient cx="49.4552285%" cy="50%" fx="49.4552285%" fy="50%" r="94.8348304%" gradientTransform="translate(0.494552,0.500000),scale(0.311111,1.000000),rotate(90.000000),translate(-0.494552,-0.500000)" id="radialGradient-2">
-            <stop stop-color="#FFFFFF" stop-opacity="0.5" offset="0%"></stop>
-            <stop stop-color="#EDF6FF" stop-opacity="0.578179633" offset="100%"></stop>
-        </radialGradient>
-        <rect id="path-3" x="0" y="0" width="1440" height="448"></rect>
-        <linearGradient x1="72.8463444%" y1="12.5451885%" x2="72.8463444%" y2="295.836589%" id="linearGradient-5">
-            <stop stop-color="#FFFFFF" stop-opacity="0" offset="0%"></stop>
-            <stop stop-color="#9FD7FF" stop-opacity="0.383058348" offset="100%"></stop>
-        </linearGradient>
-        <linearGradient x1="16.6159843%" y1="49.1386719%" x2="5.85340543%" y2="50.8613281%" id="linearGradient-6">
-            <stop stop-color="#FFFFFF" stop-opacity="0" offset="0%"></stop>
-            <stop stop-color="#F2F7FC" offset="100%"></stop>
-        </linearGradient>
-        <rect id="path-7" x="0" y="259" width="1440" height="189"></rect>
-        <linearGradient x1="54.7550093%" y1="16.6478641%" x2="54.7550093%" y2="112.331979%" id="linearGradient-8">
-            <stop stop-color="#FFFFFF" stop-opacity="0" offset="0%"></stop>
-            <stop stop-color="#D2ECFF" stop-opacity="0.225387893" offset="100%"></stop>
-        </linearGradient>
-    </defs>
-    <g id="页面-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
-        <g id="导航方案备份">
-            <g id="编组-5备份">
-                <g id="路径备份">
-                    <g id="蒙版">
-                        <g transform="translate(0.000000, 0.000000)">
-                            <mask id="mask-4" fill="white">
-                                <use xlink:href="#path-3"></use>
-                            </mask>
-                            <g>
-                                <use fill="url(#linearGradient-1)" xlink:href="#path-3"></use>
-                                <use fill="url(#radialGradient-2)" xlink:href="#path-3"></use>
-                            </g>
-                            <g id="矩形备份-32" mask="url(#mask-4)">
-                                <use fill="url(#linearGradient-5)" xlink:href="#path-7"></use>
-                                <use fill="url(#linearGradient-6)" xlink:href="#path-7"></use>
-                            </g>
-                            <rect id="矩形" fill="url(#linearGradient-8)" mask="url(#mask-4)" x="0" y="166" width="1440" height="282"></rect>
-                        </g>
-                    </g>
-                </g>
-            </g>
-        </g>
-    </g>
-</svg>
\ No newline at end of file
diff --git a/static/image/gotop.png b/static/image/gotop.png
deleted file mode 100644
index 04fe0c0..0000000
Binary files a/static/image/gotop.png and /dev/null differ
diff --git a/static/image/word_map.png b/static/image/word_map.png
deleted file mode 100644
index 3b3b9d2..0000000
Binary files a/static/image/word_map.png and /dev/null differ
diff --git a/static/style/index.css b/static/style/index.css
index 0a7234e..a733004 100644
--- a/static/style/index.css
+++ b/static/style/index.css
@@ -214,7 +214,7 @@
     box-sizing: border-box;
     line-height: 36px;
     vertical-align: middle;
-    font-size: 15px;
+    font-size: 16px;
     color: #fff;
     cursor: pointer;
     outline: none;