update：训练难度展示ui完成

src/static/training-difficulty-design/lock.svg

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="55px" height="55px" viewBox="0 0 55 55" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>编组 11</title>
+    <g id="页面-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="训练难度展示" transform="translate(-160.000000, -478.000000)">
+            <g id="编组-2备份" transform="translate(154.000000, 472.000000)">
+                <g id="编组-11" transform="translate(6.000000, 6.000000)">
+                    <circle id="椭圆形" fill="#CACACA" cx="27.5" cy="27.5" r="27.5"></circle>
+                    <circle id="椭圆形" fill="#FFFFFF" cx="27.5" cy="26" r="25"></circle>
+                    <circle id="椭圆形" fill="#5E5E5E" cx="27.5" cy="26" r="22"></circle>
+                    <circle id="椭圆形" fill="#17B6F2" cx="27.5" cy="26" r="19.5"></circle>
+                    <circle id="椭圆形" fill="#FFC2C2" cx="27.5" cy="26" r="17"></circle>
+                    <circle id="椭圆形" fill="#FF1F33" opacity="0.800000012" cx="27.5" cy="26" r="14.5"></circle>
+                    <circle id="椭圆形" fill="#FED847" cx="27.5" cy="26" r="13"></circle>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>