增加小程序，修改游戏前端

games/minipro/calculation/miniprogram/pages/relative/relative.wxss

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+.container {
+  display: flex;
+  flex-direction: column;
+  height: 100vh;
+  background-color: #f6f6f6;
+}
+
+.display-area {
+  flex: 1;
+  background-color: #fff;
+  padding: 20px;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: flex-end;
+}
+
+.chain-text {
+  font-size: 18px;
+  color: #666;
+  margin-bottom: 20px;
+  word-break: break-all;
+  text-align: right;
+}
+
+.result-text {
+  font-size: 32px;
+  color: #333;
+  font-weight: bold;
+}
+
+.control-area {
+  background-color: #e0e0e0;
+  padding: 10px;
+  padding-bottom: 40px; /* Safe area for some phones */
+}
+
+.action-bar {
+  display: flex;
+  justify-content: space-between;
+  margin-bottom: 10px;
+}
+
+.action-btn {
+  background-color: #f8f8f8;
+  color: #f00;
+  width: 48%;
+}
+
+.grid-keyboard {
+  display: grid;
+  grid-template-columns: repeat(5, 1fr);
+  gap: 10px;
+}
+
+.key-btn {
+  background-color: #fff;
+  height: 60px;
+  line-height: 60px;
+  text-align: center;
+  font-size: 18px;
+  border-radius: 5px;
+  padding: 0;
+}