Merge pull request #50 from MinoruSekine/feat/49/gain_to_bonus

feat: Adjust "Gain" notice as official page. (#49)

index.html

@@ -35,20 +35,20 @@ <h2>ターゲット</h2>
 	<input type="number" name="to-level" id="to-level-input" value="1" step="1" min="1" max="31">
       </li>
       <li>
-	<label for="tsukumo-gain-dropdown"><span class="target">倍率</span></label>
+	<label for="tsukumo-gain-dropdown"><span class="target">ボーナス</span></label>
 	<select name="tsukumo-gain" id="tsukumo-gain-dropdown">
 	  <optgroup label="通常時">
-	    <option value="1.0">x1.0</option>
+	    <option value="1.0" selected>&plusmn;0%</option>
 	  </optgroup>
 	  <optgroup label="九十九キャンペーン中">
-	    <option value="1.5">x1.5</option>
+	    <option value="1.5">+50%</option>
 	  </optgroup>
 	  <optgroup label="もののふの日ボーナス">
-	    <option value="1.2">x1.2</option>
-	    <option value="1.4">x1.4</option>
-	    <option value="1.6">x1.6</option>
-	    <option value="1.8">x1.8</option>
-	    <option value="2.0">x2.0</option>
+	    <option value="1.2">+20%</option>
+	    <option value="1.4">+40%</option>
+	    <option value="1.6">+60%</option>
+	    <option value="1.8">+80%</option>
+	    <option value="2.0">+100%</option>
 	  </optgroup>
 	</select>
       </li>