fix：更新约战头部tip模块样式

src/pages/battle-room.vue

@@ -42,6 +42,17 @@ const battleTitle = computed(() => {
   return `${half}v${half}对抗赛`;
 });
 
+/** 靶纸尺寸（cm），由 URL 参数或 API 返回的 targetType 字段填充 */
+const targetSize = ref(0);
+
+/**
+ * 根据 targetSize 动态生成靶纸尺寸文本，如"40cm"
+ * 数据未就绪时显示 "--"；数据来源：创建者取 URL 参数 target，加入者取 API 返回的 targetType
+ */
+const targetSizeLabel = computed(() =>
+  targetSize.value ? `${targetSize.value}cm` : '--'
+);
+
 const ready = ref(false);
 const allReady = ref(false);
 const timer = ref(null);
@@ -56,6 +67,15 @@ async function refreshRoomData() {
   const result = await getRoomAPI(roomNumber.value);
   if (result.started) return;
   room.value = result;
+  // 加入者通过 API 返回的 targetType 字段同步靶纸尺寸，并持久化到本地缓存
+  if (result.targetType) {
+    targetSize.value = result.targetType;
+    uni.setStorageSync(`targetSize_${roomNumber.value}`, result.targetType);
+  } else if (targetSize.value === 0) {
+    // API 无该字段时，从本地缓存兜底（如"返回房间"场景）
+    const stored = uni.getStorageSync(`targetSize_${roomNumber.value}`);
+    if (stored) targetSize.value = stored;
+  }
   owner.value = {};
   opponent.value = {};
   const members = result.members || [];
@@ -269,6 +289,15 @@ onLoad(async (options) => {
     roomNumber.value = options.roomNumber;
     store.updateRoomNumber(options.roomNumber);
   }
+  // 创建者通过 URL 参数 target（1→20cm，2→40cm）初始化靶纸尺寸，并持久化到本地缓存
+  if (options.target) {
+    targetSize.value = parseInt(options.target) * 20;
+    uni.setStorageSync(`targetSize_${roomNumber.value}`, targetSize.value);
+  } else if (roomNumber.value) {
+    // "返回房间"等无 target 参数的场景：从本地缓存恢复（待 refreshRoomData 进一步覆盖）
+    const stored = uni.getStorageSync(`targetSize_${roomNumber.value}`);
+    if (stored) targetSize.value = stored;
+  }
 });
 
 /**
@@ -299,11 +328,8 @@ onBeforeUnmount(() => {
       <GuideTwo>
         <view class="battle-guide">
           <view class="guide-tips">
-            <text>弓箭手们，人都到齐了吗?</text>
-            <text v-if="room.battleType === 1">{{
-              `${room.count / 2}v${room.count / 2}比赛即将开始!`
-            }}</text>
-            <text v-if="room.battleType === 2">大乱斗即将开始! </text>
+            <text class="guide-tips__target">请使用{{ targetSizeLabel }}全环靶</text>
+            <text class="guide-tips__warn">如果实际靶纸与选择靶纸不同，将导致射箭无效</text>
           </view>
         </view>
       </GuideTwo>
@@ -818,4 +844,23 @@ onBeforeUnmount(() => {
   border: 1rpx solid #a3793f66;
   color: #fed847;
 }
+
+.guide-tips__target {
+  font-weight: 400;
+  font-size: 26rpx;
+  color: rgba(255, 217, 71, 0.8);
+}
+
+.guide-tips__warn {
+  font-weight: 400;
+  font-size: 22rpx;
+  color: rgba(255, 255, 255, 0.8);
+  margin-top: 6rpx;
+}
+
+.guide-tips {
+  display: flex;
+  flex-direction: column;
+  padding-left: 20rpx;
+}
 </style>