增加广播栏

yelaymaths/pages/index/index.wxss

@@ -147,3 +147,64 @@ page {
   top: 0;
   width: 370rpx;
 }
+
+/* ── 信息广播（首页最上方，文案为空则整条不渲染）─────────────────
+   文案放得下就静态居中；放不下加 .broadcast-scroll 横向滚动，
+   并把同一段文字渲染两遍首尾相接，滚动到 -50% 时正好接上，看不出循环接缝。 */
+.broadcast {
+  display: flex;
+  align-items: center;
+  width: 710rpx;
+  margin: 12rpx auto 0;
+  padding: 14rpx 20rpx;
+  box-sizing: border-box;
+  background: #fff7e6;
+  border: 1rpx solid #ffe3a3;
+  border-radius: 12rpx;
+}
+
+.broadcast-icon {
+  flex: none;
+  margin-right: 12rpx;
+  font-size: 28rpx;
+  line-height: 1;
+}
+
+.broadcast-body {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+}
+
+/* 静态：居中显示，实在超了也留个省略号兜底 */
+.broadcast-track {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  text-align: center;
+  font-size: 26rpx;
+  color: #e60012; /* 兜底色：真实颜色由 home.broadcast_color 以内联样式覆盖 */
+}
+
+/* 滚动：两段文字并排，整体左移 50% 后无缝重来 */
+.broadcast-scroll {
+  display: inline-flex;
+  overflow: visible;
+  text-overflow: clip;
+  animation: broadcast-marquee 18s linear infinite;
+}
+
+/* 两段文字各带一个等宽右边距，整条宽度 = 2 ×(文字+间距)，
+   所以左移 50% 正好是一段，循环无缝 */
+.broadcast-text {
+  margin-right: 80rpx;
+}
+
+@keyframes broadcast-marquee {
+  from {
+    transform: translateX(0);
+  }
+  to {
+    transform: translateX(-50%);
+  }
+}