feat: 优化招生官页面样式和功能

- 新增H5页面相关文件
- 调整CSS样式，修复移动端适配问题
- 优化宣讲会列表显示和时间格式化
- 改进视频播放器交互逻辑
- 修复课程标签显示问题

H5/h5.css

@@ -0,0 +1,39 @@
+body {
+  margin: 0;
+  background-color: #f6f6f6;
+}
+.admission-officer {
+  min-height: 100vh;
+  background-color: #f6f6f6;
+}
+.admission-officer * {
+  padding: 0;
+  margin: 0;
+  box-sizing: border-box;
+  scroll-behavior: smooth;
+}
+.admission-officer .flexflex {
+  display: flex;
+}
+.admission-officer .flexcenter {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+.admission-officer .flexacenter {
+  display: flex;
+  align-items: center;
+}
+.admission-officer .flex1 {
+  flex: 1;
+}
+.admission-officer img {
+  object-fit: cover;
+}
+.admission-officer a {
+  text-decoration: none;
+}
+.admission-officer .aaaa {
+  width: 10rem;
+  height: 6.25rem;
+}