diff --git a/WEBSITE-COMPETITION-BACKEND.md b/WEBSITE-COMPETITION-BACKEND.md
new file mode 100644
index 0000000..e0feea6
--- /dev/null
+++ b/WEBSITE-COMPETITION-BACKEND.md
@@ -0,0 +1,74 @@
+# 官网赛事信息后端接口
+
+## 功能与调用链
+
+`YD_Event.Web` 的“官网赛事信息”页面请求当前环境的 `GET/PUT /api/website-competition`。此接口由 `YD_Event.Admin` 提供，沿用后台登录认证；管理页不需要填写接口地址或管理密钥。
+
+`YD_Event.Admin` 在服务端把请求转发到官网赛事服务的 `/api/competition/admin`。服务间密钥只保存在服务器配置中，不发送给浏览器。官网赛事服务负责校验数据、持久化草稿或发布状态，并通知公开页面刷新。本仓库不新增赛事数据库表。
+
+```text
+YD_Event.Web 管理页
+  → 当前域名 /api/website-competition（后台登录态）
+  → YD_Event.Admin（附加服务间 Bearer 密钥）
+  → 官网赛事服务 /api/competition/admin
+  → 持久化赛事 JSON / 官网公开接口
+```
+
+## 接口
+
+| 方法 | 路径 | 说明 |
+| --- | --- | --- |
+| `GET` | `/api/website-competition` | 读取当前环境的完整赛事草稿，包括未发布内容 |
+| `PUT` | `/api/website-competition` | 保存赛事信息及 `published` 状态，JSON 请求体上限为 8 MB |
+
+两个方法都要求已有的后台登录态。控制器原样转发上游的 JSON 响应和 HTTP 状态码。数据的主要结构如下；详细字段由管理页 Excel 模板及官网赛事服务校验规则约束。
+
+```json
+{
+  "published": false,
+  "competition": { "nameZh": "", "nameEn": "", "dateZh": "", "dateEn": "", "venueZh": "", "venueEn": "" },
+  "notice": { "enabled": false, "textZh": "", "textEn": "" },
+  "schedule": { "currentId": "", "callingId": "", "upcomingCount": 3, "items": [] },
+  "results": { "overall": [], "challenge": [], "battle": [] },
+  "players": [],
+  "records": []
+}
+```
+
+## 服务端配置
+
+| 配置键 | 环境变量写法 | 说明 |
+| --- | --- | --- |
+| `CompetitionApi:AdminUrl` | `CompetitionApi__AdminUrl` | 官网赛事服务管理接口完整 URL；默认 `http://127.0.0.1:8787/api/competition/admin` |
+| `CompetitionApi:AdminToken` | `CompetitionApi__AdminToken` | 与官网赛事服务 `COMPETITION_ADMIN_TOKEN` 相同的服务间密钥 |
+| `CompetitionApi:AdminTokenFile` | `CompetitionApi__AdminTokenFile` | 可选，密钥文件的绝对路径；未配置密钥值时读取 |
+| `COMPETITION_ADMIN_TOKEN` | `COMPETITION_ADMIN_TOKEN` | 密钥值的兼容性回退配置 |
+
+官网赛事服务要求 `COMPETITION_ADMIN_TOKEN` 至少 32 字符。不要将密钥写入前端环境变量、前端代码或公开仓库。若两个服务不在同一网络命名空间，必须配置可由 `YD_Event.Admin` 访问的 `CompetitionApi__AdminUrl`，不能使用默认的 `127.0.0.1`。
+
+## 部署步骤
+
+1. 启动官网赛事服务，设置持久化数据路径及 `COMPETITION_ADMIN_TOKEN`；其健康检查为 `GET /api/competition/ping`。
+2. 在 `YD_Event.Admin` 的运行环境配置管理接口 URL 与相同的服务间密钥，然后启动或重启后端。`Startup` 已注册专用 `WebsiteCompetition` HttpClient。
+3. 将后台站点同源的 `/api/website-competition` 路由转发到 `YD_Event.Admin`。不要把该路径直接暴露或转发到官网赛事服务管理接口。
+4. 管理员登录 `YD_Event.Web` 后打开“官网赛事信息”，导入 `.xlsx`、核对草稿并保存；需要公开展示时再开启“公开发布”。
+
+## 错误排查
+
+| 状态 | 常见原因 |
+| --- | --- |
+| `401/403` | 后台未登录或无权访问；若由上游返回，也可能是服务间密钥不一致 |
+| `413` | `PUT` 请求体超过 8 MB |
+| `502` | 官网赛事服务无法连接 |
+| `503` | 服务端密钥缺失、密钥文件不可读取，或上游 URL 无效 |
+| `504` | 官网赛事服务超过 30 秒未响应 |
+
+控制器不会在错误响应或日志中输出密钥。保存时上游的字段校验错误会原样返回，管理页会展示错误信息。
+
+## 验证
+
+```powershell
+dotnet build .\YD_Event.Web.Entry\YD_Event.Web.Entry.csproj --no-restore
+```
+
+确认官网赛事服务的 `/api/competition/ping` 返回成功；使用已有后台登录态访问 `GET /api/website-competition`，应返回上述赛事结构。未经登录直接访问应被后台认证拒绝。`PUT` 应先在测试环境使用草稿数据验证，再按发布流程操作。
diff --git a/YD_Event.Web.Core/Startup.cs b/YD_Event.Web.Core/Startup.cs
index 6b59773..044508e 100644
--- a/YD_Event.Web.Core/Startup.cs
+++ b/YD_Event.Web.Core/Startup.cs
@@ -106,6 +106,7 @@ public class Startup : AppStartup
 
         //远程请求 文档：https://furion.net/docs/http-agent
         services.AddHttpRemote();
+        services.AddHttpClient("WebsiteCompetition");
 
         services.AddControllers()
             .AddNewtonsoftJson(options =>
diff --git a/YD_Event.Web.Entry/Controllers/WebsiteCompetitionController.cs b/YD_Event.Web.Entry/Controllers/WebsiteCompetitionController.cs
new file mode 100644
index 0000000..e0af363
--- /dev/null
+++ b/YD_Event.Web.Entry/Controllers/WebsiteCompetitionController.cs
@@ -0,0 +1,90 @@
+using System.Net.Http.Headers;
+using System.Text;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace YD_Event.Web.Entry.Controllers;
+
+/// <summary>
+/// 官网赛事信息管理。使用后台登录态访问，服务间密钥只保存在服务端。
+/// </summary>
+[ApiController]
+[Authorize]
+[Route("api/website-competition")]
+public sealed class WebsiteCompetitionController : ControllerBase
+{
+    private readonly IConfiguration _configuration;
+    private readonly IHttpClientFactory _httpClientFactory;
+
+    public WebsiteCompetitionController(IConfiguration configuration, IHttpClientFactory httpClientFactory)
+    {
+        _configuration = configuration;
+        _httpClientFactory = httpClientFactory;
+    }
+
+    [HttpGet]
+    public Task<IActionResult> Get() => ForwardAsync(HttpMethod.Get);
+
+    [HttpPut]
+    [RequestSizeLimit(8 * 1024 * 1024)]
+    public Task<IActionResult> Put() => ForwardAsync(HttpMethod.Put);
+
+    private async Task<IActionResult> ForwardAsync(HttpMethod method)
+    {
+        var token = _configuration["CompetitionApi:AdminToken"]
+            ?? _configuration["COMPETITION_ADMIN_TOKEN"];
+        var tokenFile = _configuration["CompetitionApi:AdminTokenFile"];
+        if (string.IsNullOrWhiteSpace(token) && !string.IsNullOrWhiteSpace(tokenFile))
+        {
+            try
+            {
+                token = (await System.IO.File.ReadAllTextAsync(tokenFile, HttpContext.RequestAborted)).Trim();
+            }
+            catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
+            {
+                return StatusCode(503, new { error = "官网赛事接口密钥文件不可读取" });
+            }
+        }
+
+        if (string.IsNullOrWhiteSpace(token))
+            return StatusCode(503, new { error = "官网赛事接口未配置服务端密钥" });
+
+        var adminUrl = _configuration["CompetitionApi:AdminUrl"]
+            ?? "http://127.0.0.1:8787/api/competition/admin";
+        if (!Uri.TryCreate(adminUrl, UriKind.Absolute, out var target)
+            || (target.Scheme != Uri.UriSchemeHttp && target.Scheme != Uri.UriSchemeHttps))
+            return StatusCode(503, new { error = "官网赛事接口地址无效" });
+
+        using var upstreamRequest = new HttpRequestMessage(method, target);
+        upstreamRequest.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
+        if (method == HttpMethod.Put)
+        {
+            using var reader = new StreamReader(Request.Body, Encoding.UTF8, leaveOpen: true);
+            var body = await reader.ReadToEndAsync(HttpContext.RequestAborted);
+            upstreamRequest.Content = new StringContent(body, Encoding.UTF8, "application/json");
+        }
+
+        try
+        {
+            var client = _httpClientFactory.CreateClient("WebsiteCompetition");
+            client.Timeout = TimeSpan.FromSeconds(30);
+            using var upstreamResponse = await client.SendAsync(
+                upstreamRequest, HttpCompletionOption.ResponseHeadersRead, HttpContext.RequestAborted);
+            var response = await upstreamResponse.Content.ReadAsStringAsync(HttpContext.RequestAborted);
+            return new ContentResult
+            {
+                Content = response,
+                ContentType = "application/json; charset=utf-8",
+                StatusCode = (int)upstreamResponse.StatusCode
+            };
+        }
+        catch (HttpRequestException)
+        {
+            return StatusCode(502, new { error = "官网赛事接口连接失败" });
+        }
+        catch (TaskCanceledException) when (!HttpContext.RequestAborted.IsCancellationRequested)
+        {
+            return StatusCode(504, new { error = "官网赛事接口响应超时" });
+        }
+    }
+}