diff --git a/static/app.js b/static/app.js
index 9161b4e..fb3f1f6 100644
--- a/static/app.js
+++ b/static/app.js
@@ -172,31 +172,35 @@ window.createOperation = (event) => createResource(event, "operations");
 window.createProduct = (event) => createResource(event, "products");
 
 window.openTaskForm = (projectId, taskId) => {
-  const form = document.querySelector(`#task-form-${projectId}`);
-  form.classList.remove("hidden");
+  const drawer = document.querySelector(`#task-drawer-${projectId}`);
+  const titleEl = drawer.querySelector(".task-drawer-title");
   if (taskId === null) {
-    // new task
     document.querySelector(`#task-id-${projectId}`).value = "";
     document.querySelector(`#task-name-${projectId}`).value = "";
-    document.querySelector(`#task-phase-${projectId}`).value = "项目准备";
+    document.querySelector(`#task-phase-${projectId}`).value = "商务洽谈";
     document.querySelector(`#task-owner-${projectId}`).value = "";
     document.querySelector(`#task-due-${projectId}`).value = "";
     document.querySelector(`#task-notes-${projectId}`).value = "";
+    document.querySelector(`#task-blockers-${projectId}`).value = "";
     document.querySelector(`#task-submit-btn-${projectId}`).textContent = "确认新增";
+    if (titleEl) titleEl.textContent = "新增任务";
   } else {
-    // edit task
     const task = (state.data.tasks || []).find((t) => t.id === taskId);
     if (!task) return;
     document.querySelector(`#task-id-${projectId}`).value = task.id;
     document.querySelector(`#task-name-${projectId}`).value = task.task || "";
-    document.querySelector(`#task-phase-${projectId}`).value = task.phase || "项目准备";
+    document.querySelector(`#task-phase-${projectId}`).value = task.phase || "商务洽谈";
     document.querySelector(`#task-owner-${projectId}`).value = task.owner || "";
     document.querySelector(`#task-due-${projectId}`).value = task.due_date || "";
     document.querySelector(`#task-notes-${projectId}`).value = task.notes || "";
     document.querySelector(`#task-blockers-${projectId}`).value = task.blockers || "";
     document.querySelector(`#task-submit-btn-${projectId}`).textContent = "保存修改";
+    if (titleEl) titleEl.textContent = "编辑任务";
   }
-  form.scrollIntoView({ behavior: "smooth" });
+  drawer.classList.add("open");
+};
+window.closeTaskDrawer = (projectId) => {
+  document.querySelector(`#task-drawer-${projectId}`).classList.remove("open");
 };
 
 window.submitTaskForm = async (event, projectId) => {
@@ -212,6 +216,7 @@ window.submitTaskForm = async (event, projectId) => {
       await api("/api/tasks", { method: "POST", body: JSON.stringify({ data }) });
     }
     await load();
+    closeTaskDrawer(projectId);
     showTaskModal(Number(projectId));
   } catch (error) {
     alert("保存失败：" + error.message);
@@ -255,27 +260,31 @@ function showTaskModal(projectId) {
   const project = state.data.operations.find((x) => x.id === projectId);
   const tasks = (state.data.tasks || []).filter((t) => t.project_id === projectId);
   const phases = ["商务洽谈", "系统上线", "团队分工", "项目交付", "上线推广", "结项验收"];
-  document.querySelector("#taskModal").innerHTML = `<div class="task-overlay" onclick="closeTaskModal()"><div class="task-panel" onclick="event.stopPropagation()"><div class="task-header"><h2 class="task-title">${project.project_name}  ·  任务清单</h2><div class="flex items-center gap-3"><button class="btn btn-primary btn-sm" onclick="event.stopPropagation(); openTaskForm(${projectId}, null)"><i data-lucide="plus"></i>新增任务</button><button class="task-close" onclick="closeTaskModal()"><i data-lucide="x"></i></button></div></div><div class="task-body">
-    <form id="task-form-${projectId}" class="hidden task-form" onsubmit="submitTaskForm(event, ${projectId})">
-      <input type="hidden" name="task_id" id="task-id-${projectId}" value="">
-      <div class="grid grid-cols-2 gap-3">
-        <label class="task-field"><span>任务名称</span><input name="task" required id="task-name-${projectId}"></label>
-        <label class="task-field"><span>任务阶段</span><select name="phase" id="task-phase-${projectId}">${phases.map((p) => `<option>${p}</option>`).join("")}</select></label>
-        <label class="task-field"><span>负责人</span><input name="owner" id="task-owner-${projectId}"></label>
-        <label class="task-field"><span>截止时间</span><input name="due_date" type="date" id="task-due-${projectId}"></label>
-        <label class="task-field col-span-2"><span>任务说明</span><textarea name="notes" rows="2" id="task-notes-${projectId}"></textarea></label>
-        <label class="task-field col-span-2"><span>卡点&备注</span><textarea name="blockers" rows="2" id="task-blockers-${projectId}" placeholder="风险卡点、依赖项等"></textarea></label>
-      </div>
-      <div class="flex justify-end gap-2 mt-3">
-        <button type="button" class="btn btn-ghost btn-sm" onclick="document.querySelector('#task-form-${projectId}').classList.add('hidden')">取消</button>
-        <button type="submit" class="btn btn-primary btn-sm" id="task-submit-btn-${projectId}">确认新增</button>
-      </div>
-    </form>
+  document.querySelector("#taskModal").innerHTML = `<div class="task-overlay" onclick="closeTaskModal()"><div class="task-panel" onclick="event.stopPropagation()"><div class="task-header"><h2 class="task-title">${project.project_name}  ·  任务清单</h2><div class="flex items-center gap-3"><button class="btn btn-primary btn-sm" onclick="event.stopPropagation(); openTaskForm(${projectId}, null)"><i data-lucide="plus"></i>新增任务</button><button class="task-close" onclick="closeTaskModal()"><i data-lucide="x"></i></button></div></div><div class="task-body-wrap">
+    <div class="task-body">
     ${phases.map((phase) => {
     const pt = tasks.filter((t) => t.phase === phase);
     if (!pt.length) return "";
     return `<div class="task-group"><div class="task-group-hd"><span class="task-group-icon"><i data-lucide="layers"></i></span><span class="task-group-label">${phase}</span><span class="task-group-n">${pt.length}</span></div><div class="task-group-list">${pt.map((t) => `<div class="task-row" data-id="${t.id}" onclick="event.stopPropagation(); openTaskForm(${projectId}, ${t.id})"><span class="task-dot"><i data-lucide="${t.status === 'done' ? 'check-circle' : 'circle'}"></i></span><div class="task-main"><span class="task-name">${t.task}</span>${t.notes ? `<span class="task-desc">${t.notes}</span>` : ""}${t.blockers ? `<span class="task-blocker">⚠ ${t.blockers}</span>` : ""}</div><span class="task-col">${t.owner || ""}</span><span class="task-col-badge">${t.due_date || ""}</span></div>`).join("")}</div></div>`;
-  }).join("")}</div></div></div>`;
+  }).join("")}
+    </div>
+    <div id="task-drawer-${projectId}" class="task-drawer">
+      <div class="task-drawer-hd"><span class="task-drawer-title">编辑任务</span><button class="task-close" onclick="closeTaskDrawer(${projectId})"><i data-lucide="x"></i></button></div>
+      <form class="task-drawer-form" onsubmit="submitTaskForm(event, ${projectId})">
+        <input type="hidden" name="task_id" id="task-id-${projectId}" value="">
+        <label class="task-field"><span>任务名称</span><input name="task" required id="task-name-${projectId}"></label>
+        <label class="task-field"><span>任务阶段</span><select name="phase" id="task-phase-${projectId}">${phases.map((p) => `<option>${p}</option>`).join("")}</select></label>
+        <label class="task-field"><span>负责人</span><input name="owner" id="task-owner-${projectId}"></label>
+        <label class="task-field"><span>截止时间</span><input name="due_date" type="date" id="task-due-${projectId}"></label>
+        <label class="task-field"><span>任务说明</span><textarea name="notes" rows="3" id="task-notes-${projectId}"></textarea></label>
+        <label class="task-field"><span>卡点&备注</span><textarea name="blockers" rows="2" id="task-blockers-${projectId}" placeholder="风险卡点、依赖项等"></textarea></label>
+        <div class="flex justify-end gap-2 mt-4 pt-3 border-t border-slate-100">
+          <button type="button" class="btn btn-ghost btn-sm" onclick="closeTaskDrawer(${projectId})">取消</button>
+          <button type="submit" class="btn btn-primary btn-sm" id="task-submit-btn-${projectId}">确认新增</button>
+        </div>
+      </form>
+    </div>
+  </div></div></div>`;
   document.querySelector("#taskModal").classList.add("active");
   if (window.lucide) window.lucide.createIcons();
 }
diff --git a/static/styles.css b/static/styles.css
index 85267b8..c1ff82f 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -501,6 +501,7 @@ td {
 .task-panel {
   background: #fff; border-radius: 12px; width: 1000px; max-width: 96vw;
   box-shadow: 0 20px 60px rgba(0,0,0,0.12); margin-bottom: 48px;
+  overflow: hidden;
 }
 .task-header {
   display: flex; align-items: center; justify-content: space-between;
@@ -512,7 +513,21 @@ td {
   padding: 4px; border-radius: 6px; display: flex;
 }
 .task-close:hover { color: #475569; background: #f1f5f9; }
-.task-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
+.task-body-wrap { position: relative; overflow: hidden; }
+.task-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; transition: margin-right 0.25s ease; }
+.task-drawer {
+  position: absolute; top: 0; right: 0; width: 420px; height: 100%;
+  background: #fff; border-left: 1px solid #e2e8f0;
+  transform: translateX(100%); transition: transform 0.25s ease;
+  z-index: 10; display: flex; flex-direction: column;
+}
+.task-drawer.open { transform: translateX(0); }
+.task-drawer-hd {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 14px 20px; border-bottom: 1px solid #e2e8f0;
+}
+.task-drawer-title { font-size: 15px; font-weight: 600; color: #1e293b; }
+.task-drawer-form { padding: 16px 20px; flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
 .task-group {
   background: #fff; border-radius: 8px;
   border: 1px solid #e2e8f0; overflow: hidden;