diff --git a/static/app.js b/static/app.js
index fbca030..e101b51 100644
--- a/static/app.js
+++ b/static/app.js
@@ -171,21 +171,54 @@ window.createProposal = (event) => createResource(event, "proposals");
 window.createOperation = (event) => createResource(event, "operations");
 window.createProduct = (event) => createResource(event, "products");
 
-async function createTask(event, projectId) {
+window.openTaskForm = (projectId, taskId) => {
+  const form = document.querySelector(`#task-form-${projectId}`);
+  form.classList.remove("hidden");
+  if (taskId === null) {
+    // new task
+    document.querySelector(`#task-id-${projectId}`).value = "";
+    document.querySelector(`#task-name-${projectId}`).value = "";
+    document.querySelector(`#task-phase-${projectId}`).value = "项目准备";
+    document.querySelector(`#task-owner-${projectId}`).value = "";
+    document.querySelector(`#task-due-${projectId}`).value = "";
+    document.querySelector(`#task-notes-${projectId}`).value = "";
+    document.querySelector(`#task-submit-btn-${projectId}`).textContent = "确认新增";
+  } 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-${projectId}`).value = task.phase || "项目准备";
+    document.querySelector(`#task-owner-${projectId}`).value = task.owner || "";
+    document.querySelector(`#task-due-${projectId}`).value = task.due_date || "";
+    document.querySelector(`#task-notes-${projectId}`).value = task.notes || "";
+    document.querySelector(`#task-submit-btn-${projectId}`).textContent = "保存修改";
+  }
+  form.scrollIntoView({ behavior: "smooth" });
+};
+
+window.submitTaskForm = async (event, projectId) => {
   event.preventDefault();
   const form = event.currentTarget;
   const data = Object.fromEntries(new FormData(form).entries());
   data.project_id = projectId;
+  const taskId = data.task_id;
+  delete data.task_id;
   try {
-    await api("/api/tasks", { method: "POST", body: JSON.stringify({ data }) });
+    if (taskId) {
+      await api(`/api/tasks/${taskId}`, { method: "PUT", body: JSON.stringify({ data }) });
+    } else {
+      await api("/api/tasks", { method: "POST", body: JSON.stringify({ data }) });
+    }
     form.reset();
     form.classList.add("hidden");
     await load();
     showTaskModal(projectId);
   } catch (error) {
-    alert("创建失败：" + error.message);
+    alert("保存失败：" + error.message);
   }
-}
+};
 window.createFinance = (event) => createResource(event, "finance");
 window.switchTab = switchTab;
 
@@ -224,24 +257,25 @@ 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 = ["项目准备", "项目执行", "项目验收", "验收完毕"];
-  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">${project.project_name}  ·  任务清单</h2><div class="flex items-center gap-3"><button class="btn btn-primary btn-sm" onclick="event.stopPropagation(); document.querySelector('#task-form-${projectId}').classList.toggle('hidden')"><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="createTask(event, ${projectId})">
+  document.querySelector("#taskModal").innerHTML = `<div class="task-overlay" onclick="closeTaskModal()"><div class="task-panel" onclick="event.stopPropagation()"><div class="task-header"><h2 class="task-title">${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></label>
-        <label class="task-field"><span>任务阶段</span><select name="phase">${phases.map((p) => `<option>${p}</option>`).join("")}</select></label>
-        <label class="task-field"><span>负责人</span><input name="owner"></label>
-        <label class="task-field"><span>截止时间</span><input name="due_date" type="date"></label>
-        <label class="task-field col-span-2"><span>任务说明</span><textarea name="notes" rows="2"></textarea></label>
+        <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-${projectId}"></textarea></label>
       </div>
       <div class="flex justify-end gap-2 mt-3">
         <button type="button" class="btn btn-ghost btn-sm" onclick="document.querySelector('#task-form-${projectId}').classList.add('hidden')">取消</button>
-        <button type="submit" class="btn btn-primary btn-sm">确认新增</button>
+        <button type="submit" class="btn btn-primary btn-sm" id="task-submit-btn-${projectId}">确认新增</button>
       </div>
     </form>
     ${phases.map((phase) => {
     const pt = tasks.filter((t) => t.phase === phase);
     if (!pt.length) return "";
-    return `<div class="task-group"><div class="task-group-hd"><span class="task-group-icon"><i data-lucide="layers"></i></span><span class="task-group-label">${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="${t.id}"><span class="task-dot"><i data-lucide="${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">${t.notes}</span>` : ""}</div><span class="task-col">${t.owner || ""}</span><span class="task-col-badge">${t.due_date || ""}</span></div>`).join("")}</div></div>`;
+    return `<div class="task-group"><div class="task-group-hd"><span class="task-group-icon"><i data-lucide="layers"></i></span><span class="task-group-label">${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">${t.notes}</span>` : ""}</div><span class="task-col">${t.owner || ""}</span><span class="task-col-badge">${t.due_date || ""}</span></div>`).join("")}</div></div>`;
   }).join("")}</div></div></div>`;
   document.querySelector("#taskModal").classList.add("active");
   if (window.lucide) window.lucide.createIcons();
diff --git a/static/styles.css b/static/styles.css
index 6c30cf9..9f9e174 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -494,63 +494,64 @@ td {
 .task-modal { display: none; }
 .task-modal.active { display: block; }
 .task-overlay {
-  position: fixed; inset: 0; background: rgba(10,12,16,0.5); z-index: 200;
+  position: fixed; inset: 0; background: rgba(15,23,42,0.35); z-index: 200;
   display: flex; align-items: flex-start; justify-content: center;
   padding-top: 48px; overflow-y: auto;
 }
 .task-panel {
-  background: #18191c; border-radius: 12px; width: 1000px; max-width: 96vw;
-  box-shadow: 0 24px 80px rgba(0,0,0,0.4); margin-bottom: 48px;
+  background: #fff; border-radius: 12px; width: 1000px; max-width: 96vw;
+  box-shadow: 0 20px 60px rgba(0,0,0,0.12); margin-bottom: 48px;
 }
 .task-header {
   display: flex; align-items: center; justify-content: space-between;
-  padding: 16px 20px; border-bottom: 1px solid #2a2d34;
+  padding: 16px 20px; border-bottom: 1px solid #e2e8f0;
 }
-.task-title { color: #e4e5e7; font-size: 15px; font-weight: 600; }
+.task-title { color: #1e293b; font-size: 15px; font-weight: 600; }
 .task-close {
-  color: #6b6d75; background: none; border: none; cursor: pointer;
+  color: #94a3b8; background: none; border: none; cursor: pointer;
   padding: 4px; border-radius: 6px; display: flex;
 }
-.task-close:hover { color: #e4e5e7; background: #2a2d34; }
+.task-close:hover { color: #475569; background: #f1f5f9; }
 .task-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
 .task-group {
-  background: #1e2025; border-radius: 8px;
-  border: 1px solid #2a2d34; overflow: hidden;
+  background: #fff; border-radius: 8px;
+  border: 1px solid #e2e8f0; overflow: hidden;
 }
 .task-group-hd {
   display: flex; align-items: center; gap: 8px;
-  padding: 10px 14px;
+  padding: 10px 16px; background: #f8fafc;
 }
-.task-group-icon { color: #6b6d75; display: flex; }
-.task-group-label { color: #aeafb4; font-size: 13px; font-weight: 600; }
+.task-group-icon { color: #64748b; display: flex; }
+.task-group-label { color: #334155; font-size: 13px; font-weight: 600; }
 .task-group-n {
-  background: #2a2d34; color: #6b6d75; font-size: 11px;
+  background: #e2e8f0; color: #64748b; font-size: 11px;
   padding: 1px 7px; border-radius: 10px;
 }
 .task-group-list { display: flex; flex-direction: column; }
 .task-row {
   display: flex; align-items: center; gap: 16px;
-  padding: 10px 16px; border-top: 1px solid #24272d;
+  padding: 10px 16px; border-top: 1px solid #f1f5f9;
+  cursor: pointer;
 }
-.task-row:hover { background: #1a1c21; }
-.task-dot { display: flex; color: #4b4d54; flex-shrink: 0; }
+.task-row:hover { background: #f8fafc; }
+.task-dot { display: flex; color: #cbd5e1; flex-shrink: 0; }
 .task-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
-.task-name { color: #c5c6ca; font-size: 13px; }
-.task-desc { color: #5a5c63; font-size: 12px; }
-.task-col { color: #898b94; font-size: 12px; white-space: nowrap; width: 100px; text-align: right; }
-.task-col-badge { color: #898b94; font-size: 12px; white-space: nowrap; width: 80px; text-align: right; }
-.task-none { color: #4b4d54; font-size: 13px; padding: 12px 14px; text-align: center; border-top: 1px solid #24272d; }
+.task-name { color: #1e293b; font-size: 13px; }
+.task-desc { color: #94a3b8; font-size: 12px; word-wrap: break-word; overflow-wrap: break-word; }
+.task-col { color: #64748b; font-size: 12px; white-space: nowrap; width: 100px; text-align: right; }
+.task-col-badge { color: #64748b; font-size: 12px; white-space: nowrap; width: 90px; text-align: right; }
+.task-none { color: #94a3b8; font-size: 13px; padding: 12px 14px; text-align: center; border-top: 1px solid #f1f5f9; }
 .task-form {
-  background: #141518; border: 1px solid #2a2d34; border-radius: 8px;
+  background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px;
   padding: 14px; margin-bottom: 16px;
 }
 .task-field { display: flex; flex-direction: column; gap: 4px; }
-.task-field span { color: #6b6d75; font-size: 12px; }
+.task-field span { color: #64748b; font-size: 12px; }
 .task-field input, .task-field select, .task-field textarea {
-  background: #1e2025; border: 1px solid #2a2d34; border-radius: 6px;
-  color: #e4e5e7; font-size: 13px; padding: 6px 10px; outline: none;
+  background: #fff; border: 1px solid #e2e8f0; border-radius: 6px;
+  color: #1e293b; font-size: 13px; padding: 6px 10px; outline: none;
 }
-.task-field input:focus, .task-field select:focus, .task-field textarea:focus { border-color: #4a6cf7; }
+.task-field input:focus, .task-field select:focus, .task-field textarea:focus { border-color: #2563eb; }
 .col-span-2 { grid-column: span 2; }
 .task-group-add {
   display: block; width: 100%; padding: 10px; text-align: center;