diff --git a/apps/web/app/versions/[id]/page.tsx b/apps/web/app/versions/[id]/page.tsx
index 07dde5e..b51e332 100644
--- a/apps/web/app/versions/[id]/page.tsx
+++ b/apps/web/app/versions/[id]/page.tsx
@@ -303,23 +303,27 @@ export default function VersionDetailPage() {
 
                   const calcGroupProgress = (group: typeof vPlans, type: 'research' | 'product' | 'ui') => {
                     if (group.length === 0) return 0;
-                    if (type === 'research') {
-                      const totals = group.reduce((acc, p) => {
-                        const tasks = p.tasks || [];
-                        acc.total += tasks.length;
-                        acc.done += tasks.filter((t) => t.status === 'completed').length;
-                        return acc;
-                      }, { total: 0, done: 0 });
-                      return totals.total > 0 ? Math.round((totals.done / totals.total) * 100) : 0;
+                    // 每个 plan 按权重贡献进度：completed=1, in_progress=子任务完成率, pending=0
+                    let totalWeight = 0;
+                    for (const p of group) {
+                      if (p.status === 'completed') {
+                        totalWeight += 1;
+                      } else if (p.status === 'in_progress') {
+                        if (type === 'research') {
+                          const tasks = p.tasks || [];
+                          if (tasks.length > 0) {
+                            totalWeight += tasks.filter((t) => t.status === 'completed').length / tasks.length;
+                          }
+                        } else {
+                          const linked = p.linkedRequirementIds || [];
+                          const completed = p.completedRequirementIds || [];
+                          if (linked.length > 0) {
+                            totalWeight += completed.filter((id) => linked.includes(id)).length / linked.length;
+                          }
+                        }
+                      }
                     }
-                    const totals = group.reduce((acc, p) => {
-                      const linked = p.linkedRequirementIds || [];
-                      const completed = p.completedRequirementIds || [];
-                      acc.total += linked.length;
-                      acc.done += completed.filter((id) => linked.includes(id)).length;
-                      return acc;
-                    }, { total: 0, done: 0 });
-                    return totals.total > 0 ? Math.round((totals.done / totals.total) * 100) : 0;
+                    return Math.round((totalWeight / group.length) * 100);
                   };
 
                   const getPlanStatus = (group: typeof vPlans): 'idle' | 'active' | 'done' => {
diff --git a/apps/web/components/version/PlanTab.tsx b/apps/web/components/version/PlanTab.tsx
index 2dd4e99..9a9ad2b 100644
--- a/apps/web/components/version/PlanTab.tsx
+++ b/apps/web/components/version/PlanTab.tsx
@@ -106,19 +106,20 @@ export function PlanTab({ plans, versionId, versionDeadline, currentUserName, pl
                           {plan.tasks.map((task) => (
                             <div key={task.id} className="flex items-center gap-2">
                               <button
+                                disabled={plan.status !== 'in_progress'}
                                 onClick={() => {
-                                  const nextStatus = task.status === 'pending' ? 'in_progress' : task.status === 'in_progress' ? 'completed' : 'pending';
+                                  if (plan.status !== 'in_progress') return;
+                                  const nextStatus = task.status === 'completed' ? 'pending' : 'completed';
                                   const updatedTasks = plan.tasks!.map((t) => t.id === task.id ? { ...t, status: nextStatus as PlanTask['status'] } : t);
                                   onUpdate(plan.id, { tasks: updatedTasks });
                                 }}
-                                className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${task.status === 'completed' ? 'bg-[var(--accent)] border-[var(--accent)]' : task.status === 'in_progress' ? 'border-blue-400 bg-blue-50' : 'border-[var(--line)]'}`}
+                                className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${plan.status !== 'in_progress' ? 'opacity-40 cursor-not-allowed' : ''} ${task.status === 'completed' ? 'bg-[var(--accent)] border-[var(--accent)]' : 'border-[var(--line)]'}`}
                               >
                                 {task.status === 'completed' && <Check className="h-2.5 w-2.5 text-white" strokeWidth={3} />}
-                                {task.status === 'in_progress' && <div className="h-1.5 w-1.5 rounded-full bg-blue-500" />}
                               </button>
                               <span className={`text-[12px] ${task.status === 'completed' ? 'line-through text-[var(--ink-muted)]' : 'text-[var(--ink)]'}`}>{task.title}</span>
-                              <span className={`text-[10px] ${task.status === 'completed' ? 'text-green-600' : task.status === 'in_progress' ? 'text-blue-600' : 'text-[var(--ink-muted)]'}`}>
-                                {task.status === 'completed' ? '已完成' : task.status === 'in_progress' ? '进行中' : '未开始'}
+                              <span className={`text-[10px] ${task.status === 'completed' ? 'text-green-600' : 'text-[var(--ink-muted)]'}`}>
+                                {task.status === 'completed' ? '已完成' : '未完成'}
                               </span>
                             </div>
                           ))}
@@ -141,12 +142,14 @@ export function PlanTab({ plans, versionId, versionDeadline, currentUserName, pl
                             return req ? (
                               <div key={rid} className="flex items-center gap-2">
                                 <button
+                                  disabled={plan.status !== 'in_progress'}
                                   onClick={() => {
+                                    if (plan.status !== 'in_progress') return;
                                     const current = plan.completedRequirementIds || [];
                                     const next = isDone ? current.filter((id) => id !== rid) : [...current, rid];
                                     onUpdate(plan.id, { completedRequirementIds: next });
                                   }}
-                                  className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${isDone ? 'bg-[var(--accent)] border-[var(--accent)]' : 'border-[var(--line)]'}`}
+                                  className={`h-4 w-4 rounded border flex items-center justify-center shrink-0 transition-colors ${plan.status !== 'in_progress' ? 'opacity-40 cursor-not-allowed' : ''} ${isDone ? 'bg-[var(--accent)] border-[var(--accent)]' : 'border-[var(--line)]'}`}
                                 >
                                   {isDone && <Check className="h-2.5 w-2.5 text-white" strokeWidth={3} />}
                                 </button>