diff --git a/app/static/style.css b/app/static/style.css
index 3bd2567..da07c08 100644
--- a/app/static/style.css
+++ b/app/static/style.css
@@ -130,7 +130,7 @@ code { background: var(--bg); padding: .15rem .4rem; border-radius: 4px; font-si
 .detail-img { width: 100%; max-width: 400px; border-radius: 8px; border: 1px solid var(--border); }
 .detail-img.placeholder { display: flex; align-items: center; justify-content: center; height: 200px; background: var(--bg); color: var(--text-muted); font-size: .95rem; }
 .upload-form { margin-top: .5rem; display: flex; gap: .5rem; align-items: center; }
-.upload-form input[type="file"] { font-size: .85rem; min-width: 0; max-width: 260px; }
+.upload-form input[type="file"] { font-size: .85rem; min-width: 0; flex: 1; }
 .upload-form .btn { white-space: nowrap; flex-shrink: 0; }
 .detail-meta dl { display: grid; grid-template-columns: auto 1fr; gap: .3rem 1rem; }
 .detail-meta dt { font-weight: 600; font-size: .85rem; color: var(--text-muted); }
diff --git a/app/templates/postcard_form.html b/app/templates/postcard_form.html
index 93255dc..41a021a 100644
--- a/app/templates/postcard_form.html
+++ b/app/templates/postcard_form.html
@@ -17,11 +17,11 @@
 
     <div id="fields-sent-delivered">
         <label>收件人 *</label>
-        <input type="text" name="recipient_name" value="{{ postcard.recipient_name if postcard else '' }}" required>
+        <input type="text" name="recipient_name" id="input-recipient" value="{{ postcard.recipient_name if postcard else '' }}">
         <label>国家/地区 *</label>
-        <input type="text" name="country" value="{{ postcard.country if postcard else '' }}" required maxlength="2" placeholder="JP" style="width:80px;text-transform:uppercase">
+        <input type="text" name="country" id="input-country" value="{{ postcard.country if postcard else '' }}" maxlength="2" placeholder="JP" style="width:80px;text-transform:uppercase">
         <label>寄出时间 *</label>
-        <input type="date" name="send_time" value="{{ postcard.send_time.strftime('%Y-%m-%d') if postcard and postcard.send_time else '' }}" required>
+        <input type="date" name="send_time" id="input-send-time" value="{{ postcard.send_time.strftime('%Y-%m-%d') if postcard and postcard.send_time else '' }}">
         <label id="label-arrival">到达时间</label>
         <input type="date" name="arrival_time" id="input-arrival" value="{{ postcard.arrival_time.strftime('%Y-%m-%d') if postcard and postcard.arrival_time else '' }}">
     </div>
@@ -43,6 +43,9 @@ function toggleFields() {
     var s = document.getElementById('status-select').value;
     var sd = document.getElementById('fields-sent-delivered');
     var rc = document.getElementById('fields-received');
+    var recipient = document.getElementById('input-recipient');
+    var country = document.getElementById('input-country');
+    var sendTime = document.getElementById('input-send-time');
     var arrival = document.getElementById('input-arrival');
     var labelArrival = document.getElementById('label-arrival');
     var sender = document.getElementById('input-sender');
@@ -50,12 +53,18 @@ function toggleFields() {
     if (s === 'received') {
         sd.style.display = 'none';
         rc.style.display = '';
+        recipient.required = false;
+        country.required = false;
+        sendTime.required = false;
+        arrival.required = false;
         sender.required = true;
         receive.required = true;
-        arrival.required = false;
     } else {
         sd.style.display = '';
         rc.style.display = 'none';
+        recipient.required = true;
+        country.required = true;
+        sendTime.required = true;
         sender.required = false;
         receive.required = false;
         if (s === 'delivered') {