diff --git a/assets/css/frontend/pages/submit.css b/assets/css/frontend/pages/submit.css
index 49cb1127..b5c36710 100644
--- a/assets/css/frontend/pages/submit.css
+++ b/assets/css/frontend/pages/submit.css
@@ -11,6 +11,11 @@
   white-space: nowrap;
 }
 
+#aksrt-submit-form .but-average > .new-posts-submit {
+  min-width: 0;
+  flex: 1 1 50%;
+}
+
 .editor-main-box {
   overflow: hidden;
 }
diff --git a/templates/parts/submit/sidebar-submit.php b/templates/parts/submit/sidebar-submit.php
index 7cd7fb5f..3c8285af 100644
--- a/templates/parts/submit/sidebar-submit.php
+++ b/templates/parts/submit/sidebar-submit.php
@@ -30,9 +30,9 @@ $can_draft  = !empty($ctx['user_id'])
 
 			<div class="but-average">
 				<?php if ($can_draft) : ?>
-					<button type="button" class="but jb-green new-posts-submit aksrt-submit-btn padding-lg" data-action="posts_draft"><i class="fa fas fa-dot-circle mr6"></i><?php esc_html_e('保存草稿', 'aksrt'); ?></button>
+					<button type="button" class="but jb-green new-posts-submit aksrt-submit-btn padding-lg" data-action="posts_draft"><i class="fa fas fa-fw fa-dot-circle"></i><?php esc_html_e('保存草稿', 'aksrt'); ?></button>
 				<?php endif; ?>
-				<button type="button" class="but jb-blue new-posts-submit aksrt-submit-btn padding-lg" data-action="posts_save" id="aksrt-submit-btn"><i class="fa fas fa-check-square mr6"></i><?php printf(esc_html__('提交%s', 'aksrt'), esc_html((string) $ctx['submit_label'])); ?></button>
+				<button type="button" class="but jb-blue new-posts-submit aksrt-submit-btn padding-lg" data-action="posts_save" id="aksrt-submit-btn"><i class="fa fas fa-fw fa-check-square"></i><?php printf(esc_html__('提交%s', 'aksrt'), esc_html((string) $ctx['submit_label'])); ?></button>
 			</div>
 		<?php endif; ?>
 	</div>
diff --git a/tests/widget-system/post-editor-reference-contract.test.cjs b/tests/widget-system/post-editor-reference-contract.test.cjs
index b056cab8..78b499c7 100644
--- a/tests/widget-system/post-editor-reference-contract.test.cjs
+++ b/tests/widget-system/post-editor-reference-contract.test.cjs
@@ -61,8 +61,11 @@ test('front submit follows the reference newposts shell and cards', () => {
   assert.match(pay, /pay-dawnload-edit/);
   assert.match(submit, /separator muted-3-color theme-box/);
   assert.match(submit, /new-posts-submit/);
+  assert.equal((submit.match(/fa-fw/g) || []).length, 2);
+  assert.doesNotMatch(submit, /fa-(?:dot-circle|check-square) mr6/);
   assert.match(publicCss, /\.but-average\s*>\s*\.but\s*{[^}]*flex:\s*auto/);
   assert.match(submitCss, /#aksrt-submit-form \.new-posts-submit\s*{[^}]*white-space:\s*nowrap;/);
+  assert.match(submitCss, /#aksrt-submit-form \.but-average > \.new-posts-submit\s*{[^}]*min-width:\s*0;[^}]*flex:\s*1 1 50%;/);
   assert.match(mobileSubmitCss, /body \.newposts-wrap\s*{[^}]*float:\s*none;/);
   assert.match(mobileSubmitCss, /body \.sidebar\.show-sidebar\s*{[^}]*display:\s*unset;[^}]*width:\s*100%;[^}]*margin-left:\s*0;/);
   assert.doesNotMatch(submitCss, /\.newposts-wrap\s*>\s*\.(?:content-layout|sidebar)/);