diff --git a/ai_knowledge_base_v2/apps/user-client/src/components/LoginPanel.vue b/ai_knowledge_base_v2/apps/user-client/src/components/LoginPanel.vue
index 886ced8..9988b08 100644
--- a/ai_knowledge_base_v2/apps/user-client/src/components/LoginPanel.vue
+++ b/ai_knowledge_base_v2/apps/user-client/src/components/LoginPanel.vue
@@ -21,6 +21,7 @@ const emit = defineEmits<{
 
 const COUNTDOWN_SECONDS = 60;
 const COUNTDOWN_PREFIX = "ai-kb-sms-countdown:";
+const PHONE_STORAGE_KEY = "ai-kb-login-phone";
 const PHONE_PATTERN = /^1[3-9]\d{9}$/;
 
 const phone = ref("");
@@ -56,7 +57,11 @@ const sendButtonText = computed(() => {
 let countdownTimer: ReturnType<typeof setInterval> | null = null;
 let toastTimer: ReturnType<typeof setTimeout> | null = null;
 
-onMounted(() => restoreCountdown());
+onMounted(() => {
+  const storedPhone = window.localStorage.getItem(PHONE_STORAGE_KEY) ?? "";
+  if (PHONE_PATTERN.test(storedPhone)) phone.value = storedPhone;
+  restoreCountdown();
+});
 onUnmounted(() => {
   stopCountdownTimer();
   if (toastTimer) clearTimeout(toastTimer);
@@ -64,6 +69,7 @@ onUnmounted(() => {
 
 watch(phone, () => {
   code.value = sanitizeDigits(code.value, 6);
+  if (phoneValid.value) window.localStorage.setItem(PHONE_STORAGE_KEY, phone.value);
   restoreCountdown();
 });
 
@@ -82,6 +88,7 @@ function sanitizeDigits(value: string, maxLength: number) {
 function clearPhone() {
   phone.value = "";
   phoneTouched.value = false;
+  window.localStorage.removeItem(PHONE_STORAGE_KEY);
 }
 
 async function sendCode() {
diff --git a/ai_knowledge_base_v2/apps/user-client/src/styles.css b/ai_knowledge_base_v2/apps/user-client/src/styles.css
index bf65550..1304ec8 100644
--- a/ai_knowledge_base_v2/apps/user-client/src/styles.css
+++ b/ai_knowledge_base_v2/apps/user-client/src/styles.css
@@ -295,7 +295,7 @@ textarea:focus-visible {
   padding: 5px 4px;
   border-radius: 10px;
   color: var(--login-muted);
-  font-size: 13px;
+  font-size: 12px;
   line-height: 1.7;
   transition: background 0.18s ease, color 0.18s ease;
 }
@@ -309,13 +309,13 @@ textarea:focus-visible {
   min-height: 34px;
   display: inline-flex;
   align-items: center;
-  gap: 8px;
+  gap: 6px;
   cursor: pointer;
 }
 
 .agreement-toggle input {
-  width: 20px;
-  height: 20px;
+  width: 18px;
+  height: 18px;
   margin: 0;
   accent-color: var(--login-brand-dark);
   cursor: pointer;