修改配色方案，调整了顶部横幅的布局，使其内容靠左对齐。

public/css/style.css

@@ -125,34 +125,35 @@ header p {
     display: flex;
     align-items: center;
     justify-content: center;
-    background: rgba(15, 23, 42, 0.92);
+    background: rgba(255, 255, 255, 0.92);
     z-index: 50;
     padding: 2rem;
 }
 
 .login-card {
     width: min(480px, 100%);
-    background: rgba(15, 23, 42, 0.96);
-    border: 1px solid rgba(148, 163, 184, 0.15);
+    background: #ffffff;
+    border: 1px solid rgba(148, 163, 184, 0.3);
     border-radius: 24px;
     padding: 2rem;
-    box-shadow: 0 40px 80px rgba(15, 23, 42, 0.4);
+    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.12);
 }
 
 .login-card h2 {
-    margin: 0 0 1rem;
+    margin: 0 0 0.75rem;
     font-size: 1.75rem;
+    color: #111827;
 }
 
 .login-card p {
-    color: var(--text-secondary);
+    color: #6b7280;
     margin: 0 0 1.5rem;
 }
 
 .login-card label {
     display: block;
     margin-bottom: 1rem;
-    color: var(--text-secondary);
+    color: #4b5563;
     font-size: 0.95rem;
 }
 
@@ -163,21 +164,26 @@ header p {
 
 .login-card input {
     width: 100%;
-    border: 1px solid var(--panel-border);
-    background: rgba(255, 255, 255, 0.06);
-    color: var(--text-primary);
+    border: 1px solid rgba(148, 163, 184, 0.5);
+    background: #f8fafc;
+    color: #111827;
     border-radius: 12px;
     padding: 0.85rem 1rem;
     outline: none;
 }
 
+.login-card input:focus {
+    border-color: #2563eb;
+    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
+}
+
 .login-card .primary-btn {
     width: 100%;
     margin-top: 0.75rem;
 }
 
 .form-error {
-    color: #f97316;
+    color: #dc2626;
     margin-top: 0.75rem;
 }
 
@@ -187,15 +193,15 @@ header p {
 
 .bucket-panel label {
     display: block;
-    color: var(--text-secondary);
+    color: #4b5563;
     margin-bottom: 0.5rem;
 }
 
 .bucket-panel select {
     width: 100%;
-    background: rgba(255, 255, 255, 0.08);
-    color: var(--text-primary);
-    border: 1px solid var(--panel-border);
+    background: #f8fafc;
+    color: #111827;
+    border: 1px solid rgba(148, 163, 184, 0.5);
     border-radius: 10px;
     padding: 0.5rem 0.75rem;
     outline: none;
@@ -230,7 +236,7 @@ header p {
     font-weight: 700;
     display: flex;
     align-items: center;
-    justify-content: center;
+    justify-content: flex-start;
 }
 
 .top-banner.hidden {