加入首次使用的引导页、写入readme文件

static/style-3.css

@@ -604,4 +604,76 @@ select:disabled {
 .dialog-leave-from .dialog-card {
     transform: scale(1) translateY(0);
     opacity: 1;
+}
+
+/* ---------- 账户管理区域 ---------- */
+.profile-section {
+    background: rgba(255, 255, 255, 0.02);
+    border-radius: 16px;
+    padding: 16px 20px;
+    border: 1px solid var(--border-subtle);
+    margin-bottom: 20px;
+}
+.profile-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding-bottom: 12px;
+    border-bottom: 1px solid var(--border-subtle);
+    margin-bottom: 12px;
+    color: var(--text-secondary);
+    font-size: 14px;
+}
+.profile-username {
+    color: var(--primary-blue);
+    font-weight: 500;
+}
+.profile-form {
+    display: grid;
+    grid-template-columns: 1fr 1fr 1fr;
+    gap: 12px 16px;
+    align-items: end;
+}
+.profile-form .form-row {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+.profile-form .form-row label {
+    font-size: 11px;
+    text-transform: uppercase;
+    letter-spacing: 0.5px;
+    color: var(--text-dim);
+}
+.profile-form .form-row input {
+    padding: 8px 12px;
+    background: rgba(255, 255, 255, 0.04);
+    border: 1px solid var(--border-subtle);
+    border-radius: 8px;
+    color: #fff;
+    font-size: 14px;
+    outline: none;
+    transition: border-color 0.3s;
+}
+.profile-form .form-row input:focus {
+    border-color: var(--primary-blue-border);
+}
+.profile-form .save-btn {
+    grid-column: auto;
+    padding: 8px 20px;
+    margin-top: 0;
+    height: 40px;
+}
+.login-success {
+    color: #63e2b7;
+    font-size: 14px;
+    text-align: center;
+    margin-top: 4px;
+    min-height: 24px;
+}
+
+.top-left svg {
+    width: 28px;
+    height: 28px;
+    flex-shrink: 0;
 }