/* ═══════════════════════════════════════════
       PROFILE PAGE · 双栏布局 · 无封面
       ═══════════════════════════════════════════ */

    .profile-page {
      max-width: 1100px; margin: 0 auto; padding: var(--gap-xl) var(--gap-md);
      display: grid; grid-template-columns: 280px 1fr; gap: var(--gap-xl);
      align-items: start;
    }

    /* ── LEFT SIDEBAR ── */
    .profile-sidebar {
      position: sticky; top: 80px;
      display: flex; flex-direction: column; gap: var(--gap-md);
    }
    .profile-card {
      background: var(--ui-surface); border: 1px solid var(--ui-line);
      border-radius: 6px; overflow: hidden;
    }
    .profile-card-body { padding: var(--gap-xl); }
    .profile-card-section {
      padding: var(--gap-lg) var(--gap-xl);
      border-top: 1px solid var(--ui-line);
    }
    .profile-card-section:first-of-type { border-top: none; }

    /* Avatar area */
    .profile-avatar-area {
      display: flex; flex-direction: column; align-items: center; gap: var(--gap-md);
      padding-bottom: var(--gap-lg);
      border-bottom: 1px solid var(--ui-line); margin-bottom: var(--gap-lg);
    }
    .profile-avatar-circle {
      width: 88px; height: 88px; border-radius: 50%;
      background: var(--ui-surface-2); border: 2px solid var(--ui-line);
      display: flex; align-items: center; justify-content: center;
      font-family: var(--font-serif); font-size: 2.2rem; font-weight: 700;
      color: var(--ui-fg); overflow: hidden; cursor: pointer;
      transition: box-shadow .2s, border-color .2s;
      flex-shrink: 0; position: relative;
    }
    .profile-avatar-circle:hover { border-color: #8b7cf7; box-shadow: 0 0 0 3px rgba(139,124,247,.2); }
    .profile-avatar-circle img {
      width: 100%; height: 100%; object-fit: cover; display: none;
      position: absolute; inset: 0;
    }
    .profile-avatar-circle.has-img img { display: block; }
    .profile-avatar-circle.has-img .avatar-letter { display: none; }
    .profile-avatar-circle .avatar-letter { display: flex; }

    .profile-name-block { text-align: center; }
    .profile-name-block .display-name {
      font-family: var(--font-serif); font-size: 1.15rem; font-weight: 700;
      margin: 0; letter-spacing: -0.01em; line-height: 1.3;
    }
    .profile-name-block .handle {
      font-family: var(--font-mono); font-size: .68rem; color: var(--ui-fg-muted);
      margin-top: 2px;
    }

    /* Cert badges in sidebar */
    .profile-sidebar-certs {
      display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
      margin-top: var(--gap-sm);
    }
    .cert-badge {
      display: inline-flex; align-items: center; gap: 4px;
      font-size: .6rem; font-weight: 500; line-height: 1;
      padding: 2px 8px; border-radius: 3px;
      vertical-align: middle; white-space: nowrap;
      letter-spacing: .03em;
    }
    .cert-badge.association {
      background: linear-gradient(135deg, #6d28d9, #7c3aed);
      color: #f5f3ff; border: 1px solid #8b5cf6;
    }
    .cert-badge.verified_writer {
      background: linear-gradient(135deg, #b45309, #d97706);
      color: #fffbeb; border: 1px solid #f59e0b;
    }
    .cert-badge i { font-size: .55rem; }

    /* Level progress */
    .profile-level-row {
      display: flex; align-items: center; gap: var(--gap-sm);
      margin-top: var(--gap-sm); justify-content: center;
    }
    .profile-level-badge {
      font-family: var(--font-mono); font-size: .62rem; font-weight: 600;
      padding: 3px 10px; background: rgba(139,124,247,.15); color: #a78bfa;
      border-radius: 3px; letter-spacing: .05em;
    }
    .profile-level-progress {
      flex: 1; max-width: 100px; height: 3px; background: var(--ui-line);
      border-radius: 2px; overflow: hidden;
    }
    .profile-level-progress-fill {
      height: 100%; background: #8b7cf7; border-radius: 2px;
      transition: width .3s ease;
    }

    /* Stats in sidebar */
    .profile-stats-row {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-sm);
    }
    .profile-stat-item {
      text-align: center; padding: var(--gap-sm) 4px;
      background: var(--ui-surface-2); border-radius: 4px;
    }
    .profile-stat-item .stat-value {
      font-family: var(--font-mono); font-size: .95rem; font-weight: 700;
      line-height: 1.1; color: var(--ui-fg);
    }
    .profile-stat-item .stat-label {
      font-family: var(--font-mono); font-size: .52rem;
      text-transform: uppercase; letter-spacing: .08em;
      color: var(--ui-fg-muted); margin-top: 3px;
    }

    /* Bio snippet */
    .profile-sidebar-bio {
      font-size: .75rem; color: var(--ui-fg-muted); line-height: 1.65;
      word-break: break-word;
    }
    .profile-sidebar-bio .bio-empty {
      color: var(--ui-fg-muted); opacity: .5; font-style: italic; font-size: .7rem;
    }
    .profile-sidebar-sig {
      font-family: var(--font-serif); font-size: .75rem; color: var(--ui-fg-muted);
      font-style: italic; margin-top: var(--gap-sm); padding-top: var(--gap-sm);
      border-top: 1px solid var(--ui-line);
    }

    /* Sidebar actions */
    .profile-sidebar-actions {
      display: flex; gap: var(--gap-sm); margin-top: var(--gap-sm);
    }
    .profile-sidebar-actions .btn {
      flex: 1; text-align: center; text-decoration: none;
      font-family: var(--font-mono); font-size: .65rem; padding: 8px 12px;
      background: var(--ui-surface-2); border: 1px solid var(--ui-line);
      color: var(--ui-fg-muted); cursor: pointer;
      letter-spacing: .04em; transition: all .15s;
    }
    .profile-sidebar-actions .btn:hover { color: var(--ui-fg); border-color: var(--ui-fg-muted); }
    .profile-sidebar-actions .btn-danger {
      color: #f87171; border-color: rgba(248,113,113,.3);
    }
    .profile-sidebar-actions .btn-danger:hover { background: rgba(248,113,113,.1); }
    .profile-sidebar-actions .btn-primary-outline {
      color: #8b7cf7; border-color: rgba(139,124,247,.3);
    }
    .profile-sidebar-actions .btn-primary-outline:hover { background: rgba(139,124,247,.1); }

    /* Meta info */
    .profile-meta-info {
      font-family: var(--font-mono); font-size: .6rem; color: var(--ui-fg-muted);
      text-align: center; margin-top: var(--gap-sm);
    }

    /* ── RIGHT CONTENT ── */
    .profile-content-area {
      min-width: 0;
    }

    /* Tabs */
    .profile-tabs {
      display: flex; gap: 2px; margin-bottom: var(--gap-lg);
      background: var(--ui-surface); border: 1px solid var(--ui-line);
      border-radius: 6px; padding: 4px; overflow: hidden;
    }
    .profile-tab {
      flex: 1; padding: 9px 12px; font-family: var(--font-mono);
      font-size: .68rem; cursor: pointer; border: none;
      background: transparent; color: var(--ui-fg-muted);
      letter-spacing: .04em; text-align: center;
      border-radius: 4px; transition: all .15s;
      white-space: nowrap;
    }
    .profile-tab:hover { color: var(--ui-fg); background: var(--ui-surface-2); }
    .profile-tab.active {
      background: rgba(139,124,247,.15); color: #a78bfa; font-weight: 600;
    }

    /* ── Tab Panels ── */
    .profile-panel { display: none; }
    .profile-panel.active { display: block; }

    /* Topic items */
    .profile-topic-item {
      display: flex; justify-content: space-between; align-items: center;
      padding: var(--gap-md) var(--gap-lg); border: 1px solid var(--ui-line);
      border-radius: 6px; margin-bottom: var(--gap-sm);
      background: var(--ui-surface); transition: background .15s, border-color .15s;
      gap: var(--gap-md);
    }
    .profile-topic-item:hover { background: var(--ui-surface-2); border-color: rgba(139,124,247,.3); }
    .profile-topic-item .topic-main { flex:1; min-width:0; }
    .profile-topic-item .topic-title {
      font-size: .88rem; font-weight: 500; color: var(--ui-fg);
      text-decoration: none; display: block; white-space: nowrap;
      overflow: hidden; text-overflow: ellipsis;
    }
    .profile-topic-item .topic-title:hover { color: #8b7cf7; }
    .profile-topic-item .topic-meta {
      font-family: var(--font-mono); font-size: .62rem; color: var(--ui-fg-muted);
      margin-top: 3px; display: flex; gap: var(--gap-sm); align-items: center;
    }
    .profile-topic-item .topic-stats { display: flex; gap: var(--gap-xl); flex-shrink: 0; }
    .profile-topic-item .topic-stat { text-align: center; }
    .profile-topic-item .topic-stat-num { font-family: var(--font-mono); font-size: .85rem; font-weight: 600; }
    .profile-topic-item .topic-stat-label {
      font-family: var(--font-mono); font-size: .52rem; color: var(--ui-fg-muted);
      text-transform: uppercase; letter-spacing: .06em;
    }
    .badge-essential {
      display: inline-block; font-size: .58rem; background: rgba(255,180,50,.15);
      color: #ffb432; padding: 1px 6px; font-family: var(--font-mono);
      letter-spacing: .05em; margin-left: 6px;
    }

    /* Reply items */
    .profile-reply-item {
      padding: var(--gap-md) var(--gap-lg); border: 1px solid var(--ui-line);
      border-radius: 6px; margin-bottom: var(--gap-sm); background: var(--ui-surface);
    }
    .profile-reply-item .reply-link {
      font-size: .68rem; color: var(--ui-fg-muted); font-family: var(--font-mono);
      text-decoration: none;
    }
    .profile-reply-item .reply-link:hover { color: #8b7cf7; }
    .profile-reply-item .reply-excerpt {
      font-size: .82rem; color: var(--ui-fg); margin: 4px 0;
      line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 3;
      -webkit-box-orient: vertical; overflow: hidden;
    }
    .profile-reply-item .reply-time {
      font-family: var(--font-mono); font-size: .6rem; color: var(--ui-fg-muted);
    }

    /* ── Form Styling ── */
    .profile-form {
      background: var(--ui-surface); border: 1px solid var(--ui-line);
      border-radius: 6px; padding: var(--gap-xl);
    }
    .profile-form h3 {
      font-family: var(--font-serif); font-size: 1.05rem; margin: 0 0 var(--gap-lg);
      padding-bottom: var(--gap-sm); border-bottom: 1px solid var(--ui-line);
    }
    .form-group { margin-bottom: var(--gap-lg); }
    .form-group label {
      display: block; font-family: var(--font-mono); font-size: .62rem;
      text-transform: uppercase; letter-spacing: .1em; color: var(--ui-fg-muted);
      margin-bottom: 6px;
    }
    .form-group input, .form-group textarea {
      width: 100%; padding: 10px 12px; font-family: 'Inter','PingFang SC',sans-serif;
      font-size: .82rem; background: var(--ui-surface-2); color: var(--ui-fg);
      border: 1px solid var(--ui-line); box-sizing: border-box; border-radius: 4px;
      transition: border-color .15s ease;
    }
    .form-group input:focus, .form-group textarea:focus {
      outline: none; border-color: #8b7cf7; box-shadow: 0 0 0 2px rgba(139,124,247,.1);
    }
    .form-group textarea { min-height: 80px; resize: vertical; line-height: 1.5; }
    .form-hint {
      font-family: var(--font-mono); font-size: .6rem; color: var(--ui-fg-muted); margin-top: 4px;
    }
    .form-preview {
      margin-top: 8px; border: 1px solid var(--ui-line); border-radius: 4px; object-fit: cover;
    }
    .form-preview.avatar-prev { width: 80px; height: 80px; border-radius: 50%; }

    .btn-primary {
      font-family: 'Inter','PingFang SC',sans-serif; font-size: .82rem; font-weight: 600;
      padding: 10px 24px; background: #8b7cf7; color: #fff; border: none;
      border-radius: 4px; transition: all .15s ease; cursor: pointer;
    }
    .btn-primary:hover { background: #9d8fff; }
    .btn-primary:disabled { opacity: .5; cursor: not-allowed; }

    .form-msg {
      padding: 10px 14px; font-family: var(--font-mono); font-size: .68rem;
      margin-bottom: var(--gap-md); display: none; border-radius: 4px;
    }
    .form-msg.success { display: block; background: rgba(74,222,128,.1); border: 1px solid rgba(74,222,128,.25); color: #4ade80; }
    .form-msg.error { display: block; background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.25); color: #f87171; }

    /* ── Certification Section ── */
    .cert-section {
      background: var(--ui-surface); border: 1px solid var(--ui-line);
      border-radius: 6px; padding: var(--gap-xl); margin-bottom: var(--gap-lg);
    }
    .cert-section h3 {
      font-family: var(--font-serif); font-size: 1.05rem; margin: 0 0 var(--gap-md);
      padding-bottom: var(--gap-sm); border-bottom: 1px solid var(--ui-line);
    }
    .cert-form-toggle {
      display: flex; gap: var(--gap-sm); margin-bottom: var(--gap-lg);
      background: var(--ui-surface-2); padding: 4px; border-radius: 6px;
    }
    .cert-form-toggle button {
      flex: 1; padding: 8px 16px; font-family: var(--font-mono); font-size: .68rem;
      background: transparent; border: none; color: var(--ui-fg-muted);
      cursor: pointer; letter-spacing: .04em; border-radius: 4px;
      transition: all .15s;
    }
    .cert-form-toggle button.active {
      background: rgba(139,124,247,.15); color: #a78bfa; font-weight: 600;
    }
    .cert-apply-form { display: none; }
    .cert-apply-form.active { display: block; }
    .cert-current-item {
      display: flex; align-items: center; gap: var(--gap-sm); padding: var(--gap-sm) 0;
      border-bottom: 1px solid var(--ui-line);
    }
    .cert-current-item:last-child { border-bottom: none; }
    .cert-current-item .cert-badge { margin-left: 0; }
    .cert-current-item .cert-meta { font-size: .65rem; color: var(--ui-fg-muted); }

    /* Works input rows */
    .cert-works-list { display: flex; flex-direction: column; gap: var(--gap-sm); }
    .cert-work-row { display: flex; gap: var(--gap-sm); align-items: center; }
    .cert-work-row input {
      flex: 1; padding: 8px 12px; font-family: var(--font-mono); font-size: .7rem;
      background: var(--ui-bg); border: 1px solid var(--ui-line);
      color: var(--ui-fg); border-radius: 4px;
    }
    .cert-work-row input:focus { outline: none; border-color: #8b7cf7; }
    .cert-work-row .work-num {
      font-family: var(--font-mono); font-size: .65rem;
      color: var(--ui-fg-muted); min-width: 1.2em; text-align: center;
    }

    /* Tutorial */
    .cert-tutorial {
      background: var(--ui-surface-2); border: 1px solid var(--ui-line);
      margin-bottom: var(--gap-lg); overflow: hidden; border-radius: 4px;
    }
    .cert-tutorial-header {
      display: flex; align-items: center; gap: 8px;
      padding: 10px 14px; cursor: pointer;
      font-family: var(--font-mono); font-size: .68rem;
      color: var(--ui-fg); user-select: none;
      transition: background .15s;
    }
    .cert-tutorial-header:hover { background: rgba(255,255,255,.03); }
    .cert-tutorial-header i.fa-circle-question { color: #8b7cf7; font-size: .85rem; }
    .cert-tutorial-arrow { margin-left: auto; transition: transform .25s; font-size: .6rem; color: var(--ui-fg-muted); }
    .cert-tutorial-header.open .cert-tutorial-arrow { transform: rotate(180deg); }
    .cert-tutorial-body {
      padding: 0 14px 14px;
      transition: max-height .35s ease, padding .35s ease;
      overflow: hidden;
    }
    .cert-tutorial-body.collapsed { max-height: 0 !important; padding-top: 0; padding-bottom: 0; }
    .cert-tutorial-steps { display: flex; flex-direction: column; gap: 10px; }
    .cert-tutorial-step {
      display: flex; gap: 10px; align-items: flex-start;
      padding: 8px 10px; background: rgba(139,124,247,.06);
      border: 1px solid rgba(139,124,247,.1); border-radius: 4px;
    }
    .cert-step-num {
      flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
      background: #8b7cf7; color: #fff; font-family: var(--font-mono);
      font-size: .62rem; display: flex; align-items: center; justify-content: center;
      font-weight: 700;
    }
    .cert-step-content { display: flex; flex-direction: column; gap: 2px; flex: 1; }
    .cert-step-content strong { font-size: .7rem; color: var(--ui-fg); }
    .cert-step-content a { color: #8b7cf7; text-decoration: none; font-size: .6rem; }
    .cert-step-content a:hover { text-decoration: underline; }

    /* ── Empty State ── */
    .profile-empty {
      text-align: center; padding: var(--gap-3xl); border: 1px solid var(--ui-line);
      background: var(--ui-surface); border-radius: 6px;
    }
    .profile-empty-icon { font-size: 2rem; margin-bottom: var(--gap-sm); opacity: .4; }
    .profile-empty-text {
      font-family: var(--font-mono); font-size: .7rem; color: var(--ui-fg-muted);
      letter-spacing: .06em;
    }

    /* ── Loading ── */
    .loading-spin {
      display: flex; align-items: center; justify-content: center; padding: var(--gap-3xl);
      gap: var(--gap-sm); font-family: var(--font-mono); font-size: .7rem;
      color: var(--ui-fg-muted);
    }
    .loading-spin .spin-dot {
      width: 6px; height: 6px; background: #8b7cf7; border-radius: 50%;
      animation: spinPulse 1.2s ease-in-out infinite;
    }
    .loading-spin .spin-dot:nth-child(2) { animation-delay: .15s; }
    .loading-spin .spin-dot:nth-child(3) { animation-delay: .3s; }
    @keyframes spinPulse {
      0%, 80%, 100% { opacity: .2; transform: scale(.8); }
      40% { opacity: 1; transform: scale(1.2); }
    }

    /* ── Pagination ── */
    .profile-pagination {
      display: flex; justify-content: center; align-items: center; gap: 4px;
      padding: var(--gap-md); font-family: var(--font-mono);
    }
    .profile-pagination button {
      font-family: var(--font-mono); font-size: .65rem; padding: 4px 10px;
      background: transparent; color: var(--ui-fg-muted); border: 1px solid var(--ui-line);
      cursor: pointer; border-radius: 3px;
    }
    .profile-pagination button:hover:not(:disabled) { color: var(--ui-fg); border-color: var(--ui-fg-muted); }
    .profile-pagination button:disabled { opacity: .3; cursor: not-allowed; }
    .profile-pagination button.active { background: #8b7cf7; color: #fff; border-color: #8b7cf7; }
    .profile-pagination .page-info { font-size: .62rem; color: var(--ui-fg-muted); margin: 0 var(--gap-sm); }

    /* Breadcrumb */
    .profile-breadcrumb {
      grid-column: 1 / -1;
    }

    /* Public mode non-sidebar notices */
    .profile-notice {
      grid-column: 1 / -1;
    }

    /* ── Responsive ── */
    @media (max-width: 768px) {
      .profile-page {
        grid-template-columns: 1fr; gap: var(--gap-md);
      }
      .profile-sidebar { position: static; }
      .profile-card-body { padding: var(--gap-lg); }
      .profile-card-section { padding: var(--gap-md) var(--gap-lg); }
      .profile-tabs { flex-wrap: wrap; }
      .profile-tab { flex: unset; font-size: .62rem; padding: 7px 10px; }
      .profile-topic-item .topic-stats { display: none; }
      .profile-stats-row { grid-template-columns: repeat(3, 1fr); }
      .profile-sidebar-actions { flex-wrap: wrap; }
    }
    @media (max-width: 480px) {
      .profile-page { padding: var(--gap-md) var(--gap-sm); }
      .profile-stats-row { grid-template-columns: repeat(3, 1fr); }
    }