:root {
      /* 亮色模式色彩系统 */
      --bg-canvas: #F5F5F7;
      --bg-surface: #FFFFFF;
      --bg-elevated: #FFFFFF;
      --bg-subtle: #F0F1F5;
      --bg-hover: rgba(0, 0, 0, 0.035);
      --bg-active: rgba(0, 102, 204, 0.08);
      
      --text-primary: #1D1D1F;
      --text-secondary: #515154;
      --text-tertiary: #86868B;
      --text-inverse: #FFFFFF;

      --border-hairline: #E5E5EA;
      --border-strong: #D1D1D6;
      --border-focus: #0066CC;

      /* 克制使用的语义强调色 */
      --accent-primary: #0066CC;
      --accent-hover: #0055B3;
      --accent-soft: rgba(0, 102, 204, 0.1);

      --status-success: #1D8348;
      --status-success-bg: #E8F8F0;
      --status-warning: #B9770E;
      --status-warning-bg: #FEF5E7;
      --status-danger: #D93025;
      --status-danger-bg: #FDEDEC;
      --status-ai: #6C3483;
      --status-ai-bg: #F4ECF7;

      /* 尺寸与圆角 */
      --radius-xs: 6px;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      
      /* 柔和阴影 */
      --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.03);
      --shadow-modal: 0 20px 40px rgba(0, 0, 0, 0.16);

      /* 排版系统 */
      --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --font-mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, monospace;

      /* 布局尺寸 */
      --sidebar-width: 256px;
      --header-height: 60px;
      --bottom-nav-height: 64px;
      --transition-fast: 0.15s cubic-bezier(0.25, 0.1, 0.25, 1);
    }

    html[data-theme="dark"] {
      --bg-canvas: #0D0D0F;
      --bg-surface: #161618;
      --bg-elevated: #202024;
      --bg-subtle: #232328;
      --bg-hover: rgba(255, 255, 255, 0.05);
      --bg-active: rgba(41, 151, 255, 0.14);

      --text-primary: #F5F5F7;
      --text-secondary: #A1A1A6;
      --text-tertiary: #6E6E73;
      --text-inverse: #0D0D0F;

      --border-hairline: #2C2C30;
      --border-strong: #3A3A3F;
      --border-focus: #2997FF;

      --accent-primary: #2997FF;
      --accent-hover: #47A7FF;
      --accent-soft: rgba(41, 151, 255, 0.15);

      --status-success: #30D158;
      --status-success-bg: rgba(48, 209, 88, 0.14);
      --status-warning: #FF9F0A;
      --status-warning-bg: rgba(255, 159, 10, 0.14);
      --status-danger: #FF453A;
      --status-danger-bg: rgba(255, 69, 58, 0.14);
      --status-ai: #BF5AF2;
      --status-ai-bg: rgba(191, 90, 242, 0.15);

      --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.28);
      --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
      --shadow-modal: 0 24px 48px rgba(0, 0, 0, 0.65);
    }

    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html, body {
      max-width: 100%;
      overflow-x: hidden;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-canvas);
      color: var(--text-primary);
      font-size: 14px;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
      color: inherit;
    }

    button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      outline: 2px solid var(--border-focus);
      outline-offset: 1px;
    }

    /* ==================== 通用基础组件 ==================== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      height: 36px;
      padding: 0 14px;
      border-radius: var(--radius-sm);
      font-weight: 500;
      font-size: 13px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: background-color var(--transition-fast), border-color var(--transition-fast), transform 0.08s ease;
      user-select: none;
      white-space: nowrap;
      background: var(--bg-surface);
      color: var(--text-primary);
    }

    .btn:active:not(:disabled) {
      transform: scale(0.985);
    }

    .btn:disabled {
      opacity: 0.55;
      cursor: not-allowed;
    }

    .btn-primary {
      background-color: var(--accent-primary);
      color: #FFFFFF;
    }
    .btn-primary:hover:not(:disabled) {
      background-color: var(--accent-hover);
    }

    .btn-secondary {
      background-color: var(--bg-surface);
      border-color: var(--border-strong);
      color: var(--text-primary);
    }
    .btn-secondary:hover:not(:disabled) {
      background-color: var(--bg-hover);
    }

    .btn-subtle {
      background-color: var(--bg-subtle);
      color: var(--text-secondary);
    }
    .btn-subtle:hover:not(:disabled) {
      background-color: var(--border-hairline);
      color: var(--text-primary);
    }

    .btn-warning {
      background-color: var(--status-warning-bg);
      color: var(--status-warning);
      border-color: transparent;
    }
    .btn-warning:hover:not(:disabled) {
      background-color: var(--status-warning);
      color: #FFFFFF;
    }

    .btn-danger {
      background-color: var(--status-danger-bg);
      color: var(--status-danger);
      border-color: transparent;
    }
    .btn-danger:hover:not(:disabled) {
      background-color: var(--status-danger);
      color: #FFFFFF;
    }

    .btn-sm {
      height: 30px;
      padding: 0 10px;
      font-size: 12px;
      border-radius: var(--radius-xs);
    }

    .btn-icon {
      width: 34px;
      height: 34px;
      padding: 0;
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }

    .icon {
      width: 16px;
      height: 16px;
      stroke: currentColor;
      stroke-width: 1.8;
      stroke-linecap: round;
      stroke-linejoin: round;
      fill: none;
      flex-shrink: 0;
    }

    /* 徽章与状态标签 */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 500;
      line-height: 1.4;
      white-space: nowrap;
    }
    .badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
    }
    .badge-published {
      background-color: var(--status-success-bg);
      color: var(--status-success);
    }
    .badge-published .badge-dot {
      background-color: var(--status-success);
    }
    .badge-draft {
      background-color: var(--status-warning-bg);
      color: var(--status-warning);
    }
    .badge-draft .badge-dot {
      background-color: var(--status-warning);
    }
    .badge-danger {
      background-color: var(--status-danger-bg);
      color: var(--status-danger);
    }
    .badge-pinned {
      background-color: var(--accent-soft);
      color: var(--accent-primary);
    }
    .badge-ai {
      background-color: var(--status-ai-bg);
      color: var(--status-ai);
    }
    .badge-neutral {
      background-color: var(--bg-subtle);
      color: var(--text-secondary);
    }

    /* 表单控件 */
    .input-field, .select-field {
      height: 38px;
      padding: 0 12px;
      background-color: var(--bg-surface);
      border: 1px solid var(--border-strong);
      border-radius: var(--radius-sm);
      color: var(--text-primary);
      outline: none;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
      width: 100%;
      min-width: 0;
    }
    .input-field:focus, .select-field:focus, .textarea-field:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px var(--accent-soft);
      outline: none;
    }
    .input-field::placeholder {
      color: var(--text-tertiary);
    }

    /* Switch 开关 */
    .switch-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      user-select: none;
      font-size: 13px;
      color: var(--text-secondary);
    }
    .switch-input {
      position: absolute;
      opacity: 0;
      width: 0;
      height: 0;
    }
    .switch-slider {
      position: relative;
      width: 38px;
      height: 22px;
      background-color: var(--border-strong);
      border-radius: 999px;
      transition: background-color var(--transition-fast);
      flex-shrink: 0;
    }
    .switch-slider::after {
      content: "";
      position: absolute;
      top: 2px;
      left: 2px;
      width: 18px;
      height: 18px;
      background-color: #FFFFFF;
      border-radius: 50%;
      box-shadow: 0 1px 3px rgba(0,0,0,0.2);
      transition: transform var(--transition-fast);
    }
    .switch-input:checked + .switch-slider {
      background-color: var(--accent-primary);
    }
    .switch-input:checked + .switch-slider::after {
      transform: translateX(16px);
    }
    .switch-input:focus-visible + .switch-slider {
      box-shadow: 0 0 0 3px var(--accent-soft);
    }

    /* 卡片容器 */
    .card {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-hairline);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-xs);
    }

    .callout-box {
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-hairline);
      background-color: var(--bg-subtle);
      font-size: 12.5px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .callout-ai {
      background-color: var(--status-ai-bg);
      border-color: rgba(108, 52, 131, 0.25);
      color: var(--status-ai);
    }
    .callout-warning {
      background-color: var(--status-warning-bg);
      border-color: rgba(185, 119, 14, 0.25);
      color: var(--status-warning);
    }

    /* ==================== 登录、TOTP 二步验证与受邀开户向导视图 ==================== */
    .auth-wrapper {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 16px;
      background: radial-gradient(circle at 50% 0%, var(--accent-soft), transparent 55%), var(--bg-canvas);
    }

    .auth-card {
      width: 100%;
      max-width: 420px;
      background-color: var(--bg-surface);
      border: 1px solid var(--border-hairline);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      padding: 28px 24px;
      overflow: hidden;
    }

    .auth-card.onboarding-card {
      max-width: 520px;
    }

    .auth-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 22px;
    }

    .brand-logo {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background-color: var(--accent-primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      letter-spacing: -0.3px;
      flex-shrink: 0;
      user-select: none;
    }

    .auth-title {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-primary);
      letter-spacing: -0.01em;
    }

    .auth-subtitle {
      font-size: 12px;
      color: var(--text-tertiary);
      margin-top: 2px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      margin-bottom: 6px;
      gap: 8px;
    }

    .auth-error {
      display: none;
      align-items: flex-start;
      gap: 8px;
      padding: 10px 12px;
      border-radius: var(--radius-sm);
      background-color: var(--status-danger-bg);
      color: var(--status-danger);
      font-size: 12px;
      margin-bottom: 16px;
    }
    .auth-error.visible {
      display: flex;
    }

    /* 关键修复 1：TOTP 6 位输入框严格防横向溢出，完美适配 375px 小屏手机 */
    .totp-digit-group {
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 8px;
      width: 100%;
      margin: 16px 0 20px;
    }

    .totp-digit {
      width: 100%;
      min-width: 0;
      height: 46px;
      padding: 0;
      box-sizing: border-box;
      text-align: center;
      font-family: var(--font-mono);
      font-size: 18px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-strong);
      background-color: var(--bg-subtle);
      color: var(--text-primary);
      outline: none;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }
    .totp-digit:focus {
      border-color: var(--border-focus);
      background-color: var(--bg-surface);
      box-shadow: 0 0 0 3px var(--accent-soft);
    }

    @media (max-width: 400px) {
      .auth-card {
        padding: 22px 16px;
      }
      .totp-digit-group {
        gap: 6px;
      }
      .totp-digit {
        height: 42px;
        font-size: 16px;
      }
    }

    /* 受邀开户步骤条 */
    .step-indicator {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 6px;
      margin-bottom: 20px;
    }
    .step-pill {
      padding: 6px 4px;
      border-radius: var(--radius-xs);
      background-color: var(--bg-subtle);
      color: var(--text-tertiary);
      font-size: 11px;
      font-weight: 600;
      text-align: center;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .step-pill.active {
      background-color: var(--accent-soft);
      color: var(--accent-primary);
    }
    .step-pill.done {
      background-color: var(--status-success-bg);
      color: var(--status-success);
    }

    .recovery-codes-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 8px;
      padding: 12px;
      background-color: var(--bg-subtle);
      border: 1px solid var(--border-strong);
      border-radius: var(--radius-sm);
      font-family: var(--font-mono);
      font-size: 13px;
      margin: 12px 0;
    }
    .recovery-code-item {
      padding: 4px 8px;
      background-color: var(--bg-surface);
      border-radius: 4px;
      text-align: center;
      letter-spacing: 0.5px;
    }

    /* ==================== 主控制台布局 ==================== */
    .app-shell {
      display: flex;
      min-height: 100vh;
    }

    /* 左侧边栏 (PC端) */
    .sidebar {
      width: var(--sidebar-width);
      background-color: var(--bg-surface);
      border-right: 1px solid var(--border-hairline);
      display: flex;
      flex-direction: column;
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      z-index: 30;
    }

    .sidebar-header {
      height: var(--header-height);
      padding: 0 16px;
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px solid var(--border-hairline);
    }

    .sidebar-brand-title {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text-primary);
      line-height: 1.25;
    }
    .sidebar-brand-domain {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--text-tertiary);
    }

    .sidebar-nav {
      flex: 1;
      padding: 12px 10px;
      display: flex;
      flex-direction: column;
      gap: 3px;
      overflow-y: auto;
    }

    .nav-section-label {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-tertiary);
      padding: 10px 10px 4px;
      letter-spacing: 0.03em;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .nav-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 9px 12px;
      border-radius: var(--radius-sm);
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      border: none;
      background: transparent;
      width: 100%;
      text-align: left;
      transition: background-color var(--transition-fast), color var(--transition-fast);
    }
    .nav-item-left {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
    }
    .nav-item:hover {
      background-color: var(--bg-hover);
      color: var(--text-primary);
    }
    .nav-item.active {
      background-color: var(--bg-active);
      color: var(--accent-primary);
      font-weight: 600;
    }

    .nav-count {
      font-size: 11px;
      font-family: var(--font-mono);
      padding: 1px 6px;
      border-radius: 99px;
      background-color: var(--bg-subtle);
      color: var(--text-secondary);
      flex-shrink: 0;
    }
    .nav-item.active .nav-count {
      background-color: var(--accent-primary);
      color: #FFFFFF;
    }

    .sidebar-footer {
      padding: 12px;
      border-top: 1px solid var(--border-hairline);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .current-admin-box {
      padding: 8px 10px;
      border-radius: var(--radius-xs);
      background-color: var(--bg-subtle);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      font-size: 12px;
    }

    /* 主内容区 */
    .main-area {
      flex: 1;
      margin-left: var(--sidebar-width);
      display: flex;
      flex-direction: column;
      min-width: 0;
      padding-bottom: 52px;
    }

    .topbar {
      min-height: var(--header-height);
      background-color: var(--bg-surface);
      border-bottom: 1px solid var(--border-hairline);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      position: sticky;
      top: 0;
      z-index: 20;
      flex-wrap: wrap;
    }

    .topbar-left {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: 0;
    }

    .page-heading {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-primary);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .topbar-right {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .revision-pill {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 4px 10px;
      border-radius: 999px;
      background-color: var(--bg-subtle);
      font-size: 11.5px;
      color: var(--text-secondary);
      font-family: var(--font-mono);
    }

    .mobile-pin-shortcut {
      display: none;
    }

    .page-container {
      padding: 24px;
      max-width: 1340px;
      width: 100%;
      margin: 0 auto;
      flex: 1;
    }

    /* ==================== 页面 2：公告总览 ==================== */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
      margin-bottom: 24px;
    }

    .stat-card {
      padding: 18px 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 10px;
      min-width: 0;
    }

    .stat-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 500;
    }

    .stat-value {
      font-size: 28px;
      font-weight: 600;
      color: var(--text-primary);
      letter-spacing: -0.02em;
    }

    .stat-value.stat-time {
      font-size: 15px;
      font-family: var(--font-mono);
      line-height: 1.4;
      word-break: break-all;
    }

    .stat-meta {
      font-size: 12px;
      color: var(--text-tertiary);
    }

    .overview-columns {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }

    .section-card-header {
      padding: 15px 20px;
      border-bottom: 1px solid var(--border-hairline);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }

    .section-card-title {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-primary);
    }

    .quick-actions-list {
      padding: 16px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .quick-action-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-hairline);
      background-color: var(--bg-subtle);
      cursor: pointer;
      transition: border-color var(--transition-fast), background-color var(--transition-fast);
      text-align: left;
      width: 100%;
    }
    .quick-action-item:hover {
      border-color: var(--accent-primary);
      background-color: var(--bg-surface);
    }

    /* ==================== 列表与筛选工具栏 ==================== */
    .filter-bar {
      padding: 14px 16px;
      margin-bottom: 16px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .filter-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      flex: 1;
      min-width: 0;
    }

    .search-box {
      position: relative;
      min-width: 220px;
      flex: 1;
      max-width: 360px;
    }
    .search-box .icon {
      position: absolute;
      left: 11px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-tertiary);
      pointer-events: none;
    }
    .search-box .input-field {
      padding-left: 34px;
    }

    .segmented-control {
      display: inline-flex;
      flex-wrap: wrap;
      background-color: var(--bg-subtle);
      padding: 3px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-hairline);
      max-width: 100%;
    }

    .segment-btn {
      padding: 5px 11px;
      border-radius: var(--radius-xs);
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      background: transparent;
      border: none;
      cursor: pointer;
      transition: all var(--transition-fast);
      white-space: nowrap;
    }
    .segment-btn.active {
      background-color: var(--bg-surface);
      color: var(--text-primary);
      box-shadow: var(--shadow-xs);
    }

    /* 桌面端表格与移动端卡片自适应 */
    .notice-table-wrap {
      width: 100%;
      overflow-x: auto;
    }

    .notice-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .notice-table th {
      padding: 12px 16px;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-tertiary);
      border-bottom: 1px solid var(--border-hairline);
      background-color: var(--bg-subtle);
      white-space: nowrap;
    }

    .notice-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-hairline);
      vertical-align: middle;
    }

    .notice-table tr:last-child td {
      border-bottom: none;
    }

    .notice-table tbody tr:hover {
      background-color: var(--bg-hover);
    }

    .notice-title-cell {
      display: flex;
      flex-direction: column;
      gap: 4px;
      max-width: 460px;
      word-break: break-word;
    }

    .notice-title-link {
      font-weight: 600;
      color: var(--text-primary);
      cursor: pointer;
      display: inline;
      line-height: 1.45;
      text-align: left;
      background: none;
      border: none;
      padding: 0;
    }
    .notice-title-link:hover {
      color: var(--accent-primary);
      text-decoration: underline;
    }

    .notice-id-sub {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--text-tertiary);
      word-break: break-all;
    }

    .time-cell {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-secondary);
      white-space: nowrap;
    }

    .row-actions {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
    }

    /* ==================== 页面 4：Markdown 双栏编辑器 ==================== */
    .editor-top-panel {
      padding: 16px 20px;
      margin-bottom: 16px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .editor-title-row {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .editor-title-input {
      flex: 1;
      min-width: 220px;
      height: 44px;
      font-size: 16px;
      font-weight: 600;
      padding: 0 14px;
    }

    .editor-meta-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 10px;
      border-top: 1px solid var(--border-hairline);
    }

    .editor-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 8px 12px;
      border-bottom: 1px solid var(--border-hairline);
      background-color: var(--bg-subtle);
      gap: 8px;
      flex-wrap: wrap;
    }

    .toolbar-btn-group {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-wrap: wrap;
    }

    .toolbar-btn {
      height: 30px;
      padding: 0 9px;
      border-radius: var(--radius-xs);
      border: 1px solid transparent;
      background: transparent;
      color: var(--text-secondary);
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .toolbar-btn:hover {
      background-color: var(--bg-surface);
      color: var(--text-primary);
      border-color: var(--border-hairline);
    }

    .toolbar-divider {
      width: 1px;
      height: 18px;
      background-color: var(--border-strong);
      margin: 0 4px;
    }

    .editor-mobile-tabs {
      display: none;
    }

    .editor-split-workbench {
      display: grid;
      grid-template-columns: 1fr 1fr;
      min-height: 520px;
    }

    .editor-pane {
      display: flex;
      flex-direction: column;
      border-right: 1px solid var(--border-hairline);
      min-width: 0;
    }

    .pane-header {
      padding: 8px 16px;
      font-size: 11px;
      font-weight: 600;
      color: var(--text-tertiary);
      background-color: var(--bg-surface);
      border-bottom: 1px solid var(--border-hairline);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .markdown-textarea {
      flex: 1;
      width: 100%;
      min-height: 460px;
      padding: 16px;
      border: none;
      resize: vertical;
      background-color: var(--bg-surface);
      color: var(--text-primary);
      font-family: var(--font-mono);
      font-size: 13.5px;
      line-height: 1.7;
      outline: none;
    }

    .preview-pane {
      display: flex;
      flex-direction: column;
      background-color: var(--bg-surface);
      min-width: 0;
    }

    /* Markdown 渲染排版样式 */
    .markdown-body {
      padding: 18px 22px;
      font-size: 14px;
      line-height: 1.75;
      color: var(--text-primary);
      overflow-y: auto;
      max-height: 600px;
      word-break: break-word;
    }
    .markdown-body h1, .markdown-body h2, .markdown-body h3 {
      margin-top: 1.1em;
      margin-bottom: 0.55em;
      font-weight: 600;
      line-height: 1.35;
      color: var(--text-primary);
    }
    .markdown-body h1:first-child, .markdown-body h2:first-child, .markdown-body h3:first-child {
      margin-top: 0;
    }
    .markdown-body h1 { font-size: 19px; padding-bottom: 8px; border-bottom: 1px solid var(--border-hairline); }
    .markdown-body h2 { font-size: 16.5px; }
    .markdown-body h3 { font-size: 15px; }
    .markdown-body p { margin-bottom: 12px; }
    .markdown-body ul, .markdown-body ol {
      margin: 0 0 14px 20px;
    }
    .markdown-body li { margin-bottom: 4px; }
    .markdown-body blockquote {
      margin: 12px 0;
      padding: 10px 14px;
      border-left: 3px solid var(--accent-primary);
      background-color: var(--bg-subtle);
      color: var(--text-secondary);
      border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
    }
    .markdown-body code {
      font-family: var(--font-mono);
      font-size: 12.5px;
      padding: 2px 5px;
      background-color: var(--bg-subtle);
      border-radius: 4px;
      color: var(--accent-primary);
      word-break: break-all;
    }
    .markdown-body pre {
      margin: 12px 0;
      padding: 14px;
      background-color: var(--bg-subtle);
      border: 1px solid var(--border-hairline);
      border-radius: var(--radius-sm);
      overflow-x: auto;
    }
    .markdown-body pre code {
      padding: 0;
      background: transparent;
      color: var(--text-primary);
      word-break: normal;
    }
    .markdown-body a {
      color: var(--accent-primary);
      text-decoration: underline;
      text-underline-offset: 2px;
      word-break: break-all;
    }
    .markdown-body hr {
      border: none;
      border-top: 1px solid var(--border-hairline);
      margin: 16px 0;
    }

    /* ==================== 系统设置与双栏网格 ==================== */
    .settings-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 20px;
    }

    .info-list {
      padding: 18px 20px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .info-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 11px;
      border-bottom: 1px solid var(--border-hairline);
      gap: 12px;
      flex-wrap: wrap;
    }
    .info-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .info-label {
      color: var(--text-secondary);
      font-size: 13px;
    }
    .info-val {
      font-weight: 500;
      color: var(--text-primary);
      text-align: right;
      word-break: break-all;
    }

    /* ==================== 模态框与 Toast 反馈 ==================== */
    .modal-backdrop {
      position: fixed;
      inset: 0;
      background-color: rgba(0, 0, 0, 0.48);
      backdrop-filter: blur(2px);
      display: none;
      align-items: center;
      justify-content: center;
      padding: 14px;
      z-index: 100;
    }
    .modal-backdrop.open {
      display: flex;
    }

    .modal-dialog {
      width: 100%;
      max-width: 500px;
      background-color: var(--bg-elevated);
      border: 1px solid var(--border-hairline);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-modal);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      max-height: 90vh;
    }
    .modal-dialog.modal-lg {
      max-width: 720px;
    }

    .modal-header {
      padding: 15px 20px;
      border-bottom: 1px solid var(--border-hairline);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .modal-title {
      font-size: 15px;
      font-weight: 600;
      word-break: break-word;
    }
    .modal-body {
      padding: 20px;
      overflow-y: auto;
      flex: 1;
    }
    .modal-footer {
      padding: 13px 20px;
      border-top: 1px solid var(--border-hairline);
      background-color: var(--bg-subtle);
      display: flex;
      justify-content: flex-end;
      gap: 10px;
      flex-wrap: wrap;
    }

    .toast-stack {
      position: fixed;
      top: 16px;
      right: 16px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      gap: 8px;
      max-width: 350px;
      width: calc(100% - 32px);
      pointer-events: none;
    }

    .toast-item {
      pointer-events: auto;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      background-color: var(--bg-elevated);
      border: 1px solid var(--border-strong);
      box-shadow: var(--shadow-md);
      font-size: 13px;
      color: var(--text-primary);
    }

    /* 移动端底部导航栏 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      height: var(--bottom-nav-height);
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-hairline);
      z-index: 40;
      grid-template-columns: repeat(5, minmax(0, 1fr));
      padding: 4px 4px;
    }

    .mobile-tab-btn {
      border: none;
      background: transparent;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 3px;
      color: var(--text-tertiary);
      font-size: 11px;
      font-weight: 500;
      cursor: pointer;
      border-radius: var(--radius-xs);
      min-width: 0;
    }
    .mobile-tab-btn.active {
      color: var(--accent-primary);
      font-weight: 600;
    }

    .empty-state {
      padding: 42px 20px;
      text-align: center;
      color: var(--text-tertiary);
    }

    /* ==================== 移动端与平板响应式适配 ==================== */
    @media (max-width: 1024px) {
      .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
      .overview-columns, .settings-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .sidebar {
        display: none;
      }
      .main-area {
        margin-left: 0;
        padding-bottom: calc(var(--bottom-nav-height) + 70px);
      }
      .mobile-bottom-nav {
        display: grid;
      }
      .mobile-pin-shortcut {
        display: inline-flex;
      }
      .topbar {
        padding: 8px 14px;
      }
      .page-container {
        padding: 14px;
      }
      .revision-pill.hide-on-mobile {
        display: none;
      }

      /* 移动端将表格自动转换为触屏友好的高密度卡片列表 */
      .notice-table thead {
        display: none;
      }
      .notice-table, .notice-table tbody, .notice-table tr, .notice-table td {
        display: block;
        width: 100%;
      }
      .notice-table tr {
        padding: 14px;
        border-bottom: 1px solid var(--border-hairline);
      }
      .notice-table td {
        padding: 4px 0;
        border: none;
        white-space: normal;
      }
      .notice-table td[data-label]::before {
        content: attr(data-label) "：";
        font-size: 12px;
        color: var(--text-tertiary);
        font-family: var(--font-sans);
      }
      .row-actions {
        margin-top: 10px;
        padding-top: 10px;
        border-top: 1px dashed var(--border-hairline);
      }

      /* 移动端 Markdown 编辑器切换为单栏「编辑 / 预览」Tab 模式 */
      .editor-mobile-tabs {
        display: inline-flex;
      }
      .editor-split-workbench {
        grid-template-columns: 1fr;
        min-height: 400px;
      }
      .editor-pane {
        border-right: none;
      }
      .editor-split-workbench[data-mobile-mode="edit"] .preview-pane {
        display: none;
      }
      .editor-split-workbench[data-mobile-mode="preview"] .editor-pane {
        display: none;
      }
    }

    @media (max-width: 420px) {
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .recovery-codes-grid {
        grid-template-columns: 1fr;
      }
    }