/* IEV CloudLab Theme Components (v0.1) */
    /* ---- 统一容器宽度 (三个菜单宽度严格一致 1140px) ---- */
    .iev-page-container {
      max-width: var(--iev-page-max-width, 1140px);
      width: 100%;
      margin: 0 auto;
      padding: 32px 24px 64px;
      box-sizing: border-box;
    }

    /* ---- 统一页面标题头规范 ---- */
    .iev-page-header {
      margin-bottom: 28px;
    }
    .iev-page-header .iev-badge-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: 20px;
      background: var(--iev-badge-chip-bg);
      border: 1px solid var(--iev-badge-chip-border);
      color: var(--iev-badge-chip-text);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.02em;
      margin-bottom: 12px;
    }
    .iev-page-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--iev-text-primary);
      letter-spacing: -0.015em;
      margin: 0 0 6px;
      line-height: 1.25;
    }
    .iev-page-sub {
      color: var(--iev-text-secondary);
      font-size: 14px;
      margin: 0;
      line-height: 1.5;
    }

    /* ---- 统一卡片设计规范 ---- */
    .iev-card {
      background: var(--iev-card-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: 20px;
      border: 1px solid var(--iev-card-border);
      box-shadow: var(--iev-card-shadow);
      padding: 32px 32px;
      margin-bottom: 24px;
      position: relative;
      transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }
    .iev-section-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--iev-text-primary);
      margin: 0 0 6px;
      letter-spacing: -0.01em;
    }
    .iev-section-sub {
      color: var(--iev-text-muted);
      font-size: 13px;
      margin: 0 0 20px;
      line-height: 1.45;
    }

    /* ---- 统一表单输入组件 ---- */
    .iev-input, 
    .form-control, 
    .form-select {
      background-color: var(--iev-input-bg) !important;
      border: 1.5px solid var(--iev-input-border) !important;
      color: var(--iev-input-text) !important;
      border-radius: 12px !important;
      padding: 10px 14px !important;
      font-size: 14px !important;
      transition: all 0.18s ease !important;
    }
    .iev-input:focus, 
    .form-control:focus, 
    .form-select:focus {
      border-color: var(--iev-input-focus-border) !important;
      box-shadow: 0 0 0 3.5px var(--iev-input-focus-ring) !important;
      outline: none !important;
    }
    .iev-input::placeholder,
    .form-control::placeholder {
      color: var(--iev-text-muted) !important;
      opacity: 0.8;
    }

    /* ---- 统一主按钮与操作按钮 ---- */
    .iev-btn-primary, 
    .btn-jupyter, 
    .btn-primary {
      background: linear-gradient(135deg, #155eef 0%, #003eb3 100%) !important;
      border: none !important;
      color: #ffffff !important;
      border-radius: 12px !important;
      padding: 10px 24px !important;
      font-weight: 600 !important;
      font-size: 14px !important;
      letter-spacing: 0.01em !important;
      box-shadow: 0 4px 14px rgba(21, 94, 239, 0.28) !important;
      transition: all 0.18s ease !important;
      text-decoration: none !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }
    .iev-btn-primary:hover, 
    .btn-jupyter:hover, 
    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(21, 94, 239, 0.4) !important;
      transform: translateY(-1px);
      color: #ffffff !important;
    }
    .iev-btn-danger-pill,
    .btn-danger-pill {
      background: rgba(239, 68, 68, 0.1) !important;
      border: 1px solid rgba(239, 68, 68, 0.25) !important;
      color: #ef4444 !important;
      border-radius: 8px !important;
      font-size: 12.5px !important;
      font-weight: 600 !important;
      padding: 4px 14px !important;
      transition: all 0.18s ease !important;
      text-decoration: none !important;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .iev-btn-danger-pill:hover,
    .btn-danger-pill:hover {
      background: rgba(239, 68, 68, 0.18) !important;
      border-color: #ef4444 !important;
      color: #dc2626 !important;
    }

    /* ---- 统一表格设计规范 ---- */
    .table {
      background-color: var(--iev-table-bg) !important;
      color: var(--iev-text-primary) !important;
      border-color: var(--iev-table-border) !important;
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 0;
    }
    .table thead th {
      background-color: var(--iev-table-head) !important;
      color: var(--iev-table-head-text) !important;
      font-size: 12.5px !important;
      font-weight: 700 !important;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      padding: 12px 16px !important;
      border-bottom: 1.5px solid var(--iev-table-border) !important;
      vertical-align: middle;
    }
    .table tbody td {
      padding: 14px 16px !important;
      vertical-align: middle !important;
      border-bottom: 1px solid var(--iev-table-border) !important;
      color: var(--iev-text-primary) !important;
      font-size: 13.5px !important;
      background-color: transparent !important;
    }
    .table tbody tr:hover td {
      background-color: var(--iev-table-hover) !important;
    }

    /* ---- IEV 顶栏磨砂玻璃与品牌设计 ---- */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: var(--iev-nav-bg) !important;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--iev-nav-border);
      box-shadow: 0 1px 3px 0 rgba(15, 23, 42, 0.03), 0 4px 12px -2px rgba(15, 23, 42, 0.03);
      padding: 10px 0;
      margin-bottom: 0 !important;
      transition: background-color 0.2s ease, border-color 0.2s ease;
    }
    .navbar-brand {
      padding: 0;
      display: inline-flex;
      align-items: center;
    }
    .brand-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      margin-right: 12px;
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), filter 0.25s ease;
      filter: drop-shadow(0 2px 4px rgba(21, 94, 239, 0.15));
    }
    .brand-logo:hover {
      transform: scale(1.03) translateY(-1px);
      filter: drop-shadow(0 4px 8px rgba(0, 212, 255, 0.3));
    }
    .brand-title-wrap {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .brand-title {
      font-weight: 800;
      font-size: 17.5px;
      color: var(--iev-brand-title);
      letter-spacing: -0.01em;
      line-height: 1.2;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .brand-tag {
      font-size: 10.5px;
      font-weight: 700;
      padding: 1.5px 6px;
      border-radius: 6px;
      background: var(--iev-badge-chip-bg);
      color: var(--iev-badge-chip-text);
      border: 1px solid var(--iev-badge-chip-border);
      letter-spacing: 0.02em;
    }
    .brand-subtitle {
      font-size: 11.5px;
      color: var(--iev-text-muted);
      line-height: 1.3;
      margin-top: 1px;
      letter-spacing: 0.01em;
    }

    /* 统一导航链接风格与高亮选中 */
    .navbar-nav .nav-link {
      font-size: 14.5px;
      font-weight: 600;
      color: var(--iev-text-secondary) !important;
      padding: 7px 16px !important;
      border-radius: 10px;
      transition: all 0.18s ease;
      margin: 0 3px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-nav .nav-link:hover {
      color: #155eef !important;
      background: rgba(21, 94, 239, 0.06);
    }
    .navbar-nav .nav-link.active {
      color: #155eef !important;
      background: rgba(21, 94, 239, 0.1);
      font-weight: 700;
    }
    [data-bs-theme="dark"] .navbar-nav .nav-link {
      color: #cbd5e1 !important;
    }
    [data-bs-theme="dark"] .navbar-nav .nav-link:hover {
      color: #00d4ff !important;
      background: rgba(0, 212, 255, 0.08);
    }
    [data-bs-theme="dark"] .navbar-nav .nav-link.active {
      color: #00d4ff !important;
      background: rgba(0, 212, 255, 0.15);
      font-weight: 700;
    }
    .navbar-nav .nav-link.iev-nav-lab-link {
      background: linear-gradient(135deg, rgba(21, 94, 239, 0.1) 0%, rgba(0, 212, 255, 0.12) 100%) !important;
      border: 1px solid rgba(21, 94, 239, 0.25) !important;
      color: #155eef !important;
      font-weight: 700 !important;
      margin-left: 6px;
    }
    .navbar-nav .nav-link.iev-nav-lab-link:hover {
      background: linear-gradient(135deg, rgba(21, 94, 239, 0.2) 0%, rgba(0, 212, 255, 0.22) 100%) !important;
      border-color: #155eef !important;
      transform: translateY(-1px);
    }
    [data-bs-theme="dark"] .navbar-nav .nav-link.iev-nav-lab-link {
      background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(21, 94, 239, 0.2) 100%) !important;
      border-color: rgba(0, 212, 255, 0.35) !important;
      color: #00d4ff !important;
    }

    /* 用户徽标与退出按钮 */
    .user-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(21, 94, 239, 0.08);
      color: #155eef;
      border: 1px solid rgba(21, 94, 239, 0.18);
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      margin-right: 6px;
    }
    [data-bs-theme="dark"] .user-pill {
      background: rgba(0, 212, 255, 0.1);
      color: #00d4ff;
      border-color: rgba(0, 212, 255, 0.25);
    }
    .btn-logout {
      font-size: 13px;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 8px;
      color: #dc2626;
      border: 1px solid rgba(220, 38, 38, 0.2);
      background: var(--iev-card-bg);
      transition: all 0.15s ease;
      text-decoration: none;
    }
    .btn-logout:hover {
      background: rgba(220, 38, 38, 0.08);
      border-color: #dc2626;
      color: #dc2626;
      text-decoration: none;
    }
    #iev-lang-btn::after {
      display: none !important;
    }
    #iev-lang-btn:hover {
      border-color: #155eef !important;
      color: #155eef !important;
    }
    [data-bs-theme="dark"] #iev-lang-btn:hover {
      border-color: #00d4ff !important;
      color: #00d4ff !important;
    }
    .iev-lang-opt:hover {
      background: rgba(21, 94, 239, 0.08) !important;
      color: #155eef !important;
    }
    [data-bs-theme="dark"] .iev-lang-opt:hover {
      background: rgba(0, 212, 255, 0.12) !important;
      color: #00d4ff !important;
    }
    .iev-lang-opt.active {
      font-weight: 700 !important;
      color: #155eef !important;
    }
    [data-bs-theme="dark"] .iev-lang-opt.active {
      color: #00d4ff !important;
    }
    .lang-check {
      display: none !important;
    }
    .iev-lang-opt.active .lang-check {
      display: inline !important;
    }

    /* 移动端菜单美化 */
    @media (max-width: 575.98px) {
      .navbar-collapse {
        background: var(--iev-card-bg);
        border: 1px solid var(--iev-card-border);
        border-radius: 16px;
        margin-top: 12px;
        padding: 12px 16px 16px;
        box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.15);
      }
      .navbar-collapse .navbar-nav .nav-item { padding: 3px 0; }
      .navbar-collapse .navbar-nav .nav-link {
        font-size: 15px;
        padding: 10px 12px !important;
      }
      .navbar-collapse ul.nav.navbar-nav.me-2 {
        flex-direction: row;
        align-items: center;
        gap: 10px;
        border-top: 1px solid var(--iev-table-border);
        margin-top: 10px;
        padding-top: 12px;
      }
      #login_widget { display: flex; align-items: center; gap: 8px; }
    }
    @media (min-width: 576px) {
      .navbar-nav.me-2 { align-items: center; }
    }

    /* 底部通用 Footer */
    .iev-footer {
      margin-top: auto;
      padding: 24px 16px;
      text-align: center;
      background: var(--iev-footer-bg);
      border-top: 1px solid var(--iev-footer-border);
      color: var(--iev-text-muted);
      font-size: 12.5px;
    }
    .iev-footer-status {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 4px 14px;
      border-radius: 20px;
      background: rgba(16, 185, 129, 0.08);
      border: 1px solid rgba(16, 185, 129, 0.22);
      color: #047857;
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    [data-bs-theme="dark"] .iev-footer-status {
      background: rgba(16, 185, 129, 0.12);
      border-color: rgba(16, 185, 129, 0.3);
      color: #10b981;
    }
    .iev-status-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #10b981;
      box-shadow: 0 0 8px #10b981;
      animation: iev-pulse-dot 2s infinite;
    }
    @keyframes iev-pulse-dot {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.85); }
      100% { opacity: 1; transform: scale(1); }
    }

    /* ---- 双核驾驶舱与快捷启动卡片 (v1.0) ---- */
    .iev-launchpad-card {
      transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, border-color 0.2s ease !important;
    }
    .iev-launchpad-card:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px -4px rgba(15, 23, 42, 0.08) !important;
    }
    .iev-launchpad-card.student-card:hover {
      border-color: #2563eb !important;
    }
    .iev-launchpad-card.capstone-card:hover {
      border-color: #5e35b1 !important;
    }
    .iev-launchpad-card.teacher-card:hover {
      border-color: #059669 !important;
    }
    [data-bs-theme="dark"] .iev-launchpad-card {
      background: rgba(17, 24, 39, 0.75) !important;
    }
    [data-bs-theme="dark"] .iev-launchpad-card:hover {
      box-shadow: 0 12px 28px -4px rgba(0, 0, 0, 0.4) !important;
    }

    /* ---- V1.0 认证徽标 ---- */
    .iev-pill-ver {
      display: inline-flex;
      align-items: center;
      gap: 3px;
      line-height: 1;
    }