/* 全局样式 */
      body {
        min-height: 100vh;
        font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
          Roboto, sans-serif;
        background: #f2f7f5;
        color: #475d5b;
      }

      /* 标签页样式 */
      .tab-button {
        position: relative;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        font-weight: 600;
        letter-spacing: 0.025em;
        color: #00473e;
      }

      .tab-button.active {
        color: #00473e;
        background: linear-gradient(
          135deg,
          rgba(0, 71, 62, 0.1) 0%,
          rgba(0, 71, 62, 0.1) 100%
        );
      }

      .tab-button.active::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, #00473e, #475d5b);
        border-radius: 2px 2px 0 0;
      }

      .tab-button:hover:not(.active) {
        background: rgba(250, 174, 43, 0.05);
        transform: translateY(-1px);
        color: #00473e;
      }

      /* 卡片样式 */
      .glass-card {
        background: rgba(242, 247, 245, 0.9);
        backdrop-filter: blur(20px);
        border-radius: 4px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      }

      .glass-card:hover {
        transform: translateY(-4px);
        border-color: rgba(0, 51, 44, 0.3);
      }

      /* 按钮样式 */
      .btn-primary {
        background: linear-gradient(135deg, #faae2b 0%, #ffa8ba 100%);
        border: none;
        color: #00473e;
        font-weight: 600;
        letter-spacing: 0.025em;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 14px rgba(0, 71, 62, 0.3);
      }

      .btn-primary:hover {
        background: linear-gradient(135deg, #ffa8ba 0%, #ffa8ba 100%);
      }

      .btn-success {
        background: linear-gradient(135deg, #faae2b 0%, #ffa8ba 100%);
        border: none;
        color: #00473e;
        font-weight: 600;
        letter-spacing: 0.025em;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 14px rgba(0, 71, 62, 0.3);
      }

      .btn-success:hover {
        background: linear-gradient(135deg, #ffa8ba 0%, #ffa8ba 100%);
      }

      /* 表格样式 */
      .vocabulary-table {
        width: 100%;
        border-collapse: separate;
        border-spacing: 0;
        background: rgba(242, 247, 245, 0.9);
        border-radius: 4px;
        overflow: hidden;
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
      }

      .vocabulary-table th {
        background: linear-gradient(
          135deg,
          rgba(0, 71, 62, 0.1) 0%,
          rgba(250, 174, 43, 0.1) 100%
        );
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.1em;
        font-size: 0.75rem;
        padding: 1.25rem 1.5rem;
        text-align: left;
        color: #00473e;
        border-bottom: 1px solid rgba(0, 51, 44, 0.1);
      }

      .vocabulary-table td {
        padding: 1.25rem 1.5rem;
        border-bottom: 1px solid rgba(0, 51, 44, 0.05);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        color: #00473e;
      }

      .vocabulary-table tr:hover {
        background: rgba(250, 174, 43, 0.05);
        transform: scale(1.01);
      }

      .vocab-japanese {
        font-size: 1.25rem;
        font-weight: 700;
        color: #00473e;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
      }

      .vocab-chinese {
        font-size: 1rem;
        color: #475d5b;
        font-weight: 500;
      }

      .vocab-romaji {
        font-size: 0.875rem;
        color: #475d5b;
        font-style: italic;
        font-weight: 400;
      }

      /* 练习卡片网格 */
      .questions-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
        padding: 2rem;
      }

      @media (max-width: 1024px) {
        .questions-grid {
          grid-template-columns: repeat(3, 1fr);
          gap: 1.25rem;
        }
      }

      @media (max-width: 768px) {
        .questions-grid {
          grid-template-columns: repeat(2, 1fr);
          gap: 1rem;
          padding: 1.5rem;
        }
      }

      @media (max-width: 480px) {
        .questions-grid {
          grid-template-columns: 1fr;
          gap: 1rem;
          padding: 1rem;
        }
      }

      /* 练习卡片 */
      .question-card {
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        padding: 2rem;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 8px 32px rgba(0, 51, 44, 0.08);
        position: relative;
        overflow: hidden;
        height: fit-content;
      }

      .question-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, #475d5b, #faae2b, #f2f7f5);
        border-radius: 4px 4px 0 0;
      }

      .question-card:hover {
        transform: translateY(-8px) scale(1.02);
        box-shadow: 0 20px 40px rgba(0, 51, 44, 0.15);
        border-color: rgba(0, 51, 44, 0.3);
      }

      /* 输入框样式 */
      .glass-input {
        background: rgba(242, 247, 245, 0.8);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        padding: 0.875rem 1.25rem;
        color: #00473e;
        font-size: 1rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 14px rgba(0, 51, 44, 0.05);
      }

      .glass-input:focus {
        outline: none;
        border-color: #00473e;
        box-shadow: 0 0 0 3px rgba(0, 71, 62, 0.1),
          0 8px 25px rgba(0, 51, 44, 0.1);
        background: rgba(242, 247, 245, 0.95);
      }

      .glass-input::placeholder {
        color: #475d5b;
      }

      /* 选择器样式 */
      .glass-select {
        background: rgba(242, 247, 245, 0.8);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        padding: 0.875rem 1.25rem;
        color: #00473e;
        font-size: 1rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 14px rgba(0, 51, 44, 0.05);
      }

      .glass-select:focus {
        outline: none;
        border-color: #00473e;
        box-shadow: 0 0 0 3px rgba(0, 71, 62, 0.1);
      }

      /* 模态框样式 */
      .modal-overlay {
        background: rgba(0, 51, 44, 0.6);
        backdrop-filter: blur(8px);
      }

      .modal-content {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        box-shadow: 0 25px 50px -12px rgba(0, 51, 44, 0.3);
        color: #00473e;
      }

      /* 统计徽章 */
      .stat-badge {
        background: linear-gradient(
          135deg,
          rgba(0, 71, 62, 0.2) 0%,
          rgba(0, 71, 62, 0.2) 100%
        );
        border: 1px solid rgba(0, 71, 62, 0.3);
        color: #00473e;
        font-weight: 600;
        font-size: 0.75rem;
        padding: 0.25rem 0.75rem;
        border-radius: 4px;
        backdrop-filter: blur(10px);
      }

      /* 练习来源卡片 */
      .source-card {
        background: rgba(242, 247, 245, 0.8);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        padding: 1.5rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        cursor: pointer;
      }

      .source-card:hover {
        background: rgba(242, 247, 245, 0.9);
        border-color: rgba(0, 51, 44, 0.3);
        transform: translateY(-2px);
      }

      .source-card input[type="checkbox"]:checked + .source-card {
        background: linear-gradient(
          135deg,
          rgba(107, 114, 128, 0.1) 0%,
          rgba(107, 114, 128, 0.1) 100%
        );
        border-color: #00473e;
      }

      /* 分页器样式 */
      .pagination-btn {
        background: rgba(242, 247, 245, 0.8);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        color: #00473e;
        border-radius: 4px;
        padding: 0.75rem 1.25rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        font-weight: 600;
      }

      .pagination-btn:hover:not(:disabled) {
        background: rgba(242, 247, 245, 0.9);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 51, 44, 0.1);
        color: #00473e;
      }

      .pagination-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
      }

      .pagination-btn.active {
        background: linear-gradient(135deg, #faae2b 0%, #ffa8ba 100%);
        border-color: #00473e;
        color: #00473e;
        box-shadow: 0 4px 14px rgba(0, 71, 62, 0.3);
      }

      /* 标题样式 */
      .page-title {
        background: linear-gradient(135deg, #00473e 0%, #475d5b 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        font-weight: 800;
        text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      }

      /* 筛选器样式 */
      .filter-container {
        background: rgba(242, 247, 245, 0.8);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(0, 51, 44, 0.2);
        border-radius: 4px;
        padding: 2rem;
        box-shadow: 0 8px 32px rgba(0, 51, 44, 0.08);
      }

      /* 标签样式 */
      .filter-container label {
        color: #00473e;
        font-weight: 600;
      }

      /* 响应式调整 */
      @media (max-width: 768px) {
        .questions-grid {
          padding: 1rem;
        }

        .question-card {
          padding: 1.5rem;
        }
      }

      /* 自定义样式 */
      .gradient-bg {
        background: linear-gradient(135deg, #faae2b 0%, #f2f7f5 100%);
      }

      .card-hover {
        transition: all 0.3s ease;
      }

      .card-hover:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(0, 51, 44, 0.1);
      }

      .question-card:hover {
        background: linear-gradient(135deg, #faae2b 0%, #f2f7f5 100%);
      }

      .progress-bar {
        background: linear-gradient(90deg, #00473e, #475d5b);
      }

      .btn-primary {
        background: linear-gradient(135deg, #faae2b 0%, #ffa8ba 100%);
        transition: all 0.3s ease;
      }

      .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(0, 71, 62, 0.4);
      }

      .btn-success {
        background: linear-gradient(135deg, #faae2b 0%, #ffa8ba 100%);
      }

      .btn-danger {
        background: linear-gradient(135deg, #ffa8ba 0%, #ffa8ba 100%);
      }

      .table-row:hover {
        background-color: rgba(250, 174, 43, 0.05);
      }

      .selected-row {
        background-color: rgba(250, 174, 43, 0.1) !important;
      }

      .modal-overlay {
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(4px);
      }

      .modal-content {
        animation: modalSlideIn 0.3s ease-out;
      }

      @keyframes modalSlideIn {
        from {
          opacity: 0;
          transform: translateY(-20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      .fade-in {
        animation: fadeIn 0.5s ease-in;
      }

      @keyframes fadeIn {
        from {
          opacity: 0;
        }
        to {
          opacity: 1;
        }
      }

      /* 自定义消息提示样式 */
      .toast-container {
        position: fixed;
        top: 20px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 2000;
        display: flex;
        flex-direction: column;
        gap: 10px;
        pointer-events: none;
      }

      .toast-message {
        background: #1f2937;
        color: #fff;
        padding: 12px 20px;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        min-width: 300px;
        max-width: 500px;
        animation: slideDown 0.3s ease-out;
        pointer-events: auto;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
      }

      .toast-message.success {
        background: #10b981;
      }

      .toast-message.error {
        background: #ef4444;
      }

      .toast-message.warning {
        background: #f59e0b;
      }

      .toast-message.info {
        background: #3b82f6;
      }

      @keyframes slideDown {
        from {
          opacity: 0;
          transform: translateY(-20px);
        }
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      .toast-close {
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: #fff;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        padding: 0;
        font-size: 14px;
        line-height: 1;
        transition: background 0.2s;
      }

      .toast-close:hover {
        background: rgba(255, 255, 255, 0.3);
      }

      .toast-content {
        flex: 1;
        word-wrap: break-word;
      }