* {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
        font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      }

      body {
        background: #f2f7f5;
        color: #475d5b;
        min-height: 100vh;
      }

      h1 {
        text-align: center;
        margin-bottom: 20px;
        color: #00473e;
        font-size: 32px;
        font-weight: 600;
      }

      .description {
        text-align: center;
        margin-bottom: 30px;
        color: #475d5b;
        font-size: 18px;
        line-height: 1.6;
      }

      .content {
        --one-cell: 200px;
        --border-color: rgba(0, 51, 44, 0.1);
        display: flex;
        flex-direction: row;
        gap: 20px;
        flex: 1;
        height: 100vh;
        padding: 15px 20px;
        position: relative;
      }

      .content::before {
        content: "";
        pointer-events: none;
        position: absolute;
        z-index: 0;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(-90deg,
            rgba(0, 51, 44, 0.05) 1px,
            transparent 1px),
          linear-gradient(rgba(0, 51, 44, 0.05) 1px, transparent 1px),
          linear-gradient(-90deg, rgba(0, 51, 44, 0.04) 1px, transparent 1px),
          linear-gradient(rgba(0, 51, 44, 0.04) 1px, transparent 1px),
          linear-gradient(transparent 3px,
            var(--border-color) 3px,
            var(--border-color) calc(var(--one-cell) - 2px),
            transparent calc(var(--one-cell) - 2px)),
          linear-gradient(-90deg, var(--border-color) 1px, transparent 1px),
          linear-gradient(-90deg,
            transparent 3px,
            var(--border-color) 3px,
            var(--border-color) calc(var(--one-cell) - 2px),
            transparent calc(var(--one-cell) - 2px)),
          linear-gradient(var(--border-color) 1px, transparent 1px);
        background-size: calc(var(--one-cell) / 10) calc(var(--one-cell) / 10),
          calc(var(--one-cell) / 10) calc(var(--one-cell) / 10),
          var(--one-cell) var(--one-cell), var(--one-cell) var(--one-cell),
          var(--one-cell) var(--one-cell), var(--one-cell) var(--one-cell),
          var(--one-cell) var(--one-cell), var(--one-cell) var(--one-cell);
        background-position: calc(var(--one-cell) * 0.25) -1px;
        backface-visibility: hidden;
      }

      .controls {
        width: 160px;
        display: flex;
        flex-direction: column;
        gap: 20px;
        padding: 10px;
        background-color: #f2f7f5;
        border-radius: 0.25rem;
        border: 1px solid #00332c;
        height: fit-content;
        position: relative;
        z-index: 1;
      }

      .sortable-list {
        display: flex;
        flex-direction: column;
        gap: 10px;
      }

      .mindmap-controls {
        display: flex;
        flex-direction: column;
        gap: 10px;
      }

      .control-row {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
      }

      .sortable-item {
        padding: 6px 12px;
        background-color: #f2f7f5;
        border: 2px dashed #00332c;
        border-radius: 8px;
        cursor: move;
        display: flex;
        align-items: center;
        gap: 10px;
        transition: all 0.3s;
        min-width: 120px;
        justify-content: space-around;
        color: #475d5b;
      }

      .sortable-item:hover {
        background-color: #faae2b;
        border-color: #00473e;
        color: #00473e;
      }

      .sortable-item.dragging {
        opacity: 0.5;
        background-color: #ffa8ba;
      }

      .drag-handle {
        cursor: move;
        color: #475d5b;
        font-size: 18px;
      }

      .category-name {
        font-weight: 600;
        color: #00473e;
      }

      .mindmap-container {
        flex: 1;
        background-color: #f2f7f5;
        border-radius: 0.25rem;
        padding: 10px;
        overflow: auto;
        border: 1px solid #00332c;
        position: relative;
        min-height: 500px;
        opacity: 0.85;
        height: 100%;
        z-index: 1;
      }

      .control-btn {
        padding: 8px 16px;
        background-color: #faae2b;
        color: #00473e;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: background-color 0.3s;
        font-size: 14px;
        white-space: nowrap;
      }

      .control-btn:hover {
        background-color: #ffa8ba;
      }

      .control-btn:active {
        background-color: #fa5246;
      }

      /* 节点标签和checkbox样式 */
      .node-label {
        display: inline-block;
        margin-left: 5px;
        font-size: 14px;
      }

      .node-checkbox {
        margin-left: 8px;
        cursor: pointer;
      }

      .node-content-wrapper {
        display: flex;
        align-items: center;
        gap: 5px;
      }

      /* Toast 消息样式 */
      .toast-container {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 10000;
        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;
      }

      #mindmap {
        width: 100%;
        height: 100%;
        background-color: #f2f7f5;
        border-radius: 8px;
        position: relative;
      }

      .instructions {
        margin-top: 20px;
        padding: 20px;
        background-color: #f2f7f5;
        border-radius: 8px;
      }

      .instructions h3 {
        margin-bottom: 10px;
        color: #00473e;
      }

      .instructions ul {
        padding-left: 20px;
      }

      .instructions li {
        margin-bottom: 8px;
      }

      .reset-btn {
        padding: 12px 20px;
        background-color: #faae2b;
        color: #00473e;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        font-weight: 600;
        transition: background-color 0.3s;
        margin-top: 10px;
      }

      .reset-btn:hover {
        background-color: #ffa8ba;
      }

      /* 层级控制 */
      .level-control {
        display: flex;
        flex-direction: column;
        gap: 8px;
        margin-top: 10px;
      }

      .level-control input[type="number"] {
        width: 60px;
        padding: 4px 6px;
        border: 1px solid #00332c;
        border-radius: 4px;
        font-size: 14px;
        background-color: #f2f7f5;
        color: #475d5b;
      }

      /* 配置按钮 */
      .config-btn {
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 1000;
        color: #00473e;
        background-color: #faae2b;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        font-size: 20px;
        display: none;
      }

      /* Home icon 按钮 */
      .home-btn {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1000;
        width: 40px;
        height: 40px;
        background-color: #faae2b;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        color: #00473e;
        text-decoration: none;
        transition: background-color 0.3s;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
      }

      .home-btn:hover {
        background-color: #ffa8ba;
      }

      .config-btn:hover {
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
      }

      /* 手机端浮动控制面板 */
      .mobile-controls {
        position: fixed;
        top: 0;
        left: -350px;
        width: 160px;
        height: 100vh;
        background-color: #f2f7f5;
        border-right: 1px solid #00332c;
        padding: 25px 10px 10px 10px;
        z-index: 999;
        transition: left 0.3s ease;
        overflow-y: auto;
        box-shadow: 2px 0 10px rgba(0, 51, 44, 0.1);
      }

      .mobile-controls.show {
        left: 0;
      }

      .mobile-controls-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 51, 44, 0.5);
        z-index: 998;
        display: none;
      }

      .mobile-controls-overlay.show {
        display: block;
      }

      @media (max-width: 768px) {
        .content {
          flex-direction: column;
          height: 100vh;
          gap: 0;
          padding: 0;
        }

        .controls {
          display: none;
        }

        .config-btn {
          display: block;
        }

        .mindmap-container {
          flex: 1;
          min-height: calc(100vh - 60px);
          padding: 0px;
          border-radius: 6px;
          opacity: 0.85;
          border: none;
          margin: 10px;
        }

        .mobile-controls .sortable-list {
          margin-bottom: 20px;
        }

        .mobile-controls .sortable-item {
          padding: 12px 16px;
          font-size: 14px;
        }

        .mobile-controls .control-btn {
          width: 100%;
          margin-bottom: 8px;
        }
      }