:root {
        --bg-color: #181818;
        --panel-color: #252525;
        --item-color: #333;
        --text-color: #e0e0e0;
        --accent-color: #00bcd4;
        --danger-color: #e74c3c;
      }

      body {
        font-family: "Segoe UI", sans-serif;
        background-color: var(--bg-color);
        color: var(--text-color);
        margin: 0;
        display: flex;
        flex-direction: row;
        position: fixed;
        width: 100%;
        height: 100vh;
        height: 100dvh;
        overflow: hidden;
        user-select: none;
        -webkit-user-select: none;
        touch-action: none;
      }

      body.layout-left .sidebar {
        order: -1;
        border-right: 1px solid #333;
        border-left: none;
        box-shadow: 4px 0 10px rgba(0, 0, 0, 0.3);
      }

      body.layout-left .viewport {
        order: 1;
      }

      .modal-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.75);
        z-index: 3000;
        display: flex;
        justify-content: center;
        align-items: center;
        backdrop-filter: blur(3px);
        animation: fadeIn 0.3s ease;
      }

      .modal-content {
        background: #252525;
        padding: 25px;
        border-radius: 8px;
        width: 90%;
        max-width: 420px;
        position: relative;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
        border: 1px solid #444;
        color: #e0e0e0;
        animation: slideUp 0.3s ease;
      }

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

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

      .close-modal {
        position: absolute;
        top: 12px;
        right: 15px;
        background: none;
        border: none;
        color: #888;
        font-size: 28px;
        cursor: pointer;
        padding: 0;
        line-height: 1;
      }

      .modal-header {
        font-size: 18px;
        font-weight: bold;
        margin-bottom: 20px;
        color: var(--accent-color);
        border-bottom: 1px solid #333;
        padding-bottom: 10px;
      }

      .modal-body p {
        margin: 12px 0;
        font-size: 14px;
        line-height: 1.6;
      }

      .modal-body a {
        color: var(--accent-color);
        text-decoration: none;
        border-bottom: 1px dashed rgba(0, 188, 212, 0.3);
      }

      .disclaimer {
        color: #aaa;
        font-size: 13px;
        background: rgba(0, 0, 0, 0.2);
        padding: 12px;
        border-radius: 4px;
        border-left: 3px solid var(--danger-color);
        margin-top: 15px;
      }

      /* 视频设置相关样式 */
      .form-group {
        margin-bottom: 15px;
      }
      .form-group label {
        display: block;
        margin-bottom: 5px;
        font-size: 13px;
        color: #ccc;
      }
      .form-select,
      .form-input {
        width: 100%;
        background: #333;
        border: 1px solid #555;
        color: #fff;
        padding: 8px;
        border-radius: 4px;
        font-size: 14px;
        outline: none;
        height: 36px;
      }
      .modal-footer {
        margin-top: 20px;
        display: flex;
        justify-content: flex-end;
        gap: 10px;
      }
      .primary-btn {
        background: var(--accent-color);
        color: #000;
        border: none;
        padding: 8px 16px;
        border-radius: 4px;
        font-weight: bold;
        cursor: pointer;
      }
      .primary-btn:hover {
        background: #00acc1;
      }
      .primary-btn:disabled {
        background: #555;
        cursor: not-allowed;
        color: #888;
      }

      /* 简单的加载动画 */
      .spinner {
        border: 4px solid rgba(255, 255, 255, 0.1);
        width: 36px;
        height: 36px;
        border-radius: 50%;
        border-left-color: var(--accent-color);
        animation: spin 1s linear infinite;
        margin: 20px auto;
      }
      @keyframes spin {
        0% {
          transform: rotate(0deg);
        }
        100% {
          transform: rotate(360deg);
        }
      }

      .viewport {
        flex: 1;
        position: relative;
        background-color: #111;
        overflow: hidden;
        background-image:
          linear-gradient(45deg, #1a1a1a 25%, transparent 25%),
          linear-gradient(-45deg, #1a1a1a 25%, transparent 25%),
          linear-gradient(45deg, transparent 75%, #1a1a1a 75%),
          linear-gradient(-45deg, transparent 75%, #1a1a1a 75%);
        background-size: 20px 20px;
        cursor: none;
        min-width: 300px;
        touch-action: none;
        order: 0;
      }

      .viewport.panning {
        cursor: grab !important;
      }
      .viewport.panning:active {
        cursor: grabbing !important;
      }
      .viewport.erasing {
        cursor:
          url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='%23e74c3c' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M3 6h18M19 6v14a2 2 0 01-2 2H7a2 2 0 01-2-2V6m3 0V4a2 2 0 012-2h4a2 2 0 012 2v2'/></svg>")
            12 12,
          auto !important;
      }
      .viewport.rotating {
        cursor:
          url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%23fff' stroke='%23000' stroke-width='0.5'><path d='M12 4V1L8 5l4 4V6c3.31 0 6 2.69 6 6 0 1.01-.25 1.97-.7 2.8l1.46 1.46C19.54 15.03 20 13.57 20 12c0-4.42-3.58-8-8-8zm0 14c-3.31 0-6-2.69-6-6 0-1.01.25-1.97.7-2.8L5.24 7.74C4.46 8.97 4 10.43 4 12c0 4.42 3.58 8 8 8v3l4-4-4-4v3z'/></svg>")
            12 12,
          grab !important;
      }

      #mainCanvas {
        display: block;
        width: 100%;
        height: 100%;
        touch-action: none;
      }

      .save-indicator {
        position: absolute;
        top: 10px;
        left: 10px;
        z-index: 100;
        font-size: 12px;
        opacity: 0.8;
        pointer-events: none;
        display: flex;
        align-items: center;
        gap: 5px;
        background: rgba(0, 0, 0, 0.5);
        padding: 4px 8px;
        border-radius: 20px;
      }
      .dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: #555;
      }
      .dot.unsaved {
        background: var(--danger-color);
        box-shadow: 0 0 5px var(--danger-color);
      }
      .dot.saved {
        background: var(--accent-color);
      }

      .sidebar {
        width: 340px;
        background-color: var(--panel-color);
        border-left: 1px solid #333;
        display: flex;
        flex-direction: column;
        z-index: 10;
        box-shadow: -4px 0 10px rgba(0, 0, 0, 0.3);
        cursor: default;
        order: 1;
        flex-shrink: 0;
      }

      .scroll-area {
        flex: 1;
        overflow-y: auto;
        padding: 8px;
      }
      .scroll-area::-webkit-scrollbar {
        width: 5px;
        background: #222;
      }

      .panel-section {
        margin-bottom: 8px;
        background: var(--item-color);
        padding: 8px;
        border-radius: 6px;
      }
      .section-header {
        font-size: 10px;
        font-weight: bold;
        text-transform: uppercase;
        color: #888;
        border-bottom: 1px solid #444;
        padding-bottom: 4px;
        margin-bottom: 6px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: nowrap;
      }
      .section-header > div {
        display: flex;
        flex-shrink: 0;
      }

      input[type="text"] {
        min-width: 60px;
      }
      .row {
        display: flex;
        gap: 8px;
        align-items: center;
        margin-bottom: 4px;
        min-height: 24px;
        flex-wrap: nowrap;
      }
      .row > span,
      .row > label {
        white-space: nowrap;
        flex-shrink: 0;
      }

      .btn-group {
        display: flex;
        width: 100%;
        gap: 1px;
        background: #222;
        border-radius: 4px;
        overflow: hidden;
      }
      .btn-group-full {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
        margin-top: 8px;
        align-items: center;
      }

      button,
      .btn-label {
        background-color: #444;
        color: #ddd;
        border: none;
        padding: 4px 8px;
        cursor: pointer;
        flex: 1;
        font-size: 11px;
        transition: 0.1s;
        text-align: center;
        display: inline-block;
        border-radius: 3px;
        white-space: nowrap;
        flex-shrink: 0;
        min-height: 28px;
        outline: none !important;
        -webkit-tap-highlight-color: transparent;
        line-height: 20px;
        box-sizing: border-box;
      }

      .btn-group-full:last-of-type {
        display: flex;
        gap: 5px;
        margin-top: 5px;
      }
      .btn-group-full:last-of-type label.json-btn {
        flex: 2;
        min-width: 0;
      }
      .btn-group-full:last-of-type button.reset-btn {
        flex: 1;
        min-width: 80px;
      }

      button:hover,
      .btn-label:hover {
        background-color: #555;
      }
      button.active,
      .btn-label.active {
        background-color: var(--accent-color);
        color: #000;
        font-weight: bold;
      }
      button.small-btn {
        padding: 4px 8px;
        flex: 0 0 auto;
      }
      button.json-btn,
      .btn-label.json-btn {
        background: #9b59b6;
        color: #fff;
      }
      button.json-btn:hover,
      .btn-label.json-btn:hover {
        background: #8e44ad;
      }
      button.reset-btn {
        background: #e74c3c;
        color: #fff;
      }
      button.reset-btn:hover {
        background: #c0392b;
      }

      input[type="range"] {
        -webkit-appearance: none;
        width: 100%;
        height: 20px;
        background: transparent;
        cursor: pointer;
        outline: none;
      }
      input[type="range"]::-webkit-slider-runnable-track {
        width: 100%;
        height: 4px;
        background: #555;
        border-radius: 2px;
      }
      input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        height: 16px;
        width: 16px;
        border-radius: 50%;
        background: var(--accent-color);
        margin-top: -6px;
      }

      input[type="text"] {
        flex: 1;
        background: #333;
        border: 1px solid #555;
        color: #fff;
        font-size: 12px;
        padding: 1px 4px;
        border-radius: 2px;
        outline: none;
        min-width: 100px;
      }
      input[type="file"],
      input[type="checkbox"].visually-hidden {
        opacity: 0;
        width: 0;
        height: 0;
        position: absolute;
      }

      .color-swatch-wrapper {
        width: 20px;
        height: 20px;
        border-radius: 4px;
        overflow: hidden;
        cursor: pointer;
        border: 1px solid #555;
        flex-shrink: 0;
      }
      .color-swatch {
        width: 100%;
        height: 100%;
        background: #fff;
      }

      .layer-list {
        display: flex;
        flex-direction: column;
        gap: 4px;
        max-height: 200px;
        overflow-y: auto;
        background: #222;
        border-radius: 4px;
        padding: 4px;
      }
      .layer-item {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 3px 6px;
        background: #333;
        color: #aaa;
        cursor: grab;
        border: 1px solid transparent;
        border-radius: 3px;
        font-size: 11px;
        min-height: 26px;
      }
      .layer-item.active {
        background: #444;
        color: #fff;
        border-color: var(--accent-color);
      }
      .layer-vis {
        cursor: pointer;
        width: 20px;
        text-align: center;
      }

      /* --- 新增样式 START --- */
      .layer-pin {
        cursor: pointer;
        width: 20px;
        text-align: center;
        font-size: 12px;
        opacity: 0.3;
        transition: opacity 0.2s;
        user-select: none;
      }
      .layer-pin.active {
        opacity: 1;
        text-shadow: 0 0 5px var(--accent-color);
      }
      .layer-pin:hover {
        opacity: 0.8;
      }
      /* --- 新增样式 END --- */

      .layer-name {
        flex: 1;
        user-select: none;
        padding-left: 4px; /*稍微调整一下间距*/
      }
      .layer-move-btn {
        padding: 0 4px;
        width: auto;
        min-width: 20px;
        font-size: 10px;
        background: transparent;
        color: #666;
        flex: 0 0 auto;
      }

      .shortcut-panel {
        position: absolute;
        bottom: 20px;
        left: auto;
        right: 10px;
        background: rgba(0, 0, 0, 0.9);
        padding: 8px 15px;
        border-radius: 6px;
        font-size: 12px;
        color: #ccc;
        z-index: 200;
        display: flex;
        flex-direction: column;
        gap: 5px;
        border: 1px solid #555;
        transition: 0.2s;
        width: 140px;
        cursor: default;
      }
      .shortcut-panel.expanded {
        width: auto;
        left: 10px;
        right: 10px;
      }
      .shortcut-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid #444;
        padding-bottom: 4px;
        color: var(--accent-color);
        font-size: 11px;
      }
      .shortcut-toggle {
        background: none;
        border: none;
        color: #888;
        cursor: pointer;
        font-size: 14px;
        padding: 0 8px;
        width: auto;
      }
      .shortcut-content {
        display: none;
        flex-wrap: wrap;
        gap: 15px;
        justify-content: center;
      }
      .shortcut-panel.expanded .shortcut-content {
        display: flex;
      }

      .rotation-control {
        position: absolute;
        top: 50px;
        right: 15px;
        width: 60px;
        height: 60px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        background: rgba(0, 0, 0, 0.5);
        border-radius: 50%;
        cursor: grab;
        z-index: 150;
        backdrop-filter: blur(2px);
        touch-action: none;
      }
      .rotation-control::before {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        width: 2px;
        height: 50%;
        background: var(--accent-color);
        transform-origin: bottom center;
        transform: translateX(-50%);
      }

      .toast-message {
        position: absolute;
        bottom: 120px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.8);
        color: white;
        padding: 8px 16px;
        border-radius: 20px;
        font-size: 14px;
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.3s;
        z-index: 5000;
        border: 1px solid #444;
        backdrop-filter: blur(4px);
      }
      .toast-message.show {
        opacity: 1;
      }

      #colorPickerOverlay {
        display: none;
      }
      .color-picker-box {
        position: fixed;
        z-index: 5000;
        background: rgba(37, 37, 37, 0.98);
        border: 1px solid #666;
        border-radius: 8px;
        padding: 15px;
        width: 260px;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
        display: flex;
        flex-direction: column;
        gap: 10px;
        color: #ddd;
        font-size: 12px;
      }
      .cp-row {
        display: flex;
        gap: 10px;
      }
      .cp-canvas-wrap {
        position: relative;
        width: 190px;
        height: 190px;
        cursor: crosshair;
        touch-action: none;
      }
      .cp-hue-wrap {
        position: relative;
        width: 25px;
        height: 190px;
        cursor: pointer;
        touch-action: none;
      }
      #cpSatValCanvas,
      #cpHueCanvas {
        border-radius: 4px;
        border: 1px solid #000;
        width: 100%;
        height: 100%;
      }
      .cp-pointer {
        position: absolute;
        width: 10px;
        height: 10px;
        border: 2px solid #fff;
        border-radius: 50%;
        transform: translate(-50%, -50%);
        pointer-events: none;
        box-shadow: 0 0 2px #000;
      }
      .cp-hue-slider {
        position: absolute;
        left: -2px;
        width: 100%;
        height: 6px;
        border: 2px solid #fff;
        border-radius: 2px;
        transform: translateY(-50%);
        pointer-events: none;
      }
      .cp-preview {
        width: 40px;
        height: 24px;
        border: 1px solid #444;
        border-radius: 4px;
      }
      .cp-input {
        flex: 1;
        background: #333;
        border: 1px solid #555;
        color: #fff;
        padding: 4px;
        border-radius: 3px;
        text-transform: uppercase;
        text-align: center;
        font-family: monospace;
      }

      .sidebar-footer {
        flex-shrink: 0;
        padding: 8px;
        background-color: var(--panel-color);
        border-top: 1px solid #333;
        text-align: center;
        z-index: 20;
        display: flex;
        gap: 5px;
      }
      .sidebar-footer .text-btn {
        background: none !important;
        border: none;
        color: #888;
        font-size: 11px;
        cursor: pointer;
        padding: 6px 0;
        width: 100%;
        opacity: 0.8;
        transition: 0.2s;
      }
      .sidebar-footer .text-btn:hover {
        background-color: rgba(255, 255, 255, 0.05) !important;
        color: var(--accent-color);
        opacity: 1;
      }

      .floating-bubble {
        position: absolute; /* 相对于 viewport 定位 */
        bottom: 20px; /* 距离底部 20px */
        left: 50%; /* 水平居中 */
        transform: translateX(-50%); /* 精确居中 */

        display: flex;
        gap: 5px;
        background: rgba(37, 37, 37, 0.9);
        padding: 6px;
        border-radius: 30px;
        z-index: 2000;
        border: 1px solid #555;
        backdrop-filter: blur(4px);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
      }

      .floating-bubble button {
        background-color: #444;
        color: #ddd;
        border: none;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        font-size: 18px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: background-color 0.2s;
        flex-shrink: 0;
      }

      .floating-bubble button:hover {
        background-color: #555;
      }

      .floating-bubble button#selectionConfirmBtn {
        background-color: var(--accent-color);
        color: #000;
      }

      .floating-bubble button#selectionCancelBtn {
        background-color: var(--danger-color);
        color: #fff;
      }

      @media (max-width: 1024px) {
        .sidebar {
          width: 280px;
        }
        .color-picker-box {
          width: 250px;
        }
        .cp-canvas-wrap {
          width: 180px;
          height: 180px;
        }
        .cp-hue-wrap {
          height: 180px;
        }
        button,
        .btn-label {
          min-height: 32px;
        }
      }