.pro-upload-area {
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px dashed #2196F3;
    border-radius: 12px;
    background: linear-gradient(135deg, #f5f9ff, #e8f4ff);
    margin: 30px auto;
    max-width: 500px;
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pro-upload-area:hover {
    border-color: #1976D2;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.15);
}

.pro-upload-area .pro-upload-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.pro-upload-area .pro-upload-icon {
    font-size: 56px;
    color: #2196F3;
    margin-bottom: 8px;
}

.pro-upload-area .pro-upload-text {
    font-size: 18px;
    color: #1976D2;
    font-weight: 500;
    margin-bottom: 8px;
}

.pro-upload-area .pro-upload-hint {
    font-size: 14px;
    color: #666;
}

.pro-canvas-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    background: #fafafa;
    border: 2px dashed #ddd;
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 450px;
}

.pro-canvas-container.pro-has-image {
    border-style: solid;
    border-color: #e0e0e0;
}

.protractor-canvas {
    display: block;
    cursor: crosshair;
    max-width: 100%;
}

.protractor-canvas.pro-adjust-mode {
    cursor: grab;
}

.protractor-canvas.pro-rotating {
    cursor: grabbing;
}

.protractor-canvas.pro-scaling {
    cursor: nesw-resize;
}

.protractor-canvas.pro-measuring {
    cursor: crosshair;
}

.pro-angle-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px 24px;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: 10px;
    margin: 20px auto;
    max-width: 320px;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.15);
}

.pro-angle-display .pro-angle-label {
    font-size: 15px;
    color: #555;
    font-weight: 500;
}

.pro-angle-display .pro-angle-value {
    font-size: 28px;
    font-weight: 700;
    color: #1976D2;
    font-family: 'Courier New', monospace;
    min-width: 100px;
    text-align: center;
}

.pro-upload-area {
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px dashed #ccc;
    border-radius: 12px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    margin: 20px auto;
    max-width: 500px;
}

.pro-upload-area:hover {
    border-color: #2196F3;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

.pro-upload-area .pro-upload-icon {
    font-size: 48px;
    color: #2196F3;
    margin-bottom: 12px;
}

.pro-upload-area .pro-upload-text {
    font-size: 16px;
    color: #666;
    margin-bottom: 8px;
}

.pro-upload-area .pro-upload-hint {
    font-size: 13px;
    color: #999;
}

.pro-control-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 16px auto;
    flex-wrap: wrap;
}

.pro-tip-box {
    padding: 10px 16px;
    background: #fff3e0;
    border-left: 4px solid #FF9800;
    border-radius: 0 8px 8px 0;
    margin: 12px auto;
    max-width: 500px;
    font-size: 13px;
    color: #666;
    display: none;
}

.pro-tip-box.pro-active {
    display: block;
}

.pro-measurement-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 16px auto;
    max-width: 500px;
}

.pro-info-item {
    background: #f5f5f5;
    padding: 10px 14px;
    border-radius: 8px;
    text-align: center;
}

.pro-info-item .pro-info-label {
    font-size: 12px;
    color: #888;
    margin-bottom: 4px;
}

.pro-info-item .pro-info-value {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.pro-scale-label {
    font-size: 11px;
    fill: #666;
    font-family: Arial, sans-serif;
}

/* ===== 量角器调整工具栏样式 START ===== */
.pro-adjust-toolbar {
    display: none;
    background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
    border: 2px solid #2196F3;
    border-radius: 10px;
    padding: 12px 16px;
    margin: 12px auto;
    max-width: 600px;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.2);
}

.pro-adjust-toolbar.pro-active {
    display: block;
}

.pro-toolbar-title {
    font-size: 14px;
    font-weight: 600;
    color: #2196F3;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.pro-toolbar-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.pro-toolbar-group {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: white;
    border-radius: 6px;
}

.pro-toolbar-label {
    font-size: 12px;
    color: #666;
    white-space: nowrap;
}

.pro-toolbar-btn {
    width: 36px;
    height: 36px;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 18px;
    color: #333;
}

.pro-toolbar-btn:hover {
    background: #2196F3;
    color: white;
    border-color: #2196F3;
}

.pro-toolbar-value {
    font-size: 13px;
    color: #333;
    min-width: 50px;
    text-align: center;
    font-family: 'Courier New', monospace;
}

.pro-mode-indicator {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.pro-mode-indicator.pro-measure-mode {
    background: #e8f5e9;
    color: #4CAF50;
}

.pro-mode-indicator.pro-adjust-mode {
    background: #fff3e0;
    color: #FF9800;
}
/* ===== 量角器调整工具栏样式 END ===== */

.canvas-container {
    display: none;
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    background: #fafafa;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    overflow: hidden;
    text-align: center;
    min-height: 400px;
}

.canvas-container .mjz {
    display: block;
    cursor: crosshair;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .upload-area {
        padding: 40px 20px;
        margin: 20px auto;
    }

    .canvas-container {
        margin: 10px auto;
    }

    .pro-angle-display {
        max-width: 280px;
        padding: 12px 16px;
    }

    .pro-angle-display .pro-angle-value {
        font-size: 24px;
    }

    .pro-measurement-info {
        grid-template-columns: repeat(2, 1fr);
    }

    .pro-toolbar-controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .upload-area {
        padding: 30px 15px;
        margin: 15px auto;
        min-height: 150px;
    }

    .upload-area .pro-upload-text {
        font-size: 16px;
    }

    .upload-area .pro-upload-hint {
        font-size: 12px;
    }

    .pro-angle-display .pro-angle-value {
        font-size: 20px;
        min-width: 80px;
    }

    .pro-measurement-info {
        grid-template-columns: 1fr;
    }
}