.mediaConverter_wrapper {
              width: 100%;
              margin: 0 auto;
              font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
              color: #333;
              line-height: 1.6;
            }
            
            .mediaConverter_wrapper .mediaConverter_tabs {
              display: flex;
              justify-content: center;
              margin-bottom: 1.5rem;
              border-bottom: 1px solid #eaeaea;
            }
            
            .mediaConverter_wrapper .mediaConverter_tab {
              background: none;
              border: none;
              border-bottom: 3px solid transparent;
              padding: 0.6rem 1.2rem;
              font-size: 0.95rem;
              cursor: pointer;
              display: flex;
              align-items: center;
              gap: 0.5rem;
              color: #666;
              transition: all 0.2s ease;
            }
            
            .mediaConverter_wrapper .mediaConverter_tab:hover {
              color: #3498db;
            }
            
            .mediaConverter_wrapper .mediaConverter_tab.active {
              color: #3498db;
              border-bottom: 3px solid #3498db;
              font-weight: 600;
            }
            
            .mediaConverter_wrapper .mediaConverter_card {
              display: flex;
              flex-direction: column;
              gap: 1rem;
              padding: 1.5rem;
              background: white;
              border-radius: 8px;
              box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            }
            
            .mediaConverter_wrapper .hidden {
              display: none;
            }
            
            .mediaConverter_wrapper .mediaConverter_uploadArea {
              border: 2px dashed #bdc3c7;
              border-radius: 8px;
              padding: 2rem 1rem;
              text-align: center;
              color: #7f8c8d;
              cursor: pointer;
              transition: all 0.3s ease;
              display: flex;
              flex-direction: column;
              align-items: center;
              gap: 0.8rem;
              background-color: #f8f9fa;
            }
            
            .mediaConverter_wrapper .mediaConverter_uploadArea:hover {
              border-color: #3498db;
              color: #3498db;
              background-color: #e8f4fc;
            }
            
            .mediaConverter_wrapper .mediaConverter_uploadArea svg {
              stroke: currentColor;
            }
            
            .mediaConverter_wrapper .mediaConverter_downloadBtn {
              display: inline-flex;
              justify-content: center;
              align-items: center;
              padding: 0.6rem 1.5rem;
              background-color: #27ae60;
              color: white;
              border-radius: 6px;
              text-decoration: none;
              font-size: 0.9rem;
              margin-top: 0.5rem;
              width: fit-content;
              margin-left: auto;
              margin-right: auto;
              transition: background-color 0.3s ease;
            }
            
            .mediaConverter_wrapper .mediaConverter_downloadBtn:hover {
              background-color: #219653;
            }
            
            .mediaConverter_wrapper .mediaConverter_preview {
              max-width: 100%;
              max-height: 320px;
              border-radius: 6px;
              display: block;
              margin: 0.5rem 0;
              object-fit: contain;
              border: 1px solid #eee;
              padding: 5px;
              background: #f8f8f8;
            }
            
            .mediaConverter_wrapper .mediaConverter_textArea {
              width: 100%;
              height: 140px;
              padding: 0.8rem;
              font-family: "Consolas", "Monaco", monospace;
              font-size: 0.85rem;
              border: 1px solid #ddd;
              border-radius: 6px;
              resize: vertical;
              line-height: 1.4;
              background-color: #fcfcfc;
            }
            
            .mediaConverter_wrapper .mediaConverter_primaryBtn {
              background-color: #3498db;
              color: white;
              border: none;
              padding: 0.7rem 1.5rem;
              border-radius: 6px;
              cursor: pointer;
              font-size: 0.95rem;
              font-weight: 500;
              transition: background-color 0.3s ease;
            }
            
            .mediaConverter_wrapper .mediaConverter_primaryBtn:hover {
              background-color: #2980b9;
            }
            
            .mediaConverter_wrapper .mediaConverter_secondaryBtn {
              background-color: #f0f0f0;
              color: #333;
              border: 1px solid #ccc;
              padding: 0.6rem 1.2rem;
              border-radius: 6px;
              cursor: pointer;
              font-size: 0.9rem;
              transition: background-color 0.3s ease;
            }
            
            .mediaConverter_wrapper .mediaConverter_secondaryBtn:hover {
              background-color: #e0e0e0;
            }
            
            /* Base64知识科普样式 */
            .mediaConverter_wrapper .mediaConverter_intro {
              background-color: #f8f9fa;
              padding: 1.2rem;
              border-radius: 8px;
              margin-top: 1.5rem;
              border-left: 4px solid #3498db;
              font-size: 0.95rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro h3 {
              margin-top: 0;
              margin-bottom: 0.8rem;
              color: #2c3e50;
              font-size: 1.1rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro p {
              margin-bottom: 0.8rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro ul {
              margin-left: 1.2rem;
              margin-bottom: 1rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro li {
              margin-bottom: 0.4rem;
              line-height: 1.5;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro code {
              background-color: #e8f4fc;
              padding: 0.2rem 0.4rem;
              border-radius: 3px;
              font-family: "Consolas", "Monaco", monospace;
              font-size: 0.85rem;
              color: #2c3e50;
            }
            
            .mediaConverter_wrapper .mediaConverter_intro strong {
              color: #2c3e50;
            }
            
            .mediaConverter_wrapper .mediaConverter_instructions {
              margin-top: 1.5rem;
              padding: 1.2rem;
              background-color: #f8f9fa;
              border-radius: 8px;
              font-size: 0.9rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_instructions h3 {
              margin-top: 0;
              margin-bottom: 0.8rem;
              color: #2c3e50;
              font-size: 1.1rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_instructions p {
              margin-bottom: 0.8rem;
            }
            
            .mediaConverter_wrapper .mediaConverter_footer {
              margin-top: 2.5rem;
              font-size: 0.85rem;
              color: #7f8c8d;
              text-align: center;
              border-top: 1px solid #eee;
              padding-top: 1rem;
            }