.convert-wrapper{max-width:520px;margin:0 auto;background:#fff;border-radius:12px;box-shadow:0 2px 12px #00000014;padding:32px}.page-title{font-size:24px;color:#333;text-align:center;margin-bottom:28px}.form-group{margin-bottom:20px}label{display:block;font-size:14px;color:#606266;margin-bottom:8px;font-weight:500}input[type=file]{width:100%;padding:8px;border:1px solid #dcdfe6;border-radius:6px;font-size:14px}select{width:100%;padding:9px 12px;border:1px solid #dcdfe6;border-radius:6px;font-size:14px;background:#fff;cursor:pointer}input[type=range]{width:100%;cursor:pointer}.quality-value{text-align:right;font-size:13px;color:#909399;margin-top:4px}.convert-btn{width:100%;padding:12px;background:#409eff;color:#fff;border:none;border-radius:6px;font-size:16px;cursor:pointer;transition:background .2s}.convert-btn:hover:not(:disabled){background:#66b1ff}.convert-btn:disabled{background:#a0cfff;cursor:not-allowed}.error-box{margin-top:16px;padding:12px;background:#fef0f0;color:#f56c6c;border-radius:6px;font-size:14px}.result-box{margin-top:24px}.result-img{width:100%;border-radius:6px;margin-bottom:12px;border:1px solid #ebeef5;max-height:360px;object-fit:contain;background:#fafafa}.download-btn{display:block;width:100%;text-align:center;padding:10px;background:#67c23a;color:#fff;border:none;border-radius:6px;font-size:15px;cursor:pointer;transition:background .2s}.download-btn:hover{background:#85ce61}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f7fa;color:#333;line-height:1.6}.app{max-width:1000px;margin:0 auto;padding:30px 20px}.header{text-align:center;margin-bottom:30px}.header h1{font-size:28px;color:#1a1a1a;margin-bottom:8px}.header p{color:#666;font-size:14px}.compressor{background:#fff;border-radius:12px;padding:30px;box-shadow:0 2px 12px #0000000f}.upload-area{border:2px dashed #d0d7de;border-radius:8px;padding:50px 20px;text-align:center;cursor:pointer;transition:all .3s;background:#fafbfc}.upload-area:hover{border-color:#2f81f7;background:#f0f6ff}.upload-icon{font-size:40px;margin-bottom:12px}.upload-text{font-size:16px;font-weight:500;margin-bottom:4px}.upload-tip{font-size:12px;color:#8b949e}.control-panel{margin-top:24px;padding:20px;background:#f6f8fa;border-radius:8px}.mode-group{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}.mode-btn{flex:1;min-width:100px;padding:10px 12px;text-align:center;border:1px solid #d0d7de;border-radius:6px;cursor:pointer;font-size:14px;background:#fff;transition:all .2s}.mode-btn input{display:none}.mode-btn.active{border-color:#2f81f7;background:#eaf3ff;color:#2f81f7;font-weight:500}.quality-slider{display:flex;align-items:center;gap:12px;margin-bottom:16px;font-size:14px}.quality-slider input[type=range]{flex:1;accent-color:#2f81f7}.compress-btn{width:100%;padding:12px;background:#2f81f7;color:#fff;border:none;border-radius:6px;font-size:15px;cursor:pointer;transition:background .2s}.compress-btn:hover:not(:disabled){background:#1b6bdb}.compress-btn:disabled{background:#94bfff;cursor:not-allowed}.preview-wrap{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.preview-card{text-align:center}.preview-card h4{margin-bottom:12px;color:#57606a;font-size:14px;font-weight:500}.img-box{width:100%;height:280px;display:flex;align-items:center;justify-content:center;background:#f6f8fa;border-radius:6px;overflow:hidden;margin-bottom:10px}.img-box img{max-width:100%;max-height:100%;object-fit:contain}.size-text{font-size:14px;color:#57606a}.ratio-text{font-size:14px;color:#1a7f37;font-weight:500;margin:4px 0 12px}.download-btn{padding:8px 20px;background:#1a7f37;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:14px;transition:background .2s}.download-btn:hover{background:#156b2e}.footer{text-align:center;margin-top:30px;font-size:12px;color:#8b949e}@media(max-width:640px){.preview-wrap{grid-template-columns:1fr}.mode-group{flex-direction:column}}