.tool-header{text-align:center;margin-bottom:40px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #667eea, #764ba2);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #667eea);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}.tool-header p{color:var(--gray-500);font-size:1rem}.watermark-tabs{display:flex;gap:16px;margin-bottom:32px;justify-content:center}.watermark-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:160px}.watermark-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.watermark-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.watermark-tab small{font-size:0.65rem;color:var(--gray-400)}.watermark-tab.active{background:linear-gradient(135deg, #667eea, #764ba2);box-shadow:0 8px 25px rgba(102,126,234,0.3)}.watermark-tab.active i,.watermark-tab.active span,.watermark-tab.active small{color:white}.watermark-container{display:grid;grid-template-columns:360px 1fr;gap:24px;margin-bottom:24px}.control-panel{background:linear-gradient(135deg, #f8fafc, #fff);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.upload-area{border:2px dashed var(--gray-300);border-radius:20px;padding:30px 20px;text-align:center;cursor:pointer;transition:all 0.3s;margin-bottom:20px}.upload-area:hover{border-color:#667eea;background:var(--gray-50)}.upload-area i{font-size:48px;color:var(--gray-400);margin-bottom:12px}.upload-hint{font-size:0.7rem;color:var(--gray-400);display:block;margin-top:8px}.video-info{background:var(--gray-50);border-radius:16px;padding:12px 16px;margin-bottom:20px}.info-row{display:flex;align-items:center;gap:10px;font-size:0.8rem;color:var(--gray-600);padding:6px 0;border-bottom:1px solid var(--gray-200)}.info-row:last-child{border-bottom:none}.info-row i{width:24px;color:#667eea}.settings-group{margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--gray-200)}.settings-group:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.settings-group h4{font-size:0.85rem;margin-bottom:16px;color:var(--gray-700);display:flex;align-items:center;gap:8px}.setting-row{margin-bottom:14px}.setting-row label{display:block;font-size:0.75rem;color:var(--gray-500);margin-bottom:6px}.setting-row input[type="range"]{width:calc(40%);vertical-align:middle}.setting-row input[type="range"]+span{display:inline-block;width:50px;text-align:right;font-size:0.75rem;color:#667eea}.setting-row input[type="number"]{width:80px;padding:6px 10px;border:1px solid var(--gray-300);border-radius:10px}.position-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:8px;margin-bottom:16px}.pos-btn{background:white;border:1px solid var(--gray-200);padding:8px;border-radius:12px;cursor:pointer;font-size:0.7rem;transition:all 0.2s}.pos-btn:hover{border-color:#667eea;background:var(--gray-50)}.pos-btn.active{background:linear-gradient(135deg, #667eea, #764ba2);color:white;border-color:transparent}.upload-area-sm{border:1px dashed var(--gray-300);border-radius:16px;padding:20px;text-align:center;cursor:pointer;margin-bottom:16px}.upload-area-sm i{font-size:32px;color:var(--gray-400);margin-bottom:8px}.image-preview{position:relative;text-align:center;margin-bottom:16px}.image-preview img{max-width:100px;max-height:100px;border-radius:12px;border:1px solid var(--gray-200)}.image-preview button{position:absolute;top:-8px;right:-8px;background:#ef4444;color:white;border:none;width:24px;height:24px;border-radius:50%;cursor:pointer}.process-btn{width:100%;padding:14px;font-size:1rem;margin-top:16px;background:linear-gradient(135deg, #667eea, #764ba2)}.preview-panel{background:#1a1a2e;border-radius:24px;overflow:hidden}.preview-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:#2d2d44;color:white}.preview-tip{font-size:0.7rem;color:#a0a0c0}.video-preview-container{position:relative;min-height:300px;display:flex;align-items:center;justify-content:center;background:#0f0f1a}.preview-placeholder{text-align:center;color:var(--gray-500)}.preview-placeholder i{font-size:48px;margin-bottom:16px}.preview-canvas{width:100%;max-height:400px;object-fit:contain}.preview-video{width:100%;max-height:400px}.preview-info{display:flex;align-items:center;gap:12px;padding:12px 20px;background:#2d2d44}#previewSeek{flex:1;height:4px;-webkit-appearance:none;background:#4a4a6a;border-radius:2px}#previewSeek::-webkit-slider-thumb{-webkit-appearance:none;width:12px;height:12px;background:#667eea;border-radius:50%;cursor:pointer}.preview-btn{background:transparent;border:none;color:white;cursor:pointer;font-size:1rem}.result-area{margin-top:24px;background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200)}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.result-header span{font-weight:600;color:#10b981}.result-actions{display:flex;gap:12px}.result-video{padding:20px;text-align:center}.result-video video{max-width:100%;border-radius:16px}.progress-area{margin-top:20px;padding:16px;background:var(--gray-50);border-radius:16px}.progress-bar{height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg, #667eea, #764ba2);width:0%;transition:width 0.3s}.progress-text{text-align:center;margin-top:8px;font-size:0.75rem;color:var(--gray-500)}.info-footer{margin-top:32px;background:var(--gray-50);border-radius:24px;padding:24px}.info-footer-header{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-weight:600;color:var(--gray-700)}.info-footer-steps{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.step-item{display:flex;gap:14px;align-items:flex-start}.step-number{width:36px;height:36px;background:linear-gradient(135deg, #667eea, #764ba2);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h4{font-size:0.9rem;margin-bottom:4px}.step-content p{font-size:0.75rem;color:var(--gray-500)}.info-note{margin-top:20px;padding:12px 16px;background:#fef3c7;border-radius:16px;font-size:0.75rem;color:#92400e}.ad-section{margin:20px 0 40px}.ad-banner{background:linear-gradient(135deg, #f5f5f5, #fff);border:1px solid var(--gray-200);border-radius:16px;padding:20px;text-align:center;position:relative}.ad-label{position:absolute;top:8px;right:12px;font-size:0.6rem;color:var(--gray-400)}@media (max-width:900px){.watermark-container{grid-template-columns:1fr}.info-footer-steps{grid-template-columns:repeat(2, 1fr)}}@media (max-width:480px){.watermark-tab{padding:10px 16px;min-width:auto}.position-grid{grid-template-columns:repeat(3, 1fr)}.info-footer-steps{grid-template-columns:1fr}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}