.tools-nav{display:grid;grid-template-columns:repeat(6, 1fr);gap:12px;margin-bottom:32px}.nav-card{background:white;border-radius:16px;padding:16px 8px;text-align:center;cursor:pointer;transition:all 0.3s;border:1px solid var(--gray-200)}.nav-card i{font-size:1.5rem;color:var(--gray-400);margin-bottom:8px;display:block}.nav-card span{display:block;font-weight:600;font-size:0.8rem;margin-bottom:4px}.nav-card small{font-size:0.6rem;color:var(--gray-400)}.nav-card.active{background:linear-gradient(135deg, #dc2626, #991b1b);color:white;transform:translateY(-2px);box-shadow:0 8px 20px -8px rgba(220,38,38,0.3)}.nav-card.active i,.nav-card.active span,.nav-card.active small{color:white}.tool-card{background:white;border-radius:24px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,0.05);border:1px solid var(--gray-100)}.tool-header-inner{margin-bottom:24px}.tool-header-inner h3{font-size:1.2rem;margin-bottom:6px;display:flex;align-items:center;gap:8px}.tool-header-inner p{color:var(--gray-500);font-size:0.85rem}.upload-area{border:2px dashed var(--gray-300);border-radius:20px;padding:40px;text-align:center;cursor:pointer;transition:all 0.3s;background:var(--gray-50)}.upload-area:hover{border-color:#dc2626;background:#fef2f2}.upload-area i{font-size:40px;color:var(--gray-400);margin-bottom:12px}.upload-area p{font-weight:500;margin-bottom:6px}.upload-area span{font-size:0.7rem;color:var(--gray-400);display:block;margin-bottom:16px}.upload-btn{background:var(--gray-200);border:none;padding:8px 20px;border-radius:30px;cursor:pointer;font-size:0.85rem;transition:all 0.2s}.upload-btn:hover{background:#dc2626;color:white}.file-list{margin-top:20px;max-height:300px;overflow-y:auto}.file-item{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--gray-50);border-radius:14px;margin-bottom:8px}.file-info{margin-top:16px}.file-detail{display:flex;align-items:center;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--gray-200);margin-bottom:16px;flex-wrap:wrap}.file-detail i{font-size:1.3rem;color:#dc2626}.split-options,.compress-options,.convert-options,.encrypt-options,.decrypt-options,.rotate-options,.watermark-options,.delete-options{margin-top:16px}.quality-buttons,.format-buttons,.rotate-buttons,.type-buttons{display:flex;gap:12px;margin:12px 0;flex-wrap:wrap}.quality-btn,.format-btn,.rotate-btn,.type-btn{background:var(--gray-100);border:1px solid var(--gray-200);padding:6px 16px;border-radius:30px;cursor:pointer;font-size:0.8rem;transition:all 0.2s}.quality-btn.active,.format-btn.active,.rotate-btn.active,.type-btn.active{background:#dc2626;color:white;border-color:#dc2626}.password-strength{margin-top:6px;height:4px;background:var(--gray-200);border-radius:4px;overflow:hidden}.strength-bar{height:100%;width:0%;transition:width 0.3s}.strength-bar.weak{background:#ef4444;width:33%}.strength-bar.medium{background:#f59e0b;width:66%}.strength-bar.strong{background:#10b981;width:100%}.permissions-group{margin-top:16px;padding:16px;background:var(--gray-50);border-radius:16px}.checkbox-group{display:flex;flex-wrap:wrap;gap:20px;margin-top:8px}.checkbox-label{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:0.8rem}.range-input{margin-top:12px}.range-input input{width:100%;margin-bottom:6px}.range-input small{font-size:0.7rem;color:var(--gray-400)}.tool-actions{display:flex;justify-content:center;gap:16px;margin-top:24px}.extract-result{margin-top:24px;background:var(--gray-50);border-radius:20px;overflow:hidden}.result-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:white;border-bottom:1px solid var(--gray-200)}.extract-content{padding:20px;max-height:400px;overflow-y:auto;font-family:monospace;font-size:0.85rem;line-height:1.6;white-space:pre-wrap}.pdf2img-result{margin-top:24px;max-height:400px;overflow-y:auto;text-align:center}.pdf2img-item{display:inline-block;margin:8px;text-align:center}.pdf2img-item img{width:150px;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.pdf2img-item button{margin-top:8px;background:var(--gray-100);border:none;padding:4px 12px;border-radius:20px;font-size:0.7rem;cursor:pointer}.metadata-info{margin-top:20px}.info-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:16px;margin-bottom:24px;padding:16px;background:var(--gray-50);border-radius:16px}.info-item{display:flex;justify-content:space-between;align-items:center}.info-item span{color:var(--gray-500);font-size:0.85rem}.metadata-section{margin-top:20px;padding:16px;background:var(--gray-50);border-radius:16px}.metadata-section h4{font-size:0.9rem;margin-bottom:12px}.page-list{display:flex;flex-wrap:wrap;gap:8px}.page-tag{background:white;padding:4px 12px;border-radius:20px;font-size:0.75rem;border:1px solid var(--gray-200)}.upload-area-small{border:1px dashed var(--gray-300);border-radius:12px;padding:16px;text-align:center;cursor:pointer;background:var(--gray-50);margin:12px 0}.upload-btn-small{background:var(--gray-200);border:none;padding:4px 12px;border-radius:20px;font-size:0.75rem;cursor:pointer}#watermarkImagePreview{text-align:center;margin:12px 0}.result-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:white;border-radius:24px;max-width:500px;width:90%;overflow:hidden;animation:slideUp 0.3s ease}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, #10b981, #059669);color:white}.modal-header .close-modal{background:transparent;border:none;color:white;font-size:1.3rem;cursor:pointer}.modal-body{padding:24px;text-align:center}.modal-footer{display:flex;justify-content:center;gap:16px;padding:16px 20px;border-top:1px solid var(--gray-200)}.info-section{margin-top:32px;background:linear-gradient(135deg, #f8fafc, #fff);border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);box-shadow:0 4px 15px rgba(0,0,0,0.03)}.divider{display:flex;align-items:center;gap:12px;padding:16px 24px;background:linear-gradient(135deg, #f1f5f9, #fff);border-bottom:1px solid var(--gray-200)}.divider span{display:flex;align-items:center;gap:8px;font-weight:600;font-size:1rem;color:var(--gray-700)}.divider span i{color:#dc2626;font-size:1.1rem}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:24px}.info-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--gray-50);border-radius:16px;transition:all 0.3s;border:1px solid transparent}.info-item:hover{background:white;border-color:var(--gray-200);transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.05)}.info-item i{width:36px;height:36px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#dc2626}.info-item span{font-size:0.85rem;color:var(--gray-600);line-height:1.4}.info-steps{padding:0 24px 24px 24px}.steps-title{display:flex;align-items:center;gap:8px;margin-bottom:20px;font-weight:600;color:var(--gray-700)}.steps-title i{color:#dc2626}.steps-container{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.step-card{background:white;border-radius:20px;padding:20px;text-align:center;border:1px solid var(--gray-200);transition:all 0.3s;position:relative;overflow:hidden}.step-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg, #dc2626, #ef4444);transform:scaleX(0);transition:transform 0.3s}.step-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px -8px rgba(0,0,0,0.1)}.step-card:hover::before{transform:scaleX(1)}.step-number{width:44px;height:44px;background:linear-gradient(135deg, #dc2626, #ef4444);color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;margin:0 auto 16px;box-shadow:0 4px 10px rgba(220,38,38,0.3)}.step-card h4{font-size:1rem;margin-bottom:8px;color:var(--gray-800)}.step-card p{font-size:0.75rem;color:var(--gray-500);line-height:1.5}.info-tips{padding:0 24px 24px 24px}.tip-card{background:linear-gradient(135deg, #fef3c7, #fffbeb);border-radius:20px;padding:20px;border-left:4px solid #f59e0b}.tip-card h4{display:flex;align-items:center;gap:8px;font-size:0.9rem;margin-bottom:12px;color:#92400e}.tip-card p{font-size:0.8rem;color:#78350f;line-height:1.6}.tip-card ul{margin-top:12px;margin-left:20px}.tip-card li{font-size:0.75rem;color:#78350f;margin-bottom:6px}.info-faq{padding:0 24px 24px 24px}.faq-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:16px}.faq-item{background:var(--gray-50);border-radius:16px;padding:16px;transition:all 0.3s;cursor:pointer}.faq-item:hover{background:white;box-shadow:0 4px 12px rgba(0,0,0,0.05)}.faq-question{display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--gray-700)}.faq-question i{color:#dc2626;transition:transform 0.3s}.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease;font-size:0.8rem;color:var(--gray-500);margin-top:0}.faq-item.active .faq-answer{max-height:200px;margin-top:12px}.faq-item.active .faq-question i{transform:rotate(180deg)}@media (max-width:1024px){.info-grid{grid-template-columns:repeat(2, 1fr)}.steps-container{grid-template-columns:repeat(2, 1fr)}.faq-grid{grid-template-columns:1fr}}@media (max-width:768px){.info-grid{grid-template-columns:1fr}.steps-container{grid-template-columns:1fr}.divider{padding:12px 16px}.info-item{padding:10px 14px}}@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@media (max-width:1024px){.tools-nav{grid-template-columns:repeat(4, 1fr)}}@media (max-width:768px){.tools-nav{grid-template-columns:repeat(2, 1fr)}.tool-card{padding:16px}.upload-area{padding:30px 20px}.info-grid{grid-template-columns:1fr}.checkbox-group{flex-direction:column;gap:8px}}