.merge-container{color:#333;max-width:800px;margin:30px auto;padding:10px;font-family:Segoe UI,sans-serif}.page-title{text-align:center;margin-bottom:20px;font-size:24px;font-weight:600}.box-1{border:1px solid red}.upload-card{text-align:center;background:#fff;border-radius:12px;margin-bottom:20px;padding:30px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.upload-text{margin-bottom:15px;font-size:16px}.upload-btn{color:#fff;cursor:pointer;background:#ff7b29;border-radius:8px;padding:10px 20px;font-weight:500;display:inline-block;position:relative}.upload-btn input{display:none}.files-card{background:#fff;border-radius:12px;margin-bottom:20px;padding:20px;box-shadow:0 4px 12px rgba(0,0,0,.08)}.section-title{margin-bottom:15px;font-size:18px;font-weight:600}.files-table{border-collapse:collapse;width:100%}.files-table th,.files-table td{text-align:left;border-bottom:1px solid #eee;padding:12px}.remove-btn{color:#fff;cursor:pointer;background:#ff4d4d;border:none;border-radius:6px;padding:5px 12px}.preview-card{background:#fff;border-radius:12px;margin-bottom:20px;padding:20px;box-shadow:0 4px 12px rgba(0,0,0,.08)}.preview-grid{flex-wrap:wrap;gap:15px;display:flex}.preview-box{text-align:center;background:#f5f5f5;border:2px dashed #ccc;border-radius:8px;justify-content:center;align-items:center;width:120px;height:150px;padding:8px;font-size:13px;display:flex}.action-card{text-align:center;margin-top:20px}.merge-btn{color:#fff;cursor:pointer;background:#ff7b29;border:none;border-radius:8px;margin-right:10px;padding:12px 24px;font-weight:600}.download-btn{color:#fff;cursor:pointer;background:#007bff;border:none;border-radius:8px;padding:12px 24px;font-weight:600}.merge-btn:hover{background:#e96a1c}.download-btn:hover{background:#0066d1}.pdf-merge.seo-content{background:#fff;border-radius:12px;max-width:900px;margin:50px auto;padding:24px;font-size:1rem;line-height:1.7;box-shadow:0 2px 12px rgba(0,0,0,.08)}.pdf-merge.seo-content h2{color:#222;margin-bottom:16px;font-size:1.8rem}.pdf-merge.seo-content h3{color:#333;margin:24px 0 12px;font-size:1.4rem}.pdf-merge.seo-content h4{color:#444;margin-bottom:8px;font-size:1.1rem}.pdf-merge.seo-content p{color:#555;margin-bottom:16px}.pdf-merge.seo-content ol{margin-bottom:16px;padding-left:20px}.pdf-merge.seo-content li{margin-bottom:8px}.pdf-merge.seo-content .features-list{margin:0 0 16px;padding:0;list-style:none}.pdf-merge.seo-content .features-list li{color:#333;margin-bottom:8px;font-weight:500}.pdf-merge.seo-content .faq-item{background:#f9fbff;border-left:4px solid #1890ff;border-radius:6px;margin-bottom:20px;padding:12px 16px}@media (max-width:768px){.pdf-merge.seo-content{padding:18px;font-size:.95rem}.pdf-merge.seo-content h2{font-size:1.5rem}.pdf-merge.seo-content h3{font-size:1.2rem}}@media (max-width:480px){.pdf-merge.seo-content{padding:14px;font-size:.9rem}.pdf-merge.seo-content h2{font-size:1.3rem}}.pdf-upload-box{text-align:center;cursor:pointer;background-color:#f0f8ff;border:2px dashed #1890ff;border-radius:12px;padding:40px 20px;transition:background-color .3s,border-color .3s}.pdf-upload-box:hover{background-color:#e6f7ff;border-color:#40a9ff}.pdf-upload-box.drag-over{background-color:#bae7ff;border-color:#1890ff}.upload-label{cursor:pointer;flex-direction:column;align-items:center;display:flex}.upload-icon{color:#1890ff;margin-bottom:16px;font-size:48px}.upload-text strong{color:#0c2e8a;margin-bottom:6px;font-size:18px;display:block}.upload-text span{color:#555;font-size:14px}@media (max-width:768px){.pdf-upload-box{padding:30px 15px}.upload-icon{font-size:40px}.upload-text strong{font-size:16px}.upload-text span{font-size:13px}}@media (max-width:480px){.pdf-upload-box{padding:25px 10px}.upload-icon{font-size:36px}.upload-text strong{font-size:15px}.upload-text span{font-size:12px}}.file-table-container{background:#fff;border-radius:12px;margin-top:24px;margin-bottom:24px;overflow-x:auto;box-shadow:0 6px 18px rgba(0,0,0,.08)}@media (max-width:768px){.file-table thead{display:none}.file-table tbody tr{border:1px solid #f0f0f0;border-radius:12px;margin-bottom:14px;padding:14px;display:block}.file-table tbody td{justify-content:space-between;padding:8px 0;display:flex}.file-table tbody td.file-name{flex:1}}.output-name-container{width:100%;max-width:500px;margin:0 auto}.output-name-container .output-name-input{box-sizing:border-box;border-radius:8px;width:100%;padding:10px 12px;font-size:1rem;transition:all .2s}.output-name-container .output-name-input:focus{border-color:#52c41a;box-shadow:0 0 5px rgba(82,196,26,.5)}.merge-btn{border-radius:8px;min-width:180px;padding:10px 20px;font-size:1rem;transition:all .2s}.merge-btn:hover:not(:disabled){background-color:#45a049;box-shadow:0 4px 8px rgba(0,0,0,.2)}.merge-btn:disabled{opacity:.6;cursor:not-allowed}.merge-btn-container{justify-content:center;width:100%;display:flex}@media (max-width:576px){.output-name-container .output-name-input{padding:8px 10px;font-size:.95rem}.merge-btn{min-width:150px;padding:8px 15px;font-size:.95rem}}.file-table-container{background:#fff;border-radius:12px;margin:24px 0;overflow-x:auto;box-shadow:0 6px 18px rgba(0,0,0,.08)}.file-table{border-collapse:separate;border-spacing:0;width:100%}.file-table thead tr{background:#e6f7ff}.file-table th,.file-table td{text-align:center;padding:14px 18px;font-size:.95rem}.file-table td.file-name{text-align:left;align-items:center;gap:10px;display:flex}.pdf-icon{color:#e03e2d;font-size:1.3rem}.actions{justify-content:center;gap:10px;display:flex}.action-btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;padding:8px 12px;font-size:1rem;transition:all .2s;display:flex}.action-btn.up{color:#1890ff;background-color:#e6f7ff}.action-btn.down{color:#fa8c16;background-color:#fff7e6}.action-btn.remove{color:#f5222d;background-color:#fff1f0}.action-btn:hover{transform:translateY(-2px);box-shadow:0 4px 10px rgba(0,0,0,.12)}.action-btn:disabled{color:#a0a0a0;cursor:not-allowed;opacity:.6;pointer-events:none;background-color:#e0e0e0}.action-btn:disabled i{color:#a0a0a0}@media (max-width:768px){.file-table thead{display:none}.file-table tbody tr{background:#fff;border:1px solid #f0f0f0;border-radius:12px;flex-direction:column;gap:10px;margin-bottom:16px;padding:12px 16px;display:flex;box-shadow:0 3px 8px rgba(0,0,0,.06)}.file-table tbody td{justify-content:space-between;align-items:center;padding:4px 0;display:flex}.file-table tbody td.file-name{flex:1;gap:12px}.actions{justify-content:flex-end;gap:6px}.action-btn{padding:6px 10px;font-size:.9rem}}.desktop-view{display:block}.mobile-view{display:none}@media (max-width:768px){.desktop-view{display:none}.mobile-view{display:block}.file-card{background:#fff;border:1px solid #f0f0f0;border-radius:12px;margin-bottom:16px;padding:12px 16px;box-shadow:0 2px 6px rgba(0,0,0,.05)}.file-top-row{justify-content:space-between;align-items:center;display:flex}.file-name{flex:1;align-items:center;gap:10px;font-weight:500;display:flex;overflow:hidden}.file-name span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.actions{flex-shrink:0;gap:6px;display:flex}.file-details{color:#555;gap:16px;margin-top:4px;font-size:.85rem;display:flex}}.alert-box{color:#c00;background-color:#fff4f4;border:1px solid #f5c2c2;border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:16px;padding:12px 16px;font-weight:500;display:flex}.alert-box .close-btn{cursor:pointer;color:#c00;background:0 0;border:none;font-size:18px}