.error-404{text-align:center;max-width:800px;margin:0 auto;padding:2rem 1rem}.error-404 .page-title{margin-bottom:2rem;color:#c00000;font-size:2.5rem}.error-404 h2{margin-bottom:1.5rem;font-size:1.8rem}.error-404 p{margin-bottom:2rem;font-size:1.2rem}.custom-search-form{margin:3rem auto;max-width:500px;position:relative}.custom-search-form .search-form{display:flex}.custom-search-form .search-field{flex-grow:1;padding:12px 15px;font-size:16px;border:1px solid #ddd;border-right:none;border-radius:4px 0 0 4px}.custom-search-form .search-submit{padding:0 20px;background-color:#007bff;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;display:flex;align-items:center;justify-content:center}.custom-search-form .search-submit:hover{background-color:#0069d9}.search-tips{margin-top:2rem;text-align:left;background-color:#f8f9fa;padding:1.5rem;border-radius:4px}.search-tips h3{margin-bottom:1rem;font-size:1.2rem;font-weight:600}.search-tips ul{list-style-type:disc;padding-left:1.5rem}.search-tips li{margin-bottom:.5rem;line-height:1.5}@media (max-width:768px){.error-404 .page-title{font-size:2rem}.error-404 h2{font-size:1.5rem}.custom-search-form{max-width:100%}}