/* 独享CSS部分 - 404页面内容 */
        .page-header {
            padding: 150px 0 80px;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
            color: var(--light-color);
            text-align: center;
        }
        
        .page-title {
            font-size: 3rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
            transform: translateY(50px);
            opacity: 0;
            transition: transform 1s ease, opacity 1s ease;
        }
        
        .page-title.animate {
            transform: translateY(0);
            opacity: 1;
        }
        
        .page-subtitle {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            color: rgba(255, 255, 255, 0.8);
            transform: translateY(30px);
            opacity: 0;
            transition: transform 1s ease 0.3s, opacity 1s ease 0.3s;
        }
        
        .page-subtitle.animate {
            transform: translateY(0);
            opacity: 1;
        }
        
        .error-section {
            padding: 100px 0;
            background-color: var(--light-color);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 60vh;
        }
        
        .error-container {
            text-align: center;
            max-width: 800px;
            width: 100%;
            margin: 0 auto;
            transform: translateY(50px);
            opacity: 0;
            transition: transform 1s ease, opacity 1s ease;
        }
        
        .error-container.animate {
            transform: translateY(0);
            opacity: 1;
        }
        
        .error-content {
            background-color: white;
            border-radius: 20px;
            padding: 60px 40px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .error-content::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
        }
        
        .error-number {
            font-size: 10rem;
            font-weight: 900;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1;
            text-shadow: 5px 5px 0 rgba(0, 0, 0, 0.05);
            position: relative;
            display: inline-block;
            animation: numberFloat 4s infinite ease-in-out;
        }
        
        @keyframes numberFloat {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }
        
        .error-number::after {
            content: '';
            position: absolute;
            bottom: 10px;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 10px;
            background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
            border-radius: 50%;
            opacity: 0.3;
            animation: linePulse 3s infinite ease-in-out;
        }
        
        @keyframes linePulse {
            0%, 100% { width: 200px; opacity: 0.3; }
            50% { width: 300px; opacity: 0.6; }
        }
        
        .error-title {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }
        
        .error-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        
        .error-description {
            font-size: 1.2rem;
            color: #555;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }
        
        .error-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 40px;
        }
        
        .error-btn {
            display: inline-flex;
            align-items: center;
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        .error-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
            transition: var(--transition);
        }
        
        .error-btn:hover::before {
            left: 100%;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: var(--light-color);
        }
        
        .btn-primary:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .btn-secondary {
            background-color: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }
        
        .btn-secondary:hover {
            background-color: var(--primary-color);
            color: var(--light-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .error-btn i {
            margin-right: 8px;
            font-size: 1.1rem;
        }
        
        .error-search {
            max-width: 500px;
            margin: 40px auto 0;
            position: relative;
        }
        
        .search-input {
            width: 100%;
            padding: 15px 20px;
            border: 2px solid #e0e0e0;
            border-radius: 50px;
            font-size: 1rem;
            transition: var(--transition);
            padding-right: 50px;
        }
        
        .search-input:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(197, 160, 71, 0.2);
        }
        
        .search-btn {
            position: absolute;
            right: 5px;
            top: 5px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .search-btn:hover {
            background-color: var(--secondary-color);
            transform: rotate(15deg);
        }
        
        .error-decoration {
            position: absolute;
            font-size: 8rem;
            color: rgba(26, 54, 93, 0.03);
            z-index: 0;
            pointer-events: none;
            animation: decorationRotate 20s infinite linear;
        }
        
        @keyframes decorationRotate {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .decoration-1 {
            top: 20px;
            left: 20px;
        }
        
        .decoration-2 {
            bottom: 20px;
            right: 20px;
        }
        
        .quick-links {
            margin-top: 50px;
        }
        
        .quick-links h3 {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            text-align: center;
        }
        
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
            max-width: 600px;
            margin: 0 auto;
        }
        
        .link-item {
            background-color: rgba(26, 54, 93, 0.05);
            padding: 12px 15px;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
        }
        
        .link-item:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .error-number {
                font-size: 8rem;
            }
            
            .error-title {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                background-color: var(--primary-color);
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                transition: var(--transition);
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            .page-title {
                font-size: 2.5rem;
            }
            
            .error-number {
                font-size: 6rem;
            }
            
            .error-title {
                font-size: 1.8rem;
            }
            
            .error-description {
                font-size: 1.1rem;
            }
            
            .error-content {
                padding: 40px 25px;
            }
            
            .error-actions {
                flex-direction: column;
                align-items: center;
            }
            
            .error-btn {
                width: 100%;
                max-width: 250px;
                justify-content: center;
            }
            
            .decoration-1, .decoration-2 {
                font-size: 5rem;
            }
        }
        
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .friend-links-container {
                flex-direction: column;
                gap: 10px;
            }
            
            .error-number {
                font-size: 5rem;
            }
            
            .error-title {
                font-size: 1.5rem;
            }
            
            .error-description {
                font-size: 1rem;
            }
            
            .links-grid {
                grid-template-columns: 1fr;
            }
        }