/* ===== 独享CSS - 404页面 ===== */
        .page-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 150px 0 80px;
            text-align: center;
            margin-top: 80px;
        }

        .page-header h1 {
            font-size: 3rem;
            margin-bottom: 20px;
        }

        .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
        }

        .error-section {
            background: white;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .error-content {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            padding: 40px 0;
        }

        .error-icon {
            font-size: 8rem;
            color: var(--primary-color);
            margin-bottom: 30px;
            animation: float 3s ease-in-out infinite;
        }

        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
            100% { transform: translateY(0px); }
        }

        .error-number {
            font-size: 6rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1;
            position: relative;
            display: inline-block;
        }

        .error-number::before, .error-number::after {
            content: '';
            position: absolute;
            width: 100px;
            height: 5px;
            background: var(--accent-color);
            top: 50%;
            transform: translateY(-50%);
        }

        .error-number::before {
            left: -120px;
        }

        .error-number::after {
            right: -120px;
        }

        .error-title {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }

        .error-message {
            font-size: 1.2rem;
            color: #666;
            margin-bottom: 40px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .error-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 40px;
        }

        .btn-light {
            background: white;
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
        }

        .btn-light:hover {
            background: var(--primary-color);
            color: white;
        }

        .quick-links {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid #eee;
        }

        .quick-links h3 {
            font-size: 1.5rem;
            margin-bottom: 30px;
            color: var(--primary-color);
        }

        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            max-width: 600px;
            margin: 0 auto;
        }

        .link-card {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            transition: var(--transition);
            text-align: center;
        }

        .link-card:hover {
            background: var(--primary-color);
            transform: translateY(-5px);
        }

        .link-card:hover a {
            color: white;
        }

        .link-card a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }

        .link-card i {
            display: block;
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        .search-box {
            max-width: 500px;
            margin: 40px auto 0;
            position: relative;
        }

        .search-box input {
            width: 100%;
            padding: 12px 20px;
            border: 1px solid #e0e0e0;
            border-radius: 30px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .search-box input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px rgba(26, 58, 95, 0.1);
        }

        .search-box button {
            position: absolute;
            right: 5px;
            top: 5px;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            width: 35px;
            height: 35px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .search-box button:hover {
            background: var(--secondary-color);
        }

        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 2.5rem;
            }
            
            .error-number {
                font-size: 4rem;
            }
            
            .error-number::before, .error-number::after {
                width: 50px;
            }
            
            .error-number::before {
                left: -60px;
            }
            
            .error-number::after {
                right: -60px;
            }
            
            .error-title {
                font-size: 2rem;
            }
            
            .error-icon {
                font-size: 6rem;
            }
            
            .links-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .error-number {
                font-size: 3rem;
            }
            
            .error-number::before, .error-number::after {
                width: 30px;
            }
            
            .error-number::before {
                left: -40px;
            }
            
            .error-number::after {
                right: -40px;
            }
            
            .error-title {
                font-size: 1.5rem;
            }
            
            .error-icon {
                font-size: 4rem;
            }
            
            .error-actions {
                flex-direction: column;
                align-items: center;
            }
        }