/* 独享CSS - 404页面 */
        
        /* 页面标题区域 */
        .page-header {
            background: linear-gradient(135deg, var(--primary-color), #152642);
            color: white;
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        
        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--secondary-color), #ffd700);
        }
        
        .page-header h1 {
            font-size: 42px;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .page-header h1::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary-color), #ffd700);
            box-shadow: 0 0 8px var(--secondary-color);
        }
        
        .page-header p {
            font-size: 18px;
            max-width: 700px;
            margin: 0 auto;
            color: rgba(255,255,255,0.8);
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            background: rgba(255,255,255,0.1);
            padding: 15px 0;
            margin-bottom: 40px;
        }
        
        .breadcrumb .container {
            display: flex;
            align-items: center;
        }
        
        .breadcrumb a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        
        .breadcrumb span {
            margin: 0 10px;
            color: rgba(255,255,255,0.5);
        }
        
        .breadcrumb .current {
            color: var(--secondary-color);
        }
        
        /* 404内容区域 */
        .error-content {
            padding: 100px 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 60vh;
        }
        
        .error-container {
            text-align: center;
            max-width: 700px;
            width: 100%;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .error-card {
            background: white;
            border-radius: 12px;
            padding: 60px 40px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            position: relative;
            overflow: hidden;
        }
        
        .error-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--secondary-color), #ffd700);
        }
        
        .error-icon {
            width: 120px;
            height: 120px;
            background: linear-gradient(135deg, rgba(212, 175, 55, 0.1), rgba(255, 215, 0, 0.1));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 30px;
            color: var(--secondary-color);
            font-size: 50px;
            animation: iconFloat 3s infinite ease-in-out;
        }
        
        @keyframes iconFloat {
            0% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
            100% {
                transform: translateY(0);
            }
        }
        
        .error-number {
            font-size: 120px;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1;
            text-shadow: 0 5px 15px rgba(0,0,0,0.1);
            animation: numberPulse 2s infinite;
        }
        
        @keyframes numberPulse {
            0% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1);
            }
        }
        
        .error-title {
            font-size: 32px;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .error-description {
            color: #718096;
            font-size: 18px;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        
        .error-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 14px 30px;
            background: linear-gradient(135deg, var(--secondary-color), #ffd700);
            color: var(--primary-color);
            text-decoration: none;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(212, 175, 55, 0.3);
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(212, 175, 55, 0.5);
        }
        
        .btn-outline {
            background: transparent;
            border: 2px solid var(--secondary-color);
            color: var(--secondary-color);
        }
        
        .btn-outline:hover {
            background: var(--secondary-color);
            color: var(--primary-color);
        }
        
        .btn i {
            margin-right: 8px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 32px;
            }
            
            .error-number {
                font-size: 80px;
            }
            
            .error-title {
                font-size: 24px;
            }
            
            .error-description {
                font-size: 16px;
            }
            
            .error-card {
                padding: 40px 20px;
            }
            
            .error-actions {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
        }
        
        @media (max-width: 576px) {
            .error-number {
                font-size: 60px;
            }
            
            .error-icon {
                width: 80px;
                height: 80px;
                font-size: 35px;
            }
        }