/* 404页面主体样式 */
        .not-found-container {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 100px 20px;
            background: linear-gradient(135deg, #f9fbfd, #fff);
            position: relative;
            overflow: hidden;
        }
        
        .not-found-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(26, 60, 110, 0.03)"/></svg>');
            background-size: cover;
        }
        
        .not-found-content {
            text-align: center;
            max-width: 700px;
            width: 100%;
            padding: 60px 40px;
            background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.7));
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            backdrop-filter: blur(10px);
            position: relative;
            z-index: 1;
            transform: translateY(30px);
            opacity: 0;
            transition: all 0.8s ease;
            border: 1px solid rgba(255,255,255,0.3);
        }
        
        .not-found-content.animate {
            transform: translateY(0);
            opacity: 1;
        }
        
        .error-code {
            font-size: 150px;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), #ff6b6b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: float 3s ease-in-out infinite;
        }
        
        .error-code::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(248, 181, 0, 0.1) 0%, rgba(248, 181, 0, 0) 70%);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            z-index: -1;
        }
        
        .error-title {
            font-size: 36px;
            color: var(--dark-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: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        
        .error-description {
            font-size: 18px;
            color: var(--text-light);
            margin-bottom: 40px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }
        
        .btn {
            display: inline-block;
            padding: 15px 35px;
            background: linear-gradient(135deg, var(--secondary-color), #ffa500);
            color: white;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(248, 181, 0, 0.4);
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(248, 181, 0, 0.6);
        }
        
        .btn::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: rgba(255,255,255,0.2);
            transform: rotate(45deg);
            transition: var(--transition);
        }
        
        .btn:hover::after {
            left: 100%;
        }
        
        .error-illustration {
            margin-bottom: 40px;
            position: relative;
        }
        
        .error-illustration i {
            font-size: 120px;
            color: var(--primary-color);
            opacity: 0.7;
            animation: float 5s ease-in-out infinite;
        }
        
        /* 404页面响应式设计 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 120px;
            }
            
            .error-title {
                font-size: 30px;
            }
            
            .error-description {
                font-size: 16px;
            }
        }
        
        @media (max-width: 576px) {
            .error-code {
                font-size: 100px;
            margin-bottom: 15px;
            animation: float 4s ease-in-out infinite;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
            
            .error-title {
                font-size: 26px;
            }
            
            .error-description {
                font-size: 15px;
            }
            
            .error-illustration i {
                font-size: 80px;
            }
            
            .not-found-content {
                padding: 40px 20px;
            }
        }