/* ====== 404页面独享CSS ====== */
        
        /* 404内容区域 */
        .error-content {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: calc(100vh - 80px);
            margin-top: 80px;
            background: var(--light-color);
        }
        
        .error-container {
            text-align: center;
            max-width: 600px;
            padding: 50px;
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0,0,0,0.1);
            position: relative;
            overflow: hidden;
            animation: fadeInUp 1s ease;
        }
        
        @keyframes fadeInUp {
            0% { transform: translateY(30px); opacity: 0; }
            100% { transform: translateY(0); opacity: 1; }
        }
        
        .error-container:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--secondary-color));
            animation: gradientShift 3s infinite alternate;
        }
        
        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            100% { background-position: 100% 50%; }
        }
        
        .error-number {
            font-size: 8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 20px;
            line-height: 1;
            animation: numberPulse 2s infinite;
        }
        
        @keyframes numberPulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        
        .error-title {
            font-size: 2rem;
            color: var(--dark-color);
            margin-bottom: 20px;
        }
        
        .error-description {
            font-size: 1.1rem;
            color: #666;
            margin-bottom: 30px;
            line-height: 1.6;
        }
        
        .error-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 30px;
        }
        
        .btn-secondary {
            display: inline-block;
            padding: 12px 30px;
            background: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            border-radius: 50px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
        }
        
        .btn-secondary:hover {
            background: var(--primary-color);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(26, 115, 232, 0.3);
        }
        
        .error-icon {
            font-size: 4rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
            animation: iconFloat 3s infinite ease-in-out;
        }
        
        @keyframes iconFloat {
            0% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
            100% { transform: translateY(0); }
        }
        
        /* 动态背景元素 */
        .bg-elements {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }
        
        .bg-element {
            position: absolute;
            border-radius: 50%;
            background: rgba(26, 115, 232, 0.05);
            animation: floatElement 20s infinite linear;
        }
        
        @keyframes floatElement {
            0% { transform: translateY(0) rotate(0deg); }
            100% { transform: translateY(-1000px) rotate(720deg); }
        }