/* 404页面专用样式 */
        .error-404 {
            min-height: calc(100vh - 200px);
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
            position: relative;
            overflow: hidden;
            padding-top: 20px;
        }

        .error-404::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: repeating-linear-gradient(
                45deg,
                transparent,
                transparent 10px,
                rgba(0,104,181,0.03) 10px,
                rgba(0,104,181,0.03) 20px
            );
        }

        .error-container {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 600px;
            padding: 0 var(--spacing-lg);
        }

        .error-code {
            font-size: 180px;
            font-weight: 900;
            line-height: 1;
            background: linear-gradient(135deg, var(--deep-blue) 0%, var(--primary-blue) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: var(--spacing-lg);
            position: relative;
            display: inline-block;
        }

        .error-code::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: var(--accent-yellow);
            border-radius: 2px;
        }

        .error-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--gray-900);
            margin-bottom: var(--spacing-md);
        }

        .error-message {
            font-size: 18px;
            color: var(--gray-600);
            line-height: 1.6;
            margin-bottom: var(--spacing-xl);
        }

        .error-illustration {
            width: 300px;
            height: 200px;
            margin: 0 auto var(--spacing-xl);
            position: relative;
        }

        /* 服务器机架插画 */
        .server-rack {
            width: 100%;
            height: 100%;
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 20px;
            background: #2d2d2d;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }

        .server-unit {
            flex: 1;
            background: linear-gradient(90deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
            border-radius: 4px;
            position: relative;
            display: flex;
            align-items: center;
            padding: 0 15px;
            border: 1px solid #444;
        }

        .server-unit::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: repeating-linear-gradient(
                90deg,
                transparent,
                transparent 1px,
                rgba(255,255,255,0.05) 1px,
                rgba(255,255,255,0.05) 2px
            );
        }

        .server-lights {
            display: flex;
            gap: 6px;
        }

        .led {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #444;
            animation: blink 2s infinite;
        }

        .led:nth-child(1) {
            animation-delay: 0s;
            background: #ff0000;
        }

        .led:nth-child(2) {
            animation-delay: 0.5s;
            background: #00ff00;
        }

        .led:nth-child(3) {
            animation-delay: 1s;
            background: #0080ff;
        }

        @keyframes blink {
            0%, 50% { opacity: 0.3; }
            25% { opacity: 1; box-shadow: 0 0 10px currentColor; }
        }

        .disconnected-cable {
            position: absolute;
            right: -50px;
            top: 50%;
            transform: translateY(-50%);
            width: 60px;
            height: 4px;
            background: #666;
        }

        .disconnected-cable::after {
            content: '✕';
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--error-red);
            font-size: 24px;
            font-weight: bold;
        }

        .error-actions {
            display: flex;
            gap: var(--spacing-md);
            justify-content: center;
            margin-bottom: var(--spacing-xl);
        }

        .error-suggestions {
            text-align: left;
            background: white;
            padding: var(--spacing-lg);
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }

        .error-suggestions h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--gray-900);
            margin-bottom: var(--spacing-md);
        }

        .error-suggestions ul {
            list-style: none;
        }

        .error-suggestions li {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            margin-bottom: var(--spacing-sm);
        }

        .error-suggestions li::before {
            content: '→';
            color: var(--primary-blue);
            font-weight: 700;
        }

        .error-suggestions a {
            color: var(--primary-blue);
            text-decoration: none;
            font-weight: 500;
        }

        .error-suggestions a:hover {
            text-decoration: underline;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 120px;
            }

            .error-title {
                font-size: 24px;
            }

            .error-message {
                font-size: 16px;
            }

            .error-illustration {
                width: 250px;
                height: 150px;
            }

            .error-actions {
                flex-direction: column;
                width: 100%;
            }

            .error-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }