/* ====== 独享CSS部分 ====== */
        
        /* 背景动画元素 */
        .floating-shapes {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .floating-shape {
            position: absolute;
            border-radius: 50%;
            background: var(--gradient-secondary);
            opacity: 0.05;
            z-index: -1;
        }

        .shape-1 {
            width: 400px;
            height: 400px;
            top: 10%;
            right: -200px;
            animation: float-1 25s infinite ease-in-out;
        }

        .shape-2 {
            width: 300px;
            height: 300px;
            bottom: 10%;
            left: -150px;
            animation: float-2 30s infinite ease-in-out;
        }

        .shape-3 {
            width: 200px;
            height: 200px;
            top: 50%;
            right: 10%;
            animation: float-3 20s infinite ease-in-out;
        }

        @keyframes float-1 {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(30px, 50px) rotate(120deg); }
            66% { transform: translate(-20px, 30px) rotate(240deg); }
        }

        @keyframes float-2 {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(-40px, 30px) rotate(120deg); }
            66% { transform: translate(20px, -20px) rotate(240deg); }
        }

        @keyframes float-3 {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(20px, -30px) rotate(120deg); }
            66% { transform: translate(-30px, 20px) rotate(240deg); }
        }

        /* ==================== 404页面主要区域 - 完全水平居中 ==================== */
        .error-404 {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 200px 0 120px;
            background: linear-gradient(135deg, rgba(0, 102, 204, 0.05) 0%, rgba(0, 160, 233, 0.03) 100%);
            overflow: hidden;
        }

        /* 中心容器 - 确保完全水平居中 */
        .error-center-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 100%;
            max-width: 1000px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
            padding: 0 20px;
        }

        /* 404数字动画效果 - 完全居中 */
        .error-number {
            font-size: 18rem;
            font-weight: 900;
            line-height: 1;
            margin-bottom: 20px;
            position: relative;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
            animation: error-pulse 3s ease-in-out infinite;
            letter-spacing: -10px;
            text-align: center;
            display: block;
            width: 100%;
        }

        .error-number span {
            display: inline-block;
        }

        .error-number span:nth-child(1) {
            animation-delay: 0s;
        }

        .error-number span:nth-child(2) {
            animation-delay: 0.1s;
        }

        .error-number span:nth-child(3) {
            animation-delay: 0.2s;
        }

        @keyframes error-pulse {
            0%, 100% {
                transform: scale(1);
                text-shadow: 0 10px 30px rgba(0, 102, 204, 0.2);
            }
            50% {
                transform: scale(1.05);
                text-shadow: 0 20px 50px rgba(0, 102, 204, 0.4);
            }
        }

        /* 404标题 - 完全居中 */
        .error-title {
            font-size: 3.5rem;
            margin-bottom: 30px;
            color: var(--dark-color);
            position: relative;
            display: inline-block;
            text-align: center;
            width: 100%;
        }

        .error-title:after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 150px;
            height: 4px;
            background: var(--gradient-primary);
            border-radius: 2px;
        }

        /* 错误信息 - 完全居中 */
        .error-message {
            font-size: 1.4rem;
            max-width: 700px;
            margin: 0 auto 50px;
            color: var(--gray-color);
            line-height: 1.8;
            text-align: center;
            width: 100%;
        }

        /* 404页面图标动画 - 完全居中 */
        .error-icon {
            font-size: 8rem;
            color: var(--secondary-color);
            margin-bottom: 40px;
            position: relative;
            animation: icon-float 5s ease-in-out infinite;
            text-align: center;
            display: block;
            width: 100%;
        }

        @keyframes icon-float {
            0%, 100% {
                transform: translateY(0) rotate(0deg);
            }
            33% {
                transform: translateY(-20px) rotate(10deg);
            }
            66% {
                transform: translateY(10px) rotate(-5deg);
            }
        }

        /* 按钮组 - 完全居中 */
        .button-group {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-top: 40px;
            width: 100%;
            text-align: center;
        }

        /* ==================== 其他部分样式 ==================== */
        
        /* 404页面链接网格 */
        .quick-links {
            position: relative;
            padding: 100px 0;
            background: white;
        }

        .links-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 35px;
            margin-top: 50px;
        }

        .link-card {
            background: var(--light-bg);
            border-radius: var(--border-radius);
            padding: 50px 40px;
            text-align: center;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0, 102, 204, 0.1);
        }

        .link-card:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: var(--gradient-primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
        }

        .link-card:hover:before {
            transform: scaleX(1);
        }

        .link-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 25px 60px rgba(0, 102, 204, 0.12);
            border-color: rgba(0, 102, 204, 0.2);
        }

        .link-icon {
            width: 100px;
            height: 100px;
            background: rgba(0, 102, 204, 0.05);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 30px;
            font-size: 2.8rem;
            color: var(--primary-color);
            transition: var(--transition);
            border: 1px solid rgba(0, 102, 204, 0.1);
        }

        .link-card:hover .link-icon {
            background: var(--gradient-primary);
            color: white;
            transform: scale(1.1);
        }

        .link-card h3 {
            margin-bottom: 20px;
            color: var(--dark-color);
        }

        .link-card p {
            margin-bottom: 25px;
            color: var(--gray-color);
        }

        /* 错误原因列表 */
        .error-reasons {
            position: relative;
            padding: 100px 0;
            background: var(--light-bg);
        }

        .reasons-list {
            max-width: 800px;
            margin: 50px auto 0;
            background: white;
            border-radius: var(--border-radius);
            padding: 50px;
            box-shadow: var(--box-shadow);
            border: 1px solid rgba(0, 102, 204, 0.1);
            text-align: left;
        }

        .reasons-list h3 {
            text-align: center;
            margin-bottom: 40px;
            color: var(--dark-color);
        }

        .reason-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 30px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(0, 102, 204, 0.05);
        }

        .reason-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }

        .reason-number {
            min-width: 40px;
            height: 40px;
            background: var(--gradient-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-right: 20px;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .reason-content h4 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }

        /* 动画效果 */
        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-20px);
            }
        }

        @keyframes pulse-glow {
            0%, 100% {
                box-shadow: 0 0 20px rgba(0, 160, 233, 0.5);
            }
            50% {
                box-shadow: 0 0 40px rgba(0, 160, 233, 0.8);
            }
        }

        .float-animation {
            animation: float 5s ease-in-out infinite;
        }

        .pulse-glow-animation {
            animation: pulse-glow 2s ease-in-out infinite;
        }

        .animate-on-scroll {
            opacity: 0;
            transform: translateY(50px);
            transition: opacity 1s cubic-bezier(0.19, 1, 0.22, 1), transform 1s cubic-bezier(0.19, 1, 0.22, 1);
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 404数字单独动画 */
        .number-animate {
            display: inline-block;
            animation: number-float 3s ease-in-out infinite;
        }

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

        /* ==================== 响应式调整 ==================== */
        @media (max-width: 1200px) {
            .links-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .error-number {
                font-size: 15rem;
            }
            
            .error-title {
                font-size: 3rem;
            }
            
            .error-center-container {
                max-width: 800px;
            }
        }

        @media (max-width: 992px) {
            .error-number {
                font-size: 12rem;
                letter-spacing: -5px;
            }
            
            .error-title {
                font-size: 2.5rem;
            }
            
            .error-message {
                font-size: 1.2rem;
            }
            
            .links-grid {
                grid-template-columns: 1fr;
            }
            
            .error-center-container {
                max-width: 700px;
            }
        }

        @media (max-width: 768px) {
            .error-number {
                font-size: 9rem;
                letter-spacing: -3px;
            }
            
            .error-title {
                font-size: 2rem;
            }
            
            .error-message {
                font-size: 1.1rem;
                padding: 0 15px;
            }
            
            .error-icon {
                font-size: 6rem;
            }
            
            .button-group {
                flex-direction: column;
                align-items: center;
                padding: 0 15px;
            }
            
            .button-group .btn {
                width: 100%;
                max-width: 300px;
            }
            
            .reasons-list {
                padding: 30px 20px;
            }
            
            .error-center-container {
                padding: 0 15px;
            }
        }

        @media (max-width: 480px) {
            .error-number {
                font-size: 7rem;
            }
            
            .error-icon {
                font-size: 5rem;
            }
            
            .error-title {
                font-size: 1.8rem;
            }
            
            .error-message {
                font-size: 1rem;
            }
        }

        /* 专门确保404内容绝对居中 */
        .error-404-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 100%;
            text-align: center;
        }

        /* 确保所有子元素居中 */
        .error-404-content > * {
            text-align: center;
            width: 100%;
            max-width: 100%;
        }