:root {
            --bg-color: #080214;
            --card-bg: rgba(22, 11, 43, 0.8);
            --card-border: rgba(255, 0, 127, 0.2);
            --primary-pink: #ff007f;
            --primary-purple: #8a2be2;
            --neon-blue: #00f0ff;
            --text-light: #ffffff;
            --text-gray: #a9a2c3;
            --gradient-primary: linear-gradient(135deg, #ff007f 0%, #8a2be2 100%);
            --gradient-cyber: linear-gradient(90deg, #ff007f, #8a2be2, #00f0ff, #ff007f);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-light);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 隐藏滚动条但保留功能 */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-color);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-purple);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-pink);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 2, 20, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 0, 127, 0.15);
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-box {
            display: flex;
            align-items: center;
        }

        .ai-page-logo {
            max-height: 40px;
            object-fit: contain;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--text-gray);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-pink);
            transition: width 0.3s ease;
        }

        .nav-menu a:hover::after {
            width: 100%;
        }

        .nav-menu a:hover {
            color: var(--primary-pink);
        }

        .nav-btn {
            background: var(--gradient-primary);
            color: var(--text-light);
            border: none;
            padding: 8px 20px;
            border-radius: 20px;
            cursor: pointer;
            font-weight: bold;
            text-decoration: none;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.4);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--text-light);
            transition: 0.3s;
        }

        /* Hero Section - NO IMAGES */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 50% 30%, rgba(138, 43, 226, 0.2) 0%, rgba(8, 2, 20, 0) 70%);
            text-align: center;
            position: relative;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 0, 127, 0.1);
            border: 1px solid var(--primary-pink);
            border-radius: 30px;
            color: var(--primary-pink);
            font-size: 14px;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(to right, #ffffff, #ff007f, #00f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--text-gray);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
        }

        .btn-primary {
            background: var(--gradient-primary);
            color: var(--text-light);
            padding: 15px 40px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: bold;
            text-decoration: none;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.4);
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 30px rgba(255, 0, 127, 0.7);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-light);
            border: 2px solid var(--primary-purple);
            padding: 13px 38px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: bold;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .btn-secondary:hover {
            background: rgba(138, 43, 226, 0.2);
            border-color: var(--primary-pink);
            box-shadow: 0 0 20px rgba(138, 43, 226, 0.4);
        }

        /* Section Layout Common */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            color: var(--text-light);
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--gradient-primary);
        }

        .section-header p {
            color: var(--text-gray);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Metrics / Data Cards */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .metric-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 30px 20px;
            border-radius: 15px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .metric-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-pink);
            box-shadow: 0 0 20px rgba(255, 0, 127, 0.2);
        }

        .metric-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-pink);
            margin-bottom: 10px;
        }

        .metric-label {
            color: var(--text-gray);
            font-size: 14px;
        }

        /* Grid Layouts for Services */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 30px;
            border-radius: 16px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-8px);
            border-color: var(--neon-blue);
            box-shadow: 0 10px 30px rgba(0, 240, 255, 0.15);
        }

        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--primary-pink);
        }

        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--text-light);
        }

        .card p {
            color: var(--text-gray);
            font-size: 0.95rem;
        }

        /* Step Timeline */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 2px;
            background: var(--primary-purple);
            top: 0;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 16px;
            right: -8px;
            background-color: var(--primary-pink);
            border: 4px solid var(--bg-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
            box-shadow: 0 0 10px var(--primary-pink);
        }

        .left {
            left: 0;
            text-align: right;
        }

        .right {
            left: 50%;
        }

        .right::after {
            left: -8px;
        }

        .timeline-content {
            padding: 20px;
            background: var(--card-bg);
            position: relative;
            border-radius: 12px;
            border: 1px solid var(--card-border);
        }

        /* Platform badges styling */
        .badge-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }

        .platform-badge {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-gray);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            transition: all 0.3s ease;
        }

        .platform-badge:hover {
            border-color: var(--primary-pink);
            color: var(--text-light);
            background: rgba(255, 0, 127, 0.1);
        }

        /* Table Design */
        .table-responsive {
            overflow-x: auto;
            margin: 40px 0;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--card-border);
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        th {
            background: rgba(138, 43, 226, 0.2);
            color: var(--text-light);
            font-weight: 600;
        }

        tr:hover {
            background: rgba(255, 0, 127, 0.05);
        }

        .highlight-col {
            color: var(--primary-pink);
            font-weight: bold;
        }

        /* FAQ Section Accordion */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            margin-bottom: 15px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 8px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            user-select: none;
            transition: background 0.3s ease;
        }

        .faq-question:hover {
            background: rgba(255, 0, 127, 0.05);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
            color: var(--text-gray);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            padding: 0 20px 20px 20px;
        }

        .faq-icon::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary-pink);
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        /* Review Grid */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 30px;
            border-radius: 16px;
            position: relative;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .avatar-placeholder {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--text-light);
        }

        .author-info h4 {
            font-size: 16px;
            margin-bottom: 2px;
        }

        .author-info p {
            font-size: 12px;
            color: var(--text-gray);
        }

        .review-stars {
            color: #ffb800;
            margin-bottom: 10px;
        }

        /* Case Studies Grid (Showcasing images allowed here) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 30px;
        }

        .case-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--card-border);
            transition: all 0.3s ease;
        }

        .case-card:hover {
            transform: translateY(-5px);
            border-color: var(--neon-blue);
        }

        .case-img-wrapper {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #1a0b36;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .case-card:hover img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(0, 240, 255, 0.1);
            color: var(--neon-blue);
            font-size: 12px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        /* Form Design */
        .contact-section {
            background: radial-gradient(circle at 10% 90%, rgba(255, 0, 127, 0.1) 0%, rgba(8, 2, 20, 0) 60%);
        }

        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            margin-bottom: 30px;
        }

        .info-icon {
            font-size: 1.5rem;
            color: var(--primary-pink);
            background: rgba(255, 0, 127, 0.1);
            padding: 10px;
            border-radius: 8px;
        }

        .info-detail h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
        }

        .info-detail p, .info-detail a {
            color: var(--text-gray);
            text-decoration: none;
        }

        .kefu-qrcode {
            margin-top: 20px;
            max-width: 180px;
            padding: 10px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            border: 1px solid var(--card-border);
        }

        .kefu-qrcode img {
            width: 100%;
            height: auto;
            border-radius: 4px;
        }

        .contact-form {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 40px;
            border-radius: 20px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            color: var(--text-gray);
        }

        .form-control {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 16px;
            border-radius: 8px;
            color: var(--text-light);
            font-size: 15px;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-pink);
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.2);
        }

        select.form-control option {
            background-color: var(--bg-color);
            color: var(--text-light);
        }

        .submit-btn {
            width: 100%;
            background: var(--gradient-primary);
            color: var(--text-light);
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: bold;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(255, 0, 127, 0.6);
        }

        /* Float Widget */
        .float-widget {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
            transition: all 0.3s ease;
            position: relative;
        }

        .float-item:hover {
            transform: scale(1.1);
        }

        .float-item svg {
            width: 24px;
            height: 24px;
            fill: #fff;
        }

        .float-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            padding: 15px;
            border-radius: 12px;
            width: 220px;
            display: none;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
            text-align: center;
        }

        .float-item:hover .float-popover {
            display: block;
        }

        .float-popover img {
            width: 100%;
            border-radius: 6px;
            margin-bottom: 8px;
        }

        .float-popover p {
            font-size: 12px;
            color: var(--text-light);
        }

        /* Footer */
        footer {
            background: #04010b;
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 0, 127, 0.15);
            color: var(--text-gray);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: var(--text-light);
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: var(--text-light);
            margin-bottom: 15px;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            color: var(--text-gray);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-links ul li a:hover {
            color: var(--primary-pink);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-bottom a {
            color: var(--text-gray);
            text-decoration: none;
            margin-right: 15px;
        }

        .footer-bottom a:hover {
            color: var(--primary-pink);
        }

        .friend-links {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .friend-links span {
            color: var(--text-light);
            font-weight: bold;
            margin-right: 10px;
        }

        /* Article List style */
        .article-list {
            list-style: none;
            padding: 0;
        }

        .article-list li {
            margin-bottom: 12px;
            border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
            padding-bottom: 8px;
        }

        .article-list a {
            color: var(--text-gray);
            text-decoration: none;
            transition: color 0.2s ease;
            font-size: 13px;
        }

        .article-list a:hover {
            color: var(--neon-blue);
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .contact-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--bg-color);
                border-bottom: 1px solid var(--card-border);
                padding: 20px;
                gap: 15px;
                text-align: center;
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .timeline::after {
                left: 31px;
            }

            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }

            .timeline-item::after {
                left: 23px;
            }

            .left {
                text-align: left;
            }

            .right {
                left: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }
        }