:root {
            --bg-color: #0b0f19;
            --text-main: #f3f4f6;
            --text-muted: #9ca3af;
            --neon-blue: #00f0ff;
            --neon-green: #39ff14;
            --neon-pink: #ff007f;
            --card-bg: rgba(17, 24, 39, 0.8);
            --border-color: rgba(255, 255, 255, 0.1);
        }

        /* 统一使用基于暗色炫彩荧光风的设计，以契合“炫彩荧光”主题，同时确保文字高对比度可读 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(0, 240, 255, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 0, 127, 0.05) 0%, transparent 40%);
        }

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

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(11, 15, 25, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .logo-text {
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(45deg, var(--neon-blue), var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
        }

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

        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
            font-weight: 500;
        }

        .nav-menu a:hover {
            color: var(--neon-blue);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
        }

        .nav-btn {
            background: linear-gradient(90deg, var(--neon-blue), var(--neon-green));
            color: #000;
            padding: 8px 18px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(57, 255, 20, 0.7);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
        }

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

        /* Hero */
        .hero {
            padding: 160px 0 100px;
            text-align: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 300px;
            height: 300px;
            background: var(--neon-blue);
            filter: blur(150px);
            opacity: 0.15;
            z-index: -1;
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #ffffff 30%, var(--neon-blue) 70%, var(--neon-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(90deg, var(--neon-blue), var(--neon-pink));
            color: #ffffff;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 0 25px rgba(255, 0, 127, 0.5);
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-main);
            border: 2px solid var(--neon-blue);
            padding: 13px 38px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            transition: all 0.3s;
        }

        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        /* Section Global styling */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            display: inline-block;
            background: linear-gradient(90deg, var(--neon-blue), var(--neon-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-title p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Grid Lists */
        .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(250px, 1fr));
            gap: 25px;
        }

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

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-blue), var(--neon-pink));
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 10px 30px rgba(0, 240, 255, 0.15);
        }

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

        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #fff;
        }

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

        /* Stats Cards */
        .stats-container {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: -40px;
            margin-bottom: 60px;
            background: rgba(17, 24, 39, 0.9);
            border: 1px solid var(--neon-blue);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        .stat-item {
            text-align: center;
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--neon-green);
            text-shadow: 0 0 10px rgba(57, 255, 20, 0.3);
        }

        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 5px;
        }

        /* Model tags Cloud */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 30px;
        }

        .tag {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            transition: all 0.3s;
        }

        .tag:hover {
            border-color: var(--neon-pink);
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.4);
            color: #fff;
            transform: scale(1.05);
        }

        /* Step flow */
        .flow-container {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            position: relative;
        }

        .flow-step {
            flex: 1;
            min-width: 200px;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--neon-pink);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px;
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.6);
        }

        /* Compare Table */
        .table-wrapper {
            overflow-x: auto;
            margin-top: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: var(--card-bg);
        }

        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: rgba(255, 255, 255, 0.02);
            color: #fff;
            font-weight: 600;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .highlight-row {
            background: rgba(0, 240, 255, 0.03);
            border: 1px solid var(--neon-blue);
        }

        .rating-stars {
            color: #ffd700;
            font-size: 1.2rem;
        }

        /* Form */
        .form-section {
            background: linear-gradient(180deg, var(--bg-color), rgba(11, 15, 25, 0.95));
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .contact-item-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--neon-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-blue);
        }

        .contact-form {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--text-main);
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: #fff;
            transition: all 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--neon-blue);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }

        .btn-submit {
            width: 100%;
            padding: 14px;
            background: linear-gradient(90deg, var(--neon-blue), var(--neon-green));
            border: none;
            border-radius: 8px;
            color: #000;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-submit:hover {
            box-shadow: 0 0 20px rgba(57, 255, 20, 0.6);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--card-bg);
            overflow: hidden;
            transition: all 0.3s;
        }

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

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--neon-blue);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

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

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-bottom: 20px;
        }

        /* Image Display Sections */
        .image-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .gallery-item {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: #1f2937;
            position: relative;
        }

        .gallery-item img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s;
        }

        .gallery-item:hover img {
            transform: scale(1.08);
        }

        .gallery-desc {
            padding: 15px;
            background: rgba(17, 24, 39, 0.95);
            border-top: 1px solid var(--border-color);
        }

        /* User Testimonials */
        .testimonials {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            position: relative;
        }

        .user-meta {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 15px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--neon-pink);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
        }

        /* Floating Contact Widget */
        .floating-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 999;
        }

        .widget-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--card-bg);
            border: 1px solid var(--neon-blue);
            color: var(--neon-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
            transition: all 0.3s;
            text-decoration: none;
        }

        .widget-btn:hover {
            background: var(--neon-blue);
            color: #000;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
        }

        .qr-popover {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: var(--card-bg);
            border: 1px solid var(--neon-blue);
            padding: 15px;
            border-radius: 8px;
            display: none;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            display: block;
            margin-bottom: 8px;
        }

        .widget-btn:hover + .qr-popover, .qr-popover:hover {
            display: block;
        }

        /* Footer */
        footer {
            background: #060911;
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-title {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--neon-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;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .friend-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .friend-links a {
            color: var(--text-muted);
            text-decoration: none;
        }

        .friend-links a:hover {
            color: var(--neon-blue);
        }

        /* Mobile adjustments */
        @media (max-width: 992px) {
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--bg-color);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .flow-container {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }