/* CSS Reset & General */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        :root {
            --bg-main: #f8fafe;
            --bg-card: rgba(255, 255, 255, 0.85);
            --bg-holo-light: linear-gradient(135deg, rgba(230, 220, 255, 0.4) 0%, rgba(200, 235, 255, 0.4) 50%, rgba(255, 220, 240, 0.4) 100%);
            --holo-border: linear-gradient(135deg, #a8c0ff 0%, #3f2b96 50%, #f8ceec 100%);
            --holo-glow: linear-gradient(90deg, #7f00ff, #e100ff, #00dbde, #fc00ff);
            --text-main: #1e2238;
            --text-muted: #5a6282;
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --accent-cyan: #0ea5e9;
            --accent-pink: #ec4899;
            --shadow-subtle: 0 10px 30px -5px rgba(31, 41, 55, 0.08);
            --shadow-holo: 0 12px 35px rgba(127, 0, 255, 0.15);
            --radius-lg: 16px;
            --radius-md: 10px;
            --container-max: 1200px;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            background: radial-gradient(circle at 10% 20%, rgba(224, 231, 255, 0.6) 0%, rgba(248, 250, 254, 1) 90%);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        a:hover {
            color: var(--accent-pink);
        }

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

        /* 镭射高光装饰条 */
        .holo-bar {
            height: 4px;
            width: 100%;
            background: var(--holo-glow);
            background-size: 300% 300%;
            animation: holoShift 6s ease infinite;
        }

        @keyframes holoShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

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

        .brand-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .brand-title {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, #3b82f6, #8b5cf6, #ec4899);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            gap: 0; /* Strictly required gap: 0 */
            align-items: center;
            list-style: none;
        }

        .nav-links li a {
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 6px;
            white-space: nowrap;
        }

        .nav-links li a:hover {
            background: rgba(99, 102, 241, 0.08);
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }

        .btn-holographic {
            background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
            color: #ffffff;
            background-size: 200% 200%;
            animation: holoShift 4s ease infinite;
        }

        .btn-holographic:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(168, 85, 247, 0.35);
            color: #ffffff;
        }

        .btn-outline {
            background: #ffffff;
            color: var(--text-main);
            border: 1px solid #cbd5e1;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(99, 102, 241, 0.04);
        }

        .menu-toggle {
            display: none;
            font-size: 24px;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-main);
        }

        /* Hero Section (NO IMAGES PER RULE) */
        .hero-section {
            padding: 80px 0 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 50% 30%, rgba(192, 132, 252, 0.15), transparent 70%);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(168, 85, 247, 0.3);
            font-size: 13px;
            font-weight: 600;
            color: #7c3aed;
            margin-bottom: 24px;
            box-shadow: 0 4px 15px rgba(124, 58, 237, 0.08);
        }

        .hero-h1 {
            font-size: 38px;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0f172a 30%, #4338ca 70%, #6d28d9 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .hero-cta-group .btn {
            padding: 14px 32px;
            font-size: 16px;
        }

        .model-tags-cloud {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            max-width: 900px;
            margin: 0 auto;
        }

        .model-chip {
            background: rgba(255, 255, 255, 0.75);
            border: 1px solid rgba(203, 213, 225, 0.8);
            padding: 5px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            color: #475569;
            backdrop-filter: blur(4px);
            transition: all 0.3s ease;
        }

        .model-chip:hover {
            border-color: #8b5cf6;
            color: #7c3aed;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
        }

        /* Stats Section */
        .stats-bar {
            padding: 30px 0;
            margin-bottom: 60px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-subtle);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }

        .stat-card {
            text-align: center;
            padding: 10px;
            border-right: 1px solid #f1f5f9;
        }

        .stat-card:last-child {
            border-right: none;
        }

        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: #3b82f6;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Section Layouts */
        .section-padding {
            padding: 70px 0;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .section-subtitle {
            text-transform: uppercase;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.5px;
            color: #8b5cf6;
            margin-bottom: 8px;
            display: block;
        }

        .section-title {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-muted);
        }

        /* Cards & Grid Styling */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

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

        .holo-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid rgba(255, 255, 255, 0.9);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
            backdrop-filter: blur(10px);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }

        .holo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--holo-border);
            opacity: 0.7;
            transition: opacity 0.3s;
        }

        .holo-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(99, 102, 241, 0.12);
        }

        .holo-card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            color: var(--primary);
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .card-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* About Section Media Integration */
        .about-box {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-subtle);
            border: 1px solid #e2e8f0;
        }

        .media-banner-wrapper {
            margin-top: 30px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0,0,0,0.06);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .ai-page-image {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: 8px;
            display: block;
        }

        /* Comparison Review Section */
        .review-header-badge {
            background: linear-gradient(135deg, #fff7ed, #ffedd5);
            border: 1px solid #fed7aa;
            padding: 16px 24px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: space-around;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 15px;
        }

        .review-score-item {
            text-align: center;
        }

        .score-val {
            font-size: 28px;
            font-weight: 900;
            color: #ea580c;
        }

        .star-rating {
            color: #f59e0b;
            font-size: 20px;
            letter-spacing: 2px;
        }

        .table-wrapper {
            width: 100%;
            overflow-x: auto;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid #e2e8f0;
            box-shadow: var(--shadow-subtle);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid #f1f5f9;
        }

        .comparison-table th {
            background: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .comparison-table .highlight-col {
            background: rgba(99, 102, 241, 0.04);
            font-weight: 600;
            color: var(--primary);
        }

        /* Token Pricing Matrix */
        .price-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid #e2e8f0;
            text-align: center;
            position: relative;
        }

        .price-card.popular {
            border: 2px solid #8b5cf6;
            box-shadow: 0 10px 30px rgba(139, 92, 246, 0.15);
        }

        .popular-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(90deg, #7c3aed, #ec4899);
            color: #ffffff;
            padding: 2px 14px;
            border-radius: 12px;
            font-size: 11px;
            font-weight: 700;
        }

        .price-val {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-main);
            margin: 14px 0;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #ffffff;
            user-select: none;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
            border-top: 1px solid #f1f5f9;
        }

        .faq-item.active .faq-answer {
            display: block;
            padding-top: 14px;
        }

        .faq-toggle-icon {
            font-size: 18px;
            transition: transform 0.3s;
        }

        .faq-item.active .faq-toggle-icon {
            transform: rotate(45deg);
        }

        /* Form Section */
        .form-container {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-subtle);
            border: 1px solid #e2e8f0;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-control {
            padding: 12px 16px;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 110px;
        }

        /* Articles & Friendship Links Section */
        .articles-box, .links-box {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid #e2e8f0;
            margin-top: 30px;
        }

        .articles-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .article-item-link {
            padding: 8px 16px;
            background: #f1f5f9;
            border-radius: 6px;
            font-size: 13px;
            color: #475569;
        }

        .article-item-link:hover {
            background: #e0e7ff;
            color: var(--primary);
        }

        .friend-links-container {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 12px;
        }

        .friend-links-container a {
            font-size: 13px;
            color: var(--text-muted);
            background: #f8fafc;
            padding: 6px 14px;
            border-radius: 6px;
            border: 1px solid #e2e8f0;
        }

        .friend-links-container a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Customer Reviews */
        .review-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid #e2e8f0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
        }

        .user-avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, #a855f7, #6366f1);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .user-info h4 {
            font-size: 14px;
            font-weight: 700;
        }

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

        /* Footer Section */
        .site-footer {
            background: #111827;
            color: #9ca3af;
            padding: 60px 0 30px;
            margin-top: 80px;
            border-top: 1px solid #1f2937;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col p {
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 12px;
        }

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

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

        .footer-links li a {
            color: #9ca3af;
            font-size: 13px;
        }

        .footer-links li a:hover {
            color: #ffffff;
        }

        .qr-wrapper {
            background: #ffffff;
            padding: 8px;
            border-radius: 8px;
            display: inline-block;
            max-width: 130px;
        }

        .qr-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }

        .footer-bottom {
            border-top: 1px solid #1f2937;
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #6b7280;
        }

        /* Floating Contact Widget */
        .floating-widget {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            cursor: pointer;
            border: 1px solid #e2e8f0;
            transition: all 0.3s;
            position: relative;
        }

        .float-btn:hover {
            transform: scale(1.1);
            background: var(--primary);
            color: #ffffff;
        }

        .float-qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 140px;
            text-align: center;
        }

        .float-btn:hover .float-qr-popover {
            display: block;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .grid-4, .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-card {
                border-right: none;
                border-bottom: 1px solid #f1f5f9;
                padding-bottom: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px 0;
                box-shadow: 0 10px 25px rgba(0,0,0,0.1);
                border-bottom: 1px solid #e2e8f0;
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 24px;
                width: 100%;
                display: block;
            }
            .grid-2, .grid-3, .grid-4 {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .media-banner-wrapper {
                grid-template-columns: 1fr;
            }
        }