/* CSS Reset & Variable */
        :root {
            --primary: #FF5500;
            --primary-hover: #E04B00;
            --secondary: #FFB300;
            --bg-light: #FAF8F5;
            --bg-alt: #F3ECE3;
            --text-main: #222222;
            --text-muted: #555555;
            --border-color: #E6DFD5;
            --shadow-light: 0 4px 20px rgba(255, 85, 0, 0.06);
            --shadow-hover: 0 10px 30px rgba(255, 85, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        /* Layout Container */
        .ai-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--text-main);
            position: relative;
            display: inline-block;
            padding-bottom: 12px;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            margin-top: 15px;
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* Buttons */
        .ai-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .ai-btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(255, 85, 0, 0.3);
        }

        .ai-btn-primary:hover {
            background-color: var(--primary-hover);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .ai-btn-secondary {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .ai-btn-secondary:hover {
            background-color: var(--primary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        /* Header Navigation */
        .ai-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(250, 248, 245, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

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

        .brand-logo img {
            max-height: 45px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 25px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--text-main);
            font-size: 0.95rem;
            font-weight: 500;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero Section (No images, strict rule) */
        .ai-hero {
            background: radial-gradient(circle at top right, rgba(255, 179, 0, 0.08), transparent 50%),
                        radial-gradient(circle at bottom left, rgba(255, 85, 0, 0.08), transparent 50%),
                        var(--bg-light);
            padding: 100px 0 80px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background-color: rgba(255, 85, 0, 0.1);
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 30px;
            margin-bottom: 20px;
        }

        .ai-hero h1 {
            font-size: 3rem;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .ai-hero h1 span {
            color: var(--primary);
        }

        .hero-desc {
            max-width: 800px;
            margin: 0 auto 35px auto;
            font-size: 1.2rem;
            color: var(--text-muted);
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
        }

        .hero-features {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 20px;
        }

        .hero-feature-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1rem;
            color: var(--text-main);
            font-weight: 500;
        }

        .hero-feature-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        /* Stats Section */
        .ai-stats {
            padding: 50px 0;
            background-color: #ffffff;
            border-bottom: 1px solid var(--border-color);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-card {
            padding: 20px;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* Common Section Layout */
        .ai-section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .bg-white {
            background-color: #ffffff;
        }

        .bg-alt {
            background-color: var(--bg-alt);
        }

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

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .card-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--shadow-light);
        }

        .card-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 8px;
            background-color: rgba(255, 85, 0, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .card-item h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

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

        /* Model Badges Block */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 30px;
        }

        .model-badge {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--text-main);
            transition: var(--transition);
        }

        .model-badge:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* Showcase Section (For Image deployment) */
        .case-showcase {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
            align-items: stretch;
        }

        .main-case-img {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-light);
            height: 100%;
        }

        .main-case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .side-case-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .side-case-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px;
            transition: var(--transition);
        }

        .side-case-item:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .side-case-thumb {
            width: 100px;
            height: 100px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .side-case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .side-case-text h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }

        .side-case-text p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Flow / Steps */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .flow-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 25px 20px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .flow-num {
            width: 35px;
            height: 35px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 15px;
            box-shadow: 0 4px 10px rgba(255,85,0,0.2);
        }

        /* Comparison Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-light);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background-color: #ffffff;
            text-align: left;
            min-width: 800px;
        }

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

        .compare-table th {
            background-color: var(--bg-alt);
            font-weight: 700;
            color: var(--text-main);
        }

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

        .compare-table tr.highlight {
            background-color: rgba(255, 85, 0, 0.03);
        }

        .rating-badge {
            display: inline-block;
            padding: 4px 10px;
            background-color: rgba(255, 85, 0, 0.1);
            color: var(--primary);
            border-radius: 4px;
            font-weight: 700;
        }

        .star-icon {
            color: var(--secondary);
            font-size: 1.1rem;
        }

        /* FAQ Accordion */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            width: 100%;
            padding: 20px 25px;
            text-align: left;
            background: none;
            border: none;
            outline: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

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

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 25px;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-body {
            padding-bottom: 20px;
        }

        /* Reviews Section */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow-light);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

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

        .review-user-info h4 {
            font-size: 1rem;
            margin-bottom: 2px;
        }

        .review-user-info span {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* Form Integration */
        .match-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }

        .form-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow-light);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background-color: var(--bg-light);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            background-color: #ffffff;
        }

        /* Term List (Glossary) & Training Info */
        .term-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .term-card {
            background-color: #ffffff;
            border-left: 4px solid var(--primary);
            padding: 15px 20px;
            border-radius: 0 8px 8px 0;
            box-shadow: var(--shadow-light);
        }

        .term-card h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }

        .term-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Article List (SEO Section) */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .article-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .article-card h4 a {
            color: var(--text-main);
            font-size: 1.1rem;
        }

        .article-card h4 a:hover {
            color: var(--primary);
        }

        .article-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Float Sidebar widgets */
        .ai-sidebar {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-item {
            width: 50px;
            height: 50px;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            transition: var(--transition);
            position: relative;
        }

        .sidebar-item:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        .sidebar-item svg {
            width: 22px;
            height: 22px;
        }

        .sidebar-item:hover svg {
            fill: #ffffff;
        }

        .qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: var(--shadow-hover);
            display: none;
            text-align: center;
            width: 160px;
        }

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

        .qr-popover p {
            font-size: 0.8rem;
            color: var(--text-main);
            margin-top: 5px;
        }

        .sidebar-item:hover .qr-popover {
            display: block;
        }

        /* Footer */
        .ai-footer {
            background-color: #1e1915;
            color: #d1c8be;
            padding: 60px 0 20px 0;
            border-top: 3px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo img {
            max-height: 45px;
            margin-bottom: 15px;
        }

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

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

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

        .footer-links a {
            color: #d1c8be;
        }

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

        .footer-bottom {
            border-top: 1px solid #332b24;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
            margin-bottom: 20px;
            border-top: 1px solid #332b24;
            padding-top: 20px;
        }

        .friend-links a {
            color: #a89e93;
        }

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

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-in {
            animation: fadeInUp 0.8s ease forwards;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3, .review-grid, .term-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .match-wrap {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-light);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }

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

            .menu-toggle {
                display: flex;
            }

            .nav-actions {
                display: none;
            }

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

            .hero-cta {
                flex-direction: column;
                gap: 10px;
                align-items: center;
            }

            .hero-cta .ai-btn {
                width: 100%;
                max-width: 300px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .case-showcase {
                grid-template-columns: 1fr;
            }

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

            .grid-3, .review-grid, .term-grid, .article-grid {
                grid-template-columns: 1fr;
            }

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