/* CSS Reset & Variables */
        :root {
            --primary: #2563eb;       /* 艳蓝色 */
            --primary-hover: #1d4ed8;
            --secondary: #ea580c;     /* 亮橙色 */
            --accent: #d946ef;        /* 霓虹紫 */
            --dark: #0f172a;          /* 深蓝黑 */
            --light: #f8fafc;         /* 浅背景色 */
            --white: #ffffff;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --border-width: 3px;
            --box-shadow-offset: 6px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light);
            color: var(--dark);
        }

        body {
            line-height: 1.6;
        }

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

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 800;
            color: var(--dark);
            line-height: 1.2;
        }

        /* Neo-brutalist Bold Style Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            cursor: pointer;
            border: var(--border-width) solid var(--dark);
            border-radius: 8px;
            transition: all 0.2s ease;
            position: relative;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .btn-primary:hover {
            transform: translate(-2px, -2px);
            box-shadow: calc(var(--box-shadow-offset) + 2px) calc(var(--box-shadow-offset) + 2px) 0 var(--dark);
        }

        .btn-secondary {
            background-color: var(--secondary);
            color: var(--white);
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .btn-secondary:hover {
            transform: translate(-2px, -2px);
            box-shadow: calc(var(--box-shadow-offset) + 2px) calc(var(--box-shadow-offset) + 2px) 0 var(--dark);
        }

        .btn-accent {
            background-color: var(--accent);
            color: var(--white);
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .btn-accent:hover {
            transform: translate(-2px, -2px);
            box-shadow: calc(var(--box-shadow-offset) + 2px) calc(var(--box-shadow-offset) + 2px) 0 var(--dark);
        }

        /* Header Navigation */
        .header {
            background-color: var(--white);
            border-bottom: var(--border-width) solid var(--dark);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 15px 0;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

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

        .ai-page-logo {
            height: 45px;
            width: auto;
        }

        .nav {
            display: flex;
            gap: 20px;
        }

        .nav a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 4px;
            transition: all 0.2s ease;
        }

        .nav a:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
        }

        /* Section Layouts */
        section {
            padding: 80px 0;
            border-bottom: var(--border-width) solid var(--dark);
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 50px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 10%;
            width: 80%;
            height: 6px;
            background-color: var(--secondary);
            border: 2px solid var(--dark);
        }

        /* Hero Section (No Images!) */
        .hero {
            background: radial-gradient(circle at 10% 20%, rgb(239, 246, 255) 0%, rgb(219, 234, 254) 100%);
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-block;
            background-color: var(--accent);
            color: var(--white);
            padding: 8px 16px;
            font-weight: 800;
            font-size: 0.9rem;
            border: 2px solid var(--dark);
            border-radius: 50px;
            margin-bottom: 20px;
            transform: rotate(-1.5deg);
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 25px;
            letter-spacing: -0.5px;
            text-transform: uppercase;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--gray-600);
            max-width: 800px;
            margin: 0 auto 40px auto;
            font-weight: 500;
        }

        .hero-ctas {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        /* Metrics Cards */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .metric-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            transition: all 0.2s ease;
        }

        .metric-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: calc(var(--box-shadow-offset) + 3px) calc(var(--box-shadow-offset) + 3px) 0 var(--dark);
        }

        .metric-num {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 10px;
        }

        .metric-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
        }

        /* About Us & Platform Intro Grid */
        .grid-two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .grid-image-container {
            border: var(--border-width) solid var(--dark);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .grid-image-container img {
            width: 100%;
            display: block;
        }

        .intro-text p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            color: var(--gray-600);
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 25px;
        }

        .intro-feat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
        }

        .intro-feat-icon {
            width: 24px;
            height: 24px;
            background-color: var(--secondary);
            border: 2px solid var(--dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--white);
        }

        /* Service Cards (Grid) */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            padding: 35px 25px;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            transition: all 0.2s ease;
        }

        .service-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: calc(var(--box-shadow-offset) + 3px) calc(var(--box-shadow-offset) + 3px) 0 var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--accent);
            border: 2px solid var(--dark);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--white);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.35rem;
            margin-bottom: 15px;
        }

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        /* Models Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
            max-width: 1000px;
            margin-left: auto;
            margin-right: auto;
        }

        .tag-cloud span {
            background-color: var(--white);
            border: 2px solid var(--dark);
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }

        .tag-cloud span:hover {
            background-color: var(--secondary);
            color: var(--white);
            transform: translateY(-2px);
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            padding: 30px 20px;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .solution-card h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        .solution-list {
            list-style: none;
            margin-top: 15px;
        }

        .solution-list li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--gray-600);
        }

        .solution-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        /* Timeline Process */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 6px;
            background-color: var(--dark);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
            width: 50%;
            padding-right: 40px;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            margin-left: 50%;
            padding-right: 0;
            padding-left: 40px;
            text-align: left;
        }

        .timeline-badge {
            position: absolute;
            top: 0;
            right: -23px;
            width: 40px;
            height: 40px;
            background-color: var(--accent);
            border: 4px solid var(--dark);
            border-radius: 50%;
            color: var(--white);
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }

        .timeline-item:nth-child(even) .timeline-badge {
            left: -23px;
            right: auto;
        }

        .timeline-content {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            padding: 20px;
            border-radius: 8px;
            box-shadow: 4px 4px 0 var(--dark);
            display: inline-block;
            max-width: 100%;
        }

        .timeline-content h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary);
        }

        /* Table Styles (Comparison & Token Compare) */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            background-color: var(--white);
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            margin-bottom: 30px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 2px solid var(--gray-200);
        }

        th {
            background-color: var(--light);
            color: var(--dark);
            font-weight: 800;
        }

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

        .rating-badge {
            background-color: #fef08a;
            color: #854d0e;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.85rem;
            border: 1px solid #eab308;
            display: inline-block;
        }

        /* Match Wizard Mock / Selection Tool */
        .match-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 16px;
            padding: 40px;
            max-width: 800px;
            margin: 0 auto;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

        .match-steps {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 15px;
            margin-bottom: 30px;
        }

        .match-step-btn {
            background: var(--light);
            border: 2px solid var(--dark);
            padding: 12px;
            border-radius: 8px;
            font-weight: 700;
            cursor: pointer;
            text-align: center;
            transition: all 0.2s ease;
        }

        .match-step-btn.active {
            background-color: var(--primary);
            color: var(--white);
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 850px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 8px;
            margin-bottom: 15px;
            box-shadow: 4px 4px 0 var(--dark);
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 25px;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            background-color: var(--white);
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            transition: transform 0.2s ease;
        }

        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 25px;
            color: var(--gray-600);
            border-top: 0 solid var(--gray-200);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 20px 25px;
            border-top-width: 2px;
        }

        /* Reviews / Testimonials */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .review-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-style: italic;
            color: var(--gray-600);
            margin-bottom: 20px;
            position: relative;
        }

        .review-text::before {
            content: '“';
            font-size: 4rem;
            position: absolute;
            top: -30px;
            left: -15px;
            color: var(--accent);
            opacity: 0.2;
            font-family: serif;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 15px;
            border-top: 2px solid var(--gray-200);
            padding-top: 15px;
        }

        .author-avatar {
            width: 45px;
            height: 45px;
            background-color: var(--secondary);
            border: 2px solid var(--dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: var(--white);
        }

        .author-info h4 {
            font-size: 0.95rem;
            font-weight: 800;
        }

        .author-info p {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        /* Article / Knowledge base */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .article-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            display: flex;
            flex-direction: column;
        }

        .article-content {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-tag {
            align-self: flex-start;
            background-color: var(--accent);
            color: var(--white);
            padding: 4px 10px;
            font-size: 0.8rem;
            font-weight: 700;
            border: 1px solid var(--dark);
            border-radius: 4px;
            margin-bottom: 15px;
        }

        .article-card h3 {
            font-size: 1.2rem;
            margin-bottom: 15px;
        }

        .article-link {
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 15px;
        }

        .article-link:hover {
            text-decoration: underline;
        }

        /* Form section */
        .form-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .form-card {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
        }

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

        .form-group label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid var(--dark);
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.2s ease;
        }

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

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* Contact details side block */
        .contact-info-block {
            background-color: var(--white);
            border: var(--border-width) solid var(--dark);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--box-shadow-offset) var(--box-shadow-offset) 0 var(--dark);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-methods {
            margin-bottom: 30px;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 25px;
        }

        .contact-item-icon {
            width: 40px;
            height: 40px;
            background-color: var(--secondary);
            border: 2px solid var(--dark);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--white);
            flex-shrink: 0;
        }

        .contact-item-detail h4 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .contact-item-detail p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        .qr-codes {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            text-align: center;
        }

        .qr-item {
            border: 2px solid var(--dark);
            border-radius: 8px;
            padding: 15px;
            background: var(--light);
        }

        .qr-item img {
            width: 130px;
            height: 130px;
            object-fit: cover;
            border: 2px solid var(--dark);
            margin-bottom: 8px;
        }

        .qr-item p {
            font-weight: 700;
            font-size: 0.85rem;
        }

        /* Footer */
        .footer {
            background-color: var(--dark);
            color: #cbd5e1;
            padding: 60px 0 30px 0;
            border-top: var(--border-width) solid var(--dark);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .footer-col h4 {
            color: var(--white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 40px;
            height: 3px;
            background-color: var(--accent);
        }

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

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s ease;
            font-size: 0.95rem;
        }

        .footer-col ul li a:hover {
            color: var(--white);
        }

        /* Friendlinks & Copyright styling */
        .friend-links {
            border-top: 1px solid #334155;
            padding: 20px 0;
            margin-bottom: 20px;
            font-size: 0.85rem;
        }

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
        }

        /* Floating Sidebar */
        .floating-bar {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background-color: var(--white);
            border: 2px solid var(--dark);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 3px 3px 0 var(--dark);
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            font-size: 0.8rem;
            position: relative;
            transition: all 0.2s ease;
        }

        .float-item:hover {
            background-color: var(--primary);
            color: var(--white);
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0 var(--dark);
        }

        .float-item .popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--white);
            border: 2px solid var(--dark);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 4px 4px 0 var(--dark);
            display: none;
            text-align: center;
            z-index: 10;
        }

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

        .float-item .popover img {
            width: 120px;
            height: 120px;
            object-fit: cover;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .grid-two-col {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .form-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--white);
                border-bottom: var(--border-width) solid var(--dark);
                padding: 20px;
                gap: 15px;
            }

            .nav.show {
                display: flex;
            }

            .nav-toggle {
                display: flex;
            }

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

        @media (max-width: 600px) {
            .timeline::before {
                left: 20px;
            }

            .timeline-item {
                width: 100%;
                text-align: left;
                padding-right: 0;
                padding-left: 50px;
            }

            .timeline-item:nth-child(even) {
                margin-left: 0;
                padding-left: 50px;
            }

            .timeline-badge {
                left: 0 !important;
                right: auto !important;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-desc {
                font-size: 1rem;
            }

            .match-steps {
                grid-template-columns: 1fr;
            }
        }