/* CSS Reset & Variable Definitions */
        :root {
            --color-bg: #f9f9f9;
            --color-card-bg: #ffffff;
            --color-text-main: #111111;
            --color-text-muted: #666666;
            --color-accent: #000000;
            --color-accent-hover: #333333;
            --color-border: #e0e0e0;
            --color-border-dark: #111111;
            --font-serif: "Georgia", "Playfair Display", "SimSun", serif;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --container-max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--color-bg);
            color: var(--color-text-main);
            font-family: var(--font-sans);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        /* Base Typography & Layout */
        .container {
            width: 100%;
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 100px 0;
            border-bottom: 1px solid var(--color-border);
        }

        h1, h2, h3, h4 {
            font-family: var(--font-sans);
            font-weight: 800;
            letter-spacing: -0.03em;
            text-transform: uppercase;
        }

        .section-header {
            margin-bottom: 60px;
            text-align: left;
        }

        .section-tag {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.15em;
            color: var(--color-text-muted);
            text-transform: uppercase;
            margin-bottom: 12px;
            display: inline-block;
        }

        .section-title {
            font-size: 36px;
            line-height: 1.2;
            color: var(--color-text-main);
        }

        /* Buttons & Interactions */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 14px;
            font-weight: 700;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            border: 1px solid var(--color-border-dark);
            cursor: pointer;
            transition: var(--transition);
            background: transparent;
            color: var(--color-text-main);
        }

        .btn-solid {
            background: var(--color-accent);
            color: #ffffff;
        }

        .btn-solid:hover {
            background: var(--color-accent-hover);
        }

        .btn-outline:hover {
            background: var(--color-accent);
            color: #ffffff;
        }

        /* Header & Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(249, 249, 249, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--color-border);
            height: 80px;
            display: flex;
            align-items: center;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

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

        .logo-area img {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--color-text-main);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }

        .nav-menu a:hover {
            color: var(--color-text-muted);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

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

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--color-text-main);
            transition: var(--transition);
        }

        /* Hero Section (No Images as per rule) */
        .hero {
            background: #ffffff;
            padding: 120px 0;
            border-bottom: 1px solid var(--color-border);
        }

        .hero-inner {
            max-width: 900px;
        }

        .hero-tag {
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.2em;
            margin-bottom: 24px;
            color: var(--color-text-muted);
        }

        .hero h1 {
            font-size: 64px;
            line-height: 1.1;
            margin-bottom: 32px;
            color: var(--color-text-main);
        }

        .hero-desc {
            font-size: 18px;
            color: var(--color-text-muted);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Info Metrics (Data Cards) */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1px;
            background-color: var(--color-border);
            border: 1px solid var(--color-border);
            margin-top: 60px;
        }

        .metric-card {
            background-color: var(--color-card-bg);
            padding: 40px;
            text-align: center;
        }

        .metric-num {
            font-size: 48px;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 12px;
        }

        .metric-label {
            font-size: 13px;
            color: var(--color-text-muted);
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        /* About Section (Software Intro) */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: start;
        }

        .about-text p {
            font-size: 16px;
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }

        .about-features {
            list-style: none;
        }

        .about-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 16px;
            font-size: 15px;
            font-weight: 600;
        }

        .about-features li::before {
            content: "—";
            position: absolute;
            left: 0;
            color: var(--color-text-main);
        }

        /* AIGC Services & Models (Tag Cloud & Cards) */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            padding: 40px;
            transition: var(--transition);
        }

        .service-card:hover {
            border-color: var(--color-border-dark);
            transform: translateY(-4px);
        }

        .service-icon {
            font-size: 24px;
            margin-bottom: 24px;
            font-weight: bold;
        }

        .service-title {
            font-size: 20px;
            margin-bottom: 16px;
        }

        .service-desc {
            font-size: 14px;
            color: var(--color-text-muted);
        }

        /* Cloud Tag Styling */
        .tag-cloud-container {
            margin-top: 60px;
            background: var(--color-card-bg);
            padding: 40px;
            border: 1px solid var(--color-border);
        }

        .tag-cloud-title {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-item {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }

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

        /* Steps & Workflow */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            position: relative;
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            padding: 40px 32px;
        }

        .step-num {
            font-size: 14px;
            font-weight: 800;
            color: var(--color-text-muted);
            margin-bottom: 24px;
            display: block;
        }

        .step-title {
            font-size: 18px;
            margin-bottom: 16px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        /* Comparison Board (Rating & Table) */
        .rating-summary {
            background: #ffffff;
            border: 1px solid var(--color-border-dark);
            padding: 40px;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .rating-info h4 {
            font-size: 24px;
            margin-bottom: 8px;
        }

        .rating-stars {
            font-size: 28px;
            letter-spacing: 4px;
        }

        .rating-value {
            font-size: 48px;
            font-weight: 800;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--color-border);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background: #ffffff;
        }

        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
        }

        th {
            background: var(--color-bg);
            font-weight: 700;
            text-transform: uppercase;
        }

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

        /* Token的比价参考 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .token-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            padding: 32px;
            text-align: center;
        }

        .token-model {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .token-price {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .token-unit {
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 24px;
            display: block;
        }

        /* Case Studies (with designated image paths) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            overflow: hidden;
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--color-bg);
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            filter: grayscale(100%);
            transition: var(--transition);
        }

        .case-card:hover .case-img-container img {
            filter: grayscale(0%);
            transform: scale(1.05);
        }

        .case-info {
            padding: 32px;
        }

        .case-category {
            font-size: 11px;
            font-weight: 700;
            color: var(--color-text-muted);
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .case-title {
            font-size: 18px;
            margin-bottom: 12px;
        }

        .case-desc {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        /* Testimonials */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-size: 14px;
            color: var(--color-text-muted);
            font-style: italic;
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .comment-author {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .comment-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 14px;
        }

        .comment-meta h5 {
            font-size: 14px;
            font-weight: 700;
        }

        .comment-meta span {
            font-size: 11px;
            color: var(--color-text-muted);
        }

        /* FAQ (Fold Panels) */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
        }

        .faq-trigger {
            width: 100%;
            background: transparent;
            border: none;
            padding: 24px 0;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-trigger::after {
            content: "+";
            font-size: 20px;
            transition: var(--transition);
        }

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

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
        }

        .faq-content p {
            padding-bottom: 24px;
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.6;
        }

        /* Form & Contact (智能需求匹配) */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: start;
        }

        .form-container {
            background: #ffffff;
            border: 1px solid var(--color-border-dark);
            padding: 48px;
        }

        .form-group {
            margin-bottom: 24px;
        }

        .form-group label {
            display: block;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--color-border);
            background: var(--color-bg);
            font-size: 14px;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--color-border-dark);
            background: #ffffff;
        }

        .contact-info-area {
            padding-top: 20px;
        }

        .contact-channels {
            margin-bottom: 40px;
        }

        .channel-item {
            margin-bottom: 24px;
        }

        .channel-label {
            font-size: 12px;
            font-weight: 700;
            color: var(--color-text-muted);
            margin-bottom: 4px;
        }

        .channel-val {
            font-size: 18px;
            font-weight: 700;
        }

        .qr-codes {
            display: flex;
            gap: 32px;
            margin-top: 40px;
        }

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

        .qr-item img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--color-border);
            padding: 8px;
            background: #ffffff;
            margin-bottom: 8px;
        }

        .qr-item span {
            font-size: 12px;
            color: var(--color-text-muted);
            display: block;
        }

        /* Articles & Knowledge base */
        .articles-list {
            margin-top: 40px;
            border-top: 1px solid var(--color-border);
        }

        .article-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .article-item:hover {
            padding-left: 8px;
        }

        .article-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-main);
            text-decoration: none;
        }

        .article-meta {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        /* Footer */
        footer {
            background: #111111;
            color: #ffffff;
            padding: 80px 0 40px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-brand p {
            color: #888888;
            font-size: 14px;
            margin-top: 16px;
            max-width: 320px;
        }

        .footer-links h5 {
            font-size: 14px;
            margin-bottom: 24px;
            letter-spacing: 0.05em;
        }

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

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

        .footer-links ul li a {
            color: #888888;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid #222222;
            padding-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 12px;
            color: #666666;
        }

        .friend-links a {
            color: #666666;
            text-decoration: none;
            margin-right: 16px;
            transition: var(--transition);
        }

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

        /* Floating Contact Widget */
        .floating-widget {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .widget-item {
            width: 48px;
            height: 48px;
            background: #ffffff;
            border: 1px solid var(--color-border-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: var(--transition);
        }

        .widget-item:hover {
            background: var(--color-accent);
            color: #ffffff;
        }

        .widget-hover-panel {
            position: absolute;
            right: 56px;
            bottom: 0;
            background: #ffffff;
            border: 1px solid var(--color-border-dark);
            padding: 16px;
            display: none;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            text-align: center;
        }

        .widget-hover-panel img {
            width: 120px;
            height: 120px;
            display: block;
            margin-bottom: 8px;
        }

        .widget-hover-panel span {
            font-size: 12px;
            color: var(--color-text-main);
            white-space: nowrap;
        }

        .widget-item:hover .widget-hover-panel {
            display: block;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid, .steps-grid, .case-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
            .hero h1 {
                font-size: 40px;
            }
            .about-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .services-grid, .steps-grid, .case-grid, .comments-grid, .token-grid {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 1px solid var(--color-border);
                padding: 20px 24px;
                gap: 16px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .rating-summary {
                flex-direction: column;
                align-items: flex-start;
            }
        }