:root {
            --primary: #e91e63;
            --primary-hover: #d81b60;
            --primary-dark: #c2185b;
            --primary-light: #fce4ec;
            --rose-bg: #fff5f7;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --card-bg: #ffffff;
            --border-color: #f3d5df;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(233, 30, 99, 0.06);
            --shadow-md: 0 8px 24px rgba(233, 30, 99, 0.1);
            --shadow-lg: 0 16px 32px rgba(233, 30, 99, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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;
            color: var(--text-main);
            background-color: var(--rose-bg);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            width: 100%;
        }

        /* 统一外层居中容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

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

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

        /* Header & Navigation */
        .header-site {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

        .ai-page-logo {
            max-height: 42px;
            width: auto;
            display: block;
        }

        .brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0; /* 严格按照需求设为 0 */
            list-style: none;
        }

        .nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
        }

        .nav-links li a:hover,
        .nav-links li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            cursor: pointer;
            border: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(233, 30, 99, 0.3);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(233, 30, 99, 0.4);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* Hero Section (No images allowed) */
        .hero-section {
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #fff0f5 0%, #fff 50%, #ffe4ec 100%);
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.875rem;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 24px;
            border: 1px solid rgba(233, 30, 99, 0.2);
        }

        .hero-title {
            font-size: 2.5rem;
            line-height: 1.25;
            font-weight: 900;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-title span {
            color: var(--primary);
            background: linear-gradient(45deg, #e91e63, #ff4081);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 36px;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: var(--card-bg);
            padding: 24px 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 4px;
        }

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

        /* Common Section Styling */
        .section-block {
            padding: 80px 0;
        }

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

        .section-tag {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 650px;
            margin: 0 auto;
        }

        /* Card Grid Systems */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .feature-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .feature-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .feature-desc {
            font-size: 0.95rem;
            color: var(--text-muted);
            flex-grow: 1;
        }

        /* Promo / Platform Banner Area */
        .platform-intro-box {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .platform-text h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .platform-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .platform-list {
            list-style: none;
            margin-bottom: 24px;
        }

        .platform-list li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--text-main);
        }

        .platform-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        .img-wrapper {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

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

        /* Comparison Table */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 650px;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: #fff0f5;
            color: var(--text-main);
            font-weight: 700;
        }

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

        .highlight-col {
            background-color: rgba(233, 30, 99, 0.04);
            font-weight: 700;
            color: var(--primary-dark);
        }

        .score-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: #fff0f5;
            padding: 8px 16px;
            border-radius: 50px;
            border: 1px solid var(--primary);
            font-weight: 800;
            color: var(--primary);
            margin-top: 12px;
        }

        /* FAQ Accordion */
        .faq-grid {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--text-main);
            user-select: none;
        }

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

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            display: none;
            border-top: 1px dashed var(--border-color);
            padding-top: 16px;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-icon {
            font-weight: bold;
            color: var(--primary);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* Reviews Grid */
        .review-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

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

        .avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .author-info h4 {
            font-size: 0.95rem;
            color: var(--text-main);
        }

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

        /* Contact & Form */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            background: var(--card-bg);
            padding: 40px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .contact-info h3 {
            font-size: 1.6rem;
            margin-bottom: 16px;
        }

        .contact-detail-item {
            margin-bottom: 16px;
            font-size: 0.95rem;

        }

        .contact-detail-item strong {
            color: var(--primary-dark);
            display: block;
            margin-bottom: 4px;
        }

        .qr-box {
            margin-top: 20px;
            padding: 16px;
            background: var(--rose-bg);
            border-radius: var(--radius-md);
            display: inline-block;
            text-align: center;
            border: 1px solid var(--border-color);
        }

        .qr-box img {
            width: 140px;
            height: 140px;
            display: block;
            margin: 0 auto 8px;
            border-radius: var(--radius-sm);
        }

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

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
            background-color: #fafafa;
        }

        .form-control:focus {
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.1);
        }

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

        /* Model Tags Cloud */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .tag-chip {
            padding: 8px 16px;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .tag-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* Footer */
        .footer-site {
            background-color: #ffffff;
            border-top: 1px solid var(--border-color);
            padding: 50px 0 20px;
            margin-top: 60px;
            color: var(--text-main);
        }

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

        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 12px;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .friendship-links {
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            margin-bottom: 20px;
        }

        .friendship-links h5 {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .friendship-links-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .friendship-links-flex a {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(0,0,0,0.05);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Floating Contact */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            background: var(--primary);
            color: #ffffff;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 20px rgba(233, 30, 99, 0.4);
            cursor: pointer;
            transition: var(--transition);
        }

        .floating-kefu:hover {
            transform: scale(1.1);
        }

        /* Responsive Styles */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2rem;
            }
            .platform-intro-box {
                grid-template-columns: 1fr;
            }
            .contact-container {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links li a {
                display: block;
                padding: 12px;
            }
            .header-actions {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-section {
                padding: 50px 0 40px;
            }
        }