/* CSS Reset & Variables */
        :root {
            --primary: #ff5e97; /* 缤纷粉 */
            --primary-light: #fff0f5;
            --secondary: #00d2fc; /* 糖果蓝 */
            --accent: #ffb800; /* 芒果黄 */
            --success: #20e3b2; /* 薄荷绿 */
            --dark: #2c3e50;
            --light-bg: #fcfdff;
            --card-shadow: 0 12px 30px rgba(255, 94, 151, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

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

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

        /* Ambient background decorations */
        .ambient-blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.15;
            pointer-events: none;
        }
        .blob-1 { top: 10%; left: 5%; width: 300px; height: 300px; background: var(--primary); }
        .blob-2 { top: 40%; right: 5%; width: 400px; height: 400px; background: var(--secondary); }
        .blob-3 { bottom: 10%; left: 10%; width: 350px; height: 350px; background: var(--success); }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            color: var(--dark);
        }
        h2 {
            font-size: 2rem;
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 0.75rem auto 0;
            border-radius: 2px;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        /* Custom Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.8rem 1.8rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #ff769f 100%);
            color: #ffffff;
            box-shadow: 0 8px 20px rgba(255, 94, 151, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(255, 94, 151, 0.35);
        }
        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary) 0%, #33e1ff 100%);
            color: #ffffff;
            box-shadow: 0 8px 20px rgba(0, 210, 252, 0.25);
        }
        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(0, 210, 252, 0.35);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
            border-bottom: 1px solid rgba(255, 94, 151, 0.1);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-area .ai-page-logo {
            max-height: 45px;
            object-fit: contain;
        }
        .logo-area .brand-name {
            font-size: 1.3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }
        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--dark);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* Hero Section */
        .hero {
            padding: 160px 0 80px;
            text-align: center;
            position: relative;
        }
        .hero-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 94, 151, 0.2);
        }
        .hero h1 {
            font-size: 3rem;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 50%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--dark);
            max-width: 800px;
            margin: 0 auto 40px;
        }
        .hero-ctas {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        /* Metric/Data cards */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 60px;
        }
        .metric-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 30px 20px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255,94,151,0.05);
            transition: var(--transition);
        }
        .metric-card:hover {
            transform: translateY(-5px);
        }
        .metric-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: var(--dark);
            font-weight: 500;
        }

        /* Generic Section Design */
        section {
            padding: 80px 0;
            position: relative;
        }
        .bg-white {
            background: #ffffff;
        }
        .bg-light {
            background: #f6f8fb;
        }

        /* Grid layouts */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 40px;
            align-items: center;
        }

        /* Cards */
        .card {
            background: #ffffff;
            border-radius: 20px;
            padding: 35px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255,94,151,0.05);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 16px 36px rgba(255, 94, 151, 0.12);
        }
        .card-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin-bottom: 25px;
        }
        .icon-primary { background: var(--primary-light); color: var(--primary); }
        .icon-secondary { background: #e0faff; color: var(--secondary); }
        .icon-accent { background: #fff8e0; color: var(--accent); }

        /* Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }
        .tag-item {
            background: #ffffff;
            border: 1px solid rgba(0, 210, 252, 0.2);
            color: var(--dark);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag-item:hover {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: #ffffff;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* Step Timeline */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            position: relative;
        }
        .step-item {
            background: #ffffff;
            padding: 30px;
            border-radius: 20px;
            border: 1px solid rgba(255,94,151,0.05);
            box-shadow: var(--card-shadow);
            text-align: center;
            position: relative;
        }
        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 20px;
            box-shadow: 0 4px 10px rgba(255, 94, 151, 0.3);
        }

        /* Image Display Section (Cases) */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .case-card {
            background: #ffffff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-8px);
        }
        .case-image-wrapper {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #eee;
        }
        .case-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover .case-image-wrapper img {
            transform: scale(1.08);
        }
        .case-content {
            padding: 20px;
        }
        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.8rem;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 6px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        /* Comparison Table */
        .table-responsive {
            overflow-x: auto;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            background: #ffffff;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid #f1f3f5;
        }
        th {
            background: #f8fafc;
            font-weight: 600;
        }
        tr:last-child td {
            border-bottom: none;
        }
        .highlight-row {
            background: rgba(255, 94, 151, 0.02);
        }
        .score-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #ffe8ee;
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 700;
        }

        /* Form styling */
        .form-card {
            background: #ffffff;
            border-radius: 24px;
            padding: 40px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255,94,151,0.05);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 0.95rem;
        }
        .form-control {
            width: 100%;
            padding: 12px 18px;
            border: 2px solid #e1e8ed;
            border-radius: 12px;
            outline: none;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 8px rgba(255, 94, 151, 0.15);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #ffffff;
            border-radius: 16px;
            margin-bottom: 15px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255,94,151,0.05);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-header {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            user-select: none;
        }
        .faq-icon {
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #fcfdff;
        }
        .faq-content {
            padding: 20px;
            border-top: 1px solid #f1f3f5;
            color: var(--dark);
        }
        .faq-item.active .faq-body {
            max-height: 250px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* Testimonials */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }
        .review-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255,94,151,0.05);
            position: relative;
        }
        .review-text {
            font-style: italic;
            margin-bottom: 20px;
            color: var(--dark);
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .user-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }
        .user-info p {
            font-size: 0.8rem;
            color: var(--dark);
            opacity: 0.8;
        }

        /* News Section */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .news-card {
            background: white;
            border-radius: 20px;
            padding: 25px;
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .news-link {
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 15px;
            display: block;
            transition: var(--transition);
        }
        .news-link:hover {
            color: var(--primary);
        }

        /* Footer */
        .footer {
            background: #1f2937;
            color: #e5e7eb;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            margin-bottom: 20px;
        }
        .footer-logo img {
            max-height: 40px;
            
        }
        .footer-title {
            font-size: 1.1rem;
            color: #ffffff;
            margin-bottom: 20px;
            position: relative;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            transition: var(--transition);
            color: #9ca3af;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-qrcode {
            max-width: 120px;
            border-radius: 10px;
            margin-top: 10px;
        }
        .footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 30px;
            text-align: center;
            font-size: 0.9rem;
            color: #9ca3af;
        }
        .friend-links-wrap {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #374151;
        }
        .friend-links-wrap a {
            display: inline-block;
            margin: 5px 15px 5px 0;
            color: #9ca3af;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .friend-links-wrap a:hover {
            color: var(--secondary);
        }

        /* Floating customer service */
        .floating-service {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .float-btn {
            width: 55px;
            height: 55px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }
        .float-btn:hover {
            transform: translateY(-3px);
        }
        .float-btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
        }
        .qr-popover {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: white;
            padding: 15px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }
        .qr-popover img {
            width: 100%;
            border-radius: 8px;
            margin-bottom: 8px;
        }
        .qr-popover p {
            font-size: 0.8rem;
            color: var(--dark);
            font-weight: 600;
        }
        .float-btn:hover .qr-popover {
            display: block;
        }

        /* CSS Utilities */
        .text-center { text-align: center; }
        .text-primary { color: var(--primary); }
        .mb-2 { margin-bottom: 0.5rem; }
        .mb-4 { margin-bottom: 1rem; }

        /* Responsive Design */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                border-bottom: 1px solid rgba(255, 94, 151, 0.1);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .grid-2, .grid-3 {
                grid-template-columns: 1fr;
            }
            .nav-cta {
                display: none;
            }
        }