/* CSS Reset & Variables */
        :root {
            --primary: #ff5e97;       /* 糖果粉 */
            --secondary: #4facfe;     /* 糖果蓝 */
            --accent: #ffb300;        /* 糖果黄 */
            --success: #00d2fc;       /* 糖果绿 */
            --dark: #2d3748;          /* 深灰 */
            --light: #fdfbf7;         /* 暖白背景 */
            --white: #ffffff;
            --gradient-candy: linear-gradient(135deg, #ff5e97 0%, #ffb300 50%, #4facfe 100%);
            --shadow-candy: 0 10px 30px rgba(255, 94, 151, 0.15);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: var(--dark);
            position: relative;
        }

        .section-title span {
            background: var(--gradient-candy);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-subtitle {
            text-align: center;
            color: #718096;
            max-width: 600px;
            margin: 0 auto 50px;
            font-size: 1.1rem;
        }

        /* Buttons */
        .btn {
            display: inline-block;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--gradient-candy);
            color: var(--white);
            box-shadow: var(--shadow-candy);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(255, 94, 151, 0.3);
        }

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

        .btn-outline:hover {
            background: var(--secondary);
            color: var(--white);
            transform: translateY(-3px);
        }

        /* Header Navigation */
        header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            padding: 15px 0;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

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

        .nav-links {
            display: flex;
            list-style: none;
            gap: 20px;
            align-items: center;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: var(--transition);
            font-size: 0.95rem;
        }

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

        .nav-btn {
            background: var(--gradient-candy);
            color: var(--white) !important;
            padding: 8px 20px;
            border-radius: 20px;
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
        }

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

        /* Hero Section (No Image) */
        .hero {
            background: radial-gradient(circle at 10% 20%, rgba(255, 94, 151, 0.05) 0%, rgba(0, 210, 252, 0.05) 90%);
            padding: 120px 0 80px;
            text-align: center;
            overflow: hidden;
        }

        .hero-badge {
            background: rgba(255, 94, 151, 0.1);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 25px;
            color: var(--dark);
        }

        .hero h1 span {
            background: var(--gradient-candy);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.2rem;
            color: #4a5568;
            max-width: 800px;
            margin: 0 auto 40px;
        }

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

        /* Floating Bubble Animation for Hero */
        .hero-bubbles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 0;
        }

        .bubble {
            position: absolute;
            background: var(--gradient-candy);
            border-radius: 50%;
            opacity: 0.15;
            animation: floatBubble 12s infinite ease-in-out;
        }

        @keyframes floatBubble {
            0% { transform: translateY(0) scale(1); }
            50% { transform: translateY(-40px) scale(1.1); }
            100% { transform: translateY(0) scale(1); }
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
            position: relative;
            z-index: 2;
        }

        .stat-card {
            background: var(--white);
            border-radius: 16px;
            padding: 30px 20px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            border: 1px solid rgba(255, 94, 151, 0.1);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-candy);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--gradient-candy);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }

        .stat-label {
            color: #718096;
            font-weight: 500;
        }

        /* Services Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            border-radius: 20px;
            padding: 40px 30px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.02);
            transition: var(--transition);
            border-bottom: 4px solid transparent;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-candy);
            border-bottom-color: var(--primary);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h3 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        /* Model Badge Grid */
        .model-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }

        .model-badge {
            background: var(--white);
            border: 1px solid rgba(79, 172, 254, 0.2);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #4a5568;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

        .solution-card {
            background: var(--white);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            border: 1px solid rgba(0, 210, 252, 0.1);
        }

        .solution-header {
            background: var(--gradient-candy);
            color: var(--white);
            padding: 25px;
            text-align: center;
        }

        .solution-body {
            padding: 30px;
        }

        .solution-body ul {
            list-style: none;
        }

        .solution-body li {
            margin-bottom: 12px;
            position: relative;
            padding-left: 25px;
        }

        .solution-body li::before {
            content: "✓";
            color: var(--success);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* Network & Process styling */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
        }

        .step-card {
            text-align: center;
            padding: 30px 20px;
            background: var(--white);
            border-radius: 16px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            position: relative;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-candy);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 20px;
        }

        /* Evaluation Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--white);
            border-radius: 20px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.03);
            border: 1px solid rgba(255, 94, 151, 0.1);
        }

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

        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid #edf2f7;
        }

        th {
            background-color: rgba(79, 172, 254, 0.05);
            font-weight: 700;
        }

        .highlight-col {
            background-color: rgba(255, 94, 151, 0.02);
            font-weight: 600;
        }

        .star-rating {
            color: var(--accent);
            font-size: 1.2rem;
        }

        /* Case Section */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .case-item {
            background: var(--white);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .case-item:hover {
            transform: scale(1.02);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #f7fafc;
        }

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

        .case-info {
            padding: 20px;
        }

        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .testimonial-card {
            background: var(--white);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            border-top: 4px solid var(--secondary);
        }

        .testi-meta {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 20px;
        }

        .testi-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--gradient-candy);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        /* Forms */
        .form-section {
            background: linear-gradient(135deg, rgba(255, 94, 151, 0.02) 0%, rgba(79, 172, 254, 0.02) 100%);
            border-radius: 30px;
            padding: 50px 40px;
            border: 1px solid rgba(255, 94, 151, 0.1);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .form-inputs {
            background: var(--white);
            padding: 30px;
            border-radius: 20px;
            box-shadow: var(--shadow-candy);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #e2e8f0;
            border-radius: 8px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 94, 151, 0.15);
        }

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

        .faq-item {
            background: var(--white);
            border-radius: 12px;
            margin-bottom: 15px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.01);
            overflow: hidden;
            border: 1px solid rgba(79, 172, 254, 0.1);
        }

        .faq-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            user-select: none;
            transition: var(--transition);
        }

        .faq-header:hover {
            background-color: rgba(79, 172, 254, 0.02);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafbfe;
        }

        .faq-content {
            padding: 20px;
            border-top: 1px solid #edf2f7;
            color: #4a5568;
        }

        .faq-item.active .faq-body {
            max-height: 300px;
        }

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

        /* Article list */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .article-card {
            background: var(--white);
            border-radius: 16px;
            padding: 25px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.01);
            border-left: 5px solid var(--accent);
        }

        .article-card a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            margin-top: 15px;
        }

        /* Floating Contact Widget */
        .floating-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient-candy);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            cursor: pointer;
            text-decoration: none;
            position: relative;
        }

        .float-popover {
            position: absolute;
            right: 65px;
            bottom: 0;
            background: var(--white);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            display: none;
            width: 180px;
            text-align: center;
        }

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

        .float-popover img {
            width: 100%;
            border-radius: 8px;
            margin-top: 8px;
        }

        /* Footer */
        footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding: 60px 0 30px;
        }

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

        .footer-col h4 {
            color: var(--white);
            margin-bottom: 20px;
        }

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

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

        .footer-col a {
            color: #a0aec0;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-qr {
            width: 120px;
            border-radius: 8px;
            background: var(--white);
            padding: 5px;
        }

        .footer-bottom {
            border-top: 1px solid #2d3748;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        /* Responsive Styles */
        @media (max-width: 992px) {
            .menu-toggle {
                display: flex;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--white);
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                gap: 15px;
            }

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

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

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

        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2.2rem;
            }

            .hero-btn-group {
                flex-direction: column;
                align-items: center;
            }

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