/* CSS Reset & Variables */
        :root {
            --primary: #ff2d55; /* 桃红艳丽风主色 */
            --primary-hover: #e02047;
            --primary-light: #fff0f3;
            --secondary: #00bcd4;
            --dark: #1f1f2e;
            --light-gray: #f8f9fa;
            --border-color: rgba(255, 45, 85, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: #fffcfc;
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        .section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-alt {
            background-color: var(--light-gray);
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .text-center { text-align: center; }
        
        .section-title {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 700;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 40px;
            height: 4px;
            background: var(--primary);
            margin: 8px auto 0 auto;
            border-radius: 2px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: #666;
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Header & Navigation */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

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

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

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

        .nav-link {
            text-decoration: none;
            color: var(--dark);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }

        .nav-link:hover {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }

        .nav-btn {
            background: var(--primary);
            color: white;
            padding: 8px 18px;
            border-radius: 20px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 10px rgba(255, 45, 85, 0.2);
        }

        .nav-btn:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

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

        /* Hero Section (No images) */
        .hero {
            padding: 160px 0 100px 0;
            background: linear-gradient(135deg, #fff0f3 0%, #fff9fa 50%, #fcedf0 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,45,85,0.08) 0%, rgba(255,255,255,0) 70%);
            top: -50px;
            right: -50px;
            border-radius: 50%;
        }

        .hero::after {
            content: '';
            position: absolute;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(0,188,212,0.05) 0%, rgba(255,255,255,0) 70%);
            bottom: -50px;
            left: -50px;
            border-radius: 50%;
        }

        .hero-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            background: rgba(255, 45, 85, 0.08);
            color: var(--primary);
            padding: 6px 15px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 45, 85, 0.15);
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 25px;
            font-weight: 800;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #555;
            margin-bottom: 35px;
            line-height: 1.7;
        }

        .hero-btns {
            display: flex;
            gap: 15px;
            justify-content: center;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .btn-main {
            background: var(--primary);
            color: white;
            padding: 14px 30px;
            border-radius: 30px;
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 700;
            box-shadow: 0 8px 20px rgba(255, 45, 85, 0.3);
            transition: var(--transition);
        }

        .btn-main:hover {
            background: var(--primary-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 45, 85, 0.4);
        }

        .btn-sub {
            background: white;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 12px 28px;
            border-radius: 30px;
            text-decoration: none;
            font-size: 1.1rem;
            font-weight: 700;
            transition: var(--transition);
        }

        .btn-sub:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .stat-card {
            background: white;
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(255, 45, 85, 0.04);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(255, 45, 85, 0.08);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: #666;
            font-weight: 500;
        }

        /* Cards Grid Layouts */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .card {
            background: white;
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(255, 45, 85, 0.06);
        }

        .card-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .card-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .card-desc {
            font-size: 0.95rem;
            color: #666;
            line-height: 1.6;
        }

        /* Process Steps */
        .process-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            background: white;
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .step-num {
            width: 45px;
            height: 45px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 15px auto;
            box-shadow: 0 4px 10px rgba(255, 45, 85, 0.2);
        }

        /* Evaluation Table */
        .table-responsive {
            overflow-x: auto;
            margin: 30px 0;
            background: white;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
        }

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

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

        th {
            background-color: var(--primary-light);
            color: var(--dark);
            font-weight: 700;
        }

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

        .badge-star {
            color: #ffc107;
            font-size: 1.1rem;
        }

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

        .faq-item {
            background: white;
            margin-bottom: 15px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 18px 24px;
            background: white;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-title {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--dark);
        }

        .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;
            background: #fffdfd;
        }

        .faq-content {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 45, 85, 0.06);
            color: #555;
            font-size: 0.95rem;
            line-height: 1.6;
        }

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

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

        /* Comments Grid */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .comment-card {
            background: white;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-style: italic;
            color: #555;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .user-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--dark);
        }

        .user-info p {
            font-size: 0.8rem;
            color: #888;
        }

        /* Images and Gallery style */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .case-item {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            display: flex;
            flex-direction: column;
        }

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

        .case-img-container.square {
            aspect-ratio: 1/1;
        }

        .ai-page-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-item:hover .ai-page-image {
            transform: scale(1.05);
        }

        .case-info {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        /* Articles & tags */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .article-card {
            background: white;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 25px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(255, 45, 85, 0.05);
        }

        .article-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            text-decoration: none;
            transition: var(--transition);
            display: block;
        }

        .article-title:hover {
            color: var(--primary);
        }

        .article-meta {
            font-size: 0.85rem;
            color: #888;
            margin-bottom: 15px;
        }

        .article-link {
            align-self: flex-start;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 25px;
            justify-content: center;
        }

        .tag-item {
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            text-decoration: none;
            transition: var(--transition);
        }

        .tag-item:hover {
            background: var(--primary);
            color: white;
        }

        /* Form styling */
        .form-wrapper {
            max-width: 650px;
            margin: 0 auto;
            background: white;
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 8px 30px rgba(255, 45, 85, 0.05);
        }

        .form-group {
            margin-bottom: 22px;
        }

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
            background-color: #fffdfd;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.15);
        }

        .form-submit-btn {
            width: 100%;
            background: var(--primary);
            color: white;
            border: none;
            padding: 14px;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 6px 15px rgba(255, 45, 85, 0.2);
        }

        .form-submit-btn:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }

        /* Contact Box styling */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            margin-top: 30px;
        }

        .contact-info-block {
            background: white;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .contact-icon {
            width: 45px;
            height: 45px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: bold;
        }

        .contact-details h5 {
            font-size: 0.85rem;
            color: #888;
            text-transform: uppercase;
        }

        .contact-details p {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
        }

        .qrcode-box {
            text-align: center;
            margin-top: 15px;
            padding: 15px;
            border: 1px dashed var(--primary);
            border-radius: 10px;
            background-color: var(--primary-light);
        }

        .qrcode-box img {
            width: 130px;
            height: 130px;
            margin-bottom: 8px;
            border-radius: 4px;
        }

        /* Footer styling */
        footer {
            background-color: #11111b;
            color: #a5a5b1;
            padding: 60px 0 30px 0;
            border-top: 3px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .footer-title {
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a, .footer-links p {
            color: #a5a5b1;
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }

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

        .friendship-links {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 25px;
            margin-bottom: 25px;
        }

        .friendship-links p {
            font-size: 0.9rem;
            margin-bottom: 10px;
            color: white;
        }

        .friendship-links a {
            color: #a5a5b1;
            text-decoration: none;
            margin-right: 15px;
            font-size: 0.85rem;
            display: inline-block;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            flex-wrap: wrap;
            gap: 15px;
        }

        .ai-page-home-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
        }

        /* Floating Sidebar */
        .floating-sidebar {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .float-btn:hover {
            background: var(--primary);
            color: white;
        }

        .float-btn svg {
            width: 22px;
            height: 22px;
            fill: currentColor;
        }

        .float-tooltip {
            position: absolute;
            right: 60px;
            background: white;
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: none;
            width: 180px;
            text-align: center;
            color: var(--dark);
        }

        .float-tooltip img {
            width: 120px;
            height: 120px;
            margin-bottom: 5px;
        }

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

        /* Animation utilities */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .comments-grid {
                grid-template-columns: 1fr 1fr;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
            }

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

            .nav-toggle {
                display: flex;
            }

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

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

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

            .process-steps {
                flex-direction: column;
            }
        }