/* CSS Reset & Variables */
        :root {
            --bg-base: #06040a;
            --bg-surface: rgba(18, 12, 28, 0.85);
            --bg-card: rgba(30, 20, 48, 0.45);
            --color-primary: #ff007f;     /* 霓虹粉 */
            --color-secondary: #8a2be2;   /* 霓虹紫 */
            --color-accent: #00f0ff;      /* 赛博青 */
            --text-main: #f3f1f6;
            --text-muted: #a19bb0;
            --border-neon: rgba(255, 0, 127, 0.25);
            --border-purple: rgba(138, 43, 226, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

        * {
            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;
            background-color: var(--bg-base);
            color: var(--text-main);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(138, 43, 226, 0.08) 0%, transparent 40%);
            background-attachment: fixed;
        }

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

        img {
            max-width: 100%;
            height: auto;
            vertical-align: middle;
        }

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

        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            position: relative;
        }

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

        .section-header h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Buttons styling */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 5px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: #fff;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 0, 127, 0.6);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--color-accent);
        }

        .btn-accent {
            background: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
        }

        .btn-accent:hover {
            background: var(--color-accent);
            color: #000;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
        }

        /* Header / Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(6, 4, 10, 0.85);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 0, 127, 0.15);
        }

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

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

        .ai-page-logo {
            height: 40px;
            object-fit: contain;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 1px;
            background: linear-gradient(to right, #fff, var(--text-muted));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-menu a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .nav-menu a:hover, .nav-menu a.active {
            color: var(--color-accent);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
        }

        .nav-btn {
            font-size: 0.85rem;
            padding: 8px 16px;
        }

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

        .nav-toggle span {
            display: block;
            width: 25px;
            height: 2px;
            background: #fff;
            transition: var(--transition);
        }

        /* Hero Section (No images allowed) */
        .hero {
            padding: 140px 0 100px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: calc(90vh - 70px);
            text-align: center;
            position: relative;
        }

        /* Grid Background effect */
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                linear-gradient(rgba(255, 0, 127, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 0, 127, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            background-position: center top;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 30px;
            background: rgba(255, 0, 127, 0.1);
            border: 1px solid rgba(255, 0, 127, 0.3);
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 25px;
            letter-spacing: 1px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(255, 0, 127, 0.4); }
            70% { box-shadow: 0 0 0 10px rgba(255, 0, 127, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 0, 127, 0); }
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--color-primary) 70%, var(--color-accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 35px;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

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

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

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            padding: 20px;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--color-primary);
            box-shadow: 0 5px 15px rgba(255, 0, 127, 0.15);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 5px;
            font-family: monospace;
        }

        .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-5px);
            border-color: var(--color-primary);
            box-shadow: 0 8px 25px rgba(138, 43, 226, 0.2);
        }

        .card:hover::before {
            opacity: 1;
        }

        .card-icon {
            font-size: 2.2rem;
            color: var(--color-primary);
            margin-bottom: 20px;
            display: inline-block;
        }

        .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: #fff;
        }

        .card-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Custom Flow Section */
        .flow-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .flow-step {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            padding: 25px;
            border-radius: 8px;
            position: relative;
            z-index: 2;
        }

        .flow-num {
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(255, 0, 127, 0.15);
            line-height: 1;
        }

        .flow-title {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            margin-top: 15px;
        }

        .flow-desc {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* Comparison Table */
        .table-responsive {
            overflow-x: auto;
            border-radius: 8px;
            border: 1px solid var(--border-purple);
            background: var(--bg-surface);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.9rem;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        th {
            background: rgba(30, 20, 48, 0.85);
            font-weight: 600;
            color: #fff;
        }

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

        .recommended-row {
            background: rgba(255, 0, 127, 0.06);
        }

        .badge-score {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.8rem;
        }

        /* Cases Section */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .case-item {
            border-radius: 8px;
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            transition: var(--transition);
        }

        .case-item:hover {
            transform: scale(1.02);
            border-color: var(--color-accent);
        }

        .case-img-wrap {
            width: 100%;
            height: 180px;
            overflow: hidden;
            background: #110c1c;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-item:hover .case-img-wrap img {
            transform: scale(1.1);
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            color: var(--color-accent);
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: #fff;
        }

        .case-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAQ Section (Accordion) */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            border-radius: 6px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            font-size: 0.95rem;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.2rem;
            color: var(--color-primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: rgba(6, 4, 10, 0.4);
        }

        .faq-answer p {
            padding: 20px;
            font-size: 0.88rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
        }

        /* Reviews Grid */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 8px;
            padding: 25px;
        }

        .review-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .reviewer-info h4 {
            font-size: 0.9rem;
            color: #fff;
        }

        .reviewer-info span {
            font-size: 0.75rem;
            color: var(--color-accent);
        }

        .rating {
            color: #ffb703;
            font-size: 0.8rem;
        }

        .review-body {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Form Area */
        .form-box {
            max-width: 650px;
            margin: 0 auto;
            background: var(--bg-surface);
            border: 1px solid var(--border-neon);
            border-radius: 8px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .form-control {
            background: rgba(6, 4, 10, 0.7);
            border: 1px solid var(--border-purple);
            border-radius: 4px;
            padding: 12px;
            color: #fff;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--color-primary);
            outline: none;
            box-shadow: 0 0 8px rgba(255, 0, 127, 0.3);
        }

        /* Tag Cloud & Networks */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .tag-item {
            background: rgba(138, 43, 226, 0.12);
            border: 1px solid var(--border-purple);
            color: var(--text-main);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--color-primary);
            background: rgba(255, 0, 127, 0.15);
            transform: scale(1.05);
        }

        /* News Section */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-purple);
            padding: 20px;
            border-radius: 6px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-card h4 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .news-card .news-link {
            font-size: 0.8rem;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 15px;
        }

        /* Footer */
        footer {
            background: #040206;
            padding: 60px 0 20px 0;
            border-top: 1px solid rgba(255, 0, 127, 0.15);
            font-size: 0.85rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--color-primary);
        }

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

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

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

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

        .footer-contact p {
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .qr-wrap {
            display: flex;
            gap: 15px;
            margin-top: 15px;
            align-items: center;
        }

        .qr-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 8px;
            border-radius: 6px;
            text-align: center;
            width: 100px;
        }

        .qr-card img {
            width: 100%;
            height: auto;
            border-radius: 4px;
        }

        .qr-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-top: 4px;
            display: block;
        }

        .friend-links {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
        }

        .friend-links a {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

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

        .footer-bottom {
            text-align: center;
            color: var(--text-muted);
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.75rem;
        }

        /* Float Panel */
        .float-panel {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            background: var(--bg-surface);
            border: 1px solid var(--border-neon);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(0,0,0,0.5);
            color: #fff;
            font-size: 1.2rem;
            position: relative;
        }

        .float-btn:hover {
            background: var(--color-primary);
            box-shadow: 0 0 15px var(--color-primary);
        }

        .float-qr-hover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--bg-surface);
            border: 1px solid var(--border-neon);
            padding: 12px;
            border-radius: 8px;
            display: none;
            width: 140px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.6);
        }

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

        /* Interactive tab styling */
        .tab-nav {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 30px;
        }

        .tab-btn {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background: rgba(255, 0, 127, 0.15);
            border-color: var(--color-primary);
            color: #fff;
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-gallery {
                grid-template-columns: repeat(2, 1fr);
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(6, 4, 10, 0.95);
                border-bottom: 1px solid var(--border-neon);
                padding: 20px;
                gap: 15px;
            }

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

            .nav-toggle {
                display: flex;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 0.95rem;
            }

            .flow-container, .stats-grid, .case-gallery, .reviews-grid, .footer-grid {
                grid-template-columns: 1fr;
            }

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

            .form-group-full {
                grid-column: span 1;
            }

            .form-box {
                padding: 20px;
            }
        }