:root {
            --primary: #00c7be;
            --primary-dark: #00a89c;
            --secondary: #5e5ce6;
            --accent: #30d158;
            --text-dark: #000000;
            --text-gray: #636366;
            --text-light: rgba(255,255,255,0.7);
            --text-muted: rgba(255,255,255,0.5);
            --bg-primary: #000000;
            --bg-secondary: #1c1c1e;
            --bg-tertiary: #2c2c2e;
            --glass: rgba(255,255,255,0.08);
            --glass-border: rgba(255,255,255,0.12);
            --radius: 16px;
            --radius-lg: 24px;
        }

        [data-theme="light"] {
            --text-dark: #1a1a1a;
            --text-light: rgba(0,0,0,0.7);
            --text-muted: rgba(0,0,0,0.5);
            --bg-primary: #f5f7fa;
            --bg-secondary: #ffffff;
            --bg-tertiary: #e8eaed;
            --glass: rgba(255,255,255,0.85);
            --glass-border: rgba(0,0,0,0.1);
        }

        [data-theme="light"] body {
            color: #1a1a1a;
        }

        [data-theme="light"] .hero-text h1,
        [data-theme="light"] .section-header h2,
        [data-theme="light"] .advantages-text h2,
        [data-theme="light"] .demo-text h2,
        [data-theme="light"] .contact h2,
        [data-theme="light"] .cta-section h2 {
            background: linear-gradient(135deg, #000 0%, #333 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        [data-theme="light"] .nav-links a,
        [data-theme="light"] .feature-card h3,
        [data-theme="light"] .advantage-item h4,
        [data-theme="light"] .scenario-card h4,
        [data-theme="light"] .pricing-name,
        [data-theme="light"] .footer-col h4,
        [data-theme="light"] .logo {
            color: #1a1a1a;
        }

        [data-theme="light"] .hero-text p,
        [data-theme="light"] .section-header p,
        [data-theme="light"] .advantages-text > p,
        [data-theme="light"] .demo-text > p,
        [data-theme="light"] .contact > p,
        [data-theme="light"] .cta-section p,
        [data-theme="light"] .feature-card p,
        [data-theme="light"] .advantage-item p,
        [data-theme="light"] .scenario-card p,
        [data-theme="light"] .stat-label,
        [data-theme="light"] .pricing-desc,
        [data-theme="light"] .pricing-features li,
        [data-theme="light"] .trust-item,
        [data-theme="light"] .footer-brand p,
        [data-theme="light"] .footer-col a,
        [data-theme="light"] .footer-bottom {
            color: rgba(0,0,0,0.6);
        }

        [data-theme="light"] .demo-chat-header span:first-child {
            color: #000;
        }

        [data-theme="light"] .demo-chat-header {
            background: rgba(0,0,0,0.03);
        }

        [data-theme="light"] .demo-input {
            background: rgba(0,0,0,0.04);
            border-color: rgba(0,0,0,0.1);
            color: #000;
        }

        [data-theme="light"] .demo-input::placeholder {
            color: rgba(0,0,0,0.4);
        }

        [data-theme="light"] .demo-bubble {
            background: rgba(0,0,0,0.06);
            color: #1a1a1a;
        }

        [data-theme="light"] .demo-msg.user .demo-bubble {
            color: #000;
        }

        [data-theme="light"] .demo-quick-btn {
            background: rgba(0,199,190,0.1);
            border-color: rgba(0,199,190,0.2);
            color: #00a89c;
        }

        [data-theme="light"] .demo-chat-header span:last-child {
            color: #00a89c;
        }

        [data-theme="light"] .chat-bubble {
            background: rgba(0,0,0,0.06);
            color: #1a1a1a;
        }

        [data-theme="light"] .chat-message.user .chat-bubble {
            color: #000;
        }

        [data-theme="light"] .chat-typing {
            background: rgba(0,0,0,0.06);
        }

        [data-theme="light"] .chat-typing span {
            background: rgba(0,0,0,0.3);
        }

        [data-theme="light"] .demo-chat-body

        [data-theme="light"] .demo-feature {
            color: rgba(0,0,0,0.7);
        }

        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            color: white;
            line-height: 1.6;
            background: var(--bg-primary);
            overflow-x: hidden;
            transition: background 0.4s, color 0.4s;
        }

        /* iOS Liquid Background - Enhanced */
        .bg-gradient {
            position: fixed;
            inset: 0;
            z-index: 0;
            overflow: hidden;
            pointer-events: none;
        }

        .liquid-canvas {
            position: absolute;
            inset: 0;
        }

        .liquid-layer {
            position: absolute;
            width: 100%;
            height: 100%;
            filter: blur(80px);
            opacity: 0.9;
        }

        .liquid-1 {
            background: radial-gradient(ellipse 100% 80% at 10% 5%, rgba(0,199,190,0.35) 0%, transparent 70%);
            animation: liquidFloat1 20s ease-in-out infinite;
        }

        .liquid-2 {
            background: radial-gradient(ellipse 90% 70% at 90% 10%, rgba(94,92,230,0.3) 0%, transparent 65%);
            animation: liquidFloat2 25s ease-in-out infinite;
        }

        .liquid-3 {
            background: radial-gradient(ellipse 80% 90% at 50% 95%, rgba(191,90,242,0.25) 0%, transparent 60%);
            animation: liquidFloat3 22s ease-in-out infinite;
        }

        .liquid-4 {
            background: radial-gradient(ellipse 100% 50% at 85% 85%, rgba(255,55,95,0.18) 0%, transparent 55%);
            animation: liquidFloat4 18s ease-in-out infinite;
        }

        .liquid-5 {
            background: radial-gradient(ellipse 70% 60% at 20% 60%, rgba(48,209,88,0.15) 0%, transparent 50%);
            animation: liquidFloat5 24s ease-in-out infinite;
        }

        /* Floating Orbs */
        .floating-orbs {
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            overflow: hidden;
        }

        .orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(60px);
            opacity: 0.4;
            animation: orbFloat 15s ease-in-out infinite;
        }

        .orb-1 {
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0,199,190,0.4) 0%, transparent 70%);
            top: 10%;
            left: -5%;
            animation-delay: 0s;
        }

        .orb-2 {
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(94,92,230,0.35) 0%, transparent 70%);
            top: 50%;
            right: -3%;
            animation-delay: -5s;
        }

        .orb-3 {
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(191,90,242,0.3) 0%, transparent 70%);
            bottom: 15%;
            left: 30%;
            animation-delay: -10s;
        }

        @keyframes orbFloat {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            25% { transform: translate(20px, -30px) rotate(5deg); }
            50% { transform: translate(-15px, 20px) rotate(-3deg); }
            75% { transform: translate(10px, 15px) rotate(2deg); }
        }

        @keyframes liquidFloat1 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(30px, -40px) scale(1.1); }
            66% { transform: translate(-20px, 20px) scale(0.95); }
        }

        @keyframes liquidFloat2 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(-40px, 30px) scale(1.05); }
            66% { transform: translate(20px, -30px) scale(1.1); }
        }

        @keyframes liquidFloat3 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(20px, 40px) scale(0.9); }
            66% { transform: translate(-30px, -20px) scale(1.05); }
        }

        @keyframes liquidFloat4 {
            0%, 100% { transform: translate(0, 0); }
            50% { transform: translate(40px, -20px); }
        }

        @keyframes liquidFloat5 {
            0%, 100% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(-25px, 25px) scale(1.08); }
        }

        /* Scroll Animations */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .animate-on-scroll.delay-1 { transition-delay: 0.1s; }
        .animate-on-scroll.delay-2 { transition-delay: 0.2s; }
        .animate-on-scroll.delay-3 { transition-delay: 0.3s; }
        .animate-on-scroll.delay-4 { transition-delay: 0.4s; }

        /* iOS Glass Effect - Enhanced */
        .ios-glass {
            background: var(--glass);
            backdrop-filter: blur(40px) saturate(180%);
            -webkit-backdrop-filter: blur(40px) saturate(180%);
            border: 1px solid var(--glass-border);
            box-shadow: 
                0 0 0 0.5px rgba(255, 255, 255, 0.05) inset,
                0 8px 40px rgba(0, 0, 0, 0.25),
                0 0 80px rgba(0,199,190,0.05) inset;
            transition: all 0.4s;
        }

        .ios-glass::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: inherit;
            background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
            pointer-events: none;
        }

        [data-theme="light"] .ios-glass {
            box-shadow: 
                0 0 0 0.5px rgba(0, 0, 0, 0.05) inset,
                0 8px 40px rgba(0, 0, 0, 0.1),
                0 0 80px rgba(0,199,190,0.03) inset;
        }

        /* Section Enhancements */
        .section {
            position: relative;
            padding: 100px 0;
        }

        .section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
        }

        .ios-glass-hover {
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .ios-glass-hover:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.2);
            transform: translateY(-4px);
        }

        [data-theme="light"] .ios-glass-hover:hover {
            background: rgba(255,255,255,0.9);
            box-shadow: 0 12px 40px rgba(0,0,0,0.12);
        }

        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            background: transparent;
        }

        [data-theme="light"] header {
            background: transparent;
        }

        header.scrolled {
            padding: 8px 0;
            background: rgba(0,0,0,0.75);
            backdrop-filter: blur(30px) saturate(180%);
            -webkit-backdrop-filter: blur(30px) saturate(180%);
            border-bottom: 1px solid var(--glass-border);
            box-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }

        [data-theme="light"] header.scrolled {
            background: rgba(255,255,255,0.85);
            box-shadow: 0 4px 30px rgba(0,0,0,0.08);
        }

        [data-theme="light"] header .logo {
            color: #000;
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: white;
            text-decoration: none;
            transition: all 0.3s;
        }

        .logo:hover {
            transform: scale(1.02);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 15px rgba(0,199,190,0.3);
            transition: all 0.3s;
        }

        .logo:hover .logo-icon {
            box-shadow: 0 6px 25px rgba(0,199,190,0.4);
            transform: rotate(-3deg);
        }

        .nav-links {
            display: flex;
            gap: 28px;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s;
            position: relative;
            padding: 4px 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s ease;
        }

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

        .nav-links a:hover::after {
            width: 100%;
        }

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

        .btn {
            padding: 10px 22px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            border: none;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black;
            box-shadow: 0 4px 20px rgba(0,199,190,0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 30px rgba(0,199,190,0.4);
        }

        .btn-outline {
            background: var(--glass);
            border: 1px solid var(--glass-border);
            color: white;
            backdrop-filter: blur(10px);
        }

        [data-theme="light"] .btn-outline {
            background: rgba(0,0,0,0.05);
            border-color: rgba(0,0,0,0.15);
            color: #1a1a1a;
        }

        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.25);
            transform: translateY(-2px);
        }

        [data-theme="light"] .btn-outline:hover {
            background: rgba(0,0,0,0.1);
            border-color: rgba(0,0,0,0.2);
        }

        /* Hero */
        .hero {
            padding: 160px 0 100px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 20%;
            left: 5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0,199,190,0.15) 0%, transparent 70%);
            filter: blur(60px);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 10%;
            right: 10%;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(94,92,230,0.12) 0%, transparent 70%);
            filter: blur(50px);
            pointer-events: none;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        [data-theme="light"] .hero-text h1 {
            background: linear-gradient(135deg, #000 0%, #333 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-text p {
            font-size: 16px;
            color: var(--text-muted);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-image {
            position: relative;
        }

        .chat-window {
            background: var(--bg-secondary);
            border-radius: 24px;
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05) inset;
            animation: float 6s ease-in-out infinite;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        [data-theme="light"] .chat-window {
            box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.05) inset;
        }

        .chat-window:hover {
            transform: translateY(-5px);
            box-shadow: 0 30px 80px rgba(0,0,0,0.6), 0 0 40px rgba(0,199,190,0.1);
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }

        .chat-header {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .chat-header-avatar {
            width: 36px;
            height: 36px;
            background: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .chat-header-info {
            color: white;
        }

        [data-theme="light"] .chat-header-status {
            color: rgba(0,0,0,0.6);
        }

        .chat-header-name {
            font-weight: 600;
            font-size: 15px;
        }

        .chat-header-status {
            font-size: 12px;
            opacity: 0.85;
        }

        .chat-body {
            padding: 20px;
            min-height: 280px;
        }

        .chat-message {
            display: flex;
            gap: 10px;
            margin-bottom: 14px;
            animation: msgIn 0.3s ease;
        }

        @keyframes msgIn {
            from { opacity: 0; transform: translateY(8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .chat-message.user {
            flex-direction: row-reverse;
        }

        .chat-avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
        }

        .chat-message.ai .chat-avatar {
            background: linear-gradient(135deg, var(--primary), var(--accent));
        }

        .chat-message.user .chat-avatar {
            background: linear-gradient(135deg, var(--secondary), #bf5af2);
        }

        .chat-bubble {
            padding: 10px 14px;
            border-radius: 16px;
            max-width: 220px;
            font-size: 14px;
        }

        .chat-message.ai .chat-bubble {
            background: rgba(255,255,255,0.1);
            color: white;
            border-bottom-left-radius: 4px;
        }

        [data-theme="light"] .chat-message.ai .chat-bubble {
            background: rgba(0,0,0,0.06);
            color: #1a1a1a;
        }

        .chat-message.user .chat-bubble {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black;
            border-bottom-right-radius: 4px;
        }

        .chat-typing {
            display: flex;
            gap: 4px;
            padding: 10px 14px;
            background: rgba(255,255,255,0.1);
            border-radius: 16px;
            width: fit-content;
        }

        .chat-typing span {
            width: 6px;
            height: 6px;
            background: rgba(255,255,255,0.5);
            border-radius: 50%;
            animation: typing 1.4s infinite;
        }

        .chat-typing span:nth-child(2) { animation-delay: 0.2s; }
        .chat-typing span:nth-child(3) { animation-delay: 0.4s; }

        @keyframes typing {
            0%, 60%, 100% { transform: translateY(0); }
            30% { transform: translateY(-6px); }
        }

        /* Section */
        .section {
            padding: 100px 0;
        }

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

        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 14px;
            color: white;
        }

        [data-theme="light"] .section-header h2 {
            color: #1a1a1a;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            padding: 32px 24px;
            border-radius: var(--radius-lg);
            text-align: center;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
            opacity: 0;
            transition: opacity 0.4s;
        }

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

        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            color: white;
        }

        [data-theme="light"] .feature-card h3 {
            color: #1a1a1a;
        }

        .feature-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, rgba(0,199,190,0.2), rgba(94,92,230,0.2));
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1) rotate(5deg);
            box-shadow: 0 8px 30px rgba(0,199,190,0.3);
            background: linear-gradient(135deg, rgba(0,199,190,0.35), rgba(94,92,230,0.35));
        }

        /* Advantages */
        .advantages {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .advantages-text h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
            color: white;
        }

        [data-theme="light"] .advantages-text h2 {
            color: #1a1a1a;
        }

        .advantages-text > p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 32px;
        }

        .advantage-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .advantage-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .advantage-check {
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: black;
            font-size: 12px;
            font-weight: bold;
            flex-shrink: 0;
        }

        .advantage-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
            color: white;
        }

        [data-theme="light"] .advantage-item h4 {
            color: #1a1a1a;
        }

        .advantage-item p {
            font-size: 13px;
            color: var(--text-muted);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .stat-card {
            padding: 28px 20px;
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .stat-number {
            font-size: 36px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Demo Section */
        .demo-section {
            border-radius: 40px;
            padding: 50px;
            position: relative;
            overflow: hidden;
        }

        .demo-section::before {
            content: '';
            position: absolute;
            top: -150px;
            right: -150px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
        }

        .demo-content {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .demo-text h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
            color: white;
        }

        [data-theme="light"] .demo-text h2 {
            color: #1a1a1a;
        }

        .demo-text > p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 24px;
        }

        .demo-features {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .demo-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light);
        }

        .demo-feature i {
            color: var(--primary);
        }

        .demo-chat {
            background: var(--bg-secondary);
            border-radius: 20px;
            border: 1px solid var(--glass-border);
            overflow: hidden;
            transition: all 0.4s;
        }

        .demo-chat-header {
            background: rgba(255,255,255,0.05);
            padding: 14px 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--glass-border);
        }

        [data-theme="light"] .demo-chat-header {
            background: rgba(0,0,0,0.03);
        }

        .demo-chat-header span:first-child {
            font-weight: 600;
            color: white;
        }

        [data-theme="light"] .demo-chat-header span:first-child {
            color: #000;
        }

        .demo-chat-header span:last-child {
            color: var(--primary);
            font-size: 13px;
        }

        .demo-chat-body {
            padding: 16px;
            max-height: 320px;
            overflow-y: auto;
        }

        .demo-messages {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 14px;
        }

        .demo-msg {
            display: flex;
            gap: 8px;
            align-items: flex-start;
        }

        .demo-msg.user {
            flex-direction: row-reverse;
        }

        .demo-avatar {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            flex-shrink: 0;
        }

        .demo-msg.ai .demo-avatar {
            background: linear-gradient(135deg, var(--primary), var(--accent));
        }

        .demo-msg.user .demo-avatar {
            background: linear-gradient(135deg, var(--secondary), #bf5af2);
        }

        .demo-bubble {
            max-width: 75%;
            padding: 8px 12px;
            border-radius: 14px;
            font-size: 13px;
            line-height: 1.4;
        }

        .demo-msg.ai .demo-bubble {
            background: rgba(255,255,255,0.1);
            color: white;
            border-bottom-left-radius: 3px;
        }

        [data-theme="light"] .demo-msg.ai .demo-bubble {
            background: rgba(0,0,0,0.06);
            color: #1a1a1a;
        }

        .demo-msg.user .demo-bubble {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black;
            border-bottom-right-radius: 3px;
        }

        .demo-quick {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 12px;
        }

        .demo-quick-btn {
            padding: 6px 12px;
            background: rgba(0,199,190,0.15);
            border: 1px solid rgba(0,199,190,0.3);
            border-radius: 16px;
            color: var(--primary);
            font-size: 12px;
            cursor: pointer;
            transition: all 0.2s;
        }

        [data-theme="light"] .demo-quick-btn {
            background: rgba(0,199,190,0.1);
            border-color: rgba(0,199,190,0.2);
        }

        .demo-quick-btn:hover {
            background: rgba(0,199,190,0.25);
        }

        .demo-input-area {
            display: flex;
            gap: 8px;
        }

        .demo-input {
            flex: 1;
            padding: 10px 16px;
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            background: rgba(255,255,255,0.05);
            color: white;
            font-size: 13px;
            outline: none;
            transition: all 0.3s;
        }

        .demo-input::placeholder {
            color: var(--text-muted);
        }

        .demo-input:focus {
            border-color: var(--primary);
            background: rgba(255,255,255,0.08);
        }

        [data-theme="light"] .demo-input {
            background: rgba(0,0,0,0.04);
            border-color: rgba(0,0,0,0.1);
            color: #000;
        }

        [data-theme="light"] .demo-input::placeholder {
            color: rgba(0,0,0,0.4);
        }

        .demo-send {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }

        .demo-send:hover {
            transform: scale(1.08);
        }

        .demo-send svg {
            width: 14px;
            height: 14px;
            fill: black;
        }

        /* Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: center;
        }

        .pricing-card {
            padding: 36px 28px;
            border-radius: var(--radius-lg);
            text-align: center;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            overflow: hidden;
        }

        .pricing-card.featured {
            transform: scale(1.05);
            border: 1px solid var(--primary);
        }

        .pricing-card:hover {
            transform: translateY(-8px);
        }

        .pricing-card.featured:hover {
            transform: scale(1.05) translateY(-8px);
        }

        .pricing-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, rgba(0,199,190,0.2), rgba(94,92,230,0.2));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 24px;
        }

        .pricing-name {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
            color: white;
        }

        [data-theme="light"] .pricing-name {
            color: #1a1a1a;
        }

        .pricing-price {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .pricing-price span {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 400;
        }

        .pricing-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .pricing-features {
            list-style: none;
            text-align: left;
            margin-bottom: 24px;
        }

        .pricing-features li {
            padding: 8px 0;
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pricing-features li::before {
            content: '✓';
            color: var(--primary);
            font-weight: 600;
        }

        .pricing-btn {
            width: 100%;
            padding: 12px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .pricing-btn.primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black;
            border: none;
        }

        .pricing-btn.outline {
            background: transparent;
            border: 1px solid var(--glass-border);
            color: white;
        }

        [data-theme="light"] .pricing-btn.outline {
            border-color: rgba(0,0,0,0.2);
            color: #1a1a1a;
        }

        .pricing-btn:hover {
            transform: scale(1.02);
        }

        [data-theme="light"] .pricing-btn.outline:hover {
            background: rgba(0,0,0,0.05);
        }

        /* Contact */
        .contact {
            max-width: 700px;
            margin: 0 auto;
            text-align: center;
        }

        .contact h2 {
            font-size: 32px;
            margin-bottom: 10px;
            color: white;
        }

        [data-theme="light"] .contact h2 {
            color: #1a1a1a;
        }

        .contact > p {
            color: var(--text-muted);
            margin-bottom: 40px;
        }

        .contact-form {
            padding: 36px;
            border-radius: var(--radius-lg);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin-bottom: 14px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid var(--glass-border);
            border-radius: 14px;
            background: rgba(255,255,255,0.05);
            color: white;
            font-size: 14px;
            font-family: inherit;
            outline: none;
            transition: all 0.3s;
        }

        [data-theme="light"] .form-group input,
        [data-theme="light"] .form-group textarea {
            background: rgba(0,0,0,0.04);
            border-color: rgba(0,0,0,0.1);
            color: #000;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-muted);
        }

        [data-theme="light"] .form-group input::placeholder,
        [data-theme="light"] .form-group textarea::placeholder {
            color: rgba(0,0,0,0.4);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            background: rgba(255,255,255,0.08);
        }

        .form-group textarea {
            min-height: 100px;
            resize: vertical;
            margin-bottom: 14px;
        }

        /* Trust Bar */
        .trust-bar {
            padding: 28px 0;
            border-top: 1px solid var(--glass-border);
            border-bottom: 1px solid var(--glass-border);
            margin-bottom: 80px;
            background: var(--glass);
            backdrop-filter: blur(30px) saturate(180%);
            -webkit-backdrop-filter: blur(30px) saturate(180%);
            position: relative;
        }

        .trust-bar::before {
            content: '';
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0,199,190,0.3), transparent);
        }

        [data-theme="light"] .trust-bar {
            background: rgba(255,255,255,0.6);
        }

        .trust-items {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 32px;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .trust-item i {
            color: var(--primary);
            font-size: 16px;
        }

        /* Scenarios - Card Switch Style */
        .scenario-tabs {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }

        .scenario-tab {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 20px;
            background: var(--glass);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            color: var(--text-muted);
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .scenario-tab:hover {
            background: rgba(0,199,190,0.1);
            border-color: rgba(0,199,190,0.3);
            color: var(--primary);
        }

        .scenario-tab.active {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-color: transparent;
            color: black;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(0,199,190,0.3);
        }

        .scenario-tab i {
            font-size: 16px;
        }

        .scenario-content {
            position: relative;
        }

        .scenario-card-content {
            display: none;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            animation: fadeIn 0.4s ease;
        }

        .scenario-card-content.active {
            display: grid;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .scenario-detail {
            padding: 40px;
            border-radius: var(--radius-lg);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .scenario-detail-icon {
            width: 72px;
            height: 72px;
            background: linear-gradient(135deg, rgba(0,199,190,0.2), rgba(94,92,230,0.2));
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            margin-bottom: 20px;
        }

        .scenario-detail h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: white;
        }

        [data-theme="light"] .scenario-detail h3 {
            color: #1a1a1a;
        }

        .scenario-desc {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .scenario-features {
            list-style: none;
            margin-bottom: 28px;
        }

        .scenario-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text-light);
            border-bottom: 1px solid var(--glass-border);
        }

        [data-theme="light"] .scenario-features li {
            color: rgba(0,0,0,0.7);
        }

        .scenario-features li:last-child {
            border-bottom: none;
        }

        .scenario-features li i {
            color: var(--primary);
            font-size: 12px;
        }

        .scenario-visual {
            padding: 32px;
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .chat-preview {
            width: 100%;
            max-width: 360px;
            background: var(--bg-secondary);
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: 0 10px 40px rgba(0,0,0,0.3);
            transition: all 0.4s;
        }

        .scenario-card-content.active .chat-preview {
            animation: chatPreviewIn 0.5s ease;
        }

        @keyframes chatPreviewIn {
            from { opacity: 0; transform: scale(0.95); }
            to { opacity: 1; transform: scale(1); }
        }

        .chat-preview:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 50px rgba(0,0,0,0.4);
        }

        .chat-preview-header {
            padding: 16px 20px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            font-weight: 600;
            font-size: 14px;
        }

        .chat-preview-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            min-height: 200px;
        }

        .chat-preview-body .msg {
            display: flex;
            gap: 8px;
        }

        .chat-preview-body .msg.ai {
            align-self: flex-start;
        }

        .chat-preview-body .msg.user {
            align-self: flex-end;
            flex-direction: row-reverse;
        }

        .chat-preview-body .b {
            max-width: 80%;
            padding: 10px 14px;
            border-radius: 16px;
            font-size: 13px;
            line-height: 1.4;
        }

        .chat-preview-body .msg.ai .b {
            background: rgba(255,255,255,0.1);
            color: white;
            border-bottom-left-radius: 4px;
        }

        [data-theme="light"] .chat-preview-body .msg.ai .b {
            background: rgba(0,0,0,0.06);
            color: #1a1a1a;
        }

        .chat-preview-body .msg.user .b {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black;
            border-bottom-right-radius: 4px;
        }

        @media (max-width: 900px) {
            .scenario-tabs {
                gap: 8px;
            }

            .scenario-tab {
                padding: 10px 16px;
                font-size: 13px;
            }

            .scenario-tab span {
                display: none;
            }

            .scenario-card-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .scenario-detail {
                padding: 28px;
            }

            .scenario-detail h3 {
                font-size: 24px;
            }
        }

        /* CTA */
        .cta-section {
            border-radius: 32px;
            padding: 50px;
            text-align: center;
            margin-bottom: 60px;
        }

        .cta-section h2 {
            font-size: 28px;
            margin-bottom: 10px;
            color: white;
        }

        [data-theme="light"] .cta-section h2 {
            color: #1a1a1a;
        }

        .cta-section p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .cta-section .btn {
            padding: 14px 32px;
            font-size: 15px;
        }

        /* Footer */
        footer {
            padding: 60px 0 20px;
            border-top: 1px solid var(--glass-border);
        }

        .footer-main {
            display: grid;
            grid-template-columns: 1.2fr 2fr;
            gap: 60px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 13px;
            max-width: 280px;
            margin-top: 14px;
            margin-bottom: 18px;
            line-height: 1.6;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--glass);
            border: 1px solid var(--glass-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 16px;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: black;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0,199,190,0.3);
        }

        [data-theme="light"] .footer-social a {
            background: rgba(0,0,0,0.05);
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 18px;
            color: white;
        }

        [data-theme="light"] .footer-col h4 {
            color: #1a1a1a;
        }

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

        .footer-col li {
            margin-bottom: 12px;
        }

        .footer-col a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 13px;
            transition: all 0.3s;
            display: inline-block;
        }

        .footer-col a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }

        .contact-info li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .contact-info i {
            color: var(--primary);
            width: 16px;
        }

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--glass-border);
        }

        .footer-bottom-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .footer-bottom p {
            color: var(--text-muted);
            font-size: 12px;
        }

        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom .icp {
            color: var(--text-muted);
            opacity: 0.7;
        }

        .footer-bottom .icp a {
            color: var(--text-muted);
            text-decoration: none;
            opacity: 0.7;
        }

        .footer-bottom .icp a:hover {
            text-decoration: underline;
        }

        @media (max-width: 900px) {
            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-brand {
                text-align: center;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer-social {
                justify-content: center;
            }

            .footer-links {
                grid-template-columns: repeat(2, 1fr);
                text-align: center;
            }

            .footer-bottom-content {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        /* Mobile */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            padding: 10px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--glass);
            border: 1px solid var(--glass-border);
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .mobile-toggle:hover {
            background: rgba(255,255,255,0.15);
            border-color: var(--primary);
        }

        .mobile-toggle span {
            width: 20px;
            height: 2px;
            background: white;
            border-radius: 2px;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
        }

        [data-theme="light"] .mobile-toggle span {
            background: #000;
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: -20px;
            right: -20px;
            background: rgba(0,0,0,0.95);
            backdrop-filter: blur(30px) saturate(180%);
            -webkit-backdrop-filter: blur(30px) saturate(180%);
            padding: 16px 20px;
            flex-direction: column;
            gap: 4px;
            border-radius: 0 0 20px 20px;
            opacity: 0;
            transform: translateY(-15px) scale(0.95);
            transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            box-shadow: 0 20px 60px rgba(0,0,0,0.5);
            border: 1px solid var(--glass-border);
            border-top: none;
        }

        [data-theme="light"] .mobile-nav {
            background: rgba(255,255,255,0.95);
            box-shadow: 0 20px 60px rgba(0,0,0,0.15);
        }

        .mobile-nav.show {
            display: flex;
            opacity: 1;
            transform: translateY(0) scale(1);
        }

        .mobile-nav a {
            padding: 14px 16px;
            border-radius: 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
            overflow: hidden;
        }

        .mobile-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--primary);
        }

        .mobile-nav a::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
            opacity: 0;
            transition: opacity 0.2s;
        }

        .mobile-nav a:hover {
            background: rgba(255,255,255,0.1);
            color: white;
            transform: translateX(4px);
        }

        .mobile-nav a:hover::before {
            opacity: 1;
        }

        [data-theme="light"] .mobile-nav a {
            color: #1a1a1a;
        }

        [data-theme="light"] .mobile-nav a:hover {
            background: rgba(0,0,0,0.05);
            color: #000;
        }

        .mobile-nav .btn-mobile-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: black !important;
            font-weight: 600;
            text-align: center;
            justify-content: center;
            margin-top: 8px;
            padding: 16px;
        }

        .mobile-nav .btn-mobile-cta:hover {
            transform: translateX(0) scale(1.02);
            box-shadow: 0 6px 20px rgba(0,199,190,0.3);
        }

        .mobile-nav .btn-mobile-cta::before {
            display: none;
        }

        /* Hamburger Animation */
        .mobile-toggle.active {
            background: rgba(255,255,255,0.15);
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translateY(6px);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scale(0);
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translateY(-6px);
        }

        @media (max-width: 900px) {
            .nav-links {
                display: none;
            }

            .mobile-toggle {
                display: flex;
                z-index: 1001;
            }

            .header-actions {
                display: flex;
                gap: 8px;
            }

            .header-actions .btn-primary {
                display: none;
            }

            .hero-content, .advantages, .demo-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero {
                padding: 140px 0 80px;
            }

            .hero-text {
                text-align: center;
            }

            .hero-text h1 {
                font-size: 32px;
            }

            .hero-text p {
                max-width: 100%;
            }

            .hero-buttons {
                justify-content: center;
            }

            .hero-image {
                order: -1;
                max-width: 360px;
                margin: 0 auto;
            }

            .features-grid, .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 360px;
                margin: 0 auto;
            }

            .section {
                padding: 80px 0;
            }

            .section-header {
                margin-bottom: 40px;
            }

            .section-header h2 {
                font-size: 28px;
            }

            .pricing-card.featured {
                transform: none;
            }

            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }

            .advantages-text {
                text-align: center;
            }

            .advantage-list {
                align-items: center;
            }

            .demo-section {
                padding: 30px 20px;
            }

            .demo-text {
                text-align: center;
            }

            .demo-features {
                align-items: center;
            }

            .footer-content {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }

            .footer-brand {
                grid-column: span 2;
                text-align: center;
            }

            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 500px) {
            .hero-text h1 {
                font-size: 28px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .demo-chat-body {
                max-height: 260px;
            }

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

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

            .footer-brand {
                grid-column: span 1;
            }
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 999;
            display: none;
        }

        .floating-cta.visible {
            display: block;
        }

        /* Floating Theme Button */
        .floating-theme {
            position: fixed;
            bottom: 20px;
            left: 20px;
            z-index: 999;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            border: 1px solid var(--glass-border);
            background: var(--glass);
            backdrop-filter: blur(20px);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-light);
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }

        .floating-theme:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: black;
            transform: scale(1.1) rotate(15deg);
            box-shadow: 0 6px 30px rgba(0,199,190,0.4);
        }

        .floating-theme i {
            transition: transform 0.3s ease;
        }

        .floating-theme:hover i {
            transform: rotate(180deg);
        }

        [data-theme="light"] .floating-theme {
            background: rgba(255,255,255,0.9);
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        }

        @media (max-width: 600px) {
            .floating-theme {
                bottom: 80px;
                left: 16px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }

            .floating-cta {
                bottom: 16px;
                right: 16px;
                left: 16px;
            }

            .floating-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* Success */
        .success-msg {
            display: none;
            color: var(--primary);
            margin-top: 14px;
            text-align: center;
        }

        [data-theme="light"] .success-msg {
            color: #00a89c;
        }

        .success-msg.show {
            display: block;
        }

        /* Scrollbar */
        .demo-chat-body

        .demo-chat-body

        [data-theme="light"] .demo-chat-body