/* CSS resets and variables */
        :root {
            --bg-color: #050505;
            --surface: #111111;
            --surface-glass: rgba(255, 255, 255, 0.03);
            --border-glass: rgba(255, 255, 255, 0.08);
            --text-main: #ffffff;
            --text-muted: #a1a1aa;
            --accent: #10b981; /* Emerald */
            --accent-glow: rgba(16, 185, 129, 0.2);
            --accent-2: #06b6d4; /* Cyan */
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
            transition: opacity 0.3s;
        }

        /* Language Toggle Visibility */
        body.lang-zh [lang="en"] { display: none !important; }
        body.lang-en [lang="zh"] { display: none !important; }

        /* Ambient orb effects */
        .ambient-orb {
            position: fixed;
            border-radius: 50%;
            filter: blur(100px);
            z-index: -1;
            opacity: 0.4;
            animation: float 20s infinite alternate ease-in-out;
            pointer-events: none;
        }

        .orb-1 { width: 400px; height: 400px; background: var(--accent-glow); top: -100px; left: -100px; animation-delay: 0s; }
        .orb-2 { width: 350px; height: 350px; background: rgba(6, 182, 212, 0.2); bottom: 20%; right: -100px; animation-delay: -5s; }
        .orb-3 { width: 300px; height: 300px; background: rgba(59, 130, 246, 0.2); top: 50%; left: 20%; animation-delay: -2s; }

        @keyframes float {
            0% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(50px, 30px) scale(1.1); }
            100% { transform: translate(-30px, 50px) scale(0.9); }
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Glass component */
        .glass {
            background: var(--surface-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: 24px;
        }

        /* Header */
        header {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-glass);
        }
        .logo { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; color: white; display:flex; align-items:center; gap:8px;}
        .logo span { color: var(--accent); }
        
        .header-right {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        
        .trust-badges { display: flex; gap: 12px; font-size: 0.9rem; color: var(--text-muted); align-items:center;}
        
        .lang-toggle {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid var(--border-glass);
            color: white;
            padding: 6px 12px;
            border-radius: 100px;
            cursor: pointer;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .lang-toggle:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.3);
        }

        /* Hero */
        .hero {
            padding: 80px 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3.5rem;
            line-height: 1.2;
            font-weight: 700;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.03em;
        }
        .hero-content p {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
        }
        .lead-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 400px;
        }
        .input-group input {
            width: 100%;
            padding: 16px 20px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: white;
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .input-group input:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.08);
        }
        .btn {
            background: linear-gradient(135deg, var(--accent) 0%, #047857 100%);
            color: white;
            border: none;
            padding: 18px 32px;
            border-radius: 100px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 15px var(--accent-glow);
            text-align: center;
            text-decoration: none;
            display: inline-block;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
        }
        .reassurance {
            font-size: 0.85rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }

        /* Section generic */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-glass);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.5rem;
            font-weight: 600;
            background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Grid Cards (3 col) */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card {
            padding: 32px;
            text-align: center;
            transition: transform 0.3s;
        }
        .card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.05);
        }
        .card h3 { font-size: 1.2rem; margin-bottom: 12px; color: white;}
        .card p { color: var(--text-muted); font-size: 0.95rem; }

        /* Trusted By */
        .trusted-by {
            padding: 60px 0;
            text-align: center;
        }
        .trusted-by p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 24px; text-transform: uppercase; letter-spacing: 2px;}
        .logos-flex {
            display: flex;
            justify-content: center;
            gap: 40px;
            opacity: 0.5;
            flex-wrap: wrap;
        }
        .logo-placeholder {
            height: 30px;
            width: 100px;
            background: rgba(255,255,255,0.2);
            border-radius: 4px;
        }

        /* How it works */
        .steps {
            display: flex;
            align-items: stretch;
            justify-content: space-between;
            gap: 20px;
            position: relative;
        }
        .step {
            flex: 1;
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            padding: 32px 24px;
            border-radius: 24px;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .step-number {
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 16px;
        }
        .step h3 { margin-bottom: 12px; }
        .steps-connector {
            position: absolute;
            top: 52px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: var(--border-glass);
            z-index: 1;
        }

        /* Product Image & Benefits */
        .product-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .product-section .phone-carousel {
            justify-self: center;
        }
        .benefits-list {
            list-style: none;
        }
        .benefits-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 24px;
            font-size: 1.1rem;
        }
        .check-icon {
            color: var(--accent);
            font-size: 1.2rem;
            margin-top: 2px;
        }
        .benefits-list h4 { color: white; margin-bottom: 4px; font-size: 1.1rem; }
        .benefits-list p { color: var(--text-muted); font-size: 0.95rem; }

        /* FAQs */
        .faq-item {
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            border-radius: 16px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s;
        }
        .faq-question {
            padding: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 500;
        }
        .faq-question:hover { background: rgba(255,255,255,0.02); }
        .faq-icon { font-size: 1.5rem; color: var(--accent); transition: transform 0.3s; }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            color: var(--text-muted);
        }
        .faq-item.active .faq-answer {
            padding: 0 24px 24px;
            max-height: 200px;
        }
        .faq-item.active .faq-icon { transform: rotate(45deg); }

        /* CTA Bottom */
        .cta-bottom {
            text-align: center;
            padding: 100px 0;
            border-bottom: none;
        }
        .cta-bottom h2 { margin-bottom: 32px; font-size: 3rem;}
        
        /* Footer */
        footer {
            padding: 40px 0;
            border-top: 1px solid var(--border-glass);
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .footer-links {
            display: flex;
            gap: 24px;
        }
        .footer-links a { color: var(--text-muted); text-decoration: none; transition: color 0.3s;}
        .footer-links a:hover { color: white; }

        /* Phone Carousel */
        .phone-carousel {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
        }
        .carousel-phone {
            position: relative;
            width: 100%;
            max-width: 280px;
            border-radius: 32px;
            overflow: hidden;
            box-shadow:
                0 24px 80px rgba(0, 0, 0, 0.6),
                0 0 60px rgba(16, 185, 129, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: #000;
        }
        .carousel-img {
            display: block;
            width: 100%;
            position: absolute;
            top: 0;
            left: 0;
            opacity: 0;
            transform: scale(0.96);
            transition: opacity 0.5s ease, transform 0.5s ease;
        }
        .carousel-img.active {
            position: relative;
            opacity: 1;
            transform: scale(1);
        }
        .carousel-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .carousel-tab {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: 100px;
            font-family: inherit;
            font-size: 0.82rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
        }
        .carousel-tab:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }
        .carousel-tab.active {
            background: linear-gradient(135deg, var(--accent), #047857);
            border-color: transparent;
            color: #fff;
            box-shadow: 0 4px 12px var(--accent-glow);
        }

        @media (max-width: 768px) {
            .hero, .product-section { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .steps { flex-direction: column; }
            .steps-connector { display: none; }
            .hero-content h1 { font-size: 2.5rem; }
            .footer-content { flex-direction: column; gap: 24px; text-align: center; }
            .header-right { flex-direction: column; gap: 12px; align-items: flex-end; }
            .carousel-phone { max-width: 220px; }
            .carousel-tab { padding: 6px 12px; font-size: 0.78rem; }
        }

/* SUBPAGE SPECIFIC STYLES */
/* Glassmorphism Card for Content */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid var(--glass-border);
            border-radius: 24px;
            padding: 50px;
            width: 100%;
            text-align: left;
            box-shadow: 0 24px 40px rgba(0, 0, 0, 0.4);
        }

        /* Typography */
        h1 {
            font-size: 2.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 8px;
            background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        h2 {
            font-size: 1.4rem;
            font-weight: 600;
            margin-top: 40px;
            margin-bottom: 16px;
            color: #ececec;
        }

        p {
            margin-bottom: 24px;
            color: #d1d5db;
        }

        /* Strong emphasis text */
        strong {
            color: #ffffff;
            font-weight: 600;
        }

        a {
            color: #60a5fa;
            text-decoration: none;
            transition: color 0.2s;
        }

        a:hover {
            text-decoration: underline;
        }

        .contact-email {
            display: inline-block;
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid var(--accent);
            color: var(--accent);
            padding: 16px 24px;
            border-radius: 12px;
            font-size: 1.1rem;
            font-weight: 500;
            margin-top: 16px;
            margin-bottom: 32px;
            transition: all 0.3s;
        }

        .contact-email:hover {
            background: rgba(16, 185, 129, 0.2);
            text-decoration: none;
            transform: translateY(-2px);
        }

        /* Footer */
        footer {
            position: relative;
            z-index: 1;
            padding: 30px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: auto;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
        }

        @media (max-width: 600px) {
            .glass-card { padding: 30px 20px; border-radius: 16px; }
            h1 { font-size: 2rem; }
            .contact-email { font-size: 1rem; padding: 12px 20px; word-break: break-all; }
        }

/* Header Container */
        .header-container {
            width: 100%;
            padding: 0 24px;
        }