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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: #0a0a0f;
            min-height: 100vh;
            color: #e0e0e0;
            overflow-x: hidden;
        }

        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: 
                radial-gradient(ellipse at 20% 50%, rgba(0, 140, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(0, 200, 255, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(100, 140, 255, 0.05) 0%, transparent 50%),
                #0a0a0f;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 3rem 1.5rem 2rem 1.5rem;
            position: relative;
        }

        h1 {
            font-size: clamp(2.5rem, 6vw, 4rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            background: linear-gradient(135deg, #ffffff 0%, #4da8ff 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
            text-align: center;
            line-height: 1.1;
        }

        .hero-subtitle {
            text-align: center;
            font-size: clamp(0.95rem, 2.5vw, 1.15rem);
            color: #a0a0b0;
            max-width: 550px;
            margin: 0 auto 2.5rem auto;
            line-height: 1.5;
        }

        .card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 24px;
            padding: 2rem;
            backdrop-filter: blur(10px);
            margin-bottom: 1.5rem;
        }

        .card p {
            color: #b0b0c0;
            line-height: 1.6;
            margin-bottom: 1rem;
            font-size: 0.95rem;
        }

        .card p:last-child {
            margin-bottom: 0;
        }

        .limit-notice {
            background: rgba(255, 180, 0, 0.08);
            border: 1px solid rgba(255, 180, 0, 0.2);
            border-radius: 12px;
            padding: 0.8rem 1rem;
            margin: 1rem 0;
            text-align: center;
            font-size: 0.9rem;
            color: #d0b060;
        }

        .limit-notice strong {
            color: #ffb74d;
        }

        .limit-notice a {
            color: #ffb74d;
        }

        .supported-systems {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            margin: 1rem 0;
        }

        .system-tag {
            background: rgba(77, 168, 255, 0.1);
            border: 1px solid rgba(77, 168, 255, 0.2);
            color: #80c0ff;
            padding: 0.3rem 0.9rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        .support-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 16px;
            padding: 1.2rem 1.5rem;
            backdrop-filter: blur(10px);
            text-align: center;
            margin-bottom: 1.5rem;
        }

        .support-card p {
            color: #b0b0c0;
            font-size: 0.9rem;
            margin: 0;
        }

        .support-card .support-sub {
            font-size: 0.85rem;
            color: #808090;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #4da8ff;
            color: #0a0a0f;
            padding: 0.85rem 2rem;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            transition: all 0.3s ease;
            border: 2px solid transparent;
            box-shadow: 0 4px 20px rgba(77, 168, 255, 0.25);
        }

        .btn:hover {
            background: #3d94e8;
            box-shadow: 0 8px 30px rgba(77, 168, 255, 0.4);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.2);
            box-shadow: none;
            font-size: 0.9rem;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            display: inline-block;
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
            box-shadow: none;
        }

        .btn-wrap {
            text-align: center;
            margin-top: 1rem;
        }

        .links-section {
            text-align: center;
            font-size: 0.9rem;
            color: #9090a0;
            line-height: 1.8;
        }

        .links-section a {
            color: #4da8ff;
            text-decoration: none;
            transition: color 0.2s;
        }

        .links-section a:hover {
            color: #80c0ff;
            text-decoration: underline;
        }

        .divider {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin: 1.5rem 0;
        }

        .disclaimer {
            font-size: 0.75rem;
            color: #606070;
            text-align: center;
            line-height: 1.6;
            margin-bottom: 0.5rem;
        }

        .disclaimer-small {
            font-size: 0.7rem;
            color: #505060;
            text-align: center;
            line-height: 1.6;
        }

        footer {
            text-align: center;
            opacity: 0.5;
            font-size: 0.85rem;
            margin-top: 1.5rem;
            color: #808090;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 1.5rem;
        }

        @media (max-width: 600px) {
            .container {
                padding: 2rem 1rem 1.5rem 1rem;
            }
            .card {
                padding: 1.5rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

.faq details,
details {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    margin: 0.5rem auto;
    max-width: 700px;
}

details summary {
    cursor: pointer;
    font-weight: 500;
    color: #c0d0e0;
}

details p {
    color: #9090a0;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}