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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #070D14;
    color: #e2e8f0;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 32px 24px;
}

header {
    padding: 100px 0 72px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    text-align: center;
}

.logo-image {
    width: 240px;
    height: auto;
    margin-bottom: 32px;
    opacity: 0.95;
}

h1 {
    font-size: clamp(2.2rem, 6vw, 4rem);
    line-height: 1.1;
    margin: 0 auto 24px;
    max-width: 820px;
    letter-spacing: -0.03em;
}

.subtitle {
    font-size: 1.15rem;
    max-width: 680px;
    margin: 0 auto;
    color: #94a3b8;
}

section {
    padding: 72px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 28px;
    letter-spacing: -0.02em;
}

p {
    max-width: 760px;
    color: #cbd5e1;
}

p + p {
    margin-top: 18px;
}

.card {
    margin-top: 32px;
    padding: 32px;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 14px;
    background: rgba(255,255,255,0.02);
    transition:
        border-color 0.2s ease,
        background 0.2s ease;
}

.card:hover {
    border-color: rgba(255,255,255,0.16);
    background: rgba(255,255,255,0.025);
}

.card > * + * {
    margin-top: 28px;
}

.card h3 {
    font-size: 1.4rem;
    letter-spacing: -0.02em;
}

.product-summary {
    font-size: 1.08rem;
    color: #dbe4f0;
    max-width: 720px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.feature {
    padding: 22px;
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    background: rgba(255,255,255,0.015);
}

.feature h4 {
    margin-bottom: 10px;
    font-size: 1rem;
    color: #f1f5f9;
    letter-spacing: -0.01em;
}

.feature p {
    font-size: 0.95rem;
    color: #94a3b8;
    max-width: none;
}

.technical-note {
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
    color: #94a3b8;
}

.button {
    display: inline-block;
    margin-top: 8px;
    padding: 12px 20px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    color: white;
    text-decoration: none;
    transition:
        background 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.button:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-1px);
}

footer {
    padding: 56px 0 32px;
    color: #64748b;
    font-size: 0.95rem;
    text-align: center;
}

.product-cta {
    margin-top: 40px;
}


@media (max-width: 640px) {
    header {
        padding-top: 72px;
    }

    .logo-image {
        width: 110px;
    }

    .subtitle {
        font-size: 1.05rem;
    }

    section {
        padding: 56px 0;
    }

    .card {
        padding: 24px;
    }

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