:root {
    --product-blue: #0050b3;
    --product-cyan: #00bfe8;
    --product-ink: #172b3d;
    --product-muted: #536579;
    --product-paper: #f4f8fb;
    --product-line: #dce6ed;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--product-paper); color: var(--product-ink); font-family: 'Roboto', Arial, sans-serif; line-height: 1.6; }
a { color: inherit; }
.product-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px max(24px, calc((100% - 1120px) / 2)); background: #fff; border-bottom: 1px solid var(--product-line); }
.product-brand img { display: block; width: 172px; height: auto; }
.product-back { color: var(--product-blue); font-size: .95rem; font-weight: 600; text-decoration: none; }
.product-back:hover { text-decoration: underline; }
.product-main { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 88px; }
.product-hero { padding-bottom: 44px; border-bottom: 1px solid var(--product-line); }
.product-logo { display: block; width: min(260px, 70vw); height: 70px; margin-bottom: 30px; object-fit: contain; object-position: left center; }
.product-eyebrow { margin: 0 0 10px; color: var(--product-blue); font-size: .85rem; font-weight: 700; text-transform: uppercase; }
.product-hero h1 { max-width: 820px; margin: 0 0 18px; font-size: 2.8rem; line-height: 1.12; }
.product-description { max-width: 760px; margin: 0; color: var(--product-muted); font-size: 1.15rem; }
.product-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.product-button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 9px; padding: 11px 20px; border: 1px solid var(--product-blue); border-radius: 5px; background: var(--product-blue); color: #fff; font-weight: 700; text-decoration: none; }
.product-button--quiet { background: transparent; color: var(--product-blue); }
.product-button:hover { filter: brightness(.92); }
.product-features { padding-top: 44px; }
.product-features h2 { margin: 0 0 24px; font-size: 1.8rem; }
.product-feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.product-feature { min-height: 165px; padding: 22px; border: 1px solid var(--product-line); border-radius: 6px; background: #fff; }
.product-feature i { margin-bottom: 14px; color: var(--product-blue); font-size: 1.35rem; }
.product-feature h3 { margin: 0 0 8px; font-size: 1.08rem; }
.product-feature p { margin: 0; color: var(--product-muted); font-size: .94rem; }
.product-footer { padding: 22px 24px; background: #0d1a2d; color: rgba(255,255,255,.8); font-size: .84rem; text-align: center; }

@media (max-width: 800px) {
    .product-feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
    .product-header { padding: 12px 18px; }
    .product-brand img { width: 142px; }
    .product-back { font-size: .85rem; }
    .product-main { width: calc(100% - 36px); padding: 50px 0 64px; }
    .product-hero h1 { font-size: 2rem; }
    .product-description { font-size: 1rem; }
    .product-actions { flex-direction: column; align-items: stretch; }
    .product-feature-grid { grid-template-columns: 1fr; }
}