* { box-sizing: border-box; }
    body { margin: 0; background: #fff; color: #000f86; font-family: Arial, Helvetica, sans-serif; }
    .arc-header { padding: 24px; border-bottom: 3px solid #000f86; }
    .arc-header-inner { width: 100%; max-width: 1200px; margin: 0 auto; }
    .arc-logo { display: block; width: 620px; max-width: 100%; height: auto; }
    main { min-height: 65vh; display: grid; place-items: center; padding: 64px 24px; }
    h1 { max-width: 900px; margin: 0; text-align: center; font-size: clamp(24px, 3.2vw, 40px); font-weight: 500; line-height: 1.45; text-wrap: balance; }
    @media (max-width: 600px) { .arc-header { padding: 20px 16px; } main { padding: 48px 20px; } }