:root{color-scheme:light;--ink:#0d0d0d;--muted:#5d5d5d;--line:#e6e6e6;--green:#00863c;--bg:#fcfcfc}
    *{box-sizing:border-box}
    body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
    main{max-width:1000px;margin:0 auto;padding:44px 28px 72px}
    a{color:var(--green)}
    .back{display:inline-block;margin-bottom:34px;color:var(--muted);font-size:.95rem;text-decoration:none}
    .back:hover{color:var(--ink)}
    .langswitch{display:inline-flex;align-items:center;margin:0 0 26px;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-size:.78rem;font-weight:700;letter-spacing:.06em}
    .langswitch a{display:inline-flex;align-items:center;justify-content:center;min-width:38px;padding:5px 9px;color:var(--muted);text-decoration:none}
    .langswitch a:hover{background:rgba(0,0,0,.05);color:var(--ink)}
    .langswitch a[aria-current="true"]{background:var(--ink);color:#fff}
    .langswitch a:focus-visible{outline:2px solid var(--green);outline-offset:2px;position:relative;z-index:1}

    .intro h1{font-size:clamp(2.2rem,5vw,3rem);line-height:1.08;letter-spacing:-.04em;margin:0 0 18px;max-width:860px}
    .free{display:inline-flex;align-items:center;margin:0 0 32px;padding:6px 14px;border-radius:999px;background:var(--green);color:#fff;font-size:.95rem;font-weight:700;letter-spacing:.01em}
    .version{font-size:clamp(1.9rem,4.4vw,2.75rem);font-weight:700;line-height:1.1;letter-spacing:-.03em;margin:0 0 10px}
    .version-note{color:var(--muted);font-size:1.15rem;margin:0 0 30px}
    .cta{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:72px;padding:18px 24px;border:0;border-radius:999px;background:var(--ink);color:#fff;font-size:1.25rem;font-weight:600;letter-spacing:-.01em;text-decoration:none;transition:background .2s ease,transform .2s ease}
    .cta:hover{background:#252525;transform:translateY(-1px)}
    .cta:focus-visible{outline:3px solid var(--green);outline-offset:3px}
    .cta-icon{width:20px;height:20px;flex:none}

    .install{margin-top:64px}
    .install h2,.versions h2{font-size:clamp(1.55rem,3vw,1.9rem);line-height:1.2;letter-spacing:-.02em;margin:0 0 20px}
    .changelog h2{font-size:clamp(1.55rem,3vw,1.9rem);line-height:1.2;letter-spacing:-.02em;margin:0 0 18px}
    .steps{list-style:none;margin:0;padding:0;display:grid;gap:20px;counter-reset:step;font-size:1.25rem;line-height:1.5}
    .steps li{display:grid;grid-template-columns:1.8em 1fr;gap:.2em;counter-increment:step}
    .steps li::before{content:counter(step) ".";font-weight:600}

    .versions{margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
    .version-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:14px 32px}
    .version-list a{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-size:1.2rem;font-weight:600;text-decoration:none}
    .version-list a:hover{color:var(--green)}
    .badge{padding:2px 8px;border:1px solid currentColor;border-radius:999px;color:var(--green);font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}

    .changelog{margin-top:56px;padding-top:32px;border-top:1px solid var(--line)}
    .changelog>p{color:var(--muted);margin:0 0 8px}
    .changelog details{margin:14px 0;padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:#fff}
    .changelog summary{cursor:pointer;color:var(--ink);font-weight:600}
    .changelog details[open] summary{margin-bottom:12px}
    .changelog ul{padding-left:22px}
    .changelog li{margin:10px 0;color:var(--muted)}

    @media(max-width:520px){
      main{padding:24px 18px 48px}
      .back{margin-bottom:24px}
      .intro h1{font-size:2.1rem}
      .cta{min-height:58px}
      .install{margin-top:48px}
      .steps{font-size:1.08rem;gap:14px}
      .versions,.changelog{margin-top:44px;padding-top:24px}
    }