:root{--bg:#f6f2e9;--paper:#fffdf8;--ink:#171717;--muted:#6a675f;--line:#ded8cc;--accent:#ff5a36}
    *{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}
    main{max-width:900px;margin:0 auto;padding:48px 22px 80px}.top{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:34px}.brand{font-weight:950;font-size:20px}.back{color:var(--ink);font-weight:800}
    article{background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:clamp(24px,5vw,52px)}h1{font-size:clamp(34px,6vw,58px);line-height:1;margin:0 0 12px}h2{margin-top:34px;font-size:22px}h3{margin-top:24px}p,li{color:#45413b}a{color:inherit}.meta{color:var(--muted);font-size:14px}.box{border:1px solid var(--line);background:#fffaf1;border-radius:14px;padding:14px 16px}.retention{width:100%;border-collapse:collapse;margin:16px 0}.retention th,.retention td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}.retention th{font-size:13px}