.article-page{background:var(--paper)}.article-page main{overflow:visible}.letter{max-width:760px;margin:auto;padding:34px 20px 60px}.back-link{display:inline-block;margin-bottom:28px;color:var(--green-dark);font-weight:700;text-decoration:none}.letter h1{font-size:clamp(38px,10vw,58px);margin-bottom:18px}.letter-intro{padding:16px 18px;border-left:4px solid var(--green);background:var(--mint);border-radius:0 16px 16px 0;font-weight:600;line-height:1.5}.letter-body{margin-top:30px;padding:22px 18px;background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.letter-body p,.letter-body li{font-size:17px;line-height:1.7}.letter-body ul{padding-left:22px}.letter-body li+li{margin-top:12px}.letter-body .highlight{margin:24px -4px;padding:16px;background:#f3e2d8;border-radius:14px;color:var(--ink)}.article-actions{margin-top:24px}.back-bottom{display:block;text-align:center;margin-top:20px;color:var(--green-dark);font-weight:700}@media(min-width:760px){.letter{padding-top:60px}.letter-body{padding:42px}.letter-intro{font-size:18px}}