/* 馆主手札：样式仅作用于作者简介 */
#author-letter{--paper:#fbf6e9;--paper-edge:#dfc9a5;--ink:#41362e;--muted:#796959;--mark:#a65a38;--rule:#cfb896;max-width:680px;margin:1.5rem auto 2rem;padding:clamp(1.4rem,5vw,3.5rem);box-sizing:border-box;position:relative;color:var(--ink);background:var(--paper);border:1px solid var(--paper-edge);box-shadow:0 15px 45px #241a151b,inset 0 0 0 6px var(--paper),inset 0 0 0 7px var(--paper-edge);font-family:Georgia,"Noto Serif SC","Songti SC",serif}
#author-letter *{box-sizing:border-box}
#author-letter .letter-cover{border-bottom:1px solid var(--rule);padding:0 0 1.5rem;margin-bottom:2rem}
#author-letter .letter-meta{display:flex;justify-content:space-between;gap:1rem;color:var(--muted);font:600 .66rem/1.5 Georgia,serif;letter-spacing:.15em;text-transform:uppercase}
#author-letter .letter-kicker{margin:2rem 0 .45rem;color:var(--mark);font-size:.72rem;letter-spacing:.24em}
#author-letter h2{margin:.2rem 0 .55rem;color:var(--ink);font-size:clamp(1.7rem,5vw,2.5rem);letter-spacing:.1em;line-height:1.35;border:0;padding:0}
#author-letter .letter-subtitle{margin:0;color:var(--muted);font-size:.85rem;letter-spacing:.12em}
#author-letter .letter-greeting{color:var(--mark);font-size:.82rem;letter-spacing:.18em;margin:0 0 1.5rem}
#author-letter p,#author-letter li{color:var(--ink);font-size:1rem;line-height:2;text-indent:0}
#author-letter p{margin:0 0 1.2rem}
#author-letter .declarations{list-style:none;padding:0;margin:1.8rem 0 2rem;border-top:1px solid var(--rule)}
#author-letter .declarations li{padding:.8rem 0 .8rem 2.3rem;border-bottom:1px solid var(--rule);position:relative}
#author-letter .declarations li::before{content:attr(data-no);position:absolute;left:0;top:1rem;font:600 .7rem Georgia,serif;color:var(--mark)}
#author-letter .letter-section{padding-top:.8rem}
#author-letter .letter-section h3{color:var(--ink);font-size:1.2rem;letter-spacing:.1em;margin:0 0 1.2rem;padding:0;border:0}
#author-letter .section-index{display:block;color:var(--mark);font:600 .65rem Georgia,serif;letter-spacing:.18em;margin-bottom:.6rem}
#author-letter .letter-footer{display:flex;align-items:center;justify-content:space-between;gap:1rem;border-top:1px solid var(--rule);margin-top:2rem;padding-top:1.5rem}
#author-letter .letter-signature{text-align:right;color:var(--ink);font-size:1.05rem;letter-spacing:.1em}
#author-letter .sig-line{display:block;color:var(--muted);font-size:.72rem;letter-spacing:.12em;margin-top:.4rem}
#author-letter .seal{display:grid;place-items:center;flex:0 0 58px;width:58px;height:58px;color:#f7dcc1;background:radial-gradient(circle at 32% 25%,#cf7553,#8a352c 65%,#61251f);border-radius:47% 53% 48% 52%/53% 46% 54% 47%;box-shadow:0 3px 8px #29100d40,inset 0 0 0 3px #742b24,inset 0 0 0 4px #e4a78288;font-size:1.25rem}
body.theme-spacetech #author-letter{--paper:#142632;--paper-edge:#416c7e;--ink:#e4f1ee;--muted:#a5c2c6;--mark:#80d9df;--rule:#416c7e}
body.theme-poolcore #author-letter{--paper:#e5f5ef;--paper-edge:#9accc5;--ink:#254b4c;--muted:#587b78;--mark:#317f80;--rule:#a2cbc4}
body.theme-forest #author-letter{--paper:#edf0df;--paper-edge:#b8c7a5;--ink:#344533;--muted:#65735d;--mark:#59754d;--rule:#bac8a9}
body.theme-wasteland #author-letter{--paper:#e8ddc7;--paper-edge:#aa9275;--ink:#47392e;--muted:#75634f;--mark:#9b5234;--rule:#b9a286}
body.theme-dos #author-letter{--paper:#101d15;--paper-edge:#4c8c58;--ink:#c8ecc6;--muted:#8cb98a;--mark:#73df83;--rule:#487650;font-family:monospace}
body.theme-ink #author-letter{--paper:#fff;--paper-edge:#222;--ink:#161616;--muted:#555;--mark:#222;--rule:#999;box-shadow:none}
body.theme-ink #author-letter .seal{background:#222;color:#fff;box-shadow:none}
@media(max-width:600px){#author-letter{margin:1rem auto;padding:1.5rem 1.25rem 1.7rem}#author-letter .letter-meta{font-size:.59rem}#author-letter .letter-kicker{margin-top:1.5rem}#author-letter p,#author-letter li{font-size:.95rem;line-height:1.9}#author-letter .seal{width:48px;height:48px;flex-basis:48px}}