:root{--paper:#f3f4f0;--ink:#20262a;--mute:#6b7378;--line:#d9dcd6;--accent:#4a6670;--soft:#e8ebe6}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);line-height:1.85;
 font-family:"Noto Serif TC","Source Han Serif TC","Songti TC","PMingLiU",Georgia,serif}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.top{display:flex;justify-content:space-between;align-items:baseline;max-width:1080px;margin:0 auto;padding:1.25rem 1.25rem 0}
.brand{text-decoration:none;font-size:1.05rem;letter-spacing:.15em}
.line-link{font-size:.9rem;color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent)}
.hero{max-width:1080px;margin:0 auto;padding:3.5rem 1.25rem 2.5rem}
.logo{margin:0;font-weight:500;font-size:clamp(2.2rem,9vw,4rem);letter-spacing:.22em;line-height:1.25;border-left:1px solid var(--ink);padding-left:1.2rem}
.nav{display:flex;gap:1.4rem;flex-wrap:wrap;justify-content:flex-end}
.vertical{writing-mode:vertical-rl;font-size:clamp(2.2rem,7vw,3.6rem);font-weight:500;letter-spacing:.3em;margin:0;line-height:1.2;border-left:1px solid var(--ink);padding-left:1.2rem}
main{max-width:1080px;margin:0 auto;padding:0 1.25rem 3rem}
.filters{display:flex;flex-wrap:wrap;gap:.75rem 1rem;align-items:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:.9rem 0}
input[type=search],select{font:inherit;font-size:.95rem;padding:.4rem .6rem;border:1px solid var(--line);background:transparent;color:var(--ink);border-radius:2px}
input[type=search]{flex:1 1 12rem;min-width:0}
.chk{font-size:.9rem;color:var(--mute);display:flex;gap:.4rem;align-items:center}
.muted{color:var(--mute);font-size:.9rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:2rem 1.4rem;margin-top:1rem}
.card{text-decoration:none;display:block}
.cover{aspect-ratio:3/4;background:var(--soft);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.cover img{width:100%;height:100%;object-fit:cover;display:block}
.cover .ph{padding:.8rem;text-align:center;font-size:.95rem;color:var(--mute);writing-mode:vertical-rl;letter-spacing:.15em;max-height:100%}
.card .t{margin:.6rem 0 0;font-size:1rem;line-height:1.5}
.card .a{margin:0;font-size:.85rem;color:var(--mute)}
.card .p{margin:.2rem 0 0;font-size:.9rem}
.card:hover .t{text-decoration:underline;text-underline-offset:4px}
.sold .cover img,.sold .cover .ph{opacity:.35}
.sold .cover::after{content:"已售出";position:absolute;right:0;bottom:0;background:var(--ink);color:var(--paper);font-size:.8rem;padding:.1rem .6rem}
.howto{margin-top:4rem;border-top:1px solid var(--line);padding-top:1.5rem;max-width:34em}
.howto h2{font-size:1.1rem;font-weight:500;letter-spacing:.15em;margin:0 0 .5rem}
.back{display:inline-block;margin:1.5rem 0 1rem;font-size:.9rem;color:var(--mute);text-decoration:none}
.book{display:grid;grid-template-columns:minmax(0,320px) 1fr;gap:2.5rem}
.book h1{font-size:1.7rem;font-weight:500;line-height:1.4;margin:0 0 .3rem}
.book dl{display:grid;grid-template-columns:5em 1fr;gap:.2rem 1rem;margin:1.2rem 0;font-size:.95rem}
.book dt{color:var(--mute)}.book dd{margin:0}
.price{font-size:1.4rem;margin:.5rem 0}
.desc{white-space:pre-line;max-width:34em}
.btn{display:inline-block;margin-top:1rem;padding:.7rem 1.6rem;background:var(--accent);color:#fff;text-decoration:none;border-radius:2px;letter-spacing:.1em}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.note{font-size:.85rem;color:var(--mute);margin-top:.8rem}
footer{border-top:1px solid var(--line);padding:1.5rem;text-align:center;font-size:.85rem;color:var(--mute)}
@media(max-width:700px){.book{grid-template-columns:1fr;gap:1.5rem}.hero{gap:1.5rem}}