:root{color-scheme:light;--ink:#203c37;--muted:#62776e;--paper:#f6f3e9;--line:#d8dfd3;--accent:#d5e6ad;font-family:"Microsoft YaHei","PingFang SC",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}header,main,footer{max-width:1120px;margin:auto;padding:28px 32px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);font-size:12px;letter-spacing:1px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:700}main{display:grid;grid-template-columns:1fr 1.15fr;gap:54px;padding-top:64px}.intro{padding-top:12px}.eyebrow{font-size:12px;letter-spacing:3px;font-weight:700}h1{font-size:clamp(32px,4vw,52px);line-height:1.3;letter-spacing:-1px;margin:22px 0}.intro>p:not(.eyebrow){line-height:1.9;max-width:380px;color:var(--muted)}.text-link{display:inline-block;margin-top:18px;color:var(--ink);text-underline-offset:7px}.shelf-heading{display:flex;justify-content:space-between;align-items:center;gap:14px}h2{font-size:20px}.shelf-heading span,.muted{color:var(--muted);font-size:13px}.filters{display:flex;gap:8px;margin:12px 0 20px}button{font:inherit;cursor:pointer;color:var(--ink)}.filters button{border:1px solid var(--line);border-radius:22px;background:transparent;padding:8px 20px}.filters button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:white}button:focus-visible,a:focus-visible{outline:3px solid #7e944e;outline-offset:4px}.books{display:grid;gap:12px}.book{display:grid;grid-template-columns:56px 1fr auto;align-items:center;gap:15px;padding:16px;background:#fffdf6;border:1px solid var(--line);border-radius:14px}.book-number{display:grid;place-items:center;height:70px;background:var(--accent);border-radius:4px 10px 10px 4px;font:26px Georgia,serif}.book h3{margin:0 0 8px;font-size:17px}.book p{margin:0;color:var(--muted);font-size:12px;line-height:1.6}.save{border:1px solid var(--line);border-radius:8px;background:transparent;padding:8px 12px;font-size:12px}.save[aria-pressed=true]{background:var(--accent);border-color:var(--accent)}.feedback{min-height:22px;font-size:12px;color:var(--muted)}.status{grid-column:1/-1;display:flex;gap:22px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:22px;font-size:12px}.status span{color:var(--muted)}footer{display:flex;justify-content:space-between;gap:16px;font-size:11px;color:var(--muted)}code{font-family:monospace}.guide{display:block;max-width:800px;line-height:1.9}.guide h1{font-size:36px}.guide ol{padding-left:24px}.guide li{margin:14px 0}.guide .status{margin-top:40px}@media(max-width:720px){header,main,footer{padding:22px}header>span{display:none}main{grid-template-columns:1fr;gap:28px;padding-top:26px}h1{font-size:38px}.intro>p:not(.eyebrow){max-width:none}.book{gap:10px;padding:12px;grid-template-columns:42px 1fr auto}.book-number{height:62px}.status{gap:12px}footer{flex-direction:column;line-height:1.8}}