:root{
  --paper:#faf7f0; --card:#fffdf8; --ink:#2b2622; --muted:#8a7f6d;
  --red:#b03a2e; --red-soft:#f6e3df; --line:#e6ddcd; --gold:#b98a2f;
  --done:#3e7d4e;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--red)}
button{font-family:inherit;cursor:pointer}

.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 28px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:14px}
.seal{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:var(--red);color:#fff;font-family:"Noto Serif SC","Songti SC",serif;font-size:26px;font-weight:700;border-radius:8px;box-shadow:0 2px 8px rgba(176,58,46,.3)}
.seal.big{width:64px;height:64px;font-size:36px}
.brand h1{margin:0;font-family:"Noto Serif SC","Songti SC",serif;font-size:26px;letter-spacing:2px}
.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}
.top-actions{display:flex;align-items:center;gap:12px}
.ghost-btn{background:transparent;border:1px solid var(--line);border-radius:8px;padding:7px 14px;font-size:14px;color:var(--ink)}
.ghost-btn:hover{border-color:var(--red);color:var(--red)}
.primary-btn{background:var(--red);color:#fff;border:0;border-radius:8px;padding:10px 22px;font-size:15px}
.primary-btn:hover{background:#933025}
.primary-btn:disabled{opacity:.5;cursor:default}

main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:28px 20px 40px}
.intro{color:var(--muted);font-size:15px;line-height:1.7;margin:0 0 22px}
.section-title{font-family:"Noto Serif SC","Songti SC",serif;letter-spacing:2px;font-size:20px;margin:0 0 14px}

.shelf-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.set-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;text-align:left;width:100%;transition:border-color .15s,transform .15s}
.set-card:hover{border-color:var(--red);transform:translateY(-2px)}
.set-icon{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 8px;background:var(--red-soft);color:var(--red);border-radius:8px;font-family:"Noto Serif SC","Songti SC",serif;font-size:19px;font-weight:700;margin-bottom:10px}
.set-card h3{margin:0 0 4px;font-family:"Noto Serif SC","Songti SC",serif;font-size:21px;letter-spacing:1px}
.set-sub{color:var(--muted);font-size:13px;margin:0 0 12px}
.meta-row{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}
.best-tag{border:1px solid var(--gold);color:var(--gold);border-radius:20px;padding:2px 10px;font-weight:600}

.reader-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}
.reader-title{text-align:center;flex:1}
.reader-title h2{margin:0;font-family:"Noto Serif SC","Songti SC",serif;font-size:28px;letter-spacing:3px}
.reader-title p{margin:4px 0 0;color:var(--muted);font-size:13px}
.head-spacer{width:76px}

#stage{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:30px 28px 24px}
.play-row{display:flex;gap:12px;justify-content:center;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.play-btn{background:var(--red);color:#fff;border:0;border-radius:40px;padding:16px 44px;font-size:21px;letter-spacing:2px;box-shadow:0 3px 10px rgba(176,58,46,.3)}
.play-btn:hover{background:#933025}
.slow-btn{padding:10px 18px;font-size:15px;border-radius:24px}
.counters{display:flex;gap:22px;justify-content:center;color:var(--muted);font-size:13px;margin-bottom:20px;flex-wrap:wrap}
.score-line{color:var(--red);font-weight:700}

.input-row{display:flex;gap:10px}
#answer{flex:1;font-size:20px;padding:13px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);font-family:inherit;min-width:0}
#answer:focus{outline:none;border-color:var(--gold)}

.feedback{text-align:center;font-size:15px;min-height:22px;margin:16px 0 4px;color:var(--ink)}

.diff{display:flex;flex-wrap:wrap;gap:6px 2px;justify-content:center;margin:14px 0 6px}
.diff.words{gap:8px 10px}
.cell{display:inline-flex;flex-direction:column;align-items:center;min-width:34px;padding:4px 2px;border-radius:6px}
.diff.words .cell{min-width:0;padding:4px 6px}
.c-main{font-family:"Noto Serif SC","Songti SC",serif;font-size:27px;line-height:1.25}
.diff.words .c-main{font-family:Georgia,"Times New Roman",serif;font-size:21px}
.c-sub{font-size:12px;line-height:1.3;min-height:15px}
.cell.ok .c-main{color:var(--done)}
.cell.ok .c-sub{color:var(--done)}
.cell.wrong{background:var(--red-soft)}
.cell.wrong .c-main{color:var(--red)}
.cell.wrong .c-sub{color:var(--red);font-weight:700}
.cell.missing .c-main{color:#cfc4ae}
.cell.missing .c-sub{color:var(--red);font-weight:700}
.cell.extra .c-main{color:var(--red);text-decoration:line-through}
.cell.extra .c-sub{color:var(--muted)}

.info{margin:14px auto 0;max-width:560px;font-size:14px;line-height:1.9;color:#57503f}
.info-label{display:inline-block;min-width:44px;color:var(--gold);font-weight:700;font-size:12px;margin-right:8px}

.item-actions{display:flex;gap:12px;justify-content:center;margin-top:20px}

.summary-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:36px 32px;text-align:center}
.summary-card h2{font-family:"Noto Serif SC","Songti SC",serif;letter-spacing:4px;margin:16px 0 4px}
.overall{color:var(--muted);font-size:15px}
.overall strong{color:var(--red);font-size:26px}
.missed-title{font-family:"Noto Serif SC","Songti SC",serif;letter-spacing:2px;font-size:17px;margin:22px 0 10px;text-align:left}
.missed-list{text-align:left}
.missed-row{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin-bottom:8px;flex-wrap:wrap}
.missed-text{font-family:"Noto Serif SC","Songti SC",serif;font-size:17px}
.missed-extra{color:var(--muted);font-size:13px;flex:1}
.none-missed{color:var(--done);font-weight:600;text-align:center}
.done-actions{display:flex;gap:12px;justify-content:center;margin-top:22px}

footer{border-top:1px solid var(--line);padding:20px 28px;text-align:center;color:var(--muted);font-size:13px}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:center;align-items:center;margin-bottom:12px}
.foot-label{font-weight:600;color:var(--ink)}
.foot-links a{color:var(--muted);text-decoration:none}
.foot-links a:hover{color:var(--red);text-decoration:underline}

@media (max-width:560px){
  main{padding:20px 14px 32px}
  #stage{padding:22px 14px 18px}
  .play-btn{padding:14px 34px;font-size:19px}
  #answer{font-size:18px}
  .c-main{font-size:23px}
  .head-spacer{display:none}
  .input-row{flex-direction:column}
  .input-row .primary-btn{width:100%}
}