/* study.043022.xyz 公共样式：导航条 / 输入框 / 状态提示 */
:root{--sy-red:#8c2f2f;--sy-ink:#2b2b2b;--sy-line:#e3ded9}

/* ---------- 顶部导航 ---------- */
.sy-nav{
  background:#3a1f1f;color:#fff;display:flex;align-items:center;gap:6px;flex-wrap:wrap;
  padding:7px 12px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:12.5px;line-height:1.6;position:relative;z-index:60;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.sy-nav .sy-home{font-weight:700;color:#ffd98a;text-decoration:none;font-size:13px;margin-right:2px}
.sy-nav a{color:#f3e7e7;text-decoration:none;padding:3px 9px;border-radius:11px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);white-space:nowrap}
.sy-nav a:hover{background:rgba(255,255,255,.22);color:#fff}
.sy-nav a.on{background:#c9a56a;border-color:#c9a56a;color:#3a1f1f;font-weight:700}
.sy-nav .sy-back{margin-left:auto;cursor:pointer;font-family:inherit;font-size:12.5px;
  color:#f3e7e7;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);
  padding:3px 10px;border-radius:11px}
.sy-nav .sy-back:hover{background:rgba(255,255,255,.24)}
.sy-pill{font-size:11.5px;color:#cbb9b9;padding:2px 8px;border-radius:9px;white-space:nowrap}
.sy-pill.ok{color:#9fd8a8}
.sy-pill.err{color:#ffb3ab}
.sy-pill.busy{color:#ffd98a}

/* ---------- 底部导航 ---------- */
.sy-foot{
  max-width:920px;margin:34px auto 10px;padding:14px 16px 22px;border-top:1px dashed var(--sy-line);
  display:flex;gap:8px;flex-wrap:wrap;justify-content:center;align-items:center;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-size:13px;color:#7a736c;
}
.sy-foot a{color:var(--sy-red);text-decoration:none;border:1px solid #e0d6d0;background:#fff;
  padding:6px 13px;border-radius:16px}
.sy-foot a:hover{background:#f7efe9;border-color:var(--sy-red)}
.sy-foot .sep{opacity:.4}

/* ---------- 作答输入 ---------- */
textarea.ans{
  display:block;width:100%;resize:vertical;min-height:76px;box-sizing:border-box;
  border:1px solid #dcd6cf;border-radius:5px;background:#fffdfb;padding:9px 12px;margin-top:8px;
  font-family:inherit;font-size:15px;line-height:1.85;color:var(--sy-ink);
  transition:border-color .15s,box-shadow .15s;
}
textarea.ans:focus{outline:none;border-color:#c9a56a;box-shadow:0 0 0 3px rgba(201,165,106,.16);background:#fff}
textarea.ans.filled{border-color:#c9a56a;background:#fffef9}
textarea.ans::placeholder{color:#c3bcb4}

input.blank{
  display:inline-block;border:none;border-bottom:1.6px solid #c9a56a;background:#fffdf6;
  min-width:82px;width:7em;margin:0 2px;padding:1px 5px;font-family:inherit;font-size:15px;
  color:#8c2f2f;text-align:center;line-height:1.5;border-radius:3px 3px 0 0;
}
input.blank:focus{outline:none;background:#fff8e8;border-bottom-color:#8c2f2f}
input.blank.filled{background:#fff8e8;font-weight:600}

/* 真勾选框 */
input.anschk{
  appearance:none;-webkit-appearance:none;width:16px;height:16px;flex:0 0 16px;
  border:1.6px solid #a99f96;border-radius:3px;background:#fff;cursor:pointer;
  position:relative;vertical-align:-3px;margin-right:8px;transition:.12s;
}
input.anschk:hover{border-color:var(--sy-red)}
input.anschk:checked{background:var(--sy-red);border-color:var(--sy-red)}
input.anschk:checked::after{content:"✓";position:absolute;left:1px;top:-4px;color:#fff;font-size:14px;font-weight:700}
ul.check{list-style:none;padding-left:0;margin:10px 0}
ul.check li{padding:6px 0;border-bottom:1px solid #f0ebe6;display:flex;align-items:flex-start;gap:2px}
ul.check li:last-child{border-bottom:none}
ul.check li.done{color:#7a736c}
ul.check li.done>span:last-child,ul.check li.done{text-decoration:none}

/* 自评行 */
.selfeval{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:12px;font-size:14px}
.selfeval input[type=text]{width:60px;text-align:center;border:1px solid #dcd6cf;border-radius:4px;
  padding:4px 6px;font-family:inherit;font-size:14px;background:#fffdfb}
.selfeval input.wide{width:100%;min-width:220px;flex:1;text-align:left}

/* 打卡页备注 */
.note-in{width:100%;box-sizing:border-box;border:1px dashed #ddd6ce;border-radius:5px;background:#fdfbf8;
  padding:7px 10px;font-family:inherit;font-size:13px;color:#4b4b4b;margin-top:8px;resize:vertical}
.note-in:focus{outline:none;border-color:#c9a56a;background:#fff}

@media (max-width:520px){
  /* 手机端：单行横向滑动，不再折成三行 */
  .sy-nav{font-size:12px;gap:5px;padding:6px 8px;flex-wrap:nowrap;overflow-x:auto;
    -webkit-overflow-scrolling:touch;scrollbar-width:none}
  .sy-nav::-webkit-scrollbar{display:none}
  .sy-nav>*{flex:0 0 auto}
  .sy-nav a{padding:3px 8px}
  .sy-nav .sy-back{margin-left:0;order:-1}
  .sy-pill{margin-left:auto;padding-right:4px}
  .sy-foot{gap:6px;font-size:12.5px;padding:12px 12px 22px}
  .sy-foot a{padding:5px 10px}
  .selfeval span{width:100%}
}

/* ---------------- AI 老师批改 ---------------- */
.ai-bar{display:flex;align-items:center;gap:10px;margin:10px 0 0;flex-wrap:wrap}
.ai-run{font:inherit;font-size:13.5px;padding:7px 14px;border-radius:8px;cursor:pointer;
  border:1px solid #8c2f2f;background:#8c2f2f;color:#fff;letter-spacing:.5px}
.ai-run:hover{background:#7a2626}
.ai-run:disabled{opacity:.55;cursor:default}
.ai-hint{font-size:12px;color:#999}
.ai-out:empty{display:none}
.ai-out{margin-top:10px;border:1px solid #e8dcd8;border-radius:10px;background:#fffdfc;padding:14px 16px}
.ai-load,.ai-err{font-size:13.5px;color:#8c2f2f}
.ai-err{color:#a33}
.ai-head{display:flex;align-items:center;gap:14px;border-bottom:1px dashed #e8dcd8;padding-bottom:10px}
.ai-score{width:62px;height:62px;border-radius:50%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;color:#fff;flex:0 0 auto;background:#8c2f2f}
.ai-score.a{background:#2f7a4f}.ai-score.b{background:#2f6fb5}
.ai-score.c{background:#b5852f}.ai-score.d{background:#a33}
.ai-score b{font-size:21px;line-height:1}.ai-score i{font-size:11px;font-style:normal;opacity:.9}
.ai-sum b{font-size:15px}.ai-sum span{display:block;font-size:12px;color:#999;margin-top:3px}
.ai-dims{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;margin:12px 0}
.ai-dim .dl{display:flex;justify-content:space-between;font-size:12.5px;color:#444}
.ai-dim .dl em{font-style:normal;color:#999;font-size:11.5px}
.ai-dim .bar{height:5px;background:#eee;border-radius:3px;margin:4px 0}
.ai-dim .bar i{display:block;height:100%;border-radius:3px;background:#8c2f2f}
.ai-dim p{margin:2px 0 0;font-size:12px;color:#777;line-height:1.55}
.ai-block{margin-top:12px;font-size:13.5px}
.ai-block>b{display:block;margin-bottom:6px;color:#8c2f2f}
.ai-tb{width:100%;border-collapse:collapse;font-size:13px}
.ai-tb th,.ai-tb td{border:1px solid #eee2de;padding:5px 8px;text-align:left;vertical-align:top}
.ai-tb th{background:#faf4f2;font-weight:600;color:#666}
.ai-tb tr.ok td:nth-child(4){color:#2f7a4f}
.ai-tb tr.no td:nth-child(4){color:#a33}
.ai-tb .why{font-size:12px;color:#777}
.ai-issues{margin:0;padding-left:20px}
.ai-issues li{margin-bottom:7px;line-height:1.6}
.ai-issues code{background:#f6efe9;padding:1px 5px;border-radius:4px;font-size:12.5px}
.ai-issues .fix{color:#2f7a4f;font-size:12.5px}
.ai-demo{margin:4px 0 0;padding:9px 12px;background:#f7fbf7;border-left:3px solid #2f7a4f;
  border-radius:0 6px 6px 0;line-height:1.7}
.ai-next{margin-top:12px;padding:9px 12px;background:#fdf6f4;border-radius:8px;
  font-size:13px;color:#6b4a44;line-height:1.6}
@media (max-width:520px){
  .ai-dims{grid-template-columns:1fr}
  .ai-tb,.ai-tb tbody,.ai-tb tr,.ai-tb td{display:block;width:100%}
  .ai-tb tr:first-child{display:none}
  .ai-tb tr{border:1px solid #eee2de;border-radius:8px;padding:7px 10px;margin-bottom:8px}
  .ai-tb td{border:0;padding:2px 0;font-size:13px}
  .ai-tb td:before{content:attr(data-l);display:inline-block;min-width:4.2em;
    color:#999;font-size:12px;vertical-align:top}
  .ai-tb tr.ok td:nth-child(4):before,.ai-tb tr.no td:nth-child(4):before{color:#999}
}

@media print{
  .sy-nav,.sy-foot,.sy-pill{display:none!important}
  textarea.ans{border:1px solid #bbb;background:#fff!important;box-shadow:none;height:auto}
  input.blank{border-bottom:1px solid #999;background:#fff!important}
  input.anschk{border:1px solid #999}
  @page{margin:14mm}
}

/* ---------- 手机：导航横向滚动，避免挤出屏幕 ---------- */
@media (max-width:560px){
  .sy-nav{flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;gap:5px;padding:6px 8px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none}
  .sy-nav::-webkit-scrollbar{display:none}
  .sy-nav a{padding:3px 8px;font-size:12px}
  .sy-nav .sy-back{margin-left:6px;flex:0 0 auto}
  .sy-foot{gap:6px;font-size:12.5px}
}

/* ---------- 周日周测提醒条 ---------- */
.sy-sunday{
  background:linear-gradient(90deg,#fff4e3,#fdf9f2);border-bottom:1px solid #ecd9b8;
  padding:9px 14px;font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:13px;color:#7a5320;line-height:1.7;display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;
}
.sy-sunday b{color:#8c2f2f;font-size:13.5px}
.sy-sunday .sy-sunday-t{flex:1 1 260px;color:#8a7a62;font-size:12.5px}
.sy-sunday a{background:#8c2f2f;color:#fff;text-decoration:none;padding:4px 12px;border-radius:14px;
  font-size:12.5px;white-space:nowrap;font-weight:600}
.sy-sunday a:hover{background:#6d2222}