#hsk-grammar{scroll-margin-top:110px}.grammar-levels{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px;margin:24px 0}.grammar-level{background:#fffdf7;border:1px solid var(--line);padding:16px 10px;border-radius:10px;color:var(--ink);text-align:left}.grammar-level strong{display:block;font-size:19px}.grammar-level span{display:block;font-size:11px;color:var(--muted);margin-top:5px}.grammar-level.active,.grammar-lesson.active{border-color:var(--red);background:#f7e9e3}.grammar-toolbar{display:flex;flex-wrap:wrap;gap:15px;align-items:center}.grammar-toolbar label{font-size:13px}.grammar-toolbar input,.grammar-toolbar select{border:1px solid var(--line);background:#fffdf7;padding:9px;border-radius:7px;max-width:100%;font:inherit}.grammar-level-description{margin:25px 0}.grammar-layout{display:grid;grid-template-columns:minmax(230px,.8fr) minmax(0,1.8fr);gap:24px;align-items:start}.grammar-list{display:grid;gap:10px}.grammar-lesson{width:100%;background:#fffdf7;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:18px;text-align:left;overflow-wrap:anywhere}.grammar-lesson span,.grammar-lesson small{display:block;font-size:12px;color:var(--muted)}.grammar-lesson strong{display:block;margin:6px 0;font-size:17px}.grammar-panel{border:1px solid var(--line);padding:28px;background:#fffdf7;border-radius:14px;scroll-margin-top:105px;overflow-wrap:anywhere}.grammar-panel-head{display:flex;justify-content:space-between;gap:14px;align-items:start}.grammar-panel-head h3{font-size:25px;margin:8px 0}.grammar-panel h4{font-size:16px;margin:24px 0 8px}.grammar-pattern{padding:16px;background:var(--green);border-radius:8px}.grammar-example{padding:16px 0;border-bottom:1px solid var(--line)}.grammar-zh{font-size:25px;line-height:1.6}.grammar-pin{color:var(--red);font-size:16px}.grammar-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:15px 0}.grammar-options button{border:1px solid var(--line);border-radius:8px;padding:14px 8px;background:var(--paper);font-size:20px;color:var(--ink);overflow-wrap:anywhere}.grammar-options button:disabled{opacity:1}.grammar-options .correct{background:#e3edda;border-color:#56804b}.grammar-options .wrong{background:#f7deda;border-color:var(--red)}.grammar-question{font-size:22px}.grammar-panel textarea{display:block;width:100%;border:1px solid var(--line);border-radius:8px;padding:12px;background:var(--paper);font:inherit;resize:vertical;margin-top:6px}.grammar-bottom{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}#grammar-feedback{padding:5px 0;font-size:14px}@media(max-width:900px){.grammar-levels{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:760px){.grammar-layout{grid-template-columns:1fr}.grammar-list{grid-template-columns:repeat(2,minmax(0,1fr))}.grammar-panel{padding:20px}.grammar-levels{grid-template-columns:repeat(3,minmax(0,1fr))}.grammar-panel-head h3{font-size:23px}}@media(max-width:420px){.grammar-list{grid-template-columns:1fr}.grammar-options{grid-template-columns:1fr}.grammar-toolbar label{width:100%}.grammar-toolbar input{width:100%}}