.choice-quiz-nav{justify-content:space-between}.choice-quiz-nav #choiceNext{margin-left:auto}
.choice-mode{border:1px solid var(--line);background:white;padding:10px 16px;border-radius:9px;cursor:pointer}.choice-mode.active{background:var(--navy);border-color:var(--navy);color:white}.choice-toolbar #choiceStartAll{margin-left:auto}
.choice-feedback{display:none;margin-top:22px}.choice-feedback.show{display:block}.choice-answer-line{background:#eef5fb;border-radius:8px;padding:12px 15px;color:var(--ink)}.choice-answer-line>span{margin-left:18px}.choice-answer-line #choiceAnswerLetter{color:var(--green);font-size:18px}.choice-answer-line #choiceSelectedLetter.wrong{color:var(--red)}.choice-answer-line #choiceSelectedLetter.correct{color:var(--green)}.choice-analysis{padding:18px 4px 0}.choice-analysis h3{margin:0 0 9px;font-size:18px}.choice-analysis p{margin:0;line-height:1.85;color:#334657}.analysis-key{color:#df3e38;font-weight:800}
.choice-library-head{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;gap:16px;padding:14px 0 18px;background:var(--paper)}.choice-library-list{display:grid;gap:14px}.choice-library-item{display:grid;grid-template-columns:48px 1fr;gap:18px;padding:22px 24px;background:#fff;border:1px solid var(--line);border-radius:14px}.choice-library-item .library-number{display:grid;place-items:center;width:42px;height:42px;border-radius:10px;background:#edf1ef;font-weight:700}.choice-library-body small{color:var(--muted)}.choice-library-body h3{margin:9px 0 14px;line-height:1.65}.choice-library-options{display:grid;gap:7px}.choice-library-options p{margin:0;padding:9px 12px;border-radius:8px;background:#f7f9f8}.choice-library-options p b{display:inline-grid;place-items:center;width:27px;height:27px;margin-right:10px;border-radius:50%;background:#e9eeec}.choice-library-options p.is-answer{color:var(--green);background:#edf8f4;font-weight:700}.choice-library-answer{margin-top:14px;padding:11px 13px;border-radius:8px;background:#eef5fb}.choice-library-answer strong{color:var(--green)}.choice-library-analysis{padding:13px 4px 0;line-height:1.75}.choice-library-analysis b{color:var(--red)}@media(max-width:700px){.choice-library-item{grid-template-columns:1fr}.choice-library-head{align-items:center}.choice-library-item .library-number{width:36px;height:36px}}
.choice-library-figure{margin:12px 0 14px}.choice-library-figure img{display:block;max-width:min(100%,646px);max-height:420px;border:1px solid var(--line);border-radius:9px;object-fit:contain}
.mock-hint{margin-top:14px;color:var(--muted);font-size:13px}.choice-option.selected{border-color:#258fe8;background:#eef8ff}.choice-option.selected .choice-letter{background:#258fe8;color:#fff}
.operation-toolbar{display:flex;gap:10px;margin-bottom:14px}.operation-toolbar select{flex:1;min-width:0;border:1px solid var(--line);border-radius:9px;background:#fff;padding:11px}.operation-card{max-width:900px;margin:auto;padding:26px;background:#fff;border:1px solid var(--line);border-radius:14px}.operation-card h2{margin:14px 0 7px;font-size:22px}.operation-card h3{margin:23px 0 10px;font-size:16px}.operation-task{margin:0;color:#34495e;line-height:1.7}.operation-note{margin:12px 0 0;padding:11px 13px;border-radius:8px;background:#fff5e9;color:#a55e18;line-height:1.65;font-size:14px}.operation-progress{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-top:18px;padding:12px;border-radius:9px;background:#f1f6fa;color:var(--muted);font-size:13px}.operation-progress b{color:var(--ink);font-size:17px}.operation-selected,.operation-available{display:grid;gap:8px}.operation-step{display:flex;align-items:center;gap:11px;width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:#fff;text-align:left;cursor:pointer;color:var(--ink);line-height:1.55}.operation-step:hover{border-color:#76b8ea;background:#f7fbff}.operation-step.selected{border-color:#91cfbb;background:#eff9f4}.operation-step b{display:grid;place-items:center;flex:0 0 27px;height:27px;border-radius:50%;background:#2b9c79;color:#fff;font-size:13px}.operation-step em{margin-left:auto;color:var(--red);font-size:12px;font-style:normal}.operation-empty{margin:0;padding:15px;color:var(--muted);text-align:center;border:1px dashed var(--line);border-radius:9px}.operation-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.operation-result{margin-top:16px;padding:13px;border-radius:9px;font-weight:700}.operation-result.success{background:#edf8f4;color:#238467}.operation-result.warning{background:#fff2ed;color:#c65d3f}@media(max-width:700px){.operation-toolbar{position:sticky;top:0;z-index:15;margin:0 -14px 12px;padding:10px 14px;background:var(--paper)}.operation-toolbar .ghost{padding:8px 10px;font-size:13px}.operation-card{padding:18px 14px;border-radius:12px}.operation-card h2{font-size:19px}.operation-progress{align-items:flex-start;flex-direction:column;gap:3px}.operation-step{padding:11px 12px;font-size:15px}.operation-actions{display:grid;grid-template-columns:1fr 1fr}.operation-actions button{min-height:44px}}