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.bs-txt-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;display:flex}.bs-txt .bs-speeds{background:var(--bs-bg);border:1px solid var(--bs-line);border-radius:var(--bs-radius-pill,999px);gap:2px;padding:3px;display:inline-flex}.bs-txt .bs-speed{cursor:pointer;font-family:var(--bs-ui);color:var(--bs-ink-2);background:0 0;border:none;border-radius:999px;padding:6px 12px;font-size:12.5px;font-weight:700;transition:background .15s,color .15s,transform .15s}.bs-txt .bs-speed:active{transform:scale(.95)}.bs-txt .bs-speed.bs-on{background:var(--bs-green);color:#fff;box-shadow:var(--bs-shadow)}.bs-txt-play{border:1px solid var(--bs-green-100);color:var(--bs-green-700);font-family:var(--bs-ui);cursor:pointer;background:#fff;border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:700;transition:transform .15s,background .15s;display:inline-flex}.bs-txt-play:disabled{opacity:.45;cursor:default}.bs-txt-play:active:not(:disabled){transform:scale(.96)}.bs-txt-play.bs-on{background:var(--bs-green-50)}.bs-txt-hint{color:var(--bs-muted);margin-bottom:8px;font-size:12px}.bs-txt-reader-controls{flex-wrap:wrap;gap:8px;margin-bottom:10px;display:flex}.bs-txt-ctrl-btn{border:1px solid var(--bs-line);min-height:36px;font-family:var(--bs-ui);color:var(--bs-ink-2);cursor:pointer;background:#fff;border-radius:999px;padding:0 14px;font-size:13px;font-weight:800;transition:background .15s,color .15s,border-color .15s}.bs-txt-ctrl-btn--on{background:var(--bs-green-50);color:var(--bs-green-700);border-color:var(--bs-green-100)}.bs-txt-word{font-family:var(--bs-zh);color:var(--bs-ink);cursor:pointer;background:0 0;border:none;border-bottom:1px dashed #0000;margin:0;padding:0;font-size:21px;font-weight:600;line-height:1.35;transition:color .12s,border-color .12s}.bs-txt-word:hover,.bs-txt-word:active{color:var(--bs-green-800,#0f7338);border-bottom-color:var(--bs-green,#10b981)}.bs-word-tap-backdrop{z-index:10040;background:#0000001f;position:fixed;inset:0}.bs-word-tap-popover.bs-bichleg-sheet{z-index:10050;width:auto;max-width:min(360px,100vw - 16px);max-height:min(70vh,520px);box-shadow:var(--bs-shadow-lg,0 12px 40px #00000029);border:1px solid var(--bs-line,#e8e8e4);border-radius:14px;padding:16px;animation:none;position:fixed;overflow-y:auto}.bs-txt-body{background:var(--bs-bg);border:1px solid var(--bs-line);border-radius:var(--bs-radius-sm,14px);padding:18px;animation:.4s cubic-bezier(.2,.7,.2,1) both bs-fadeUp;position:relative;overflow:visible}.bs-txt-sentences{flex-direction:column;gap:18px;display:flex}.bs-txt-sentence{flex-direction:column;gap:8px;display:flex}.bs-txt-ruby-line{flex-wrap:wrap;align-items:flex-end;gap:2px 6px;line-height:1.15;display:flex}.bs-txt-unit{vertical-align:bottom;flex-direction:column;align-items:center;display:inline-flex}.bs-txt-py-above{color:var(--bs-muted);white-space:nowrap;text-align:center;min-height:14px;font-size:11px;font-weight:600;line-height:1.15}.bs-txt-py-above.bs-txt-py-empty{visibility:hidden}.bs-txt-zh-char{font-family:var(--bs-zh);color:var(--bs-ink);font-size:21px;font-weight:600;line-height:1.35}.bs-newword{font-family:var(--bs-zh);color:var(--bs-green-800,#0f7338);background:var(--bs-green-50);border:none;border-bottom:2px solid var(--bs-green);cursor:pointer;border-radius:5px;margin:0 1px;padding:0 2px;font-size:21px;font-weight:600;line-height:1.35;transition:background .12s}.bs-newword:active{background:var(--bs-green-100)}.bs-txt-mn-line{color:var(--bs-ink-2);border-left:3px solid var(--bs-green-100);padding-top:2px;padding-bottom:2px;padding-left:2px;font-size:14.5px;line-height:1.65}.bs-pop-back{z-index:20;position:fixed;inset:0}.bs-pop{z-index:21;border:1px solid var(--bs-green-100);text-align:center;pointer-events:auto;background:#fff;border-radius:12px;min-width:120px;max-width:min(240px,100% - 16px);padding:10px 13px;animation:.15s both bs-fadeUp;position:absolute;box-shadow:0 8px 24px #00000024}.bs-pop--above{transform:translate(-50%,calc(-100% - 10px))}.bs-pop--above:after{content:"";border-top:7px solid #fff;border-left:7px solid #0000;border-right:7px solid #0000;position:absolute;bottom:-7px;left:50%;transform:translate(-50%)}.bs-pop--below{transform:translate(-50%,10px)}.bs-pop--below:after{content:"";border-bottom:7px solid #fff;border-left:7px solid #0000;border-right:7px solid #0000;position:absolute;top:-7px;left:50%;transform:translate(-50%)}.bs-pop-zh{font-family:var(--bs-zh);color:var(--bs-ink);font-size:19px;font-weight:700}.bs-pop-py{color:var(--bs-muted);margin-top:2px;font-size:12.5px;font-weight:600}.bs-pop-mn{color:var(--bs-green-800,#0f7338);margin-top:4px;font-size:14px;font-weight:600}.bs-txt-toggles{flex-wrap:wrap;gap:8px;margin:14px 0 4px;display:flex}.bs-tg{border:1px solid var(--bs-line);color:var(--bs-ink-2);font-family:var(--bs-ui);cursor:pointer;background:#fff;border-radius:999px;padding:7px 13px;font-size:12.5px;font-weight:700;transition:background .15s,color .15s,border-color .15s}.bs-tg.bs-on{background:var(--bs-green-50);color:var(--bs-green-700);border-color:var(--bs-green-100)}.bs-txt-writing{background:var(--bs-amber-50);border-radius:var(--bs-radius-sm,14px);border:1px solid #f5d78e;margin-top:18px;padding:16px}.bs-txt-writing+.bs-txt-writing{margin-top:12px}.bs-txt-writing-zh{font-family:var(--bs-zh);color:var(--bs-ink);margin-top:12px;font-size:20px;font-weight:700;line-height:1.65}.bs-txt-writing-py{color:var(--bs-green-700);margin-top:8px;font-size:14px;line-height:1.5}.bs-txt-writing-mn{color:var(--bs-ink-2);margin-top:8px;font-size:14px;line-height:1.6}
.bs-mn-term{font:inherit;color:var(--bs-green-700,#0f7338);text-underline-offset:3px;cursor:pointer;background:0 0;border:none;border-radius:2px;margin:0;padding:0;-webkit-text-decoration:underline dotted;text-decoration:underline dotted;text-decoration-thickness:1.5px;display:inline}.bs-mn-term:hover,.bs-mn-term:focus-visible{color:var(--bs-green-800,#0b5c2d);background:var(--bs-green-50,#ecfdf3);outline:none}.bs-mn-term-popover{z-index:10050;width:auto;max-height:min(70vh,420px);box-shadow:var(--bs-shadow-lg,0 12px 40px #00000029);border:1px solid var(--bs-line,#e8e8e4);background:#fff;border-radius:12px;padding:14px 16px;position:fixed;overflow-y:auto}.bs-mn-term-popover-backdrop{z-index:10040;background:#0000001f;position:fixed;inset:0}.bs-mn-term-popover-title{color:var(--bs-ink);margin:0;font-size:17px;font-weight:800}.bs-mn-term-popover-desc{color:var(--bs-ink-2);margin:8px 0 0;font-size:14px;line-height:1.6}.bs-mn-term-popover-examples{background:var(--bs-bg);border:1px solid var(--bs-line);color:var(--bs-ink-2);border-radius:10px;margin:12px 0 0;padding:10px 12px 10px 28px;font-size:13px;line-height:1.55}.bs-mn-term-popover-examples li+li{margin-top:4px}.bs-mn-term-popover-close{width:100%;margin-top:12px}
.bs-pr-teacher{color:var(--bs-ink-2);text-align:center;margin:2px 0 14px;font-size:13.5px;line-height:1.55}.bs-pr .bs-speak.bs-lg.bs-on{background:var(--bs-green);color:#fff;border-color:var(--bs-green)}.bs-pr .bs-speeds{background:var(--bs-bg);border:1px solid var(--bs-line);border-radius:var(--bs-radius-pill,999px);gap:2px;margin:14px auto 0;padding:3px;display:inline-flex}.bs-pr .bs-speed{cursor:pointer;font-family:var(--bs-ui);color:var(--bs-ink-2);background:0 0;border:none;border-radius:999px;padding:6px 14px;font-size:12.5px;font-weight:700;transition:background .15s,color .15s,transform .15s}.bs-pr .bs-speed:active{transform:scale(.95)}.bs-pr .bs-speed.bs-on{background:var(--bs-green);color:#fff;box-shadow:var(--bs-shadow)}.bs-pr-tip{color:var(--bs-ink-2);background:var(--bs-amber-50);border:1px solid var(--bs-amber-100);border-radius:14px;align-items:flex-start;gap:9px;margin-top:16px;padding:13px 14px;font-size:13.5px;line-height:1.6;animation:.4s cubic-bezier(.2,.7,.2,1) both bs-fadeUp;display:flex}.bs-pr-tip-ic{flex:none;font-size:16px;line-height:1.3}
.bs-tov{flex-direction:column;gap:12px;margin-top:12px;display:flex}.bs-tov-section-title{color:var(--bs-muted);letter-spacing:.04em;text-transform:uppercase;margin:0 0 8px;font-size:12px;font-weight:700}.bs-tov-structure{border:1px solid var(--bs-line);background:#fff;border-radius:10px;padding:10px 12px}.bs-tov-structure-label{color:var(--bs-muted);margin-bottom:4px;font-size:11px;font-weight:700;display:block}.bs-tov-structure-code{color:var(--bs-ink);white-space:pre-wrap;font-family:ui-monospace,Cascadia Code,Segoe UI Mono,monospace;font-size:14px;font-weight:600;line-height:1.5;display:block}.bs-tov-notes{background:var(--bs-green-50,#ecfdf5);border:1px solid var(--bs-green-100,#d1fae5);border-radius:12px;align-items:flex-start;gap:10px;padding:12px 14px;display:flex}.bs-tov-notes-icon{flex:none;font-size:16px;line-height:1}.bs-tov-notes-title{color:var(--bs-green-800,#0f7338);margin:0 0 4px;font-size:11px;font-weight:700}.bs-tov-notes-body{color:var(--bs-ink-2);margin:0;font-size:14px;line-height:1.6}.bs-tov-mistakes-list{flex-direction:column;gap:10px;display:flex}.bs-tov-mistake{border:1px solid var(--bs-line);background:#fff;border-radius:12px;padding:10px 12px}.bs-tov-mistake-wrong,.bs-tov-mistake-right{align-items:flex-start;gap:8px;font-size:14px;line-height:1.45;display:flex}.bs-tov-mistake-wrong{color:#b91c1c;border-left:3px solid #ef4444;margin-bottom:6px;padding-left:8px}.bs-tov-mistake-right{color:#047857;border-left:3px solid #10b981;padding-left:8px}.bs-tov-mistake-tag{flex:none;font-size:13px}.bs-tov-mistake-why{color:var(--bs-muted);margin:8px 0 0;font-size:12px;line-height:1.5}.bs-tov-check-q{color:var(--bs-ink);margin:0 0 10px;font-size:14px;font-weight:600;line-height:1.5}.bs-tov-check-opts{flex-direction:column;gap:8px;display:flex}.bs-tov-check-opt{border:1px solid var(--bs-line);font-family:var(--bs-ui);color:var(--bs-ink);cursor:pointer;text-align:left;background:#fff;border-radius:10px;padding:10px 14px;font-size:14px;font-weight:600;transition:background .15s,border-color .15s}.bs-tov-check-opt:active:not(:disabled){transform:scale(.98)}.bs-tov-check-opt--ok{background:var(--bs-green-50,#ecfdf5);border-color:var(--bs-green,#10b981);color:var(--bs-green-800,#0f7338)}.bs-tov-check-opt--bad{color:#b91c1c;background:#fef2f2;border-color:#ef4444}.bs-tov-check-opt--reveal{background:var(--bs-green-50,#ecfdf5);border-color:var(--bs-green-100,#d1fae5)}.bs-tov-check-feedback{margin:10px 0 0;font-size:13px;font-weight:600}.bs-tov-check-feedback--ok{color:var(--bs-green-800,#0f7338)}.bs-tov-check-feedback--bad{color:#b91c1c}.bs-txt-sentence--noted{border-left:2px solid var(--bs-green,#10b981);margin-left:-2px;padding-left:10px}.bs-txt-note-toggle{font-family:var(--bs-ui);color:var(--bs-green-700,#047857);cursor:pointer;background:0 0;border:none;border-radius:6px;align-items:center;gap:4px;margin-top:6px;padding:2px 8px;font-size:12px;display:inline-flex}.bs-txt-note-toggle:hover{background:var(--bs-green-50,#ecfdf5)}.bs-txt-note-panel{background:var(--bs-green-50,#ecfdf5);border:1px solid var(--bs-green-100,#d1fae5);color:var(--bs-ink-2);border-radius:10px;margin-top:8px;padding:10px 12px;font-size:13px;line-height:1.55}.bs-txt-note-chips{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.bs-txt-note-chip{border:1px solid var(--bs-green-100,#d1fae5);font-family:var(--bs-zh);color:var(--bs-green-800,#0f7338);background:#fff;border-radius:999px;padding:3px 10px;font-size:13px;font-weight:600;display:inline-block}.bs-txt-footer-section{border-top:1px solid var(--bs-line);margin-top:16px;padding-top:14px}.bs-txt-footer-title{color:var(--bs-muted);letter-spacing:.04em;text-transform:uppercase;margin:0 0 10px;font-size:12px;font-weight:700}.bs-txt-summary-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.bs-txt-summary-item{color:var(--bs-ink-2);gap:10px;font-size:14px;line-height:1.55;display:flex}.bs-txt-summary-num{color:var(--bs-green-700,#047857);flex:none;min-width:1.5em;font-weight:700}.bs-txt-reflect-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.bs-txt-reflect-item{color:var(--bs-ink-2);border-left:2px solid var(--bs-green-100,#d1fae5);padding-left:12px;font-size:14px;line-height:1.55}