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8mm;border:0;border-top:1px solid #b8b8b8;background:repeating-linear-gradient(90deg,#b8b8b8 0 1px,transparent 1px 8mm)}.pb-space[data-style=grid] .pb-sl:last-child{border-bottom:1px solid #b8b8b8}.pb-space[data-style=tian] .pb-sl{--pb-pitch: 12mm;border:0;margin-bottom:1.5mm;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><rect x='0.75' y='0.75' width='118.5' height='118.5' fill='none' stroke='%23d64545' stroke-width='1.5'/><path d='M60 0V120M0 60H120' stroke='%23eba4a4' stroke-width='1' stroke-dasharray='5 4'/></svg>") left / 12mm 12mm repeat-x}.pb-space[data-style=pinyin] .pb-sl{--pb-pitch: 10mm;border:0;margin-bottom:2mm;background:linear-gradient(#6b9bd1,#6b9bd1) 0 0 / 100% 1px no-repeat,linear-gradient(#a9c4e6,#a9c4e6) 0 33.3% / 100% 1px no-repeat,linear-gradient(#a9c4e6,#a9c4e6) 0 66.6% / 100% 1px no-repeat,linear-gradient(#6b9bd1,#6b9bd1) 0 100% / 100% 1px no-repeat}.pb-space[data-style=english] .pb-sl{--pb-pitch: 9mm;border:0;margin-bottom:3mm;background:linear-gradient(#8a8a8a,#8a8a8a) 0 0 / 100% 1px no-repeat,linear-gradient(#8a8a8a,#8a8a8a) 0 33.3% / 100% 1px no-repeat,linear-gradient(#d14b4b,#d14b4b) 0 66.6% / 100% 1px no-repeat,linear-gradient(#8a8a8a,#8a8a8a) 0 100% / 100% 1px no-repeat}.pb-space[data-style=essay] .pb-sl{--pb-pitch: 9.5mm;border:0;background:linear-gradient(#c97b7b,#c97b7b) 0 0 / 100% 1px no-repeat,linear-gradient(#c97b7b,#c97b7b) 0 8mm / 100% 1px no-repeat,repeating-linear-gradient(90deg,#c97b7b 0 1px,transparent 1px 8mm) 0 0 / 100% 8mm no-repeat}.pb-key-title{font-family:var(--pb-heading);font-weight:700;font-size:1.25em;text-align:center;margin:.4em 0 .5em}.pb-key{margin:.15em 0}.pb-key-a,.pb-key-part{margin-right:.8em}.pb-key-e{margin-left:1.6em;font-size:.95em}.pb-sheet{border:1.5px solid #222;padding:2.5mm 3.5mm;margin-bottom:3mm}.pb-sheet-head{text-align:center}.pb-sheet-title{font-family:var(--pb-heading);font-size:1.45em;font-weight:700;letter-spacing:.15em}.pb-sheet-info{display:flex;justify-content:center;gap:2em;margin:2mm 0}.pb-sheet-note{font-size:.85em}.pb-sheet-h{font-family:var(--pb-heading);font-weight:700;margin-bottom:1.5mm}.pb-bubbles{display:grid;grid-template-columns:repeat(auto-fill,minmax(44mm,1fr));gap:1.8mm 4mm}.pb-bubble-row{display:flex;align-items:center;gap:1.6mm}.pb-bubble-n{min-width:6mm;text-align:right;font-weight:700}.pb-bubble{font-style:normal;display:inline-block;width:7mm;height:3.8mm;border:1px solid #d0333b;border-radius:1mm;font-size:2.6mm;line-height:3.4mm;text-align:center;color:#d0333b}.pb-fill-row{display:flex;align-items:flex-end;gap:2mm;height:9mm}.pb-fill-line{flex:1;border-bottom:1px solid #333}.pb-sheet-boxh{font-weight:700}.pb-sheet-open 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audio.pb-media-play{width:46mm;height:9mm;align-self:center}.pb-media-icon{display:grid;place-items:center;width:20mm;background:var(--pb-primary);color:#fff;font-family:var(--pb-heading);font-size:10pt;font-weight:700}.pb-media-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:1mm;color:color-mix(in srgb,var(--pb-ink) 70%,#ffffff)}.pb-media-title{color:var(--pb-ink);font-family:var(--pb-heading);font-size:10.5pt;font-weight:700;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.pb-media-qr{flex:none;width:20mm;height:20mm}.pb-media-qr svg{display:block;width:100%;height:100%}.pb-media[data-pending]{border-style:dashed}.pb-media-open{position:absolute;inset:0;border:0;background:transparent;cursor:pointer}.pb-mode-edit .pb-page{margin:0 auto 28px;box-shadow:0 1px 3px #0000001f,0 10px 28px #00000014}.pb-mode-edit .pb-seg:hover{outline:1px dashed rgba(184,50,122,.55);outline-offset:1px}.pb-mode-edit .pb-seg 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