:root{--blue:#3565e8;--ink:#25354b;--muted:#798597;--line:#e7ecf2;--bg:#f3f6fa;--font:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 var(--font)}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #83a5ff;outline-offset:3px}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}[hidden]{display:none!important}.tiny{width:14px;height:14px}.down{transform:rotate(90deg)}
.rail{position:fixed;inset:0 auto 0 0;width:84px;background:#233650;color:#c2cfdf;display:flex;align-items:center;flex-direction:column;z-index:20}.brand-mark{width:48px;height:48px;margin:25px 0 37px;border-radius:14px;background:white;padding:4px;color:white;text-decoration:none;display:flex;align-items:center;justify-content:center;font:21px Georgia;letter-spacing:1px;box-shadow:0 5px 16px #0e234a33}.brand-mark img{display:block;width:100%;height:100%;object-fit:contain}.rail nav{display:flex;flex-direction:column;gap:16px;width:100%;align-items:center}.rail-button{width:62px;padding:11px 2px 9px;border:0;background:transparent;color:#c2cfdf;display:flex;gap:6px;flex-direction:column;align-items:center;border-radius:10px;font-size:11px}.rail-button svg{width:22px;height:22px}.rail-button.selected{color:white;background:#ffffff14;position:relative}.rail-button.selected:before{position:absolute;content:'';height:25px;width:3px;left:-11px;top:17px;background:#85a5ff;border-radius:0 3px 3px 0}.rail-button:hover{background:#ffffff12}.help-button{margin-top:auto}.rail-foot{font:12px/1.8 var(--font);opacity:.4;margin:28px 0;letter-spacing:2px}
.app-shell{margin-left:84px}.topbar{height:78px;background:white;border-bottom:1px solid var(--line);padding:0 40px;display:flex;justify-content:space-between;align-items:center}.wordmark{font-size:20px;font-weight:650;letter-spacing:1px}.wordmark span{font-weight:400;font-size:12px;color:#8b96a5;border-left:1px solid #dfe5ed;padding-left:18px;margin-left:16px;letter-spacing:.3px}.service-status{display:flex;align-items:center;gap:8px;font-size:12px;color:#6c798b}.service-status i{width:7px;height:7px;border-radius:50%;background:#a9b3bf}.service-status.ready i{background:#47a282;box-shadow:0 0 0 4px #47a28212}.service-status.error i{background:#d57459}
main{max-width:1580px;margin:auto;padding:32px 40px 0}.page-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:29px;gap:20px}.page-heading h1{font-size:29px;letter-spacing:1px;line-height:1.5;margin:0 0 6px;font-weight:630}.page-heading p{margin:0;color:#8090a3;font-size:13px}.text-button{display:inline-flex;gap:7px;align-items:center;background:transparent;border:0;font-size:12px;padding:8px 4px}.text-button:hover{color:var(--blue)}.example-button{color:#54719d;white-space:nowrap}.example-button>svg:first-child{width:17px;height:17px}
.workspace{display:grid;grid-template-columns:320px minmax(0,1fr);gap:25px;align-items:start}.controls{background:white;border:1px solid var(--line);border-radius:12px;overflow:hidden}.control-section{padding:21px 22px;border-bottom:1px solid var(--line)}h2{font-size:14px;font-weight:600;margin:0 0 19px;display:flex;align-items:center;gap:9px}.step-dot{background:#eef3ff;color:#5275cd;border-radius:50%;width:21px;height:21px;font:12px/21px var(--font);text-align:center}.drop-zone{display:flex;flex-direction:column;align-items:center;text-align:center;cursor:pointer;min-height:198px;border:1px dashed #c8d4e7;border-radius:8px;background:#f9fbff;padding:24px 8px 18px;transition:background .15s,border .15s}.drop-zone:hover,.drop-zone.dragging{background:#eef3ff;border-color:var(--blue)}.drop-zone.busy{pointer-events:none;opacity:.6}.upload-icon{color:#5e80df;background:#eaf0ff;width:45px;height:45px;display:grid;place-items:center;border-radius:12px;margin-bottom:15px}.upload-icon svg{width:22px;height:22px}.drop-zone strong{font-size:13px;font-weight:550;max-width:100%;overflow-wrap:anywhere}.drop-zone>span:not(.upload-icon){color:#8290a6;font-size:10px;margin-top:7px}.drop-zone small{font-size:10px;color:#99a4b3;margin-top:10px}.audio-file{display:flex;align-items:center;gap:10px}.file-icon{display:grid;place-items:center;color:#6582cf;width:36px;height:42px;background:#eff3fc;border-radius:7px;flex-shrink:0}.audio-file>div{min-width:0;flex:1}.audio-file strong{font-size:12px;display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.audio-file small{font-size:11px;color:var(--muted);display:block;margin-top:3px}.icon-button{background:transparent;border:0;width:30px;height:32px;display:grid;place-items:center;border-radius:6px;color:#8995a6}.icon-button:hover{background:#eef3fc;color:var(--blue)}.icon-button svg{width:17px;height:17px}.waveform{height:63px;margin:16px 0;position:relative;border-radius:4px;overflow:hidden;background:#f5f7fb}.waveform canvas{width:100%;height:100%;position:absolute;inset:0}.wave-selection{position:absolute;top:0;bottom:0;border-left:2px solid #7394ef;border-right:2px solid #7394ef;background:#3565e80b;pointer-events:none}.clip-fields{display:flex;align-items:center;gap:6px;font-size:11px;color:#8a96a5}.clip-fields label{color:#627187;font-size:10px;flex:1;min-width:0}.clip-fields input{width:100%;height:30px;margin-top:5px;border:1px solid #dde5ef;border-radius:5px;padding:4px 7px;font-size:12px;color:var(--ink)}.clip-fields>span{margin-top:20px}.clip-fields .unit{font-size:11px}.field-note{font-size:10px;color:#8b98aa;margin:8px 0 0;line-height:1.7}.preview-clip{display:flex;gap:6px;align-items:center;background:transparent;border:0;color:#5475c6;font-size:11px;padding:9px 0 0}.preview-clip svg{width:12px;height:12px}.field-label{display:block;font-size:11px;color:#758296;margin:15px 0 7px}.full-input,select{border:1px solid #e0e6ef;border-radius:6px;background:white;padding:9px 10px;color:#4c5b70;height:37px;max-width:100%}.full-input{width:100%;font-size:12px}.full-input::placeholder{color:#acb5c2}select{font-size:12px;cursor:pointer}#stem{width:100%}.switch-row{margin-top:15px;display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:11px;cursor:pointer}.switch-row small{display:block;font-size:10px;color:#99a4b3;margin-top:4px}.switch-row input{position:absolute;opacity:0;width:32px;height:20px;right:22px}.switch-row i{display:block;position:relative;background:#dce3ed;width:30px;height:17px;border-radius:20px;flex-shrink:0}.switch-row i:after{content:'';position:absolute;width:13px;height:13px;top:2px;left:2px;background:white;border-radius:50%;transition:transform .15s}.switch-row input:checked+i{background:var(--blue)}.switch-row input:checked+i:after{transform:translateX(13px)}.switch-row input:focus-visible+i{outline:3px solid #83a5ff;outline-offset:3px}.switch-row.disabled{opacity:.45;cursor:not-allowed}.advanced{margin-top:21px;border-top:1px solid #eef1f5;padding-top:14px}.advanced summary{list-style:none;cursor:pointer;display:flex;align-items:center;font-size:11px;color:#8090a2;gap:7px}.advanced summary::-webkit-details-marker{display:none}.advanced summary>svg:first-child{width:14px;height:14px}.advanced summary>svg:last-child{margin-left:auto;width:12px;height:12px;transition:transform .15s}.advanced[open] summary>svg:last-child{transform:rotate(90deg)}.advanced-body{padding-top:15px}.check-row{display:flex;align-items:center;gap:7px;font-size:11px;color:#6d7e94;margin-bottom:12px}.check-row input{accent-color:var(--blue);margin:0}.manual-rhythm{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:14px 0}.manual-rhythm label{font-size:10px;color:#8090a2}.manual-rhythm input,.manual-rhythm select{width:100%;margin-top:5px;border:1px solid #dfe6f0;padding:6px;border-radius:5px;height:31px;font-size:11px}.manual-rhythm .first-beat{grid-column:1/-1}.convert-area{padding:20px 22px 13px}.primary-button{background:var(--blue);border:0;border-radius:7px;width:100%;height:43px;display:flex;align-items:center;justify-content:center;gap:9px;color:white;font-size:13px;font-weight:550;box-shadow:0 4px 9px #3565e817}.primary-button:hover:enabled{background:#2b57d0}.primary-button:disabled{background:#e9eef8;color:#9eaec8;opacity:1;box-shadow:none}.primary-button svg{width:17px;height:17px}.convert-area p{font-size:10px;color:#9aa6b7;text-align:center;margin:12px 0 0}
.score-panel{min-width:0;background:white;border:1px solid var(--line);border-radius:12px;position:relative;overflow:hidden}.score-toolbar{height:61px;display:flex;align-items:center;justify-content:space-between;padding:0 23px;border-bottom:1px solid var(--line)}.score-tab{font-size:13px;display:flex;align-items:center;gap:8px;font-weight:550}.score-tab>svg{color:#7185a1;width:17px;height:17px}.badge{font-size:9px;color:#8594a9;border:1px solid #e4eaf1;background:#f8fafc;border-radius:4px;font-weight:400;padding:1px 5px;margin-left:3px}.badge.generated{background:#ebf6f1;border-color:#dcefe7;color:#458e72}.export-wrap{position:relative}.export-wrap>.text-button{font-size:11px;color:#7a889a}.export-wrap>.text-button>svg{width:15px;height:15px}.export-menu{position:absolute;right:0;top:37px;width:178px;background:white;border:1px solid #e0e7f0;padding:6px;border-radius:8px;box-shadow:0 12px 35px #2e476420;z-index:9}.export-menu button{display:block;width:100%;text-align:left;font-size:12px;background:transparent;border:0;padding:9px 10px;border-radius:4px}.export-menu button:hover:enabled{background:#f0f4fc;color:var(--blue)}.notation-options{display:flex;align-items:center;gap:15px;height:58px;padding:0 23px;background:#fcfdff;border-bottom:1px solid #eef1f6;font-size:11px;color:#8190a4}.notation-options label{display:flex;align-items:center;gap:8px;white-space:nowrap}.notation-options select{height:28px;padding:3px 22px 3px 7px;border-color:#e6ebf2;font-size:10px;max-width:155px}.notation-hint{margin-left:auto;font-size:10px;color:#a0aabb}.score-scroll{min-height:442px;max-height:620px;overflow-y:auto;background:#f9fbfd;padding:22px 24px 18px;scrollbar-width:thin;scrollbar-color:#d2dbe7 transparent}.score-paper{background:white;box-shadow:0 2px 10px #24354b08;border:1px solid #edf0f5;min-height:400px}.notation{width:100%;height:auto;display:block;stroke:none;fill:unset;user-select:none}.score-footnote{padding:13px 23px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #edf1f5;color:#99a5b4;font-size:10px}.score-footnote>span:first-child{display:flex;gap:7px;align-items:center}.small-dot{width:4px;height:4px;background:#9cabc0;border-radius:50%;flex-shrink:0}#bar-count{white-space:nowrap}.transport{height:91px;border-top:1px solid var(--line);display:flex;gap:16px;align-items:center;padding:18px 23px;background:#fcfdff}.play-main{width:39px;height:39px;border-radius:50%;display:grid;place-items:center;color:var(--blue);background:#edf2ff;border:0;flex-shrink:0}.play-main svg{width:16px;height:16px;fill:currentColor;stroke-width:1}.play-main:hover{background:#dfe9ff}.transport-main{flex:1;min-width:0}.transport-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px;gap:8px}.play-mode{display:flex;gap:13px}.play-mode button{padding:0;background:none;border:0;font-size:10px;color:#9aa6b7}.play-mode button.active{color:#5778c5}.play-time{font-size:10px;color:#8d99ab;font-variant-numeric:tabular-nums}.seek{width:100%;height:3px;display:block;margin:0;accent-color:var(--blue);cursor:pointer}.speed-control{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:9px;color:#9aa6b7;padding-left:3px}.speed-control select{border:0;background:transparent;padding:0;height:23px;color:#6980a5;font-size:11px}.page-footer{display:flex;justify-content:space-between;gap:20px;padding:23px 0 28px;font-size:10px;color:#9aa7b8}.page-footer>span:first-child{display:flex;align-items:center;gap:7px}.page-footer svg{width:13px;height:13px}
.job-progress{padding:19px 23px 15px;background:#f4f7ff;border-bottom:1px solid #e2eafb}.progress-copy{display:flex;gap:12px;align-items:center}.progress-copy>div{flex:1;min-width:0}.progress-copy strong{font-size:12px;font-weight:550;color:#4768b5}.progress-copy p{margin:4px 0 0;color:#8b9bbb;font-size:10px}.progress-copy button{color:#8596b2;font-size:11px}.spinner{height:20px;width:20px;border:2px solid #d6e2ff;border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite;flex-shrink:0}@keyframes spin{to{transform:rotate(360deg)}}.progress-stages{display:flex;gap:6px;margin-top:16px}.progress-stages span{height:3px;flex:1;border-radius:3px;background:#dfe7f8}.progress-stages span.complete{background:#6c8ee8}.progress-stages span.current{background:#a3b9ef}.error-message{padding:15px 23px;color:#a44e42;background:#fff3f0;border-bottom:1px solid #f4dcd6;font-size:12px;line-height:1.8;overflow-wrap:anywhere}.error-message a{color:#985145}.error-message button{background:none;border:0;color:#985145;text-decoration:underline;padding:0;font-size:11px}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#25354bea;color:white;padding:12px 22px;border-radius:8px;z-index:80;font-size:12px;max-width:90vw;box-shadow:0 6px 20px #22365020}
dialog{border:1px solid var(--line);border-radius:14px;padding:27px;width:min(550px,calc(100% - 30px));color:var(--ink);box-shadow:0 25px 100px #23365033;max-height:80vh}dialog::backdrop{background:#172c4966;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:start;border-bottom:1px solid var(--line);padding-bottom:20px;gap:15px}.dialog-heading h2{font-size:19px;margin:0}.dialog-heading p{margin:5px 0 0;font-size:12px;color:#8b98a9}.help-content{font-size:13px;line-height:1.9}.help-content h3{font-size:13px;margin:21px 0 6px}.help-content p{color:#718197;margin:13px 0}.help-content .muted{font-size:11px;background:#f5f7fa;padding:14px;border-radius:6px}.history-item{display:flex;align-items:center;gap:12px;width:100%;padding:16px 3px;border:0;border-bottom:1px solid var(--line);background:white;text-align:left}.history-item:hover{background:#f7f9ff}.history-item>svg{width:20px;height:20px;color:#8aa1ce}.history-item>div{flex:1;min-width:0}.history-item strong{display:block;font-weight:550;font-size:13px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.history-item small{font-size:10px;display:block;color:#97a4b5;margin-top:4px}.history-state{font-size:10px;color:#6d90bf;background:#f0f5fb;border-radius:4px;padding:3px 7px;white-space:nowrap}.history-state.done{color:#4c947b;background:#edf7f2}.history-empty{padding:40px 10px;text-align:center;color:#8b98aa;font-size:13px}.warning-notice{color:#ad7a3c}
.switch-row{position:relative}.switch-row input{right:0;top:50%;transform:translateY(-50%);margin:0;z-index:1;cursor:pointer}
@media(min-width:1600px){.workspace{grid-template-columns:345px minmax(0,1fr)}.score-scroll{max-height:730px;min-height:552px}.control-section{padding:25px}.convert-area{padding:23px 25px 20px}}
@media(max-width:1200px){main{padding:27px 25px 0}.topbar{padding:0 25px}.workspace{grid-template-columns:285px minmax(0,1fr);gap:18px}.control-section{padding:19px}.convert-area{padding:18px 19px}.notation-options{gap:10px;padding:0 17px}.notation-hint{display:none}.score-scroll{padding:18px 16px;min-height:450px}.score-toolbar{padding:0 18px}.transport{padding:18px;gap:12px}.score-footnote{padding:13px 18px}.wordmark span{font-size:11px}}
@media(max-width:950px){.rail{width:66px}.brand-mark{width:40px;height:40px;font-size:18px}.rail-button{width:50px;font-size:10px}.rail-button.selected:before{left:-8px}.app-shell{margin-left:66px}.workspace{grid-template-columns:260px minmax(0,1fr);gap:15px}main{padding:24px 20px 0}.topbar{height:69px;padding:0 20px}.page-heading h1{font-size:24px}.page-heading p{font-size:11px}.example-button{font-size:11px}.score-scroll{padding:13px 10px;min-height:450px}.notation-options{flex-wrap:wrap;height:auto;min-height:58px;gap:8px;padding:10px 14px}.notation-options select{max-width:110px}.notation-options label{gap:5px}.score-footnote{font-size:9px}.play-mode{gap:9px}.transport{gap:10px;padding:14px}.transport-top{align-items:start}.play-time{font-size:9px}.speed-control{display:none}.score-paper{min-height:420px}.service-status{font-size:10px}.wordmark span{display:none}}
@media(max-width:760px){.rail{position:static;flex-direction:row;width:100%;height:58px;padding:0 17px;gap:20px}.brand-mark{margin:0;width:34px;height:34px;border-radius:9px;font-size:16px}.rail nav{flex-direction:row;gap:4px;width:auto}.rail-button{width:auto;flex-direction:row;padding:9px;font-size:11px;gap:6px}.rail-button svg{width:17px;height:17px}.rail-button.selected:before{display:none}.help-button{margin:0 0 0 auto}.rail-foot{display:none}.app-shell{margin:0}.topbar{height:54px}.wordmark{font-size:17px}.service-status{font-size:10px}.page-heading{margin-bottom:22px;align-items:start;gap:10px}.page-heading h1{font-size:24px}.page-heading p{font-size:11px}.example-button{font-size:10px;margin-top:5px;gap:4px}.example-button .tiny{display:none}.workspace{grid-template-columns:1fr;gap:22px}.controls{display:grid;grid-template-columns:1fr 1fr}.control-section{padding:19px 17px}.upload-section{border-right:1px solid var(--line)}.control-section>h2{font-size:12px;margin-bottom:15px}.drop-zone{min-height:219px;padding:27px 8px}.drop-zone strong{font-size:11px}.drop-zone>span:not(.upload-icon){font-size:8px}.drop-zone small{font-size:9px}.convert-area{grid-column:1/-1;display:flex;align-items:center;gap:20px;padding:16px 18px}.primary-button{max-width:230px;flex:1}.convert-area p{margin:0;flex:1;font-size:10px}.score-scroll{min-height:0;max-height:620px;padding:18px}.score-paper{min-height:0}.score-footnote{font-size:10px}.page-footer{flex-direction:column;gap:8px;align-items:center}.notation-hint{display:block}.transport{height:85px;padding:17px 20px}.speed-control{display:flex}.notation-options{padding:12px 20px}.score-toolbar{height:56px}.score-scroll .notation{min-height:0}}
@media(max-width:480px){main{padding:23px 14px 0}.topbar{padding:0 16px}.page-heading{flex-wrap:wrap;gap:11px}.page-heading h1{font-size:25px}.example-button{padding:0;font-size:11px}.controls{display:block}.control-section{padding:20px}.upload-section{border-right:0}.drop-zone{min-height:178px;padding:22px}.drop-zone strong{font-size:13px}.drop-zone>span:not(.upload-icon){font-size:10px}.drop-zone small{font-size:10px}.control-section>h2{font-size:13px}.full-input,select{font-size:13px}.field-label,.switch-row,.check-row{font-size:12px}.convert-area{padding:18px 20px;display:block}.primary-button{max-width:none}.convert-area p{margin-top:12px}.score-scroll{padding:12px}.score-footnote{padding:12px 15px;align-items:start;font-size:9px}.score-footnote>span:first-child{align-items:start}.small-dot{margin-top:5px}.notation-hint{display:none}.notation-options{padding:11px 15px}.notation-options select{max-width:120px}.transport{padding:16px 15px}.score-toolbar{padding:0 16px}.play-time{font-size:10px}.speed-control{padding:0}.help-button span{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:2s!important;transition:none!important}}
@media print{body{background:white}.rail,.topbar,.page-heading,.controls,.score-toolbar,.notation-options,.job-progress,.error-message,.score-footnote,.transport,.page-footer,dialog,.toast{display:none!important}.app-shell{margin:0}main{padding:0;max-width:none}.workspace{display:block}.score-panel{border:0;border-radius:0;overflow:visible}.score-scroll{max-height:none;overflow:visible;padding:0;background:white;min-height:0}.score-paper{border:0;box-shadow:none}.notation{width:100%;height:auto;break-inside:auto}@page{size:A4;margin:12mm}}

.topbar-right{display:flex;align-items:center;gap:22px}.account-actions{display:flex;align-items:center;gap:12px;font-size:12px}.account-actions a{text-decoration:none}.account-link{border:0;background:none;color:#53657c;font:inherit;cursor:pointer}.account-register{color:#3565e8}.account-email{max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#53657c}.account-actions button:disabled{opacity:.5}@media(max-width:760px){.topbar-right{gap:12px}.account-email{max-width:100px}.service-status{display:none}}
.conversion-tools{display:contents}.auth-gate{padding:32px 25px;grid-column:1/-1}.auth-gate-note{display:block;color:var(--blue);font:46px Georgia;margin-bottom:20px}.auth-gate h2{font-size:23px;line-height:1.65;margin:0 0 16px;font-weight:600}.auth-gate p{font-size:13px;color:var(--muted);line-height:1.9;margin:0 0 28px}.auth-gate .primary-button{display:flex;text-decoration:none;align-items:center;justify-content:center;font-size:13px;max-width:none}.auth-gate-login{display:block;text-align:center;color:var(--blue);font-size:12px;text-decoration:none;margin:18px 0 30px}.auth-gate-home{font-size:12px;color:var(--muted);text-decoration:underline;text-underline-offset:4px}@media(max-width:760px){.auth-gate{padding:24px}.auth-gate-note{margin-bottom:8px}.auth-gate h2{font-size:22px}.auth-gate p{margin-bottom:20px}.auth-gate-login{margin-bottom:22px}}