:root{--bg:#fff;--surface:#f4f4f4;--ground:#f7f8fa;--ink:#111;--muted:#636875;--accent:#1a4be0;--accent-ink:#fff;--soft-blue:#eef2ff;--line:#dde1e8;--error:#b72b36;--success:#237344;--font:"Libre Franklin","PingFang SC","Microsoft YaHei",sans-serif;--step-small:13px;--step-body:16px;--step-lead:20px;--step-head:30px;--step-display:42px}
*{box-sizing:border-box}body{margin:0;background:var(--ground);color:var(--ink);font:var(--step-body)/1.6 var(--font);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed}a{color:inherit;text-decoration:none}button{border:0}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:600;letter-spacing:-.035em}h1{font-size:var(--step-display);line-height:1.2}h2{font-size:var(--step-lead);line-height:1.5}h3{font-size:var(--step-lead);line-height:1.5}p{overflow-wrap:anywhere}[hidden]{display:none!important}
.masthead{height:88px;padding:0 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;background:var(--bg)}.wordmark{font-size:27px;font-weight:750;letter-spacing:-1.4px;white-space:nowrap;line-height:1}.wordmark span{font-weight:400;color:var(--muted);margin-left:7px}.masthead nav{display:flex;align-self:stretch;gap:36px;margin-right:auto;margin-left:45px}.nav-link{position:relative;display:flex;align-items:center;background:none;color:var(--muted);font-size:var(--step-body);padding:0}.nav-link.active{color:var(--ink);font-weight:600}.nav-link.active:after{position:absolute;content:"";height:3px;bottom:0;left:0;right:0;background:var(--accent)}.header-end{display:flex;gap:20px;align-items:center}.internal-note{color:var(--muted);font-size:var(--step-small)}main{max-width:1376px;padding:48px;margin:auto}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}.page-heading h1{animation:rise-in .55s both}.page-heading p{color:var(--muted);margin-top:12px}.service-status{display:flex;align-items:center;gap:9px;font-size:var(--step-small);white-space:nowrap;margin-bottom:2px}.service-status span{width:7px;height:7px;background:var(--muted);border-radius:50%}.service-status.ready span{background:var(--success)}.service-status.offline span{background:var(--error)}
.conversion-layout{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:24px;align-items:start}.upload-panel,.settings-panel,.jobs-panel{background:var(--bg);border-radius:4px}.upload-panel{padding:28px;animation:rise-in .5s .06s both}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px}.panel-heading>span{font-size:var(--step-small);color:var(--muted)}.dropzone{background:var(--ground);border:2px dashed var(--line);min-height:284px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px 20px;transition:background .2s,border-color .2s}.dropzone.dragging{background:var(--soft-blue);border-color:var(--accent)}.upload-icon{color:var(--accent);margin-bottom:15px}.dropzone h3{font-size:var(--step-lead);margin-bottom:7px}.dropzone p{color:var(--muted);font-size:var(--step-small);margin-bottom:23px}.button{min-height:44px;padding:11px 20px;display:inline-flex;align-items:center;justify-content:center;gap:24px;border-radius:4px;font-size:var(--step-body);font-weight:500;line-height:1.4;transition:transform .18s,background .18s,opacity .18s;white-space:nowrap}.button:hover{transform:translateY(-1px)}.button:active{transform:translateY(1px)}.primary{color:var(--accent-ink);background:var(--accent)}.primary:hover{background:#1239ad}.primary:disabled{background:#e4e8f1;color:#5a6375;transform:none}.secondary{background:var(--bg);border:1px solid var(--line)}.secondary:hover{background:var(--soft-blue)}.sample-row{display:flex;justify-content:center;gap:8px;align-items:center;margin:18px 0 20px;font-size:var(--step-small);color:var(--muted)}.text-button{background:none;color:var(--accent);padding:4px 0;font-size:inherit;min-height:32px}.text-button:hover{color:#102e93}.upload-note{font-size:var(--step-small);color:var(--muted)}.file-list{padding:0;margin:0;list-style:none}.file-row{display:flex;align-items:center;gap:14px;background:var(--ground);padding:14px 16px;margin-bottom:8px;border-radius:4px;animation:rise-in .22s both}.file-kind{background:var(--soft-blue);color:var(--accent);width:47px;height:47px;display:flex;align-items:center;justify-content:center;font-size:var(--step-small);flex-shrink:0;font-weight:600}.file-info{min-width:0;flex:1}.file-name{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-info small{color:var(--muted);font-size:var(--step-small)}.icon-button{width:40px;height:40px;flex-shrink:0;background:var(--surface);color:var(--muted);border-radius:4px;font-size:25px;display:flex;align-items:center;justify-content:center}.icon-button:hover{background:#e9ebef;color:var(--ink)}.alpha-notice{padding:16px;background:#fff6df;margin:16px 0}.alpha-notice label{font-size:var(--step-small);display:flex;align-items:start;gap:8px}.alpha-notice input{margin-top:4px;accent-color:var(--accent)}.alpha-notice p{font-size:var(--step-small);margin-top:6px;color:#766036}
.settings-panel{padding:28px;animation:rise-in .5s .12s both}.settings-panel>h2{margin-bottom:24px}fieldset{border:0;padding:0;margin:0 0 24px;min-width:0}legend{font-size:var(--step-body);font-weight:500;margin-bottom:12px}.format-options{display:flex;gap:10px}.format-option{position:relative;border:1px solid var(--line);border-radius:4px;flex:1;min-width:0;padding:14px 12px;cursor:pointer;display:flex;justify-content:space-between;gap:6px}.format-option:has(input:checked){border-color:var(--accent);background:var(--soft-blue)}.format-option:has(input:disabled){opacity:.4;cursor:not-allowed}.format-option input,.profile-options input,.background-options input{position:absolute;opacity:0;width:1px;height:1px}.format-option:has(input:focus-visible),.profile-options label:has(input:focus-visible),.background-options label:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:3px}.format-option strong{display:block;font-size:var(--step-lead);font-weight:600;line-height:1.35}.format-option small{font-size:var(--step-small);color:var(--muted);display:block;margin-top:5px;white-space:nowrap}.radio-mark{width:14px;height:14px;border:1px solid var(--line);border-radius:50%;margin-top:6px;flex-shrink:0}.format-option:has(input:checked) .radio-mark{border:4px solid var(--accent);background:var(--bg)}.profile-options{display:flex;background:var(--surface);padding:4px;border-radius:4px;gap:2px}.profile-options label{position:relative;flex:1;cursor:pointer;text-align:center}.profile-options span{display:block;font-size:var(--step-small);padding:9px 3px;border-radius:3px;color:var(--muted)}.profile-options input:checked+span{background:var(--bg);color:var(--ink);font-weight:600}.field-help{font-size:var(--step-small);color:var(--muted);margin-top:10px;line-height:1.7}.advanced{margin:4px 0 24px}.advanced summary{list-style:none;display:flex;justify-content:space-between;cursor:pointer;font-size:var(--step-small);color:var(--muted);min-height:32px;align-items:center}.advanced summary::-webkit-details-marker{display:none}.advanced[open] summary span{transform:rotate(45deg)}.advanced-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.advanced-grid label{font-size:var(--step-small)}select{width:100%;padding:10px 7px;margin-top:7px;border:1px solid var(--line);border-radius:4px;background:var(--bg);font-size:var(--step-small);color:var(--ink)}.convert-button{width:100%;justify-content:space-between}.settings-note{font-size:var(--step-small);color:var(--muted);text-align:center;margin-top:12px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:40px 0 20px}.section-heading p{color:var(--muted);font-size:var(--step-small);margin-top:5px}.section-heading>.text-button{font-size:var(--step-small)}
.jobs-panel{padding:0 28px}.jobs-toolbar{padding:21px 0;display:flex;align-items:center;justify-content:space-between;gap:16px}.jobs-toolbar p{color:var(--muted);font-size:var(--step-small)}.job-filters{display:flex;gap:18px}.job-filters button{background:none;color:var(--muted);padding:6px 0;font-size:var(--step-small)}.job-filters .active{color:var(--accent);font-weight:600}.empty-state{text-align:center;padding:25px 20px 45px}.empty-symbol{font-size:var(--step-head);color:#8b95a5;display:block;margin-bottom:8px}.empty-state h3{font-size:var(--step-body);font-weight:500}.empty-state p{font-size:var(--step-small);color:var(--muted);margin-top:8px}.job-row{display:grid;grid-template-columns:minmax(140px,1.7fr) minmax(100px,.8fr) minmax(85px,.6fr) minmax(150px,1fr);gap:20px;align-items:center;padding:20px 0;border-top:1px solid #edf0f4;animation:rise-in .3s both}.job-identity{display:flex;align-items:center;gap:14px;min-width:0}.job-identity .file-info small{display:block;margin-top:2px}.job-format{font-size:var(--step-small);color:var(--muted)}.job-format strong{font-size:var(--step-body);font-weight:500;color:var(--ink);display:block;margin-bottom:2px}.job-state{font-size:var(--step-small)}.job-state.completed{color:var(--success)}.job-state.failed{color:var(--error)}.job-state.running{color:var(--accent)}.job-state.expired{color:var(--muted)}.job-state.running:before{content:"";display:inline-block;width:8px;height:8px;margin-right:6px;background:var(--accent);border-radius:50%;animation:pulse 1s infinite alternate}.job-actions{display:flex;justify-content:flex-end;gap:16px;flex-wrap:wrap;font-size:var(--step-small)}.job-error{grid-column:1/-1;color:var(--error);font-size:var(--step-small);background:#fff4f4;padding:10px 14px;overflow-wrap:anywhere}.batch-download{font-size:var(--step-small);color:var(--accent);display:block;text-align:right;padding:0 0 18px}.search-label{display:flex;gap:16px;align-items:center;font-size:var(--step-small);margin-bottom:20px}.search-label input{max-width:360px;flex:1;min-width:0;padding:11px 14px;background:var(--bg);border:1px solid var(--line);border-radius:4px}footer{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:var(--step-small);padding:34px 0 0;gap:16px}footer>span:first-child{font-weight:600;letter-spacing:-.4px}footer p{margin-right:auto;margin-left:15px}
dialog{border:0;border-radius:6px;padding:28px;color:var(--ink);background:var(--bg);max-width:calc(100vw - 32px);max-height:calc(100dvh - 48px);overscroll-behavior:contain}dialog::backdrop{background:#11182780}dialog[open]{animation:rise-in .2s both}.preview-dialog{width:850px}.dialog-heading{display:flex;justify-content:space-between;align-items:start;gap:20px;margin-bottom:20px}.dialog-heading h2{overflow-wrap:anywhere}.dialog-heading p{font-size:var(--step-small);color:var(--muted);margin-top:4px}.preview-controls{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px}.preview-tabs{display:flex;gap:20px}.preview-tabs button{background:none;color:var(--muted);padding:8px 0;font-size:var(--step-small)}.preview-tabs .active{color:var(--accent);font-weight:600}.background-options{display:flex;gap:5px;margin:0;background:var(--surface);padding:3px;border-radius:4px}.background-options legend{position:absolute;clip:rect(0,0,0,0);height:1px;width:1px;overflow:hidden}.background-options label{position:relative;cursor:pointer;font-size:var(--step-small)}.background-options span{display:block;padding:5px 9px;border-radius:3px}.background-options input:checked+span{background:var(--bg)}.preview-stage{height:400px;display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden;background-color:#ededed}.preview-stage.checker{background-image:url('/static/checker.svg');background-size:24px 24px}.preview-stage.dark{background:#202329}.preview-stage.light{background:#fff;border:1px solid var(--line)}.preview-stage>canvas,.preview-stage>img,.preview-stage>.svga-preview{max-width:100%;max-height:100%;object-fit:contain}.preview-stage>.svga-preview{position:relative;width:100%;height:100%}.preview-stage .preview-message{font-size:var(--step-small);color:var(--muted);padding:24px;background:var(--bg);margin:20px;text-align:center}.preview-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:20px}.preview-bottom p{font-size:var(--step-small);color:var(--muted)}.preview-bottom .button{flex-shrink:0}.help-dialog{width:640px}.help-copy h3{font-size:var(--step-body);margin:22px 0 8px}.help-copy p{font-size:var(--step-body);color:var(--muted);margin-bottom:12px}.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:12px 22px;font-size:var(--step-small);border-radius:4px;max-width:calc(100vw - 32px);z-index:10}
@keyframes rise-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{from{opacity:.4}to{opacity:1}}
@media(min-width:1600px){main{padding-top:56px}.dropzone{min-height:310px}}
@media(max-width:1100px){.masthead{padding:0 28px;gap:24px}.masthead nav{margin-left:20px;gap:24px}main{padding:36px 28px}.conversion-layout{grid-template-columns:minmax(0,1fr) 310px;gap:18px}.upload-panel,.settings-panel{padding:22px}.job-row{grid-template-columns:minmax(130px,1.5fr) 100px 90px 110px;gap:12px}.job-actions{gap:10px}.internal-note{display:none}}
@media(max-width:800px){:root{--step-display:34px}.masthead{height:76px;padding:0 24px}.wordmark{font-size:25px}.masthead nav{gap:22px;margin:0 0 0 auto}.header-end{display:none}.nav-link{font-size:var(--step-small)}main{padding:32px 24px}.conversion-layout{grid-template-columns:1fr}.settings-panel{padding:24px;display:grid;grid-template-columns:1fr 1fr;column-gap:28px;align-items:start}.settings-panel>h2{grid-column:1/-1;margin-bottom:18px}.settings-panel fieldset{margin-bottom:20px}.advanced{margin:0 0 20px;grid-column:1/-1}.convert-button,.settings-note{grid-column:1/-1}.jobs-panel{padding:0 22px}.job-row{grid-template-columns:minmax(130px,1fr) 110px 110px}.job-format{display:none}.job-actions{gap:12px}.preview-stage{height:350px}.page-heading{align-items:start}.service-status{margin-top:10px!important}.section-heading{margin-top:32px}}
@media(max-width:520px){:root{--step-display:30px}.masthead{height:70px;padding:0 18px;gap:16px}.wordmark{font-size:23px}.wordmark span{margin-left:5px}.masthead nav{gap:18px}.masthead #help-open{display:none}.header-end{gap:0}main{padding:28px 16px}.page-heading{display:block;margin-bottom:24px}.page-heading>div>p{font-size:var(--step-small);margin-top:10px}.service-status{font-size:var(--step-small)}.upload-panel{padding:20px}.panel-heading{margin-bottom:18px}.panel-heading>span{font-size:var(--step-small)}.dropzone{min-height:270px;padding:24px 14px}.dropzone h3{font-size:var(--step-lead)}.dropzone p{max-width:240px}.sample-row{flex-wrap:wrap;gap:4px}.settings-panel{display:block;padding:22px}.settings-panel>h2{margin-bottom:20px}.settings-panel fieldset{margin-bottom:24px}.advanced{margin-bottom:24px}.format-option{padding:14px}.jobs-toolbar{align-items:start;flex-direction:column;gap:8px;padding:16px 0}.job-filters{gap:24px}.jobs-panel{padding:0 18px}.job-row{grid-template-columns:minmax(0,1fr) auto;gap:8px 14px;padding:18px 0}.job-identity{grid-column:1;gap:10px}.job-identity .file-kind{width:40px;height:40px;font-size:var(--step-small)}.job-state{grid-column:2;grid-row:1}.job-actions{grid-column:1/-1;justify-content:flex-end}.job-error{padding:10px}.section-heading{gap:10px;align-items:start}.section-heading p{max-width:220px}.section-heading>.text-button{white-space:nowrap}.empty-state{padding:24px 4px 36px}.empty-state p{max-width:220px;margin:8px auto 0}footer{padding-top:28px;flex-wrap:wrap;gap:8px}footer p{order:3;margin:0;width:100%}footer>span:last-child{margin-left:auto}dialog{padding:20px;max-height:calc(100dvh - 24px)}.preview-controls{align-items:start;flex-direction:column;gap:10px}.preview-stage{height:300px}.preview-bottom{align-items:stretch;flex-direction:column;gap:12px}.preview-bottom .button{width:100%}.dialog-heading h2{font-size:var(--step-body)}.help-copy p{font-size:var(--step-small)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.preview-display{display:flex;align-items:center;gap:12px}.preview-display>select{width:112px;min-height:36px;margin:0;padding:6px 8px}.preview-stage>canvas,.preview-stage>img{object-fit:contain}
@media(max-width:520px){.preview-display{width:100%;justify-content:space-between;gap:8px}.job-row .job-format{display:block;grid-column:1;grid-row:2}.job-row .job-format strong{display:inline;font-size:var(--step-small);margin-right:8px}.job-row .job-actions{grid-column:2;grid-row:2;white-space:nowrap}.job-row .job-error{grid-row:3}.job-row .job-format>span{white-space:nowrap}}

.jobs-tools{display:flex;align-items:center;gap:24px}.clear-session{font-size:var(--step-small);color:var(--muted)}.clear-session:disabled{opacity:.5;cursor:not-allowed}
@media(max-width:520px){.jobs-tools{width:100%;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}.jobs-tools .job-filters{gap:18px}}