:root{color-scheme:light;--ink:#173d38;--muted:#58706b;--paper:#f5f8f6;--surface:#fff;--action:#176b50;--accent:#e5f3cb;--line:#dce5df;--error:#ac3831;--radius:20px;font-family:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.6}button,input,a{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}button,input{font:inherit}button,a{color:inherit}button{cursor:pointer}a{text-decoration:none}button{border:0}button:disabled{cursor:not-allowed}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--action);outline-offset:5px}button:active:not(:disabled),.button:active{filter:brightness(.92)}[hidden]{display:none!important}.shell{width:min(1120px,calc(100% - 64px));margin-inline:auto}.header{min-height:108px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;gap:13px;align-items:center;font-size:26px;line-height:1.2;font-weight:750;letter-spacing:1px}.brand-en{display:block;font-size:11px;font-weight:500;letter-spacing:0;color:var(--muted);margin-top:5px}.brand-mark{display:flex;gap:4px;align-items:center;justify-content:center;width:44px;height:44px;border-radius:14px;background:var(--action);color:white}.brand-mark i{display:block;width:4px;background:currentColor;border-radius:4px;height:15px}.brand-mark i:nth-child(2){height:27px}.brand-mark i:nth-child(3){height:21px}.brand-mark i:nth-child(4){height:11px}.help-link{font-size:14px;display:flex;align-items:center;gap:10px;min-height:48px}.help-link span{font-size:20px}.intro{padding:56px 0 42px;display:flex;justify-content:space-between;align-items:center;gap:32px}h1{font-size:46px;line-height:1.3;letter-spacing:-1.8px;margin:0 0 14px;font-weight:750}.intro p{margin:0;color:var(--muted);font-size:17px}.mobile-break{display:none}.format-art{display:flex;align-items:center;padding-right:30px}.source-labels{display:grid;gap:6px;transform:rotate(-7deg)}.source-labels span{font-size:11px;letter-spacing:1px;border:1px solid #c4d3cb;border-radius:5px;background:var(--surface);text-align:center;padding:2px 12px}.flow-line{height:1px;width:62px;background:#a7bcb1;position:relative;margin:0 16px}.flow-line:after{content:"";position:absolute;right:0;top:-3px;width:6px;height:6px;border-top:1px solid #a7bcb1;border-right:1px solid #a7bcb1;transform:rotate(45deg)}.mp3-stamp{background:var(--accent);width:88px;height:112px;border-radius:12px 28px 12px 12px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;transform:rotate(8deg)}.mp3-stamp strong{font-size:18px;letter-spacing:1px}.wave{display:flex;gap:4px;align-items:center;height:30px}.wave i{width:3px;height:12px;background:var(--action);border-radius:3px}.wave i:nth-child(2n){height:24px}.wave i:nth-child(4){height:34px}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 304px;gap:24px;align-items:start}.upload-panel,.queue-panel,.settings-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px;min-height:28px}.section-heading h2{margin:0;font-size:17px;font-weight:650}.step-hint{color:var(--muted);font-size:12px}.drop-zone{width:100%;border:1.5px dashed #9ebfaf;background:#f7fbf8;border-radius:12px;display:flex;align-items:center;flex-direction:column;padding:30px 16px 27px;color:var(--ink);transition:background .15s,border-color .15s}.drop-zone:hover,.drop-zone.dragging{background:#edf5ee;border-color:var(--action)}.upload-icon{height:52px;width:52px;margin-bottom:12px;background:#e5f0e8;border-radius:16px;display:grid;place-items:center;color:var(--action)}.upload-icon svg{width:29px;height:29px}.drop-zone strong{font-size:17px;font-weight:600}.drop-copy{font-size:13px;color:var(--muted);margin-top:5px}.choose-pill{background:var(--action);color:white;font-size:14px;margin-top:20px;min-height:44px;padding:10px 18px;border-radius:8px;display:flex;gap:24px;align-items:center}.choose-pill span{font-size:19px;line-height:1}.upload-limit{font-size:12px;color:var(--muted);text-align:center;margin:15px 0 0}.settings-panel{grid-column:2;grid-row:1 / span 2;padding:26px 24px}.output-tag{font-size:12px;background:var(--accent);padding:2px 10px;border-radius:5px;font-weight:650}fieldset{border:0;padding:0;margin:26px 0 0;min-width:0}legend{font-size:14px;display:flex;justify-content:space-between;width:100%;padding:0}legend span{font-size:12px;color:var(--muted)}.quality-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:13px}.quality{position:relative;cursor:pointer}.quality input{position:absolute;opacity:0;width:1px;height:1px}.quality>span{display:flex;flex-direction:column;padding:14px 10px;border:1px solid var(--line);border-radius:10px;text-align:center;transition:background .15s}.quality b{font-size:18px;font-weight:650}.quality small{font-size:11px;font-weight:500;color:var(--muted)}.quality em{font-size:12px;font-style:normal;color:var(--muted);margin-top:2px}.quality input:checked+span{border:1.5px solid var(--action);padding:13.5px 9.5px;background:#eff7ef}.quality input:focus-visible+span{outline:3px solid var(--action);outline-offset:3px}.quality-note{font-size:12px;color:var(--muted);line-height:1.75;margin:15px 0 23px}.output-detail{border-top:1px solid var(--line);padding-top:17px;display:grid;gap:8px;font-size:12px;color:var(--muted)}.output-detail span{display:flex;justify-content:space-between}.output-detail b{color:var(--ink);font-weight:500}.privacy-note{display:flex;gap:9px;color:var(--muted);padding-top:22px;margin-top:22px;border-top:1px solid var(--line);align-items:flex-start}.privacy-note svg{flex:none;width:19px;height:22px;margin-top:2px}.privacy-note p{font-size:12px;margin:0;line-height:1.8}.queue-panel{grid-column:1;min-width:0;padding-bottom:20px}.queue-heading{margin-bottom:0}.queue-heading h2 span{display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:500;background:var(--paper);border-radius:6px;min-width:23px;margin-left:8px;padding:1px 5px}.text-button{background:none;color:var(--muted);font-size:13px;min-height:44px;padding:0 0 0 12px}.text-button:disabled{opacity:.5}.queue-summary{font-size:12px;color:var(--muted);margin:0 0 12px;min-height:20px}.empty{padding:25px 10px 30px;text-align:center;color:var(--muted)}.empty svg{width:48px;height:48px;color:#8aab9c}.empty p{font-size:14px;margin:14px 0 3px;color:var(--ink)}.empty span{font-size:12px}.file-list{list-style:none;padding:0;margin:0}.file-row{display:grid;grid-template-columns:42px minmax(0,1fr) auto;gap:13px;padding:19px 0;border-top:1px solid var(--line);align-items:start}.file-icon{height:46px;background:#f0f4ef;border-radius:9px;display:grid;place-items:center;font-size:10px;font-weight:650;color:var(--action);text-transform:uppercase}.file-content{min-width:0}.file-name{font-weight:550;font-size:14px;overflow-wrap:anywhere;margin:0;line-height:1.55}.file-meta{font-size:11px;color:var(--muted);margin-top:3px}.file-status{font-size:12px;color:var(--muted);margin-top:8px;overflow-wrap:anywhere}.file-status.done{color:var(--action)}.file-status.error{color:var(--error)}.progress{height:4px;background:#e6eee8;border-radius:4px;overflow:hidden;margin-top:10px}.progress-bar{height:100%;background:var(--action);width:0;transition:width .2s}.file-actions{display:flex;gap:4px;align-items:center}.icon-button{display:grid;place-items:center;width:44px;height:44px;border-radius:8px;background:none;color:var(--muted)}.icon-button:hover{background:var(--paper)}.icon-button svg{width:18px;height:18px}.file-download{font-size:12px;color:var(--action);min-height:44px;padding:10px 5px;display:flex;align-items:center}.retry{font-size:12px;color:var(--action);min-height:44px;background:none;padding:0 5px}.audio-wrap{grid-column:2 / -1;margin-top:2px}audio{width:100%;height:34px;display:block}.download-row{border-top:1px solid var(--line);margin-top:8px;padding-top:20px;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px;color:var(--muted)}.button{min-height:48px;padding:12px 20px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:18px;font-size:14px;font-weight:550;line-height:1.5;transition:background .15s}.secondary{border:1px solid #bed1c4;color:var(--action);background:#f4f9f4;white-space:nowrap}.primary{background:var(--action);color:white;min-width:224px;min-height:54px;font-size:16px}.primary:hover:not(:disabled){background:#11583f}.primary:disabled{background:#dde6df;color:#667a70}.primary svg{width:21px;height:21px}.action-dock{position:fixed;bottom:0;left:0;right:0;background:rgba(255,255,255,.97);border-top:1px solid var(--line);z-index:5;padding:16px 0 calc(16px + env(safe-area-inset-bottom))}.dock-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}.dock-info{display:flex;flex-direction:column;gap:3px}.dock-info strong{font-size:14px;font-weight:600}.dock-info span{font-size:12px;color:var(--muted)}.help{padding:46px 0 0;scroll-margin-top:24px}.help h2{font-size:22px;margin:0 0 24px;letter-spacing:-.5px}.help-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-bottom:30px}.help h3{font-size:14px;font-weight:650;margin:0 0 8px}.help p{color:var(--muted);font-size:13px;line-height:1.85;margin:7px 0 15px}.help-grid p{margin:0}details{border-top:1px solid var(--line)}summary{padding:16px 0;cursor:pointer;font-size:14px;min-height:56px}summary span{color:var(--muted);font-size:12px;margin-left:14px}.format-chips{display:flex;gap:8px;flex-wrap:wrap;padding:5px 0 10px}.format-chips span{border:1px solid var(--line);border-radius:5px;font-size:12px;padding:3px 9px;background:var(--surface)}.footer{margin-top:32px;padding:24px 0 132px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;font-size:11px;color:var(--muted)}.footer-dot{margin:0 9px}.notice{border:1px solid #dfc582;color:#70521c;background:#fff9e7;border-radius:10px;padding:13px 16px;font-size:14px;margin-bottom:20px;overflow-wrap:anywhere}.notice.good{border-color:#b3cfbb;background:#edf7ee;color:var(--action)}.visually-hidden,.skip:not(:focus){position:absolute;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;width:1px;height:1px;padding:0;border:0}.skip:focus{position:fixed;top:10px;left:10px;z-index:10;background:white;padding:15px}
@media(max-width:900px){.shell{width:calc(100% - 40px)}.workbench{grid-template-columns:minmax(0,1fr) 270px;gap:18px}.upload-panel,.queue-panel{padding:22px}.settings-panel{padding:22px 18px}.format-art{padding-right:0}h1{font-size:38px}.flow-line{width:32px}.help-grid{gap:22px}}
@media(max-width:680px){.shell{width:calc(100% - 32px)}.header{min-height:82px}.brand{font-size:23px;gap:11px}.brand-mark{width:40px;height:40px;border-radius:12px}.brand-en{font-size:10px}.help-link{font-size:12px}.intro{padding:30px 0 28px;gap:16px;align-items:center}h1{font-size:33px;letter-spacing:-1.2px;line-height:1.35;margin-bottom:12px}.mobile-break{display:block}.intro p{font-size:13px;max-width:220px;line-height:1.8}.format-art{flex:none;gap:0;margin-right:5px}.source-labels{display:none}.flow-line{display:none}.mp3-stamp{width:65px;height:88px;border-radius:10px 23px 10px 10px;gap:7px}.mp3-stamp strong{font-size:15px}.wave{gap:3px;transform:scale(.8)}.workbench{display:flex;flex-direction:column;gap:16px}.upload-panel,.queue-panel,.settings-panel{width:100%;padding:20px}.section-heading{margin-bottom:16px}.section-heading h2{font-size:16px}.drop-zone{padding:24px 12px}.drop-zone strong{font-size:16px}.drop-copy{font-size:12px}.upload-limit{font-size:10px;line-height:1.8;margin-top:12px}.settings-panel .section-heading{margin-bottom:0}fieldset{margin-top:18px}.quality-grid{grid-template-columns:repeat(4,1fr);gap:6px;margin-top:10px}.quality>span{padding:12px 3px}.quality b{font-size:16px}.quality small{display:block;font-size:10px;margin-top:-3px}.quality em{font-size:10px;margin-top:4px}.quality input:checked+span{padding:11.5px 2.5px}.quality-note{font-size:11px;margin:12px 0 0}.output-detail,.privacy-note{display:none}.queue-heading{margin-bottom:0}.queue-summary{margin-bottom:8px}.file-row{gap:10px;grid-template-columns:35px minmax(0,1fr) auto}.file-icon{height:42px;font-size:9px}.file-name{font-size:13px}.file-actions{gap:0}.file-download{font-size:11px}.icon-button{width:40px;min-height:44px}.file-meta{font-size:10px}.empty{padding:22px 0 25px}.empty p{font-size:13px}.download-row{align-items:center;font-size:11px}.secondary{font-size:12px;padding:11px 14px}.help{padding-top:32px}.help h2{font-size:20px;margin-bottom:18px}.help-grid{grid-template-columns:1fr;gap:18px;margin-bottom:24px}.help-grid h3{margin-bottom:4px}.help p{font-size:12px}.footer{margin-top:20px;padding-bottom:126px;flex-direction:column;gap:6px}.action-dock{padding:12px 0 calc(12px + env(safe-area-inset-bottom))}.dock-inner{gap:12px}.dock-info{min-width:0;gap:2px}.dock-info strong{font-size:12px}.dock-info span{font-size:10px}.primary{min-width:152px;min-height:50px;padding:12px 15px;gap:12px;font-size:14px}.primary svg{width:18px}.notice{font-size:12px;margin-bottom:16px}.file-status{font-size:11px}.audio-wrap{grid-column:1 / -1}}
@media(max-width:359px){.shell{width:calc(100% - 24px)}h1{font-size:30px}.mp3-stamp{width:54px;height:78px}.upload-panel,.settings-panel,.queue-panel{padding:16px}.dock-info span{display:none}.primary{min-width:145px}.file-actions{flex-direction:column}.file-row{grid-template-columns:30px minmax(0,1fr) 42px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media(max-width:680px){.privacy-note{display:flex;padding-top:14px;margin-top:16px}.privacy-note p{font-size:11px;line-height:1.7}}
.brand{min-height:44px}.file-download{min-width:44px;justify-content:center}
@media(max-width:680px){.icon-button{width:44px}}
.source-tabs{display:flex;border-bottom:1px solid var(--line);gap:24px;margin:-3px 0 22px}.source-tabs button{min-height:46px;background:none;padding:7px 3px 12px;color:var(--muted);font-size:14px;border-bottom:2px solid transparent}.source-tabs button[aria-selected=true]{color:var(--action);font-weight:650;border-bottom-color:var(--action)}.link-label{display:block;font-size:14px;margin:0 0 10px;font-weight:550}#link-input{display:block;resize:vertical;min-height:132px;width:100%;padding:13px 14px;border:1px solid #b4c8bd;border-radius:10px;background:#f9fbf9;color:var(--ink);font:inherit;font-size:16px;line-height:1.7;overflow-wrap:anywhere}#link-input:focus-visible{outline:2px solid var(--action);outline-offset:2px}#link-input::placeholder{color:#657c72;font-size:13px}.link-hint,.link-footnote{font-size:12px;line-height:1.8;color:var(--muted)}.link-hint{margin:12px 0 17px}.link-footnote{border-top:1px solid var(--line);padding-top:14px;margin:18px 0 0}.link-form-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.link-form-actions>span{font-size:12px;color:var(--muted)}.file-status.downloading{color:var(--action)}
@media(max-width:680px){.source-tabs{margin-bottom:20px;gap:22px}.link-hint,.link-footnote{font-size:11px}.link-form-actions>span{font-size:11px}.link-form-actions .button{font-size:12px;padding-inline:14px}}