:root{--paper:#f6f3eb;--ink:#293e36;--muted:#66736b;--green:#284f45;--line:#d9ded3;--white:#fffef9;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-family:var(--sans);color:var(--ink);background:var(--paper);font-synthesis:none;color-scheme:light}
*{box-sizing:border-box}body{margin:0}button,input,a,summary{-webkit-tap-highlight-color:transparent}button,summary{touch-action:manipulation}button{font:inherit;cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #b78252;outline-offset:4px}a{color:inherit;text-decoration:none}.wrap{max-width:820px;margin:auto;padding:0 28px}.site-header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:22px;font-weight:600;letter-spacing:1px}nav{display:flex;gap:19px}.nav-button{border:0;background:none;min-height:44px;padding:0 4px;font-size:14px}main{padding-top:27px!important;padding-bottom:35px!important}.section-label{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:14px}.listening-card,.reading-card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:30px}.lesson-meta{font-size:12px;display:flex;gap:13px;color:var(--muted);margin-bottom:12px}.lesson-meta>span+span:before{content:"·";margin-right:13px}h1{font-size:29px;font-weight:500;line-height:1.5;margin:0 0 5px}.english-title{font:italic 18px/1.6 Georgia,serif;color:var(--muted);margin:0}.timeline{margin:28px 0 15px}input[type=range]{appearance:none;-webkit-appearance:none;width:100%;height:20px;background:transparent;cursor:pointer;margin:0;display:block;accent-color:var(--green)}input[type=range]::-webkit-slider-runnable-track{height:4px;background:linear-gradient(to right,var(--green) var(--progress,0%),#dfe5d8 var(--progress,0%));border-radius:5px}input[type=range]::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:14px;height:14px;background:var(--green);border-radius:50%;margin-top:-5px}input[type=range]::-moz-range-track{height:4px;background:#dfe5d8}input[type=range]::-moz-range-progress{height:4px;background:var(--green)}input[type=range]::-moz-range-thumb{width:14px;height:14px;background:var(--green);border-radius:50%;border:0}.time-row{display:flex;justify-content:space-between;font:12px/1.6 var(--sans);font-variant-numeric:tabular-nums;color:var(--muted);margin-top:4px}.player-controls{display:flex;justify-content:center;align-items:center;gap:28px}.play-button,.primary-button{border:0;background:var(--green);color:var(--white);border-radius:8px;min-height:52px;padding:12px 24px;font-size:15px}.play-button{display:flex;justify-content:center;align-items:center;gap:12px;min-width:170px}.play-icon{font-size:13px;min-width:14px}.small-control,.speed-button{background:none;border:0;min-width:44px;min-height:44px;padding:0;color:var(--muted)}.small-control>span{display:block;font:29px/25px Georgia}.small-control small{display:block;font-size:10px;margin-top:3px}.speed-button{font-size:14px}.player-status{font-size:12px;line-height:1.8;min-height:22px;text-align:center;color:var(--muted);margin:17px 0}.player-status:empty{visibility:hidden}.player-bottom{border-top:1px solid var(--line);padding-top:8px;display:flex;justify-content:space-between;gap:12px}.text-button{border:0;background:none;font-size:13px;min-height:44px;padding:8px 0;color:var(--green)}.support{margin-top:15px;display:flex;flex-direction:column;gap:12px}.support>details{border:1px solid var(--line);border-radius:10px;background:var(--white)}summary{list-style:none;cursor:pointer;min-height:52px;display:flex;align-items:center;gap:12px;font-size:14px}summary::-webkit-details-marker{display:none}summary>span:last-child{margin-left:auto;color:var(--muted);font-size:18px}details[open]>summary>span:last-child{transform:rotate(45deg)}.support>details>summary{padding:12px 20px}.support summary small{color:var(--muted);font-size:12px}.transcript-body{font:20px/1.95 Georgia,serif;padding:0 22px 5px;color:#304338}.transcript-body p{margin:0 0 22px}.word{font:inherit;display:inline;padding:0 1px;background:#e9ecdd;border:0;border-bottom:1px dashed #6e875f;border-radius:2px;line-height:inherit;text-align:left}.word[aria-expanded=true]{background:#dce4cd}.word-meaning{font:13px/1.8 var(--sans);color:#46643d;background:#edf2e4;padding:2px 5px;box-decoration-break:clone;-webkit-box-decoration-break:clone}.translation{border-top:1px solid var(--line);margin:0 22px 10px}.translation>summary{font-size:13px;color:var(--muted)}.translation-body{font-size:15px;line-height:2;color:#4f5b51;padding-bottom:8px}.translation-body p{margin:0 0 17px}.vocab-list{padding:0 20px 12px}.vocab-item{display:flex;gap:15px;padding:13px 0;border-top:1px solid var(--line);align-items:start}.vocab-word{min-width:38%;font:18px/1.5 Georgia;color:var(--green)}.vocab-word small{display:block;font:12px var(--sans);color:var(--muted);margin-top:5px}.vocab-meaning{font-size:13px;line-height:1.8}.reading-section{margin-top:24px;scroll-margin-top:20px;outline:none}.reading-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.reading-heading h2{font-size:18px;font-weight:500;margin:0}.reading-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.secondary-button,.record-button{border:1px solid #b7c6b5;border-radius:7px;padding:11px 15px;background:transparent;min-height:46px;font-size:13px;color:var(--green)}.record-button{display:flex;gap:9px;align-items:center}.record-dot{width:8px;height:8px;background:#a96046;border-radius:50%}.record-button.recording{background:#f6ece2;border-color:#aa7754}.record-status{font-size:12px;line-height:1.8;color:var(--muted);margin:12px 0 22px}.reading-text{padding:0}.reading-card .translation{margin-left:0;margin-right:0}.finish-row{display:flex;align-items:center;flex-wrap:wrap;gap:16px;border-top:1px solid var(--line);padding-top:22px;margin-top:22px}.finish-row>span{font-size:12px;color:var(--muted)}#completion{margin-top:9px}.primary-button{font-size:14px;min-height:46px}#recorded-audio{width:100%;height:44px;margin-bottom:22px}.storage-message{font-size:12px;line-height:1.8;color:#915b3a}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}dialog{border:1px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);width:560px;max-width:calc(100% - 28px);max-height:86dvh;padding:26px;box-shadow:0 12px 70px #23382b22}dialog::backdrop{background:#23392e66}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.dialog-heading h2{font-size:21px;font-weight:500;margin:0}.close-dialog{border:0;background:none;min-width:44px;min-height:44px;font-size:25px;color:var(--muted)}.dialog-intro{font-size:13px;color:var(--muted);margin:15px 0}.library-item{display:flex;width:100%;text-align:left;align-items:center;gap:14px;padding:16px 10px;border:0;border-bottom:1px solid var(--line);background:none;min-height:80px}.library-item[aria-current=true]{background:#e8eddf;border-radius:7px}.library-index{font-size:17px;color:#7f8e76;min-width:23px}.library-copy{flex:1}.library-copy strong{display:block;font-size:16px;font-weight:500;line-height:1.6}.library-copy small{display:block;font-size:11px;line-height:1.7;color:var(--muted);margin-top:4px}.library-tag{font-size:11px;color:#59774f;white-space:nowrap}.help-block{border-top:1px solid var(--line);margin-top:19px;padding-top:12px}.help-block h3{font-size:14px;font-weight:500}.help-block p,.privacy-note{font-size:12px;line-height:1.9;color:var(--muted)}.privacy-note{margin-top:23px}#cache-status{min-height:22px}
@media(max-width:540px){.wrap{padding-left:20px;padding-right:20px}.site-header{height:74px}.brand{font-size:20px}nav{gap:16px}.nav-button{font-size:13px}main{padding-top:23px!important}.listening-card,.reading-card{padding:23px 20px}h1{font-size:25px}.english-title{font-size:17px}.timeline{margin-top:25px}.player-controls{gap:20px}.play-button{min-width:158px;padding:12px 18px;font-size:14px}.player-status{font-size:11px}.support>details>summary{padding-left:17px;padding-right:17px}.transcript-body{font-size:19px;padding-left:18px;padding-right:18px}.reading-text{padding:0}.translation{margin-left:18px;margin-right:18px}.vocab-list{padding-left:17px;padding-right:17px}.vocab-word{font-size:16px;min-width:38%}.vocab-meaning{font-size:12px}.vocab-word small{font-size:11px}.library-item{padding-left:5px;padding-right:5px;gap:9px}.library-copy strong{font-size:15px}.library-copy small{font-size:10px}.library-tag{font-size:10px}dialog{padding:23px 18px}.reading-controls{gap:10px}}
@media(max-width:350px){.wrap{padding-left:14px;padding-right:14px}.listening-card,.reading-card{padding-left:17px;padding-right:17px}.player-controls{gap:12px}.play-button{min-width:148px}.transcript-body{font-size:18px}.reading-text{padding:0}.reading-controls{gap:8px}.secondary-button,.record-button{font-size:12px;padding:10px 12px}}