@charset "UTF-8";
:root{--paper:#f7f6f0;--ink:#253b31;--muted:#798179;--green:#264d40;--line:#dddfd4;--sage:#e9ede3;--orange:#b36443;--white:#fffefa;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #b48458;outline-offset:5px}input:focus-visible{outline:2px solid #527a66;outline-offset:3px}[hidden]{display:none!important}.shell{width:min(1060px,calc(100% - 80px));margin-inline:auto}.header{height:114px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:15px;font-weight:650;font-size:18px;letter-spacing:1px}.brand small{display:block;font-size:8px;letter-spacing:1.7px;font-weight:500;margin-top:7px;color:var(--muted)}.brand-mark{background:var(--green);color:var(--paper);height:45px;width:45px;border-radius:13px;display:flex;align-items:center;justify-content:center;gap:1px;font-family:Georgia,serif;font-style:italic;font-size:23px;font-weight:400;letter-spacing:-1px}.brand-mark span{width:1px}.edition{font-size:12px;color:#667368;letter-spacing:1px}.edition span{padding:0 8px}.eyebrow{font-size:10px;font-weight:600;letter-spacing:2.5px;color:#6b806e;display:flex;align-items:center;gap:10px}.eyebrow:before{content:"";width:20px;height:1px;background:#7d927b}.hero{padding:65px 0 54px;display:grid;grid-template-columns:1fr 310px;align-items:center;gap:30px}.hero h1{font-size:43px;line-height:1.55;font-weight:500;letter-spacing:2px;margin:18px 0 16px}.hero h1 em{font-style:normal;color:#72826b}.hero p{font-size:13px;line-height:2;color:#7a8176;margin:0}.hero-art{width:270px;height:235px;position:relative;margin-inline:auto;display:grid;place-items:center}.record{width:190px;height:190px;border-radius:50%;background:repeating-radial-gradient(circle,#355747 0,#355747 1px,#305040 2px,#305040 9px);box-shadow:0 9px 20px #243c3015;position:relative;display:grid;place-items:center;transform:rotate(-14deg)}.record:before{content:"";position:absolute;inset:24px;border:1px solid #6d886744;border-radius:50%}.record-center{width:78px;height:78px;border-radius:50%;background:#e0e5cf;display:flex;align-items:center;justify-content:center;gap:5px}.record-center i{width:4px;background:#355747;border-radius:4px;height:20px}.record-center i:nth-child(2){height:33px}.record-center i:nth-child(3){height:41px}.record-center i:nth-child(4){height:28px}.record-center i:nth-child(5){height:15px}.orbit{position:absolute;inset:7px;border:1px solid #d9ddce;border-radius:50%;transform:rotate(-30deg) scaleY(.72)}.art-label{position:absolute;font-size:9px;letter-spacing:2.2px;color:#8b927f;background:var(--paper);padding:7px;right:-3px;bottom:16px}.art-star{position:absolute;top:15px;right:24px;color:#b58e5c;font-size:29px}.art-dot{position:absolute;width:10px;height:10px;background:#b58e5c;border:3px solid var(--paper);border-radius:50%;top:67px;left:4px}.collection-head{display:flex;justify-content:space-between;align-items:center;padding:23px 0 21px;border-top:1px solid var(--line)}.collection-head h2{font-size:18px;font-weight:550;letter-spacing:1px;margin:0}.collection-head h2 small{font-size:10px;letter-spacing:2px;font-weight:400;color:var(--muted);margin-left:14px}.count{font-size:11px;color:var(--muted)}.lesson{display:flex;align-items:center;gap:26px;padding:28px 30px;background:var(--white);border:1px solid var(--line);border-radius:12px;transition:box-shadow .2s,border-color .2s,transform .2s}.lesson:hover{border-color:#a9b5a3;box-shadow:0 6px 20px #304d3e08;transform:translateY(-2px)}.lesson-index{font-family:Georgia,serif;font-size:31px;color:#9aa58e;min-width:41px}.lesson-body{flex:1}.lesson-meta{font-size:10px;letter-spacing:1.4px;color:#7e8878;display:flex;align-items:center;gap:10px}.tag{font-size:9px;padding:3px 7px;background:#eef1e8;border-radius:4px;color:#58704f;letter-spacing:0}.lesson h3{font-family:Georgia,"Times New Roman",serif;font-size:23px;font-weight:400;margin:11px 0 10px}.lesson-description{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.lesson-end{display:flex;align-items:center;gap:25px;font-size:11px;color:var(--muted)}.lesson-arrow{width:40px;height:40px;display:grid;place-items:center;background:var(--sage);border-radius:50%;color:var(--green);font-size:19px}.home-note{font-size:11px;color:#8a8f81;display:flex;align-items:center;gap:8px;margin:21px 0 80px}.note-dot{width:5px;height:5px;background:#879879;border-radius:50%}.footer{border-top:1px solid var(--line);padding-block:25px 30px;color:#8c9285;font-size:10px;display:flex;justify-content:space-between;letter-spacing:.4px}.footer-dot{padding:0 6px}.back{display:inline-flex;align-items:center;gap:8px;color:#75816f;font-size:12px;margin-top:32px}.back:hover{color:var(--green)}.detail-heading{padding:29px 0 26px;display:flex;align-items:end;justify-content:space-between;gap:20px}.detail-heading h1{font:400 35px/1.3 Georgia,"Times New Roman",serif;margin:14px 0 11px}.detail-heading p{font-size:12px;color:var(--muted);margin:0;line-height:1.8}.detail-heading .part-badge{font-size:11px;color:#6f7d64;border:1px solid #d7ddcd;border-radius:30px;padding:8px 13px;white-space:nowrap;margin-bottom:3px}.player{background:var(--green);color:#f7f6eb;padding:30px 35px;border-radius:14px;position:relative;overflow:hidden}.player-top{display:flex;align-items:center;justify-content:space-between;color:#b9c7b3;font-size:10px;letter-spacing:1.6px}.player-top span:first-child{display:flex;align-items:center;gap:7px}.player-top i{width:5px;height:5px;border-radius:50%;background:#b8c6a1}.waveform{height:65px;margin:27px 0 16px;display:flex;align-items:center;gap:4px;opacity:.9;overflow:hidden}.waveform span{flex:1;min-width:2px;max-width:8px;border-radius:3px;background:#7d9b7c;transition:background .2s}.waveform span.heard{background:#d1d9b8}.timeline{width:100%;height:5px;display:block;margin:8px 0 10px;accent-color:#e0e5c9;cursor:pointer}.times{display:flex;justify-content:space-between;color:#c0cbb7;font-size:10px;font-variant-numeric:tabular-nums}.controls{display:flex;justify-content:space-between;align-items:center;margin-top:18px}.transport{display:flex;align-items:center;gap:21px}.icon-btn{background:transparent;border:0;color:inherit;padding:9px;display:grid;place-items:center;border-radius:50%;min-width:40px;min-height:40px}.icon-btn:hover{background:#ffffff12}.icon-btn svg{width:22px;height:22px}.play{width:52px;height:52px;background:#e5e9d4;color:var(--green);border:0;border-radius:50%;display:grid;place-items:center}.play:hover{background:#f8faec}.play svg{width:22px;height:22px}.player-options{display:flex;align-items:center;gap:12px}.speed{background:#355c4c;color:#e0e8d6;border:1px solid #66806b;border-radius:7px;padding:7px 8px;font-size:11px;max-width:90px}.speed option{background:var(--green);color:white}.repeat[aria-pressed=true]{background:#d9e0bd;color:var(--green)}.audio-message{font-size:11px;color:#f3dbc6;margin:15px 0 0;line-height:1.8}.audio-message a{text-decoration:underline}.player-caption{font-size:10px;color:#86907e;margin:12px 0 30px;line-height:1.8}.listening-notes{margin-bottom:55px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 18px}.section-heading h2{font-size:16px;font-weight:550;margin:0;letter-spacing:.6px}.section-heading span{font-size:10px;letter-spacing:1.5px;color:#929883}.question-intro{font-size:11px;line-height:1.9;color:#839078;margin:0 0 20px}.question{display:flex;gap:15px;padding:15px 0;border-top:1px solid var(--line)}.q-number{font-size:11px;font-family:Georgia,serif;color:#94a087;padding-top:3px}.question-body{flex:1}.question h3{font-size:11px;font-weight:600;letter-spacing:.25px;margin:0 0 8px;color:#5e7259}.question p{font:15px/2 Georgia,"Times New Roman",serif;margin:0;color:#465343}.blank{background:transparent;border:0;border-bottom:1px solid #adb99e;border-radius:0;color:var(--green);width:125px;max-width:100%;font:15px Georgia,serif;text-align:center;padding:4px 2px}.blank[data-result=correct]{color:#426f43;border-color:#426f43;background:#e7eddf}.blank[data-result=incorrect]{border-color:#ae7253;background:#f4e7dc}.blank::placeholder{color:#b0b6a3;font:italic 11px Georgia,serif}.feedback{font-size:11px;line-height:1.6;color:#946443;margin-top:7px}.feedback:empty{display:none}.question-actions{margin-top:18px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.primary-btn{background:var(--green);color:#f5f4e9;border:0;border-radius:7px;padding:11px 22px;font-size:12px}.primary-btn:hover{background:#37634d}.text-btn{color:#7c8973;background:none;border:0;font-size:11px;padding:10px}.score{font-size:12px;margin:15px 0;color:#617653;line-height:1.8}.sidebar{max-width:760px}.sidebar-label{font-size:9px;letter-spacing:2px;color:#939b86;margin:1px 0 15px}.transcript{border-bottom:1px solid var(--line);padding-bottom:19px}.transcript summary{display:flex;justify-content:space-between;align-items:center;gap:15px;cursor:pointer;list-style:none;font-size:14px;padding:6px 0}.transcript summary::-webkit-details-marker{display:none}.transcript summary:after{content:"+";color:#7b8d6e;font-size:22px;font-weight:300}.transcript[open] summary:after{content:"−"}.transcript-hint{font-size:11px;line-height:1.9;color:#89927e;margin:6px 0 0}.transcript-text{font:14px/1.9 Georgia,"Times New Roman",serif;color:#4a5b45;margin-top:18px}.transcript-text p{margin:0 0 16px}.answer-details{padding-block:18px;border-bottom:1px solid var(--line);font-size:12px}.answer-details summary{cursor:pointer;color:#718065}.answer-details ol{padding-left:23px;color:#59704e;font:13px/2 Georgia,serif}.study-note{margin-top:25px;padding:18px;background:#eeefe5;border-radius:8px}.study-note h3{font-size:11px;font-weight:500;margin:0 0 10px}.study-note p{font-size:11px;line-height:1.9;color:#88917b;margin:0}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.empty{padding:60px 0;line-height:2}.empty a{text-decoration:underline}
@media(min-width:1400px){.hero{padding-top:76px;padding-bottom:65px}.hero h1{font-size:48px}.home-note{margin-bottom:100px}}
@media(max-width:700px){.shell{width:calc(100% - 40px)}.header{height:90px}.brand{font-size:16px;gap:11px}.brand-mark{height:40px;width:40px}.brand small{font-size:7px;letter-spacing:1.1px}.edition{font-size:10px;letter-spacing:0}.edition span{padding:0 3px}.hero{grid-template-columns:1fr 125px;gap:5px;padding:41px 0 37px}.eyebrow{font-size:8px;letter-spacing:1.6px;gap:7px}.eyebrow:before{width:13px}.hero h1{font-size:28px;letter-spacing:.5px;line-height:1.6;margin:16px 0}.hero p{font-size:11px;max-width:215px}.hero-art{width:125px;height:155px}.record{width:112px;height:112px}.record-center{width:47px;height:47px;gap:3px}.record-center i{width:3px;transform:scaleY(.65)}.record:before{inset:14px}.orbit{inset:-4px}.art-star{font-size:21px;top:0;right:3px}.art-label{font-size:6px;letter-spacing:1px;right:-8px;bottom:0;padding:5px}.art-dot{left:-7px;top:45px}.collection-head{padding:19px 0}.collection-head h2{font-size:16px}.collection-head h2 small{font-size:8px;margin-left:9px;letter-spacing:1px}.lesson{padding:23px 18px;gap:15px;align-items:flex-start}.lesson-index{font-size:26px;min-width:26px;margin-top:17px}.lesson h3{font-size:20px;line-height:1.3}.lesson-meta{font-size:9px;letter-spacing:.7px;gap:7px}.lesson-description{font-size:11px}.lesson-end{gap:0;align-self:center}.lesson-end>span:first-child{display:none}.lesson-arrow{height:30px;width:30px;font-size:16px}.home-note{font-size:10px;line-height:1.9;margin-bottom:60px}.footer{font-size:9px;line-height:2;gap:10px;flex-wrap:wrap;padding-block:20px}.back{margin-top:25px;font-size:11px}.detail-heading{padding:25px 0 22px}.detail-heading h1{font-size:28px}.detail-heading .part-badge{display:none}.detail-heading p{font-size:11px}.player{padding:23px 23px;border-radius:11px}.player-top{font-size:8px;letter-spacing:1px}.waveform{height:58px;gap:3px;margin-top:23px}.transport{gap:12px}.controls{margin-top:18px}.player-options{gap:5px}.play{height:48px;width:48px}.icon-btn{padding:7px}.speed{font-size:10px;padding:7px 5px}.question p{font-size:15px}.question-intro{font-size:11px}.player-caption{font-size:9px;margin-bottom:28px}.transcript-text{font-size:15px}.study-note{padding:17px}.question{gap:12px}.blank{width:115px}.section-heading span{font-size:9px}.player-top .clip-name{letter-spacing:0}.hero-art{pointer-events:none}}
@media(max-width:365px){.hero{grid-template-columns:1fr 90px}.hero h1{font-size:25px}.hero-art{transform:scale(.8);transform-origin:right}.edition{font-size:9px}.lesson{gap:10px;padding-inline:14px}.lesson-index{display:none}.lesson h3{font-size:19px}.transport{gap:5px}.player{padding-inline:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.group-heading{font-size:13px;font-weight:550;letter-spacing:1px;margin:29px 0 13px;display:flex;align-items:center;gap:12px}.group-heading span{font-size:10px;font-weight:400;letter-spacing:.5px;color:var(--muted)}.lesson+.lesson{margin-top:12px}.home-note{margin-top:30px}.lesson h3{overflow-wrap:anywhere}