:root{--paper:#fff;--ink:#28312f;--muted:#72817c;--green:#355d52;--wash:#f1f6f3;--yellow:#eff0a0;--line:#dce5df}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:#f1f4f2;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
::selection{background:var(--yellow);color:var(--ink)}
a{color:var(--green);text-underline-offset:4px}
a:focus-visible{outline:2px solid var(--green);outline-offset:5px}
.paper{max-width:720px;margin:40px auto 64px;background:var(--paper);padding:42px 58px 32px}
.mast{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-bottom:28px;font-size:12px;color:var(--muted)}
.brand{font-family:Futura,"Avenir Next",sans-serif;font-size:20px;font-weight:500;color:var(--green);letter-spacing:-.7px}
.mast p{margin:0}
.article-head{padding-bottom:18px}
h1{font-size:36px;line-height:1.45;font-weight:650;letter-spacing:-1px;margin:6px 0 18px}
h1 span{display:block}
.article-meta{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:12px}
.article-meta .episode{color:var(--green);font-weight:500}
.body-copy{font-size:17px;line-height:2;letter-spacing:.35px;overflow-wrap:break-word}
.body-copy p{margin:22px 0}
.body-copy strong{font-weight:600}
.scene{margin:28px 0 24px}
.scene img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;background:#e4e9e7}
.scene figcaption{font-size:11px;line-height:1.6;color:var(--muted);margin-top:8px;letter-spacing:0}
.dialogue{background:#233f3a;color:#fff;padding:23px 25px 22px;margin:0}
.dialogue .quote{font-family:"Avenir Next",Arial,sans-serif;font-size:21px;line-height:1.55;letter-spacing:0;margin:0}
.dialogue mark{background:transparent;color:var(--yellow)}
.dialogue .translation{font-size:14px;color:#d6e5df;line-height:1.8;margin:12px 0 0;letter-spacing:.3px}
.word-reveal{color:var(--green);font-size:22px;font-weight:600;margin-top:-5px!important}
h2{font-size:22px;line-height:1.5;font-weight:650;letter-spacing:0;margin:48px 0 23px}
.root-figure{background:var(--wash);margin:26px 0;padding:28px 20px 24px;text-align:center;letter-spacing:0}
.roots{display:flex;align-items:center;justify-content:center;gap:22px;font-family:"Avenir Next",Arial,sans-serif}
.root-piece{display:flex;flex-direction:column;align-items:center;gap:7px}
.root-piece strong{font-size:43px;line-height:1.15;font-weight:600;letter-spacing:-1.5px}
.root-piece span{font-family:"PingFang SC",sans-serif;font-size:13px;color:var(--muted);line-height:1.5}
.root-piece.glove strong{background:linear-gradient(transparent 60%,var(--yellow) 60%);padding:0 4px}
.plus{font-size:25px;color:#879c94;align-self:flex-start;line-height:1.7}
.root-result{border-top:1px solid #d6e2db;padding-top:15px;margin:22px 0 0!important;color:var(--green);font-size:18px;line-height:1.7}
.root-result strong{font-family:"Avenir Next",Arial,sans-serif;font-size:24px;font-weight:600;letter-spacing:-.5px}
.pronunciation{display:flex;justify-content:space-between;gap:12px;align-items:center;font-family:"Avenir Next",Arial,sans-serif;font-size:17px;color:var(--green);margin-top:14px;line-height:1.5}
.pronunciation span:last-child{font-family:"PingFang SC",sans-serif;font-size:12px;color:var(--muted)}
.closed-note{border-left:3px solid #a4bdb0;padding:2px 0 2px 18px;margin:28px 0;color:#53635b;font-size:15px;line-height:1.9}
.closed-note p{margin:0}
.closed-note strong{color:var(--green);font-family:"Avenir Next","PingFang SC",sans-serif;letter-spacing:0}
.vocab-pair{margin:26px 0 28px;display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}
.vocab-pair>div{padding-right:18px}
.vocab-pair>div+div{border-left:1px solid var(--line);padding-left:24px;padding-right:0}
.vocab-pair dt{font-family:"Avenir Next",Arial,sans-serif;font-size:23px;font-weight:600;letter-spacing:-.5px;color:var(--green);line-height:1.4}
.vocab-pair dd{margin:0}
.vocab-pair .meaning{font-size:17px;line-height:1.8;margin:5px 0 8px;font-weight:600}
.vocab-pair .explain{font-size:13px;line-height:1.8;color:var(--muted);letter-spacing:.2px}
.listen-sheet{padding:23px 22px 14px;margin:28px 0;background:#f5f7f5;letter-spacing:0}
.listen-sheet figcaption{font-size:12px;color:var(--muted);margin-bottom:16px;line-height:1.5}
.listen-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding:12px 0}
.listen-row:last-child{border-bottom:0}
.listen-row .en{font-size:18px;font-family:"Avenir Next",Arial,sans-serif;line-height:1.4;color:var(--green);font-weight:500}
.listen-row .cn{font-size:13px;line-height:1.6;text-align:right;color:#66756e;white-space:nowrap}
.end-note{margin-top:28px}
.sources{margin-top:48px;border-top:1px solid var(--line);padding-top:24px;font-size:11px;line-height:1.9;color:var(--muted);letter-spacing:0}
.sources h2{font-size:12px;font-weight:500;margin:0 0 10px;color:#52645b}
.sources ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:5px 16px}
.sources a{color:var(--muted);text-decoration-color:#b3c0b9}
.sources p{margin:17px 0 0}
.ending{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding-top:20px;margin-top:26px;color:var(--muted);font-size:11px;gap:16px}
.ending .brand{font-size:16px}
.preview-link{display:block;text-align:center;margin:-38px auto 28px;font-size:12px;color:#66796f}
@media(max-width:760px){body{background:white}.paper{margin:0 auto;padding:27px 24px 30px}.mast{padding-bottom:24px}.brand{font-size:18px}h1{font-size:30px;letter-spacing:-.6px}.article-head{padding-bottom:12px}.body-copy{font-size:16px;line-height:2}.body-copy p{margin:22px 0}.dialogue{padding:20px}.dialogue .quote{font-size:20px}.dialogue .translation{font-size:13px}.word-reveal{font-size:21px}h2{font-size:21px;margin-top:40px}.root-piece strong{font-size:40px}.root-figure{padding:25px 18px 22px}.vocab-pair dt{font-size:22px}.vocab-pair>div+div{padding-left:19px}.listen-sheet{padding:22px 18px 12px}.listen-row{display:block;padding:12px 0}.listen-row .en{font-size:18px}.listen-row .cn{display:block;text-align:left;margin-top:3px;font-size:13px}.sources ul{grid-template-columns:1fr;gap:4px}.preview-link{margin:0 auto 24px}}
@media(max-width:350px){.paper{padding-left:20px;padding-right:20px}.mast{font-size:10px;gap:8px}h1{font-size:26px}.dialogue{padding:18px 16px}.dialogue .quote{font-size:18px}.roots{gap:18px}.root-piece strong{font-size:36px}.pronunciation{font-size:16px}.pronunciation span:last-child{font-size:11px}.vocab-pair dt{font-size:20px}.vocab-pair>div+div{padding-left:15px}.vocab-pair>div{padding-right:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white}.paper{max-width:680px;margin:0 auto;padding:20px}.preview-link{display:none}.scene,.root-figure,.vocab-pair,.listen-sheet{break-inside:avoid}a{color:inherit}}

.article-head h1{font-size:33px;line-height:1.5;letter-spacing:-.6px}
.article-meta{flex-wrap:wrap}
.lesson-range{font-size:13px;line-height:1.7;color:var(--muted);margin:15px 0 0}
.scene img{aspect-ratio:auto}
.scene{margin-top:24px;margin-bottom:28px}
.lesson-frame{scroll-margin-top:24px}
.lesson-frame a{display:block}
.lesson-frame figcaption a{display:inline;margin-left:5px;white-space:nowrap}
.frame-sequence{margin:22px 0 26px;scroll-margin-top:24px}
.lesson .sequence-note{margin:0 0 12px;font-size:13px;line-height:1.8;color:var(--green)}
.frame-sequence .lesson-frame{margin:0 0 14px}
.frame-sequence .lesson-frame:last-child{margin-bottom:0}
.lesson .frame-reference{font-size:13px;line-height:1.8;color:var(--muted);margin:16px 0}
.frame-reference a{color:inherit;text-decoration-color:#b7c5bd}
.lesson .subtitle-note{font-size:14px;line-height:1.9;padding:15px 18px;margin:18px 0 22px;border-left:3px solid #c5a35a;background:#faf7ef;color:#665b44}
.lesson{margin:40px 0 0;padding-top:26px;border-top:1px solid var(--line);scroll-margin-top:24px}
.lesson-head{display:flex;gap:15px;align-items:baseline;margin-bottom:7px}
.lesson-no{font-family:"Avenir Next",Arial,sans-serif;color:#839a90;font-size:13px;flex:0 0 22px}
.lesson h2{margin:0;font-family:"Avenir Next","PingFang SC",Arial,sans-serif;font-size:30px;line-height:1.25;font-weight:600;letter-spacing:-.6px;overflow-wrap:normal}
.lesson .meaning{font-size:17px;font-weight:600;line-height:1.7;color:var(--green);margin:8px 0 0 37px}
.lesson .sound{font-size:12px;color:var(--muted);line-height:1.7;margin:4px 0 0 37px;font-family:"Avenir Next","PingFang SC",Arial,sans-serif;letter-spacing:0}
.lesson .scene-context{font-size:14px;line-height:1.9;color:#6b7871;margin:22px 0 18px}
.lesson .dialogue{margin:18px 0 24px;padding:19px 22px;background:#f0f5f2;color:var(--green);border-left:3px solid #adc4b8}
.lesson .dialogue .quote{font-size:20px;font-weight:500}
.lesson .dialogue .translation{color:#6c7d73;font-size:13px}
.usage{margin:24px 0 0;padding:0 0 0 18px;border-left:2px solid #dce4df}
.usage-note{font-size:11px;color:var(--muted);line-height:1.6;letter-spacing:0;margin-bottom:9px}
.usage-row{padding:0 0 12px}
.usage-row:last-child{padding-bottom:0}
.usage-en{font-family:"Avenir Next",Arial,sans-serif;font-size:18px;font-weight:500;line-height:1.55;color:var(--green);letter-spacing:0}
.usage-cn{font-size:13px;line-height:1.8;color:#738078;letter-spacing:.2px}
.word-extension{margin-top:27px;padding-top:20px;border-top:1px dashed #dce4df}
.word-extension h3{margin:0 0 12px;font-size:16px;line-height:1.7;font-weight:600;color:var(--green);letter-spacing:.2px}
.word-extension .extension-intro,.word-extension .extension-note{font-size:14px;line-height:1.9;margin:12px 0;color:#59665f}
.related-terms{margin:0;padding:0}
.related-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.45fr);gap:18px;padding:12px 0;border-bottom:1px solid #edf0ed;align-items:baseline}
.related-row dt{font-family:"Avenir Next",Arial,sans-serif;font-size:16px;font-weight:500;color:var(--green);line-height:1.6;letter-spacing:0;overflow-wrap:anywhere}
.related-row dd{margin:0;font-size:14px;line-height:1.85;letter-spacing:.1px;color:#59665f}
.related-row[class*="code-"] dt::before{content:"";display:inline-block;width:8px;height:8px;margin-right:9px;border-radius:50%;background:var(--code-color);vertical-align:1px}
.code-blue{--code-color:#3b78ae}.code-red{--code-color:#bc5151}.code-gray{--code-color:#747d7c}.code-pink{--code-color:#c77f9b}.code-silver{--code-color:#a8b2bb}
.word-extension .extension-source{margin:12px 0 0;font-size:11px;line-height:1.8;color:#748078;letter-spacing:0}
.extension-source a{color:inherit;text-decoration:underline;text-underline-offset:3px}
@media(max-width:480px){.related-row{grid-template-columns:1fr;gap:3px;padding:11px 0}.word-extension h3{font-size:15px}.related-row dt{font-size:16px}.related-row dd{font-size:14px}}
.recall{margin-top:42px;padding:24px;background:#f2f6f3}
.recall h2{margin:0 0 17px;font-size:17px}
.recall-row{display:grid;grid-template-columns:1fr 1.2fr;gap:15px;padding:10px 0;border-top:1px solid var(--line);align-items:baseline;font-size:13px;line-height:1.7;letter-spacing:0}
.recall-row .en{font-family:"Avenir Next",Arial,sans-serif;font-size:15px;color:var(--green);font-weight:500}
.recall-row .cn{color:#6a7a70}
.next-lesson{font-size:14px;color:var(--green);margin-top:28px!important}
@media(max-width:760px){.article-head h1{font-size:29px}.lesson{margin-top:35px;padding-top:25px}.lesson h2{font-size:27px}.lesson-head{gap:12px}.lesson-no{flex-basis:20px}.lesson .meaning,.lesson .sound{margin-left:32px}.lesson .meaning{font-size:16px}.lesson .dialogue{padding:17px 18px}.lesson .dialogue .quote{font-size:19px}.recall{padding:21px 18px}.recall-row{grid-template-columns:1fr;gap:2px;padding:11px 0}}
@media(max-width:350px){.article-head h1{font-size:25px}.lesson h2{font-size:24px}.lesson .dialogue .quote{font-size:18px}}

.series-nav{display:flex;flex-wrap:wrap;gap:8px 22px;margin:23px 0;font-size:12px;line-height:1.8;letter-spacing:0}.series-nav a{color:var(--muted);text-decoration:none;padding:5px 0;border-bottom:1px solid transparent}.series-nav a[aria-current="page"]{color:var(--green);border-color:var(--green);font-weight:600}.series-nav a:hover{color:var(--green);text-decoration:underline}.series-nav a:focus-visible{outline:2px solid var(--green);outline-offset:5px}

/* Site navigation around the approved five-word lesson layout. */
:root{--green:#3f6757;--ink:#3b3e39;--muted:#69756d;--line:#d8dfd8;--sans:"Gill Sans","Gill Sans MT",GillSans,"Trebuchet MS","PingFang SC","Microsoft YaHei",sans-serif;color-scheme:light}
html{scroll-padding-top:28px}body{background:#fff}a{overflow-wrap:anywhere}
.site-shell{display:grid;grid-template-columns:210px minmax(0,780px);gap:clamp(48px,6vw,86px);max-width:1264px;margin:auto;padding:66px 40px 48px;align-items:start}
.site-sidebar{position:sticky;top:48px;max-height:calc(100dvh - 80px);overflow:auto;scrollbar-width:thin;padding-right:10px;font-family:var(--sans)}
.wordmark{display:inline-block;color:#666569;text-decoration:none;font-size:34px;font-weight:400;letter-spacing:.32em;line-height:1.26}
.site-label{margin:23px 0 48px;font-size:12px;letter-spacing:.13em;line-height:1.8;color:var(--muted)}
.site-nav summary,.word-nav summary{cursor:pointer;color:var(--green);font-size:12px;line-height:1.8;padding:9px 0}
.site-nav ol{list-style:none;margin:0;padding:10px 0 0}.site-nav li{margin:0 0 19px}.site-nav a{display:grid;grid-template-columns:26px minmax(0,1fr);gap:10px;font-size:13px;line-height:1.9;text-decoration:none}.nav-number{color:#87664e;font-variant-numeric:tabular-nums}
.site-nav a[aria-current=page]{font-weight:600}.site-nav a[aria-current=page]>span:last-child{text-decoration:underline;text-underline-offset:5px;text-decoration-color:#a4bbaa}
.word-nav{border-top:1px solid var(--line);margin-top:25px;padding-top:8px}.word-nav ol{padding-left:21px;font-size:13px;line-height:1.6}.word-nav li{padding-left:1px;margin-bottom:12px}.word-nav a{color:var(--muted);text-decoration:none}.word-nav a:hover,.site-nav a:hover{color:var(--green);text-decoration:underline}
.archive-back{display:inline-block;margin-top:25px;font-size:12px;color:var(--muted)}
main{min-width:0}.paper{max-width:none;margin:0;padding:0}.article-head{border-top:4px solid var(--green);padding:30px 0 18px}.article-head h1{font-family:Georgia,"Songti SC",STSong,serif;font-weight:500;font-size:38px;line-height:1.6;letter-spacing:.01em}
.body-copy{font-size:17px;line-height:2.05}.lesson{scroll-margin-top:24px}.lesson h2{font-size:34px;color:var(--green);overflow-wrap:anywhere}.lesson .meaning,.lesson .sound{margin-left:37px}.scene img{background:#f3f5f1;border-radius:2px}.scene figcaption{line-height:1.9;font-size:11px}.lesson .dialogue .quote{font-size:22px;line-height:1.7}.lesson .dialogue .translation{font-size:14px;line-height:1.9}
.sources{margin-top:42px;padding-top:24px}.sources ul{gap:7px 24px}.sources a{overflow-wrap:anywhere}.article-pagination,.collection-footer{display:flex;justify-content:space-between;gap:22px;border-top:1px solid var(--line);padding:24px 0 0;margin-top:38px;font:12px/1.8 var(--sans);color:var(--muted)}
.skip-link{position:fixed;top:-90px;left:16px;z-index:20;background:#fff;padding:12px 18px}.skip-link:focus{top:12px}
.collection-head{border-top:4px solid var(--green);padding:30px 0 40px}.collection-kicker{font:11px/1.8 var(--sans);letter-spacing:.14em;color:#87664e;margin:0 0 27px}.collection-head h1{font:500 54px/1.55 Georgia,"Songti SC",STSong,serif;color:var(--green);letter-spacing:.01em;margin:0 0 23px}.collection-intro{font:20px/1.9 Georgia,"Songti SC",STSong,serif;margin:0 0 14px}.collection-description{font-size:14px;line-height:1.9;color:var(--muted);margin:0;max-width:580px}
.lesson-list{list-style:none;padding:0;margin:0}.lesson-list li{border-top:1px solid var(--line);padding:32px 0}.lesson-link{display:grid;grid-template-columns:minmax(0,245px) minmax(0,1fr);gap:30px;text-decoration:none;align-items:start}.lesson-link img{width:100%;height:auto;display:block}.lesson-link h2{font:500 23px/1.7 Georgia,"Songti SC",STSong,serif;color:var(--ink);margin:10px 0 14px}.lesson-link p{margin:0}.lesson-link .issue-label{font:10px/1.8 var(--sans);letter-spacing:.15em;color:#87664e}.entry-range{color:var(--muted);font-size:12px;line-height:1.8}.lesson-link .entry-terms{font:14px/1.9 var(--sans);color:var(--green);margin-top:14px}.read-link{display:block;margin-top:19px;font-size:12px;color:var(--green)}
@media(max-width:1050px) and (min-width:901px){.site-shell{grid-template-columns:180px minmax(0,1fr);gap:42px;padding-inline:28px}.lesson-link{grid-template-columns:1fr}.lesson-link img{max-width:310px}}
@media(max-width:900px){.site-shell{display:block;max-width:820px;padding:32px 24px 40px}.site-sidebar{position:static;max-height:none;overflow:visible;padding:0;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:0 20px;margin-bottom:30px}.wordmark{font-size:25px;width:max-content}.site-label{margin:4px 0 0;text-align:right;font-size:10px;letter-spacing:.06em}.site-nav,.word-nav{grid-column:1/-1;border-top:1px solid var(--line);margin:24px 0 0;padding:0}.word-nav{margin-top:0;border-bottom:1px solid var(--line)}.site-nav summary,.word-nav summary{min-height:44px;padding:11px 0}.site-nav li{margin:0}.site-nav a{font-size:14px;min-height:44px;padding:10px 0}.word-nav li{margin:0}.word-nav a{display:block;padding:10px 0;min-height:40px}.archive-back{display:none}.article-head{padding-top:22px}.article-head h1{font-size:31px}.paper{padding:0}.body-copy{font-size:16px}.lesson h2{font-size:29px}.lesson .meaning,.lesson .sound{margin-left:32px}.lesson .dialogue .quote{font-size:20px}.collection-head{padding:24px 0 33px}.collection-head h1{font-size:42px}.collection-intro{font-size:18px}}
@media(max-width:560px){.lesson-link{grid-template-columns:1fr;gap:20px}.lesson-link img{max-width:none}.lesson-link h2{font-size:23px}.lesson-list li{padding:26px 0}.lesson .dialogue{padding:16px}.lesson .dialogue .quote{font-size:18px}.sources ul{grid-template-columns:1fr}.article-head h1{font-size:28px}.lesson h2{font-size:27px}.lesson-head{gap:11px}.collection-description{font-size:13px}.collection-head h1{font-size:37px}}
@media(max-width:350px){.site-shell{padding-inline:20px}.wordmark{font-size:23px}.article-head h1{font-size:25px}.lesson h2{font-size:24px}.collection-head h1{font-size:32px}.site-label{font-size:9px}}
@media print{.site-shell{display:block;padding:20px}.site-sidebar,.article-pagination{display:none}.paper{max-width:760px;margin:auto}.sources a{color:inherit}}