:root{--paper:#faf8f4;--ink:#1f2933;--muted:#56635f;--teal:#2f6f6d;--line:#dce1da;--white:#fffefb;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--teal);text-underline-offset:4px}button{font:inherit;color:inherit;cursor:pointer}button,a{touch-action:manipulation}button[hidden]{display:none!important}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:4px}p,h1,h2,h3,figure{margin-top:0}p{margin-bottom:1.1em}h1,h2,h3{line-height:1.18;letter-spacing:-.035em;font-weight:650}h1{font-size:clamp(2.25rem,4.4vw,4.1rem)}h2{font-size:clamp(1.7rem,2.4vw,2.4rem)}h3{font-size:1.25rem}img{display:block;max-width:100%;height:auto}.site-header{max-width:1240px;margin:auto;padding:28px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:21px;line-height:1.15;font-weight:650;letter-spacing:-.04em}.brand-mark{width:46px;height:46px;background:var(--teal);color:white;display:grid;place-items:center;border-radius:13px;font-size:27px;font-weight:450}.brand-sub{display:block;font-size:10px;letter-spacing:.2em;margin-top:5px;font-weight:600}.site-header nav{display:flex;gap:24px;align-items:center}.site-header nav a{padding:9px 0;color:var(--ink);font-size:14px;text-decoration:none}.site-header nav a:hover,.site-footer a:hover{text-decoration:underline}.skip{position:absolute;left:16px;top:-100px;background:white;padding:12px;z-index:20}.skip:focus{top:12px}.home{max-width:1240px;margin:auto;padding:0 32px}.hero{display:grid;grid-template-columns:1.16fr 1fr;gap:64px;align-items:center;padding:78px 0 84px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.13em;color:var(--teal);margin-bottom:22px;line-height:1.6}.hero h1{margin-bottom:25px}.hero h1 span{color:var(--teal)}.hero-lead{font-size:18px;color:var(--muted);max-width:520px}.audience{font-size:14px;color:var(--muted);max-width:480px}.button{min-height:46px;padding:12px 20px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;gap:18px;text-decoration:none;font-weight:600;font-size:14px;border:1px solid var(--teal)}.primary{background:var(--teal);color:white}.primary:hover{background:#245957}.text-link{display:inline-block;min-height:44px;padding:10px 0;font-weight:600;font-size:14px}.hero-copy>.text-link{margin-left:16px}.hero-meta{display:flex;gap:16px;flex-wrap:wrap;margin-top:22px;color:var(--muted);font-size:11px}.hero-meta span:not(:last-child)::after{content:'·';margin-left:16px}.hero-demo{background:var(--white);border:1px solid var(--line);border-radius:20px;padding:23px;box-shadow:0 18px 60px -25px #82978b55;position:relative}.hero-demo::before{content:'';position:absolute;inset:-35px;z-index:-1;background:radial-gradient(ellipse at 50% 45%,#dcebe37a,transparent 72%);pointer-events:none}.demo-top{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:12px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:20px}.demo-top .small{margin-left:auto;font-size:10px}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--teal)}.mini-chat{display:flex;flex-direction:column;gap:15px}.bubble{background:#edeff2;border-radius:13px 13px 13px 3px;padding:18px;max-width:100%;overflow-wrap:anywhere}.bubble.yours{background:#ddebe9;border-radius:13px 13px 3px 13px}.mini-chat .yours{align-self:flex-end}.mini-chat .bubble:not(.yours){align-self:flex-start}.phrase .zh{font-family:"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;font-size:23px;line-height:1.65;letter-spacing:.015em;margin-bottom:7px;overflow-wrap:anywhere}.phrase .pinyin{font-size:13px;color:var(--muted);line-height:1.65;margin-bottom:7px}.phrase .translation{font-size:15px;margin-bottom:0}.demo-note{margin:24px 0 15px;font-size:14px}.exercise{padding:22px 0;border-top:1px solid var(--line);margin-bottom:12px}.hero-demo .exercise{padding-bottom:0;margin-bottom:0}.exercise-question{font-size:16px;font-weight:600}.exercise-options{display:grid;gap:10px}.option{min-height:46px;padding:12px 15px;border:1px solid #cdd6ce;background:var(--white);text-align:left;border-radius:9px;font-size:15px;white-space:normal;overflow-wrap:anywhere}.option:hover{background:#eef4ef}.option[aria-pressed=true]{border-color:var(--teal);background:#e3efea;box-shadow:inset 3px 0 var(--teal)}.feedback{font-size:14px;color:#2b5552;margin-top:12px;margin-bottom:12px}.feedback:empty{display:none}details summary{cursor:pointer;font-size:13px;color:var(--teal);padding:11px 0;min-height:44px}details p{font-size:14px}.home-section{border-top:1px solid var(--line);padding:50px 0}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:25px;margin-bottom:30px}.section-heading h2{margin-bottom:0}.section-heading .eyebrow{margin-bottom:12px}.section-heading>p{font-size:13px;color:var(--muted);margin-bottom:0}.hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.hub-card{border:1px solid var(--line);background:#eef3ed;border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}.hub-card.orange{background:#f6efe5}.hub-card.blue{background:#edf0f4}.hub-number{display:flex;gap:12px;align-items:center;justify-content:space-between;color:var(--muted);font-size:11px;margin-bottom:32px;letter-spacing:.05em}.hub-number span{font-size:15px;letter-spacing:.04em}.hub-card h3 a{color:var(--ink);text-decoration:none}.hub-card h3 a span{font-weight:400;font-size:16px}.hub-card>p{font-size:14px;color:var(--muted)}.hub-feature{display:block;border-top:1px solid #cdd7ce;padding:17px 0 0;margin-top:auto;font-size:14px;font-weight:600;text-decoration:none}.hub-feature:hover{text-decoration:underline}.learning{display:grid;grid-template-columns:1fr 1fr;gap:100px;padding-top:60px;padding-bottom:60px}.learning>div>p:not(.eyebrow){font-size:15px;color:var(--muted);max-width:450px}.learning-steps{list-style:none;padding:0;margin:0;display:grid;gap:28px}.learning-steps li{display:flex;gap:22px;border-bottom:1px solid var(--line);padding-bottom:20px}.learning-steps li>span{border:1px solid var(--line);width:38px;height:38px;display:grid;place-items:center;flex-shrink:0;border-radius:50%;font-size:11px;color:var(--teal)}.learning-steps h3{font-size:17px;margin:7px 0 6px}.learning-steps p{font-size:14px;color:var(--muted);margin:0}.scope-note{border:1px solid var(--line);border-radius:var(--radius);padding:26px 30px;margin-bottom:50px;display:flex;align-items:center;gap:35px;background:var(--white)}.scope-note p{font-size:14px;color:var(--muted);margin:0}.scope-note strong{color:var(--ink)}.scope-note a{flex-shrink:0;font-size:13px;padding:10px 0}.site-footer{max-width:1176px;margin:0 auto;border-top:1px solid var(--line);padding:35px 0 45px;display:flex;justify-content:space-between;gap:30px;font-size:13px;color:var(--muted)}.footer-brand{font-weight:700;color:var(--ink);text-decoration:none;font-size:16px}.site-footer p{margin:12px 0 0}.site-footer nav{display:flex;gap:20px;flex-wrap:wrap;align-content:flex-start;max-width:440px}.site-footer nav a{padding:10px 0;font-size:12px}.small{font-size:12px;color:var(--muted)}.hub-page{max-width:1100px;margin:65px auto 80px;padding:0 24px}.hub-page h1{max-width:800px}.hub-deck{max-width:700px;color:var(--muted)}.lesson-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin:35px 0}.lesson-card{padding:28px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink);display:flex;flex-direction:column}.lesson-card h3{font-size:26px}.lesson-card p:not(.eyebrow){font-size:15px;color:var(--muted)}.lesson-card:hover{border-color:var(--teal)}.card-bottom{margin-top:auto;border-top:1px solid var(--line);padding-top:15px;display:flex;justify-content:space-between;font-size:14px;color:var(--teal)}.lesson-layout{max-width:1060px;margin:38px auto 70px;padding:0 24px;display:grid;grid-template-columns:minmax(0,720px) 190px;gap:62px}.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;margin-bottom:35px}.lesson-heading h1{font-size:clamp(2rem,4vw,3.2rem)}.lesson-deck{color:var(--muted);font-size:17px}.lesson-heading .eyebrow{margin-bottom:15px}.quick-answer{background:#eaf1e9;border:1px solid #cbdccf;border-radius:var(--radius);padding:28px;margin-top:28px}.quick-answer .eyebrow{margin-bottom:14px}.quick-answer>.phrase{border-top:1px solid #cbdccf;padding-top:18px;margin:18px 0}.quick-answer .zh{font-size:28px}.condition{font-size:14px;color:#42544a;margin-bottom:0}.copy{display:inline-flex;align-items:center;gap:18px;min-height:44px;padding:7px 13px;margin-top:15px;border-radius:7px;border:1px solid #bdcfc4;background:var(--white);color:var(--teal);font-size:12px}.copy:hover{background:#e9f1ea}.lesson-tools{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin:17px 0 32px}.lesson-tools button{border:1px solid var(--line);border-radius:7px;background:var(--white);padding:9px 14px;min-height:44px;font-size:13px}.lesson-tools a{font-size:13px;min-height:44px;padding:9px 0}.lesson section:not(.quick-answer){margin-top:43px}.lesson section>h2{font-size:27px}.context-list{font-size:14px;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px}.context-list div{display:grid;grid-template-columns:135px 1fr;gap:15px;padding:8px 0}.context-list dt{color:var(--muted)}.context-list dd{margin:0}.diagram{border:1px solid var(--line);background:var(--white);border-radius:12px;padding:16px;margin:25px 0}.diagram figcaption{font-size:12px;color:var(--muted);padding-top:12px}.dialogue{display:grid;gap:20px;margin:20px 0}.dialogue-row{max-width:90%;justify-self:start}.dialogue-row.is-yours{justify-self:end}.speaker{font-size:12px;color:var(--muted);margin-bottom:5px}.is-yours .speaker{text-align:right}.audio-note{font-size:13px;color:var(--muted);border-left:3px solid #b6cbbd;padding:8px 16px}.meaning-section>.phrase{margin-top:16px;padding:15px 18px;background:var(--white);border-left:3px solid #cfddd1}.reply-stack{display:grid;gap:16px}.reply-card{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:24px}.reply-card h3{font-size:15px;letter-spacing:0;color:var(--teal);margin-bottom:18px}.reply-card>p{font-size:15px;margin:18px 0 0}.followup{padding:20px 0;border-top:1px solid var(--line)}.followup h3{font-size:18px}.followup>p{font-size:15px;color:var(--muted)}.followup .phrase{padding-left:18px;border-left:3px solid #c7d9cd}.takeaway{background:#eaf1e9;border-radius:12px;padding:28px}.takeaway p{font-size:15px}.takeaway .small{margin-top:20px;font-size:12px}.lesson-sidebar{position:sticky;top:30px;align-self:start;padding-top:75px}.lesson-sidebar nav{display:grid;gap:6px;margin-bottom:25px}.lesson-sidebar a{font-size:13px;display:block;padding:8px 0;text-decoration:none}.lesson-sidebar a:hover{text-decoration:underline}.lesson-sidebar .eyebrow{margin-bottom:14px}.info-page{max-width:720px;margin:65px auto 90px;padding:0 24px}.info-page h1{font-size:clamp(2.25rem,4vw,3.2rem);margin-bottom:30px}.info-page h2{font-size:23px;margin:36px 0 17px}.copy-status{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);width:max-content;max-width:calc(100% - 32px);background:#1f3530;color:white;border-radius:10px;padding:12px 18px;font-size:13px;z-index:10;box-shadow:0 4px 25px #10231d20}.copy-status:empty{display:none}.hide-pinyin .pinyin{display:none}
@media(max-width:1100px){.site-footer{margin:0 32px}.hero{gap:35px}.hero-copy>.text-link{display:block;margin:10px 0 0}.lesson-layout{gap:30px;grid-template-columns:minmax(0,720px) 160px}.learning{gap:55px}.hub-card{padding:22px}}
.mobile-menu,.mobile-contents{display:none}
.site-header .desktop-nav a,.site-footer nav a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.lesson-sidebar a{min-height:44px;font-size:14px}
.hero-demo::before{inset:-24px}
.quick-start{margin:22px 0;border:1px solid var(--line);border-radius:12px;background:var(--white);overflow:hidden}
.quick-start>p{font-size:13px;font-weight:600;color:var(--muted);margin:0;padding:12px 16px 8px}
.quick-start>a{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:48px;padding:11px 16px;font-size:15px;text-decoration:none;border-top:1px solid var(--line)}
.quick-start>a:hover{background:#eaf1e9}
.hero-copy>.text-link{margin-left:0}
.quick-answer>.phrase{border:0;padding-top:0;margin:12px 0 18px}
.quick-answer>.copy{margin-top:0}
.quick-answer .condition{margin-bottom:16px;font-size:15px}
.quick-summary{border-top:1px solid #cbdccf;padding-top:18px;margin:20px 0 0;font-size:15px}
.lesson-meta{display:flex;align-items:center;flex-wrap:wrap;gap:4px 16px;margin-bottom:12px}
.lesson-meta>a{display:inline-flex;align-items:center;min-height:44px;font-size:13px}
.option .pinyin{display:block;font-size:14px;line-height:1.6;color:var(--muted);margin-top:7px;font-weight:400}
.hide-pinyin .option .pinyin{display:none}
@media(pointer:coarse){
  a,button,summary{-webkit-tap-highlight-color:rgba(47,111,109,.14)}
  .phrase .pinyin{font-size:15px}
  .copy,.lesson-tools button,.lesson-tools a{min-height:48px;font-size:14px}
}
@media(max-width:800px){
  h1,h2,h3,p,dd,a,button{overflow-wrap:anywhere}
  .site-header{position:relative;padding:16px 20px;align-items:center;flex-wrap:nowrap;gap:16px}
  .site-header .brand{min-width:0;flex:1}
  .brand-mark{flex-shrink:0}
  .site-header .desktop-nav{display:none}
  .mobile-menu{display:block;max-width:45%;flex-shrink:0}
  .mobile-menu>summary{min-width:70px;min-height:46px;border:1px solid var(--line);border-radius:9px;padding:11px 12px;font-size:14px;background:var(--white);color:var(--ink)}
  .mobile-menu[open]>summary{border-color:var(--teal)}
  .site-header .mobile-menu nav{position:absolute;z-index:15;left:20px;right:20px;top:calc(100% - 1px);display:grid;gap:4px;padding:10px;background:var(--white);border:1px solid var(--line);border-radius:12px;box-shadow:0 14px 35px #233d2b20}
  .site-header .mobile-menu nav a{display:block;padding:12px;min-height:48px;font-size:15px;border-radius:7px}
  .site-header .mobile-menu nav a:hover{background:#eaf1e9}
  .site-header .mobile-menu:not([open]) nav{display:none}
  .hero{grid-template-columns:1fr;padding:32px 0 42px;gap:30px}
  .hero h1{font-size:clamp(2rem,6vw,3rem);margin-bottom:18px}
  .hero .eyebrow{margin-bottom:16px;font-size:11px}
  .hero-lead{font-size:17px;margin-bottom:16px}
  .hero-copy>.text-link{display:inline-block;margin-left:0}
  .hero-meta{font-size:12px;gap:8px;margin-top:10px}
  .hero-meta span:not(:last-child)::after{margin-left:8px}
  .hero-demo{max-width:560px;width:100%;justify-self:center}
  .hero-demo::before{inset:-15px}
  .hero>*,.learning>*{min-width:0}
  .quick-start{margin:18px 0}
  .quick-start>a{font-size:16px;min-height:50px}
  .phrase .pinyin{font-size:15px;line-height:1.65}
  .phrase .translation{font-size:16px}
  .hub-grid{grid-template-columns:1fr}
  .hub-card{padding:25px}
  .hub-number{margin-bottom:22px;flex-wrap:wrap}
  .hub-card>p{font-size:16px}
  .hub-feature{font-size:15px;min-height:48px}
  .section-heading{align-items:flex-start;flex-direction:column;gap:15px}
  .section-heading>p{font-size:15px}
  .section-heading>p br{display:none}
  .learning{grid-template-columns:1fr;gap:25px}
  .learning>div>p:not(.eyebrow),.learning-steps p{font-size:16px}
  .scope-note{flex-direction:column;align-items:flex-start;gap:12px}
  .scope-note p{font-size:15px}
  .site-footer{flex-direction:column}
  .site-footer nav{gap:4px 18px}
  .site-footer nav a{font-size:14px;min-height:44px;display:inline-flex;align-items:center}
  .lesson-layout{display:block;max-width:770px;margin-top:20px}
  .lesson-sidebar{display:none}
  .breadcrumbs{margin-bottom:18px;font-size:14px;gap:10px;align-items:center}
  .breadcrumbs a{display:inline-flex;align-items:center;min-height:44px}
  .lesson-heading h1{font-size:clamp(1.8rem,5vw,2.5rem);margin-bottom:16px}
  .lesson-deck{font-size:16px;line-height:1.5;margin-bottom:10px}
  .lesson-meta>.small{font-size:13px}
  .lesson-meta>a{font-size:14px}
  .quick-answer{margin-top:18px}
  .quick-answer .eyebrow{margin-bottom:10px}
  .quick-summary{font-size:16px}
  .copy,.lesson-tools button,.lesson-tools a{font-size:14px;min-height:48px}
  .lesson-tools{gap:12px 18px;margin:16px 0}
  .lesson-tools a{display:inline-flex;align-items:center}
  .mobile-contents{display:block;border:1px solid var(--line);border-radius:10px;background:var(--white);padding:0 16px;margin:16px 0 25px}
  .mobile-contents>summary{font-size:15px;min-height:48px;padding:12px 0}
  .mobile-contents nav{display:grid;border-top:1px solid var(--line);padding:6px 0}
  .mobile-contents nav a{font-size:15px;padding:10px 0;min-height:46px;text-decoration:none}
  .mobile-contents:not([open]) nav{display:none}
  .context-list{font-size:16px}
  .speaker,.diagram figcaption,.audio-note{font-size:14px}
  .reply-card>p,.followup>p,.takeaway p{font-size:16px}
  .reply-card h3{font-size:16px}
  .exercise-question,.option,details p{font-size:16px}
  .option{min-height:52px;padding:14px 16px}
  .feedback{font-size:15px}
  .exercise summary{font-size:14px;min-height:48px}
  .lesson-grid{grid-template-columns:1fr}
  .hub-page{margin-top:32px}
  .info-page{margin-top:32px}
  .copy-status{bottom:calc(16px + env(safe-area-inset-bottom,0px));font-size:14px;pointer-events:none}
}
@media(max-width:430px){
  body{font-size:17px}
  .home{padding:0 20px}
  .hero h1{font-size:2rem}
  .hero-demo{padding:18px}
  .demo-top .small{margin-left:0;font-size:12px}
  .phrase .zh{font-size:22px}
  .bubble{padding:15px}
  .home-section{padding:35px 0}
  .scope-note{padding:22px}
  .site-footer{margin:0 20px}
  .lesson-layout{padding:0 20px}
  .quick-answer{padding:20px}
  .quick-answer .zh{font-size:24px}
  .context-list div{grid-template-columns:1fr;gap:4px}
  .dialogue-row{max-width:95%}
  .reply-card{padding:20px}
  .takeaway{padding:22px}
  .hub-page,.info-page{padding:0 20px}
  .hub-page h1{font-size:2rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.audio-player{margin:12px 0 16px;max-width:100%;min-width:0}
.audio-label{font-size:11px;font-weight:700;letter-spacing:.1em;margin:0 0 10px;color:var(--teal)}
.audio-player audio{display:block;width:100%;max-width:340px;height:44px}
.audio-player [hidden]{display:none!important}
.audio-fallback{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.audio-custom{max-width:360px}
.audio-control-row{display:grid;grid-template-columns:minmax(0,1fr) auto 44px;gap:8px;align-items:center}
.audio-control-row button{min-height:44px;font-size:14px;border:0;border-radius:9px;padding:6px;background:transparent}
.audio-play{display:flex;align-items:center;justify-content:flex-start;gap:5px;color:var(--teal);font-weight:650;min-width:0;text-align:left}
.audio-play span{min-width:0;overflow-wrap:anywhere}
.audio-play svg{width:21px;height:21px;fill:currentColor;flex-shrink:0}
.audio-play .audio-pause-icon{display:none}
.is-playing .audio-play-icon{display:none}
.is-playing .audio-pause-icon{display:block}
.audio-control-row button:hover{background:#dce9e3}
.audio-time{font-size:12px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.audio-control-row .audio-speed{font-size:13px;border:1px solid var(--line);background:var(--white)}
.audio-speed[aria-pressed="true"]{background:#dce9e3;border-color:var(--teal);color:var(--teal)}
.audio-progress{height:3px;background:var(--line);border-radius:3px;overflow:hidden;margin-top:3px}
.audio-progress>span{display:block;height:100%;width:0;background:var(--teal)}
.audio-call{padding:18px;background:#eef3ef;border:1px solid #d2e0d7;border-radius:14px}
.audio-call .audio-custom{max-width:none}
.audio-seek{width:100%;height:44px;margin:2px 0 0;accent-color:var(--teal);cursor:pointer}
.audio-seek:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.audio-follow{font-size:13px;line-height:1.5;margin:0;min-height:39px;color:var(--muted)}
.dialogue-row.is-listening>.bubble{box-shadow:inset 0 0 0 2px var(--teal)}
.dialogue-row.is-listening>.speaker{color:var(--teal);font-weight:700}
.audio-play[aria-busy="true"]{opacity:.7}
.audio-error:empty{display:none}
.audio-error{font-size:14px;color:#82442f}
@media print{.audio-player{display:none!important}}
.lesson-paths{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0}
.lesson-paths a,.next-step{display:flex;flex-direction:column;gap:5px;text-decoration:none;border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--white);min-width:0}
.lesson-paths strong,.next-step strong{font-size:15px}
.lesson-paths span,.next-step span{font-size:14px;color:var(--muted);line-height:1.5}
.lesson-paths a:hover,.next-step:hover{border-color:var(--teal);background:#eef4ef}
.task-grid{display:grid;gap:14px;margin:20px 0}
.task-item{padding:22px;border:1px solid var(--line);border-radius:12px;background:var(--white)}
.task-item h3{font-size:19px;letter-spacing:-.02em}
.task-item>p{font-size:16px;margin-bottom:0}
.task-item .phrase{padding-left:14px;border-left:3px solid #c7d9cd;margin-bottom:18px}
.task-item .text-link{margin-top:12px}
.show-card{border:1px solid #cbdccf;border-radius:12px;padding:4px 20px;background:#eaf1e9;margin:20px 0}
.show-card>summary,.listen-transcript>summary{min-height:48px;font-size:15px}
.display-line{padding:24px 0}
.display-line .zh{font-size:clamp(30px,6vw,44px);line-height:1.5}
.show-card:not([open])>*:not(summary),.listen-transcript:not([open])>*:not(summary){display:none}
.listen-transcript{border:1px solid var(--line);border-radius:10px;padding:0 16px;margin:10px 0 18px}
.listen-transcript .phrase{padding-bottom:18px}
.next-steps{display:grid;gap:12px}
.next-steps h2{margin-bottom:4px}
.review-note{border-top:1px solid var(--line);padding-top:24px;font-size:15px;color:var(--muted)}
.review-note h2{color:var(--ink)}
@media(max-width:430px){.lesson-paths{grid-template-columns:1fr}.task-item{padding:18px}.show-card{padding:4px 16px}}
@media print{.lesson-paths,.next-steps,.show-card>summary{display:none!important}.show-card .display-line{display:block!important}}
@media print{.site-header nav,.site-footer,.lesson-sidebar,button,.exercise-options,.copy-status,.lesson-tools{display:none!important}.lesson-layout{display:block}.quick-answer,.bubble,.reply-card,.takeaway{break-inside:avoid;border:1px solid #aaa}body{background:white;color:black}.home,.lesson-layout,.info-page{max-width:none}a{color:inherit}}