@charset "UTF-8";
:root{--cream:#faf8f0;--forest:#184d3e;--deep:#163c31;--ink:#283f34;--muted:#6e7a6c;--line:#dfe2d4;--amber:#efa931;--sage:#e6ecd9;--serif:Georgia,"Songti SC","Noto Serif CJK SC",serif;--sans:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--cream);color:var(--ink);font-family:var(--sans);font-size:15px;-webkit-font-smoothing:antialiased;overflow-x:clip}
button,a,input{ -webkit-tap-highlight-color:transparent}
button{font:inherit;cursor:pointer}
a{color:inherit;text-decoration:none}
button{color:inherit}
img{max-width:100%;display:block}
button,a,summary{touch-action:manipulation}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--amber);outline-offset:5px}
button:disabled{cursor:default}
::selection{background:#eec478;color:var(--deep)}
button{border:0}
p,h1,h2,h3{margin:0}
.section-wrap{max-width:1240px;margin-inline:auto;padding-inline:48px}
.header{height:100px;max-width:1340px;padding:0 48px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:25px}
.brand{display:flex;align-items:center;gap:5px;flex-shrink:0}
.brand img{object-fit:contain}
.brand-word{font-family:var(--serif);font-size:29px;font-weight:bold;letter-spacing:-1.5px;line-height:1}
.brand-cn{display:block;font-family:var(--sans);font-size:10px;letter-spacing:3px;font-weight:500;margin-top:6px;padding-left:3px}
.header nav{display:flex;align-items:center;gap:30px;font-size:13px}
.header nav a{padding-block:8px;position:relative}
.header nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--forest);transform:scaleX(0);transition:transform .2s}
.header nav a:hover::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:24px}
.language{padding:10px 0;background:none;font-size:12px;letter-spacing:1px}
.language span{margin-left:4px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:30px;background:var(--forest);color:#fffdf6;padding:18px 25px;border-radius:6px;font-size:14px;line-height:1.4;transition:background .2s,transform .2s}
.button:hover{background:#0c382a;transform:translateY(-2px)}
.button span[aria-hidden]{font-size:19px;line-height:1}
.button-small{padding:12px 18px;font-size:12px;gap:20px}
.text-link{display:inline-flex;align-items:center;gap:15px;font-size:13px}
.text-link:hover{color:#927028}
.text-link span[aria-hidden]{font-size:20px}
.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:60px;padding-block:66px 40px;min-height:660px}
.eyebrow{font-size:11px;letter-spacing:1.4px;line-height:1.7;color:var(--forest);font-weight:600}
.hero .eyebrow{display:flex;align-items:center;gap:10px}
.small-leaf{width:13px;height:19px;background:#8f9e6d;border-radius:100% 0 100% 0;transform:rotate(15deg)}
h1{font-family:var(--serif);font-size:clamp(38px,4.1vw,57px);font-weight:500;line-height:1.35;letter-spacing:-2px;margin-top:28px;color:var(--deep)}
.hero-emphasis{position:relative;z-index:0;white-space:nowrap}
.hero-emphasis::after{content:"";position:absolute;bottom:5px;left:0;right:0;height:9px;background:#edd6a0;border-radius:50%;transform:rotate(-1deg);z-index:-1}
.hero-description{font-size:14px;line-height:2.1;color:var(--muted);margin-top:25px;max-width:440px}
.hero-actions{margin-top:34px;display:flex;align-items:center;gap:25px}
.hero-note{display:flex;align-items:center;gap:8px;margin-top:23px;font-size:11px;color:var(--muted)}
.status-dot{height:6px;width:6px;border-radius:50%;background:#8b9c67;flex-shrink:0}
.hero-bottom{margin-top:60px;display:flex;align-items:center;justify-content:space-between;max-width:345px;color:#82917b;font-size:9px;letter-spacing:2.5px}
.hero-bottom span:last-child{font-size:23px;line-height:1}
.hero-stage{position:relative;padding:20px 10px 10px;isolation:isolate}
.hero-stage::before{content:"";position:absolute;width:112%;height:94%;background:#e8ecdd;border-radius:50% 48% 45% 50%;z-index:-2;top:0;left:-7%;transform:rotate(-10deg)}
.orbit{position:absolute;border:1px solid #d6ddc8;width:110%;height:102%;border-radius:48%;top:-5%;left:-7%;z-index:-1;transform:rotate(16deg)}
.orbit-two{width:97%;height:117%;transform:rotate(-25deg);left:0;top:-8%;border-color:#e3e5d4}
.floating-note{position:absolute;right:-24px;top:-20px;z-index:2;transform:rotate(9deg);background:#eed7a3;padding:16px 23px;border-radius:2px;box-shadow:0 5px 12px #414d3120;display:flex;flex-direction:column;gap:4px}
.floating-note i{font-family:var(--serif);font-size:18px}
.floating-note span{font-size:9px;letter-spacing:2px;color:#756641}
.dictionary-card{position:relative;background:#fffdf9;border:1px solid #fff;box-shadow:0 22px 60px #334c3620,0 2px 8px #334c3608;border-radius:12px;overflow:hidden;transform:rotate(-2deg)}
.card-chrome{padding:16px 22px;border-bottom:1px solid #ecece2;display:flex;justify-content:space-between;align-items:center;font-size:10px;gap:12px}
.mini-brand{display:flex;align-items:center;gap:6px;letter-spacing:.4px}
.mini-brand img{width:22px;height:22px}
.demo-badge{color:#8a8c7c;font-size:9px;white-space:nowrap}
.word-tabs{display:flex;gap:7px;padding:19px 26px 0}
.card-swing{transform-origin:50% 14px}
.word-tab{font-size:11px;background:transparent;padding:6px 12px;border-radius:20px;color:#7a8373;border:1px solid transparent}
.word-tab.active{color:var(--forest);background:#eef1e5;border-color:#e0e5d3}
.word-tab:hover{background:#f4f2e8}
.word-pages{position:relative;perspective:1000px;isolation:isolate}
.word-page{background:#fffdf9;backface-visibility:hidden;transform-origin:0 50%;will-change:auto}
.word-page.turning{will-change:transform,opacity}
.word-page.departing{position:absolute;inset:0;z-index:1;pointer-events:none;transform-origin:0 50%;box-shadow:10px 0 24px #17382f12}
.word-page.departing::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 55%,#d3d2bb26 90%,#fffdf9a0);pointer-events:none}
.word-top{display:flex;justify-content:space-between;align-items:center;padding:24px 28px 0}
.word-type{font-size:10px;color:#8d9584;letter-spacing:.8px}
.word-top h2{font-family:var(--serif);font-size:49px;letter-spacing:-1.8px;font-weight:400;line-height:1.25;margin-top:1px}
.word-dot{color:var(--amber)}
.bookmark{background:transparent;padding:11px;border:1px solid #e6e8dc;border-radius:50%;margin-top:14px;width:43px;height:43px;display:grid;place-items:center}
.bookmark svg{width:18px;height:18px;fill:none;stroke:var(--forest);stroke-width:1.5;stroke-linejoin:round}
.bookmark[aria-pressed=true]{background:#f8e9c9;border-color:#e6c67e}
.bookmark[aria-pressed=true] svg{fill:var(--amber)}
.phonetics{display:flex;align-items:center;gap:12px;padding:7px 28px 20px;font-size:12px;color:#7f8778;flex-wrap:wrap}
.audio-note{font-size:9px;padding:4px 8px;border:1px solid #e5e7da;border-radius:20px;color:#62715d}
.word-meaning{display:flex;gap:12px;padding:0 28px;font-size:12px;line-height:1.65;min-height:64px}
.sense-number{font-size:9px;margin-top:4px;color:#97a58c}
.definition-cn{font-size:12px;color:#78836f;margin-top:5px}
.word-picture{position:relative;margin:19px 28px 0;border-radius:6px;overflow:hidden}
.word-picture img{width:100%;height:133px;object-fit:cover}
.word-picture span{position:absolute;bottom:12px;left:16px;color:#fffbed;font-family:var(--serif);font-style:italic;font-size:15px}
.word-example{padding:18px 28px 19px;font-size:12px;line-height:1.65;min-height:99px}
.word-example p:last-child{font-size:10px;color:#8b917f;margin-top:5px}
.card-foot{display:flex;align-items:center;justify-content:space-between;padding:12px 28px;border-top:1px solid #ecece2;font-size:9px;color:#8a917e}
.card-leaf{color:#b4b785;font-size:16px}
.stage-caption{font-size:9px;text-align:center;color:#7d8972;margin-top:22px;line-height:1.5}
.motion-hint{display:none;margin-bottom:5px}
@media(hover:hover) and (pointer:fine){.motion-hint{display:block}}
@media(prefers-reduced-motion:reduce){.motion-hint{display:none}}
.values-strip{border-block:1px solid var(--line);margin-top:44px}
.values-strip>div{display:flex;justify-content:space-between;gap:20px;padding-block:25px;font-size:11px;letter-spacing:.5px;color:#65745d}
.values-strip span:first-child{color:#a1a68f;font-size:10px}
.experience{padding-block:96px 80px}
.section-heading{position:relative}
h2{font-family:var(--serif);font-size:38px;line-height:1.4;letter-spacing:-1px;font-weight:500;color:var(--deep)}
.section-heading h2{margin-top:18px}
.muted-heading{color:#8c9a76}
.section-heading>p:last-child{position:absolute;right:0;bottom:10px;max-width:370px;font-size:13px;color:var(--muted);line-height:2}
.feature-row{margin-top:52px;display:grid;grid-template-columns:repeat(3,1fr);gap:50px}
.feature{position:relative}
.feature:not(:last-child)::after{content:"";position:absolute;right:-25px;top:12px;bottom:0;width:1px;background:var(--line)}
.feature-symbol{height:105px;margin-bottom:24px;position:relative;display:flex;align-items:center;justify-content:flex-start;color:var(--forest)}
.type-symbol{font-family:var(--serif);font-size:72px;letter-spacing:-6px;line-height:1}
.type-symbol>span{font-family:var(--sans);font-size:24px;letter-spacing:0;margin:35px 0 0 24px;position:relative}
.type-symbol>span::before{position:absolute;content:"";background:#e6ead7;border-radius:50%;width:56px;height:56px;top:-14px;left:-17px;z-index:-1}
.note-symbol{flex-direction:column;align-items:flex-start;justify-content:center;padding-left:10px;transform:rotate(-3deg)}
.note-symbol>span:first-child{font-family:var(--serif);font-size:19px}
.note-symbol i{background:#f0dfb8;padding:2px 5px}
.note-line{display:block;width:180px;height:1px;background:#b5c0a2;margin-top:14px}
.note-line.short{width:140px}
.review-symbol{gap:21px;padding-left:5px;padding-bottom:20px}
.review-symbol>span{background:#e5ebd9;width:42px;height:42px;border-radius:50%;font-family:var(--serif);font-size:20px;display:grid;place-items:center}
.review-symbol>span:nth-child(2){background:#f0dfb8;transform:translateY(-12px)}
.review-symbol svg{position:absolute;width:160px;height:35px;bottom:0;left:5px;fill:none;stroke:#95a482;stroke-width:1.5}
h3{font-size:18px;line-height:1.5;font-weight:500;letter-spacing:-.4px}
.feature p{margin-top:14px;font-size:12px;color:var(--muted);line-height:2;max-width:295px}
.feature-foot{display:block;font-size:10px;color:#8c957d;margin-top:22px;letter-spacing:.4px}
.review-section{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center;padding-block:45px 65px;border-bottom:1px solid var(--line)}
.review-copy h2{font-size:32px;margin-top:18px}
.review-copy>p:last-child{font-size:12px;color:var(--muted);line-height:2;margin-top:18px;max-width:370px}
.review-demo{background:#e8eddd;border:1px solid #dfe5d2;border-radius:10px;text-align:center;padding:23px 30px 28px;min-height:265px;position:relative}
.review-demo-top{font-size:9px;display:flex;justify-content:space-between;color:#7e8d71;letter-spacing:1px}
.review-word{font-family:var(--serif);font-size:42px;margin:24px 0 10px;line-height:1.2}
#review-prompt,#review-answer{font-size:12px;color:#728068;line-height:1.7}
.review-translation{font-size:11px}
.button-light{background:#fffdf6;color:var(--forest);padding:11px 25px;font-size:11px;margin-top:22px}
.button-light:hover{background:#f7e5b8;color:var(--forest)}
.collections{padding-block:90px}
.collections-header{display:flex;align-items:flex-end;justify-content:space-between;gap:50px;margin-bottom:45px}
.collections-header h2{margin-top:16px}
.collection-intro{max-width:390px}
.pill{display:inline-block;border:1px solid #ccd4bf;border-radius:20px;padding:5px 11px;font-size:9px;line-height:1.5;color:#687a55;white-space:nowrap}
.collection-intro p{margin-top:14px;font-size:12px;line-height:2;color:var(--muted)}
.bookshelf{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.pack{min-height:326px;border-radius:3px 8px 8px 3px;position:relative;text-align:left;padding:28px 24px 23px 35px;overflow:hidden;box-shadow:4px 5px 0 #2649330a;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.pack:hover{transform:translateY(-8px) rotate(-1deg);box-shadow:6px 12px 0 #2649330d}
.pack::before{content:"";position:absolute;top:0;left:15px;bottom:0;width:1px;background:#ffffff30}
.pack-core{background:#245641;color:#fbf8e6}
.pack-school{background:#e6d8b5;color:#545a3b}
.pack-extended{background:#dbe2d0;color:#405c49}
.pack-ielts{background:#d7dce3;color:#40556a}
.pack-bigbang{background:#e9dcdf;color:#65505d}
.pack-minecraft{background:#dce4ce;color:#455d40}
.book-spine{position:absolute;left:4px;top:30px;writing-mode:vertical-rl;font-size:7px;letter-spacing:2px;opacity:.6}
.pack-series{font-size:8px;letter-spacing:.5px;line-height:1.7}
.pack-number{font-family:var(--serif);font-size:43px;line-height:1.2;margin-top:23px;letter-spacing:-1px}
.pack-number>span{display:block;font-family:var(--sans);font-size:9px;letter-spacing:1px;opacity:.75;margin-top:5px}
.pack-text{font-size:40px}
.pack-theme-title{font-size:30px;letter-spacing:-.6px;line-height:1.25}
.pack-subtitle{font-size:10px;line-height:1.6;opacity:.75;margin-top:8px}
.book-science,.book-blocks{width:180px;height:110px;max-width:100%}
.book-science{color:#a17d91}
.pack>img{height:95px;width:95px;margin:20px auto 14px;filter:brightness(0) invert(1);opacity:.75}
.pack-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:11px}
.pack-bottom>span:last-child{font-size:21px}
.book-art{height:110px;position:relative;margin:9px 0 12px;display:flex;align-items:center;justify-content:center}
.book-arcs>i{position:absolute;border:1.5px solid #8d946a;width:58px;height:78px;border-radius:50% 50% 0 0;transform:rotate(-25deg)}
.book-arcs>i:nth-child(2){transform:translateX(20px) rotate(0)}
.book-arcs>i:nth-child(3){transform:translateX(40px) rotate(25deg)}
.book-stars{font-size:83px;color:#749177;gap:0}
.book-stars>span{font-size:44px;transform:translate(-10px,23px);color:#90a289}
.book-orbit i{width:105px;height:63px;border:1px solid #7d94a9;border-radius:50%;position:absolute;transform:rotate(-30deg)}
.book-orbit i:nth-child(2){transform:rotate(30deg)}
.book-orbit>span{font-size:37px;color:#698699}
.collection-notes{display:flex;gap:30px;justify-content:space-between;font-size:9px;color:#89907d;margin-top:24px;line-height:1.8}
.collection-notes>p{max-width:48%}
.personal-banner{display:flex;align-items:center;gap:28px;background:#f0f1e7;padding:30px;border-radius:8px;margin-top:40px}
.personal-mark{display:flex;align-items:center;gap:10px;flex-shrink:0;font-size:10px;color:#6b7d59}
.personal-mark span:first-child,.personal-mark span:last-child{border:1px solid #c9d0bc;width:43px;height:56px;display:grid;place-items:center;border-radius:4px;background:#f8f8ee;transform:rotate(-6deg)}
.personal-mark span:last-child{transform:rotate(6deg);background:#e7d9b4}
.personal-banner h3{font-size:15px}
.personal-banner p{font-size:11px;color:var(--muted);line-height:1.9;margin-top:7px;max-width:620px}
.personal-banner>.pill{margin-left:auto;align-self:flex-start}
.questions{display:grid;grid-template-columns:1fr 1.6fr;gap:75px;padding-block:30px 90px}
.questions h2{margin-top:18px}
.faq-deer{margin:26px 0 0 -15px;opacity:.85}
.faq-list{border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);padding:21px 0}
summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:14px;font-weight:500;line-height:1.6}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:23px;font-weight:300;color:#879578;flex-shrink:0}
details[open]>summary::after{content:"−"}
details p{font-size:12px;color:var(--muted);line-height:2;margin:15px 28px 0 0}
.download{background:var(--forest);color:var(--cream);border-radius:15px;padding-block:55px 48px;text-align:center;max-width:1144px;position:relative;overflow:hidden}
.download::before,.download::after{content:"";width:300px;height:450px;border:1px solid #ffffff15;border-radius:50%;position:absolute;left:-190px;top:50px;transform:rotate(-30deg);pointer-events:none}
.download::after{left:auto;right:-200px;transform:rotate(30deg)}
.download-brand{display:flex;align-items:center;justify-content:center;gap:13px;margin-bottom:18px}
.download-brand img{width:58px;height:58px}
.download .pill{border-color:#ffffff40;color:#c4d1b7}
.download h2{color:#fffcec;font-size:41px;line-height:1.45}
.download>p{font-size:12px;color:#c4d1bd;margin-top:17px;line-height:1.8}
.platforms{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:31px}
.platforms>button{background:#ffffff0c;border:1px solid #ffffff40;color:#f8f8e9;border-radius:5px;padding:14px 18px;display:flex;align-items:center;gap:13px;font-size:12px;transition:background .2s}
.platforms>button:hover{background:#ffffff24}
.platforms>button span:first-child{font-size:20px;line-height:1}
.platforms>button span:last-child{font-size:16px;margin-left:8px;color:#b4c5a2}
.download>p.download-note{font-size:9px;margin-top:24px;color:#95ae8d}
.footer{padding-block:64px 24px}
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:25px}
.footer-top>p{font-size:11px;color:#8b9581;letter-spacing:1px}
.footer-word{font-family:var(--serif);font-size:clamp(100px,22vw,278px);letter-spacing:-15px;line-height:1.1;color:#e2e7d5;text-align:center;margin-top:12px;font-weight:normal;overflow:hidden}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:23px;font-size:9px;color:#8d9581}
.footer-bottom>span:last-child{letter-spacing:1.4px}
dialog{border:1px solid #e0e5d5;border-radius:14px;background:var(--cream);color:var(--ink);max-width:500px;width:calc(100% - 40px);padding:0;box-shadow:0 24px 100px #17382f40;max-height:85vh}
dialog::backdrop{background:#163c3160;backdrop-filter:blur(4px)}
.dialog-inner{padding:42px;position:relative}
.dialog-close{position:absolute;right:16px;top:12px;background:transparent;font-size:27px;width:36px;height:36px;color:#738069}
.dialog-inner h2{margin:16px 0;font-size:29px}
#dialog-body{font-size:14px;line-height:1.9;color:#617058}
.dialog-note{border-top:1px solid var(--line);padding-top:17px;margin-top:20px;font-size:11px;line-height:1.9;color:#839076}
.dialog-inner>.button{margin-top:25px;padding:13px 21px;font-size:12px}
.skip-link{position:absolute;top:-80px;left:20px;background:var(--forest);color:white;padding:13px;z-index:10;border-radius:5px}
.skip-link:focus{top:12px}
.noscript{text-align:center;padding:20px;font-size:12px;color:var(--muted)}
[hidden]{display:none!important}
html[lang=en] h1{font-size:61px;line-height:1.17}
html[lang=en] .hero-emphasis{white-space:normal}
html[lang=en] .hero-description{font-size:14px;line-height:1.9}
html[lang=en] h2{line-height:1.25}
html[lang=en] .feature h3{font-family:var(--serif);font-size:23px}
html[lang=en] .personal-mark{font-size:10px}
@media(min-width:1450px){.hero{min-height:710px;padding-block:75px 50px}.hero-stage{max-width:500px}.hero-copy{padding-left:0}}
@media(max-width:1100px){.section-wrap{padding-inline:32px}.header{padding-inline:32px}.hero{gap:40px}.floating-note{right:-12px}.hero-actions{gap:18px}.hero-actions .button{padding:16px 18px;gap:18px}.bookshelf{gap:12px}.pack{padding:26px 18px 20px 28px}.pack-number{font-size:35px}.download{margin-inline:32px}.personal-banner>.pill{display:none}.section-heading>p:last-child{max-width:320px}.header nav{gap:20px}html[lang=en] h1{font-size:52px}}
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