:root{--ink:#17243d;--blue:#2459c9;--cyan:#16a8b7;--gold:#f5bd2b;--white:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--white);font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--white)}.home-page{overflow-x:clip}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible,[role=radio]:focus-visible,summary:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}[hidden]{display:none!important}
.site-header{height:76px;padding:0 clamp(22px,4vw,70px);display:flex;align-items:center;justify-content:space-between;gap:25px;background:var(--white);box-shadow:0 1px 0 #17243d18;position:sticky;top:0;z-index:30}.site-header .brand{min-width:190px}.main-nav{display:flex;gap:clamp(12px,1.65vw,27px);align-items:center;white-space:nowrap}.main-nav a{font-size:14px;font-weight:750;color:var(--ink)}.main-nav a:hover,.main-nav a[aria-current=page]{color:var(--blue)}.header-actions{min-width:150px;display:flex;justify-content:flex-end}.header-actions [data-user] button{border:0;background:var(--blue);color:var(--white);font-weight:800;padding:12px 18px;border-radius:10px;white-space:nowrap}.header-actions [data-user] button:hover{filter:brightness(.9)}
.eyebrow,.section-kicker{font-size:13px;font-weight:900;letter-spacing:.08em;color:var(--blue);margin:0}.eyebrow{border-left:4px solid var(--gold);padding-left:13px}.section{max-width:1320px;margin:0 auto;padding:95px 32px;scroll-margin-top:76px}.section-heading{margin-bottom:35px}.section-heading.center{text-align:center;max-width:770px;margin:0 auto 40px}.section h2,.social-section h2{font-size:clamp(36px,4vw,58px);line-height:1.18;letter-spacing:-.055em;margin:14px 0;color:var(--ink);font-weight:900}.section h2 em{font-style:normal;color:var(--blue)}.section-heading p:not(.section-kicker){font-size:16px;line-height:1.7;color:#17243db0}.button{min-height:56px;display:inline-flex;align-items:center;justify-content:center;gap:22px;border-radius:11px;padding:14px 25px;font-weight:850;transition:transform .2s,box-shadow .2s}.button:hover{transform:translateY(-3px)}.button-primary{background:var(--gold);color:var(--ink);box-shadow:0 5px 0 var(--ink)}
.hero{max-width:1510px;min-height:625px;margin:auto;padding:100px clamp(25px,6vw,100px) 115px;display:grid;grid-template-columns:1fr 1.03fr;align-items:center;gap:5vw;position:relative;overflow-x:clip}.hero-copy{position:relative;z-index:2}.hero h1{font-size:clamp(44px,4.3vw,70px);line-height:1.18;letter-spacing:-.065em;font-weight:950;margin:24px 0 28px}.hero h1 em{font-style:normal;color:var(--blue)}.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:31px}.hero-tags span{font-size:13px;font-weight:800;color:var(--blue);background:#2459c91a;border:1px solid #2459c943;border-radius:100px;padding:8px 12px}.hero-visual{position:relative;margin:10px 0 0;min-width:0;isolation:isolate}.hero-visual:before{content:"";position:absolute;inset:-60px;z-index:-1;background:conic-gradient(from 10deg,#16a8b73b,#2459c94d,#f5bd2b50,#16a8b73b);filter:blur(35px);animation:halo-shift 10s ease-in-out infinite alternate}.hero-image-frame{padding:8px;border-radius:23px;background:var(--white);box-shadow:0 22px 55px #17243d30,0 0 0 1px #2459c950}.hero-image-frame img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:15px}.hero-microduck{position:absolute;z-index:2;width:clamp(60px,7vw,104px);height:auto;right:-35px;top:-70px;filter:drop-shadow(0 15px 14px #17243d55);animation:duck-float 5s ease-in-out infinite}.hero-spark{position:absolute;color:var(--cyan);font-size:28px;text-shadow:0 0 15px var(--cyan);animation:spark-pulse 3s ease-in-out infinite}.spark-one{top:-30px;left:-27px}.spark-two{bottom:-43px;right:30px;color:var(--gold);animation-delay:1.1s}.hero-visual figcaption{position:absolute;left:25px;bottom:-23px;background:var(--ink);color:var(--white);padding:10px 16px;border-radius:8px;font-size:12px;font-weight:750;box-shadow:0 8px 20px #17243d3b}.live-dot{display:inline-block;width:8px;height:8px;background:var(--cyan);border-radius:50%;margin-right:5px;box-shadow:0 0 8px var(--cyan)}
@keyframes halo-shift{to{transform:rotate(11deg) scale(1.08)}}@keyframes duck-float{50%{transform:translateY(-12px)}}@keyframes spark-pulse{50%{opacity:.35;transform:scale(.8)}}
.hero-support{margin:0 0 31px;font-size:17px;font-weight:700;line-height:1.7;color:var(--ink)}.hero-support span{display:block}.hero-support span:first-child{color:var(--blue);font-weight:850}
.benefit-section{display:grid;grid-template-columns:.95fr 1.05fr;gap:5vw;align-items:center;border-top:1px solid #17243d16}.benefit-list{list-style:none;padding:0;margin:30px 0 23px}.benefit-list li{display:flex;gap:17px;align-items:flex-start;padding:16px 0;border-top:1px solid #17243d20}.benefit-list li:last-child{border-bottom:1px solid #17243d20}.benefit-list span{font:900 17px/1.6 ui-monospace,monospace;color:var(--cyan)}.benefit-list p{font-size:16px;font-weight:700;line-height:1.65;margin:0}.benefit-callout{border-left:4px solid var(--gold);background:#f5bd2b24;padding:14px 18px;margin:0;font-size:14px;font-weight:800}.benefit-callout code{font-weight:900;color:var(--blue)}.benefit-visual{position:relative;min-height:430px}.benefit-visual figure{margin:0;position:relative;border:7px solid var(--white);border-radius:20px;overflow:hidden;background:var(--white);box-shadow:0 15px 45px #17243d2b,0 0 0 1px #17243d25}.benefit-game{width:92%}.benefit-game img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.benefit-photo{position:absolute!important;width:42%;right:-6px;bottom:0;transform:rotate(3deg)}.benefit-photo img{display:block;width:100%;aspect-ratio:1.28;object-fit:cover;object-position:right}.benefit-visual figcaption,.coach-visual figcaption{position:absolute;bottom:0;left:0;right:0;background:#17243de8;color:var(--white);font-size:11px;font-weight:800;padding:9px 12px}
.concept-section{border-top:1px solid #17243d16}.concept-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:6vw;align-items:center}.concept-stage{border:2px solid var(--ink);border-radius:22px;overflow:hidden;box-shadow:9px 9px 0 #2459c92b}.concept-stage-top{height:42px;background:var(--ink);color:var(--white);display:flex;align-items:center;justify-content:space-between;padding:0 20px;font:800 11px/1 ui-monospace,monospace;letter-spacing:.08em}.stage-lights{color:var(--gold);letter-spacing:.25em}.concept-art{height:330px;background:linear-gradient(180deg,#2459c913,var(--white) 45%,#16a8b729 45%,#16a8b729 100%);position:relative;overflow:hidden}.concept-art:after{content:"";position:absolute;left:8%;right:8%;bottom:55px;height:2px;background:repeating-linear-gradient(90deg,var(--blue) 0 18px,transparent 18px 35px)}.concept-art img{position:absolute;z-index:2;height:67%;width:auto;left:24%;bottom:30px;filter:drop-shadow(0 10px 7px #17243d38);transition:left .35s}.concept-target{position:absolute;right:13%;top:31%;font-size:60px;color:var(--gold);text-shadow:3px 4px 0 var(--ink)}.concept-bubble{position:absolute;z-index:3;top:32px;left:25px;background:var(--white);border:2px solid var(--ink);border-radius:12px;padding:12px 16px;font-weight:800;box-shadow:4px 4px 0 var(--gold)}.concept-art[data-scene="variables"] img{left:40%}.concept-art[data-scene="loops"] img{left:17%}.concept-art[data-scene="conditionals"] img{left:52%}.concept-code{background:var(--ink);color:var(--white);padding:17px 22px;min-height:70px;align-items:center;display:flex;justify-content:space-between;gap:15px;font-size:14px}.concept-code span{color:var(--cyan);font-weight:800}.concept-code code{color:var(--gold);font-size:14px;white-space:pre-wrap;text-align:right}.carousel-count{font:900 13px/1 ui-monospace,monospace;letter-spacing:.12em;color:var(--cyan)}.concept-copy h3,.audience-copy h3{font-size:clamp(28px,2.7vw,42px);line-height:1.25;letter-spacing:-.04em;margin:20px 0 15px}.concept-copy p,.audience-copy p{font-size:18px;line-height:1.8;color:#17243db8;max-width:440px}.concept-controls,.audience-controls{display:flex;align-items:center;gap:15px;margin-top:32px}.concept-controls>button,.audience-controls>button{width:44px;height:44px;border-radius:50%;background:var(--white);border:1px solid #17243d4f;color:var(--ink);font-size:20px}.concept-controls>button:hover,.audience-controls>button:hover{background:var(--gold)}.carousel-dots{display:flex;gap:7px}.carousel-dots button{width:8px;height:8px;border:0;background:#17243d45;border-radius:50%;padding:0}.carousel-dots button[aria-current="true"]{background:var(--blue);width:22px;border-radius:9px}
.coach-section{display:grid;grid-template-columns:.77fr 1.23fr;gap:5vw;align-items:center;border-top:1px solid #17243d16}.coach-lead{font-size:22px;line-height:1.6;font-weight:750}.coach-copy ul{padding-left:19px;margin:26px 0 0}.coach-copy li{font-size:15px;line-height:1.8;margin:10px 0;color:#17243db8}.coach-copy li::marker{color:var(--cyan)}.coach-visual{margin:0;position:relative;border:8px solid var(--white);border-radius:20px;overflow:hidden;box-shadow:0 17px 45px #17243d30,0 0 0 1px #17243d2b}.coach-visual img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
.language-section{border-top:1px solid #17243d16}.language-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.language-card{border:1px solid #17243d2b;border-top:5px solid var(--cyan);border-radius:17px;padding:28px;min-height:260px;background:var(--white);box-shadow:0 11px 30px #17243d0e}.language-card:nth-child(2){border-top-color:var(--blue)}.language-card:nth-child(3){border-top-color:var(--gold)}.language-index{display:block;font-size:12px;font-weight:850;color:var(--blue);margin-bottom:20px}.language-card strong{font-size:32px;letter-spacing:-.045em}.language-card p{color:#17243db8;line-height:1.75;margin:12px 0 0}
.vision-section{display:grid;grid-template-columns:.8fr 1.2fr;align-items:center;gap:7vw;border-top:1px solid #17243d16}.vision-mark{height:350px;border-radius:40px;background:radial-gradient(circle at 50% 50%,#16a8b72d 0 38%,transparent 39%),linear-gradient(120deg,#2459c919,#f5bd2b23);display:flex;align-items:center;justify-content:center;gap:12px;overflow:hidden}.vision-mark img:first-child{width:31%;max-height:75%;object-fit:contain}.vision-mark img:last-child{width:27%;max-height:72%;object-fit:contain;filter:drop-shadow(0 14px 8px #17243d40)}.vision-mark span{font-size:45px;color:var(--blue);font-weight:300}.vision-copy h2{max-width:670px}.vision-copy>p:not(.section-kicker){font-size:17px;line-height:1.8;color:#17243db8;max-width:590px}.vision-copy>a{display:inline-block;margin-top:15px;font-weight:850;color:var(--blue);border-bottom:2px solid var(--gold);padding-bottom:5px}
.audience-section{border-top:1px solid #17243d16}.audience-carousel{max-width:930px;margin:auto;border:1px solid #17243d22;border-radius:24px;display:grid;grid-template-columns:40% 60%;min-height:460px;overflow:hidden;box-shadow:0 15px 40px #17243d12}.audience-portrait{justify-self:center;align-self:end;width:180px;height:450px;background-image:url('/web/assets/learner-personas-lineup.png');background-repeat:no-repeat;background-size:500% 100%;background-position:0 0}.audience-copy{padding:70px 65px 55px;align-self:center}.audience-copy p{min-height:105px}
.pricing-section{max-width:none;border-top:1px solid #17243d16}.pricing-grid{max-width:1190px;margin:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.plan-card{position:relative;overflow:hidden;border:2px solid #17243d29;border-radius:21px;background:var(--white);padding:52px 28px 30px;min-height:385px;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 10px 25px #17243d0e}.plan-card:hover{transform:translateY(-4px);box-shadow:0 15px 30px #17243d1c}.plan-card.is-selected{border-color:var(--blue);box-shadow:0 13px 28px #2459c92d}.plan-ribbon{position:absolute;top:14px;left:-46px;width:160px;text-align:center;transform:rotate(-42deg);background:var(--gold);color:var(--ink);font-size:12px;font-weight:900;padding:7px 0}.plan-year .plan-ribbon{background:var(--blue);color:var(--white)}.plan-team .plan-ribbon{background:var(--cyan);color:var(--white)}.plan-head{text-align:center}.plan-head h3{font-size:25px;color:var(--ink);margin:0 0 8px}.plan-price-line{display:flex;align-items:baseline;justify-content:center;gap:10px;margin:0;color:#17243d9e}.plan-price{font-size:52px;color:var(--blue);letter-spacing:-.07em}.plan-quarter .plan-price{color:var(--ink)}.plan-team .plan-price{color:var(--cyan)}.plan-promise{text-align:center;font-weight:850;color:var(--blue);background:#2459c914;border-radius:9px;padding:15px 8px;margin:17px 0 23px}.plan-quarter .plan-promise{color:var(--ink);background:#f5bd2b2e}.plan-team .plan-promise{color:var(--ink);background:#16a8b720}.plan-card ul{list-style:none;padding:0;margin:0;display:grid;gap:13px}.plan-card li{position:relative;padding-left:24px;font-size:14px;line-height:1.5}.plan-card li:before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:900}.pricing-purchase{display:block;min-width:310px;min-height:54px;margin:30px auto 0;border:0;border-radius:10px;background:var(--gold);color:var(--ink);font-size:18px;font-weight:900;box-shadow:0 5px 0 var(--ink)}.pricing-purchase:hover{transform:translateY(-2px)}.plan-note{max-width:760px;margin:24px auto 0;text-align:center;color:#17243d9e;font-size:12px;line-height:1.7}
.membership-section{border-top:1px solid #17243d16}.membership-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.membership-grid article{padding:26px 26px 30px;border:1px solid #17243d2b;border-radius:17px;min-height:215px}.member-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:14px;background:#2459c91b;color:var(--blue);font-size:26px;font-weight:900}.membership-grid article:nth-child(2) .member-icon{font-size:19px;color:var(--ink);background:#f5bd2b42}.membership-grid article:nth-child(3) .member-icon{color:var(--cyan);background:#16a8b728}.membership-grid h3{font-size:21px;margin:18px 0 7px}.membership-grid p{font-size:14px;line-height:1.7;color:#17243db8;margin:0}.membership-note{font-size:12px;color:#17243d8c;margin:18px 0 0}
.faq-section{border-top:1px solid #17243d16}.faq-list{max-width:880px;margin:auto}.faq-list details{border-bottom:1px solid #17243d2b;padding:3px 0}.faq-list summary{cursor:pointer;list-style:none;padding:21px 35px 21px 3px;font-size:18px;font-weight:800;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:5px;top:19px;color:var(--blue);font-size:23px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{font-size:15px;line-height:1.8;color:#17243db8;max-width:720px;margin:0 0 20px}
.social-section{max-width:1256px;margin:0 auto 95px;padding:35px 48px;background:#2459c916;border-radius:22px;display:flex;align-items:center;justify-content:space-between;gap:25px}.social-section h2{font-size:clamp(28px,2.7vw,42px);margin:10px 0}.social-section p:last-child{color:#17243db8}.social-actions{display:flex;gap:12px;flex-wrap:wrap}.social-actions button,.social-actions a{border-radius:9px;border:1px solid var(--blue);padding:12px 17px;background:var(--white);color:var(--blue);font-size:13px;font-weight:850}.social-actions button{background:var(--blue);color:var(--white)}
.site-footer{background:var(--ink);color:var(--white);padding:44px clamp(24px,5vw,80px);display:flex;align-items:center;justify-content:space-between;gap:25px}.site-footer .brand-copy strong,.site-footer .brand-copy small{color:var(--white)}.site-footer p{font-size:12px;color:#ffffffae;margin:12px 0 0}.site-footer nav{display:flex;gap:17px;flex-wrap:wrap}.site-footer nav a,.footer-site{font-size:13px;font-weight:750;color:var(--white)}.site-footer nav a:hover,.footer-site:hover{color:var(--gold)}
.home-page .site-footer{display:block;padding:0}.home-page .footer-main{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:44px clamp(24px,5vw,80px)}.home-page .footer-legal{background:#f8f9fb;color:#8d98a9;text-align:center;padding:30px 24px calc(32px + env(safe-area-inset-bottom,0px));font-size:13px;line-height:1.8}.home-page .footer-records{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;column-gap:14px;row-gap:2px}.home-page .footer-legal a{color:inherit;text-decoration:none}.home-page .footer-legal a:hover{text-decoration:underline;color:#52637d}.home-page .footer-separator{color:#cbd2dc}.home-page .footer-legal p{margin:8px 0 0;color:inherit;font-size:13px}
.account-dialog button{border:0;border-radius:9px;padding:9px 12px;background:transparent;color:var(--blue);font:inherit;cursor:pointer}.account-dialog .primary{min-height:44px;background:var(--blue);color:var(--white);font-weight:850}
@media(max-width:1100px){.hero{gap:3vw}.hero h1{font-size:clamp(43px,4.5vw,60px)}.main-nav{gap:12px}.main-nav a{font-size:12px}.plan-card{padding:50px 20px 25px}.plan-head h3{font-size:21px}.plan-price{font-size:42px}}
@media(max-width:850px){.site-header{height:auto;min-height:70px;flex-wrap:wrap;padding:12px 18px}.site-header .brand{min-width:0}.main-nav{order:3;width:100%;overflow:auto;padding:6px 0 2px;scrollbar-width:none}.header-actions{min-width:0}.section{padding:75px 25px}.hero{grid-template-columns:1fr;gap:65px;padding:70px 25px 105px}.hero-visual{max-width:680px;width:100%;margin:20px auto 0}.hero-microduck{right:-10px}.benefit-section,.concept-layout,.coach-section,.vision-section{grid-template-columns:1fr}.benefit-visual{max-width:680px;width:100%;margin:auto}.concept-layout{gap:35px}.coach-visual{max-width:680px}.vision-mark{max-width:600px;width:100%}.pricing-grid{gap:11px}.language-grid{gap:10px}.site-footer{flex-wrap:wrap}}
@media(max-width:700px){.language-grid,.pricing-grid,.membership-grid{grid-template-columns:1fr}.language-card,.plan-card,.membership-grid article{min-height:0}.pricing-grid{max-width:430px}.audience-carousel{grid-template-columns:1fr}.audience-portrait{height:360px;width:144px}.audience-copy{padding:20px 35px 35px}.audience-copy p{min-height:0}.social-section{margin:0 20px 70px;padding:30px;flex-wrap:wrap}.site-footer{display:block}.site-footer nav{margin:25px 0}}
@media(max-width:700px){.home-page .footer-main{display:block}.home-page .footer-records{display:block}.home-page .footer-separator{display:none}.home-page .footer-records>*{display:block;margin:2px 0}}
@media(max-width:560px){.site-header .brand-copy strong{font-size:14px}.site-header .brand-copy small{font-size:10px;letter-spacing:1.25px}.header-actions [data-user] button{font-size:12px;padding:9px 10px}.hero h1{font-size:clamp(37px,9vw,50px)}.hero-microduck{width:52px;top:-35px;right:0}.hero-visual:before{inset:-15px;filter:blur(18px)}.hero-visual figcaption{font-size:10px;left:8px;bottom:-22px}.hero-spark{font-size:20px}.benefit-list p{font-size:14px}.benefit-visual{min-height:0;padding-bottom:80px}.benefit-game{width:100%}.benefit-photo{width:48%;right:0}.concept-art{height:280px}.concept-art img{height:62%}.concept-code{font-size:11px}.concept-code code{font-size:12px}.vision-mark{height:250px}.social-actions{width:100%}}
@media(max-width:560px){.hero-support{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.plan-card{transition:none}.hero-visual:before,.hero-microduck,.hero-spark{animation:none}}