:root{--ani_time:.3s;--load_time:3s;--f_ptd:"Pretendard";--f_onK:"OngleipKonkon";--f_ria:"Ria";--f_nsR:"NanumSquareRound";--gary-subtler:var(--gray_5);--gary-subtle:var(--gray_10);--new-text-deep:var(--newgray_60);--new-text-bagic:var(--newgray_50);--c_white:#fff;--c_black:#000;--gray_5:#F4F5F9;--gray_10:#E6E8EA;--gray_20:#CDD1D5;--gray_30:#B1B8BE;--gray_40:#8A949E;--gray_50:#6D7882;--gray_60:#58616A;--gray_70:#464C53;--gray_80:#33363D;--gray_90:#1E2124;--gray_95:#131416;--newgray_5:#F3F5F9;--newgray_20:#D5DBE4;--newgray_40:#7588A5;--newgray_50:#5E6E87;--newgray_60:#435776;--primary_5:#ECF2FE;--primary_10:#D8E5FD;--primary_20:#B1CEFB;--primary_30:#86AFF9;--primary_40:#4C87F6;--primary_50:#256EF4;--primary_60:#0B50D0;--primary_70:#083891;--primary_80:#052561;--primary_90:#03163A;--primary_95:#020F27;--newprimary_40:#48B5F9;--secondary_5:#EEF2F7;--secondary_10:#D6E0EB;--secondary_20:#BACBDE;--secondary_30:#90B0D5;--secondary_40:#6B96C7;--secondary_50:#346FB2;--secondary_60:#1C589C;--secondary_70:#063A74;--secondary_80:#052B57;--secondary_90:#031F3F;--secondary_95:#02162C;--violet_50:#7C1DFF;--violet_60:#6214F5;--violet_70:#4310A4;--violet_80:#271485;--violet_90:#3B1480;--color-gradient-start:#63e3ff;--color-gradient-mid:#2E6DFF;--color-gradient-end:#8e73ff;--color-gradient-highlight:var(--c_white);--gradient-primary:linear-gradient(90deg,var(--color-gradient-start) 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format("woff2"),url(/_next/static/media/NanumSquareRoundEB.c151bf40.woff) format("woff")}body{color:var(--c_white)}.intro-header{position:absolute;top:1.5rem;left:1.75rem;z-index:20}.logo a{display:block;width:3rem;height:1.75rem;background:url(/intro/logo.svg) 50%/contain no-repeat}.hero{height:100%;min-height:100vh;display:flex;justify-content:center;overflow:hidden;background:url(/intro/hero-bg.png) 50%/cover 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2.2rem;border-radius:6.25rem;color:var(--c_white);font-size:1.4rem;font-weight:700;overflow:hidden;font-family:var(--f_nsR);line-height:1.5;letter-spacing:-.01rem}.btn-start:before{content:"";position:absolute;inset:0;padding:.1875rem;border-radius:inherit;background:var(--gradient-primary);-webkit-mask:linear-gradient(var(--c_white) 0 0) content-box,linear-gradient(var(--c_white) 0 0);-webkit-mask-composite:xor;mask-composite:exclude;z-index:-1}.btn-start:focus:before,.btn-start:hover:before{background:var(--gradient-border-hover);background-size:var(--gradient-border-hover-size);background-position:var(--gradient-border-hover-position);animation:borderFlow var(--motion-border-flow-duration) var(--motion-border-flow-easing) infinite}@keyframes borderFlow{0%{background-position:0 0}50%{background-position:100% 50%}to{background-position:200% 100%}}.btn-start .btn-arrow,.btn-start .btn-text{position:relative;z-index:1}.btn-start .btn-arrow{font-size:2rem;line-height:1;font-size:0;width:1.8rem;height:1.8rem;aspect-ratio:1/1;background:url(/intro/icon-arrow-right-wh.svg) 50% no-repeat;background-size:contain}.hero-copy{position:absolute;z-index:8;text-align:left}.hero-copy p{font-size:3rem;line-height:1.2;font-weight:800;letter-spacing:.01rem;text-shadow:0 .125rem .625rem rgba(0,0,0,.05);text-align:left;font-family:var(--f_ptd);color:var(--c_white)}.hero-copy-left{left:0;top:4vh}.hero-copy-right{right:0;top:28vh}.floor-hero-bg{position:absolute;width:100%;height:100%;background-repeat:no-repeat;background-position:center 60%;background-size:contain}.floor-hero-bg.hero-bg2{z-index:1;background-image:url(/intro/hero-bg2.png);mix-blend-mode:soft-light;opacity:.7;margin-top:-3rem;filter:brightness(.5)}.floor-hero-bg.hero-bg3{z-index:2;background-image:url(/intro/hero-bg3.png);mix-blend-mode:soft-light;filter:contrast(.8) 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.hero-copy-right{animation:fadeSlideUp .82s cubic-bezier(.22,1,.36,1) forwards;animation-delay:1.32s}@keyframes revealLeftToRight{0%{clip-path:inset(0 100% 0 0);opacity:0}1%{opacity:1}to{clip-path:inset(0 0 0 0);opacity:1}}@keyframes revealCenterOut{0%{clip-path:inset(0 50% 0 50%);opacity:0}1%{opacity:1}to{clip-path:inset(0 0 0 0);opacity:1}}@keyframes fadeSlideDown{0%{opacity:0;transform:translate3d(0,-1.375rem,0)}to{opacity:1;transform:translateZ(0)}}@keyframes fadeSlideUp{0%{opacity:0;transform:translate3d(0,1.375rem,0)}to{opacity:1;transform:translateZ(0)}}.floating-banner{position:absolute;right:2.375rem;bottom:2rem;z-index:10;width:8.3rem;height:auto;display:flex;flex-direction:column;align-items:center;gap:.3rem}.floating-banner:after{content:"";display:block;width:1.25rem;height:1.25rem;aspect-ratio:1/1;background:url(/intro/icon-arrow-right-blue.svg) 50% no-repeat}.floating-banner strong{display:flex;color:var(--c_white);font-size:.8rem;font-weight:500;margin-top:.2rem;flex-direction:column;align-items:center}.floating-banner strong span{text-align:center;word-break:keep-all;line-height:1.4}.floating-banner strong .yellow{color:#fee891}.article,.section{position:relative}.article{overflow:hidden}.article-inner{z-index:1;position:relative;max-width:100rem;margin:0 auto;padding:0 3.4375rem}.article-title{display:flex;flex-direction:column;align-items:center;gap:.5rem;font-family:var(--f_onK);margin-bottom:6rem}.article-title span{font-size:2rem;font-weight:400;color:var(--new-text-deep)}.article-title strong{color:var(--secondary_90);font-size:3.375rem}.article-closing-text{font-size:2rem;color:var(--new-text-deep);text-align:center;line-height:1.6;margin-top:10rem;font-family:var(--f_onK)}.em-blue{color:var(--primary_50)}.em-purple{color:var(--violet_50);font-style:normal}.gradient-text{background:linear-gradient(97.6deg,#47c8ff 5%,#1b6bff 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.nav-search-wrap:before{position:absolute;content:"";display:block;background-position:50%;background-repeat:no-repeat;background-size:contain;left:1.2rem;bottom:0;width:5.25rem;height:4.375rem}.site-nav.reading-nav .nav-search-wrap:before{background-image:url(/intro/reading-nav-img.svg)}.site-nav.writing-nav .nav-search-wrap:before{background-image:url(/intro/writing-nav-img.svg)}.nav-q-wrap{display:flex;align-items:center;gap:.6rem}.nav-q-label{color:var(--new-text-bagic);font-size:1.249999rem;font-family:var(--f_onK);margin:.25rem .4rem 0 0}.nav-q{color:var(--newgray_40);opacity:.2;font-weight:700;font-size:1.4rem;font-family:var(--f_ria);line-height:1;transition:var(--ani_time)}.nav-q:hover{opacity:.5}.nav-q.active{color:var(--primary_50);font-weight:700;opacity:1}.writing-nav .nav-q.active{color:var(--violet_50)}.nav-btns{display:flex;align-items:center;gap:.625rem;flex-shrink:0}.nav-btn{font-size:1rem;font-weight:600;border-radius:6.25rem;padding:1.032rem 1.6rem;font-family:var(--f_nsR)}.btn-join{position:relative;color:var(--primary_50);transition:background .2s;background:var(--c_white)}.btn-join:before{content:"";position:absolute;inset:0;padding:.1875rem;border-radius:inherit;background:var(--gradient-primary);-webkit-mask:linear-gradient(var(--c_white) 0 0) content-box,linear-gradient(var(--c_white) 0 0);-webkit-mask-composite:xor;mask-composite:exclude;z-index:1}.btn-join:hover{background:#f0f8ff}.btn-login{background:var(--gradient-primary);color:var(--c_white);transition:opacity .2s}.btn-login:hover{opacity:.88}.btn-top{border-radius:50%;border:.0625rem solid var(--newgray_20);background:var(--c_white);transition:transform .2s,box-shadow .2s;display:flex;width:3.188rem;height:3.188rem;align-items:center;justify-content:center}.btn-top:hover{transform:translateY(-.125rem);box-shadow:0 .25rem .75rem rgba(0,0,0,.1)}.btn-top:before{content:"";display:block;background:url(/intro/icon-arrow-top.svg) 50%/contain no-repeat;width:1.8rem;height:1.8rem}.speech-bubbles{max-width:75rem;margin:0 auto;height:37.5rem;padding-top:2rem}.bubble,.speech-bubbles{display:flex;flex-direction:column}.bubble{margin-top:-1rem;padding:2.5rem 4.375rem 2.5rem 5.125rem;transform:translateY(2.5rem);transition:opacity .5s ease,transform .5s ease;border-radius:5rem 6.5rem .5rem 5rem;background:rgba(255,255,255,.3);box-shadow:0 .25rem 1.25rem 0 rgba(182,189,216,.5);backdrop-filter:blur(.3125rem);align-self:flex-start;min-width:30rem;gap:.3rem}.bubble.visible{opacity:1;transform:translateY(0)}.bubble--right{border-radius:6.5rem 5rem 5rem .5rem;align-self:flex-end}.bubble strong{font-size:1.3rem;font-weight:600;color:var(--secondary_70)}.bubble span{font-size:1.05rem;color:var(--gray_70);font-family:var(--f_nsR)}.reading-problem{background:linear-gradient(180deg,#e8edfa,#eef2fa);padding:22rem 0 10rem}.reading-problem .speech-bubbles .bubble:first-child{margin-right:11rem}.reading-problem .speech-bubbles .bubble:nth-child(3){margin-right:3rem}.reading-problem .speech-bubbles .bubble:nth-child(4){margin-left:5rem}.reading-problem .speech-bubbles .bubble:nth-child(5){margin-right:10rem}.writing-problem{padding:24rem 0 10rem;background:linear-gradient(180deg,var(--c_white) 0,#eef2ff 10.58%,#f3f6ff 100%)}.speech-bubbles--purple .bubble strong{color:var(--violet_80)}.writing-problem .speech-bubbles .bubble:first-child{margin-right:9rem}.writing-problem .speech-bubbles .bubble:nth-child(2){margin-left:5rem}.writing-problem .speech-bubbles .bubble:nth-child(3){margin-right:4rem}.writing-problem .speech-bubbles .bubble:nth-child(4){margin-left:8rem}.writing-problem .speech-bubbles .bubble:nth-child(5){margin-right:11rem}.solution-intro-label{display:flex;flex-direction:column;align-items:center;margin-bottom:calc(13rem - .5rem);text-align:center;gap:1.5625rem}.solution-intro-label>div:first-child{display:flex;align-items:center;gap:.25rem;font-family:var(--f_onK);font-size:3.8rem;line-height:1.2}.solution-badge{display:inline-flex;align-items:center;justify-content:center;background:var(--primary_50);color:#f3f5f9;-webkit-mask:url(/intro/solution-badge-bg.svg) 50% no-repeat;mask:url(/intro/solution-badge-bg.svg) 50% no-repeat;-webkit-mask-size:contain;mask-size:contain;width:5.5625rem;height:6.6875rem}.solution-intro-desc{font-size:1.8rem;color:var(--primary_90);font-family:var(--f_nsR);line-height:1.5;font-weight:800}.feature-section{position:relative;padding-top:10rem}.feature-section:after{position:absolute;top:0;left:50%;transform:translateX(-50%);content:"";display:block;width:100%;height:100%;max-width:89rem;max-height:69.68rem;border:2.25rem solid 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1.25rem;display:flex;align-items:center;justify-content:center;border-radius:62.4375rem;background:rgba(255,255,255,.4);backdrop-filter:blur(.125rem);-webkit-backdrop-filter:blur(.125rem);box-shadow:0 .125rem .625rem rgba(58,70,118,.18),inset 0 0 0 .0625rem rgba(255,255,255,.08);color:var(--new-text-deep);text-align:center;font-size:1.12rem;font-family:var(--f_onK)}.feat-card__bubble:after{z-index:-1;content:"";position:absolute;left:50%;bottom:-.875rem;width:2rem;height:2rem;background:rgba(255,255,255,1);transform:translateX(-50%) rotate(45deg);border-radius:0 0 .25rem 0;box-shadow:.3125rem .3125rem .5rem rgba(58,70,118,.1)}.feat-card__name{font-size:1.4rem;font-weight:800;color:var(--primary_50);letter-spacing:-.02rem;font-family:var(--f_nsR);margin-top:1rem}.feat-card__desc{font-size:1.1rem;color:var(--secondary_90);line-height:1.4}.feat-ico{display:block;width:5rem;height:5rem;background-size:contain;background-repeat:no-repeat;background-position:50%;flex-shrink:0}.feat-ico.ico1{background-image:url(/intro/feat-ico1.svg)}.feat-ico.ico2{background-image:url(/intro/feat-ico2.svg)}.feat-ico.ico3{background-image:url(/intro/feat-ico3.svg)}.feat-ico.ico4{background-image:url(/intro/feat-ico4.svg)}.feat-ico.ico5{background-image:url(/intro/feat-ico5.svg)}.feat-ico.ico6{background-image:url(/intro/feat-ico6.svg)}.feature-obj{z-index:1;position:absolute;display:block;background-position:50%;background-repeat:no-repeat;background-size:contain}.feature-obj.obj1{width:18.6875rem;height:13.1875rem;background-image:url(/intro/feature-obj1.svg)}.feature-obj.obj2{width:19.625rem;height:17.125rem;background-image:url(/intro/feature-obj2.svg)}.reading-solution{background:linear-gradient(180deg,#eef2fa,#f9fafd 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