:root{--navy:#0b2938;--navy2:#123b4e;--ink:#13252d;--muted:#627179;--cream:#f4f1e8;--paper:#fffdf8;--white:#fff;--line:#d8ddd9;--mint:#c9e6dc;--accent:#f06a43;--accent2:#ff8a5f;--shadow:0 24px 70px rgba(7,35,47,.12)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden}
body{font-family:'Pretendard',system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-x:hidden}
a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}img{display:block;max-width:100%}
.eyebrow{font-size:11px;line-height:1.4;letter-spacing:.2em;font-weight:800;color:var(--accent)}
.section{scroll-margin-top:76px}.section-inner{width:min(1160px,calc(100% - 48px));margin:0 auto;padding:clamp(88px,9vw,144px) 0}
.section-head h2,.section-title h2,.system-intro h2{font-size:clamp(32px,4vw,54px);line-height:1.18;letter-spacing:-.045em;margin-top:17px}

/* header */
.site-header{height:76px;background:rgba(11,41,56,.96);color:#fff;position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,.11);backdrop-filter:blur(14px)}
.header-inner{height:100%;width:min(1240px,calc(100% - 48px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;flex:none}.brand-symbol{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--accent);font-family:'DM Serif Display',serif;font-size:25px;font-style:italic;color:#fff}.brand-copy{display:flex;flex-direction:column;line-height:1.15}.brand-copy b{font-size:16px;letter-spacing:-.03em}.brand-copy small{font-size:10px;letter-spacing:.24em;margin-top:4px;color:rgba(255,255,255,.62)}
.nav{display:flex;align-items:center;justify-content:center;gap:clamp(18px,2.4vw,34px);margin-left:auto}.nav a{font-size:13px;font-weight:600;color:rgba(255,255,255,.72);transition:color .2s}.nav a:hover{color:#fff}
.header-cta{display:inline-flex;align-items:center;justify-content:center;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:10px 18px;font-size:13px;font-weight:700;transition:.2s}.header-cta:hover{background:#fff;color:var(--navy)}

/* hero */
.hero{position:relative;isolation:isolate;background:var(--navy);color:#fff;min-height:760px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(255,255,255,.038) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.038) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(to right,transparent 5%,#000 45%,#000 100%);z-index:-1}
.hero-bg span{position:absolute;border:1px solid rgba(201,230,220,.18);border-radius:50%;z-index:-1}.hero-bg span:nth-child(1){width:620px;height:620px;right:-130px;top:-210px}.hero-bg span:nth-child(2){width:420px;height:420px;right:70px;top:32px}.hero-bg span:nth-child(3){width:240px;height:240px;right:240px;top:145px;background:rgba(201,230,220,.04)}
.hero-inner{width:min(1160px,calc(100% - 48px));min-height:590px;margin:0 auto;display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:clamp(44px,7vw,100px);padding:64px 0 48px}
.hero-copy .eyebrow{color:var(--mint)}.hero h1{font-size:clamp(48px,6vw,82px);line-height:1.07;letter-spacing:-.055em;margin:25px 0 28px}.hero h1 em{font-family:inherit;font-weight:inherit;color:var(--accent2);font-style:normal;letter-spacing:inherit}.hero-lead{white-space:pre-line;max-width:590px;color:rgba(255,255,255,.7);font-size:clamp(15px,1.5vw,18px);line-height:1.8}
.hero-actions{display:flex;align-items:center;gap:27px;margin-top:38px}.btn{display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800}.btn.primary{background:var(--accent);color:#fff;padding:16px 24px;border-radius:4px;box-shadow:0 12px 32px rgba(240,106,67,.26);transition:.2s}.btn.primary:hover{background:var(--accent2);transform:translateY(-2px)}.btn.text{color:rgba(255,255,255,.84);gap:13px}.btn.text span{font-size:18px;transition:transform .2s}.btn.text:hover span{transform:translateX(4px)}
.hero-visual{position:relative;display:grid;place-items:center;min-height:470px}.hero-card{position:relative;width:min(390px,90%);aspect-ratio:.79;background:var(--cream);color:var(--navy);padding:34px;border-radius:2px;transform:rotate(3deg);box-shadow:0 42px 100px rgba(0,0,0,.32);overflow:hidden}.hero-card::after{content:"";position:absolute;inset:0;background:linear-gradient(rgba(11,41,56,.075) 1px,transparent 1px),linear-gradient(90deg,rgba(11,41,56,.075) 1px,transparent 1px);background-size:28px 28px;mask-image:linear-gradient(transparent 5%,#000 35%,#000);z-index:-1}.card-top{display:flex;justify-content:space-between;font-size:10px;font-weight:900;letter-spacing:.19em}.formula{font-size:clamp(34px,4vw,52px);font-weight:800;line-height:1.18;letter-spacing:-.06em;margin-top:72px}.formula i{font-family:'DM Serif Display',serif;color:var(--accent);font-weight:400}.formula b{color:var(--accent)}.hero-card>p{font-size:13px;font-weight:600;line-height:1.65;position:absolute;left:34px;bottom:30px}.graph{height:90px;position:relative;margin:27px 0 0;border-left:2px solid var(--navy);border-bottom:2px solid var(--navy);display:flex;align-items:flex-end;justify-content:space-around;padding:0 11px}.graph span{display:block;width:18px;background:var(--mint)}.graph span:nth-child(1){height:18%}.graph span:nth-child(2){height:29%}.graph span:nth-child(3){height:44%}.graph span:nth-child(4){height:62%}.graph span:nth-child(5){height:87%;background:var(--accent)}.graph i{position:absolute;left:3%;right:2%;bottom:10%;height:2px;background:var(--accent);transform:rotate(-18deg);transform-origin:left center}.math-orbit{position:absolute;z-index:2;display:grid;place-items:center;border-radius:50%;font-family:'DM Serif Display',serif;color:var(--navy);box-shadow:0 16px 36px rgba(0,0,0,.2)}.orbit-a{width:76px;height:76px;background:var(--accent);color:#fff;font-size:31px;right:0;top:30px;transform:rotate(-8deg)}.orbit-b{width:58px;height:58px;background:var(--mint);font-size:27px;left:4px;bottom:76px}.orbit-c{width:42px;height:42px;background:#fff;font-size:21px;right:25px;bottom:25px}
.hero-facts{width:min(1160px,calc(100% - 48px));margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid rgba(255,255,255,.15)}.hero-facts div{padding:27px 28px;display:flex;align-items:center;gap:20px;border-right:1px solid rgba(255,255,255,.15)}.hero-facts div:first-child{padding-left:0}.hero-facts div:last-child{border:0}.hero-facts span{flex:none;min-width:38px;font-size:13px;color:var(--mint);letter-spacing:.1em;font-weight:800}.hero-facts b{font-size:17px;line-height:1.4;letter-spacing:-.025em;font-weight:750}

/* philosophy */
.about{background:var(--paper)}.about-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(54px,8vw,120px)}.about-content{padding-top:4px}.about-lead{white-space:pre-line;font-size:clamp(22px,2.3vw,30px);line-height:1.55;font-weight:700;letter-spacing:-.035em;color:var(--navy);margin-bottom:25px}.about-content>p:not(.about-lead){color:var(--muted);font-size:16px;line-height:1.85;max-width:670px}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:48px}.principles article{border-top:2px solid var(--navy);padding:20px 4px}.principles span{display:block;color:var(--accent);font:italic 20px 'DM Serif Display',serif;margin-bottom:24px}.principles b{display:block;font-size:18px}.principles p{font-size:13px;color:var(--muted);line-height:1.6;margin-top:6px}

/* curriculum */
.curriculum{background:var(--cream)}.section-title{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:52px}.section-title>p{max-width:440px;color:var(--muted);font-size:15px;line-height:1.75}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.course-card{position:relative;background:var(--paper);border:1px solid rgba(11,41,56,.12);padding:34px 30px 30px;min-height:366px;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}.course-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}.course-card.featured{background:var(--navy);color:#fff}.course-no{font:italic 26px 'DM Serif Display',serif;color:var(--accent)}.course-en{font-size:10px;letter-spacing:.17em;font-weight:900;color:var(--muted);margin-top:35px}.featured .course-en{color:var(--mint)}.course-card h3{font-size:26px;letter-spacing:-.04em;margin:8px 0 14px}.course-card>p:not(.course-en){font-size:14px;line-height:1.75;color:var(--muted)}.featured>p:not(.course-en){color:rgba(255,255,255,.67)}.course-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto;padding-top:28px}.course-tags span{font-size:11px;font-weight:700;border:1px solid var(--line);padding:6px 9px;border-radius:99px}.featured .course-tags span{border-color:rgba(255,255,255,.22);color:rgba(255,255,255,.8)}.course-label{position:absolute;top:0;right:25px;background:var(--accent);color:#fff;padding:7px 11px;font-size:9px;font-weight:900;letter-spacing:.15em}
.support-programs{margin-top:160px}.support-title{font-size:clamp(29px,3.3vw,44px);line-height:1.18;letter-spacing:-.045em;font-weight:700;margin-bottom:32px}.support-list{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid rgba(11,41,56,.18)}.support-list article{display:grid;grid-template-columns:32px 1fr;gap:12px;padding:23px 22px 23px 0;border-bottom:1px solid rgba(11,41,56,.18)}.support-list article:nth-child(odd){border-right:1px solid rgba(11,41,56,.18)}.support-list article:nth-child(even){padding-left:25px}.support-list article>span{font:24px 'DM Serif Display',serif;color:var(--accent)}.support-list b{font-size:18px;line-height:1.4}.support-list p{font-size:14.5px;color:var(--muted);margin-top:4px;line-height:1.6}

/* system */
.system{background:var(--navy);color:#fff}.system-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:clamp(60px,8vw,118px)}.system-intro{position:sticky;top:118px;align-self:start}.system-intro .eyebrow{color:var(--mint)}.system-intro>p:not(.eyebrow){color:rgba(255,255,255,.62);font-size:15px;line-height:1.8;margin-top:26px;max-width:430px}.system-intro>a{display:inline-flex;gap:14px;align-items:center;margin-top:38px;color:var(--mint);font-size:13px;font-weight:800}.system-intro>a span{font-size:18px}.steps{list-style:none;border-top:1px solid rgba(255,255,255,.17)}.steps li{display:block;padding:31px 0;border-bottom:1px solid rgba(255,255,255,.17)}.steps li>span{font:italic 25px 'DM Serif Display',serif;color:var(--accent2)}.steps small{font-size:9px;letter-spacing:.18em;color:var(--mint);font-weight:900}.steps h3{font-size:22px;margin:4px 0 9px}.steps p{font-size:14px;color:rgba(255,255,255,.6);line-height:1.7}

/* faq */
.faq{background:var(--paper)}.faq-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:clamp(60px,8vw,120px)}.faq .section-head>p:last-child{color:var(--muted);font-size:14px;margin-top:24px}.faq-list{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line)}.faq summary{list-style:none;cursor:pointer;position:relative;padding:24px 44px 24px 0;font-size:20px;line-height:1.5;font-weight:700}.faq summary::-webkit-details-marker{display:none}.faq summary span{display:inline-block;width:46px;font:italic 15px 'DM Serif Display',serif;color:var(--accent)}.faq summary::after{content:"+";position:absolute;right:6px;font:26px 'DM Serif Display',serif;color:var(--accent);top:18px}.faq details[open] summary::after{content:"−"}.faq .ans{padding:0 44px 25px 0;font-size:14px;color:var(--muted);line-height:1.8}

/* consultation */
.sf-ct{background:var(--mint);color:var(--ink);padding:clamp(84px,9vw,134px) 24px}.sf-ct-inner{width:min(1080px,100%);margin:auto;display:grid;grid-template-columns:.86fr 1.14fr;gap:clamp(50px,8vw,110px);align-items:start}.sf-ct-eyebrow{font-size:11px;letter-spacing:.2em;color:var(--navy);font-weight:900}.sf-ct-info h2{font-size:clamp(34px,4vw,52px);line-height:1.2;letter-spacing:-.045em;margin:18px 0 20px}.sf-ct-lead{font-size:15px;color:#49646a;line-height:1.75;max-width:390px}.sf-ct-meta{list-style:none;margin-top:34px;display:flex;flex-direction:column;gap:10px}.sf-ct-meta li{display:flex;gap:18px;font-size:14px}.sf-ct-meta .k{width:65px;color:#5b777b;font-size:12px;font-weight:800}.sf-ct-form{background:var(--paper);padding:clamp(26px,3.5vw,42px);box-shadow:var(--shadow);border-radius:4px}.sf-ct-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.sf-ct-field{margin-bottom:16px}.sf-ct-field label{display:block;font-size:12px;font-weight:800;margin-bottom:7px}.sf-ct-field .req{color:var(--accent);margin-left:3px}.sf-ct-field input,.sf-ct-field textarea{display:block;width:100%;border:1px solid var(--line);background:#fff;padding:13px 14px;border-radius:2px;color:var(--ink);font-size:14px;outline:none;transition:.2s}.sf-ct-field textarea{min-height:112px;resize:vertical}.sf-ct-field input:focus,.sf-ct-field textarea:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(11,41,56,.08)}.sf-ct-agree{display:flex;align-items:flex-start;gap:8px;color:var(--muted);font-size:12px;line-height:1.55;margin:2px 0 17px}.sf-ct-agree input{width:16px;height:16px;margin-top:1px;accent-color:var(--navy)}.sf-ct-submit{border:0;width:100%;background:var(--navy);color:#fff;padding:16px;cursor:pointer;font-size:15px;font-weight:800;border-radius:2px;transition:.2s}.sf-ct-submit:hover{background:var(--accent)}.sf-ct-submit[disabled]{opacity:.55}.sf-ct-msg{display:none;margin-top:12px;text-align:center;font-size:13px}.sf-ct-msg.show{display:block}.sf-ct-msg.ok{color:#176a50;font-weight:700}.sf-ct-msg.err{color:#b33b25}

/* contact/footer */
.contact{background:var(--cream)}.contact-phone{font:italic clamp(25px,3vw,38px) 'DM Serif Display',serif;color:var(--navy);border-bottom:2px solid var(--accent)}.contact-grid{display:grid;grid-template-columns:.78fr 1.22fr;background:var(--paper);box-shadow:var(--shadow)}.contact-info{padding:clamp(28px,4vw,50px)}.contact-info dl{display:grid;grid-template-columns:78px 1fr;gap:19px 18px}.contact-info dt{font-size:11px;color:var(--muted);font-weight:800}.contact-info dd{font-size:14px;line-height:1.65}.contact-actions{display:flex;gap:9px;margin-top:34px}.contact-actions a,.sf-map-links a{border:1px solid var(--navy);padding:10px 15px;font-size:12px;font-weight:800;transition:.2s}.contact-actions a:hover,.sf-map-links a:hover{background:var(--navy);color:#fff}.map-wrap{min-height:390px}.sf-map{height:100%}.sf-map-embed{height:100%;min-height:340px;background:#e5e9e6}.sf-map-embed iframe,.sf-map-embed>div{width:100%!important;height:100%!important;border:0}.sf-map-links{display:none}
.footer{background:#071e29;color:rgba(255,255,255,.55);padding:42px 24px}.footer-inner{width:min(1160px,100%);margin:auto;display:flex;justify-content:space-between;align-items:center;gap:30px}.footer-brand .brand-copy b{color:#fff}.footer-inner>div{text-align:right;font-size:12px;line-height:1.8}.footer-inner>div p:first-child{color:rgba(255,255,255,.76)}

/* fixed quick buttons */
.sf-iq-rail{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:45;display:flex;flex-direction:column;gap:8px}.sf-iq-r{width:52px;height:52px;border:0;border-radius:50%;background:#fff;color:var(--navy);box-shadow:0 7px 24px rgba(5,29,39,.2);display:grid;place-items:center;font-size:11px;font-weight:900;cursor:pointer;transition:.2s}.sf-iq-r:hover{transform:translateY(-2px);background:var(--cream)}.sf-iq-r-on{background:var(--accent);color:#fff}.sf-iq-r-on:hover{background:var(--accent2)}.sf-iq-r[data-sf-top]{opacity:1;pointer-events:auto;transform:none}.sf-iq-r[data-sf-top].sf-show{opacity:1;pointer-events:auto;transform:none}

/* motion */
@media(prefers-reduced-motion:no-preference){.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .75s cubic-bezier(.2,.7,.2,1),transform .75s cubic-bezier(.2,.7,.2,1)}[data-reveal].in{opacity:1;transform:none}.js .stagger>*{opacity:0;transform:translateY(18px);transition:opacity .65s,transform .65s}.stagger.in>*{opacity:1;transform:none}.stagger.in>*:nth-child(2){transition-delay:.08s}.stagger.in>*:nth-child(3){transition-delay:.16s}.stagger.in>*:nth-child(4){transition-delay:.24s}}

@media(max-width:980px){.nav{display:none}.hero-inner{grid-template-columns:1fr .8fr;gap:30px}.hero h1{font-size:clamp(46px,7vw,68px)}.math-orbit{display:none}.about-grid,.system-grid,.faq-grid{grid-template-columns:1fr;gap:50px}.system-intro{position:static}.course-card{padding:28px 22px}.contact-grid{grid-template-columns:1fr}.map-wrap{min-height:340px}}
@media(max-width:760px){.section-inner,.hero-inner,.hero-facts,.header-inner{width:min(100% - 36px,1160px)}.site-header{height:68px}.brand-symbol{width:34px;height:34px;font-size:22px}.brand-copy b{font-size:14px}.header-cta{padding:9px 14px}.hero{min-height:0}.hero-inner{grid-template-columns:1fr;padding:76px 0 48px}.hero-visual{min-height:350px}.hero-card{width:260px;padding:25px}.hero-card>p{left:25px;bottom:22px;font-size:11px}.formula{margin-top:45px;font-size:34px}.graph{height:70px}.hero-facts{grid-template-columns:1fr}.hero-facts div,.hero-facts div:first-child{padding:17px 0;border-right:0;border-bottom:1px solid rgba(255,255,255,.15)}.hero-facts div:last-child{border-bottom:0}.principles,.course-grid{grid-template-columns:1fr}.principles article{display:grid;grid-template-columns:45px 90px 1fr;align-items:start;gap:8px}.principles span{margin:0}.principles p{margin:0}.course-card{min-height:320px}.support-list{grid-template-columns:1fr}.support-list article:nth-child(odd){border-right:0}.support-list article:nth-child(even){padding-left:0}.section-title{align-items:flex-start;flex-direction:column;margin-bottom:38px}.section-title>p{max-width:520px}.sf-ct-inner{grid-template-columns:1fr;gap:42px}.sf-ct-row{grid-template-columns:1fr}.footer-inner{align-items:flex-start;flex-direction:column}.footer-inner>div{text-align:left}.sf-iq-rail{right:11px;top:auto;bottom:12px;transform:none;flex-direction:row}.sf-iq-r{width:46px;height:46px}.contact-phone{font-size:26px}}
@media(max-width:420px){.hero h1{font-size:43px}.hero-actions{align-items:flex-start;flex-direction:column;gap:20px}.hero-visual{min-height:330px}.section-inner{width:calc(100% - 32px)}.section-head h2,.section-title h2,.system-intro h2{font-size:34px}.principles article{grid-template-columns:36px 78px 1fr}.faq summary{font-size:18px}.faq summary span{width:38px}.faq .ans{padding-left:0}.contact-info dl{grid-template-columns:65px 1fr}}

.gallery-section{background:var(--paper);border-top:1px solid var(--line)}.gallery-title{margin-bottom:0}.gallery-placeholder{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:44px}.gallery-placeholder>div{aspect-ratio:4/3;background:#eef0ec;border:1px solid var(--line)}@media(max-width:760px){.gallery-placeholder{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:30px}}

/* Education philosophy redesign */
.about-grid{grid-template-columns:.88fr 1.12fr;gap:clamp(36px,6vw,82px);align-items:stretch}
.about .section-head{position:relative;isolation:isolate;overflow:hidden;min-height:100%;padding:clamp(34px,4vw,52px);background:var(--navy);color:#fff;display:flex;flex-direction:column;justify-content:flex-start;border-radius:4px}
.about .section-head::before{content:"";position:absolute;width:310px;height:310px;border:1px solid rgba(201,230,220,.18);border-radius:50%;right:-145px;bottom:-125px;box-shadow:0 0 0 58px rgba(201,230,220,.045),0 0 0 116px rgba(201,230,220,.025);z-index:-1}
.about .section-head::after{content:"∴";position:absolute;right:36px;bottom:24px;color:var(--accent2);font:italic 54px 'DM Serif Display',serif;line-height:1}
.about .section-head .eyebrow{color:var(--mint)}
.about .section-head h2{font-size:clamp(34px,3.6vw,49px);line-height:1.25;letter-spacing:-.05em;margin-top:28px}
.about .section-head h2 strong{color:var(--accent2);font-weight:800}
.about-content{padding:clamp(18px,2.2vw,30px) 0 4px}
.about-lead{font-size:clamp(23px,2.15vw,29px);line-height:1.58;margin-bottom:28px;padding-left:22px;border-left:4px solid var(--accent)}
.about-content>p:not(.about-lead){max-width:none;line-height:1.9}
.principles{gap:12px;margin-top:38px}
.principles article{min-height:164px;padding:22px 18px;background:var(--cream);border-top:3px solid var(--navy);display:flex;flex-direction:column}
.principles span{margin-bottom:19px}
.principles p{margin-top:auto;padding-top:8px}
@media(max-width:980px){.about .section-head{min-height:390px}.about-content{padding-top:0}}
@media(max-width:760px){.about-grid{gap:38px}.about .section-head{min-height:340px;padding:32px 26px}.about .section-head::after{right:26px}.principles article{display:flex;min-height:145px}.principles span{margin-bottom:16px}.principles p{margin-top:auto}}

@media(max-width:760px){.support-programs{margin-top:100px}}

.gallery-placeholder>.gallery-cell{background-size:cover;background-position:center;background-repeat:no-repeat;transition:transform .25s,box-shadow .25s}.gallery-placeholder>.gallery-cell:hover{transform:translateY(-3px);box-shadow:var(--shadow)}