:root{--color-primary: #1DB8A8;--color-primary-dark: #189E90;--color-primary-light: #3DD4AB;--color-secondary: #15A8C9;--color-accent: #5CD4CB;--color-bg-start: #E8F6F3;--color-bg-mid: #F0F4F8;--color-bg-end: #E6F2EF;--color-text: #1A2332;--color-text-secondary: #5A6A7A;--color-text-light: #8896A6;--glass-bg: rgba(255, 255, 255, .55);--glass-border: rgba(255, 255, 255, .6);--glass-shadow: rgba(29, 184, 168, .08);--glass-blur: 16px;--radius-sm: 12px;--radius-md: 20px;--radius-lg: 28px;--radius-xl: 36px;--font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-family);color:var(--color-text);background:linear-gradient(160deg,var(--color-bg-start) 0%,var(--color-bg-mid) 40%,var(--color-bg-end) 100%);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700}.glass{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);border-radius:var(--radius-md);box-shadow:0 8px 32px var(--glass-shadow)}.glass-accent{background:linear-gradient(135deg,#1db8a814,#15a8c90f);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid rgba(29,184,168,.2);border-radius:var(--radius-md);box-shadow:0 8px 32px var(--glass-shadow)}.container{max-width:1200px;margin:0 auto;padding:0 24px}.section{padding:100px 0}@media(max-width:768px){.section{padding:64px 0}.container{padding:0 16px}}.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;transition:background .3s,box-shadow .3s}.nav.scrolled{background:#ffffffbf;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 2px 20px #0000000f}.nav-inner{display:flex;align-items:center;justify-content:space-between}.nav-logo{font-size:1.5rem;font-weight:800;color:var(--color-primary);display:flex;align-items:center;gap:8px}.nav-logo-img{width:32px;height:32px;object-fit:contain}.nav-logo span{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;border:none;border-radius:100px;font-size:.9rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;font-family:var(--font-family)}.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 16px #1db8a84d}.hero{min-height:100vh;display:flex;align-items:center;padding-top:80px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-200px;right:-200px;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(29,184,168,.12) 0%,transparent 70%);pointer-events:none}.hero:after{content:"";position:absolute;bottom:-100px;left:-100px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(21,168,201,.08) 0%,transparent 70%);pointer-events:none}.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:100px;font-size:.85rem;font-weight:600;color:var(--color-primary);margin-bottom:20px}.hero-title{font-size:3.2rem;font-weight:900;line-height:1.2;margin-bottom:20px;letter-spacing:-.02em}.hero-title .highlight{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-desc{font-size:1.15rem;color:var(--color-text-secondary);margin-bottom:36px;max-width:480px;line-height:1.7}.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}.btn-primary{display:inline-flex;align-items:center;gap:10px;padding:16px 32px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;border:none;border-radius:16px;font-size:1.05rem;font-weight:700;cursor:pointer;transition:transform .2s,box-shadow .2s;font-family:var(--font-family)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px #1db8a859}.btn-primary svg{width:22px;height:22px}.btn-secondary{display:inline-flex;align-items:center;gap:10px;padding:16px 32px;background:var(--glass-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--color-text);border:1px solid var(--glass-border);border-radius:16px;font-size:1.05rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;font-family:var(--font-family)}.btn-secondary:hover{transform:translateY(-2px);box-shadow:0 4px 16px #00000014}.hero-mockup{position:relative;display:flex;justify-content:center}.phone-frame{width:280px;height:580px;border-radius:36px;overflow:hidden;box-shadow:0 20px 60px #00000026,0 0 0 1px #0000000d;position:relative;background:#fff}.phone-frame img{width:100%;height:100%;object-fit:cover}.phone-placeholder{width:100%;height:100%;background:linear-gradient(160deg,var(--color-bg-start),var(--color-primary-light));display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--color-primary);font-weight:600;font-size:.9rem}.phone-placeholder svg{width:48px;height:48px;opacity:.5}.stats-bar{padding:48px 0}.stats-inner{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.stat-item{text-align:center;padding:28px 20px}.stat-number{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{font-size:.95rem;color:var(--color-text-secondary);margin-top:4px;font-weight:500}.features-header{text-align:center;max-width:640px;margin:0 auto 60px}.section-label{display:inline-block;font-size:.85rem;font-weight:700;color:var(--color-primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.section-title{font-size:2.4rem;margin-bottom:16px;letter-spacing:-.01em}.section-desc{font-size:1.05rem;color:var(--color-text-secondary);line-height:1.7}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{padding:32px;transition:transform .25s,box-shadow .25s}.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px #1db8a81f}.feature-icon{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.6rem}.feature-icon.teal{background:#1db8a81f;color:var(--color-primary)}.feature-icon.blue{background:#15a8c91f;color:var(--color-secondary)}.feature-icon.green{background:#3dd4ab1f;color:#2db88a}.feature-icon.orange{background:#f7b7311f;color:#e8a620}.feature-icon.purple{background:#8b5cf61f;color:#8b5cf6}.feature-icon.rose{background:#f43f5e1f;color:#e11d48}.feature-title{font-size:1.2rem;font-weight:700;margin-bottom:10px}.feature-desc{font-size:.95rem;color:var(--color-text-secondary);line-height:1.65}.showcase{padding:80px 0}.showcase-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;margin-bottom:100px}.showcase-row:last-child{margin-bottom:0}.showcase-row.reverse .showcase-visual{order:-1}.showcase-label{font-size:.8rem;font-weight:700;color:var(--color-primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}.showcase-title{font-size:2rem;margin-bottom:16px;letter-spacing:-.01em}.showcase-desc{font-size:1rem;color:var(--color-text-secondary);line-height:1.7;margin-bottom:24px}.showcase-list{list-style:none;display:flex;flex-direction:column;gap:12px}.showcase-list li{display:flex;align-items:flex-start;gap:10px;font-size:.95rem;color:var(--color-text-secondary)}.showcase-list li .check{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:#1db8a81f;color:var(--color-primary);display:flex;align-items:center;justify-content:center;font-size:.75rem;margin-top:2px}.showcase-visual{display:flex;justify-content:center}.showcase-phone{width:260px;height:540px;border-radius:32px;overflow:hidden;box-shadow:0 16px 48px #0000001f;background:#fff}.showcase-phone.landscape{width:480px;height:270px;border-radius:24px}.showcase-phone img{width:100%;height:100%;object-fit:cover}.ai-section{background:linear-gradient(160deg,#1db8a80a,#15a8c90a)}.ai-demo{padding:32px;max-width:560px}.ai-score-bar{display:flex;align-items:center;gap:12px;margin-bottom:14px}.ai-score-label{width:80px;font-size:.85rem;font-weight:600;color:var(--color-text-secondary)}.ai-bar-track{flex:1;height:8px;background:#0000000f;border-radius:4px;overflow:hidden}.ai-bar-fill{height:100%;border-radius:4px;transition:width .8s ease}.ai-bar-fill.fluency{background:#4ecdc4}.ai-bar-fill.grammar{background:#ff6b6b}.ai-bar-fill.pronunciation{background:#f7b731}.ai-bar-value{font-size:.85rem;font-weight:700;width:32px;text-align:right}.ai-feedback-text{margin-top:20px;padding:16px;border-radius:var(--radius-sm);background:#1db8a80f;border-left:3px solid var(--color-primary);font-size:.9rem;color:var(--color-text-secondary);line-height:1.65}.cta{padding:100px 0;text-align:center}.cta-card{padding:64px 40px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-xl);color:#fff;position:relative;overflow:hidden}.cta-card:before{content:"";position:absolute;top:-80px;right:-80px;width:300px;height:300px;border-radius:50%;background:#ffffff14;pointer-events:none}.cta-card:after{content:"";position:absolute;bottom:-60px;left:-60px;width:200px;height:200px;border-radius:50%;background:#ffffff0f;pointer-events:none}.cta-title{font-size:2.2rem;font-weight:800;margin-bottom:16px;position:relative}.cta-desc{font-size:1.1rem;opacity:.9;margin-bottom:36px;max-width:480px;margin-inline:auto;position:relative}.btn-white{display:inline-flex;align-items:center;gap:10px;padding:16px 36px;background:#fff;color:var(--color-primary);border:none;border-radius:16px;font-size:1.05rem;font-weight:700;cursor:pointer;transition:transform .2s,box-shadow .2s;font-family:var(--font-family);position:relative}.btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 24px #00000026}.footer{padding:48px 0 32px;border-top:1px solid rgba(0,0,0,.06)}.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}.footer-brand{max-width:320px}.footer-logo{font-size:1.3rem;font-weight:800;color:var(--color-primary);margin-bottom:12px;display:flex;align-items:center;gap:8px}.footer-logo-img{width:28px;height:28px;object-fit:contain}.footer-info p{font-size:.85rem;color:var(--color-text-light);line-height:1.7}.footer-links{display:flex;gap:32px}.footer-links a{font-size:.9rem;color:var(--color-text-secondary);transition:color .2s}.footer-links a:hover{color:var(--color-primary)}.footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid rgba(0,0,0,.04);text-align:center;font-size:.8rem;color:var(--color-text-light)}@media(max-width:1024px){.hero-title{font-size:2.6rem}.section-title{font-size:2rem}.features-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.hero-inner{grid-template-columns:1fr;text-align:center;gap:48px}.hero-desc{margin-inline:auto}.hero-buttons{justify-content:center}.hero-title{font-size:2.2rem}.phone-frame{width:240px;height:500px}.stats-inner{grid-template-columns:1fr;gap:12px}.stat-item{padding:16px 20px}.stat-number{font-size:1.6rem}.features-grid{grid-template-columns:1fr}.showcase-row,.showcase-row.reverse{grid-template-columns:1fr;gap:40px}.showcase-row.reverse .showcase-visual{order:0}.showcase-phone{width:220px;height:460px}.showcase-phone.landscape{width:100%;max-width:380px;height:214px}.cta-card{padding:48px 24px}.cta-title{font-size:1.6rem}.footer-inner{flex-direction:column}.footer-links{flex-direction:column;gap:12px}.section-title{font-size:1.7rem}}