:root{--brand-primary: #4A8DFF;--brand-primary-hover: #3A7DEF;--brand-gradient: linear-gradient(135deg, #4A8DFF, #A960EE);--color-excel: #217346;--color-excel-light: #2ea85e;--color-ppt: #C43E1C;--color-ppt-light: #D95532;--color-word: #2B579A;--color-word-light: #3A6AB5;--bg-primary: #09090b;--bg-secondary: #111113;--bg-card: #18181b;--bg-card-hover: #1f1f23;--bg-elevated: #27272a;--border-primary: #27272a;--border-secondary: #3f3f46;--text-primary: #fafafa;--text-secondary: #a1a1aa;--text-muted: #71717a;--font-sans: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "Fira Code", "JetBrains Mono", "SF Mono", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--text-5xl: 3rem;--text-6xl: 3.75rem;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.75;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .3);--shadow-glow: 0 0 20px rgba(74, 141, 255, .15);--transition-fast: .15s ease;--transition-base: .25s ease;--max-width: 1200px;--header-height: 4rem}:root{--brand-accent-bg: rgba(74, 141, 255, .1);--brand-accent-border: rgba(74, 141, 255, .2);--brand-accent-glow: rgba(74, 141, 255, .3);--brand-accent-radial: rgba(74, 141, 255, .08)}[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f4f4f5;--bg-card: #ffffff;--bg-card-hover: #f4f4f5;--bg-elevated: #e4e4e7;--border-primary: #e4e4e7;--border-secondary: #d4d4d8;--text-primary: #09090b;--text-secondary: #52525b;--text-muted: #a1a1aa;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1);--shadow-glow: 0 0 20px rgba(74, 141, 255, .1);--brand-accent-bg: rgba(74, 141, 255, .08);--brand-accent-border: rgba(74, 141, 255, .15);--brand-accent-glow: rgba(74, 141, 255, .2);--brand-accent-radial: rgba(74, 141, 255, 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var(--transition-fast)}.skip-link:focus{top:var(--space-4)}.hero__mascot{margin-bottom:var(--space-6);display:flex;justify-content:center}.hero__mascot img{border-radius:50%;display:block}.hero__title-gradient{background:var(--brand-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 var(--space-6)}.section{padding:var(--space-24) 0}.section__label{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-1) var(--space-4);font-size:var(--text-sm);font-weight:600;color:var(--brand-primary);background:var(--brand-accent-bg);border:1px solid var(--brand-accent-border);border-radius:var(--radius-full);margin-bottom:var(--space-6)}.section__title{font-size:var(--text-4xl);font-weight:800;margin-bottom:var(--space-4);letter-spacing:-.025em}.section__subtitle{font-size:var(--text-lg);color:var(--text-secondary);max-width:640px;line-height:var(--leading-relaxed)}.header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-height);display:flex;align-items:center;background:#09090bcc;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-primary);transition:background var(--transition-base)}[data-theme=light] .header{background:#fffc}.header__inner{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:var(--max-width);margin:0 auto;padding:0 var(--space-6)}.header__logo{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-lg);font-weight:700;color:var(--text-primary)}.header__logo img{width:32px;height:32px;border-radius:var(--radius-sm)}.header__nav{display:flex;align-items:center;gap:var(--space-8)}.header__link{font-size:var(--text-sm);font-weight:500;color:var(--text-secondary);transition:color var(--transition-fast)}.header__link:hover,.header__link--active{color:var(--text-primary)}.header__actions{display:flex;align-items:center;gap:var(--space-4)}.theme-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-md);color:var(--text-secondary);transition:all var(--transition-fast)}.theme-toggle:hover{color:var(--text-primary);background:var(--bg-card)}.theme-toggle svg{width:18px;height:18px}.mobile-toggle{display:none;flex-direction:column;gap:5px;width:24px;padding:0;background:none;border:none;cursor:pointer}.mobile-toggle span{display:block;width:100%;height:2px;background:var(--text-primary);border-radius:1px;transition:all var(--transition-fast)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);font-size:var(--text-sm);font-weight:600;border-radius:var(--radius-xl);transition:all var(--transition-fast);white-space:nowrap}.btn--primary{background:var(--brand-primary);color:#fff}.btn--primary:hover{background:var(--brand-primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-lg),0 0 20px var(--brand-accent-glow)}.btn--secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-secondary)}.btn--secondary:hover{background:var(--bg-card-hover);border-color:var(--text-muted);transform:translateY(-1px)}.btn--large{padding:var(--space-4) var(--space-8);font-size:var(--text-base)}.btn--icon-right svg{width:16px;height:16px;transition:transform var(--transition-fast)}.btn--icon-right:hover svg{transform:translate(3px)}.card{background:var(--bg-card);border:1px solid 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img{width:28px;height:28px;border-radius:var(--radius-sm)}.footer__brand-desc{font-size:var(--text-sm);color:var(--text-muted);line-height:var(--leading-relaxed)}.footer__columns{display:flex;gap:var(--space-16)}.footer__column h4{font-size:var(--text-sm);font-weight:600;color:var(--text-primary);margin-bottom:var(--space-4);text-transform:uppercase;letter-spacing:.05em}.footer__column a{display:block;font-size:var(--text-sm);color:var(--text-muted);padding:var(--space-1) 0;transition:color var(--transition-fast)}.footer__column a:hover{color:var(--text-primary)}.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:var(--space-8);border-top:1px solid var(--border-primary);font-size:var(--text-sm);color:var(--text-muted)}.scroll-progress{position:fixed;top:0;left:0;height:2px;background:var(--brand-gradient);z-index:101;transition:width 50ms linear}.btn:focus-visible,.header__link:focus-visible,.header__logo:focus-visible,.theme-toggle:focus-visible,.mobile-toggle:focus-visible,.footer__column a:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:var(--radius-sm)}.card:focus-visible,.card:focus-within{outline:2px solid var(--brand-primary);outline-offset:2px}@media(max-width:768px){.header{background:var(--bg-primary);backdrop-filter:none;-webkit-backdrop-filter:none}[data-theme=light] .header{background:var(--bg-primary)}.header__nav{position:fixed;top:var(--header-height);left:0;right:0;bottom:0;flex-direction:column;align-items:flex-start;gap:0;padding:var(--space-6);background:var(--bg-primary);border-top:1px solid var(--border-primary);transform:translate(100%);transition:transform var(--transition-base);z-index:99}.header__nav.is-open{transform:translate(0)}.header__nav .header__link{font-size:var(--text-lg);padding:var(--space-4) 0;width:100%;border-bottom:1px solid var(--border-primary)}.mobile-toggle{display:flex}.section__title{font-size:var(--text-3xl)}.footer__inner{flex-direction:column;gap:var(--space-10)}.footer__columns{flex-wrap:wrap;gap:var(--space-10)}.footer__bottom{flex-direction:column;gap:var(--space-4);text-align:center}}@media(max-width:480px){.container{padding:0 var(--space-4)}.section{padding:var(--space-16) 0}.section__title{font-size:var(--text-2xl)}.btn--large{width:100%}}.steps__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-8)}.step-card{text-align:center}.step-card__number{width:48px;height:48px;display:flex;align-items:center;justify-content:center;margin:0 auto var(--space-5);font-size:var(--text-lg);font-weight:800;color:var(--brand-primary);background:var(--brand-accent-bg);border:1px solid var(--brand-accent-border);border-radius:var(--radius-full)}.step-card__title{font-size:var(--text-lg);font-weight:700;margin-bottom:var(--space-3)}.step-card__desc{font-size:var(--text-sm);color:var(--text-secondary);line-height:var(--leading-relaxed)}.cta-banner{text-align:center;padding:var(--space-16);background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--radius-2xl);position:relative;overflow:hidden}.cta-banner:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0%,var(--brand-accent-radial),transparent 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