.header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 2rem;background-color:var(--bg-secondary);box-shadow:0 2px 8px #0000001a;position:sticky;top:0;z-index:100}.nav-list{display:flex;list-style:none;gap:2rem;margin:0;padding:0}.nav-list a{color:var(--text-primary);text-decoration:none;font-weight:500;transition:color .3s ease}.nav-list a:hover{color:var(--accent-color)}.header-actions{display:flex;gap:1rem}.theme-toggle,.language-toggle{background-color:var(--bg-tertiary);border:1px solid var(--border-color);color:var(--text-primary);padding:.5rem 1rem;border-radius:8px;cursor:pointer;font-size:1rem;font-weight:600;transition:all .3s ease}.theme-toggle:hover,.language-toggle:hover{background-color:var(--accent-color);transform:translateY(-2px)}.theme-toggle{font-size:1.2rem;padding:.5rem .8rem}@media (max-width: 768px){.header{flex-direction:column;gap:1rem}.nav-list{gap:1rem;flex-wrap:wrap;justify-content:center}}.about-section{min-height:100vh;padding:2rem;background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%);position:relative;overflow:hidden;display:flex;align-items:center}.about-section:before{content:"";position:absolute;top:0;left:0;right:0;height:300px;background:radial-gradient(ellipse at top,var(--accent-color)15,transparent 70%);pointer-events:none}.about-container{max-width:1100px;margin:0 auto;position:relative;z-index:1}.about-header{text-align:center;margin-bottom:1.5rem;animation:fadeInDown .8s ease-out}.section-title{font-size:clamp(1.8rem,4vw,2.2rem);font-weight:700;margin-bottom:.5rem;color:var(--text-primary);position:relative;display:inline-block}.section-title:after{content:"";position:absolute;bottom:-10px;left:50%;transform:translate(-50%);width:60%;height:4px;background:linear-gradient(90deg,transparent,var(--accent-color),transparent);border-radius:2px}.section-intro{font-size:.95rem;color:var(--text-secondary);max-width:600px;margin:.5rem auto 0;line-height:1.4}.about-content{display:flex;flex-direction:column;gap:1rem}.about-hero{animation:fadeIn 1s ease-out .2s both}.hero-card{background:var(--bg-primary);padding:1.5rem;border-radius:20px;text-align:center;box-shadow:0 10px 40px var(--shadow-color);border:1px solid var(--border-color);transition:all .4s 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p{margin:0}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:root[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #e8e8e8;--text-primary: #1a1a1a;--text-secondary: #4a4a4a;--accent-color: #3b82f6;--border-color: #d1d5db;--shadow-color: rgba(0, 0, 0, .1)}:root[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #242424;--bg-tertiary: #2d2d2d;--text-primary: rgba(255, 255, 255, .87);--text-secondary: rgba(255, 255, 255, .6);--accent-color: #60a5fa;--border-color: #3f3f46;--shadow-color: rgba(0, 0, 0, .3)}*{margin:0;padding:0;box-sizing:border-box}body{margin:0;background-color:var(--bg-primary);color:var(--text-primary);min-width:320px;min-height:100vh;transition:background-color .3s ease,color .3s ease}#root{width:100%;margin:0 auto}