:root{--text-color: #111;--bg-color: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);--muted-color: #666;--accent-color: #007AFF;--accent-light: #E3F2FD;--border-color: #e0e0e0;--shadow-light: 0 2px 8px rgba(0, 0, 0, .04);--shadow-medium: 0 4px 16px rgba(0, 0, 0, .08);--gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif;background:linear-gradient(-45deg,#f5f7fa,#c3cfe2,#e0c3fc,#8ec5fc);background-size:400% 400%;animation:gradientShift 20s ease infinite;color:var(--text-color);line-height:1.5;min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.fade-in{animation:fadeInUp .8s ease-out forwards;opacity:0;transform:translateY(30px)}@keyframes fadeInUp{to{opacity:1;transform:translateY(0)}}header{padding:24px 20px;text-align:center;background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100;transition:all .3s ease}.logo{font-size:28px;font-weight:800;letter-spacing:-.02em;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}nav{margin-top:20px}nav a{color:var(--text-color);text-decoration:none;margin:0 16px;font-weight:500;padding:8px 16px;border-radius:20px;transition:all .3s cubic-bezier(.4,0,.2,1);display:inline-block;position:relative;overflow:hidden}nav a:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,var(--accent-light) 0%,rgba(227,242,253,.5) 100%);border-radius:20px;opacity:0;transition:opacity .3s cubic-bezier(.4,0,.2,1);z-index:-1}nav a.active{color:var(--accent-color)}nav a.active:before{opacity:1}nav a:hover{color:var(--accent-color);transform:translateY(-2px)}nav a:hover:before{opacity:1}main{flex:1;padding:80px 20px;position:relative}main:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(120,119,198,.2) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,118,117,.2) 0%,transparent 50%),radial-gradient(circle at 40% 80%,rgba(255,200,124,.2) 0%,transparent 50%);pointer-events:none}.container{max-width:800px;margin:0 auto;position:relative;z-index:2;background:#fffffff2;padding:48px;border-radius:24px;box-shadow:var(--shadow-medium);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-color)}h1{font-size:48px;font-weight:700;margin-bottom:32px;letter-spacing:-.02em;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center;position:relative}h2{font-size:28px;font-weight:600;margin-top:40px;margin-bottom:16px;color:var(--text-color);position:relative;padding-left:20px}h2:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:28px;background:var(--gradient-primary);border-radius:2px}h3{font-size:20px;font-weight:600;margin:24px 0 12px;color:var(--text-color)}p{font-size:16px;color:var(--muted-color);margin-bottom:16px;line-height:1.7}strong{color:var(--text-color);font-weight:600}a{color:var(--accent-color);text-decoration:none;transition:color .3s ease}a:hover{color:var(--text-color)}footer{padding:32px 20px;text-align:center;font-size:14px;color:#fff;background:var(--gradient-primary);position:relative}footer:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,white,transparent)}footer a{color:#fffc;text-decoration:none;margin:0 8px;transition:color .3s ease}footer a:hover{color:#fff}@media(max-width:768px){h1{font-size:36px}h2{font-size:24px}nav a{margin:0 10px;font-size:14px;padding:8px 14px}.container{padding:32px 24px}main{padding:60px 20px}}@media(max-width:480px){h1{font-size:32px}nav a{margin:0 6px;font-size:12px;padding:6px 10px}.container{padding:24px 16px}main{padding:40px 16px}}