:root{--primary:#0ea5e9;--dark:#0f172a;--dark2:#1e293b;--text:#334155;--border:#e2e8f0}*,:after,:before{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Inter,sans-serif;background:#fff;color:var(--text)}nav{background:var(--dark);padding:0 5%;height:64px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 2px 24px rgba(0,0,0,.5);position:-webkit-sticky;position:sticky;top:0;z-index:100}.nav-logo{color:#fff;font-size:1.35rem;font-weight:900;text-decoration:none;letter-spacing:-.5px}.nav-logo span{color:var(--primary)}.back-link{color:#94a3b8;font-size:.85rem;text-decoration:none}.back-link:hover{color:#fff}.lang-toggle{display:flex;gap:6px}.lang-btn{background:transparent;border:1px solid #334155;color:#94a3b8;padding:4px 11px;border-radius:20px;cursor:pointer;font-size:.78rem;font-weight:700;font-family:inherit;transition:all .2s}.lang-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.hero{background:linear-gradient(135deg,var(--dark) 0,var(--dark2) 100%);padding:60px 5% 50px;text-align:center}.hero h1{color:#fff;font-size:2rem;font-weight:900;margin-bottom:10px}.hero p{color:#64748b;font-size:.9rem}.content{max-width:780px;margin:0 auto;padding:60px 5% 80px}.content h2{font-size:1.1rem;font-weight:800;color:var(--dark);margin:36px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--border)}.content h2:first-child{margin-top:0}.content p{font-size:.925rem;line-height:1.8;color:#475569;margin-bottom:10px}.content ul{padding-left:20px;margin-bottom:10px}.content li{font-size:.925rem;line-height:1.8;color:#475569;margin-bottom:4px}.content strong{color:var(--dark)}.highlight{background:#f0f9ff;border:1px solid #bae6fd;border-left:4px solid var(--primary);border-radius:8px;padding:14px 18px;margin:16px 0;font-size:.9rem;color:var(--text)}footer{background:#020617;color:#334155;text-align:center;padding:24px 5%;font-size:.78rem;line-height:1.8}footer a{color:var(--primary);text-decoration:none}