*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f8fafc;--ink:#0f172a;--white:#ffffff;--blue:#2563eb;--teal:#0d9488;--grad:linear-gradient(95deg,#2563eb 0%,#0d9488 100%);--gray:#475569;--gray-light:#94a3b8;--border:#e2e8f0;--border-dark:#cbd5e1;--green:#16a34a;--green-bg:#ecfdf5;--blue-bg:#eff6ff;--sans:'Inter',sans-serif;--display:'Sora',sans-serif;--radius:18px;--radius-sm:12px;--shadow:0 1px 2px rgba(15,23,42,0.04),0 12px 32px rgba(15,23,42,0.08);--shadow-lg:0 24px 48px rgba(15,23,42,0.14)}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.6}nav{position:sticky;top:0;z-index:200;background:rgba(248,250,252,0.85);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--border);padding:0 5%}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1240px;margin:0 auto}.nav-logo img{height:46px;width:auto;display:block}.nav-center{display:flex;align-items:center;gap:0.15rem}.nav-center a{text-decoration:none;color:var(--gray);font-size:0.875rem;font-weight:600;padding:0.45rem 0.85rem;border-radius:100px;transition:all 0.15s;white-space:nowrap;font-family:var(--display)}.nav-center a:hover{color:var(--ink);background:var(--border)}.nav-center a.active{color:var(--blue);background:var(--blue-bg)}.nav-right{display:flex;align-items:center;gap:0.75rem}.lang-link{display:flex;align-items:center;gap:0.4rem;text-decoration:none;color:var(--gray);font-size:0.82rem;font-weight:600;padding:0.42rem 0.75rem;border:1px solid var(--border-dark);border-radius:100px;transition:all 0.15s}.lang-link:hover{border-color:var(--blue);color:var(--blue)}.has-dropdown{position:relative}.dd-arrow{font-size:0.6rem;margin-left:0.2rem;opacity:0.65;display:inline-block;transition:transform 0.15s}.has-dropdown:hover .dd-arrow{transform:rotate(180deg)}.dropdown-panel{position:absolute;top:100%;left:0;margin-top:0.4rem;background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);padding:0.45rem;min-width:235px;opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity 0.15s,transform 0.15s,visibility 0.15s;z-index:250}.has-dropdown:hover .dropdown-panel{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-panel a{display:flex;align-items:center;gap:0.55rem;padding:0.6rem 0.75rem;border-radius:10px;font-size:0.85rem;font-weight:600;color:var(--ink)!important;background:none!important}.dropdown-panel a:hover{background:var(--bg)!important}.mob-sub-label{font-size:0.72rem;font-weight:700;color:var(--gray-light);text-transform:uppercase;letter-spacing:0.06em;padding:0.85rem 0 0.35rem;font-family:var(--display)}.mob-links a.mob-sub{padding:0.6rem 0 0.6rem 0.9rem;font-size:0.95rem;font-weight:600;border-bottom:none;color:var(--gray)}.hamburger{display:none;background:none;border:none;cursor:pointer;padding:0.7rem;flex-direction:column;align-items:center;justify-content:center;gap:5px;min-width:44px;min-height:44px}.hamburger span{width:22px;height:2px;background:var(--ink);border-radius:2px;display:block;transition:all 0.3s}.mob-menu{display:none;position:fixed;inset:0;background:var(--white);z-index:150000;flex-direction:column;padding:2rem 5%}.mob-menu.open{display:flex}.mob-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:2.5rem}.mob-links{display:flex;flex-direction:column;gap:0.25rem;flex:1;overflow-y:auto}.mob-links a{text-decoration:none;color:var(--ink);font-size:1.1rem;font-weight:600;padding:0.85rem 0;border-bottom:1px solid var(--border);font-family:var(--display)}.mob-bottom{display:flex;flex-direction:column;gap:0.75rem;padding-top:1.5rem}.close-btn{background:none;border:none;cursor:pointer;font-size:1.6rem;color:var(--gray);line-height:1;padding:0.6rem;min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center}.dropdown-megamenu{min-width:680px !important;left:50% !important;transform:translateX(-50%) translateY(6px) !important;padding:1.25rem !important;}.has-dropdown:hover .dropdown-megamenu{transform:translateX(-50%) translateY(0) !important;display:block !important;}.megamenu-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;}.megamenu-col{display:flex;flex-direction:column;gap:0.4rem;}.megamenu-title{font-size:0.72rem;font-weight:700;color:var(--gray-light);text-transform:uppercase;letter-spacing:0.05em;padding-bottom:0.45rem;border-bottom:1px solid var(--border);margin-bottom:0.45rem;font-family:var(--display);}.megamenu-col a{font-size:0.82rem !important;padding:0.45rem 0.6rem !important;border-radius:8px !important;white-space:normal !important;line-height:1.3 !important;display:inline-flex !important;align-items:center !important;gap:0.6rem !important;transition:all 0.2s !important;}.megamenu-col a:hover{background:var(--blue-bg) !important;color:var(--blue) !important;}.megamenu-col a svg{width:18px !important;height:18px !important;flex-shrink:0 !important;}.article-hero{padding:3.5rem 5% 2rem;max-width:760px;margin:0 auto}.pill{display:inline-flex;align-items:center;gap:0.5rem;background:var(--white);border:1px solid var(--border-dark);border-radius:999px;padding:0.35rem 0.9rem;font-size:0.74rem;font-weight:700;color:var(--gray);margin-bottom:1rem;text-transform:uppercase;letter-spacing:0.04em}.bc{font-size:0.78rem;color:var(--gray-light);margin-bottom:1.25rem}.bc a{color:var(--gray-light);text-decoration:none}.bc a:hover{color:var(--blue)}h1{font-family:var(--display);font-size:clamp(2rem,3.6vw,2.6rem);font-weight:800;line-height:1.15;letter-spacing:-0.02em;margin-bottom:1rem;color:var(--ink)}.art-meta{font-size:0.8rem;color:var(--gray-light);font-weight:600}.toc{max-width:760px;margin:0 auto 1rem;padding:0 5%}.toc-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);padding:1.25rem 1.5rem}.toc-box p{font-size:0.78rem;font-weight:800;text-transform:uppercase;letter-spacing:0.04em;color:var(--gray-light);margin-bottom:0.7rem}.toc-box ol{margin:0 0 0 1.1rem;font-size:0.88rem}.toc-box li{margin-bottom:0.4rem}.toc-box a{color:var(--blue);text-decoration:none;font-weight:600}article{max-width:760px;margin:0 auto;padding:1.5rem 5% 4rem;font-size:1rem;color:var(--ink)}article h2{font-family:var(--display);font-size:1.55rem;font-weight:800;margin:2.5rem 0 1rem;letter-spacing:-0.01em}article h3{font-family:var(--display);font-size:1.15rem;font-weight:700;margin:1.6rem 0 0.7rem}article p{margin-bottom:1.2rem;color:var(--ink);line-height:1.75}article ul,article ol{margin:0 0 1.2rem 1.3rem}article li{margin-bottom:0.6rem;line-height:1.65}article strong{color:var(--ink)}.pro-tip{background:var(--blue-bg);border-left:4px solid var(--blue);padding:1rem;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:1.5rem 0;font-size:0.92rem;color:var(--gray)}.pro-tip strong{color:var(--blue)}.code-block{background:var(--ink);color:#e2e8f0;font-family:monospace;padding:1rem;border-radius:var(--radius-sm);margin:1.5rem 0;overflow-x:auto;font-size:0.9rem}.cta-box{background:var(--ink);border-radius:var(--radius);padding:2.25rem 2rem;text-align:center;color:white;margin:2.5rem 0}.cta-box h3{font-family:var(--display);font-weight:800;font-size:1.5rem;margin-bottom:0.6rem}.cta-box p{color:#cbd5e1;font-size:0.92rem;margin-bottom:1.4rem}.btn-primary{display:inline-flex;align-items:center;gap:0.5rem;background:var(--grad);color:white;padding:0.85rem 1.7rem;border-radius:999px;text-decoration:none;font-size:0.88rem;font-weight:700}footer{padding:2rem 5%;border-top:1px solid var(--border);background:var(--bg)}.footer-inner{max-width:1240px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}footer img{height:30px;width:auto}footer p{font-size:0.78rem;color:var(--gray-light)}.f-links{display:flex;gap:1.5rem;flex-wrap:wrap}.f-links a{font-size:0.78rem;color:var(--gray-light);text-decoration:none;font-weight:600}.f-links a:hover{color:var(--blue)}@media(max-width:768px){.nav-center{display:none}.hamburger{display:flex}footer{padding:1.5rem 5%}.footer-inner{flex-direction:column;text-align:center}.f-links{justify-content:center}}.dropdown-megamenu{min-width:680px !important;left:50% !important;transform:translateX(-50%) translateY(6px) !important;padding:1.25rem !important;}.has-dropdown:hover .dropdown-megamenu{transform:translateX(-50%) translateY(0) !important;display:block !important;}.megamenu-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;}.megamenu-col{display:flex;flex-direction:column;gap:0.4rem;}.megamenu-title{font-size:0.72rem;font-weight:700;color:var(--gray-light);text-transform:uppercase;letter-spacing:0.05em;padding-bottom:0.45rem;border-bottom:1px solid var(--border);margin-bottom:0.45rem;font-family:var(--display);}.megamenu-col a{font-size:0.82rem !important;padding:0.45rem 0.6rem !important;border-radius:8px !important;white-space:normal !important;line-height:1.3 !important;display:inline-flex !important;align-items:center !important;gap:0.6rem !important;transition:all 0.2s !important;}.megamenu-col a:hover{background:var(--blue-bg) !important;color:var(--blue) !important;}.megamenu-col a svg{width:18px !important;height:18px !important;flex-shrink:0 !important;}