:root{--ink:#14213d;--muted:#60708c;--line:#dbe4f2;--surface:#f5f8fd;--primary:#2f6fed;--primary-dark:#1e4fae;--violet:#6c5ce7;--success:#0f9d73;--warn:#fff5da;--danger:#fff0f0;--shadow:0 18px 45px rgba(29,61,112,.10);--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:var(--primary-dark);text-decoration:none}a:hover{text-decoration:underline}.skip-link{position:absolute;left:-999px;top:12px}.skip-link:focus{left:12px;background:#fff;padding:10px;border-radius:8px;z-index:20}.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,242,.8)}.nav{max-width:1160px;margin:auto;padding:14px 22px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center}.brand img{width:172px;height:auto}.nav-links{display:flex;gap:18px;margin-left:auto;align-items:center}.nav-links a{font-size:.94rem;font-weight:700;color:#425273}.nav-links a:hover{color:var(--primary);text-decoration:none}.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px}.hero{background:linear-gradient(135deg,#eff5ff 0%,#f7f4ff 100%);border-bottom:1px solid #e8eef8}.hero-inner{max-width:1160px;margin:auto;padding:76px 22px 64px;display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}.eyebrow{color:var(--primary-dark);font-weight:800;letter-spacing:.08em;text-transform:uppercase;font-size:.78rem}.hero h1{font-size:clamp(2.25rem,5vw,4.5rem);line-height:1.05;letter-spacing:-.055em;margin:14px 0 20px;max-width:730px}.hero p{font-size:1.12rem;color:var(--muted);max-width:650px}.search-shell{background:#fff;border:1px solid #d5e0f0;box-shadow:var(--shadow);border-radius:16px;padding:8px;display:flex;gap:8px;margin-top:28px;max-width:680px}.search-shell input{border:0;outline:0;flex:1;min-width:0;padding:13px 15px;font-size:1rem;color:var(--ink)}.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 17px;min-height:46px;font-weight:800;cursor:pointer;background:var(--primary);color:#fff;text-decoration:none}.button:hover{background:var(--primary-dark);text-decoration:none}.button.secondary{background:#fff;color:var(--primary-dark);border:1px solid #cbd9ee}.button.ghost{background:#edf3ff;color:var(--primary-dark)}.hero-art{position:relative;min-height:280px;border-radius:28px;background:linear-gradient(145deg,#2f6fed,#6c5ce7);overflow:hidden;box-shadow:0 28px 60px rgba(47,111,237,.25)}.hero-art:before,.hero-art:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.2);border-radius:50%}.hero-art:before{width:300px;height:300px;left:-110px;bottom:-150px}.hero-art:after{width:430px;height:430px;right:-230px;top:-210px}.network-card{position:absolute;left:14%;right:14%;top:23%;bottom:20%;background:rgba(255,255,255,.94);border-radius:20px;padding:24px;color:var(--ink);box-shadow:0 20px 40px rgba(11,30,80,.25)}.network-card .router{height:70px;border-radius:14px;background:#172b54;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;letter-spacing:.08em}.nodes{display:flex;justify-content:space-around;margin-top:28px}.node{width:52px;height:52px;border-radius:16px;background:#eaf1ff;display:grid;place-items:center;color:var(--primary);font-size:1.35rem}.signal{height:30px;border-left:2px dashed #a8bee9;margin:0 auto;width:1px}.section{max-width:1160px;margin:auto;padding:64px 22px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section h2{font-size:clamp(1.7rem,3vw,2.5rem);letter-spacing:-.035em;margin:0}.section-intro{color:var(--muted);max-width:680px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#fff;box-shadow:0 8px 25px rgba(29,61,112,.05)}.card:hover{border-color:#a9c5f2;transform:translateY(-2px);transition:.2s ease}.card h3{margin:0 0 8px;font-size:1.1rem}.card p{margin:0;color:var(--muted);font-size:.95rem}.ip-chip{display:inline-flex;background:#edf3ff;color:var(--primary-dark);border-radius:999px;padding:5px 10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.84rem;font-weight:800;margin-bottom:14px}.quick{background:var(--surface)}.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.quick-step{display:flex;gap:15px}.step-no{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800;flex:none}.notice{border-left:4px solid #d99a00;background:var(--warn);padding:16px 18px;border-radius:12px;color:#5c4714}.site-footer{background:#101c35;color:#d6e1f5}.footer-inner{max-width:1160px;margin:auto;padding:42px 22px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}.site-footer a{color:#c6d9ff}.site-footer p{color:#aebdd5}.page-hero{background:linear-gradient(135deg,#eff5ff,#f7f4ff);padding:58px 22px 44px;border-bottom:1px solid #e7edf7}.page-hero-inner{max-width:900px;margin:auto}.breadcrumbs{font-size:.86rem;color:var(--muted);margin-bottom:20px}.page-hero h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.1;margin:0 0 14px;letter-spacing:-.04em}.page-hero p{color:var(--muted);font-size:1.08rem;max-width:760px}.content-layout{max-width:1160px;margin:auto;padding:52px 22px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:42px}.prose{max-width:780px}.prose h2{font-size:1.7rem;margin:38px 0 12px}.prose h3{font-size:1.2rem;margin:26px 0 8px}.prose p,.prose li{color:#3f4f6c}.prose ul,.prose ol{padding-left:24px}.action-row{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0}.side-card{border:1px solid var(--line);border-radius:16px;padding:20px;background:var(--surface);height:max-content;position:sticky;top:92px}.side-card h3{margin-top:0}.side-card ul{padding-left:20px;margin-bottom:0}.warning{background:var(--danger);border-left:4px solid #d94b4b;padding:16px 18px;border-radius:12px;color:#6e2525}.checklist{display:grid;gap:10px}.check{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:13px;background:#fff}.check strong{display:block}.ip-large{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.5rem;color:var(--primary-dark);font-weight:900}.search-results{margin-top:8px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:none}.search-results a{display:block;padding:12px 15px;border-bottom:1px solid #edf1f7}.search-results a:last-child{border-bottom:0}.search-results small{display:block;color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:850px){.nav{padding:12px 18px}.nav-toggle{display:block;margin-left:auto}.nav-links{display:none;position:absolute;top:70px;left:12px;right:12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.hero-inner{grid-template-columns:1fr;padding-top:52px}.hero-art{min-height:230px}.grid,.quick-grid{grid-template-columns:repeat(2,1fr)}.content-layout{grid-template-columns:1fr}.side-card{position:static}.footer-inner{grid-template-columns:1fr 1fr}}@media(max-width:560px){.nav{gap:10px}.brand img{width:145px}.hero-inner,.section,.content-layout{padding-left:17px;padding-right:17px}.hero h1{font-size:2.45rem}.search-shell{display:block;background:transparent;border:0;box-shadow:none;padding:0}.search-shell input{width:100%;border:1px solid #d5e0f0;border-radius:12px;margin-bottom:8px}.search-shell .button{width:100%}.grid,.quick-grid{grid-template-columns:1fr}.section{padding-top:44px;padding-bottom:44px}.footer-inner{grid-template-columns:1fr}.page-hero{padding-left:17px;padding-right:17px}.action-row .button{width:100%}}

.brand-hero-card{display:flex;align-items:center;justify-content:space-between;gap:22px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px 24px;box-shadow:var(--shadow);margin:12px 0 24px}.brand-hero-card h2{margin:4px 0 6px;font-size:1.65rem}.brand-hero-card p{margin:0;color:var(--muted)}.brand-mark{width:72px;height:72px;border-radius:20px;display:grid;place-items:center;background:linear-gradient(145deg,var(--primary),var(--violet));color:#fff;font-size:1.35rem;font-weight:900;letter-spacing:.04em;box-shadow:0 12px 24px rgba(47,111,237,.2)}.brand-links{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.brand-links .ip-chip{margin:0;cursor:pointer}.two-col{grid-template-columns:repeat(2,1fr)}.brand-grid .card{min-height:190px}.brand-grid .card .ip-chip{font-size:.78rem}.brand-grid .card p{min-height:68px}@media(max-width:560px){.brand-hero-card{align-items:flex-start;padding:18px}.brand-mark{width:58px;height:58px;border-radius:16px;font-size:1.05rem}.two-col{grid-template-columns:1fr}.brand-grid .card p{min-height:0}}