:root{--ntb-blue:#0b5cff;--ntb-dark:#132238;--ntb-muted:#667085;--ntb-line:#d9e2ef;--ntb-bg:#eef4fb;--ntb-good:#067647;--ntb-bad:#b42318}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;background:radial-gradient(circle at top,#fff 0,#eef4fb 55%,#e8eff8 100%);color:var(--ntb-dark);overflow-x:hidden}.ntb-install-shell{width:min(960px,100%);margin:auto;padding:clamp(14px,4vw,38px)}.ntb-install-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:20px}.ntb-install-head span{font-size:13px;font-weight:900;letter-spacing:.18em;color:var(--ntb-blue)}.ntb-install-head h1{font-size:clamp(30px,5vw,50px);margin:6px 0}.ntb-install-head p{margin:0;color:var(--ntb-muted)}.ntb-install-head>strong{background:#fff;border:1px solid var(--ntb-line);padding:10px 14px;border-radius:999px}.ntb-steps{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;margin-bottom:16px}.ntb-steps span{min-width:0;background:#fff;border:1px solid var(--ntb-line);padding:10px 8px;border-radius:12px;font-size:11px;color:var(--ntb-muted);text-align:center;overflow:hidden;text-overflow:ellipsis}.ntb-steps b{display:block;margin:auto auto 5px;width:24px;height:24px;line-height:24px;border-radius:50%;background:#eef2f6}.ntb-steps .active{border-color:var(--ntb-blue);color:var(--ntb-blue);font-weight:800}.ntb-steps .active b,.ntb-steps .done b{background:var(--ntb-blue);color:#fff}.ntb-panel{background:#fff;border:1px solid var(--ntb-line);border-radius:22px;padding:clamp(18px,4vw,34px);box-shadow:0 18px 55px rgba(36,74,120,.09)}.ntb-panel h2{margin-top:0}.ntb-checks{display:grid;gap:8px;margin:18px 0}.ntb-checks div{display:flex;justify-content:space-between;gap:14px;padding:11px 12px;border:1px solid var(--ntb-line);border-radius:11px}.ok{color:var(--ntb-good)}.bad{color:var(--ntb-bad)}.ntb-form{display:grid;gap:15px}.ntb-form label{display:grid;gap:7px;font-weight:750}.ntb-form input,.ntb-form select{width:100%;min-width:0;padding:12px 13px;border:1px solid var(--ntb-line);border-radius:11px;font:inherit;background:#fff}.ntb-form small,.ntb-note{color:var(--ntb-muted)}.ntb-two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.ntb-primary,.ntb-secondary{display:inline-block;text-decoration:none;border:0;border-radius:11px;padding:12px 16px;font-weight:800;cursor:pointer}.ntb-primary{background:var(--ntb-blue);color:#fff}.ntb-secondary{background:#eef2f6;color:var(--ntb-dark)}.ntb-alert{padding:12px 14px;border-radius:11px;margin-bottom:14px}.ntb-alert.danger{background:#fef3f2;color:var(--ntb-bad);border:1px solid #fecdca}.ntb-alert.success{background:#ecfdf3;color:var(--ntb-good);border:1px solid #abefc6}.ntb-summary{background:#f8fafc;border:1px solid var(--ntb-line);border-radius:14px;padding:14px 18px;margin-bottom:16px}.ntb-summary li{margin:8px 0}.ntb-actions{display:flex;gap:10px;flex-wrap:wrap}.ntb-final code,footer code{background:#eef2f6;padding:2px 6px;border-radius:6px}footer{text-align:center;color:var(--ntb-muted);font-size:12px;padding:18px;overflow-wrap:anywhere}@media(max-width:760px){.ntb-steps{grid-template-columns:repeat(4,minmax(0,1fr))}.ntb-two{grid-template-columns:1fr}}@media(max-width:440px){.ntb-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.ntb-panel{border-radius:16px}.ntb-primary,.ntb-secondary{width:100%;text-align:center}}