.ai4u-sub .b1-page{padding:32px 0;margin:0;color:var(--ink);scroll-margin-top:100px}
.b1-page .b1-inner{width:min(calc(100% - 48px),1120px);margin:0 auto;min-width:0}
.b1-page .b1-eyebrow{margin:0 0 16px;font-size:12px;font-weight:800;letter-spacing:.14em;color:#3154bb}
.b1-page .b1-title{font-size:clamp(40px,4.4vw,66px);line-height:1.18;letter-spacing:-.055em;margin:0 0 28px}
.b1-page .b1-heading{font-size:clamp(28px,3vw,44px);line-height:1.35;letter-spacing:-.055em;margin:0;max-width:900px}
.b1-page .b1-lead{margin:22px 0 14px;color:#35476c;font-weight:600}.b1-page .b1-body{margin:0;color:#435474;max-width:900px}
.ai4u-sub .b1-bg-wash{background:var(--wash)}
.b1-page .b1-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:48px;align-items:center}.b1-page .b1-copy,.b1-page .b1-diagram{min-width:0}
.b1-page :is(ul,ol){list-style:none;padding:0;margin:32px 0 0}.b1-page li{margin:0;line-height:1.8;font-size:16px;min-width:0}
.b1-page .b1-architecture{position:relative;background:var(--wash);padding:0 0 0 40px;border:1px solid #c8d5f4}
.b1-page .b1-connector{position:absolute;inset:0;width:100%;height:100%;color:var(--blue);pointer-events:none}
.b1-page .b1-architecture-list{position:relative;margin:0;padding:22px 24px 22px 16px}.b1-architecture-list li{padding:22px 0}.b1-architecture-list li+li{border-top:1px solid #c8d5f4}
.b1-page .b1-table{margin:32px 0 0}.b1-page .b1-table th{width:28%;font-size:17px;background:var(--wash);color:var(--ink)}.b1-page .b1-table td{font-size:17px;line-height:1.8}.b1-table figcaption{color:#435474;margin-top:14px}
.b1-page .b1-connections{margin:0;border-top:2px solid var(--blue);padding-top:24px}.b1-connections li+li{margin-top:28px}
.b1-page .b1-permissions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.b1-permissions li{padding:20px 0;border-top:2px solid #a9b8f3}
.b1-page .b1-lanes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;counter-reset:lane}
.b1-lanes li{counter-increment:lane;padding:24px 0;border-top:2px solid #a9b8f3;border-bottom:1px solid #d2dff5;transition:border-color .6s ease}
.b1-lanes li:before{content:counter(lane,decimal-leading-zero);display:block;margin-bottom:14px;color:var(--blue);font-size:15px;font-weight:800}
.b1-page .b1-environments{margin:0;border-left:2px solid var(--blue);padding-left:24px}.b1-environments li+li{margin-top:26px}
.b1-page .b1-reviews{margin-top:32px}.b1-page .b1-review{border-top:1px solid #aabce4;margin:0;padding:18px 0}.b1-review summary{cursor:pointer;font-size:17px;line-height:1.8}.b1-page .b1-review-copy{font-size:16px;margin:18px 0 0}
.b1-page .b1-tabs{margin:32px 0 24px;gap:16px;display:flex;flex-wrap:wrap}.b1-page .b1-tab .wp-block-button__link{border:1px solid #94a8dd;background:#fff;color:#2448ac;border-radius:7px;font-size:16px;padding:12px 20px;min-height:48px}.b1-page .b1-tab [aria-selected="true"]{background:var(--blue);color:#fff;border-color:var(--blue)}
.b1-page .b1-hand{border-left:3px solid #a9b8f3;padding:16px 20px;margin:0 0 18px}.b1-page .b1-hand-copy{margin:0}.b1-page .b1-hand[hidden]{display:none}
.b1-page .b1-final{display:flex;gap:28px;flex-wrap:wrap}.b1-page .b1-actions{margin-top:28px}.b1-page a:not(.wp-block-button__link){color:#2448c2;text-decoration:underline;text-underline-offset:4px}.b1-page :is(a,summary):focus-visible{outline:3px solid #778fea;outline-offset:5px}
.b1-page.b1-active .b1-lanes li{border-color:var(--blue)}.b1-page .reveal{animation:b1-entry .6s ease-out both}
@keyframes b1-entry{from{transform:translateY(12px);opacity:.85}to{transform:none;opacity:1}}
@media(max-width:900px){.b1-page .b1-layout{grid-template-columns:1fr;gap:32px}}
@media(max-width:580px){.ai4u-sub .b1-page{padding:24px 0}.b1-page .b1-inner{width:calc(100% - 40px)}.b1-page :is(.b1-permissions,.b1-lanes){grid-template-columns:1fr;gap:24px}.b1-page li{font-size:15px}.b1-page .b1-architecture{padding-left:20px}.b1-page .b1-architecture-list{padding:12px 20px}.b1-page .b1-final{display:block}.b1-final li+li{margin-top:18px}.b1-page .b1-table :is(th,td){font-size:15px;padding:16px 12px}.b1-page .b1-table th{width:30%}}
@media(prefers-reduced-motion:reduce){.b1-page .reveal{animation:none}.b1-lanes li{transition:none}}

.b1-page .b1-editorial{border-left:3px solid var(--blue);padding:24px 28px;background:#fff}.b1-editorial .b1-intro{margin:0}.b1-intro li+li{margin-top:28px}.b1-page .b1-role-notes{margin-top:32px;display:grid;gap:28px}.b1-role-note{border-left:2px solid #a9b8f3;padding-left:28px}.b1-page .b1-role-copy{margin:0;font-size:20px;line-height:1.8}.b1-page .b1-checklist{display:grid;gap:24px}.b1-checklist li{position:relative;padding-left:32px}.b1-checklist li:before{content:"";position:absolute;left:0;top:7px;width:14px;height:14px;border:2px solid #a9b8f3}.b1-page .b1-case-note{margin-top:32px;border-left:3px solid var(--blue);padding:24px 28px;background:#fff}.b1-case-note .b1-case-items{margin:0}.b1-case-items li+li{margin-top:24px}.b1-page .b1-timeline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}.b1-timeline li{border-top:2px solid #a9b8f3;padding-top:24px}.b1-page .b1-connections{border-color:#a9b8f3;transition:border-color .6s ease}.b1-page.b1-active .b1-connections{border-color:var(--blue)}.b1-page .b1-lanes li:before{display:none}@media(max-width:900px){.b1-page .b1-timeline{grid-template-columns:1fr;gap:28px}}@media(prefers-reduced-motion:reduce){.b1-page .b1-connections{transition:none}}