.ai4u-sub .a4-page{padding:32px 0;margin:0;color:var(--ink);scroll-margin-top:100px}
.a4-page .a4-inner{width:min(calc(100% - 48px),1120px);margin:0 auto;min-width:0}
.a4-page .a4-eyebrow{margin:0 0 16px;font-size:12px;font-weight:800;letter-spacing:.14em;color:#3154bb}
.a4-page .a4-title{font-size:clamp(40px,4.4vw,66px);line-height:1.18;letter-spacing:-.055em;margin:0 0 28px}
.a4-page .a4-heading{font-size:clamp(28px,3vw,44px);line-height:1.35;letter-spacing:-.055em;margin:0;max-width:900px}
.a4-page .a4-lead{margin:22px 0 14px;color:#35476c;font-weight:600}.a4-page .a4-body{margin:0;color:#435474;max-width:900px}
.ai4u-sub .a4-bg-wash{background:var(--wash)}
.a4-page .a4-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:48px;align-items:center}.a4-page .a4-copy,.a4-page .a4-diagram{min-width:0}
.a4-page :is(ul,ol){list-style:none;padding:0;margin:32px 0 0}.a4-page li{margin:0;line-height:1.8;font-size:16px;min-width:0}
.a4-page .a4-architecture{position:relative;background:var(--wash);padding:0 0 0 40px;border:1px solid #c8d5f4}
.a4-page .a4-connector{position:absolute;inset:0;width:100%;height:100%;color:var(--blue);pointer-events:none}
.a4-page .a4-architecture-list{position:relative;margin:0;padding:22px 24px 22px 16px}.a4-architecture-list li{padding:22px 0}.a4-architecture-list li+li{border-top:1px solid #c8d5f4}
.a4-page .a4-table{margin:32px 0 0}.a4-page .a4-table th{width:28%;font-size:17px;background:var(--wash);color:var(--ink)}.a4-page .a4-table td{font-size:17px;line-height:1.8}.a4-table figcaption{color:#435474;margin-top:14px}
.a4-page .a4-connections{margin:0;border-top:2px solid var(--blue);padding-top:24px}.a4-connections li+li{margin-top:28px}
.a4-page .a4-permissions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.a4-permissions li{padding:20px 0;border-top:2px solid #a9b8f3}
.a4-page .a4-lanes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;counter-reset:lane}
.a4-lanes li{counter-increment:lane;padding:24px 0;border-top:2px solid #a9b8f3;border-bottom:1px solid #d2dff5;transition:border-color .6s ease}
.a4-lanes li:before{content:counter(lane,decimal-leading-zero);display:block;margin-bottom:14px;color:var(--blue);font-size:15px;font-weight:800}
.a4-page .a4-environments{margin:0;border-left:2px solid var(--blue);padding-left:24px}.a4-environments li+li{margin-top:26px}
.a4-page .a4-reviews{margin-top:32px}.a4-page .a4-review{border-top:1px solid #aabce4;margin:0;padding:18px 0}.a4-review summary{cursor:pointer;font-size:17px;line-height:1.8}.a4-page .a4-review-copy{font-size:16px;margin:18px 0 0}
.a4-page .a4-tabs{margin:32px 0 24px;gap:16px;display:flex;flex-wrap:wrap}.a4-page .a4-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}.a4-page .a4-tab [aria-selected="true"]{background:var(--blue);color:#fff;border-color:var(--blue)}
.a4-page .a4-hand{border-left:3px solid #a9b8f3;padding:16px 20px;margin:0 0 18px}.a4-page .a4-hand-copy{margin:0}.a4-page .a4-hand[hidden]{display:none}
.a4-page .a4-final{display:flex;gap:28px;flex-wrap:wrap}.a4-page .a4-actions{margin-top:28px}.a4-page a:not(.wp-block-button__link){color:#2448c2;text-decoration:underline;text-underline-offset:4px}.a4-page :is(a,summary):focus-visible{outline:3px solid #778fea;outline-offset:5px}
.a4-page.a4-active .a4-lanes li{border-color:var(--blue)}.a4-page .reveal{animation:a4-entry .6s ease-out both}
@keyframes a4-entry{from{transform:translateY(12px);opacity:.85}to{transform:none;opacity:1}}
@media(max-width:900px){.a4-page .a4-layout{grid-template-columns:1fr;gap:32px}}
@media(max-width:580px){.ai4u-sub .a4-page{padding:24px 0}.a4-page .a4-inner{width:calc(100% - 40px)}.a4-page :is(.a4-permissions,.a4-lanes){grid-template-columns:1fr;gap:24px}.a4-page li{font-size:15px}.a4-page .a4-architecture{padding-left:20px}.a4-page .a4-architecture-list{padding:12px 20px}.a4-page .a4-final{display:block}.a4-final li+li{margin-top:18px}.a4-page .a4-table :is(th,td){font-size:15px;padding:16px 12px}.a4-page .a4-table th{width:30%}}
@media(prefers-reduced-motion:reduce){.a4-page .reveal{animation:none}.a4-lanes li{transition:none}}

/* Explanatory media and readable list groups reuse the shared component tokens. */
:is(.a4-page,.a4-section) .a-img-feature{width:min(calc(100% - 40px),1120px);margin:36px auto 0}
:is(.a4-page,.a4-section) .a-img-figure{margin:0!important;min-width:0}
:is(.a4-page,.a4-section) .a-img-figure img{display:block;width:100%;height:auto;border-radius:8px}
:is(.a4-page,.a4-section) .a-img-figure figcaption{margin:12px 0 0!important;color:var(--ink);font-size:14px;line-height:1.7;text-align:left}
:is(.a4-page,.a4-section) .a-img-hero-image{min-width:0;align-self:start}
:is(.a4-page,.a4-section) .a-img-items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:24px 0 0;padding:0;list-style:none}
:is(.a4-page,.a4-section) .a-img-items>li{position:relative;min-width:0;margin:0!important;padding:22px!important;border:1px solid var(--line);border-radius:8px;background:var(--white,#fff);color:var(--ink);font-size:15px;line-height:1.8}
:is(.a4-page,.a4-section) .a-img-items>li::before{content:none}
:is(.a4-page,.a4-section) .a-img-existing{gap:inherit}
:is(.a4-page,.a4-section) .a-img-kicker{margin:0}
:is(.a4-page,.a4-section) .a-img-cta-panel{height:4px;width:72px;background:var(--blue);margin-top:24px}
@media(max-width:1024px){:is(.a4-page,.a4-section) .a-img-items{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:768px){:is(.a4-page,.a4-section) .a-img-hero-layout{grid-template-columns:1fr!important}:is(.a4-page,.a4-section) .a-img-hero-image{order:-1}:is(.a4-page,.a4-section) .a-img-feature{width:100%;margin-top:28px}}
@media(max-width:680px){:is(.a4-page,.a4-section) .a-img-items{grid-template-columns:1fr;gap:12px}:is(.a4-page,.a4-section) .a-img-items>li{padding:18px!important}}

.a4-page .a4-layout-hero>.a4-diagram{grid-column:1/-1;max-width:1000px;width:100%;margin-inline:auto}