.ai4u-sub .c3-page{padding:32px 0;margin:0;color:var(--ink);transition:border-color .6s ease;scroll-margin-top:100px}
.c3-page .c3-inner{width:min(calc(100% - 48px),1120px);margin:0 auto;min-width:0}
.c3-page .c3-eyebrow{margin:0 0 16px;font-size:12px;letter-spacing:.15em;color:#3154bb;font-weight:800}
.c3-page .c3-title{margin:0 0 28px;font-size:clamp(38px,4.4vw,66px);line-height:1.18;letter-spacing:-.06em}
.c3-page .c3-heading{margin:0;font-size:clamp(28px,3vw,44px);line-height:1.35;letter-spacing:-.055em;max-width:900px}
.c3-page .c3-lead{margin:22px 0 14px;color:#35476c;font-weight:600}
.c3-page .c3-body{margin:0;color:#435474;max-width:900px}
.c3-page .c3-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:48px;align-items:center}
.c3-page .c3-copy,.c3-page .c3-diagram{min-width:0}
.c3-page .c3-bg-wash,.ai4u-sub .c3-bg-wash{background:var(--wash)}
.ai4u-sub .c3-bg-deep{background:var(--deep);color:#fff}
.c3-bg-deep .c3-eyebrow{color:#b5c5ff}.c3-bg-deep .c3-lead,.c3-bg-deep .c3-body,.c3-bg-deep .c3-review-note{color:#d6e1f6}
.c3-page :is(ul,ol){padding:0;margin:32px 0 0;list-style:none}
.c3-page li{margin:0;min-width:0;line-height:1.7;font-size:16px}
.c3-page .c3-roadmap{counter-reset:roadmap;border-left:2px solid #adbaf3;padding-left:28px;margin:0}
.c3-roadmap li{counter-increment:roadmap;position:relative;padding:22px 0;border-bottom:1px solid var(--line)}
.c3-roadmap li:before{content:counter(roadmap,decimal-leading-zero);position:absolute;left:-42px;top:20px;color:var(--blue);background:var(--wash);font-size:13px;font-weight:800;padding:4px}
.c3-page .c3-horizontal{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;border-top:2px solid #a9b8f3;padding-top:24px}
.c3-horizontal li{border-left:3px solid var(--blue);padding-left:16px;transition:border-color .6s ease}
.c3-page .c3-goals{margin:0;padding:24px 0;border-top:2px solid var(--blue);border-bottom:1px solid var(--line)}
.c3-goals li+li{margin-top:24px}.c3-page .c3-branches{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.c3-branches li{padding-top:20px;border-top:1px solid #6680ad}.c3-page .c3-decisions{counter-reset:decision;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.c3-decisions li{counter-increment:decision;border-top:1px solid var(--line);padding-top:18px}.c3-decisions li:before{content:counter(decision,decimal-leading-zero);display:block;color:var(--blue);font-weight:800;margin-bottom:12px}
.c3-page .c3-technical{margin:0;border-left:2px solid var(--blue);padding-left:24px}.c3-technical li+li{margin-top:28px}
.c3-page .c3-vertical{padding-left:24px;border-left:2px solid #a9b8f3;max-width:850px}.c3-vertical li{padding:18px 0;border-bottom:1px solid #d9e3f5}
.c3-page .c3-review-list{margin-top:32px}.c3-page .c3-review{border-top:1px solid #6580a3;margin:0;padding:18px 0}
.c3-review summary{cursor:pointer;font-size:17px;line-height:1.8}.c3-page .c3-review-note{font-size:15px;margin:18px 0 0}
.c3-page .c3-network{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding-top:24px;border-top:2px solid #a9b8f3}
.c3-network li{padding:20px 0;border-bottom:1px solid var(--line)}.c3-network li:last-child{grid-column:1/-1}
.c3-page a:not(.wp-block-button__link){color:#2448c2;text-decoration:underline;text-underline-offset:4px}.c3-bg-deep a:not(.wp-block-button__link){color:#c7d7ff}
.c3-page .c3-final{display:flex;gap:32px;flex-wrap:wrap}.c3-page .c3-actions{margin-top:28px}
.c3-page.c3-active .c3-horizontal li{border-color:#133bc7}.c3-page :is(a,summary):focus-visible{outline:3px solid #778fea;outline-offset:5px}
.c3-page .reveal{animation:c3-entry .6s ease-out both}
@keyframes c3-entry{from{transform:translateY(12px);opacity:.85}to{transform:none;opacity:1}}
@media(max-width:900px){.c3-page .c3-layout{grid-template-columns:1fr;gap:32px}.c3-page .c3-roadmap{margin-left:14px}.c3-page .c3-decisions{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:580px){.ai4u-sub .c3-page{padding:24px 0}.c3-page .c3-inner{width:calc(100% - 40px)}.c3-page :is(.c3-horizontal,.c3-branches,.c3-decisions,.c3-network){grid-template-columns:1fr;gap:22px}.c3-page .c3-horizontal{border-top:0;padding-top:0}.c3-network li:last-child{grid-column:auto}.c3-page li{font-size:15px}.c3-page .c3-title{font-size:40px}.c3-page .c3-final{display:block}.c3-final li+li{margin-top:18px}}
@media(prefers-reduced-motion:reduce){.ai4u-sub .c3-page,.c3-horizontal li{transition:none}.c3-page .reveal{animation:none}}
.c3-page ul.ai4u-card-grid{list-style:none;border:0;padding:0;margin:28px 0 0}.c3-page ul.ai4u-card-grid>li.ai4u-card{border:1px solid var(--line);padding:20px;background:var(--white,#fff);border-radius:12px}.c3-page ol.ai4u-step-grid{border:0;padding:0;margin:28px 0 0}.c3-page ol.ai4u-step-grid>li.ai4u-step-card{border:1px solid var(--line);padding:20px;background:var(--white,#fff);border-radius:12px}.c3-page .ai4u-media-feature{margin:32px auto 0}