.story-15{--bg:#f1f0ec;--ink:#273332;--accent:#94501f;--panel:#dde8df}

.story{background:var(--bg);color:var(--ink);overflow:clip;font-family:"Yu Gothic UI",Meiryo,sans-serif;line-height:1.85}.story *{box-sizing:border-box}.story .wrap{width:min(1280px,90%);margin-inline:auto}.story h2,.story h3,.story p,.story figure{margin:0}.story .hero{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);align-items:center;gap:clamp(24px,4vw,72px);min-height:min(780px,86svh);padding-block:clamp(46px,7vw,108px)}.story .pitch{position:relative;z-index:1}.story h1{font-size:clamp(.9rem,1.22vw,1.1rem);font-weight:650;line-height:1.7;margin:.9rem 0 1.5rem}.story .display{font-size:clamp(2.35rem,4.1vw,4.6rem);font-weight:730;line-height:1.33;letter-spacing:-.055em;line-break:strict;word-break:auto-phrase}.story .lead{margin:1.35rem 0;max-width:36em}.story .word{font:italic 400 clamp(1.25rem,2.2vw,2.3rem)/1.15 Georgia,serif;color:var(--accent)}.story .visual{min-width:0}.story .visual svg{display:block;width:100%;height:auto}.story figcaption{display:flex;justify-content:space-between;gap:10px;border-top:1px solid currentColor;padding-top:.55rem;margin-top:.7rem;color:var(--accent);font:500 .76rem/1.5 monospace}.story .cta{display:inline-flex;align-items:center;justify-content:space-between;gap:1.5em;background:var(--ink);color:var(--bg);font-weight:700;padding:.65em 1.25em;text-decoration:none;min-height:46px}.story .cta::after{content:'↗';font-family:Arial}.story .cta:hover{box-shadow:inset 0 -3px var(--accent)}.story .intro,.story .demo,.story .service,.story .closing{padding-block:clamp(52px,7vw,110px)}.story .intro{border-top:1px solid color-mix(in srgb,var(--ink) 32%,transparent)}.story .kicker{font:600 .79rem/1.4 monospace;letter-spacing:.1em;color:var(--accent);margin-bottom:1rem}.story h2{font-size:clamp(1.75rem,3.3vw,3.4rem);line-height:1.4;letter-spacing:-.04em;word-break:auto-phrase}.story h3{font-size:clamp(1.18rem,1.85vw,1.6rem);line-height:1.5}.story .intro .inner,.story .service .inner,.story .closing .inner{display:grid;grid-template-columns:1fr 1fr;gap:clamp(25px,5vw,80px);align-items:start}.story .demo{background:var(--panel)}.story .demo .note{margin:1rem 0 1.75rem;max-width:58em}.story .instrument{display:grid;grid-template-columns:minmax(225px,.72fr) minmax(0,1.28fr);gap:clamp(14px,3vw,44px);border-top:2px solid var(--accent);padding-top:1.5rem}.story .keys{display:flex;align-content:flex-start;align-items:flex-start;gap:9px;flex-wrap:wrap}.story .keys label{display:flex;align-items:center;gap:.4em;flex-wrap:wrap;font-weight:650}.story select,.story button{color:var(--ink);background:var(--bg);border:1px solid currentColor;padding:.55em .85em;min-height:44px;border-radius:3px;font-size:1rem;max-width:100%}.story option{background:var(--bg);color:var(--ink)}.story button:active{transform:translateY(1px)}.story button:hover,.story button[aria-pressed=true]{background:var(--ink);color:var(--bg)}.story .keys select{width:100%}.story .keys input{width:20px;height:20px}.story [data-reset]{background:transparent;text-decoration:underline}.story .output{padding:clamp(20px,3vw,46px);background:var(--bg);min-height:12rem;overflow-wrap:anywhere;border-left:3px solid var(--accent)}.story .output h3,.story .output h4{margin:.4em 0}.story .output article,.story .output aside{padding:.8em 0;border-top:1px solid color-mix(in srgb,var(--ink) 30%,transparent)}.story .output article p{margin:.25em 0}.story .output small{font-weight:650;color:var(--accent)}.story .demo .cta{margin-top:1.7rem}.story .service article+article{border-top:1px solid var(--accent);margin-top:1.4em;padding-top:1.4em}.story .service h3,.story .closing h3{margin-bottom:.6rem}.story .closing{background:var(--panel)}.story details{border-block-start:1px solid currentColor;padding:.6em 0}.story summary{font-weight:700;padding:.65em 0;min-height:44px}.story details p{padding:.5em 0}.story .closing .cta{margin-top:1.2em}
@media(min-width:801px){.story .hero{position:relative}}
@media(max-width:800px){.story .hero,.story .instrument,.story .intro .inner,.story .service .inner,.story .closing .inner{grid-template-columns:1fr}.story .hero{min-height:0;gap:26px;padding-block:36px}.story .display{font-size:clamp(2.05rem,6vw,3.2rem)}.story .visual{width:min(100%,560px);margin:auto}.story .kicker{margin-bottom:.6rem}.story .intro,.story .demo,.story .service,.story .closing{padding-block:46px}.story .keys{align-items:center}.story .keys label{min-height:44px}.story h1{margin:.5rem 0 .9rem}.story .lead{margin:1em 0}}

.story-15 .hero{display:flex;flex-direction:column;align-items:stretch;gap:1.9rem}.story-15 .pitch{max-width:920px}.story-15 .visual svg{height:clamp(200px,26vw,335px);background:linear-gradient(90deg,#d9e7dc 50%,#f7bc8c 50%)}.story-15 .visual path:nth-child(odd){animation:handover .7s ease-out}.story-15 .service{background:linear-gradient(90deg,#e5ede5 50%,#f8e3d0 50%)}.story-15 .keys label{width:46%;flex-grow:1}.story-15 .output{border:3px double #44614d}.story-15 .output.changed{animation:handover .45s ease-out}
@keyframes handover{from{transform:translateX(-30px)}}
@media(max-width:800px){.story .hero,.story .instrument,.story .pitch{display:block}.story .visual{margin:20px auto 0;transform:none}.story .visual svg{height:auto;max-height:285px}.story .output{margin-top:1.2rem}.story .hero{padding-block:30px}.story .intro .inner,.story .service .inner,.story .closing .inner{grid-template-columns:minmax(0,1fr)}.story .keys select{width:100%}.story .keys label{flex:1 1 10rem}.story .visual figcaption{font-size:.73rem}}

.story-15 .stage-visual{grid-column:1/-1;display:block;min-width:0;overflow:hidden;margin-bottom:.5rem}
.story-15 .stage-visual svg{display:block;width:100%;height:auto;max-height:300px}
.story-15 .stage-visual svg g,.story-15 .stage-visual svg rect{transition:transform .6s cubic-bezier(.22,.72,.24,1),translate .6s,opacity .35s,scale .45s}
.story-15 .role-ticket[data-lane=human]{transform:translateX(-211px)}.story-15 .role-ticket[data-lane=assist]{transform:translateX(211px)}.story-15 .gate-arm{transform-origin:309px 227px}.story-15 .role-yard[data-cleared=true] .gate-arm{transform:rotate(-62deg)}
html[data-motion=reduced] .story-15 .stage-visual *,html[data-page-paused] .story-15 .stage-visual *{transition:none!important;animation:none!important}
@media(prefers-reduced-motion:reduce){.story-15 .stage-visual *{transition:none!important;animation:none!important}}

.hero .display { overflow-wrap: normal; line-break: strict; text-wrap: balance; }
.hero .display > [data-wrap-group] { display: inline-block; white-space: nowrap; }


.ai-feature,
.ai-notes {
  padding: clamp(48px, 7vw, 104px) 0;
}
.ai-frame {
  width: min(1150px, 90%);
  margin: 0 auto;
  min-width: 0;
}
.ai-frame > * {
  min-width: 0;
}
.ai-feature h2,
.ai-notes h2 {
  margin: 0 0 0.38em;
  font-size: clamp(1.85rem, 3.9vw, 3.9rem);
  line-height: 1.25;
  letter-spacing: -0.052em;
  color: inherit;
  word-break: auto-phrase;
  text-wrap: balance;
}
.ai-feature header > p:last-child,
.ai-feature .ai-frame > div:first-child > p:last-child {
  max-width: 35em;
}
.ai-caption {
  margin: 0 0 1rem;
  font-weight: 730;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}
.ai-feature p:not(.ai-caption),
.ai-notes p {
  line-height: 1.85;
}
.ai-notes h2 {
  font-size: clamp(1.55rem, 2.9vw, 2.8rem);
}
.ai-notes .ai-notes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 4.5vw, 66px);
  margin-top: 1.65rem;
}
.ai-notes h3 {
  margin: 0.4rem 0 0.65rem;
  font-size: clamp(1.1rem, 1.65vw, 1.48rem);
  line-height: 1.55;
  word-break: auto-phrase;
  text-wrap: balance;
}
.ai-notes p {
  margin: 0;
}
.ai-jump {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  margin: 0.24rem 0.6rem 0.24rem 0;
  min-height: 44px;
  padding: 0.35em 0;
  font-size: 0.86rem;
  font-weight: 700;
  color: inherit;
  text-underline-offset: 0.32em;
}
.ai-jump:after {
  content: "↓";
}
@media (max-width: 740px) {
  .ai-notes .ai-notes-grid {
    grid-template-columns: 1fr;
  }
  .ai-frame {
    width: 89%;
  }
}

.handover {
  background: #283831;
  color: #fcf8ed;
}
.handover .ai-frame {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: center;
  gap: clamp(20px, 5vw, 84px);
}
.handover h2 {
  font-family: "Yu Mincho", serif;
}
.handover-work {
  border: 1px solid #cad1bd;
  background: #dce9da;
  color: #26352e;
}
.handover-lanes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  text-align: center;
  font-weight: 780;
  letter-spacing: 0.08em;
}
.handover-lanes span {
  padding: 1rem 0.5rem;
}
.handover-lanes span + span {
  background: #efae7b;
}
.handover-track {
  background: linear-gradient(90deg, #c2d9c2 50%, #f2be99 50%);
  height: 54px;
  position: relative;
  overflow: hidden;
}
.handover-track:before {
  content: "";
  height: 1px;
  background: #6b7362;
  position: absolute;
  left: 10%;
  right: 10%;
  top: 50%;
}
.handover-track i {
  position: absolute;
  top: 8px;
  left: 16%;
  width: 25%;
  text-align: center;
  padding: 0.4em;
  border: 1px solid #676f5a;
  border-radius: 1px;
  background: #fffbed;
  color: #25322b;
  font-size: 0.77rem;
  transform: rotate(-4deg);
  font-style: normal;
  font-weight: 750;
  box-shadow: 2px 3px 0 #777b6740;
}
.handover-work:has(input[value="person"]:checked) .handover-track i {
  left: 65%;
  transform: rotate(3deg);
}
.handover-ticket {
  background: #fffbed;
  padding: clamp(18px, 3vw, 42px);
  border-top: 2px dashed #625e51;
}
.handover-ticket > p {
  font:
    650 clamp(1.35rem, 2.6vw, 2.25rem) / 1.5 "Yu Mincho",
    serif;
  margin: 0.5em 0;
}
.handover-ticket fieldset {
  padding: 0;
  border: 0;
  margin: 1em 0;
}
.handover-ticket label {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  min-height: 44px;
  margin-right: 0.7em;
  cursor: pointer;
  font-weight: 700;
}
.handover-ticket input {
  accent-color: #405c42;
  width: 1.12rem;
  height: 1.12rem;
}
.handover-ticket h3 {
  font-size: 1.14rem;
  color: #354e3c;
  margin-bottom: 0.5em;
}
.handover-ticket:has(input[value="assist"]:checked) .handover-person,
.handover-ticket:has(input[value="person"]:checked) .handover-assist {
  display: none;
}
.story-15 .ai-notes {
  background: #e5e9dd;
}
.story-15 .ai-notes article:first-child {
  border-left: 6px solid #84a28a;
  padding-left: 1.2em;
}
.story-15 .ai-notes article:nth-child(2) {
  border-left: 6px solid #bc7648;
  padding-left: 1.2em;
}
@media (prefers-reduced-motion: no-preference) {
  html[data-motion="normal"] .handover-track i {
    transition:
      left 0.65s cubic-bezier(0.24, 0.76, 0.17, 1),
      transform 0.58s;
  }
  html[data-motion="normal"] .handover[data-seen="true"] .handover-ticket {
    animation: ticket-unfold 0.65s both;
  }
  @keyframes ticket-unfold {
    from {
      transform-origin: top;
      transform: perspective(900px) rotateX(-17deg);
    }
  }
}
@media (max-width: 740px) {
  .handover .ai-frame {
    grid-template-columns: 1fr;
  }
}
.handover {
  color: #2b362c;
  background: linear-gradient(90deg, #dee7d8 53%, #f3d4b6 53%);
  border-block: 1px solid #a9ad98;
}
.handover header {
  padding-block: 1.4rem;
}
.handover header .ai-caption {
  display: inline-block;
  border-bottom: 1px solid #6f7f68;
  padding-bottom: 0.45rem;
}
.handover .ai-frame {
  grid-template-columns: 0.94fr 1.06fr;
}
.handover h2 {
  font-size: clamp(2.2rem, 4vw, 3.9rem);
  font-family: "Yu Gothic", sans-serif;
  letter-spacing: -0.065em;
}
.handover-work {
  border: 2px solid #687360;
  box-shadow: 9px 9px 0 #837f6039;
}
.handover-ticket {
  background: #fffdf0;
}
.handover-lanes span:first-child {
  background: #abc6a8;
}
.handover-ticket > p {
  margin: 0.55em 0;
}
.handover-lanes {
  letter-spacing: 0.15em;
}
@media (max-width: 740px) {
  .handover {
    background: linear-gradient(170deg, #dee7d8 43%, #f3d4b6 43%);
  }
  .handover .ai-frame {
    grid-template-columns: 1fr;
  }
}

.story-15 .hero .role-counter { height: auto; max-height: 370px; background: linear-gradient(90deg,#304a42 50%,#efb388 50%); }
.story-15 .role-counter path { animation: none; }
@media (prefers-reduced-motion: no-preference) {
  html[data-motion="normal"] .counter-docket { animation: pass-to-review 7s cubic-bezier(.45,0,.35,1) infinite; }
}
@keyframes pass-to-review {
  0%, 100% { transform: translate(119px, -2px) rotate(1deg); }
  30% { transform: translate(45px, -11px) rotate(.5deg); }
  61% { transform: translate(-133px, 4px) rotate(-1deg); }
  75% { transform: translate(-110px, 0); }
}
.story-15 .signoff-stub { grid-column: 1 / -1; max-width: 58rem; width: 100%; justify-self: center; margin: 0; padding: 0; color: #2d3b31; background: #fff9e8; border: 1px solid #928373; box-shadow: 4px 5px #c9cabd; }
.story-15 .signoff-stub figcaption { margin: 0; padding: .7rem 1rem; color: #3d3b2b; background: #eddec4; border: 0; font-family: inherit; font-size: .85rem; font-weight: 700; line-height: 1.5; }
.signoff-body { display: grid; grid-template-columns: 1fr 1fr; }
.signoff-body > div { padding: clamp(12px,3vw,30px); }
.signoff-body > div + div { border-left: 2px dashed #ab9271; background: #e4eddf; }
.signoff-body small { font-weight: 700; color: #475744; }
.story-15 .signoff-body p { margin: .8rem 0 .2rem; }
.signoff-body strong { font: 700 clamp(1rem,2.1vw,1.55rem)/1.55 "Yu Mincho",serif; }
.signoff-edge { position: relative; display: flex; justify-content: space-between; align-items: center; padding: .5rem 3%; min-height: 3.7rem; border-block: 1px dashed #ad997a; background: #f3e9ce; color: #665740; font-weight: 700; }
.signoff-stamp { position: absolute; top: .6rem; left: calc(18% + var(--cg-progress, .62) * 50%); padding: .05rem .45rem; color: #944028; background: #fff5dc; border: 3px double currentColor; font: 750 1rem/1.5 "Yu Mincho",serif; transform: rotate(calc(-14deg + var(--cg-progress, .62) * 11deg)) scale(calc(1.14 - var(--cg-progress, .62) * .17)); }
.story-15 .signoff-note { margin: 0; padding: .75rem 1rem; font-size: .93rem; }
@media (max-width: 800px) {
  .story-15 .hero { display: grid; grid-template-columns: minmax(0,1fr); gap: .7rem; }
  .story-15 .hero .pitch { display: contents; }
  .story-15 .hero .word { grid-row: 1; }
  .story-15 .hero h1 { grid-row: 2; margin: 0; }
  .story-15 .hero .display { grid-row: 3; }
  .story-15 .hero .visual { grid-row: 4; margin: 0; width: 100%; }
  .story-15 .hero .lead { grid-row: 5; margin: .4rem 0; }
  .story-15 .counter-actions { grid-row: 6; }
}