/* NPC Agent case study: isolated from the AI+ design gallery. */
.npc-case-page { background: #fff; }
.npc-case-page .site-nav [aria-current="page"],
.npc-case-page .case-footer-links [aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
.npc-case-main { min-width: 0; }

.npc-case-hero {
  display: grid;
  grid-template-columns: minmax(400px, .68fr) minmax(0, 1.32fr);
  min-height: 620px;
  margin-top: 44px;
  overflow: hidden;
  border: 1px solid var(--dark);
  border-radius: 32px;
  background: var(--dark);
  color: #fff;
  box-shadow: 0 5px 0 var(--dark);
}

.npc-case-hero-copy { display: flex; flex-direction: column; align-items: flex-start; padding: 48px; }
.npc-case-hero h1 { margin: 34px 0 22px; font-size: clamp(54px, 5vw, 76px); font-weight: 500; line-height: .96; letter-spacing: -.045em; }
.npc-case-hero-copy > p { max-width: 460px; margin: 0; color: #d7d8dc; font-size: 18px; line-height: 1.65; text-wrap: pretty; }
.npc-case-facts { display: grid; gap: 13px; width: 100%; margin: 34px 0 0; padding-top: 26px; border-top: 1px solid rgba(185,255,102,.42); }
.npc-case-facts div { display: grid; grid-template-columns: 52px minmax(0,1fr); gap: 14px; }
.npc-case-facts dt { color: var(--green); font-size: 13px; font-weight: 600; }
.npc-case-facts dd { margin: 0; color: #d7d8dc; font-size: 14px; line-height: 1.5; }
.npc-case-stack { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 30px; }
.npc-case-stack span { padding: 7px 10px; border: 1px solid #4b4d56; border-radius: 9px; color: #f5f5f2; font-size: 12px; line-height: 1; }

.npc-case-hero-media { display: grid; grid-template-rows: minmax(0,1fr) auto; min-width: 0; margin: 0; border-left: 1px solid #454750; background: #343434; }
.npc-case-hero-media a { display: grid; min-width: 0; min-height: 44px; place-items: center; }
.npc-case-hero-media img { width: 100%; height: 100%; min-height: 0; object-fit: contain; object-position: center; image-rendering: pixelated; }
.npc-case-hero-media figcaption { min-height: 40px; padding: 12px 16px; border-top: 1px solid #454750; color: #aeb0b7; font-size: 12px; line-height: 1.35; }

.npc-case-page .site-nav a,
.npc-case-page .case-breadcrumb a,
.npc-case-page .case-footer-links a,
.npc-case-page .footer-bottom a {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.npc-case-section { margin-top: 110px; }
.npc-case-section-head { display: grid; grid-template-columns: minmax(330px,.8fr) minmax(0,1.2fr); gap: 70px; align-items: end; margin-bottom: 34px; padding-bottom: 28px; border-bottom: 1px solid var(--dark); }
.npc-case-section-head > div { min-width: 0; }
.npc-case-index { display: block; margin-bottom: 16px; color: #6b6b6b; font-size: 13px; font-weight: 600; letter-spacing: .05em; }
.npc-case-section-head h2 { margin: 0; font-size: clamp(38px,4.5vw,60px); font-weight: 500; line-height: 1.05; letter-spacing: -.035em; text-wrap: balance; }
.npc-case-section-head > p { max-width: 680px; margin: 0; color: var(--text-secondary); font-size: 17px; line-height: 1.7; text-wrap: pretty; }

.npc-workscene-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.npc-workscene-item { display: grid; min-width: 0; margin: 0; overflow: hidden; border: 1px solid var(--dark); border-radius: 24px; background: var(--gray); box-shadow: 0 5px 0 var(--dark); }
.npc-workscene-item--main { grid-column: 1/-1; grid-template-columns: minmax(0,1.55fr) minmax(270px,.45fr); background: var(--dark); color: #fff; }
.npc-workscene-item a { position: relative; display: grid; min-width: 0; min-height: 44px; overflow: hidden; place-items: center; border-bottom: 1px solid var(--dark); background: #343434; }
.npc-workscene-item--main a { border-right: 1px solid #454750; border-bottom: 0; }
.npc-workscene-item a::after { content: "查看大图 ↗"; position: absolute; right: 12px; bottom: 12px; display: grid; min-height: 40px; padding: 0 12px; place-items: center; border: 1px solid var(--dark); border-radius: 9px; background: rgba(255,255,255,.94); color: var(--dark); font-size: 12px; font-weight: 600; opacity: 0; transform: translateY(5px); transition: opacity .18s ease,transform .18s ease; }
.npc-workscene-item a:hover::after,.npc-workscene-item a:focus-visible::after { opacity: 1; transform: none; }
.npc-workscene-item a:focus-visible { outline: 3px solid var(--green); outline-offset: -4px; }
.npc-workscene-item img { display: block; width: 100%; height: auto; aspect-ratio: 16/9; object-fit: contain; image-rendering: pixelated; transition: opacity .16s ease,transform .16s ease; }
.npc-workscene-item--main img { aspect-ratio: 1472/752; }
.npc-workscene-item a:active img,.npc-case-hero-media a:active img { opacity: .82; transform: scale(.995); }
.npc-workscene-caption { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; padding: 24px; }
.npc-workscene-item--main .npc-workscene-caption { justify-content: center; padding: 34px; }
.npc-workscene-kicker { color: var(--text-muted); font-size: 12px; font-weight: 650; line-height: 1.2; letter-spacing: .045em; text-transform: uppercase; }
.npc-workscene-item--main .npc-workscene-kicker { color: var(--green); }
.npc-workscene-caption strong { margin-top: 12px; font-size: 20px; font-weight: 550; line-height: 1.3; }
.npc-workscene-description { margin-top: 10px; color: var(--text-secondary); font-size: 14px; line-height: 1.55; text-wrap: pretty; }
.npc-workscene-item--main .npc-workscene-description { color: #aeb0b7; }

.npc-mechanism-section,
.npc-eval-section { margin-right: calc((100vw - min(1240px, calc(100vw - 48px))) / -2); margin-left: calc((100vw - min(1240px, calc(100vw - 48px))) / -2); padding: 76px max(24px, calc((100vw - 1240px) / 2)) 82px; background: var(--dark); color: #fff; }
.npc-case-section-head--dark { border-color: #3b3d46; }
.npc-case-section-head--dark .npc-case-index { color: var(--green); }
.npc-case-section-head--dark > p { color: #c9cad0; }

.npc-architecture { margin: 0; }
.npc-architecture-source { display: grid; grid-template-columns: auto minmax(240px,1fr) minmax(0,1.4fr); gap: 22px; align-items: center; padding: 20px 24px; border: 1px solid var(--green); border-radius: 18px; background: #202127; }
.npc-architecture-source > span { padding: 7px 10px; border-radius: 8px; background: var(--green); color: var(--dark); font-size: 12px; font-weight: 600; }
.npc-architecture-source strong { font-size: 20px; font-weight: 500; }
.npc-architecture-source p { margin: 0; color: #b8b9bf; font-size: 14px; line-height: 1.45; }
.npc-architecture-flow { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 14px; margin: 22px 0 0; padding: 0; list-style: none; }
.npc-architecture-flow li { position: relative; min-width: 0; min-height: 174px; padding: 22px 20px; border: 1px solid #454750; border-radius: 18px; background: #202127; }
.npc-architecture-flow li:not(:last-child)::after { content: "→"; position: absolute; top: 50%; right: -13px; z-index: 2; display: grid; width: 24px; height: 24px; place-items: center; border-radius: 50%; background: var(--green); color: var(--dark); font-size: 14px; font-weight: 700; transform: translateY(-50%); }
.npc-architecture-flow li > span { color: var(--green); font-size: 12px; font-weight: 600; }
.npc-architecture-flow strong { display: block; margin-top: 24px; font-size: 19px; font-weight: 500; line-height: 1.25; }
.npc-architecture-flow p { margin: 10px 0 0; color: #aaaab1; font-size: 13px; line-height: 1.5; }
.npc-architecture-rails { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; margin-top: 14px; }
.npc-architecture-rails article { min-width: 0; padding: 22px; border: 1px solid #454750; border-radius: 18px; background: #15161c; }
.npc-architecture-rails span { color: var(--green); font-size: 12px; font-weight: 600; letter-spacing: .06em; }
.npc-architecture-rails strong { display: block; margin-top: 13px; font-size: 17px; font-weight: 500; }
.npc-architecture-rails p { margin: 9px 0 0; color: #aaaab1; font-size: 13px; line-height: 1.55; }
.npc-architecture figcaption { margin-top: 18px; color: #8e9098; font-size: 12px; line-height: 1.5; }

.npc-persona-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.npc-persona-card { padding: 36px; border: 1px solid var(--dark); border-radius: 28px; background: var(--gray); box-shadow: 0 5px 0 var(--dark); }
.npc-persona-card--k { background: var(--green); }
.npc-persona-card header { display: flex; align-items: center; gap: 20px; }
.npc-persona-card header img { width: 76px; height: 76px; border: 1px solid var(--dark); border-radius: 18px; background: #fff; image-rendering: pixelated; }
.npc-persona-card header span { color: var(--text-muted); font-size: 12px; font-weight: 600; letter-spacing: .06em; }
.npc-persona-card header h3 { margin: 5px 0 2px; font-size: 30px; font-weight: 500; line-height: 1.1; }
.npc-persona-card header p { margin: 0; color: var(--text-secondary); font-size: 14px; }
.npc-persona-rule { display: grid; grid-template-columns: 72px minmax(0,1fr); gap: 16px; margin-top: 28px; padding: 18px 0; border-top: 1px solid rgba(25,26,35,.3); border-bottom: 1px solid rgba(25,26,35,.3); }
.npc-persona-rule strong,.npc-persona-rule span { font-size: 14px; line-height: 1.5; }
.npc-persona-rule strong { font-weight: 600; }
.npc-persona-rule span { color: var(--text-secondary); }
.npc-persona-card blockquote { margin: 28px 0 0; }
.npc-persona-card blockquote p { margin: 0; font-size: 20px; line-height: 1.6; text-wrap: pretty; }
.npc-persona-card blockquote footer { margin-top: 18px; color: var(--text-muted); font-size: 12px; line-height: 1.45; }

.npc-eval-metrics { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); overflow: hidden; border: 1px solid #454750; border-radius: 22px; background: #202127; }
.npc-eval-metrics div { min-width: 0; padding: 28px; border-right: 1px solid #454750; }
.npc-eval-metrics div:last-child { border-right: 0; }
.npc-eval-metrics strong { display: block; color: var(--green); font-size: 50px; font-weight: 500; line-height: 1; letter-spacing: -.04em; }
.npc-eval-metrics span { display: block; margin-top: 10px; color: #d8d8dc; font-size: 13px; line-height: 1.4; }
.npc-eval-flow { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 14px; margin: 22px 0 0; padding: 0; list-style: none; }
.npc-eval-flow li { min-width: 0; min-height: 154px; padding: 20px; border: 1px solid #454750; border-radius: 18px; background: #15161c; }
.npc-eval-flow span { color: var(--green); font-size: 12px; font-weight: 600; }
.npc-eval-flow strong { display: block; margin-top: 18px; font-size: 17px; font-weight: 500; }
.npc-eval-flow p { margin: 8px 0 0; color: #aeb0b7; font-size: 13px; line-height: 1.5; }
.npc-eval-case { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: 56px; margin-top: 22px; padding: 34px; border: 1px solid var(--green); border-radius: 22px; background: #202127; }
.npc-eval-case > div > span { color: var(--green); font-size: 12px; font-weight: 600; letter-spacing: .05em; }
.npc-eval-case h3 { margin: 14px 0 12px; font-size: 27px; font-weight: 500; line-height: 1.2; }
.npc-eval-case > div > p { margin: 0; color: #bfc0c5; font-size: 15px; line-height: 1.65; }
.npc-eval-case blockquote { margin: 0; padding-left: 30px; border-left: 1px solid #454750; }
.npc-eval-case blockquote p { margin: 0; color: #f5f5f2; font-size: 20px; line-height: 1.6; text-wrap: pretty; }
.npc-eval-case blockquote footer { margin-top: 16px; color: #9c9ea6; font-size: 12px; line-height: 1.5; }

.npc-case-bottom-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; margin-top: 42px; }
.npc-case-footer { margin-top: 100px; }
.npc-case-footer .footer-top { align-items: center; }
.npc-case-footer .logo-main { transform: none; }
.npc-case-footer .case-footer-links { display: flex; flex-wrap: wrap; gap: 24px; font-size: 16px; }
.npc-case-float-back { display: none; }
.npc-case-float-back[hidden] { display: none; }

@media (max-width: 1040px) {
  .npc-case-hero { grid-template-columns: minmax(0,1fr); }
  .npc-case-hero-media { order: -1; border-bottom: 1px solid #454750; border-left: 0; }
  .npc-case-hero-media img { min-height: 0; aspect-ratio: 1472/752; }
  .npc-case-stack { margin-top: 28px; }
  .npc-case-section-head { grid-template-columns: minmax(0,1fr); gap: 24px; align-items: start; }
  .npc-workscene-item--main { grid-template-columns: minmax(0,1fr); }
  .npc-workscene-item--main a { border-right: 0; border-bottom: 1px solid #454750; }
  .npc-workscene-item--main .npc-workscene-caption { padding: 28px; }
  .npc-architecture-flow { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .npc-architecture-flow li:nth-child(3)::after { display: none; }
  .npc-eval-flow { grid-template-columns: repeat(3,minmax(0,1fr)); }
}

@media (max-width: 720px) {
  .npc-case-page .mobile-back-link {
    position: static;
    top: auto;
    width: max-content;
    min-width: 48px;
    height: auto;
    min-height: 48px;
    margin: 0 0 22px;
    padding: 10px 16px;
    border-radius: 14px;
  }
  .npc-case-page .mobile-back-link span { position: static; width: auto; height: auto; overflow: visible; clip-path: none; white-space: normal; }
  .npc-case-float-back { position: fixed; right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); z-index: 20; width: 52px; height: 52px; place-items: center; border: 1px solid var(--dark); border-radius: 50%; background: #fff; color: var(--dark); box-shadow: 0 4px 0 var(--dark); font-size: 19px; font-weight: 600; }
  .npc-case-float-back:not([hidden]) { display: grid; }
  .npc-case-float-back:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--dark); }
  .npc-case-float-back:focus-visible { outline: 3px solid var(--green); outline-offset: 4px; }
  .npc-case-hero { margin-top: 4px; border-radius: 26px; }
  .npc-case-hero-copy { order: -1; padding: 30px 24px 34px; }
  .npc-case-hero-media { order: 0; border-top: 1px solid #454750; border-bottom: 0; }
  .npc-case-hero h1 { margin-top: 28px; font-size: 52px; }
  .npc-case-hero-copy > p { font-size: 17px; }
  .npc-case-section { margin-top: 84px; }
  .npc-case-section-head { margin-bottom: 28px; padding-bottom: 24px; }
  .npc-case-section-head h2 { font-size: 39px; }
  .npc-case-section-head > p { font-size: 17px; }
  .npc-workscene-grid,.npc-persona-grid { grid-template-columns: minmax(0,1fr); }
  .npc-workscene-item--main { grid-column: auto; }
  .npc-workscene-caption,.npc-workscene-item--main .npc-workscene-caption { padding: 22px; }
  .npc-workscene-caption strong { font-size: 18px; }
  .npc-workscene-description { font-size: 15px; }
  .npc-mechanism-section,.npc-eval-section { margin-right: -16px; margin-left: -16px; padding: 62px 24px 68px; }
  .npc-architecture-source { grid-template-columns: minmax(0,1fr); gap: 10px; }
  .npc-architecture-source > span { width: max-content; }
  .npc-architecture-flow,.npc-architecture-rails,.npc-eval-flow { grid-template-columns: minmax(0,1fr); }
  .npc-architecture-flow li { min-height: 0; }
  .npc-architecture-flow p,.npc-architecture-rails p,.npc-eval-flow p { font-size: 14px; }
  .npc-architecture-flow li:not(:last-child)::after { content: "↓"; top: auto; right: 50%; bottom: -18px; display: grid; transform: translateX(50%); }
  .npc-eval-metrics { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .npc-eval-metrics div:nth-child(2) { border-right: 0; }
  .npc-eval-metrics div:nth-child(-n+2) { border-bottom: 1px solid #454750; }
  .npc-eval-metrics strong { font-size: 42px; }
  .npc-eval-case { grid-template-columns: minmax(0,1fr); gap: 28px; padding: 26px 22px; }
  .npc-eval-case blockquote { padding-top: 26px; padding-left: 0; border-top: 1px solid #454750; border-left: 0; }
  .npc-persona-card { padding: 26px 22px; border-radius: 24px; }
  .npc-persona-card blockquote p,.npc-eval-case blockquote p { font-size: 18px; }
  .npc-case-footer { margin-top: 84px; }
}

@media (hover: none) and (pointer: coarse) {
  .npc-workscene-item a::after { min-height: 44px; opacity: 1; transform: none; }
}

@media (max-width: 380px) {
  .npc-case-hero h1 { font-size: 45px; }
  .npc-case-facts div { grid-template-columns: minmax(0,1fr); gap: 4px; }
  .npc-case-section-head h2 { font-size: 34px; }
  .npc-persona-card header { align-items: flex-start; }
  .npc-persona-card header img { width: 64px; height: 64px; border-radius: 15px; }
  .npc-persona-rule { grid-template-columns: minmax(0,1fr); gap: 6px; }
  .npc-eval-metrics { grid-template-columns: minmax(0,1fr); }
  .npc-eval-metrics div,.npc-eval-metrics div:nth-child(2) { border-right: 0; border-bottom: 1px solid #454750; }
  .npc-eval-metrics div:last-child { border-bottom: 0; }
}