/* =========================================================
   WHAT WE DO — editorial capability index
   ========================================================= */

.capabilities-editorial {
  --cap-paper: #f5f4f1;
  --cap-ink: #141311;
  --cap-mute: rgba(20, 19, 17, 0.42);
  --cap-line: rgba(20, 19, 17, 0.14);
  --cap-ease: cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  min-height: 100svh;
  background: var(--cap-paper);
  color: var(--cap-ink);
  overflow: hidden;
}

.cap-shell {
  width: min(1320px, calc(100% - 2 * clamp(1.25rem, 4vw, 3.5rem)));
  margin: 0 auto;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 0.4fr) minmax(0, 0.6fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  padding: clamp(4.5rem, 10vh, 7rem) 0 clamp(3.5rem, 8vh, 5.5rem);
  align-items: stretch;
}

.cap-rail {
  position: sticky;
  top: clamp(5rem, 12vh, 7rem);
  align-self: start;
  max-width: 28rem;
}

.cap-kicker {
  margin: 0 0 1.1rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-title {
  margin: 0;
  font-size: clamp(1.85rem, 2.8vw, 2.75rem);
  font-weight: 560;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--cap-ink);
}

.cap-en {
  margin: 1rem 0 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-index {
  list-style: none;
  margin: clamp(2.5rem, 5vh, 3.5rem) 0 0;
  padding: 0;
}

.cap-index > li {
  margin: 0;
  padding: 0;
}

.cap-item {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  grid-template-areas:
    "num method"
    ". label"
    "line line";
  column-gap: 0.85rem;
  width: 100%;
  margin: 0;
  padding: 1.15rem 0 0;
  border: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  color: inherit;
  opacity: 0.42;
  transition: opacity 650ms var(--cap-ease);
}

.cap-item.is-active,
.cap-item:hover {
  opacity: 1;
}

.cap-item__num {
  grid-area: num;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cap-mute);
  padding-top: 0.45em;
}

.cap-item__method {
  grid-area: method;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: clamp(1.55rem, 2.2vw, 2.15rem);
  font-weight: 560;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1.1;
  transition: letter-spacing 650ms var(--cap-ease), font-weight 650ms var(--cap-ease);
}

.cap-item.is-active .cap-item__method {
  letter-spacing: 0.12em;
  font-weight: 620;
}

.cap-item__label {
  grid-area: label;
  margin-top: 0.45rem;
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  line-height: 1.45;
  color: rgba(20, 19, 17, 0.72);
}

.cap-item__line {
  grid-area: line;
  display: block;
  height: 1px;
  margin-top: 1.15rem;
  background: var(--cap-line);
}

.cap-stage {
  position: relative;
  min-height: min(72vh, 780px);
}

.cap-panel {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(10px) scale(0.992);
  clip-path: inset(0 0 8% 0);
  transition:
    opacity 700ms var(--cap-ease),
    transform 700ms var(--cap-ease),
    clip-path 700ms var(--cap-ease),
    visibility 0s linear 700ms;
}

.cap-panel.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
  clip-path: inset(0 0 0 0);
  transition:
    opacity 700ms var(--cap-ease),
    transform 700ms var(--cap-ease),
    clip-path 700ms var(--cap-ease),
    visibility 0s linear 0s;
}

.cap-panel__mobile-head {
  display: none;
}

.cap-panel__body {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-left: clamp(0.5rem, 2vw, 1.5rem);
}

.cap-panel__lead {
  margin: 0;
  max-width: 18em;
  font-size: clamp(1.35rem, 2vw, 1.85rem);
  font-weight: 560;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.cap-panel__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-panel__tags span {
  position: relative;
}

.cap-panel__meta {
  margin-top: auto;
  padding-top: 0.5rem;
}

.cap-panel__name {
  margin: 0;
  font-size: clamp(1.25rem, 1.8vw, 1.55rem);
  font-weight: 560;
  letter-spacing: -0.01em;
}

.cap-panel__desc {
  margin: 0.65rem 0 0;
  max-width: 28em;
  font-size: clamp(0.98rem, 1.15vw, 1.08rem);
  line-height: 1.55;
  color: rgba(20, 19, 17, 0.72);
}

.cap-panel__note {
  margin: 0.55rem 0 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1.25rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--cap-ink);
  border-bottom: 1px solid currentColor;
  padding-bottom: 0.12rem;
  width: fit-content;
  transition: opacity 500ms var(--cap-ease), letter-spacing 500ms var(--cap-ease);
}

.cap-cta:hover {
  opacity: 0.7;
  letter-spacing: 0.22em;
}

/* ——— GEO editorial research ——— */
.cap-geo {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
  padding: 1.25rem 0;
}

.cap-geo__badge {
  margin: 0 0 1.25rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-geo__flow {
  display: grid;
  gap: 0.55rem;
  max-width: 34rem;
}

.cap-geo__step {
  padding: 0.95rem 0;
  border-top: 1px solid var(--cap-line);
}

.cap-geo__step:last-child {
  border-bottom: 1px solid var(--cap-line);
}

.cap-geo__k {
  display: block;
  margin-bottom: 0.45rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-geo__step p {
  margin: 0;
  font-size: clamp(0.98rem, 1.15vw, 1.08rem);
  line-height: 1.55;
  color: rgba(20, 19, 17, 0.86);
}

.cap-geo__arrow {
  display: block;
  font-size: 0.85rem;
  color: var(--cap-mute);
  padding-left: 0.1rem;
}

.cap-geo__marks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin: 0.85rem 0 0;
  padding: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

/* ——— Visual stages (single frame, no floating collage) ——— */
.cap-visual {
  position: relative;
  flex: 1;
  min-height: 0;
  margin: 0.25rem 0 0.5rem;
}

.cap-visual__frame {
  margin: 0;
  width: 100%;
  background: #ebeae6;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.cap-visual__main {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(0.08) contrast(1.02);
}

.cap-visual__float {
  display: none !important;
}

.cap-flowline {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0;
  margin: 1rem 0 0;
  padding: 0;
  max-width: 100%;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

.cap-flowline li {
  display: inline-flex;
  align-items: center;
}

.cap-flowline li:not(:last-child)::after {
  content: "→";
  margin: 0 0.55rem;
  opacity: 0.55;
}

.cap-visual--brand {
  display: flex;
  align-items: center;
}

.cap-brand-board {
  width: 100%;
  max-width: 34rem;
  padding: clamp(1.75rem, 3vw, 2.75rem) 0;
  border-top: 1px solid var(--cap-line);
  border-bottom: 1px solid var(--cap-line);
}

.cap-brand-board__mark {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.cap-brand-board__en {
  margin: 0.35rem 0 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: lowercase;
  color: var(--cap-mute);
}

.cap-brand-board__line {
  margin: 2rem 0 0;
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.cap-brand-board__line--zh {
  margin-top: 0.65rem;
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  font-weight: 400;
  color: rgba(20, 19, 17, 0.72);
}

.cap-brand-board__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.1rem;
  margin-top: 2rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cap-mute);
}

/* Selected Work quiet head (legacy — unused after minimal rebuild) */
.cd-selected__head { display: none; }

/* ——— Mobile accordion ——— */
@media (max-width: 768px) {
  .capabilities-editorial {
    min-height: 0;
  }

  .cap-shell {
    display: block;
    min-height: 0;
    padding: clamp(3.5rem, 10vh, 5rem) 0 2.5rem;
  }

  .cap-rail {
    position: static;
    max-width: none;
  }

  .cap-title {
    font-size: clamp(1.7rem, 7vw, 2.2rem);
  }

  .cap-index {
    display: none;
  }

  .cap-stage {
    position: static;
    min-height: 0;
    margin-top: 2rem;
  }

  .cap-panel {
    position: static;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    clip-path: none;
    transition: none;
    border-top: 1px solid var(--cap-line);
  }

  .cap-panel[hidden] {
    display: block !important;
  }

  .cap-panel:not(.is-open):not(.is-active) .cap-panel__body {
    grid-template-rows: 0fr;
    opacity: 0;
    padding-bottom: 0;
  }

  .cap-panel__mobile-head {
    display: grid;
    grid-template-columns: 2.2rem 1fr;
    grid-template-areas:
      "num method"
      ". label";
    column-gap: 0.75rem;
    width: 100%;
    padding: 1.15rem 0;
    cursor: pointer;
    background: none;
    border: 0;
    text-align: left;
    color: inherit;
    opacity: 0.45;
  }

  .cap-panel.is-open .cap-panel__mobile-head,
  .cap-panel.is-active .cap-panel__mobile-head {
    opacity: 1;
  }

  .cap-panel__mobile-head .cap-item__num { grid-area: num; padding-top: 0.4em; }
  .cap-panel__mobile-head .cap-item__method {
    grid-area: method;
    font-size: clamp(1.45rem, 6.5vw, 1.85rem);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 600;
  }
  .cap-panel__mobile-head .cap-item__label {
    grid-area: label;
    margin-top: 0.35rem;
    font-size: 0.98rem;
  }

  .cap-panel__body {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    padding: 0;
    overflow: hidden;
    transition: opacity 550ms var(--cap-ease), grid-template-rows 650ms var(--cap-ease);
  }

  .cap-panel.is-open .cap-panel__body,
  .cap-panel.is-active .cap-panel__body {
    grid-template-rows: 1fr;
    opacity: 1;
    padding-bottom: 1.75rem;
  }

  .cap-panel__body > * {
    min-height: 0;
    overflow: hidden;
  }

  /* unwrap for open state content */
  .cap-panel.is-open .cap-panel__body > *,
  .cap-panel.is-active .cap-panel__body > * {
    overflow: visible;
  }

  .cap-panel__lead {
    font-size: clamp(1.25rem, 5.5vw, 1.55rem);
    max-width: none;
  }

  .cap-geo__step p,
  .cap-panel__desc {
    font-size: 1rem;
  }

  .cap-geo__flow {
    max-width: none;
  }

  .cap-geo__step--entity,
  .cap-geo__step--entity + .cap-geo__arrow {
    display: none;
  }

  /* collapse: Answer → Citation with one arrow remaining before citation */
  .cap-geo__step--ans + .cap-geo__arrow {
    display: block;
  }

  .cap-visual__float {
    display: none;
  }

  .cap-visual__frame {
    aspect-ratio: 16 / 11;
  }

  .cap-flowline {
    max-width: 100%;
    font-size: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cap-panel,
  .cap-item,
  .cap-panel__body {
    transition: none !important;
  }
}