/* ==================================================================
   Case-study page pattern (reference: asset.html)
   Load after detailpage.css. Everything is opt-in by class, so a page
   only changes once it is moved onto the pattern.
   ================================================================== */

/* ------------------------------------------------------------------
   1. Hero  —  <div class="page-title-box case-hero">
   Title, role line, stage strip, spec sheet, optional backstory on the
   left; a bottom-aligned device image on the right that sits on the
   hero's bottom edge.
   ------------------------------------------------------------------ */

.page-title-box.case-hero {
  padding: 64px 40px 0;
  border-bottom: 0;
  overflow: hidden;
}
.case-hero .grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0;
  align-items: end;
}
.case-hero .page-title-content {
  justify-self: start;
  align-self: end;
  width: 100%;
  max-width: 520px;
  margin-left: var(--space-5);
  padding-bottom: 40px;
  box-sizing: border-box;
}
.case-hero .page-title-content h2 {
  font-family: var(--font-title);
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 0;
}

/* Role line: bold title · plain responsibilities */
.case-hero .as-role { margin: 12px 0 0; font-size: 15px; line-height: 1.45; color: var(--text-secondary); }
.case-hero .as-role strong { color: var(--text-primary); font-weight: 600; }
.case-hero .as-role__rest { white-space: nowrap; }

/* Stage strip: one surface read left to right as time; .is-turn marks
   the stage the case is about. 3–4 stages. */
.case-hero .as-stats {
  display: grid;
  grid-template-columns: repeat(var(--stats-n, 4), minmax(0, 1fr));
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  max-width: 520px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.case-hero .as-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  margin: 0;
  padding: 16px 16px 14px;
  background: transparent;
  border-right: 1px solid var(--border);
}
.case-hero .as-stats li:last-child { border-right: 0; }
.case-hero .as-stats li.is-turn { background: rgba(0, 52, 240, 0.05); }
.case-hero .as-stats__num {
  font-family: var(--font-title);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text-primary);
}
.case-hero .as-stats li.is-turn .as-stats__num { color: var(--accent); }
.case-hero .as-stats__label {
  font-size: 12px;
  line-height: 1.25;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Spec sheet: label column + value, one row per <div> */
.case-hero .as-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  max-width: 520px;
  border-top: 0;
}
.case-hero .as-meta > div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  column-gap: 12px;
  align-items: baseline;
  min-width: 0;
}
.case-hero .as-meta dt,
.case-hero .as-meta dd { margin: 0; padding: 0; }
.case-hero .as-meta dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.case-hero .as-meta dd { font-size: 14px; line-height: 1.45; color: var(--text-primary); }

/* Optional backstory disclosure */
.case-hero .as-hero-more {
  margin: 20px 0 0;
  max-width: 520px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-secondary);
}
.case-hero .as-hero-more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
}
.case-hero .as-hero-more summary:hover { text-decoration: underline; text-underline-offset: 3px; }
.case-hero .as-hero-more summary::-webkit-details-marker { display: none; }
.case-hero .as-hero-more summary::before {
  content: "";
  width: 5px;
  height: 5px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  margin-top: -1px;
  flex: none;
}
.case-hero .as-hero-more[open] summary::before { transform: rotate(45deg); margin-top: 2px; }
.case-hero .as-hero-more summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.case-hero .as-hero-more p {
  margin: 10px 0 0;
  padding: 0 0 0 12px;
  border-left: 2px solid var(--border-strong);
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* Hero image: transparent PNG, devices standing on the bottom edge */
.case-hero .title-img {
  display: flex;
  justify-content: center;
  align-self: end;
  position: relative;
  line-height: 0;
  width: 100%;
  height: auto;
  max-height: none;
  margin: 0 0 -1px;
}
.case-hero .title-img img,
.case-hero .title-img video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 360px;
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  object-fit: contain;
  object-position: center center;
}

/* Chinese: CJK needs more leading and no negative tracking */
html[data-lang="zh"] .case-hero .page-title-content h2 { letter-spacing: -0.01em; line-height: 1.35; }
html[data-lang="zh"] .case-hero .as-meta dt { font-size: 12px; letter-spacing: 0.06em; }

/* Bleed variant: the image sits --hero-top below the title's top edge, fills the column width,
   and runs past the hero's bottom edge, where .page-title-box clips it */
@media (min-width: 1101px) {
  .case-hero--fill .grid { grid-template-columns: calc(520px + var(--space-5)) minmax(0, 1fr); align-items: stretch; column-gap: 0; }
  .case-hero--fill .title-img { align-self: stretch; }
  .case-hero--fill .page-title-content { padding-bottom: 96px; }
  /* --hero-img-pad: the image's transparent shadow padding on each side, as a fraction of its width.
     The visible screens then start --hero-gap after the text and --hero-top below the title's top. */
  .case-hero--fill .title-img { --hero-gap: 64px; --hero-top: 40px; }
  .case-hero--fill .title-img img {
    --w: calc((100% - var(--hero-gap)) / (1 - 2 * var(--hero-img-pad, 0)));
    position: absolute;
    top: var(--hero-top);
    left: calc(var(--hero-gap) - var(--w) * var(--hero-img-pad, 0));
    width: var(--w);
    max-width: none;
    height: auto;
    max-height: none;
    margin-top: calc(var(--w) * var(--hero-img-pad, 0) * -1);
  }
}

@media (max-width: 1100px) {
  .case-hero .grid {
    max-width: var(--container-narrow);
    grid-template-columns: 1fr;
    gap: var(--space-3);
    align-items: center;
    justify-items: start;
  }
  .case-hero .page-title-content { grid-column: 1 / -1; justify-self: start; margin-left: var(--space-5); }
  .case-hero .title-img { grid-column: 1 / -1; justify-content: center; width: 100%; margin: 0 0 -1px; }
  .case-hero .title-img img,
  .case-hero .title-img video { max-height: 260px; object-position: center bottom; }
  .case-hero--fill .title-img img { max-height: 420px; }
}
@media (max-width: 720px) {
  .page-title-box.case-hero { padding-left: 16px; padding-right: 16px; }
  .case-hero .page-title-content { margin-left: 0; margin-right: 0; }
  .case-hero .page-title-content h2 { font-size: 24px; }
  .case-hero .as-role { font-size: 13.5px; }
  .case-hero .as-stats__num { font-size: 17px; }
  .case-hero .as-meta dd { font-size: 13px; }
}
@media (max-width: 560px) {
  .case-hero .as-stats { grid-template-columns: 1fr 1fr; }
  .case-hero .as-stats li { border-right: 0; border-bottom: 1px solid var(--border); }
  .case-hero .as-stats li:nth-child(odd) { border-right: 1px solid var(--border); }
  .case-hero .as-stats li:nth-last-child(-n+2) { border-bottom: 0; }
  .case-hero .as-meta > div { grid-template-columns: 92px minmax(0, 1fr); }
}
@media (pointer: coarse) {
  .case-hero .as-hero-more summary { padding-block: 10px; margin-block: -10px; }
}