.page-about {
  --about-cut: 12px;
  --about-side-w: clamp(200px, 24vw, 300px);
  --about-gap: clamp(22px, 3.6vw, 56px);
  display: block;
  padding-top: clamp(22px, 4vw, 46px);
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ---------- 报头 ---------- */
.page-about .about-masthead {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  padding: clamp(20px, 4vw, 46px) 0 clamp(34px, 5vw, 72px);
  position: relative;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--hth-red) 0, var(--hth-red) 42px, var(--hth-line) 42px, transparent 100%);
}

.page-about .about-masthead__main .hth-lead {
  margin-top: 18px;
  max-width: 34ch;
  color: var(--hth-mist);
  opacity: .92;
}

.page-about .about-imprint {
  margin: 0;
  border-top: 1px solid var(--hth-line-strong);
}

.page-about .about-imprint__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hth-line);
}

.page-about .about-imprint dt {
  font-family: var(--hth-numeric);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--hth-gray);
  white-space: nowrap;
}

.page-about .about-imprint dd {
  margin: 0;
  font-family: var(--hth-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--hth-chalk);
  text-align: right;
}

.page-about .about-imprint__num {
  font-size: 24px;
  color: var(--hth-cyan);
  line-height: 1;
}

.page-about .about-imprint__unit {
  font-family: var(--hth-body);
  font-size: 11px;
  color: var(--hth-gray);
  margin-left: 3px;
}

@media (min-width: 900px) {
  .page-about .about-masthead {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-entry {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  padding: clamp(36px, 6vw, 84px) 0;
}

.page-about .about-entry::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0, var(--hth-line-strong) 14%, var(--hth-line) 62%, transparent 100%);
}

.page-about .about-entry:last-of-type::after {
  background: linear-gradient(90deg, transparent 0, var(--hth-line) 30%, transparent 100%);
}

.page-about .about-entry__side {
  align-self: start;
}

.page-about .about-entry__label {
  position: relative;
  margin: 0 0 10px;
  padding-left: 22px;
  font-family: var(--hth-numeric);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--hth-red);
}

.page-about .about-entry__label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 13px;
  height: 3px;
  background: var(--hth-red);
  transform: translateY(-50%) skewX(-12deg);
}

.page-about .about-entry__meta {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hth-gray);
  max-width: 26ch;
}

.page-about .about-entry__hint {
  margin: 0 0 20px;
  padding-left: 12px;
  border-left: 1px solid var(--hth-line-strong);
  font-size: 13px;
  line-height: 1.7;
  color: var(--hth-gray);
}

.page-about .about-entry__body {
  min-width: 0;
}

.page-about .about-entry__body .hth-h2 {
  margin-bottom: 18px;
}

.page-about .about-entry__body > p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--hth-mist);
}

.page-about .about-entry__body > p:last-child {
  margin-bottom: 0;
}

.page-about .hth-link {
  color: var(--hth-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--hth-dur) var(--hth-ease);
}

.page-about .hth-link:hover,
.page-about .hth-link:focus-visible {
  color: var(--hth-red);
}

@media (min-width: 900px) {
  .page-about .about-entry {
    grid-template-columns: var(--about-side-w) minmax(0, 1fr);
  }

  .page-about .about-entry__side {
    position: sticky;
    top: 108px;
  }

  .page-about .about-entry--flip {
    grid-template-columns: minmax(0, 1fr) var(--about-side-w);
  }

  .page-about .about-entry--flip .about-entry__side {
    order: 2;
  }
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure__frame {
  position: relative;
  overflow: hidden;
  background: var(--hth-slate);
  border: 1px solid var(--hth-line-strong);
  clip-path: polygon(var(--about-cut) 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%, 0 var(--about-cut));
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.8) contrast(1.06);
  transition: transform var(--hth-dur) var(--hth-ease);
}

.page-about .about-figure:hover .about-figure__img {
  transform: scale(1.015);
}

.page-about .about-figure--wide .about-figure__img {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hth-gray);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
  margin-top: 26px;
}

.page-about .about-crews {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-content: start;
}

.page-about .about-crew {
  position: relative;
  padding: 16px 18px;
  background: var(--hth-slate-soft);
  border: 1px solid rgba(22, 224, 212, .26);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background var(--hth-dur) var(--hth-ease), border-color var(--hth-dur) var(--hth-ease);
}

.page-about .about-crew:hover {
  border-color: rgba(22, 224, 212, .44);
}

.page-about .about-crew[open] {
  background: rgba(22, 35, 58, .82);
  border-color: rgba(22, 224, 212, .52);
}

.page-about .about-crew__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  outline: none;
}

.page-about .about-crew__head::-webkit-details-marker {
  display: none;
}

.page-about .about-crew__head:focus-visible {
  outline: 2px solid var(--hth-cyan);
  outline-offset: 4px;
}

.page-about .about-crew__role {
  font-family: var(--hth-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.2;
  color: var(--hth-chalk);
}

.page-about .about-crew__count {
  flex: 0 0 auto;
  font-size: 22px;
  line-height: 1;
  color: var(--hth-cyan);
}

.page-about .about-crew__unit {
  margin-left: 3px;
  font-family: var(--hth-body);
  font-size: 11px;
  color: var(--hth-gray);
}

.page-about .about-crew__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--hth-line);
}

.page-about .about-crew__duty {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--hth-mist);
}

.page-about .about-crew__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew__list li {
  position: relative;
  padding-left: 15px;
  font-family: var(--hth-numeric);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--hth-gray);
}

.page-about .about-crew__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .86em;
  width: 7px;
  height: 1px;
  background: var(--hth-cyan);
}

@media (min-width: 680px) {
  .page-about .about-crews {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 版本标签页 ---------- */
.page-about .about-manual {
  margin: 26px 0 22px;
}

.page-about .about-manual__tabs {
  display: flex;
  align-items: stretch;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--hth-line-strong);
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-manual__tabs .hth-tab {
  position: relative;
  flex: 0 0 auto;
  padding: 14px 18px;
  background: none;
  border: 0;
  font-family: var(--hth-numeric);
  font-size: 12.5px;
  letter-spacing: .08em;
  white-space: nowrap;
  color: var(--hth-gray);
  cursor: pointer;
  scroll-snap-align: start;
  transition: color var(--hth-dur) var(--hth-ease);
}

.page-about .about-manual__tabs .hth-tab::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: -1px;
  height: 2px;
  background: transparent;
  transition: background var(--hth-dur) var(--hth-ease);
}

.page-about .about-manual__tabs .hth-tab:hover {
  color: var(--hth-chalk);
}

.page-about .about-manual__tabs .hth-tab[aria-selected="true"] {
  color: var(--hth-chalk);
}

.page-about .about-manual__tabs .hth-tab[aria-selected="true"]::after {
  background: var(--hth-red);
}

.page-about .about-manual__tabs .hth-tab:focus-visible {
  outline: 2px solid var(--hth-cyan);
  outline-offset: -2px;
}

.page-about .about-manual__panel {
  padding-top: clamp(16px, 2.4vw, 28px);
}

.page-about .about-manual__panel[hidden] {
  display: none;
}

.page-about .about-defs {
  margin: 0;
}

.page-about .about-defs__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid var(--hth-line);
}

.page-about .about-defs__row:last-child {
  border-bottom: 1px solid var(--hth-line);
}

.page-about .about-defs dt {
  font-family: var(--hth-numeric);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--hth-cyan);
}

.page-about .about-defs dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--hth-mist);
  max-width: 62ch;
}

@media (min-width: 760px) {
  .page-about .about-defs__row {
    grid-template-columns: minmax(130px, 180px) minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  margin: 26px 0 22px;
  padding: 0 0 0 clamp(18px, 2.6vw, 30px);
  list-style: none;
  border-left: 1px solid var(--hth-line-strong);
}

.page-about .about-cadence__item {
  position: relative;
  padding-bottom: clamp(24px, 3.4vw, 38px);
}

.page-about .about-cadence__item:last-child {
  padding-bottom: 0;
}

.page-about .about-cadence__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 2.6vw, 30px) - 4px);
  top: 6px;
  width: 7px;
  height: 7px;
  background: var(--hth-amber);
  transform: rotate(45deg);
}

.page-about .about-cadence__when {
  display: block;
  margin-bottom: 6px;
  font-family: var(--hth-numeric);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--hth-amber);
}

.page-about .about-cadence__what {
  margin: 0 0 5px;
  font-family: var(--hth-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--hth-chalk);
}

.page-about .about-cadence__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hth-gray);
}

/* ---------- 赛季归属 ---------- */
.page-about .about-seasons {
  margin: 26px 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hth-line);
  border: 1px solid var(--hth-line);
}

.page-about .about-seasons__item {
  padding: 20px 18px;
  background: var(--hth-night);
}

.page-about .about-seasons__code {
  margin: 0 0 10px;
  font-family: var(--hth-numeric);
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--hth-amber);
}

.page-about .about-seasons__span {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--hth-gray);
}

@media (min-width: 760px) {
  .page-about .about-seasons {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 内容边界 ---------- */
.page-about .about-limits {
  margin: 26px 0 24px;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--hth-line);
}

.page-about .about-limits__item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 14px;
  padding: 17px 0;
  border-top: 1px solid var(--hth-line);
}

.page-about .about-limits__mark {
  width: 11px;
  height: 11px;
  margin-top: 6px;
  border: 1px solid var(--hth-red);
  transform: rotate(45deg);
}

.page-about .about-limits__text {
  min-width: 0;
}

.page-about .about-limits__t {
  margin: 0 0 5px;
  font-family: var(--hth-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--hth-chalk);
}

.page-about .about-limits__d {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--hth-gray);
}

/* ---------- 注释 ---------- */
.page-about .hth-note {
  margin: 22px 0 0;
  max-width: 70ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--hth-gray);
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 480px) {
  .page-about {
    --about-cut: 9px;
  }

  .page-about .about-imprint__row {
    flex-wrap: wrap;
    gap: 4px;
  }

  .page-about .about-imprint dd {
    text-align: left;
  }

  .page-about .about-crew__head {
    flex-wrap: wrap;
  }

  .page-about .about-manual__tabs .hth-tab {
    padding: 13px 14px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-figure__img,
  .page-about .about-crew,
  .page-about .hth-link,
  .page-about .about-manual__tabs .hth-tab {
    transition: none;
  }

  .page-about .about-figure:hover .about-figure__img {
    transform: none;
  }
}