.page-about {
  --about-axis-w: 248px;
  --about-hair: rgba(15, 43, 36, .14);
}

.page-about .about-hero {
  padding-top: clamp(22px, 3vw, 38px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: -.5px;
  color: var(--ink);
  margin: 12px 0 0;
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-2);
  max-width: 58ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-stat {
  background: var(--ivory);
  padding: 14px 16px 16px;
  margin: 0;
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(19px, 2.6vw, 24px);
  color: var(--green);
  letter-spacing: -.02em;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
  margin-bottom: 6px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--green-line);
  background: var(--green);
  box-shadow: var(--sh-card);
}

.page-about .about-hero__media .media__caption {
  padding: 12px 16px 14px;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ivory-2);
  border-top: 1px solid var(--green-line);
}

.page-about .about-hero__notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.page-about .about-note {
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--gold);
  background: var(--ivory-2);
  padding: 14px 16px;
}

.page-about .about-note__label {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-lo);
}

.page-about .about-note__value {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* 沿革脉络 */
.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-axis {
  background: var(--green);
  border: 1px solid var(--green-line);
  padding: 18px 18px 20px;
}

.page-about .about-axis__caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

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

.page-about .about-axis__item + .about-axis__item {
  border-top: 1px solid var(--green-2);
}

.page-about .about-axis__link {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: center;
  padding: 12px 2px;
  text-decoration: none;
  color: var(--ivory);
}

.page-about .about-axis__link:hover,
.page-about .about-axis__link:focus-visible {
  color: var(--gold-hi);
}

.page-about .about-axis__dot {
  grid-row: 1 / span 2;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(198, 161, 91, .16);
}

.page-about .about-axis__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-axis__text {
  font-size: 15px;
  line-height: 1.6;
}

.page-about .about-phase {
  position: relative;
  background: var(--ivory);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--gold);
  box-shadow: var(--sh-card);
  padding: 20px clamp(16px, 2.6vw, 30px) 22px;
}

.page-about .about-phase + .about-phase {
  margin-top: 18px;
}

.page-about .about-phase__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-lo);
}

.page-about .about-phase__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.5vw, 24px);
  line-height: 1.4;
  color: var(--green);
}

.page-about .about-phase__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

.page-about .about-phase__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* 内容线 */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  background: var(--ivory);
  border: 1px solid var(--about-hair);
  box-shadow: var(--sh-card);
  padding: 20px;
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-line:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .about-line__no {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 30px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-line__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.3vw, 22px);
  line-height: 1.45;
  color: var(--green);
}

.page-about .about-line__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

.page-about .about-line__side {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-about .about-line__link {
  font-size: 14px;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}

.page-about .about-line__link:hover,
.page-about .about-line__link:focus-visible {
  color: var(--gold-lo);
}

.page-about .about-band {
  margin: 30px 0 0;
  border: 1px solid var(--about-hair);
  background: var(--ivory-2);
}

.page-about .about-band .media__caption {
  margin: 0;
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
  border-top: 1px solid var(--about-hair);
}

.page-about .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 近期更新 */
.page-about .about-updates {
  margin-top: 26px;
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--green);
  background: var(--ivory);
  padding: clamp(18px, 2.6vw, 28px);
}

.page-about .about-updates__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--green);
}

.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .tabs__tab {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  padding: 8px 14px;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--about-hair);
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .tabs__tab:hover {
  border-color: var(--gold);
  color: var(--green);
}

.page-about .tabs__tab[aria-selected="true"] {
  background: var(--green);
  border-color: var(--green);
  color: var(--ivory);
}

.page-about .tabs__panel {
  margin-top: 18px;
}

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

.page-about .about-updates__item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--ivory-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-updates__item:last-child {
  border-bottom: 0;
}

.page-about .about-updates__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-lo);
}

/* 团队 */
.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-crew__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--ivory);
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--green-2);
  box-shadow: var(--sh-card);
  padding: 20px;
}

.page-about .about-crew__icon {
  color: var(--gold);
  line-height: 0;
}

.page-about .about-crew__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  color: var(--green);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-2);
}

.page-about .about-crew__cadence-label {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-2);
}

.page-about .about-crew__cadence {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.page-about .about-crew__slot {
  flex: 1;
  height: 5px;
  background: var(--ivory-2);
  border: 1px solid var(--about-hair);
}

.page-about .about-crew__slot--on {
  background: linear-gradient(90deg, var(--gold-lo), var(--gold-hi));
  border-color: var(--gold-lo);
}

/* 资质与凭据 */
.page-about .about-charter {
  margin-top: clamp(38px, 5vw, 68px);
  padding: clamp(32px, 4.6vw, 58px) 0;
  background: var(--green);
  border-top: 3px solid var(--gold);
  border-bottom: 3px solid var(--gold);
  color: var(--ivory);
}

.page-about .about-charter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .about-charter__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-charter__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.3;
  color: var(--ivory);
}

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

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--green-line);
}

.page-about .about-facts__no {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .about-facts__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-hi);
}

.page-about .about-facts__value {
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ivory);
}

.page-about .about-charter__media {
  margin: 0;
  border: 1px solid var(--green-line);
}

.page-about .about-charter__media .media__caption {
  margin: 0;
  padding: 12px 14px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ivory-2);
  border-top: 1px solid var(--green-line);
}

/* 收束入口 */
.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--gold);
  background: var(--ivory-2);
  padding: 22px clamp(18px, 2.6vw, 30px);
}

.page-about .about-next__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--green);
}

.page-about .about-next__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 700px) {
  .page-about .about-hero__notes,
  .page-about .about-crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-line {
    grid-template-columns: 74px minmax(0, 1fr);
    align-items: start;
    column-gap: 22px;
  }

  .page-about .about-line__side {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    border-top: 1px solid var(--ivory-2);
    padding-top: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: clamp(28px, 4.4vw, 68px);
    align-items: start;
  }

  .page-about .about-axis {
    position: sticky;
    top: calc(var(--topbar-h) + 26px);
  }

  .page-about .about-charter__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-line {
    grid-template-columns: 88px minmax(0, 1fr) 190px;
    column-gap: 26px;
    padding: 24px 26px;
  }

  .page-about .about-line__side {
    grid-column: 3;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    border-top: 0;
    padding-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .tabs__tab {
    transition: none;
  }

  .page-about .about-line:hover {
    transform: none;
  }
}