.page-about {
  background: var(--paper);
  color: var(--ink);
}

.page-about img {
  max-width: 100%;
}

.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}

.js .page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ============ 首屏 ============ */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-deep);
  color: var(--paper);
  padding: clamp(52px, 8vw, 96px) 0 clamp(38px, 6vw, 64px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -14%;
  width: min(620px, 84vw);
  height: min(620px, 84vw);
  background: radial-gradient(circle at 40% 40%, rgba(183, 69, 47, .82), rgba(183, 69, 47, 0) 66%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 5px;
  background: linear-gradient(90deg, var(--brick) 0 40%, var(--gold) 40% 66%, var(--turquoise) 66% 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 52px);
}

.page-about .about-crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  font-size: 13px;
  letter-spacing: .06em;
}

.page-about .about-crumbs li {
  color: rgba(247, 242, 231, .58);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(231, 178, 74, .55);
}

.page-about .about-crumbs a {
  color: rgba(247, 242, 231, .82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-crumbs a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-crumbs [aria-current="page"] {
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 48px);
  line-height: 1.22;
  letter-spacing: .01em;
}

.page-about .about-hero__sub {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 242, 231, .78);
}

.page-about .about-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__panel {
  border: 1px solid var(--light-line);
  background: rgba(247, 242, 231, .05);
  padding: clamp(18px, 3vw, 22px);
  box-shadow: 8px 9px 0 rgba(0, 0, 0, .22);
}

.page-about .about-hero__panel-label {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  background: rgba(247, 242, 231, .06);
  border: 1px solid var(--light-line);
}

.page-about .about-stat--key {
  grid-column: 1 / -1;
  background: var(--brick);
  border-color: rgba(231, 178, 74, .45);
}

.page-about .about-stat--outline {
  grid-column: 1 / -1;
  background: transparent;
  border: 1px solid rgba(231, 178, 74, .55);
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: 23px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--gold);
}

.page-about .about-stat--key .about-stat__num {
  color: var(--paper);
}

.page-about .about-stat__cap {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(247, 242, 231, .76);
}

.page-about .about-stat--key .about-stat__cap {
  color: rgba(247, 242, 231, .92);
}

/* ============ 章节索引 ============ */

.page-about .about-jump {
  background: var(--ink-deep);
  border-top: 1px solid var(--light-line);
}

.page-about .about-jump__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump__list a {
  display: block;
  padding: 15px 18px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(247, 242, 231, .62);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-jump__list a:hover {
  color: var(--paper);
}

.page-about .about-jump__list a[aria-current="true"] {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ============ 区块通用 ============ */

.page-about .about-band {
  position: relative;
  padding: clamp(54px, 8vw, 100px) 0;
}

.page-about .about-band--road {
  background: var(--paper);
}

.page-about .about-band--crew {
  background: var(--ink-deep);
  color: var(--paper);
}

.page-about .about-band--reach {
  background: var(--card-paper);
}

.page-about .about-band--rhythm {
  background: var(--paper-gold);
}

.page-about .about-band--join {
  background: var(--paper);
}

.page-about .about-head {
  max-width: 74ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-head__num {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--brick);
}

.page-about .about-head__title {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(22px, 3.3vw, 36px);
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-head__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-head--light .about-head__num {
  color: var(--gold);
}

.page-about .about-head--light .about-head__title {
  color: var(--paper);
}

.page-about .about-head--light .about-head__lead {
  color: rgba(247, 242, 231, .74);
}

/* ============ 01 时间线 ============ */

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

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

.page-about .about-road__year {
  display: inline-block;
  width: fit-content;
  margin-bottom: 12px;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--paper);
  background: var(--brick);
}

.page-about .about-road__body {
  position: relative;
  border-left: 1px solid var(--line-strong);
  padding: 0 0 30px 26px;
}

.page-about .about-road__body::before {
  content: "";
  position: absolute;
  left: -5.5px;
  top: 5px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--paper);
}

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

.page-about .about-road__title {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-road__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ============ 02 团队 ============ */

.page-about .about-shot {
  margin: 0 0 16px;
  border: 1px solid var(--light-line);
  box-shadow: 8px 9px 0 rgba(0, 0, 0, .28);
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: clamp(190px, 28vw, 320px);
  object-fit: cover;
}

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

.page-about .about-crew__cell {
  background: rgba(247, 242, 231, .05);
  border: 1px solid var(--light-line);
  border-top: 3px solid var(--gold);
  padding: 22px 22px 24px;
  transition: transform .25s var(--ease), background .25s var(--ease);
}

.page-about .about-crew__cell:hover {
  transform: translateY(-4px);
  background: rgba(247, 242, 231, .09);
}

.page-about .about-crew__cell--b {
  border-top-color: var(--turquoise);
}

.page-about .about-crew__cell--c {
  border-top-color: var(--brick);
}

.page-about .about-crew__cell--d {
  border-top-color: var(--coral);
}

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

.page-about .about-crew__title {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.38;
  color: var(--paper);
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 242, 231, .74);
}

/* ============ 03 覆盖 ============ */

.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  align-items: stretch;
}

.page-about .about-reach__chart {
  border: 1px solid var(--line-strong);
  background: var(--card-paper);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: 7px 8px 0 rgba(183, 69, 47, .14);
}

.page-about .about-reach__chart-title {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--brick);
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 15px;
}

.page-about .about-reach__row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
}

.page-about .about-reach__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .about-reach__track {
  display: block;
  height: 10px;
  background: rgba(20, 31, 30, .08);
}

.page-about .about-reach__bar {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--turquoise), var(--lane));
}

.page-about .about-reach__row:nth-child(1) .about-reach__bar { width: 100%; }
.page-about .about-reach__row:nth-child(2) .about-reach__bar { width: 88%; }
.page-about .about-reach__row:nth-child(3) .about-reach__bar { width: 76%; }
.page-about .about-reach__row:nth-child(4) .about-reach__bar { width: 68%; }
.page-about .about-reach__row:nth-child(5) .about-reach__bar { width: 60%; }

.page-about .about-reach__foot {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-reach__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-about .about-reach__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 230px;
  object-fit: cover;
}

/* ============ 04 节奏 ============ */

.page-about .about-rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-rhythm__table {
  display: grid;
  gap: 10px;
}

.page-about .about-rhythm__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  background: var(--card-paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lane);
  padding: 16px 18px;
  transition: border-left-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-rhythm__row:hover {
  border-left-color: var(--brick);
  box-shadow: 4px 5px 0 rgba(20, 31, 30, .1);
}

.page-about .about-rhythm__row--head {
  display: none;
}

.page-about .about-rhythm__line {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--lane);
}

.page-about .about-rhythm__cycle {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-rhythm__note {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-rhythm__media {
  margin: 0;
  border: 1px solid var(--line-strong);
  box-shadow: 7px 8px 0 rgba(6, 42, 50, .16);
}

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

/* ============ 05 共建 ============ */

.page-about .about-join {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
}

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

.page-about .about-join__main .btn {
  margin-top: 26px;
}

.page-about .about-join__side {
  align-self: start;
  border: 1px solid var(--line-strong);
  background: var(--card-paper);
  padding: 22px 22px 24px;
  box-shadow: 7px 8px 0 rgba(44, 154, 140, .16);
}

.page-about .about-join__side-title {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--turquoise);
}

.page-about .about-join__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-join__links a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-join__links a:hover {
  border-color: var(--gold);
  background: var(--paper-gold);
  transform: translateX(3px);
}

.page-about .about-join__links .mono {
  color: var(--brick);
  font-weight: 600;
}

.page-about .about-seal {
  display: block;
  width: 96px;
  height: 96px;
  margin: 46px 0 0 auto;
  color: var(--brick);
  opacity: .82;
}

.page-about .about-seal__top {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  fill: currentColor;
}

.page-about .about-seal__bottom {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: .1em;
  fill: currentColor;
}

/* ============ 响应式 ============ */

@media (min-width: 720px) {
  .page-about .about-road__item {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 0 20px;
  }

  .page-about .about-road__year {
    margin-bottom: 0;
    padding: 2px 0 0;
    background: transparent;
    color: var(--brick);
    font-size: 15px;
    text-align: right;
  }

  .page-about .about-rhythm__row {
    grid-template-columns: 94px 168px minmax(0, 1fr);
    gap: 0 18px;
    align-items: baseline;
  }

  .page-about .about-rhythm__row--head {
    display: grid;
    background: transparent;
    border: none;
    border-left: 3px solid transparent;
    padding: 0 18px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .18em;
    color: rgba(20, 31, 30, .5);
  }

  .page-about .about-rhythm__row--head:hover {
    border-left-color: transparent;
    box-shadow: none;
  }
}

@media (min-width: 860px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-crew {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-crew__cell--a { grid-column: span 7; }
  .page-about .about-crew__cell--b { grid-column: span 5; }
  .page-about .about-crew__cell--c { grid-column: span 5; }
  .page-about .about-crew__cell--d { grid-column: span 7; }

  .page-about .about-join {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-rhythm {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(300px, .85fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .js .page-about [data-reveal],
  .js .page-about [data-reveal].is-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-crew__cell,
  .page-about .about-join__links a,
  .page-about .about-rhythm__row {
    transition: none;
  }
}