.page-about {
  --about-line: rgba(200, 162, 75, 0.30);
  --about-line-soft: rgba(242, 231, 211, 0.12);
  --about-amber: rgba(200, 162, 75, 0.14);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(48px, 8vw, 104px);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.18;
  color: var(--frost);
}

.page-about p {
  margin: 0 0 1em;
  max-width: 34em;
}

.page-about a {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 162, 75, 0.45);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--frost);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(130% 100% at 8% -20%, rgba(200, 162, 75, 0.18), transparent 60%),
    radial-gradient(90% 80% at 96% 10%, rgba(47, 93, 98, 0.28), transparent 66%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 82%);
  padding: clamp(22px, 4vw, 40px) 0 clamp(34px, 6vw, 76px);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero__inner::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(10px, 2vw, 22px));
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold), transparent);
  opacity: 0.55;
}

.page-about .about-crumb-current {
  color: var(--sand);
}

.page-about .eyebrow {
  margin: clamp(14px, 3vw, 30px) 0 clamp(10px, 2vw, 16px);
  color: var(--gold);
  letter-spacing: 0.22em;
  font-size: 12px;
}

.page-about .about-hero__title {
  font-size: clamp(38px, 7.6vw, 104px);
  letter-spacing: -0.01em;
  color: var(--frost);
  text-shadow: 0 18px 46px rgba(0, 0, 0, 0.55);
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.35vw, 18px);
  color: var(--paper);
  max-width: 32em;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__marks {
  list-style: none;
  margin: 0;
  padding: clamp(14px, 2.4vw, 20px) 0 0;
  border-top: 1px solid var(--about-line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(20px, 5vw, 56px);
  font-size: 13.5px;
  color: var(--sand);
}

.page-about .about-hero__markKey {
  display: inline-block;
  margin-right: 10px;
  padding: 1px 7px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
  border: 1px solid var(--about-line);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  padding-top: clamp(28px, 5vw, 64px);
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-index {
  border-top: 1px solid var(--about-line);
  padding-top: 12px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 6px;
}

.page-about .about-index__link {
  display: inline-block;
  white-space: nowrap;
  padding: 5px 10px;
  font-size: 13px;
  color: var(--sand);
  border: 1px solid var(--about-line-soft);
  border-bottom-color: var(--about-line-soft);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: clamp(26px, 4vw, 46px) 0 clamp(24px, 4vw, 42px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-sections > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec--tint {
  position: relative;
  background: linear-gradient(180deg, rgba(31, 42, 37, 0.55), rgba(11, 10, 9, 0));
  border-top-color: var(--about-line);
  padding-left: clamp(12px, 2.6vw, 28px);
  padding-right: clamp(12px, 2.6vw, 28px);
  margin-left: calc(-1 * clamp(12px, 2.6vw, 28px));
  margin-right: calc(-1 * clamp(12px, 2.6vw, 28px));
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: clamp(14px, 2.4vw, 24px);
}

.page-about .about-sec__no {
  flex: none;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  border: 1px solid var(--about-line);
  padding: 3px 7px;
}

.page-about .about-sec__title {
  font-size: clamp(24px, 3.6vw, 44px);
}

.page-about .about-sec__lead {
  color: var(--sand);
  font-size: 15px;
  max-width: 36em;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-cap {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sand);
  border-left: 1px solid var(--about-line);
  padding-left: 10px;
}

.page-about .note {
  margin-top: 18px;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  color: var(--sand);
  font-size: 14px;
  max-width: 34em;
}

/* ---------- 01 源流 ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
}

.page-about .about-origin__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-origin__text {
  font-size: 15.5px;
}

.page-about .about-creed {
  margin-top: clamp(22px, 4vw, 40px);
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--about-line);
  background:
    linear-gradient(135deg, rgba(200, 162, 75, 0.10), transparent 55%),
    var(--pine);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 26px);
  align-items: center;
}

.page-about .about-creed__seal {
  width: 78px;
  height: 78px;
  color: var(--gold);
  flex: none;
}

.page-about .about-creed__label {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--gold);
}

.page-about .about-creed__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 21px);
  line-height: 1.7;
  color: var(--paper);
  max-width: 32em;
}

/* ---------- 02 栏目矩阵 ---------- */
.page-about .about-matrix {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-matrix__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-matrix__no {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
  padding-top: 4px;
}

.page-about .about-matrix__title {
  font-size: clamp(17px, 2vw, 21px);
  color: var(--frost);
}

.page-about .about-matrix__text {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  color: var(--sand);
  max-width: 40em;
}

.page-about .about-inline-link {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--sand);
}

/* ---------- 03 双端 ---------- */
.page-about .about-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-duo__main {
  font-size: 15.5px;
}

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

.page-about .about-side__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-about .about-version {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-about .about-version__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--about-line-soft);
}

.page-about .about-version__key {
  font-size: 13.5px;
  color: var(--sand);
}

.page-about .about-version__val {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}

.page-about .about-side__note {
  margin: 0;
  font-size: 13.5px;
  color: var(--sand);
  max-width: 30em;
}

/* ---------- 04 湖北 ---------- */
.page-about .about-hubei {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  align-items: start;
}

.page-about .about-hubei__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hubei__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: 0.92;
  clip-path: polygon(22px 0, 100% 0, 100% 100%, 0 100%, 0 22px);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
}

.page-about .about-stats__item {
  background: var(--ink);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: background 0.3s var(--ease);
}

.page-about .about-stats__item:hover,
.page-about .about-stats__item:focus-within {
  background: var(--ink-2);
}

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.01em;
}

.page-about .about-stats__unit {
  font-size: 0.42em;
  margin-left: 4px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-stats__label {
  font-size: 13px;
  color: var(--frost);
  letter-spacing: 0.04em;
}

.page-about .about-stats__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--sand);
  opacity: 0.7;
  transition: opacity 0.3s var(--ease);
}

.page-about .about-stats__item:hover .about-stats__note {
  opacity: 1;
}

/* ---------- 05 历程 ---------- */
.page-about .about-history {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(200, 162, 75, 0.12));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(18px, 2.6vw, 26px) 34px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 11px;
  height: 11px;
  transform: rotate(45deg);
  background: var(--ink);
  border: 1px solid var(--gold);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-about .about-timeline__year {
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--gold-bright);
  margin-bottom: 4px;
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14.5px;
  color: var(--sand);
  max-width: 34em;
}

.page-about .about-history__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-history__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--about-line);
}

.page-about .about-partner {
  margin-top: clamp(22px, 4vw, 36px);
  padding-top: clamp(16px, 2.6vw, 24px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-partner__title {
  font-size: clamp(17px, 2vw, 21px);
  margin-bottom: 10px;
  color: var(--frost);
}

.page-about .about-partner p {
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-partner__call {
  color: var(--sand);
  font-size: 14px;
}

/* ---------- 06 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 30px);
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
  padding: clamp(14px, 2.4vw, 22px) 0;
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(52px, 9vw, 96px);
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.02em;
}

.page-about .about-team__unit {
  font-size: 0.3em;
  margin-left: 6px;
  color: var(--gold);
}

.page-about .about-team__desc {
  margin: 8px 0 0;
  font-size: 14px;
  color: var(--sand);
  max-width: 26em;
}

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

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--about-line-soft);
}

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

.page-about .about-team__key {
  font-size: 14px;
  color: var(--frost);
  letter-spacing: 0.04em;
}

.page-about .about-team__val {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--gold-bright);
}

.page-about .about-team__txt {
  grid-column: 1 / -1;
  font-size: 13px;
  color: var(--sand);
}

.page-about .about-rules {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-rules__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding: 12px 14px;
  background: var(--ink-2);
  border-left: 2px solid var(--azurite);
}

.page-about .about-rules__no {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.1em;
  padding-top: 3px;
}

.page-about .about-rules__item p {
  margin: 0;
  font-size: 14px;
  color: var(--sand);
  max-width: 36em;
}

.page-about .about-cta {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--about-line);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(182, 64, 46, 0.18), transparent 62%),
    var(--pine);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  display: grid;
  gap: 16px;
}

.page-about .about-cta__text {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 22px);
  color: var(--frost);
  max-width: 26em;
  line-height: 1.6;
}

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

.page-about .about-cta .btn {
  border-bottom: 0;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-matrix__item {
    grid-template-columns: 60px minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 6px 20px;
    padding: 18px 0;
  }

  .page-about .about-matrix__text {
    grid-column: 3;
    padding-top: 3px;
  }

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

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(24px, 3.4vw, 44px);
  }

  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(24px, 4vw, 52px);
  }

  .page-about .about-duo__side {
    border-top: 0;
    border-left: 1px solid var(--about-line);
    padding-top: 0;
    padding-left: clamp(16px, 2.4vw, 26px);
  }

  .page-about .about-hubei {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(24px, 3.6vw, 46px);
  }

  .page-about .about-history {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: clamp(24px, 3.6vw, 46px);
  }

  .page-about .about-history__figure {
    position: sticky;
    top: 132px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.55fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(20px, 3vw, 40px);
  }
}

/* ---------- 桌面：竖向跟随索引 ---------- */
@media (min-width: 1040px) {
  .page-about .about-body__inner {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(30px, 3.6vw, 56px);
  }

  .page-about .about-index {
    position: sticky;
    top: 128px;
    align-self: start;
    border-top: 1px solid var(--about-line);
    padding-top: 14px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding-bottom: 0;
  }

  .page-about .about-index__item {
    border-bottom: 1px solid var(--about-line-soft);
  }

  .page-about .about-index__link {
    display: block;
    border: 0;
    padding: 9px 0 9px 12px;
    position: relative;
    white-space: normal;
    font-size: 13.5px;
    letter-spacing: 0.04em;
  }

  .page-about .about-index__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: transparent;
    transition: background 0.25s var(--ease);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    color: var(--gold-bright);
    background: transparent;
    border-color: transparent;
  }

  .page-about .about-index__link:hover::before,
  .page-about .about-index__link:focus-visible::before {
    background: var(--gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}