.page-about {
  --about-sec-pad: 64px;
  --about-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-soft);
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-deep);
  border-bottom-color: var(--gold);
}

.page-about .about-link--invert {
  color: var(--gold-soft);
  border-bottom-color: rgba(201, 169, 97, 0.5);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 20px 0 8px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__figure img,
.page-about .about-versions__banner img,
.page-about .about-team__figure img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-hero__stamp {
  margin: 14px 0 0;
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  color: var(--gold-deep);
}

.page-about .about-hero__body h1 {
  margin: 10px 0 0;
  font-size: var(--fs-display);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  font-size: var(--fs-md);
  line-height: 1.9;
  color: var(--ink-mid);
  max-width: 56ch;
}

.page-about .about-hero__lead--sub {
  margin-top: 14px;
  font-size: var(--fs-sm);
  color: var(--ink-mid);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 32px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-hero__fact {
  background: var(--card);
  padding: 16px 18px;
}

.page-about .about-hero__fact dt {
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--ink-mid);
}

.page-about .about-hero__fact dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: 0.02em;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: var(--about-sec-pad) 0;
  position: relative;
}

.page-about .about-sec__head {
  display: grid;
  gap: 12px;
  margin-bottom: 34px;
  max-width: 74ch;
}

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.24em;
  color: var(--gold-deep);
}

.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-sec__lead {
  margin: 0;
  font-size: var(--fs-md);
  line-height: 1.9;
  color: var(--ink-mid);
}

/* ---------- 01 会馆十二年 ---------- */
.page-about .about-era {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-era__watermark {
  position: absolute;
  top: 8px;
  right: -12px;
  font-size: clamp(5.5rem, 20vw, 14rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--mist);
  pointer-events: none;
  user-select: none;
}

.page-about .about-era__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-era__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-era__prose p {
  margin: 0 0 1.2em;
  font-size: var(--fs-md);
  line-height: 1.9;
  color: var(--ink-mid);
}

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

.page-about .about-era__subtitle {
  margin: 0 0 16px;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--ink);
}

.page-about .about-audience {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-audience__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-1);
  transition: border-color 0.22s ease, transform 0.22s ease;
}

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

.page-about .about-audience__num {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--gold-deep);
}

.page-about .about-audience__text {
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--ink-mid);
}

/* ---------- 02 版本迭代 ---------- */
.page-about .about-versions {
  background: linear-gradient(180deg, var(--paper) 0%, var(--mist) 55%, var(--paper) 100%);
}

.page-about .about-versions__banner {
  margin: 0 0 34px;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-about .about-versions__banner img {
  width: 100%;
  max-height: 260px;
  object-fit: cover;
  display: block;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 6px;
  border-left: 1px solid var(--ink);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 20px 26px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -5px;
  top: 16px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--mist);
}

.page-about .about-timeline__node {
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-1);
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-about .about-timeline__node:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow-2);
}

.page-about .about-timeline__node[open] {
  border-color: var(--gold-soft);
}

.page-about .about-timeline__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-timeline__summary::after {
  content: "＋";
  margin-left: auto;
  font-size: var(--fs-sm);
  color: var(--gold-deep);
}

.page-about .about-timeline__node[open] > .about-timeline__summary::after {
  content: "－";
}

.page-about .about-timeline__summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
  border-radius: var(--about-radius);
}

.page-about .about-timeline__stage {
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--gold-deep);
}

.page-about .about-timeline__name {
  font-size: var(--fs-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-timeline__body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line-soft);
  margin-top: 4px;
  padding-top: 16px;
}

.page-about .about-timeline__body p {
  margin: 0 0 0.9em;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--ink-mid);
}

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

.page-about .about-versions__note {
  margin: 26px 0 0;
  padding-left: 32px;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--ink-mid);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-team {
  display: grid;
  gap: 14px;
}

.page-about .about-team__cell {
  position: relative;
  padding: 22px 22px 20px;
  background: var(--card);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-1);
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.page-about .about-team__cell:hover,
.page-about .about-team__cell:focus-visible {
  border-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-about .about-team__cell:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .about-team__num {
  display: inline-block;
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  background: var(--mist);
  border-radius: 999px;
  padding: 3px 10px;
}

.page-about .about-team__name {
  margin: 12px 0 8px;
  font-size: var(--fs-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--ink-mid);
  opacity: 0.86;
  transition: opacity 0.22s ease;
}

.page-about .about-team__cell:hover .about-team__desc,
.page-about .about-team__cell:focus-visible .about-team__desc {
  opacity: 1;
}

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

/* ---------- 04 服务标准 ---------- */
.page-about .about-standard {
  padding: var(--about-sec-pad) 0;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-standard__head .about-sec__num {
  color: var(--gold);
}

.page-about .about-standard__head .about-sec__title {
  color: var(--paper);
}

.page-about .about-standard__head .about-sec__lead {
  color: rgba(247, 248, 246, 0.74);
}

.page-about .about-standard__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-standard__item {
  position: relative;
  padding: 30px 22px 22px;
  border: 1px solid var(--line-invert);
  border-radius: var(--about-radius);
  background: rgba(255, 255, 255, 0.035);
  transition: border-color 0.22s ease, background 0.22s ease;
}

.page-about .about-standard__item:hover {
  border-color: rgba(201, 169, 97, 0.6);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .about-standard__item::before {
  content: "";
  position: absolute;
  left: 22px;
  top: -1px;
  width: 40px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-standard__no {
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-standard__name {
  margin: 12px 0 10px;
  font-size: var(--fs-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-standard__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: rgba(247, 248, 246, 0.78);
}

.page-about .about-path {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-path__step {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--line-invert);
  display: grid;
  gap: 6px;
}

.page-about .about-path__step::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
}

.page-about .about-path__label {
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--gold-soft);
}

.page-about .about-path__text {
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(247, 248, 246, 0.82);
}

.page-about .about-standard__note {
  margin: 30px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: rgba(247, 248, 246, 0.72);
}

/* ---------- 05 本地合作 ---------- */
.page-about .about-local__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-local__prose p {
  margin: 0 0 1.2em;
  font-size: var(--fs-md);
  line-height: 1.9;
  color: var(--ink-mid);
}

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

.page-about .about-local__card {
  padding: 24px 22px;
  border-radius: var(--about-radius);
  border: 1px solid var(--line-soft);
  background: var(--card);
  box-shadow: var(--shadow-1);
  height: fit-content;
}

.page-about .about-local__card-title {
  margin: 0 0 16px;
  font-size: var(--fs-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-local__contact {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-local__row {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-local__row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-local__row dt {
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--ink-mid);
}

.page-about .about-local__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  color: var(--ink);
  word-break: break-all;
}

.page-about .about-local__card-note {
  margin: 18px 0 0;
  font-size: var(--fs-xs);
  line-height: 1.8;
  color: var(--ink-mid);
}

.page-about .about-local__cta {
  margin-top: 16px;
  display: inline-block;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: 56px 0 72px;
  background: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 16px;
  max-width: 760px;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: var(--fs-md);
  line-height: 1.9;
  color: var(--ink-mid);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-team {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-era__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-sec-pad: 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 34% 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-standard__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-path {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 44px;
  }

  .page-about .about-local__grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 340px;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-era__watermark {
    top: 4px;
    right: 24px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline__summary {
    padding: 22px 26px;
  }

  .page-about .about-timeline__body {
    padding: 18px 26px 24px;
  }

  .page-about .about-timeline__item {
    padding-left: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-audience__item,
  .page-about .about-team__cell,
  .page-about .about-timeline__node,
  .page-about .about-standard__item,
  .page-about .about-link {
    transition: none;
  }

  .page-about .about-audience__item:hover,
  .page-about .about-team__cell:hover,
  .page-about .about-team__cell:focus-visible {
    transform: none;
  }
}