.page-about {
  --ab-line-soft: rgba(20, 17, 16, .12);
  --ab-paper-soft: rgba(250, 247, 242, .78);
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-sans);
}

.page-about .ab-section {
  padding: clamp(44px, 6vw, 84px) 0;
}

.page-about .ab-head {
  max-width: 780px;
}

.page-about .ab-head--split {
  max-width: none;
  display: grid;
  gap: 16px;
}

.page-about .ab-head .ql-h2 {
  margin: 8px 0 0;
}

/* ---------- 顶部坐标条 ---------- */
.page-about .ab-bar {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.page-about .ab-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-about .ab-bar__coord {
  margin: 0;
  font-size: 12px;
  color: var(--ink-500);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 56px;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 400px;
  background: var(--grad-glass);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-about .ab-hero__text .ql-h1 {
  margin: 10px 0 16px;
}

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

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--sand);
  object-fit: cover;
}

.page-about .ab-hero__media figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 12px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--ink-500);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
  min-width: 0;
}

.page-about .ab-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--ink-900);
}

.page-about .ab-stat__unit {
  margin-left: 3px;
  font-size: 12px;
  color: var(--ink-500);
}

.page-about .ab-stat__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-500);
}

/* ---------- 沿革时间轴 ---------- */
.page-about .ab-time {
  position: relative;
  overflow: hidden;
  background: var(--sand);
  padding-bottom: clamp(52px, 7vw, 96px);
}

.page-about .ab-time__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .12;
  pointer-events: none;
}

.page-about .ab-time__inner {
  position: relative;
}

.page-about .ab-time__lede {
  margin: 14px 0 0;
  max-width: 620px;
  color: var(--ink-700);
}

.page-about .ab-time__track {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-about .ab-time__node {
  position: relative;
  padding: 0 0 30px 26px;
}

.page-about .ab-time__node::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 18px;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

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

.page-about .ab-time__node:last-child::before {
  display: none;
}

.page-about .ab-time__node::after {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1px solid var(--gold-500);
  background: var(--paper);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-time__node:hover::after,
.page-about .ab-time__node:focus-within::after {
  background: var(--flame-600);
  border-color: var(--flame-600);
}

.page-about .ab-time__year {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--gold-500);
  letter-spacing: .12em;
}

.page-about .ab-time__title {
  margin: 0 0 6px;
  font-size: 18px;
}

.page-about .ab-time__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-700);
  max-width: 320px;
}

/* ---------- 空间 ---------- */
.page-about .ab-spaces__lede {
  margin: 14px 0 0;
  color: var(--ink-700);
}

.page-about .ab-pick {
  margin: 26px 0 34px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-about .ab-pick [role="tablist"] {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 10px;
  background: var(--sand);
}

.page-about .ab-pick [role="tab"] {
  flex: 1 1 auto;
  min-width: 90px;
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-700);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-pick [role="tab"][aria-selected="true"] {
  background: var(--paper);
  border-color: var(--line-strong);
  color: var(--flame-600);
}

.page-about .ab-pick [role="tab"]:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 2px;
}

.page-about .ab-pick [role="tabpanel"] {
  padding: 20px;
}

.page-about .ab-pick [role="tabpanel"][hidden] {
  display: none;
}

.page-about .ab-pick [role="tabpanel"] .ql-h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.page-about .ab-pick [role="tabpanel"] p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .ab-spaces__grid {
  display: grid;
  gap: 16px;
}

.page-about .ab-space {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  min-width: 0;
}

.page-about .ab-space--hall {
  background: var(--sand);
}

.page-about .ab-space--banquet {
  background: var(--steppe-100);
}

.page-about .ab-space--tea {
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.page-about .ab-space--digital {
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .ab-space__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .ab-space__coord {
  font-size: 12px;
  color: var(--ink-500);
  letter-spacing: .08em;
}

.page-about .ab-space__cap {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--flame-600);
}

.page-about .ab-space__title {
  margin: 0;
  font-size: 18px;
}

.page-about .ab-space__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .ab-space__use {
  margin: auto 0 0;
  padding-top: 8px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-500);
}

.page-about .ab-space--digital .ab-space__head {
  border-bottom-color: var(--line-dark);
}

.page-about .ab-space--digital .ab-space__coord {
  color: var(--gold-200);
}

.page-about .ab-space--digital .ab-space__cap {
  color: var(--gold-500);
}

.page-about .ab-space--digital .ab-space__desc,
.page-about .ab-space--digital .ab-space__use {
  color: var(--ab-paper-soft);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  background: var(--steppe-100);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-team__intro .ql-h2 {
  margin: 8px 0 14px;
}

.page-about .ab-team__intro > p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .ab-team__media {
  margin: 0 0 16px;
}

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line-strong);
  object-fit: cover;
}

.page-about .ab-team__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-700);
  padding-left: 12px;
  border-left: 2px solid var(--gold-500);
}

.page-about .ab-table-wrap {
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.page-about .ab-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13px;
}

.page-about .ab-table__caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-500);
  background: var(--paper);
}

.page-about .ab-table thead th {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--ink-900);
  background: var(--steppe-100);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .ab-table tbody th {
  padding: 12px 14px;
  text-align: left;
  font-weight: 500;
  color: var(--ink-900);
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.page-about .ab-table tbody td {
  padding: 12px 14px;
  vertical-align: top;
  line-height: 1.7;
  color: var(--ink-700);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-table tbody tr:last-child th,
.page-about .ab-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ab-table tbody tr:hover th,
.page-about .ab-table tbody tr:hover td {
  background: rgba(235, 211, 163, .22);
}

/* ---------- 会员 ---------- */
.page-about .ab-tier-section {
  background: var(--paper);
}

.page-about .ab-tier-section__lede {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .ab-tiers {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .ab-tier {
  min-width: 0;
}

.page-about .ab-tier__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .ab-tier__level {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-about .ab-tier__name {
  margin: 0;
  font-size: 18px;
}

.page-about .ab-tier__bar {
  height: 6px;
  margin: 10px 0 10px;
  background: rgba(20, 17, 16, .08);
}

.page-about .ab-tier__fill {
  display: block;
  height: 100%;
  background: linear-gradient(160deg, #C9922F, #A83A1E);
}

.page-about .ab-tier__fill--1 {
  width: 34%;
}

.page-about .ab-tier__fill--2 {
  width: 66%;
}

.page-about .ab-tier__fill--3 {
  width: 100%;
}

.page-about .ab-tier__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-700);
}

/* ---------- 年度节奏 ---------- */
.page-about .ab-year {
  background: var(--sand);
}

.page-about .ab-year__grid {
  display: grid;
  gap: 30px;
}

.page-about .ab-year__intro .ql-h2 {
  margin: 8px 0 14px;
}

.page-about .ab-year__intro > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-700);
}

.page-about .ab-season {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-season__item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 16px 0;
  border-top: 1px solid var(--line-strong);
}

.page-about .ab-season__label {
  grid-row: span 2;
  font-size: 15px;
  color: var(--flame-600);
  line-height: 1.4;
}

.page-about .ab-season__title {
  margin: 0;
  font-size: 16px;
}

.page-about .ab-season__text {
  margin: 0;
  grid-column: 2;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-700);
}

.page-about .ab-partners {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.page-about .ab-partners__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .ab-partners__num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--steppe-600);
}

.page-about .ab-partners__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-500);
}

.page-about .ab-partners__note {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-700);
}

/* ---------- 检查公示 ---------- */
.page-about .ab-check {
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .ab-check__eyebrow {
  color: var(--gold-200);
}

.page-about .ab-check__title {
  color: var(--paper);
  margin: 8px 0 0;
}

.page-about .ab-check__lede {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-paper-soft);
}

.page-about .ab-check__grid {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

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

.page-about .ab-check__num {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-500);
  margin-bottom: 6px;
}

.page-about .ab-check__name {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--paper);
}

.page-about .ab-check__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ab-paper-soft);
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  background: var(--steppe-100);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .ab-cta__inner .ql-h2 {
  margin: 8px 0 12px;
}

.page-about .ab-cta__inner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-700);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-spaces__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .ab-hero {
    padding: 52px 0 76px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-hero__media {
    margin-top: 28px;
  }

  .page-about .ab-head--split {
    grid-template-columns: 6fr 5fr;
    align-items: end;
    gap: 32px;
  }

  .page-about .ab-time__track {
    flex-direction: row;
    align-items: flex-start;
    margin-top: 44px;
  }

  .page-about .ab-time__node {
    padding: 46px 24px 0 0;
    min-width: 0;
  }

  .page-about .ab-time__node::before {
    left: 0;
    right: 0;
    top: 22px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .ab-time__node::after {
    top: 16px;
  }

  .page-about .ab-time__year {
    position: absolute;
    top: 0;
    left: 0;
    margin: 0;
  }

  .page-about .ab-time__node:nth-child(1) {
    flex: 5 1 0;
  }

  .page-about .ab-time__node:nth-child(2) {
    flex: 2 1 0;
  }

  .page-about .ab-time__node:nth-child(3) {
    flex: 3 1 0;
  }

  .page-about .ab-time__node:nth-child(4) {
    flex: 3 1 0;
    padding-right: 0;
  }

  .page-about .ab-team__grid {
    grid-template-columns: 4fr 7fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .ab-year__grid {
    grid-template-columns: 5fr 6fr;
    gap: 32px 48px;
    align-items: start;
  }

  .page-about .ab-partners {
    grid-column: 2;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: 7fr 4fr;
    align-items: end;
    gap: 40px;
  }

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

@media (min-width: 1080px) {
  .page-about .ab-spaces__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-space--hall {
    grid-column: span 4;
  }

  .page-about .ab-space--banquet {
    grid-column: span 2;
  }

  .page-about .ab-space--tea {
    grid-column: span 2;
  }

  .page-about .ab-space--digital {
    grid-column: span 4;
  }

  .page-about .ab-space {
    padding: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-time__node::after,
  .page-about .ab-pick [role="tab"] {
    transition: none;
  }
}