.page-about {
  --about-line: rgba(11, 37, 69, 0.12);
  --about-line-soft: rgba(11, 37, 69, 0.07);
  --about-radius: 22px;
  --about-panel: #FFFFFF;
  display: block;
}

.page-about .tx-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--tx-maxw);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ---------- 面包屑 ---------- */
.page-about .tx-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--tx-mist);
  padding-top: 22px;
}

.page-about .tx-breadcrumb a {
  color: var(--tx-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms var(--tx-ease), color 200ms var(--tx-ease);
}

.page-about .tx-breadcrumb a:hover {
  color: var(--tx-orange);
  border-bottom-color: var(--tx-orange);
}

/* ---------- 通用小节标题 ---------- */
.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--tx-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--tx-orange);
}

.page-about .about-kicker--light {
  color: var(--tx-sand);
}

.page-about .about-caption {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--tx-mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 28px 0 44px;
  background:
    radial-gradient(560px 320px at 84% 10%, rgba(245, 166, 35, 0.20), transparent 70%),
    radial-gradient(440px 300px at 6% 90%, rgba(255, 107, 53, 0.13), transparent 72%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-hero__copy .tx-h1 {
  margin: 0 0 18px;
  color: var(--tx-deep);
  line-height: 1.16;
}

.page-about .about-hero__copy .tx-lead {
  margin: 0;
  max-width: 46em;
  color: rgba(28, 28, 30, 0.74);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-hero__num {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--tx-deep);
}

.page-about .about-hero__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--tx-mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__visual {
  position: relative;
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.page-about .about-orbit {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-orbit__spin {
  transform-origin: 210px 210px;
  animation: about-orbit-spin 40s linear infinite;
}

.page-about .about-hero__visual:hover .about-orbit__spin {
  animation-play-state: paused;
}

@keyframes about-orbit-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.page-about .about-orbit__label {
  position: absolute;
  font-family: var(--tx-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(11, 37, 69, 0.10);
  color: var(--tx-deep);
  white-space: nowrap;
  box-shadow: 0 8px 20px rgba(11, 37, 69, 0.08);
}

.page-about .about-orbit__label--a {
  left: 2%;
  bottom: 16%;
}

.page-about .about-orbit__label--b {
  right: 0;
  top: 14%;
}

/* ---------- 本页导览 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-jump__link {
  display: inline-block;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(11, 37, 69, 0.14);
  background: rgba(255, 255, 255, 0.62);
  color: var(--tx-deep);
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  transition: background-color 200ms var(--tx-ease), color 200ms var(--tx-ease), border-color 200ms var(--tx-ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link[aria-current="true"] {
  background: var(--tx-gold);
  border-color: transparent;
  color: #FFFFFF;
}

/* ---------- 品牌初衷 ---------- */
.page-about .about-story {
  margin-top: 44px;
  padding: 56px 0 60px;
  background: linear-gradient(180deg, #FFF7EC 0%, #FFEFD9 100%);
}

.page-about .about-story .tx-h2 {
  margin: 0;
  color: var(--tx-deep);
  max-width: 20em;
}

.page-about .about-story__figure {
  margin: 30px 0 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: var(--tx-shadow-soft);
}

.page-about .about-story__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-about .about-story__figure .about-caption {
  margin: 12px 16px 14px;
}

.page-about .about-story__body {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

.page-about .about-story__body p {
  margin: 0;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(28, 28, 30, 0.82);
}

/* ---------- 版本演进展厅 ---------- */
.page-about .about-versions {
  --about-line: rgba(255, 215, 154, 0.20);
  position: relative;
  padding: 60px 0 68px;
  color: var(--tx-milk);
  background:
    radial-gradient(760px 420px at 90% 0%, rgba(245, 166, 35, 0.24), transparent 68%),
    radial-gradient(520px 380px at 0% 100%, rgba(255, 107, 53, 0.16), transparent 70%),
    var(--tx-deep);
}

.page-about .about-versions__grid {
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-about .about-versions__copy .tx-h2 {
  margin: 0 0 16px;
  color: var(--tx-milk);
}

.page-about .about-versions__copy .tx-lead {
  margin: 0;
  color: rgba(255, 247, 236, 0.78);
}

.page-about .about-versions__figure {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 215, 154, 0.18);
}

.page-about .about-versions__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0 0 0 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--tx-gold) 0%, var(--tx-orange) 52%, rgba(255, 215, 154, 0.12) 100%);
}

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

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

.page-about .about-timeline__tick {
  position: absolute;
  left: -29px;
  top: 24px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--tx-navy);
  border: 2px solid rgba(255, 215, 154, 0.45);
  transition: background-color 240ms var(--tx-ease), box-shadow 240ms var(--tx-ease), border-color 240ms var(--tx-ease);
}

.page-about .about-node[open] + .about-timeline__tick,
.page-about .about-timeline__item:has(.about-node[open]) .about-timeline__tick {
  background: var(--tx-gold);
  border-color: var(--tx-gold);
  box-shadow: 0 0 0 6px rgba(245, 166, 35, 0.16);
}

.page-about .about-node {
  background: rgba(18, 59, 99, 0.66);
  border: 1px solid var(--about-line);
  border-radius: 18px;
  overflow: hidden;
}

.page-about .about-node__summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 22px 54px 22px 22px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node__summary::after {
  content: "";
  position: absolute;
  right: 26px;
  top: 28px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--tx-sand);
  border-bottom: 2px solid var(--tx-sand);
  transform: rotate(45deg);
  transition: transform 240ms var(--tx-ease);
}

.page-about .about-node[open] .about-node__summary::after {
  transform: rotate(-135deg);
}

.page-about .about-node__ver {
  font-size: 20px;
  font-weight: 700;
  color: var(--tx-gold);
  letter-spacing: 0.02em;
}

.page-about .about-node__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--tx-milk);
}

.page-about .about-node__tag {
  font-size: 12px;
  line-height: 1;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--tx-gold);
  color: #24160A;
  font-weight: 700;
}

.page-about .about-node__meta {
  flex: 1 1 160px;
  font-family: var(--tx-font-mono);
  font-size: 12px;
  color: rgba(255, 215, 154, 0.78);
}

.page-about .about-node__body {
  padding: 0 22px 22px;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(255, 247, 236, 0.80);
}

/* ---------- 会馆空间与团队 ---------- */
.page-about .about-venue {
  padding: 60px 0 64px;
  background: #FFFDF8;
}

.page-about .about-venue__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-venue__copy .tx-h2 {
  margin: 0 0 18px;
  color: var(--tx-deep);
}

.page-about .about-venue__copy p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(28, 28, 30, 0.80);
}

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

.page-about .about-venue__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: var(--tx-shadow-soft);
}

.page-about .about-venue__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-venue__figure .about-caption {
  margin: 12px 16px 14px;
}

.page-about .about-team {
  display: grid;
  gap: 20px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-team__num {
  font-size: 24px;
  font-weight: 700;
  color: var(--tx-orange);
  letter-spacing: 0.01em;
}

.page-about .about-team__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--tx-mist);
}

/* ---------- 会员权益 ---------- */
.page-about .about-members {
  padding: 58px 0 64px;
  background: linear-gradient(180deg, #FFF3E3 0%, #FFF9F0 100%);
}

.page-about .about-members .tx-h2 {
  margin: 0 0 16px;
  color: var(--tx-deep);
}

.page-about .about-members .tx-lead {
  margin: 0;
  max-width: 42em;
  color: rgba(28, 28, 30, 0.74);
}

.page-about .about-tier-grid {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.page-about .about-tier {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 22px 28px;
  border-radius: 20px;
  background: var(--about-panel);
  border: 1px solid var(--about-line);
  box-shadow: 0 10px 26px rgba(11, 37, 69, 0.06);
}

.page-about .about-tier--top {
  background: linear-gradient(158deg, #0B2545 0%, #123B63 100%);
  border-color: transparent;
  box-shadow: 0 18px 40px rgba(11, 37, 69, 0.22);
}

.page-about .about-tier__rank {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--tx-mist);
}

.page-about .about-tier--top .about-tier__rank {
  color: var(--tx-sand);
}

.page-about .about-tier__name {
  margin: 0;
  font-size: 21px;
  font-weight: 700;
  color: var(--tx-deep);
}

.page-about .about-tier--top .about-tier__name {
  color: var(--tx-milk);
}

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

.page-about .about-tier__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(28, 28, 30, 0.78);
}

.page-about .about-tier__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tx-mint);
}

.page-about .about-tier--top .about-tier__list li {
  color: rgba(255, 247, 236, 0.82);
}

.page-about .about-tier--top .about-tier__list li::before {
  background: var(--tx-gold);
}

/* ---------- 备案与认可 ---------- */
.page-about .about-trust {
  padding: 58px 0 60px;
  background: #FFFFFF;
}

.page-about .about-trust .tx-h2 {
  margin: 0 0 32px;
  color: var(--tx-deep);
}

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

.page-about .about-credit {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border-radius: 18px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--tx-gold);
  background: #FFFDF8;
}

.page-about .about-credit__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--tx-mist);
}

.page-about .about-credit__value {
  font-size: 19px;
  font-weight: 700;
  color: var(--tx-deep);
  letter-spacing: 0.01em;
}

.page-about .about-credit__note {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(28, 28, 30, 0.66);
}

/* ---------- 到访指引 ---------- */
.page-about .about-partners {
  padding: 52px 0 60px;
  background: linear-gradient(180deg, #FFF7EC 0%, #FFFDF8 100%);
}

.page-about .about-partners__inner {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .about-partners__copy .tx-h2 {
  margin: 0 0 18px;
  color: var(--tx-deep);
}

.page-about .about-partners__copy p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(28, 28, 30, 0.80);
}

.page-about .about-partners__more {
  margin-top: 22px;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-partners__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--about-line);
}

.page-about .about-partners__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--tx-orange);
}

.page-about .about-partners__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--tx-deep);
  font-weight: 600;
}

.page-about .about-partners__sub {
  font-size: 13px;
  line-height: 1.6;
  color: var(--tx-mist);
}

/* ---------- 收束区块 ---------- */
.page-about .about-close {
  margin-top: 8px;
  padding: 58px 0 56px;
  border-radius: 28px 28px 0 0;
  color: var(--tx-milk);
  background:
    radial-gradient(620px 320px at 16% 0%, rgba(245, 166, 35, 0.30), transparent 70%),
    radial-gradient(520px 320px at 92% 100%, rgba(255, 107, 53, 0.22), transparent 72%),
    var(--tx-deep);
}

.page-about .about-close .tx-h2 {
  margin: 0 0 18px;
  color: var(--tx-milk);
}

.page-about .about-close__lead {
  margin: 0;
  max-width: 44em;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(255, 247, 236, 0.80);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-close__icp {
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 215, 154, 0.20);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(255, 215, 154, 0.72);
}

/* ---------- 滚动渐显 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

.tx-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms var(--tx-ease), transform 600ms var(--tx-ease);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .tx-wrap {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

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

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

  .page-about .about-story__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 40px 0 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-about .about-hero__visual {
    max-width: 460px;
  }

  .page-about .about-story {
    padding: 72px 0 76px;
  }

  .page-about .about-versions {
    padding: 76px 0 84px;
  }

  .page-about .about-versions__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-timeline {
    margin-top: 52px;
    padding-left: 40px;
  }

  .page-about .about-timeline::before {
    left: 10px;
  }

  .page-about .about-timeline__tick {
    left: -37px;
    width: 18px;
    height: 18px;
  }

  .page-about .about-node__summary {
    padding: 26px 60px 26px 30px;
  }

  .page-about .about-node__body {
    padding: 0 30px 26px;
  }

  .page-about .about-venue {
    padding: 76px 0 80px;
  }

  .page-about .about-venue__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 52px;
  }

  .page-about .about-members {
    padding: 72px 0 78px;
  }

  .page-about .about-trust {
    padding: 72px 0 76px;
  }

  .page-about .about-partners {
    padding: 68px 0 76px;
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
  }

  .page-about .about-close {
    padding: 72px 0 64px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-tier-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-orbit__spin {
    animation: none;
  }

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