.page-about {
  --about-rail: 208px;
  --about-flow-gap: 34px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .bao-crumbs {
  padding-top: 18px;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  border-bottom: var(--hair);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, var(--paper) 6%, rgba(244, 239, 228, 0.88) 46%, rgba(244, 239, 228, 0.42) 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-block: 26px 40px;
}

.page-about .about-hero__lead {
  min-width: 0;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: var(--hair);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 11px 0;
  border-bottom: var(--hair);
}

.page-about .about-hero__num {
  flex: 0 0 auto;
  min-width: 88px;
  font-size: 19px;
  font-weight: 700;
  color: var(--green);
  border-bottom: 1px solid var(--green-soft);
  padding-bottom: 2px;
}

.page-about .about-hero__label {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

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

/* 媒体容器统一处理 */
.page-about .bao-media {
  margin: 0;
  padding: 10px;
  background: var(--card);
  border: var(--hair);
}

.page-about .bao-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) contrast(0.96);
}

.page-about .bao-media__cap {
  margin: 10px 2px 2px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
}

/* ============ 主体双栏 ============ */
.page-about .about-body {
  border-bottom: var(--hair);
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-block: 0 56px;
}

.page-about .about-rail {
  padding: 20px 0 16px;
  border-bottom: var(--hair);
  min-width: 0;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 13px;
  border: var(--hair);
  border-radius: var(--r);
  background: var(--card);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--ease), border-color var(--ease), color var(--ease), transform var(--ease);
}

.page-about .about-rail__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lake);
  border-bottom: 1px solid var(--grid);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  background: var(--green);
  border-color: var(--green);
  color: var(--paper);
  transform: translateX(2px);
}

.page-about .about-rail__list a:hover .about-rail__num,
.page-about .about-rail__list a:focus-visible .about-rail__num {
  color: var(--sand);
  border-bottom-color: var(--sand);
}

.page-about .about-rail__list a:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
}

/* ============ 纵向时间轴主线 ============ */
.page-about .about-flow {
  position: relative;
  padding-left: var(--about-flow-gap);
  min-width: 0;
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--green) 0%, var(--green-soft) 16%, var(--grid) 44%, var(--grid) 100%);
}

.page-about .about-sec {
  position: relative;
  padding: 32px 0 26px;
  border-bottom: var(--hair);
}

.page-about .about-sec:last-child {
  border-bottom: 0;
  padding-bottom: 6px;
}

.page-about .about-sec__node {
  position: absolute;
  left: -36px;
  top: 40px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--green);
  box-sizing: border-box;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.page-about .about-sec__index {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  padding: 3px 7px;
  border: var(--hair);
  border-radius: var(--r);
  background: var(--card);
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .about-sec__index.is-in {
  color: var(--green);
  border-color: var(--green-soft);
  background: rgba(127, 164, 105, 0.12);
}

.page-about .about-sec__body p {
  margin: 0 0 14px;
  font-size: 16.5px;
  line-height: 1.78;
  max-width: 64ch;
}

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

.page-about .about-sec__body a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid var(--lake-soft);
  transition: color var(--ease), border-color var(--ease);
}

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

/* 引文 */
.page-about .about-quote {
  margin: 24px 0 4px;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--clay);
}

.page-about .about-quote p {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.6;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-quote cite {
  font-style: normal;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ============ 里程碑时间轴 ============ */
.page-about .about-miles {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.page-about .about-miles__item {
  position: relative;
  padding: 0 0 28px 22px;
  border-left: 1px solid var(--grid);
}

.page-about .about-miles__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-miles__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--green);
  box-sizing: border-box;
  transition: transform var(--ease), background-color var(--ease);
}

.page-about .about-miles__item:nth-child(-n + 3)::before,
.page-about .about-miles__item:nth-child(n + 5)::before {
  background: var(--green);
}

.page-about .about-miles__item:hover::before {
  transform: scale(1.35);
}

.page-about .about-miles__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0 0 6px;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--lake);
}

.page-about .about-miles__meta span {
  border-bottom: 1px solid var(--grid);
  padding-bottom: 2px;
}

.page-about .about-miles__item h3 {
  margin: 0 0 6px;
}

.page-about .about-miles__item p:not(.about-miles__meta) {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 62ch;
}

.page-about .about-miles__item--media {
  padding-bottom: 28px;
}

.page-about .about-miles__item--media::before {
  display: none;
}

.page-about .about-miles__figure {
  margin: 0;
}

.page-about .about-miles__figure .bao-media__cap {
  margin-top: 8px;
}

/* ============ 服务网络 SVG ============ */
.page-about .about-net {
  margin: 20px 0 0;
  padding: 14px;
  background: var(--card);
  border: var(--hair);
}

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

.page-about .about-net__dot {
  fill: var(--green-soft);
  stroke: var(--paper);
  stroke-width: 2.5;
  transform-box: fill-box;
  transform-origin: center;
  transition: fill var(--ease), transform var(--ease);
}

.page-about .about-net__dot:hover {
  fill: var(--sand);
  transform: scale(1.7);
}

.page-about .about-net__dot--key {
  fill: var(--lake);
}

.page-about .about-net__dot--key:hover {
  fill: var(--sand);
}

.page-about .about-net .bao-media__cap {
  margin: 10px 2px 0;
}

/* ============ 会员权益三档 ============ */
.page-about .about-tiers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-tier {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 18px 16px 20px;
  background: var(--card);
  border: var(--hair);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .about-tier:hover {
  border-color: var(--green-soft);
  transform: translateY(-2px);
}

.page-about .about-tier__code {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-about .about-tier h3 {
  margin: 0;
}

.page-about .about-tier__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-tier__list {
  list-style: none;
  margin: 4px 0 0;
  padding: 10px 0 0;
  border-top: var(--hair);
  display: grid;
  gap: 8px;
}

.page-about .about-tier__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-tier__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 1px;
  background: var(--green);
}

.page-about .about-tier--brand {
  background: var(--forest);
  border-color: var(--forest);
}

.page-about .about-tier--brand h3 {
  color: var(--paper);
}

.page-about .about-tier--brand .about-tier__code {
  color: var(--sand);
}

.page-about .about-tier--brand .about-tier__desc {
  color: rgba(244, 239, 228, 0.78);
}

.page-about .about-tier--brand .about-tier__list {
  border-top-color: rgba(244, 239, 228, 0.22);
}

.page-about .about-tier--brand .about-tier__list li {
  color: rgba(244, 239, 228, 0.9);
}

.page-about .about-tier--brand .about-tier__list li::before {
  background: var(--sand);
}

.page-about .about-tier__note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 64ch;
}

/* ============ 团队与资质 ============ */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 20px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--hair);
}

.page-about .about-team__list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 0;
  border-bottom: var(--hair);
}

.page-about .about-team__num {
  flex: 0 0 auto;
  min-width: 92px;
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  border-bottom: 1px solid var(--green-soft);
  padding-bottom: 2px;
}

.page-about .about-team__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .about-team__figure {
  margin: 0;
}

/* ============ 收尾 ============ */
.page-about .about-next {
  background: var(--card);
  border-bottom: var(--hair);
}

.page-about .about-next__inner {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-block: 32px 36px;
}

.page-about .about-next__text {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 52ch;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-next__links .bao-btn {
  text-decoration: none;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-about .about-hero__inner {
    padding-block: 34px 52px;
  }

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

  .page-about .about-next__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding-block: 30px 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero__facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 20px;
    border-top: var(--hair);
  }

  .page-about .about-hero__facts li {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 14px 0;
  }

  .page-about .about-hero__num {
    min-width: 0;
    font-size: 21px;
  }

  .page-about .about-body__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 0 56px;
    padding-block: 46px 72px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    align-self: start;
    padding: 0;
    border-bottom: 0;
  }

  .page-about .about-rail__title {
    padding-bottom: 10px;
    border-bottom: var(--hair);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-rail__list a {
    width: 100%;
    padding: 10px 10px 10px 12px;
    border: 0;
    border-left: 2px solid var(--grid);
    border-radius: 0;
    background: transparent;
    font-size: 13.5px;
    justify-content: flex-start;
    transition: background-color var(--ease), border-color var(--ease), color var(--ease), transform var(--ease);
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    background: var(--card);
    border-left-color: var(--green);
    color: var(--green);
    transform: translateX(2px);
  }

  .page-about .about-rail__list a:hover .about-rail__num,
  .page-about .about-rail__list a:focus-visible .about-rail__num {
    color: var(--clay);
    border-bottom-color: var(--clay);
  }

  .page-about .about-sec {
    padding: 40px 0 30px;
  }

  .page-about .about-sec__node {
    left: -39px;
    top: 48px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-net {
    padding: 20px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-flow {
    --about-flow-gap: 40px;
  }

  .page-about .about-sec__node {
    left: -45px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tier:hover,
  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible,
  .page-about .about-miles__item:hover::before,
  .page-about .about-net__dot:hover {
    transform: none;
  }
}