.page-about {
  --about-rail: 212px;
  --about-panel-pad: 28px;
  background: var(--dc-porcelain);
  color: var(--dc-brown);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 56px;
  color: var(--dc-porcelain);
  background:
    linear-gradient(rgba(44, 90, 73, .48) 1px, transparent 1px) 0 0 / 100% 88px,
    linear-gradient(90deg, rgba(44, 90, 73, .48) 1px, transparent 1px) 0 0 / 88px 100%,
    radial-gradient(120% 90% at 88% 6%, rgba(217, 162, 43, .22), transparent 62%),
    var(--dc-ink);
  border-bottom: 1px solid var(--dc-amber);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 16px;
  position: relative;
}

.page-about .about-crumb {
  color: rgba(247, 243, 233, .7);
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-about .about-crumb a {
  color: rgba(247, 243, 233, .7);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--dc-amber-bright);
}

.page-about .about-hero__annot {
  color: var(--dc-amber);
  margin: 4px 0 0;
}

.page-about .about-hero__title {
  margin: 4px 0 0;
  max-width: 20ch;
  color: var(--dc-porcelain);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  color: rgba(247, 243, 233, .86);
}

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

.page-about .about-stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid rgba(217, 162, 43, .45);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-stats__num {
  display: block;
  font-size: 30px;
  line-height: 1;
  color: var(--dc-amber-bright);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(247, 243, 233, .72);
}

.page-about .about-hero__side {
  display: none;
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 36px 0 68px;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__side {
    display: block;
    position: absolute;
    top: 40px;
    right: 24px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .22em;
    color: rgba(240, 197, 102, .8);
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .about-layout {
  padding-top: 40px;
  padding-bottom: 8px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 56px;
    padding-top: 56px;
  }
}

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

/* ---------- 左侧章节轴 ---------- */
.page-about .about-rail {
  display: none;
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    display: block;
    align-self: start;
    position: sticky;
    top: calc(var(--dc-header-h) + 32px);
  }
}

.page-about .about-rail__label {
  margin: 0 0 14px;
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--dc-gray);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--dc-line);
}

.page-about .about-rail__item {
  position: relative;
  padding: 9px 0;
}

.page-about .about-rail__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 15px;
  width: 9px;
  height: 9px;
  background: var(--dc-porcelain);
  border: 1px solid var(--dc-amber);
  transform: rotate(45deg);
  transition: background-color .2s var(--dc-ease);
}

.page-about .about-rail__item:hover::before {
  background: var(--dc-amber);
}

.page-about .about-rail__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.5;
  color: var(--dc-gray);
  text-decoration: none;
  transition: color .2s var(--dc-ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--dc-brown);
}

.page-about .about-rail__num {
  font-size: 11px;
  color: var(--dc-amber);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  position: relative;
  border-top: 1px solid var(--dc-line);
  padding: 36px 0 52px;
}

.page-about .about-chapter:first-child {
  border-top: none;
  padding-top: 8px;
}

.page-about .about-chapter__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--dc-amber);
}

.page-about .about-chapter__title {
  margin: 8px 0 0;
  max-width: 24ch;
}

.page-about .about-chapter__lede {
  margin: 14px 0 0;
}

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

.page-about .about-block p {
  margin: 0 0 1.1em;
}

.page-about .about-block--narrow {
  max-width: 60ch;
}

.page-about .about-pull {
  margin: 28px 0 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--dc-amber);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.6;
  max-width: 26ch;
  color: var(--dc-brown);
}

/* 面板型章节（纸底 / 墨绿底） */
.page-about .about-chapter--panel {
  margin-inline: calc(-1 * var(--dc-gutter));
  padding-inline: var(--dc-gutter);
  border-top: none;
}

.page-about .about-chapter--paper {
  background: var(--dc-paper);
  border-top: 1px solid var(--dc-line);
  border-bottom: 1px solid var(--dc-line);
}

.page-about .about-chapter--felt {
  background: var(--dc-felt);
  color: var(--dc-porcelain);
  border-bottom: 1px solid var(--dc-felt-line);
}

.page-about .about-felt__annot {
  margin: 0 0 10px;
  color: var(--dc-amber);
}

.page-about .about-felt__title {
  color: var(--dc-porcelain);
}

.page-about .about-felt__lede {
  color: rgba(247, 243, 233, .82);
}

.page-about .about-felt__foot {
  margin: 26px 0 0;
  font-size: 15px;
  color: rgba(247, 243, 233, .82);
}

@media (min-width: 720px) {
  .page-about .about-chapter {
    padding: 48px 0 68px;
  }
  .page-about .about-chapter--panel {
    padding-inline: var(--about-panel-pad);
  }
  .page-about .about-chapter:first-child {
    padding-top: 12px;
  }
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: 26px 0 0;
}

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

.page-about .about-media--felt img {
  border-color: var(--dc-felt-line);
}

.page-about .about-media__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--dc-gray);
}

.page-about .about-media--felt .about-media__cap {
  color: rgba(247, 243, 233, .68);
}

@media (min-width: 860px) {
  .page-about .about-media--half {
    max-width: 62%;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--dc-line);
  border: 1px solid var(--dc-line);
}

.page-about .about-team__item {
  background: var(--dc-porcelain);
  padding: 20px 18px 22px;
  transition: background-color .24s var(--dc-ease), transform .24s var(--dc-ease);
}

.page-about .about-team__item:hover {
  background: #fffdf7;
  transform: translateY(-2px);
}

.page-about .about-team__num {
  margin: 0;
  font-size: 26px;
  line-height: 1;
  color: var(--dc-amber);
}

.page-about .about-team__name {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .about-team__duty {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dc-gray);
}

.page-about .about-team__out {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--dc-line-soft);
  font-family: var(--dc-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--dc-cool);
}

.page-about .about-note {
  margin: 22px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--dc-amber);
  background: rgba(217, 162, 43, .1);
  font-size: 14px;
  line-height: 1.75;
}

@media (min-width: 700px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 指引流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  counter-reset: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--dc-line-soft);
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 0 20px 46px;
  border-bottom: 1px solid var(--dc-line-soft);
}

.page-about .about-flow__idx {
  position: absolute;
  left: 0;
  top: 22px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--dc-amber);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-flow__step p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dc-gray);
  max-width: 56ch;
}

@media (min-width: 860px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
  .page-about .about-flow__step:last-child {
    border-bottom: none;
  }
}

/* ---------- 对照表 ---------- */
.page-about .about-table-wrap {
  margin-top: 26px;
  border: 1px solid var(--dc-line);
  overflow-x: auto;
}

.page-about .about-table {
  width: 100%;
  min-width: 660px;
  border-collapse: collapse;
  font-size: 15px;
  background: var(--dc-porcelain);
}

.page-about .about-table__cap {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--dc-gray);
  background: var(--dc-paper);
  border-bottom: 1px solid var(--dc-line);
}

.page-about .about-table thead th {
  background: var(--dc-paper);
  color: var(--dc-brown);
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 11px 14px;
  border-bottom: 1px solid var(--dc-line);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  text-align: left;
  font-weight: 600;
  padding: 14px;
  border-bottom: 1px solid var(--dc-line-soft);
  white-space: nowrap;
}

.page-about .about-table td {
  padding: 14px;
  border-bottom: 1px solid var(--dc-line-soft);
  vertical-align: top;
  line-height: 1.65;
}

.page-about .about-table tbody tr:nth-child(even) {
  background: rgba(124, 140, 132, .1);
}

.page-about .about-table tbody tr:hover {
  background: var(--dc-amber-soft);
}

.page-about .about-link {
  color: var(--dc-cinnabar);
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 35, 44, .4);
  transition: color .2s var(--dc-ease), border-color .2s var(--dc-ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--dc-brown);
  border-color: var(--dc-brown);
}

.page-about .about-link--amber {
  color: var(--dc-amber-bright);
  border-bottom-color: rgba(240, 197, 102, .45);
}

.page-about .about-link--amber:hover,
.page-about .about-link--amber:focus-visible {
  color: var(--dc-porcelain);
  border-color: var(--dc-porcelain);
}

@media (max-width: 719px) {
  .page-about .about-table {
    min-width: 0;
  }
  .page-about .about-table thead {
    display: none;
  }
  .page-about .about-table tbody tr {
    display: block;
    padding: 14px;
    border-bottom: 1px solid var(--dc-line);
  }
  .page-about .about-table tbody tr:nth-child(even) {
    background: rgba(124, 140, 132, .08);
  }
  .page-about .about-table tbody th {
    display: block;
    padding: 0 0 10px;
    border-bottom: none;
    font-size: 16px;
  }
  .page-about .about-table td {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 10px;
    padding: 5px 0;
    border-bottom: none;
    font-size: 14px;
  }
  .page-about .about-table td::before {
    content: attr(data-label);
    font-family: var(--dc-mono);
    font-size: 11px;
    color: var(--dc-gray);
    padding-top: 3px;
  }
}

/* ---------- 分段切换 ---------- */
.page-about .about-tabs {
  margin-top: 30px;
}

.page-about .about-tabs__label {
  margin: 0 0 12px;
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--dc-gray);
}

.page-about .about-tabs .dc-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-panel {
  margin-top: 18px;
  padding: 18px 16px;
  border: 1px solid var(--dc-line);
  background: #fffdf7;
}

.page-about .about-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  max-width: 60ch;
}

.page-about .about-panel__list {
  margin: 14px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 9px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dc-gray);
}

/* ---------- 时间线（墨绿底） ---------- */
.page-about .about-time {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-time::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--dc-amber), rgba(217, 162, 43, .25));
}

.page-about .about-time__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-time__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 4px;
  width: 11px;
  height: 11px;
  background: var(--dc-felt);
  border: 2px solid var(--dc-amber);
  transform: rotate(45deg);
}

.page-about .about-time__when {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--dc-amber-bright);
}

.page-about .about-time__title {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--dc-porcelain);
}

.page-about .about-time__body {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 243, 233, .78);
  max-width: 56ch;
}

@media (min-width: 900px) {
  .page-about .about-time {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

/* ---------- 共建方 ---------- */
.page-about .about-partners {
  margin-top: 26px;
  display: grid;
  gap: 1px;
  background: var(--dc-line);
  border: 1px solid var(--dc-line);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-partners__item {
  background: var(--dc-porcelain);
  padding: 22px 18px 24px;
}

.page-about .about-partners__tag {
  margin: 0;
  color: var(--dc-amber);
}

.page-about .about-partners__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-partners__item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dc-gray);
}

@media (min-width: 860px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: 24px;
  padding: 44px 0 52px;
  color: var(--dc-porcelain);
  background:
    linear-gradient(90deg, rgba(217, 162, 43, .2) 1px, transparent 1px) 0 0 / 96px 100%,
    var(--dc-ink);
  border-top: 1px solid var(--dc-amber);
}

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

.page-about .about-cta__annot {
  margin: 0;
  color: var(--dc-amber);
}

.page-about .about-cta__title {
  margin: 0;
  max-width: 22ch;
  color: var(--dc-porcelain);
}

.page-about .about-cta__lede {
  margin: 0;
  color: rgba(247, 243, 233, .84);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-cta__contact {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(247, 243, 233, .66);
}

.page-about .about-cta__contact .dc-num {
  color: var(--dc-amber-bright);
  font-size: 13px;
}

@media (min-width: 900px) {
  .page-about .about-cta {
    padding: 56px 0 64px;
  }
}