.page-about {
  --about-rail-w: 208px;
  background: var(--ink);
  color: var(--white);
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
}
.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}
.page-about .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
}
.page-about .breadcrumbs a:hover {
  color: var(--lime);
}
.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(147, 162, 154, .55);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 40px) 0 clamp(32px, 5vw, 60px);
}
.page-about .about-hero__kicker {
  margin: 0 0 clamp(14px, 3vw, 26px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}
.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(34px, 8vw, 100px);
  line-height: 1;
  letter-spacing: -.03em;
  font-weight: 900;
}
.page-about .about-hero__accent {
  display: block;
  color: var(--lime);
  margin-top: .06em;
}
.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: rgba(255, 255, 255, .82);
}

/* ---------- 外壳：左索引 + 右叙事 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  border-top: 1px solid var(--line-dark);
  padding-top: clamp(20px, 3vw, 36px);
}

/* 移动端：横向胶囊索引 */
.page-about .about-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 4px;
}
.page-about .about-rail::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail__label {
  display: none;
}
.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-rail__list a {
  display: block;
  white-space: nowrap;
  padding: 7px 14px;
  border: 1px solid var(--line-dark);
  border-radius: var(--r-pill);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-rail__list a:hover {
  color: var(--lime);
  border-color: rgba(198, 242, 78, .55);
}

/* 桌面端：左侧粘性竖排索引 */
@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 80px);
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-rail__label {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    color: var(--muted);
  }
  .page-about .about-rail__list {
    display: block;
  }
  .page-about .about-rail__list li + li {
    margin-top: 10px;
  }
  .page-about .about-rail__list a {
    border: 0;
    border-left: 1px solid var(--line-dark);
    border-radius: 0;
    padding: 2px 0 2px 14px;
    white-space: normal;
    font-size: 13px;
    line-height: 1.55;
    transition: color .2s var(--ease), border-color .2s var(--ease);
  }
  .page-about .about-rail__list a:hover {
    border-left-color: var(--lime);
  }
}

/* ---------- 叙事区块 ---------- */
.page-about .about-flow {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  min-width: 0;
}
.page-about .about-block {
  position: relative;
  overflow: hidden;
  min-width: 0;
  border-radius: var(--r-lg);
  padding: clamp(22px, 4vw, 52px);
}
.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-block--panel {
  background: var(--panel);
  border: 1px solid var(--line-dark);
}
.page-about .about-block__num {
  position: absolute;
  top: -.2em;
  right: .04em;
  font-family: var(--font-mono);
  font-size: clamp(88px, 17vw, 176px);
  line-height: 1;
  font-weight: 700;
  color: rgba(198, 242, 78, .07);
  pointer-events: none;
  user-select: none;
}
.page-about .about-block--paper .about-block__num {
  color: rgba(14, 21, 18, .06);
}
.page-about .about-block .eyebrow,
.page-about .about-continue .eyebrow {
  position: relative;
  z-index: 1;
}
.page-about .about-block--paper .eyebrow {
  color: var(--brick);
}
.page-about .about-block h2,
.page-about .about-continue h2 {
  position: relative;
  z-index: 1;
  margin: 10px 0 0;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 900;
  max-width: 18em;
}
.page-about .about-prose {
  position: relative;
  z-index: 1;
  margin: clamp(16px, 2vw, 22px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
}
.page-about .about-block--paper .about-prose {
  color: var(--ink);
}
.page-about .about-block--panel .about-prose {
  color: rgba(255, 255, 255, .84);
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 30px);
  align-items: start;
}
@media (min-width: 780px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
  .page-about .about-split--flow {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
  }
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
}
.page-about .about-figure--wide {
  margin-top: clamp(24px, 3vw, 34px);
}
.page-about .media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--panel-2);
}
.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 70px rgba(14, 21, 18, .6);
  pointer-events: none;
}
.page-about .media__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(14, 21, 18, .74);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}
.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}
.page-about .about-block--paper .about-figure__cap {
  color: var(--muted-paper);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: rgba(198, 242, 78, .3);
}
.page-about .about-timeline li {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 28px) 30px;
}
.page-about .about-timeline li:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 242, 78, .14);
}
.page-about .about-timeline__stage {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--lime);
}
.page-about .about-timeline h3 {
  margin: 8px 0 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.4;
  font-weight: 800;
}
.page-about .about-timeline p {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .72);
}

/* ---------- 生产流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}
.page-about .about-steps__n {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  flex: none;
}
.page-about .about-steps h3 {
  margin: 3px 0 0;
  font-size: 16px;
  line-height: 1.4;
  letter-spacing: -.01em;
  font-weight: 800;
}
.page-about .about-steps p {
  margin: 7px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted-paper);
}

/* ---------- 团队面板 ---------- */
.page-about .about-team {
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 30px);
}
.page-about .about-team__item {
  border: 1px solid var(--line-dark);
  border-radius: var(--r-md);
  background: var(--panel-2);
  overflow: hidden;
}
.page-about .about-team__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
}
.page-about .about-team__item summary::-webkit-details-marker {
  display: none;
}
.page-about .about-team__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-team__item[open] summary::after {
  content: "−";
}
.page-about .about-team__count {
  padding: 3px 10px;
  border-radius: var(--r-pill);
  background: var(--lime-soft);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .04em;
}
.page-about .about-team__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-dark);
  margin-top: 2px;
  padding-top: 14px;
}
.page-about .about-team__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .76);
}

/* ---------- 三件坚持 ---------- */
.page-about .about-promise {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 780px) {
  .page-about .about-promise {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-promise li {
  background: var(--paper-2);
  border-radius: var(--r-md);
  padding: clamp(18px, 2.4vw, 24px);
}
.page-about .about-promise h3 {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.45;
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-promise p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted-paper);
}

/* ---------- 继续浏览 ---------- */
.page-about .about-continue {
  padding-top: clamp(10px, 2vw, 18px);
}
.page-about .about-next-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
}
@media (min-width: 720px) {
  .page-about .about-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .about-next {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-dark);
  border-radius: var(--r-lg);
  background: var(--panel);
  color: var(--white);
  text-decoration: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-next:hover {
  border-color: rgba(198, 242, 78, .6);
  background: var(--panel-2);
}
.page-about .about-next__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lime);
}
.page-about .about-next strong {
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-next__more {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}
.page-about .about-continue__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .about-continue__foot a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 242, 78, .35);
}
.page-about .about-continue__foot a:hover {
  border-bottom-color: var(--lime);
}