.page-about {
  --about-rail: 120px;
  background: var(--ink);
  color: var(--silver);
  padding-top: 0;
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-top: calc(var(--header-h) + 20px);
}

.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--silver);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--stone);
}

.page-about .crumbs a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .crumbs [aria-current="page"] {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(48px, 8vw, 96px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 76%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero-copy h1 {
  margin: 18px 0 0;
  font-size: clamp(36px, 8vw, 82px);
  line-height: 1.03;
  letter-spacing: -.04em;
  font-weight: 800;
  color: var(--bone);
}

.page-about .about-hero-copy h1::after {
  content: "";
  display: block;
  width: clamp(56px, 12vw, 120px);
  height: 4px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--lime);
}

.page-about .about-hero-lede {
  position: relative;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding-top: 20px;
  max-width: 30em;
  font-size: clamp(16px, 2.1vw, 20px);
  line-height: 1.7;
  color: var(--bone);
}

.page-about .about-hero-lede::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 1px;
  background: var(--lime);
}

.page-about .about-hero-body {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-hero-visual {
  margin: 0;
}

.page-about .media-frame {
  overflow: hidden;
  background: var(--pitch);
  border: 1px solid var(--line);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figcap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: .08em;
  color: var(--stone);
}

/* ---------- 章节头 ---------- */

.page-about .section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-bottom: clamp(18px, 3vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-about .section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .about-head-copy h2 {
  margin: 0;
  font-size: clamp(25px, 4.4vw, 42px);
  line-height: 1.16;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--bone);
}

.page-about .about-head-copy p {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

/* ---------- 01 出发点 ---------- */

.page-about .about-why-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 54px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-why-quote {
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-strong);
  font-size: clamp(19px, 2.9vw, 27px);
  line-height: 1.5;
  color: var(--bone);
}

.page-about .about-why-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-why-body p + p {
  margin-top: 16px;
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.page-about .about-figures li {
  padding: 20px 14px 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-fig-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1.05;
  letter-spacing: -.03em;
  color: var(--lime);
}

.page-about .about-fig-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 02 资料库历程 ---------- */

.page-about .about-archive-lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 42px);
  align-items: start;
}

.page-about .about-archive-lead .prose p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-archive-visual {
  margin: 0;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(36px, 6vw, 68px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 24px 0 24px 20px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .about-tl-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 30px;
  width: 7px;
  height: 7px;
  background: var(--lime);
}

.page-about .about-tl-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .about-tl-season {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-about .about-tl-title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.3vw, 21px);
  line-height: 1.45;
  letter-spacing: -.015em;
  color: var(--bone);
}

.page-about .about-tl-body p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 03 生产流程 ---------- */

.page-about .about-make-intro {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-make-intro p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-tabs {
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .about-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-tabs .tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 14px 18px 14px 0;
  margin-right: 14px;
  font-family: var(--font-sans);
  font-size: 15px;
  letter-spacing: -.005em;
  color: var(--silver);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-tabs .tab:hover {
  color: var(--bone);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-tabs .tab:focus-visible {
  outline: 1px solid var(--lime);
  outline-offset: -4px;
}

.page-about .about-tabs .tab-panel {
  padding: clamp(24px, 4vw, 42px) 0 0;
}

.page-about .about-tabs .tab-panel[hidden] {
  display: none;
}

.page-about .about-part {
  display: grid;
  gap: 12px;
  max-width: 60ch;
  padding-left: 20px;
  border-left: 2px solid var(--lime);
}

.page-about .about-part-idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--lava);
}

.page-about .about-part h3 {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--bone);
}

.page-about .about-part p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-part-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-part-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-part-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--lime);
}

/* ---------- 04 团队 ---------- */

.page-about .about-team-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 42px);
  align-items: start;
}

.page-about .about-team-top .prose p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-team-visual {
  margin: 0;
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-about .about-team-col {
  position: relative;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team-col::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 2px;
  background: var(--lime);
  transition: width .3s var(--ease);
}

.page-about .about-team-col:hover::before,
.page-about .about-team-col:focus-within::before {
  width: 52px;
}

.page-about .about-team-idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--lime);
}

.page-about .about-team-role {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--bone);
}

.page-about .about-team-count {
  margin: 6px 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--lava);
}

.page-about .about-team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-team-duties {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
  opacity: .55;
  transition: opacity .24s var(--ease);
}

.page-about .about-team-col:hover .about-team-duties,
.page-about .about-team-col:focus-within .about-team-duties {
  opacity: 1;
}

.page-about .about-team-duties li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--bone);
}

.page-about .about-team-duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 1px;
  background: var(--stone);
}

/* ---------- 05 合作与认可 ---------- */

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin-top: clamp(28px, 5vw, 52px);
  border-top: 1px solid var(--line);
}

.page-about .about-eco-block {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-eco-num {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 7vw, 70px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--lime);
}

.page-about .about-eco-unit {
  margin: 6px 0 14px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
}

.page-about .about-eco-text {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-honors {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-honors li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-honor-mark {
  width: 8px;
  height: 8px;
  background: var(--clay);
  transform: translateY(-1px);
}

.page-about .about-honors li:first-child .about-honor-mark {
  background: var(--lime);
}

.page-about .about-honor-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--bone);
}

.page-about .about-honor-kind {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--stone);
  white-space: nowrap;
}

/* ---------- 06 跨端与服务 ---------- */

.page-about .about-serve-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-devices {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-devices li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-dev-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-dev-name {
  font-size: 17px;
  letter-spacing: -.015em;
  color: var(--bone);
}

.page-about .about-dev-note {
  grid-column: 2;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-serve-quote {
  margin: 0 0 20px;
  padding-left: 18px;
  border-left: 2px solid var(--lava);
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.5;
  color: var(--bone);
}

.page-about .about-serve-body .prose p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-serve-body .prose p + p {
  margin-top: 16px;
}

/* ---------- 结尾行动 ---------- */

.page-about .about-next {
  background: var(--moss);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-next-grid h2 {
  margin: 14px 0 0;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.18;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--bone);
}

.page-about .about-next-grid .prose p {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-figures li {
    padding: 22px 18px 22px 0;
  }

  .page-about .about-figures li + li {
    border-left: 1px solid var(--line);
    padding-left: 20px;
  }
}

@media (min-width: 760px) {
  .page-about .section-head {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0 24px;
    align-items: start;
  }

  .page-about .about-tl-item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 0 32px;
    padding: 30px 0;
    border-left: 0;
  }

  .page-about .about-tl-item::before {
    left: calc(var(--about-rail) - 4px);
    top: 34px;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: calc(var(--about-rail) - .5px);
    top: 2px;
    bottom: 2px;
    width: 1px;
    background: var(--line);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-archive-lead {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
  }

  .page-about .about-team-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

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

  .page-about .about-team-col {
    padding: 30px 26px 34px 0;
  }

  .page-about .about-team-col + .about-team-col {
    border-left: 1px solid var(--line);
    padding-left: 26px;
  }

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

  .page-about .about-eco-block {
    padding: 30px 30px 34px 0;
  }

  .page-about .about-eco-block + .about-eco-block {
    border-left: 1px solid var(--line);
    padding-left: 30px;
  }

  .page-about .about-serve-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team-col {
    padding-right: 36px;
  }

  .page-about .about-team-col + .about-team-col {
    padding-left: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}