.page-about {
  --about-axis-w: 172px;
  --about-gap: clamp(28px, 5vw, 76px);
  color: var(--fog);
  font-family: var(--font-body);
}

.page-about .breadcrumb {
  margin: 0;
  padding-top: clamp(18px, 3vw, 32px);
  padding-bottom: clamp(12px, 2vw, 20px);
}

.page-about .breadcrumb-list {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .breadcrumb-link {
  color: var(--fog-dim);
  text-decoration: none;
}

.page-about .breadcrumb-link:hover {
  color: var(--cyan);
}

.page-about .breadcrumb-current {
  color: var(--fog);
}

/* ---------- 首屏框景窗口 ---------- */

.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(22px, 3.4vw, 52px);
  border: 1px solid var(--line);
  background-color: var(--graphite);
  background-image:
    linear-gradient(rgba(36, 28, 58, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 28, 58, 0.5) 1px, transparent 1px),
    linear-gradient(155deg, rgba(122, 59, 255, 0.2), transparent 62%);
  background-size: 72px 72px, 72px 72px, 100% 100%;
  overflow: hidden;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
}

.page-about .about-hero__meta {
  grid-area: meta;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__stamp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  border: 1px solid rgba(255, 193, 99, 0.45);
  padding: 4px 10px;
  white-space: nowrap;
}

.page-about .about-hero__title {
  grid-area: title;
  margin: 22px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--fog);
  text-shadow: 0 0 30px rgba(122, 59, 255, 0.45);
  overflow-wrap: anywhere;
}

.page-about .about-hero__lede {
  grid-area: lede;
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--fog-dim);
}

.page-about .about-hero__figure {
  grid-area: fig;
  margin: 24px 0 0;
  border: 1px solid var(--line);
  background: var(--abyss);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 主体：坐标轴 + 连续画布 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: clamp(48px, 8vw, 108px);
}

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

.page-about .about-axis__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--fog-dim);
  padding-bottom: 10px;
}

.page-about .about-axis__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-axis__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  color: var(--fog-dim);
  text-decoration: none;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: color 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .about-axis__link:hover,
.page-about .about-axis__link:focus-visible {
  color: var(--cyan);
  border-color: rgba(47, 243, 216, 0.55);
}

.page-about .about-axis__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
}

.page-about .about-axis__link:hover .about-axis__num {
  color: var(--cyan);
}

.page-about .about-axis__txt {
  font-size: 13px;
}

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

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  scroll-margin-top: 120px;
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-sec:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2vw, 26px);
  margin-bottom: 20px;
}

.page-about .about-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--violet);
  border-bottom: 1px solid var(--violet);
  padding-bottom: 3px;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-sec__lead {
  margin: 0 0 24px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--fog-dim);
}

.page-about .about-sec__body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-dim);
}

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

.page-about .about-sec__body p:first-child {
  color: var(--fog);
  font-size: 17px;
}

.page-about .about-sec__tail {
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 16px;
  line-height: 1.8;
  color: var(--fog-dim);
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 216, 0.45);
  padding-bottom: 1px;
  transition: color 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .about-inline-link:hover {
  color: var(--fog);
  border-color: var(--fog);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  padding: 6px 0 0;
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  z-index: 0;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 22%, #000 78%, transparent);
  pointer-events: none;
}

.page-about .about-timeline__list {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 0 18px 2px;
  border-top: 1px solid var(--line);
  transition: border-color 0.32s var(--ease);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--violet);
  transition: width 0.32s var(--ease), background-color 0.32s var(--ease);
}

.page-about .about-timeline__item:hover {
  border-top-color: rgba(47, 243, 216, 0.5);
}

.page-about .about-timeline__item:hover::after {
  width: 62px;
  background: var(--cyan);
}

.page-about .about-timeline__item--current {
  border-top-color: var(--violet);
  background: linear-gradient(90deg, rgba(122, 59, 255, 0.16), transparent 72%);
}

.page-about .about-timeline__item--current::after {
  width: 74px;
  background: var(--magenta);
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--amber);
  padding-top: 1px;
}

.page-about .about-timeline__txt {
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog-dim);
}

.page-about .about-timeline__item--current .about-timeline__txt {
  color: var(--fog);
}

/* ---------- 团队表格 ---------- */

.page-about .about-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
}

.page-about .about-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 15px;
}

.page-about .about-table__caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fog-dim);
  border-bottom: 1px solid var(--line);
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  vertical-align: top;
  padding: 15px 16px;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.7;
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--violet);
  background: rgba(36, 28, 58, 0.5);
  border-bottom: 1px solid var(--line);
}

.page-about .about-table tbody th {
  font-weight: 700;
  color: var(--fog);
  font-size: 15px;
}

.page-about .about-table tbody td {
  color: var(--fog-dim);
}

.page-about .about-table tbody tr {
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-table tbody tr:hover {
  background: rgba(122, 59, 255, 0.12);
  box-shadow: inset 1px 0 0 var(--cyan), inset -1px 0 0 var(--cyan);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: none;
}

.page-about .about-table th:nth-child(1),
.page-about .about-table td:nth-child(1) {
  width: 23%;
}

.page-about .about-table th:nth-child(2),
.page-about .about-table td:nth-child(2) {
  width: 45%;
}

.page-about .about-table th:nth-child(3),
.page-about .about-table td:nth-child(3) {
  width: 32%;
}

/* ---------- 内容产出流程 ---------- */

.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-flow__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--graphite);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-flow__cap {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--fog-dim);
  border-top: 1px solid var(--line);
}

.page-about .about-flow__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0 0 20px 0;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 18px;
}

.page-about .about-flow__step:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-flow__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-flow__name {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog-dim);
}

/* ---------- 合作与投稿 ---------- */

.page-about .about-partner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 26px;
}

.page-about .about-partner__col {
  padding: 22px 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(36, 28, 58, 0.55), transparent);
}

.page-about .about-partner__col--accent {
  border-left: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(47, 243, 216, 0.1), transparent 80%);
}

.page-about .about-partner__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog-dim);
}

.page-about .about-partner__list li:last-child {
  margin-bottom: 0;
}

.page-about .about-partner__list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 8px;
  height: 1px;
  background: var(--violet);
}

.page-about .about-partner__list strong {
  color: var(--fog);
  font-weight: 700;
  margin-right: 4px;
}

.page-about .about-partner__foot {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-dim);
}

/* ---------- 运营数字 ---------- */

.page-about .about-metrics {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-metric {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: border-color 0.3s var(--ease);
}

.page-about .about-metric:hover {
  border-bottom-color: var(--violet);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 60px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fog);
  text-shadow: 0 0 26px rgba(122, 59, 255, 0.5);
}

.page-about .about-metric__unit {
  font-size: 0.42em;
  color: var(--cyan);
  margin-left: 4px;
  letter-spacing: 0;
}

.page-about .about-metric__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-metric__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog-dim);
}

/* ---------- 结尾行动带 ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(122, 59, 255, 0.18), rgba(6, 5, 10, 0.9) 58%);
  padding: clamp(30px, 5vw, 56px) 0;
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.6;
  color: var(--fog);
}

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

/* ---------- 桌面栅格 ---------- */

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    grid-template-areas:
      "meta meta"
      "title fig"
      "lede fig";
    column-gap: clamp(24px, 3vw, 52px);
    align-items: start;
  }

  .page-about .about-hero__figure {
    margin-top: 22px;
    align-self: stretch;
  }

  .page-about .about-hero__figure img {
    height: 100%;
    min-height: 240px;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-partner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .page-about .about-cta__text {
    max-width: 46ch;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-axis {
    position: sticky;
    top: 104px;
    align-self: start;
    padding-top: clamp(30px, 5vw, 56px);
    border-right: 1px solid var(--line);
    padding-right: 18px;
  }

  .page-about .about-axis__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-axis__link {
    position: relative;
    padding: 11px 10px 11px 0;
    border: none;
    border-bottom: 1px solid var(--line-soft);
    border-left: 1px solid transparent;
    background: none;
  }

  .page-about .about-axis__link::before {
    content: "";
    position: absolute;
    left: -19px;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--line);
    transition: background-color 0.28s var(--ease), width 0.28s var(--ease);
  }

  .page-about .about-axis__link:hover::before,
  .page-about .about-axis__link:focus-visible::before {
    width: 15px;
    background: var(--cyan);
  }

  .page-about .about-axis__link:hover,
  .page-about .about-axis__link:focus-visible {
    color: var(--cyan);
    border-color: rgba(47, 243, 216, 0.5);
    border-left-color: var(--cyan);
    padding-left: 8px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__title {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}