.page-about {
  --pa-railw: 172px;
  --pa-border: rgba(143, 168, 160, 0.22);
  --pa-border-strong: rgba(143, 168, 160, 0.42);
  background: var(--tm-ink);
  color: var(--tm-paper);
  overflow-x: clip;
}

/* ---------- 页头 ---------- */
.page-about .pa-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--pa-border-strong);
  background: var(--tm-deep);
}

.page-about .pa-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: saturate(0.7) contrast(1.06);
}

.page-about .pa-hero__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 85% at 10% 0%, rgba(53, 240, 208, 0.16) 0%, transparent 58%),
    linear-gradient(180deg, rgba(7, 19, 16, 0.35) 0%, rgba(11, 31, 26, 0.94) 100%);
}

.page-about .pa-hero__inner {
  position: relative;
  max-width: var(--tm-shell);
  margin: 0 auto;
  padding: clamp(56px, 9vw, 118px) var(--tm-gutter) clamp(40px, 5vw, 68px);
}

.page-about .pa-hero .tm-breadcrumb {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-about .pa-hero__title {
  margin: 14px 0 0;
  max-width: 19ch;
  letter-spacing: -0.02em;
  line-height: 1.06;
}

.page-about .pa-hero__lede {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.35vw, 1.14rem);
  line-height: 1.78;
  color: rgba(242, 234, 217, 0.84);
}

/* 章节索引条 */
.page-about .pa-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 20px;
  border-top: 1px solid var(--pa-border);
}

.page-about .pa-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--pa-border);
  background: rgba(7, 19, 16, 0.56);
  color: var(--tm-slate);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 0.18s var(--tm-ease), border-color 0.18s var(--tm-ease), box-shadow 0.18s var(--tm-ease);
}

.page-about .pa-index a:hover,
.page-about .pa-index a:focus-visible {
  color: var(--tm-paper);
  border-color: var(--tm-mint);
  box-shadow: 0 0 0 1px var(--tm-mint-glow), 0 0 20px var(--tm-mint-glow);
  outline: none;
}

.page-about .pa-index__no {
  font-family: var(--tm-font-data);
  font-size: 0.72rem;
  color: var(--tm-mint);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节骨架：窄栏 + 宽栏 ---------- */
.page-about .pa-block {
  padding-block: clamp(38px, 5vw, 68px);
}

.page-about .pa-split {
  max-width: var(--tm-shell);
  margin: 0 auto;
  padding-inline: var(--tm-gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
}

.page-about .pa-rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--pa-border);
}

.page-about .pa-no {
  font-family: var(--tm-font-data);
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--tm-mint);
  font-variant-numeric: tabular-nums;
}

.page-about .pa-roll {
  font-family: var(--tm-font-data);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--tm-amber);
}

.page-about .pa-h2 {
  margin: 0 0 16px;
  max-width: 24ch;
  font-family: var(--tm-font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.7vw, 2.15rem);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--tm-paper);
}

.page-about .pa-lede {
  margin: 0 0 clamp(22px, 3vw, 34px);
  max-width: 64ch;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.78;
  color: rgba(242, 234, 217, 0.8);
}

.page-about .pa-col p {
  line-height: 1.75;
  color: rgba(242, 234, 217, 0.86);
}

.page-about .pa-col h3 {
  margin: 0 0 8px;
  font-family: var(--tm-font-display);
  font-weight: 800;
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  line-height: 1.35;
  color: var(--tm-paper);
}

/* ---------- 01 为谁整理 ---------- */
.page-about .pa-people {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pa-border);
  border: 1px solid var(--pa-border);
}

.page-about .pa-person {
  padding: clamp(18px, 2.4vw, 26px);
  background: linear-gradient(180deg, rgba(30, 74, 61, 0.34), rgba(11, 31, 26, 0.88));
}

.page-about .pa-person__tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--tm-font-data);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--tm-mint);
}

.page-about .pa-person p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.72;
  color: rgba(242, 234, 217, 0.78);
}

/* ---------- 02 时间线 ---------- */
.page-about .pa-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .pa-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--tm-mint) 0%, rgba(53, 240, 208, 0.06) 100%);
}

.page-about .pa-tl {
  position: relative;
  padding: 0 0 clamp(20px, 2.6vw, 30px) 34px;
}

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

.page-about .pa-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--tm-ink);
  border: 1px solid var(--tm-mint);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, 0.1);
}

.page-about .pa-tl__key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--tm-font-data);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--tm-amber);
}

.page-about .pa-tl p {
  margin: 0;
  max-width: 66ch;
  font-size: 0.96rem;
}

/* ---------- 03 分类维度 ---------- */
.page-about .pa-dims {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pa-border);
  border: 1px solid var(--pa-border);
}

.page-about .pa-dim {
  padding: clamp(18px, 2.2vw, 24px);
  background: rgba(11, 31, 26, 0.88);
}

.page-about .pa-dim__no {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 8px;
  border: 1px solid var(--pa-border-strong);
  font-family: var(--tm-font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--tm-mint);
}

.page-about .pa-dim p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.7;
  color: rgba(242, 234, 217, 0.76);
}

/* ---------- 满幅流程数据带 ---------- */
.page-about .pa-band {
  margin: clamp(34px, 5vw, 72px) 0;
  border-top: 1px solid var(--pa-border-strong);
  border-bottom: 1px solid var(--pa-border-strong);
  background:
    repeating-linear-gradient(90deg, rgba(143, 168, 160, 0.07) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, #071310 0%, #0B1F1A 100%);
}

.page-about .pa-band__inner {
  max-width: var(--tm-shell);
  margin: 0 auto;
  padding: clamp(30px, 4vw, 52px) var(--tm-gutter);
}

.page-about .pa-band__kicker {
  margin: 0 0 24px;
  font-family: var(--tm-font-data);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--tm-amber);
}

.page-about .pa-band__grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.page-about .pa-stat {
  padding-left: 16px;
  border-left: 1px solid var(--pa-border-strong);
}

.page-about .pa-stat__num {
  display: block;
  font-family: var(--tm-font-data);
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--tm-mint);
  font-variant-numeric: tabular-nums;
}

.page-about .pa-stat:first-child .pa-stat__num {
  color: var(--tm-flame);
}

.page-about .pa-stat__unit {
  margin-left: 4px;
  font-size: 0.42em;
  color: var(--tm-slate);
}

.page-about .pa-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--tm-slate);
}

/* ---------- 04 流程细节 ---------- */
.page-about .pa-steps {
  border-top: 1px solid var(--pa-border);
}

.page-about .pa-step {
  border-bottom: 1px solid var(--pa-border);
  transition: background 0.18s var(--tm-ease);
}

.page-about .pa-step[open] {
  background: rgba(30, 74, 61, 0.22);
}

.page-about .pa-step > summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 2px;
  cursor: pointer;
  font-family: var(--tm-font-display);
  font-weight: 800;
  font-size: clamp(1rem, 1.5vw, 1.16rem);
  color: var(--tm-paper);
}

.page-about .pa-step > summary::-webkit-details-marker {
  display: none;
}

.page-about .pa-step > summary::marker {
  content: "";
}

.page-about .pa-step > summary:hover {
  color: var(--tm-mint);
}

.page-about .pa-step > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--tm-font-data);
  font-size: 1.1rem;
  color: var(--tm-mint);
}

.page-about .pa-step[open] > summary::after {
  content: "–";
}

.page-about .pa-step__no {
  flex: 0 0 auto;
  font-family: var(--tm-font-data);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--tm-amber);
}

.page-about .pa-step__title {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .pa-step__time {
  flex: 0 0 auto;
  font-family: var(--tm-font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--tm-slate);
  font-variant-numeric: tabular-nums;
}

.page-about .pa-step__body {
  padding: 0 2px 20px 2px;
}

.page-about .pa-step__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(242, 234, 217, 0.8);
}

/* ---------- 05 团队 ---------- */
.page-about .pa-team {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  align-items: start;
}

.page-about .pa-team__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--pa-border);
  border: 1px solid var(--pa-border);
}

.page-about .pa-figure {
  padding: 20px 10px;
  text-align: center;
  background: rgba(7, 19, 16, 0.72);
}

.page-about .pa-figure__num {
  display: block;
  font-family: var(--tm-font-data);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1;
  color: var(--tm-mint);
  font-variant-numeric: tabular-nums;
}

.page-about .pa-figure__label {
  display: block;
  margin-top: 10px;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--tm-slate);
}

.page-about .pa-team__copy {
  border-left: 1px solid var(--pa-border-strong);
  padding-left: clamp(16px, 2.4vw, 26px);
}

.page-about .pa-team__copy ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .pa-team__copy li {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--pa-border);
  font-size: 0.95rem;
  line-height: 1.74;
  color: rgba(242, 234, 217, 0.8);
}

.page-about .pa-team__copy li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .pa-team__copy strong {
  color: var(--tm-amber);
  font-weight: 700;
}

/* ---------- 06 运营历程 ---------- */
.page-about .pa-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pa-border);
  border: 1px solid var(--pa-border);
}

.page-about .pa-track > li {
  padding: clamp(20px, 2.4vw, 26px);
  background: rgba(11, 31, 26, 0.9);
}

.page-about .pa-track__key {
  display: block;
  margin-bottom: 12px;
  font-family: var(--tm-font-data);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--tm-amber);
}

.page-about .pa-track p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(242, 234, 217, 0.78);
}

/* ---------- 配图 ---------- */
.page-about .pa-fig {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
}

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

.page-about .pa-fig--side {
  max-width: 640px;
}

/* ---------- 结尾动作 ---------- */
.page-about .pa-cta {
  margin-top: clamp(38px, 5.5vw, 76px);
  border-top: 1px solid var(--pa-border-strong);
  background: linear-gradient(120deg, rgba(30, 74, 61, 0.52) 0%, rgba(7, 19, 16, 0.96) 78%);
}

.page-about .pa-cta__inner {
  max-width: var(--tm-shell);
  margin: 0 auto;
  padding: clamp(34px, 5vw, 64px) var(--tm-gutter);
}

.page-about .pa-cta h2 {
  margin: 0 0 14px;
  font-family: var(--tm-font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--tm-paper);
}

.page-about .pa-cta p {
  margin: 0;
  max-width: 58ch;
  line-height: 1.75;
  color: rgba(242, 234, 217, 0.82);
}

.page-about .pa-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .pa-people {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .pa-split {
    grid-template-columns: var(--pa-railw) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 62px);
  }

  .page-about .pa-rail {
    position: sticky;
    top: 104px;
    align-self: start;
    flex-direction: row;
    align-items: flex-start;
    gap: 14px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .pa-roll {
    writing-mode: vertical-rl;
    padding-top: 12px;
    letter-spacing: 0.32em;
    border-top: 1px solid var(--pa-border-strong);
  }

  .page-about .pa-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1080px) {
  .page-about .pa-dims {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .pa-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .pa-step > summary {
    flex-wrap: wrap;
    gap: 6px 12px;
  }

  .page-about .pa-step__time {
    flex: 1 1 100%;
    order: 3;
    padding-left: 30px;
  }

  .page-about .pa-team__copy {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--pa-border-strong);
    padding-top: 20px;
  }

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

  .page-about .pa-figure {
    padding: 16px 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .pa-index a,
  .page-about .pa-step {
    transition: none;
  }
}