.page-about {
  --about-hair: rgba(140, 151, 163, .18);
  --about-hair-soft: rgba(140, 151, 163, .1);
  --about-tint: rgba(43, 240, 196, .06);
  --about-warm-line: rgba(43, 240, 196, .34);
  --about-axis: linear-gradient(180deg, var(--cyan) 0%, rgba(43, 240, 196, .5) 42%, rgba(43, 240, 196, .08) 100%);
  display: block;
  padding-bottom: clamp(48px, 8vw, 110px);
  color: var(--warm);
  background:
    radial-gradient(120% 46% at 92% 0%, rgba(43, 240, 196, .07), transparent 62%),
    radial-gradient(80% 40% at 0% 30%, rgba(255, 122, 43, .05), transparent 68%);
}

.page-about .section {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0;
}

.page-about .section + .section {
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.page-about .prose {
  max-width: 34em;
  color: rgba(245, 241, 232, .82);
}

.page-about .prose + .prose {
  margin-top: .9em;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 240, 196, .4);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--cyan);
  background: rgba(43, 240, 196, .1);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero-copy h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--warm);
  max-width: 18em;
}

.page-about .about-hero-copy .lede {
  margin-top: 20px;
  max-width: 34em;
  color: rgba(245, 241, 232, .78);
}

.page-about .about-hero-copy .btn-row {
  margin-top: 26px;
}

.page-about .about-tally {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-tally-cell {
  padding: 18px 16px;
  background: linear-gradient(160deg, rgba(18, 58, 51, .78), rgba(8, 23, 20, .9));
  position: relative;
}

.page-about .about-tally-cell::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  width: 26px;
  height: 2px;
  background: var(--cyan);
  opacity: .7;
}

.page-about .about-tally-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--grey);
  margin: 0;
}

.page-about .about-tally-value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-tally-unit {
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--grey);
  letter-spacing: 0;
}

.page-about .about-tally-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(140, 151, 163, .95);
}

/* ---------- 团队构成 ---------- */
.page-about .about-role {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-role-bar {
  display: flex;
  height: 14px;
  border-radius: 2px;
  overflow: hidden;
  background: rgba(140, 151, 163, .1);
}

.page-about .about-role-seg {
  display: block;
  height: 100%;
  transition: filter .18s ease, transform .18s ease;
}

.page-about .about-role-seg--data {
  flex: 18 1 0%;
  background: linear-gradient(90deg, var(--cyan), rgba(43, 240, 196, .62));
}

.page-about .about-role-seg--edit {
  flex: 24 1 0%;
  background: rgba(43, 240, 196, .26);
  border-left: 1px solid rgba(8, 23, 20, .8);
  border-right: 1px solid rgba(8, 23, 20, .8);
}

.page-about .about-role-seg--care {
  flex: 26 1 0%;
  background: linear-gradient(90deg, rgba(255, 122, 43, .78), rgba(255, 122, 43, .42));
}

.page-about .about-role-bar:hover .about-role-seg {
  filter: saturate(1.18) brightness(1.06);
}

.page-about .about-role-legend {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-about .about-role-item {
  position: relative;
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  grid-template-areas:
    "swatch name count"
    ". desc desc";
  column-gap: 10px;
  row-gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--about-hair-soft);
  border-left: 2px solid rgba(140, 151, 163, .25);
  border-radius: 3px;
  background: rgba(18, 58, 51, .26);
  cursor: default;
}

.page-about .about-role-item:hover,
.page-about .about-role-item:focus-within {
  border-left-color: var(--cyan);
  background: rgba(18, 58, 51, .5);
}

.page-about .about-role-item::after {
  content: attr(data-tip);
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 3;
  width: min(300px, 82vw);
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--warm);
  background: rgba(20, 18, 15, .96);
  border: 1px solid rgba(43, 240, 196, .34);
  border-radius: 3px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity .16s ease, transform .16s ease, visibility .16s;
  pointer-events: none;
}

.page-about .about-role-item:hover::after,
.page-about .about-role-item:focus-within::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-role-swatch {
  grid-area: swatch;
  align-self: center;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-role-swatch--data { background: var(--cyan); }
.page-about .about-role-swatch--edit { background: rgba(43, 240, 196, .38); }
.page-about .about-role-swatch--care { background: var(--orange); }

.page-about .about-role-name {
  grid-area: name;
  font-weight: 700;
  font-size: 15px;
  color: var(--warm);
}

.page-about .about-role-count {
  grid-area: count;
  font-size: 15px;
  color: var(--amber);
  align-self: center;
}

.page-about .about-role-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.65;
  color: var(--grey);
}

.page-about .about-team-extra {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-team-card {
  padding: 22px 20px;
  border-left: 2px solid var(--cyan);
}

.page-about .about-team-card .card-index {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--grey);
  text-transform: uppercase;
}

.page-about .about-team-card .card-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 23px);
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-team-card .card-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 241, 232, .76);
}

.page-about .about-team-card .card-footer {
  margin: 14px 0 0;
  font-size: 13.5px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-timeline-figure {
  margin: 0;
}

.page-about .about-timeline-frame {
  border: 1px solid var(--about-hair);
}

.page-about .about-timeline-figure .image-frame-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-axis {
  position: relative;
  padding-left: 44px;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 22px;
  width: 2px;
  background: var(--about-axis);
}

.page-about .about-node {
  position: relative;
  padding: 2px 0 26px;
}

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

.page-about .about-node-dot {
  position: absolute;
  left: -44px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 240, 196, .12);
  transition: box-shadow .2s ease, background .2s ease;
}

.page-about .about-node:hover .about-node-dot {
  background: var(--cyan);
  box-shadow: 0 0 0 7px rgba(43, 240, 196, .18);
}

.page-about .about-node-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
}

.page-about .about-node-num {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--amber);
  padding: 2px 8px;
  border: 1px solid rgba(242, 193, 78, .34);
  border-radius: 2px;
}

.page-about .about-node-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 23px);
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-node-text {
  margin: 10px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 241, 232, .74);
}

/* ---------- 值班节奏 ---------- */
.page-about .about-shift-grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .about-shift-figure {
  margin: 0;
}

.page-about .about-shift-figure .image-frame-caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--grey);
}

.page-about .about-shift-copy .section-title {
  margin: 8px 0 18px;
  font-size: clamp(24px, 4vw, 34px);
}

.page-about .about-shift-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-shift-item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-shift-time {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .about-shift-title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--warm);
}

.page-about .about-shift-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(245, 241, 232, .72);
}

/* ---------- 发布流程 ---------- */
.page-about .about-flow-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(22px, 3.5vw, 36px);
  align-items: start;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow-step {
  position: relative;
  padding: 18px 18px 18px 24px;
  border: 1px solid var(--about-hair);
  border-radius: 3px;
  background: rgba(18, 58, 51, .24);
  transition: border-color .18s ease, background .18s ease;
}

.page-about .about-flow-step::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  width: 2px;
  height: 26px;
  background: var(--cyan);
}

.page-about .about-flow-step:hover {
  border-color: rgba(43, 240, 196, .4);
  background: rgba(18, 58, 51, .42);
}

.page-about .about-flow-num {
  display: block;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-about .about-flow-title {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 241, 232, .74);
}

.page-about .about-flow-figure {
  margin: 0;
}

.page-about .about-flow-figure .image-frame-caption {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--grey);
}

.page-about .about-flow-note {
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-flow-note p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(8, 23, 20, .88);
}

.page-about .about-flow-note .about-inline-link {
  color: #06392e;
  border-bottom-color: rgba(6, 57, 46, .5);
}

/* ---------- 帮助沉淀 ---------- */
.page-about .about-help-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .about-help-copy .section-title {
  margin: 8px 0 18px;
  font-size: clamp(24px, 4vw, 34px);
}

.page-about .about-help-slab {
  display: grid;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-help-row {
  display: grid;
  grid-template-columns: minmax(88px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  padding: 18px 20px;
  background: linear-gradient(140deg, rgba(18, 58, 51, .78), rgba(8, 23, 20, .9));
}

.page-about .about-help-num {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-help-label {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(245, 241, 232, .72);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partner-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(22px, 3.5vw, 36px);
}

.page-about .about-partner {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--about-hair);
  border-radius: 3px;
  background: rgba(8, 23, 20, .55);
  overflow: hidden;
}

.page-about .about-partner::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 240, 196, .14), transparent 68%);
  pointer-events: none;
}

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

.page-about .about-partner-title {
  margin: 10px 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(245, 241, 232, .74);
}

/* ---------- 档案卡 ---------- */
.page-about .about-archive-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3.5vw, 36px);
}

.page-about .about-archive-card {
  position: relative;
  padding: 20px 18px 20px 22px;
  background: rgba(245, 241, 232, .96);
  border-radius: 3px;
  color: var(--ink-text);
}

.page-about .about-archive-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
}

.page-about .about-archive-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .2em;
  color: #5d6660;
}

.page-about .about-archive-title {
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.005em;
  color: #1c2320;
}

.page-about .about-archive-value {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: #2b2b28;
  word-break: break-word;
}

.page-about .about-archive-note {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: #5d6660;
}

.page-about .about-copy {
  margin-top: 12px;
  font-size: 12.5px;
}

/* ---------- 一起做事 ---------- */
.page-about .about-join-inner {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .about-join-copy .section-title {
  margin: 8px 0 16px;
  font-size: clamp(24px, 4vw, 34px);
}

.page-about .about-join-paths {
  display: grid;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-join-path {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx desc";
  column-gap: 14px;
  row-gap: 4px;
  padding: 18px 20px;
  text-decoration: none;
  background: linear-gradient(140deg, rgba(18, 58, 51, .72), rgba(8, 23, 20, .9));
  transition: background .18s ease;
}

.page-about .about-join-path:hover,
.page-about .about-join-path:focus-visible {
  background: linear-gradient(140deg, rgba(43, 240, 196, .16), rgba(8, 23, 20, .94));
}

.page-about .about-join-index {
  grid-area: idx;
  align-self: center;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  padding-right: 12px;
  border-right: 1px solid var(--about-hair);
}

.page-about .about-join-name {
  grid-area: name;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--warm);
}

.page-about .about-join-desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(245, 241, 232, .68);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-tally {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-role-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-role-item {
    grid-template-columns: 12px minmax(0, 1fr);
    grid-template-areas:
      "swatch name"
      ". count"
      ". desc";
  }

  .page-about .about-role-count {
    align-self: start;
    text-align: left;
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-tally {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-about .about-help-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }

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

@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, .48fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline-figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-shift-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .about-help-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

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

  .page-about .about-join-inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role-seg,
  .page-about .about-node-dot,
  .page-about .about-role-item::after,
  .page-about .about-flow-step,
  .page-about .about-join-path {
    transition: none;
  }
}