.page-about {
  --about-rail: 196px;
  --about-warm-line: rgba(246, 196, 83, 0.38);
  --about-cyan-line: rgba(111, 247, 210, 0.28);
  background: var(--bg);
  color: var(--text);
  overflow-x: clip;
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 刊头 ---------- */
.page-about .about-masthead {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(111, 247, 210, 0.14), transparent 58%),
    radial-gradient(90% 80% at 92% 100%, rgba(255, 107, 44, 0.12), transparent 62%),
    linear-gradient(165deg, var(--moss), var(--ink) 64%);
}

.page-about .about-masthead__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-masthead__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(102deg, rgba(6, 22, 18, 0.95) 0%, rgba(6, 22, 18, 0.78) 46%, rgba(6, 22, 18, 0.32) 100%);
}

.page-about .about-masthead__inner {
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(30px, 5.5vw, 66px);
}

.page-about .about-stamp {
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--warm);
}

.page-about .about-masthead__title {
  margin: 0.34em 0 0.4em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.3rem, 8.4vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-masthead__lede {
  max-width: 48ch;
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(0.98rem, 2.4vw, 1.1rem);
  line-height: 1.9;
  color: var(--text-2);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: clamp(16px, 2.6vw, 22px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.6vw, 22px);
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-stats__num {
  font-family: var(--font-data);
  font-size: clamp(1.4rem, 3.6vw, 1.95rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.page-about .about-stats__label {
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--text-2);
}

/* ---------- 跨页布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(26px, 4.5vw, 60px);
  padding-top: clamp(30px, 5.5vw, 66px);
}

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-about .about-rail__vertical {
  display: none;
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--warm);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-2);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--text);
  border-color: var(--line-strong);
}

.page-about .about-index__no {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--accent);
}

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

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  scroll-margin-top: 84px;
  padding-bottom: clamp(38px, 6.5vw, 82px);
}

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

.page-about .about-sec__title {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin: 0 0 clamp(14px, 2.4vw, 22px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.42rem, 4.2vw, 2.1rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-sec__no {
  flex: 0 0 auto;
  padding-top: 0.4em;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--hot);
}

.page-about .about-sec__lede {
  max-width: 62ch;
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-family: var(--font-body);
  font-size: clamp(0.96rem, 2.2vw, 1.04rem);
  line-height: 1.9;
  color: var(--text-2);
}

.page-about .about-prose p {
  max-width: 62ch;
  margin: 0 0 1em;
  font-family: var(--font-body);
  font-size: clamp(0.96rem, 2.2vw, 1.04rem);
  line-height: 1.9;
  color: var(--text-2);
}

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

.page-about .about-prose strong {
  color: var(--text);
  font-weight: 700;
}

.page-about .about-prose--tight p {
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-inline-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--about-cyan-line);
  padding-bottom: 1px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--hot);
  border-bottom-color: var(--hot);
}

/* ---------- 引用票据 ---------- */
.page-about .about-pull {
  position: relative;
  margin-top: clamp(20px, 3.4vw, 32px);
  padding: clamp(18px, 3vw, 28px);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  box-shadow: 0 22px 46px -34px rgba(0, 0, 0, 0.95);
}

.page-about .about-pull::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  margin: 0 10px;
  height: 6px;
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--panel);
  opacity: 0.7;
}

.page-about .about-pull__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(0.98rem, 2.3vw, 1.07rem);
  line-height: 1.9;
  color: var(--text);
}

.page-about .about-pull__sign {
  margin: 14px 0 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text-2);
  text-align: right;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--amber) 52%, var(--lava));
  opacity: 0.45;
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 16px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}

.page-about .about-node {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

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

.page-about .about-node > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node > summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-about .about-node__season {
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--warm);
  border: 1px solid var(--about-warm-line);
  padding: 2px 8px;
  flex: 0 0 auto;
}

.page-about .about-node__label {
  flex: 1 1 auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.16rem);
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-node__plus {
  position: relative;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  margin-left: auto;
  align-self: center;
}

.page-about .about-node__plus::before,
.page-about .about-node__plus::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--accent);
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-about .about-node__plus::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-about .about-node__plus::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-about .about-node[open] .about-node__plus::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-about .about-node__body {
  padding-top: 12px;
}

.page-about .about-node__body p {
  margin: 0;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.88;
  color: var(--text-2);
}

/* ---------- 媒体框 ---------- */
.page-about .about-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-2);
  padding: 8px;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-media--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-media__cap {
  margin: 8px 0 0;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--text-2);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

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

.page-about .about-role {
  position: relative;
  min-width: 0;
  padding: clamp(14px, 2.6vw, 20px);
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-about .about-role:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .about-role--data {
  border-top: 2px solid var(--accent);
}

.page-about .about-role--video {
  border-top: 2px solid var(--warm);
}

.page-about .about-role--tech {
  border-top: 2px solid var(--hot);
}

.page-about .about-role__count {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.55rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.page-about .about-role--video .about-role__count {
  color: var(--warm);
}

.page-about .about-role--tech .about-role__count {
  color: var(--hot);
}

.page-about .about-role__name {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-role__desc {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 四步流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-steps__item {
  min-width: 0;
  padding: clamp(14px, 2.6vw, 20px);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
}

.page-about .about-steps__no {
  display: block;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.page-about .about-steps__name {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-steps__desc {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--text-2);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .about-eco__figure {
  align-self: start;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-eco__node {
  position: relative;
  min-width: 0;
  padding: 15px 16px 15px 20px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-about .about-eco__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0.22);
  transform-origin: top;
  opacity: 0.6;
  transition: transform 0.26s ease, opacity 0.26s ease;
}

.page-about .about-eco__node:hover,
.page-about .about-eco__node:focus-within {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-eco__node:hover::before,
.page-about .about-eco__node:focus-within::before {
  transform: scaleY(1);
  opacity: 1;
}

.page-about .about-eco__no {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--warm);
}

.page-about .about-eco__name {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-eco__desc {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-eco__dir {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--accent);
  opacity: 0.72;
  transition: opacity 0.22s ease;
}

.page-about .about-eco__node:hover .about-eco__dir,
.page-about .about-eco__node:focus-within .about-eco__dir {
  opacity: 1;
}

.page-about .about-eco__foot {
  margin: clamp(16px, 3vw, 24px) 0 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-2);
}

/* ---------- 服务与联系 ---------- */
.page-about .about-service {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

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

.page-about .about-chips {
  list-style: none;
  margin: 0 0 clamp(16px, 3vw, 22px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-chip {
  padding: 6px 11px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--text-2);
}

.page-about .about-contact {
  min-width: 0;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
}

.page-about .about-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--warm);
}

.page-about .about-contact__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-2);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-contact__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-role--video {
    margin-top: 24px;
  }

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

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

  .page-about .about-eco__node:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-service {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
    gap: 26px;
  }

  .page-about .about-rail__vertical {
    display: block;
    height: 172px;
    padding-left: 10px;
    border-left: 1px solid var(--line);
    writing-mode: vertical-rl;
    font-family: var(--font-data);
    font-size: 11.5px;
    letter-spacing: 0.42em;
    color: var(--text-2);
  }

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

  .page-about .about-index__list li {
    border-bottom: 1px solid var(--line);
  }

  .page-about .about-index__list a {
    border: 0;
    background: none;
    padding: 11px 0 11px 14px;
    white-space: normal;
    position: relative;
    line-height: 1.5;
  }

  .page-about .about-index__list a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 5px;
    height: 5px;
    transform: translateY(-50%);
    background: var(--line-strong);
    transition: background 0.18s ease;
  }

  .page-about .about-index__list a:hover::before,
  .page-about .about-index__list a:focus-visible::before {
    background: var(--hot);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

  .page-about .about-eco__node:first-child {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-steps__item:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-steps__item:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .about-steps__item:nth-child(4) {
    margin-top: 78px;
  }

  .page-about .about-masthead__inner {
    padding-right: 8%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-eco__node,
  .page-about .about-eco__node::before,
  .page-about .about-eco__dir,
  .page-about .about-node__plus::before,
  .page-about .about-node__plus::after {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-eco__node:hover {
    transform: none;
  }
}
<<<END>>>