.page-about {
  --about-text: #C2D0E3;
  --about-index-w: 220px;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-sans);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 26px) 0 40px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(8, 17, 31, 0.35) 0%, rgba(8, 17, 31, 0.94) 72%, var(--ink) 100%),
    repeating-linear-gradient(90deg, rgba(43, 59, 83, 0.5) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(43, 59, 83, 0.5) 0 1px, transparent 1px 72px),
    var(--panel);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

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

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(32px, 6.4vw, 64px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--about-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__meta {
  margin: 22px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--red);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-hero__visual {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-up);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  position: relative;
}

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

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: 0;
  padding-top: 4px;
  padding-bottom: 8px;
}

.page-about .about-index {
  padding: 18px 0 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__title {
  display: none;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted-dim);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--white);
  border-color: var(--red);
  background: var(--panel-up);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--red);
}

.page-about .about-index .back-link {
  display: inline-block;
  margin-top: 14px;
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
}

.page-about .about-section__head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-section__head::before {
  content: "";
  width: 30px;
  height: 3px;
  background: var(--red);
}

.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--yellow);
}

.page-about .about-section__title {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 34px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-section p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-text);
}

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

.page-about .about-section__lead {
  max-width: 60ch;
  margin-bottom: 22px !important;
  color: var(--muted) !important;
}

/* ---------- 服务对象行 ---------- */
.page-about .about-points {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-point {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-point__key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--yellow-soft);
}

.page-about .about-point__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-text);
}

.page-about .about-band {
  margin: 26px 0 0;
  padding: 16px 16px 16px 18px;
  border-left: 3px solid var(--red);
  background: linear-gradient(90deg, rgba(226, 59, 59, 0.14), rgba(226, 59, 59, 0));
  font-size: clamp(16px, 2.3vw, 21px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--white);
}

/* ---------- 规模数字 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin: 4px 0 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--panel);
  padding: 16px 16px 18px;
  border-top: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-stat:hover {
  border-top-color: var(--yellow);
  background: var(--panel-up);
}

.page-about .about-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-stat__note {
  margin: 8px 0 0 !important;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted-dim) !important;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}

.page-about .about-node {
  position: relative;
  padding-bottom: 10px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 16px;
  width: 11px;
  height: 11px;
  background: var(--yellow);
}

.page-about .about-node__body {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 0 14px 14px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-node__body:hover,
.page-about .about-node__body[open] {
  border-color: var(--line-soft);
}

.page-about .about-node__body[open] {
  background: var(--panel-up);
}

.page-about .about-node__summary {
  position: relative;
  display: block;
  padding: 13px 26px 13px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary::after {
  content: "＋";
  position: absolute;
  right: 0;
  top: 11px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--yellow);
}

.page-about .about-node__body[open] > .about-node__summary::after {
  content: "－";
}

.page-about .about-node__period {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--yellow-soft);
}

.page-about .about-node__title {
  display: block;
  margin-top: 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-node__text {
  margin: 4px 0 10px !important;
  font-size: 14.5px !important;
  line-height: 1.75 !important;
}

.page-about .about-node__facts {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  line-height: 1.6 !important;
  letter-spacing: 0.04em;
  color: var(--teal) !important;
}

/* ---------- 方法 ---------- */
.page-about .about-method {
  display: grid;
  gap: 24px;
}

.page-about .about-method__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-up);
  overflow: hidden;
  aspect-ratio: 1 / 1;
}

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

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

.page-about .about-method__item {
  padding-left: 16px;
  border-left: 2px solid var(--red);
}

.page-about .about-method__item + .about-method__item {
  margin-top: 26px;
  border-left-color: var(--teal);
}

.page-about .about-method__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.3vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-method__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0 !important;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1px;
  margin-top: 4px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__panel {
  background: var(--panel);
  padding: 18px 16px 20px;
}

.page-about .about-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-about .about-team__panel:nth-child(2) .about-team__count {
  color: var(--red);
}

.page-about .about-team__panel:nth-child(3) .about-team__count {
  color: var(--white);
}

.page-about .about-team__role {
  margin: 12px 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-team__lower {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

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

.page-about .about-rhythm__item {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--red);
}

.page-about .about-rhythm__text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-text);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-up);
  overflow: hidden;
  aspect-ratio: 8 / 5;
}

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

.page-about .about-visits {
  margin: 22px 0 0 !important;
  padding: 14px 16px;
  border-left: 3px solid var(--yellow);
  background: var(--panel);
  font-size: 14.5px !important;
  line-height: 1.78 !important;
  color: var(--about-text) !important;
}

/* ---------- 合作生态 ---------- */
.page-about .about-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 520px;
}

.page-about .about-table thead th {
  padding: 11px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}

.page-about .about-table tbody th,
.page-about .about-table tbody td {
  padding: 13px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
  color: var(--about-text);
  line-height: 1.7;
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-table tbody th {
  font-weight: 700;
  color: var(--white);
  white-space: nowrap;
}

.page-about .about-table tbody td.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--yellow-soft);
  white-space: nowrap;
}

.page-about .about-table__dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  vertical-align: middle;
}

.page-about .about-table__dot--red {
  background: var(--red);
}

.page-about .about-table__dot--yellow {
  background: var(--yellow);
}

.page-about .about-table__dot--plain {
  background: var(--muted-dim);
}

.page-about .about-awards {
  margin-top: 22px;
  padding: 18px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
}

.page-about .about-awards__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-awards p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 承诺 ---------- */
.page-about .about-commit {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-commit__item {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-commit__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--yellow);
}

.page-about .about-commit__text {
  margin: 0 !important;
  font-size: 15px !important;
  line-height: 1.78 !important;
}

.page-about .about-commit__text a {
  color: var(--yellow-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-about .about-commit__text a:hover,
.page-about .about-commit__text a:focus-visible {
  color: var(--white);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

/* ---------- 常驻入口 ---------- */
.page-about .about-float {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: #FFFFFF;
  text-decoration: none;
  background: var(--red);
  border: 1px solid var(--red-deep);
  box-shadow: 0 8px 18px rgba(8, 17, 31, 0.55);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-float::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--yellow);
}

.page-about .about-float:hover,
.page-about .about-float:focus-visible {
  background: var(--red-deep);
  border-color: var(--yellow);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-hero {
    padding: calc(var(--header-h) + 34px) 0 52px;
  }

  .page-about .about-section {
    padding: 46px 0;
  }
}

@media (min-width: 720px) {
  .page-about .about-point {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-point__key {
    padding-top: 3px;
  }

  .page-about .about-hero__title {
    font-size: clamp(40px, 5.4vw, 60px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-team {
    grid-template-columns: 1.3fr 1fr 1fr;
  }

  .page-about .about-method {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-team__lower {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 24px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    padding: 4px 0 4px 18px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-index__title {
    display: block;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-index__item + .about-index__item {
    margin-top: 2px;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    padding: 9px 0 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
    border-left-color: var(--red);
  }

  .page-about .about-index .back-link {
    margin-top: 18px;
  }

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

  .page-about .about-section {
    padding: 56px 0;
  }

  .page-about .about-section__head {
    margin-bottom: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-stat,
  .page-about .about-node__body,
  .page-about .about-float,
  .page-about .about-commit__text a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>