.page-about {
  --about-track-w: 200px;
  --about-gap: 56px;
  --about-rule: rgba(18, 20, 23, 0.14);
  --about-rule-dark: rgba(215, 222, 217, 0.18);
  background: var(--paper);
  color: var(--carbon);
  font-family: var(--font-body);
  line-height: 1.78;
}

.page-about .breadcrumb-sep {
  margin: 0 8px;
  color: var(--steel);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 5.6vw, 72px) 0 clamp(48px, 6.5vw, 92px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(198, 255, 61, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  color: var(--paper);
  border-bottom: 1px solid rgba(198, 255, 61, 0.3);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(215, 222, 217, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(215, 222, 217, 0.055) 1px, transparent 1px);
  background-size: 76px 76px;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-hero .breadcrumb {
  color: var(--steel);
}

.page-about .about-hero .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  color: var(--lime);
}

.page-about .about-hero .eyebrow {
  margin: 20px 0 0;
  color: var(--lime);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: rgba(242, 240, 230, 0.78);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 30px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-rule-dark);
}

.page-about .about-meta-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: -0.01em;
}

.page-about .about-meta-label {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-about .about-hero-figure {
  margin: 0;
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(198, 255, 61, 0.24);
}

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

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  padding-top: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(50px, 7vw, 92px);
}

.page-about .about-track {
  margin: 0 0 10px;
}

.page-about .about-track-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-track-list {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  border-bottom: 1px solid var(--about-rule);
  scrollbar-width: none;
}

.page-about .about-track-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-track-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  font-size: 13px;
  text-decoration: none;
  color: rgba(18, 20, 23, 0.7);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-track-list a::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-track-list a:hover,
.page-about .about-track-list a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--lime);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: clamp(30px, 4.2vw, 54px) 0;
  border-top: 1px solid var(--about-rule);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-about .about-index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--orange);
}

.page-about .about-sec h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 37px);
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--ink);
}

.page-about .about-sec p {
  margin: 0 0 16px;
  max-width: 64ch;
  font-size: 15.5px;
  color: rgba(18, 20, 23, 0.82);
}

.page-about .about-inline-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-dim);
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .about-inline-link--dark {
  color: var(--lime);
  border-bottom-color: rgba(198, 255, 61, 0.5);
}

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

/* ---------- 缘起 ---------- */
.page-about .about-statement {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4vw, 43px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: none;
}

.page-about .about-statement span {
  background: var(--lime);
  color: var(--ink);
  padding: 0 0.16em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.page-about .about-quote {
  margin: 26px 0;
  padding: 18px 0 18px 22px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.72;
  color: var(--ink);
  max-width: 34ch;
}

/* ---------- 三原则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-principle {
  padding: 22px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-principle-no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-about .about-principle h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(18, 20, 23, 0.78);
}

/* ---------- 深色面板 ---------- */
.page-about .about-sec--panel {
  border-top: 0;
  margin: clamp(18px, 3vw, 30px) 0;
  padding: clamp(24px, 4vw, 44px);
  background: var(--carbon);
  color: var(--mist);
}

.page-about .about-sec--panel h2 {
  color: var(--paper);
}

.page-about .about-sec--panel p {
  color: rgba(215, 222, 217, 0.78);
}

.page-about .about-index--dark {
  color: var(--lime);
}

.page-about .about-flow-figure,
.page-about .about-era-figure {
  margin: 22px 0 0;
  aspect-ratio: 16 / 8;
  border: 1px solid rgba(198, 255, 61, 0.2);
}

.page-about .about-flow-figure img,
.page-about .about-era-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 流程图 ---------- */
.page-about .about-flow-svg-wrap {
  margin: 24px 0 6px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.page-about .about-flow-svg {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.page-about .about-flow-svg .flow-line {
  fill: none;
  stroke: rgba(198, 255, 61, 0.5);
  stroke-width: 1.5;
}

.page-about .about-flow-svg .flow-dash {
  fill: none;
  stroke: rgba(215, 222, 217, 0.14);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.page-about .about-flow-svg .flow-node {
  fill: var(--carbon);
  stroke: var(--lime);
  stroke-width: 1.5;
}

.page-about .about-flow-svg text {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .about-flow-svg .flow-num {
  font-size: 11.5px;
  fill: var(--lime);
  letter-spacing: 0.12em;
}

.page-about .about-steps {
  display: grid;
  gap: 18px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-steps li {
  padding-top: 14px;
  border-top: 1px solid var(--about-rule-dark);
}

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

.page-about .about-step-no {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-step-name {
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-step-time {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .about-steps li p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-team li {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-team-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-team-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-team li p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(18, 20, 23, 0.78);
}

/* ---------- 时间线 ---------- */
.page-about .about-sec--timeline {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border: 1px solid rgba(198, 255, 61, 0.2);
}

.page-about .about-era-list {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-era-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: rgba(198, 255, 61, 0.32);
}

.page-about .about-era {
  position: relative;
  padding-left: 32px;
}

.page-about .about-era::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--lime);
  border-radius: 50%;
  background: var(--ink-deep);
}

.page-about .about-era summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding: 11px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-era summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--steel);
  transition: color 0.2s var(--ease);
}

.page-about .about-era[open] summary::after {
  content: "–";
  color: var(--lime);
}

.page-about .about-era summary:focus-visible {
  outline: 1px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-era-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-era-name {
  font-family: var(--font-display);
  font-size: clamp(16px, 2.1vw, 21px);
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-era p {
  margin: 0 0 16px;
  padding-right: 4px;
  font-size: 14.5px;
  line-height: 1.8;
}

/* ---------- 荣誉墙 ---------- */
.page-about .about-sec--honors {
  background:
    radial-gradient(110% 100% at 10% 0%, rgba(255, 106, 42, 0.18), transparent 58%),
    var(--wine);
  border: 1px solid rgba(242, 240, 230, 0.22);
}

.page-about .about-sec--honors p {
  color: rgba(242, 240, 230, 0.84);
}

.page-about .about-honors-grid {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-honor {
  padding: 20px 20px 22px;
  border: 1px solid rgba(242, 240, 230, 0.3);
  background: rgba(11, 43, 38, 0.18);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-within {
  border-color: var(--lime);
  background: rgba(11, 43, 38, 0.34);
  transform: translateY(-2px);
}

.page-about .about-honor-year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(242, 240, 230, 0.7);
  transition: color 0.24s var(--ease);
}

.page-about .about-honor:hover .about-honor-year,
.page-about .about-honor:focus-within .about-honor-year {
  color: var(--lime);
}

.page-about .about-honor-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.34;
  letter-spacing: 0.005em;
  color: var(--paper);
}

.page-about .about-honor-meta {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(242, 240, 230, 0.62);
  transition: color 0.24s var(--ease);
}

.page-about .about-honor:hover .about-honor-meta,
.page-about .about-honor:focus-within .about-honor-meta {
  color: rgba(242, 240, 230, 0.92);
}

.page-about .about-honors-note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(242, 240, 230, 0.72);
  max-width: 58ch;
}

/* ---------- 服务与联络 ---------- */
.page-about .about-service-grid {
  display: grid;
  gap: 26px;
  margin: 24px 0 0;
}

.page-about .about-sub-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

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

.page-about .about-service-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(18, 20, 23, 0.78);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-service-key {
  min-width: 60px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-contact-card {
  padding: 22px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid rgba(198, 255, 61, 0.24);
}

.page-about .about-contact-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-contact-list {
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--about-rule-dark);
}

.page-about .about-contact-list > div {
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px solid var(--about-rule-dark);
}

.page-about .about-contact-list dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-about .about-contact-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-contact-card .btn {
  width: 100%;
  text-align: center;
}

.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-next a {
  display: inline-block;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: rgba(18, 20, 23, 0.78);
  border: 1px solid var(--about-rule);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  color: var(--ink);
  border-color: var(--lime-dim);
  background: rgba(198, 255, 61, 0.22);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-principle {
    padding: 24px 22px 26px;
    border-bottom: 0;
    border-right: 1px solid var(--about-rule);
  }

  .page-about .about-principle:first-child {
    padding-left: 0;
  }

  .page-about .about-principle:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 34px;
  }

  .page-about .about-team li {
    grid-template-columns: 44px minmax(0, 170px) minmax(0, 1fr);
    align-items: start;
    column-gap: 22px;
  }

  .page-about .about-service-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 34px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-about .about-hero-figure {
    aspect-ratio: 3 / 4;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-track-w) minmax(0, 1fr);
    column-gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-track {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    margin-bottom: 0;
  }

  .page-about .about-track-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-top: 1px solid var(--about-rule);
  }

  .page-about .about-track-list li {
    border-bottom: 1px solid var(--about-rule);
  }

  .page-about .about-track-list a {
    display: flex;
    width: 100%;
    padding: 11px 0;
    font-family: var(--font-display);
    font-size: 15px;
    letter-spacing: 0.02em;
    color: rgba(18, 20, 23, 0.62);
    border-bottom: 0;
    transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
  }

  .page-about .about-track-list a:hover,
  .page-about .about-track-list a:focus-visible {
    color: var(--ink);
    padding-left: 6px;
    border-bottom-color: transparent;
  }

  .page-about .about-track-list a:hover::before,
  .page-about .about-track-list a:focus-visible::before {
    color: var(--orange);
  }
}

@media (min-width: 1180px) {
  .page-about .about-sec--panel {
    padding: clamp(30px, 3.4vw, 46px) clamp(28px, 3.6vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-honor,
  .page-about .about-track-list a,
  .page-about .about-next a {
    transition-property: color, border-color, background-color;
  }

  .page-about .about-honor:hover,
  .page-about .about-honor:focus-within {
    transform: none;
  }

  .page-about .about-track-list a:hover,
  .page-about .about-track-list a:focus-visible {
    padding-left: 0;
  }
}
<<<END>>>