.page-about {
  --about-measure: 66ch;
  color: var(--paper);
  font-family: var(--font-sans);
  background:
    radial-gradient(120% 70% at 88% 0%, rgba(99, 255, 196, 0.07), transparent 62%),
    linear-gradient(180deg, var(--deep) 0%, var(--ink) 58%, var(--ink) 100%);
  padding-bottom: 0;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-about .about-crumb {
  border-bottom: 1px solid var(--line-soft);
  background: rgba(8, 13, 11, 0.55);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0.85rem 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-about .about-crumb li:not(:first-child)::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line);
}

.page-about .about-crumb a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--paper);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-kicker {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-hero__text h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(1.9rem, 6vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0 0 1.6rem;
  max-width: var(--about-measure);
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--gray);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem 1.25rem;
  margin: 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  line-height: 1;
  font-weight: 700;
  color: var(--mint);
}

.page-about .about-stat__label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-hero__media {
  margin: 0;
}

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

.page-about .about-hero__caption,
.page-about .about-figure__caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
}

/* 主体两栏 */
.page-about .about-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.25rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
}

.page-about .about-index__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-about .about-index__list {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.55rem 0.2rem;
  font-size: 0.92rem;
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--mint);
  background: var(--mint-soft);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(99, 255, 196, 0.7);
}

/* 章节 */
.page-about .about-sec {
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-about .about-h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 3.4vw, 2.05rem);
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-p {
  max-width: var(--about-measure);
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .about-p--lead {
  font-size: 1.05rem;
  color: var(--paper);
}

/* 岗位卡 */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.5rem 0 1.75rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-role {
  padding: 1.05rem 1.15rem 1.2rem;
  background: var(--deep);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-role:hover {
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--mint);
}

.page-about .about-role__num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

.page-about .about-role__name {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--gray);
}

/* 图片区 */
.page-about .about-figure {
  margin: 1.5rem 0;
}

/* 流程箭头 */
.page-about .about-arrow {
  display: block;
  width: 100%;
  max-width: 240px;
  height: auto;
  margin: 1.25rem 0 0.25rem;
  color: var(--line);
}

/* 夜间流程 */
.page-about .about-flow {
  display: grid;
  gap: 1.35rem;
  margin: 1rem 0 0;
  padding: 0 0 0 1.25rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: calc(-1.25rem - 5px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--deep);
  border: 1px solid var(--mint);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-stage:hover::before {
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(99, 255, 196, 0.12);
}

.page-about .about-stage__no {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-stage__title {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-stage__body {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-quote {
  margin: 2rem 0 0;
  padding: 0.35rem 0 0.35rem 1.1rem;
  border-left: 2px solid var(--orange);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  line-height: 1.7;
  color: var(--paper);
}

/* 覆盖数据块 */
.page-about .about-coverage {
  margin: 1.4rem 0 1.5rem;
  padding: clamp(1.1rem, 3vw, 1.9rem);
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(90deg, rgba(36, 64, 56, 0.35) 0 1px, transparent 1px 32px),
    linear-gradient(150deg, var(--panel), var(--deep) 85%);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figure-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  border-left: 1px solid var(--line);
  padding-left: 0.75rem;
}

.page-about .about-figure-item__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

.page-about .about-figure-item__num small {
  font-size: 0.55em;
  margin-left: 0.15em;
  color: var(--gray);
}

.page-about .about-figure-item__label {
  font-size: 0.76rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--gray);
}

/* 反馈闭环 */
.page-about .about-loop {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-step {
  position: relative;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--deep);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background: var(--panel);
}

.page-about .about-step__num {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-about .about-step__title {
  margin: 0 0 0.35rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-step__desc {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--gray);
}

/* 时间线 */
.page-about .about-timeline {
  display: grid;
  gap: 1.5rem;
  margin: 1.4rem 0 0;
  padding: 0 0 0 1.4rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 0.4rem;
  left: calc(-1.4rem - 5px);
  width: 9px;
  height: 9px;
  background: var(--panel);
  border: 1px solid var(--line);
  transform: rotate(45deg);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-tl:hover::before {
  border-color: var(--mint);
  background: var(--mint-soft);
}

.page-about .about-tl__season {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-tl__title {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-tl__desc {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--gray);
}

/* 收尾 */
.page-about .about-cta {
  margin-top: clamp(2.25rem, 6vw, 3.75rem);
  padding: clamp(1.4rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--panel) 0%, var(--deep) 70%);
}

.page-about .about-cta__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  line-height: 1.35;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0 0 1.4rem;
  max-width: var(--about-measure);
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

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

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

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

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 5.5rem;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 1.6rem;
  }

  .page-about .about-stage::before {
    top: calc(-1.6rem - 5px);
    left: 0;
  }

  .page-about .about-loop {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2rem;
  }

  .page-about .about-figures {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-arrow {
    margin: 1.5rem 0 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>