.page-about {
  background: var(--void);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 64px) 0 clamp(40px, 6vw, 88px);
}

.page-about .about-watermark {
  position: absolute;
  top: -0.14em;
  right: -0.05em;
  font-family: var(--font-display);
  font-size: clamp(88px, 23vw, 268px);
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: var(--grid);
  opacity: 0.6;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.6vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero__text {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  color: var(--text-soft);
}

.page-about .hero-status {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--grid);
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(16px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .hero-status li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .hero-status .k {
  color: var(--lavender);
}

.page-about .hero-status .v {
  color: var(--cyan);
  font-weight: 600;
}

.page-about .about-hero__visual {
  max-width: 100%;
}

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

.page-about .about-hero__visual .media {
  border: 1px solid var(--grid);
  background: linear-gradient(160deg, var(--nebula), var(--void) 70%);
}

.page-about .about-hero__visual .media__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .about-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(48px, 7vw, 104px);
}

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

.page-about .about-flow {
  border-left: 1px solid var(--grid);
  padding-left: 18px;
}

.page-about .about-block {
  position: relative;
  padding: clamp(30px, 5vw, 60px) 0 clamp(28px, 4vw, 52px);
  border-top: 1px solid var(--grid);
}

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

.page-about .about-block::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.35s var(--ease);
}

.page-about .about-block[data-active]::before {
  background: var(--cyan);
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-h2--ink {
  color: var(--ink);
}

.page-about .about-text {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 34em;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-block[data-active] .eyebrow {
  color: var(--cyan);
}

.page-about .about-note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 34em;
  padding-left: 14px;
  border-left: 2px solid var(--violet);
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.75;
}

/* 交付清单 */
.page-about .deliver {
  list-style: none;
  margin: clamp(22px, 3vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-about .deliver__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--grid);
}

.page-about .deliver__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .deliver__name {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--cream);
  letter-spacing: 0.01em;
}

.page-about .deliver__desc {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* 奶油纸分区 */
.page-about .about-block--paper {
  background: var(--cream);
  color: var(--ink);
  border-top: 0;
  border-left: 4px solid var(--rust);
  padding: clamp(24px, 4vw, 52px) clamp(20px, 3.6vw, 48px);
  margin: clamp(20px, 3vw, 36px) 0;
}

.page-about .about-block--paper::before {
  display: none;
}

.page-about .paper-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rust);
  text-transform: uppercase;
}

.page-about .era {
  margin-top: clamp(22px, 3vw, 36px);
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--paper-line);
}

.page-about .era__title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}

.page-about .era__text {
  margin: 10px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(34, 24, 18, 0.86);
}

.page-about .era .media {
  margin-top: 20px;
  border: 1px solid var(--paper-line);
  background: linear-gradient(150deg, #E7DCC2, #D9CDB4);
}

.page-about .era .media__caption {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(34, 24, 18, 0.62);
}

/* 团队分工条形图 */
.page-about .roles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: end;
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .role {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-width: 0;
}

.page-about .role-bar {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
  padding-top: 8px;
  border: 1px solid var(--grid);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .role--edit .role-bar {
  height: 84px;
  background: linear-gradient(180deg, rgba(108, 75, 224, 0.6), rgba(53, 230, 208, 0.28));
  border-color: rgba(108, 75, 224, 0.7);
}

.page-about .role--care .role-bar {
  height: 56px;
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.55), rgba(255, 138, 61, 0.12));
  border-color: rgba(255, 138, 61, 0.6);
}

.page-about .role--index .role-bar {
  height: 44px;
  background: linear-gradient(180deg, rgba(53, 230, 208, 0.5), rgba(53, 230, 208, 0.1));
  border-color: rgba(53, 230, 208, 0.55);
}

.page-about .role--res .role-bar {
  height: 38px;
  background: linear-gradient(180deg, rgba(169, 163, 201, 0.45), rgba(169, 163, 201, 0.1));
  border-color: rgba(169, 163, 201, 0.5);
}

.page-about .role-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .role-info {
  min-height: 108px;
  padding-top: 12px;
}

.page-about .role-name {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .role-out {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-dim);
  opacity: 0.7;
  transition: opacity 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .role:hover .role-out {
  opacity: 1;
  color: var(--text-soft);
}

.page-about .role:hover .role-bar {
  transform: translateY(-3px);
}

/* 校对流程 */
.page-about .steps {
  list-style: none;
  margin: clamp(22px, 3vw, 36px) 0 0;
  padding: 0;
}

.page-about .step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--grid);
}

.page-about .step:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-about .step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .step-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .step-text {
  margin: 8px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

/* 服务半径 */
.page-about .reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 32px);
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3vw, 32px) 0;
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  align-items: center;
}

.page-about .reach__figure {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .reach__num {
  font-family: var(--font-display);
  font-size: clamp(56px, 9vw, 104px);
  line-height: 0.9;
  color: var(--amber);
  letter-spacing: -0.03em;
}

.page-about .reach__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lavender);
}

.page-about .reach__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .lang-list {
  list-style: none;
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  padding: 0;
}

.page-about .lang-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .lang-code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .lang-name {
  font-size: 16px;
  color: var(--cream);
}

.page-about .lang-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* 收束 */
.page-about .about-end {
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 2px solid var(--violet);
}

.page-about .about-end__line {
  margin: 0;
  max-width: 36em;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.7;
  color: var(--cream);
  font-weight: 500;
}

.page-about .about-end__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

@media (min-width: 720px) {
  .page-about .deliver__item {
    grid-template-columns: 78px 150px minmax(0, 1fr);
    gap: 6px 20px;
    align-items: start;
  }

  .page-about .deliver__code {
    padding-top: 4px;
  }

  .page-about .reach {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
  }

  .page-about .lang-list li {
    grid-template-columns: 96px 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .role--edit .role-bar {
    height: 168px;
  }

  .page-about .role--care .role-bar {
    height: 112px;
  }

  .page-about .role--index .role-bar {
    height: 88px;
  }

  .page-about .role--res .role-bar {
    height: 76px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 40px);
  }

  .page-about .about-hero__lede {
    grid-column: 1 / span 7;
  }

  .page-about .about-hero__visual {
    grid-column: 9 / span 4;
    margin-top: 46px;
  }

  .page-about .era--indent {
    margin-left: 16%;
  }
}

@media (min-width: 1024px) {
  .page-about .about-stage {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 112px;
    align-self: start;
    padding-top: 8px;
  }

  .page-about .about-flow {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-block::before {
    left: -2px;
  }

  .page-about .about-block {
    padding-left: 24px;
    margin-left: 0;
  }

  .page-about .about-block--paper {
    padding-left: clamp(24px, 3.6vw, 48px);
  }

  .page-about .about-block--paper::before {
    display: none;
  }

  .page-about .about-end {
    padding-left: 24px;
  }

  .page-about .roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .rail-node {
  display: block;
  border-left: 2px solid var(--grid);
  padding: 10px 0 10px 14px;
  text-decoration: none;
  color: var(--text-dim);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .rail-node:hover {
  color: var(--text);
  border-color: var(--violet);
}

.page-about .rail-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--lavender);
  transition: color 0.3s var(--ease);
}

.page-about .rail-label {
  display: block;
  margin-top: 3px;
  font-size: 14px;
  font-weight: 500;
}

.page-about:has(#stage-01[data-active]) .rail-node[href="#stage-01"],
.page-about:has(#stage-02[data-active]) .rail-node[href="#stage-02"],
.page-about:has(#stage-03[data-active]) .rail-node[href="#stage-03"],
.page-about:has(#stage-04[data-active]) .rail-node[href="#stage-04"],
.page-about:has(#stage-05[data-active]) .rail-node[href="#stage-05"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about:has(#stage-01[data-active]) .rail-node[href="#stage-01"] .rail-num,
.page-about:has(#stage-02[data-active]) .rail-node[href="#stage-02"] .rail-num,
.page-about:has(#stage-03[data-active]) .rail-node[href="#stage-03"] .rail-num,
.page-about:has(#stage-04[data-active]) .rail-node[href="#stage-04"] .rail-num,
.page-about:has(#stage-05[data-active]) .rail-node[href="#stage-05"] .rail-num {
  color: var(--cyan);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-bar,
  .page-about .role-out,
  .page-about .rail-node,
  .page-about .rail-num,
  .page-about .about-block::before {
    transition: none;
  }

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