.page-about {
  --about-shadow: 0 18px 44px rgba(0, 0, 0, .32);
  --about-hair: 1px solid var(--line);
}

/* 面包屑留白 */
.page-about .breadcrumb {
  padding-top: 18px;
}

/* 首屏声明 */
.page-about .about-masthead {
  position: relative;
  padding-block: clamp(28px, 6vw, 64px) clamp(34px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(182, 255, 59, .12), transparent 58%),
    linear-gradient(180deg, var(--void) 0%, var(--cabinet) 100%);
  border-bottom: var(--about-hair);
  overflow: hidden;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), var(--amber) 45%, transparent 78%);
  opacity: .7;
}

.page-about .about-masthead-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-folio {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--slate);
  margin: 0;
}

.page-about .about-masthead-body .eyebrow {
  color: var(--lime);
  margin-bottom: 14px;
}

.page-about .about-masthead h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 7.4vw, 96px);
  line-height: 1.02;
  letter-spacing: -.03em;
  font-weight: 800;
  color: var(--mist);
  max-width: 15em;
}

.page-about .about-masthead .lede {
  max-width: 40em;
  color: var(--moss);
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  margin: 0;
}

/* 数字带 */
.page-about .about-statband {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--about-hair);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--void);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -.01em;
  line-height: 1;
}

.page-about .about-stat-label {
  font-size: 12px;
  color: var(--slate);
  letter-spacing: .04em;
}

/* 通用章节头 */
.page-about .about-section-head {
  max-width: 46em;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-section-head .eyebrow {
  color: var(--lime);
  margin-bottom: 12px;
}

.page-about .about-section-head h2,
.page-about .about-origin-text h2,
.page-about .about-board h2,
.page-about .about-reach-text h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-section-head .lede {
  margin: 0;
  color: var(--moss);
  line-height: 1.8;
  max-width: 38em;
}

/* 图片 */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--about-hair);
  background: var(--cabinet);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-figure .media-caption {
  padding: 12px 16px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
  border-top: var(--about-hair);
  background: var(--cabinet);
}

/* 品牌起点 */
.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin-text .eyebrow {
  color: var(--slate);
  margin-bottom: 12px;
}

.page-about .about-origin-text > p {
  color: var(--moss);
  line-height: 1.85;
  font-size: 16px;
  margin: 0 0 16px;
  max-width: 34em;
}

.page-about .about-lines {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-lines li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--line);
  background: linear-gradient(90deg, rgba(13, 43, 38, .9), rgba(13, 43, 38, 0));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--moss);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-line-key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-about .about-note {
  font-size: 14px !important;
  color: var(--slate) !important;
  padding-top: 16px;
  border-top: var(--about-hair);
}

/* 团队分工 */
.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-role {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  border: var(--about-hair);
  background: var(--cabinet);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-role-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-role h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -.01em;
  color: var(--mist);
  font-weight: 700;
}

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

.page-about .about-tags {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-4px);
  border-color: rgba(182, 255, 59, .45);
  background: var(--cabinet-lift);
}

/* 校对流程 */
.page-about .about-proof {
  background: linear-gradient(180deg, rgba(13, 43, 38, .55), rgba(7, 30, 26, 0));
}

.page-about .about-proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-proof-main .eyebrow {
  color: var(--amber);
  margin-bottom: 12px;
}

.page-about .about-proof-main > p {
  color: var(--moss);
  line-height: 1.85;
  margin: 0 0 20px;
  max-width: 34em;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-step {
  border: var(--about-hair);
  border-radius: var(--radius-md);
  background: var(--void);
  overflow: hidden;
  transition: border-color .2s var(--ease);
}

.page-about .about-step:hover {
  border-color: rgba(143, 166, 184, .5);
}

.page-about .about-step details {
  padding: 0;
}

.page-about .about-step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--mist);
  font-weight: 700;
  font-size: 16px;
}

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

.page-about .about-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--slate);
  font-size: 18px;
  line-height: 1;
}

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

.page-about .about-step-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--on-lime);
  background: var(--lime);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  min-width: 34px;
  text-align: center;
}

.page-about .about-step--fix .about-step-no {
  background: var(--amber);
}

.page-about .about-step p {
  margin: 0;
  padding: 0 18px 18px 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--moss);
}

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

/* 专题研究板 */
.page-about .about-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--about-hair);
}

.page-about .about-board-cover {
  background: linear-gradient(155deg, var(--wine), #4d1624 65%, var(--indigo));
  padding: clamp(24px, 4vw, 44px);
  color: var(--mist);
}

.page-about .about-board-cover .eyebrow--light {
  color: rgba(232, 240, 234, .75);
  margin-bottom: 14px;
}

.page-about .about-board-cover h2 {
  color: var(--mist);
}

.page-about .about-board-cover p {
  margin: 0;
  color: rgba(232, 240, 234, .84);
  line-height: 1.85;
  font-size: 15px;
  max-width: 32em;
}

.page-about .about-board-list {
  display: grid;
  gap: 1px;
  background: var(--line);
}

.page-about .about-board-item {
  background: var(--cabinet);
  padding: 20px 22px;
  transition: background .2s var(--ease);
}

.page-about .about-board-item:hover {
  background: var(--cabinet-lift);
}

.page-about .about-board-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--mist);
  font-weight: 700;
}

.page-about .about-board-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--moss);
}

/* 更新节奏 */
.page-about .about-clocks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-clock {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  border: var(--about-hair);
  background: var(--cabinet);
  border-top: 3px solid var(--line);
}

.page-about .about-clock:nth-child(1) {
  border-top-color: var(--slate);
}

.page-about .about-clock:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-clock:nth-child(3) {
  border-top-color: var(--lime);
}

.page-about .about-clock-time {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .about-clock h3 {
  margin: 0 0 10px;
  font-size: 19px;
  color: var(--mist);
  font-weight: 700;
}

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

.page-about .about-cadence-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 52em;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-about .about-cadence-note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(182, 255, 59, .4);
}

/* 时间线 */
.page-about .about-timeline-section {
  background: linear-gradient(180deg, rgba(41, 37, 92, .28), rgba(7, 30, 26, 0) 70%);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-about .about-jump .tag {
  font-family: var(--font-mono);
  text-decoration: none;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0 0 clamp(26px, 4vw, 44px);
  padding: 0 0 0 22px;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), var(--line) 40%, var(--line));
}

.page-about .about-timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--lime);
  box-sizing: border-box;
}

.page-about .about-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .02em;
  line-height: 1.1;
}

.page-about .about-milestone h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--mist);
  font-weight: 700;
}

.page-about .about-milestone p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--moss);
  max-width: 34em;
}

.page-about .about-timeline-figure {
  border-radius: var(--radius-lg);
}

/* 读者与联系 */
.page-about .about-reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

.page-about .about-reach-text .eyebrow {
  color: var(--lime);
  margin-bottom: 12px;
}

.page-about .about-reach-text p {
  color: var(--moss);
  line-height: 1.85;
  margin: 0 0 16px;
  max-width: 34em;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-contact-card {
  padding: 24px 22px;
  border-radius: var(--radius-lg);
  border: var(--about-hair);
  background: var(--cabinet);
  box-shadow: var(--about-shadow);
}

.page-about .about-contact-card h3 {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--mist);
  font-weight: 700;
}

.page-about .about-contact-list {
  margin: 0 0 16px;
  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 {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-contact-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .about-contact-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--slate);
  padding-top: 14px;
  border-top: var(--about-hair);
}

/* 键盘焦点 */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* 平板 */
@media (min-width: 680px) {
  .page-about .about-statband {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-role:nth-child(even) {
    transform: translateY(14px);
  }

  .page-about .about-role:nth-child(even):hover,
  .page-about .about-role:nth-child(even):focus-within {
    transform: translateY(10px);
  }

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

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

  .page-about .about-timeline li {
    grid-template-columns: 92px 1fr;
    gap: 18px;
    align-items: start;
  }
}

/* 桌面 */
@media (min-width: 920px) {
  .page-about .about-masthead-grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-folio {
    writing-mode: vertical-rl;
    letter-spacing: .34em;
    padding-top: 6px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 52px;
  }

  .page-about .about-origin-figure {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

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

  .page-about .about-role:nth-child(even) {
    transform: translateY(22px);
  }

  .page-about .about-role:nth-child(even):hover,
  .page-about .about-role:nth-child(even):focus-within {
    transform: translateY(18px);
  }

  .page-about .about-proof-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 48px;
  }

  .page-about .about-board {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  }

  .page-about .about-reach-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-board-item,
  .page-about .about-step {
    transition: none;
  }

  .page-about .about-role:hover,
  .page-about .about-role:focus-within {
    transform: none !important;
  }
}
<<<END>>>