.page-about {
  --about-line: rgba(198, 207, 203, 0.24);
  --about-line-strong: rgba(198, 207, 203, 0.48);
  --about-aside: minmax(168px, 232px);

  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  padding-bottom: calc(var(--sp) * 8);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: calc(var(--sp) * 1);
  padding: calc(var(--sp) * 5) 0 calc(var(--sp) * 2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb__link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

.page-about .breadcrumb__sep {
  color: var(--about-line-strong);
}

.page-about .breadcrumb__current {
  color: var(--cyan);
}

/* 首屏 */
.page-about .about-hero {
  padding: calc(var(--sp) * 3) 0 clamp(40px, 6vw, 88px);
  border-top: 2px solid var(--pine);
  margin-top: calc(var(--sp) * 2);
}

.page-about .about-hero__stamp {
  margin: 0 0 calc(var(--sp) * 4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 13ch;
}

.page-about .about-hero__foot {
  margin-top: clamp(32px, 6vw, 72px);
  display: grid;
  gap: calc(var(--sp) * 5);
}

.page-about .about-hero__lede {
  margin: 0;
  padding-left: calc(var(--sp) * 2.5);
  border-left: 2px solid var(--cyan);
  font-size: clamp(16.5px, 1.5vw, 19px);
  line-height: 1.78;
  color: var(--silver);
  max-width: 48ch;
}

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

.page-about .about-hero__stats .stat {
  display: flex;
  align-items: baseline;
  gap: calc(var(--sp) * 2);
  padding: calc(var(--sp) * 2) 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
  min-width: 2.4ch;
}

.page-about .about-hero__stats .stat__label {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

/* 章节骨架 */
.page-about .about-chapter {
  border-top: 2px solid var(--pine);
  padding: clamp(40px, 6vw, 88px) 0;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: calc(var(--sp) * 4);
}

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

.page-about .about-chapter__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  padding-bottom: calc(var(--sp) * 1.5);
  border-bottom: 1px solid var(--about-line-strong);
}

.page-about .about-chapter__title {
  margin: calc(var(--sp) * 2) 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-chapter__kicker {
  margin: calc(var(--sp) * 1.5) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-about .about-chapter__main .prose {
  margin: 0 0 calc(var(--sp) * 3);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 46ch;
}

.page-about .about-chapter__main .note {
  margin: calc(var(--sp) * 3) 0 0;
  padding-left: calc(var(--sp) * 2);
  border-left: 2px solid var(--orange);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 46ch;
}

/* 服务对象条目 */
.page-about .about-facts {
  list-style: none;
  margin: calc(var(--sp) * 4) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-strong);
}

.page-about .about-facts > li {
  display: grid;
  grid-template-columns: 2.8em minmax(0, 1fr);
  gap: calc(var(--sp) * 1.5);
  padding: calc(var(--sp) * 2.25) 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-facts__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-facts strong {
  color: var(--white);
  font-weight: 600;
}

/* 赛季阶段切换 */
.page-about .about-stage {
  margin-top: calc(var(--sp) * 4);
}

.page-about .about-stage .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-stage .tab {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 2px solid var(--pine);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  padding: 11px 18px;
  min-height: 44px;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-stage .tab:hover {
  color: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

.page-about .about-stage .tab[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-stage .tab:focus-visible {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 2px;
}

.page-about .about-stage__panel {
  padding: calc(var(--sp) * 3.5) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 46ch;
}

.page-about .about-stage__panel[hidden] {
  display: none;
}

.page-about .about-stage__panel p {
  margin: 0;
}

/* 图片容器 */
.page-about .about-figure {
  margin: calc(var(--sp) * 5) 0 0;
  border: var(--edge);
  box-shadow: var(--shadow-hard);
  background: var(--panel);
}

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

.page-about .about-figure .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* 团队角色 */
.page-about .about-roles {
  list-style: none;
  margin: calc(var(--sp) * 4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line-strong);
  border: var(--edge);
}

.page-about .about-role {
  background: var(--panel);
  padding: calc(var(--sp) * 3);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  background: var(--pine);
  transform: translateY(-4px);
}

.page-about .about-role__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-role__name {
  margin: calc(var(--sp) * 1.5) 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-role__desc {
  margin: calc(var(--sp) * 1) 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-role__tag {
  display: inline-block;
  margin-top: calc(var(--sp) * 2);
  padding: 5px 12px;
  border: 1px solid var(--about-line-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

/* 编辑感引文 */
.page-about .about-quote {
  margin: 0;
  padding: clamp(40px, 7vw, 96px) 0;
  border-top: 2px solid var(--pine);
  border-bottom: 2px solid var(--pine);
  background: linear-gradient(180deg, rgba(0, 229, 192, 0.06), rgba(0, 229, 192, 0) 72%);
}

.page-about .about-quote__inner {
  max-width: 880px;
  margin: 0 auto;
}

.page-about .about-quote__text {
  margin: 0;
  padding-left: calc(var(--sp) * 3);
  border-left: 3px solid var(--orange);
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.2vw, 34px);
  line-height: 1.6;
  color: var(--white);
  max-width: 30ch;
}

.page-about .about-quote__src {
  margin: calc(var(--sp) * 2.5) 0 0;
  padding-left: calc(var(--sp) * 3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* 生产流程 */
.page-about .about-flow {
  list-style: none;
  margin: calc(var(--sp) * 4) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line-strong);
}

.page-about .about-flow > li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: calc(var(--sp) * 2);
  padding: calc(var(--sp) * 3) 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-flow__no {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-flow__title {
  margin: 0 0 calc(var(--sp) * 0.75);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 48ch;
}

/* 客户场景 */
.page-about .about-scenes {
  list-style: none;
  margin: calc(var(--sp) * 4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: calc(var(--sp) * 2);
}

.page-about .about-scene {
  border: 1px solid var(--about-line-strong);
  border-top: 3px solid var(--cyan);
  background: var(--panel);
  padding: calc(var(--sp) * 3);
}

.page-about .about-scene__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-scene__desc {
  margin: calc(var(--sp) * 1.25) 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* 结尾行动区 */
.page-about .about-cta {
  border-top: 2px solid var(--pine);
  padding: clamp(40px, 6vw, 80px) 0 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: calc(var(--sp) * 4);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 18ch;
}

.page-about .about-cta__text {
  margin: calc(var(--sp) * 1.5) 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 44ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--sp) * 1.5);
}

/* 断点 */
@media (min-width: 720px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .about-hero__foot {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: calc(var(--sp) * 10);
    align-items: end;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-aside) minmax(0, 1fr);
    gap: calc(var(--sp) * 9);
  }

  .page-about .about-chapter__aside {
    position: sticky;
    top: calc(var(--ticker-h) + 32px);
    align-self: start;
  }

  .page-about .about-figure--half {
    width: 66%;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
    gap: calc(var(--sp) * 8);
  }
}

@media (min-width: 1240px) {
  .page-about .about-chapter__grid {
    gap: calc(var(--sp) * 12);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-stage .tab,
  .page-about .breadcrumb__link {
    transition: none;
  }

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