.page-about .breadcrumbs {
  margin-top: clamp(14px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3.5vw, 40px) 0 clamp(24px, 4vw, 48px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(12px, 2.2vw, 20px);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 200;
  font-size: clamp(2rem, 6.6vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--cream);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 0;
  color: var(--mist);
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  max-width: 64ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(8px, 2vw, 18px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 16px 14px 18px;
  background: var(--indigo);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-stat__label {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 顶部横幅 ---------- */
.page-about .about-banner {
  margin: clamp(26px, 5vw, 52px) 0 0;
  padding: 0;
}

.page-about .about-banner__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--night);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-about .about-banner__cap {
  margin: 12px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--red);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 章节索引带 ---------- */
.page-about .about-toc {
  margin-top: clamp(30px, 6vw, 56px);
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
  background: linear-gradient(180deg, rgba(27, 18, 54, 0.7), rgba(11, 18, 36, 0));
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0;
  padding: 14px 0;
  list-style: none;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 4px 2px;
  font-size: 0.84rem;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-toc__list a .data-num {
  font-size: 0.7rem;
  color: var(--red);
}

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

/* ---------- 长卷章节 ---------- */
.page-about .chapters {
  padding: clamp(44px, 8vw, 96px) 0 clamp(30px, 6vw, 70px);
}

.page-about .chapter {
  position: relative;
  padding-left: 34px;
  padding-bottom: clamp(46px, 8vw, 84px);
  scroll-margin-top: 140px;
}

.page-about .chapter::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .chapter--last::before {
  background: linear-gradient(180deg, var(--line) 0%, var(--line) 55%, transparent 100%);
}

.page-about .chapter__dot {
  position: absolute;
  left: 2px;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--space);
  box-sizing: border-box;
  transition: background var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .chapter__dot::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--orange);
  transition: background var(--dur) ease;
}

.page-about .chapter:target .chapter__dot {
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 138, 61, 0.16);
}

.page-about .chapter__body {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
}

.page-about .chapter__body .section-title {
  margin: 0;
  color: var(--cream);
}

.page-about .chapter__body .prose {
  margin: 0;
  color: var(--mist);
}

/* ---------- 三条整理线 ---------- */
.page-about .worklines {
  display: grid;
  gap: 1px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-about .workline {
  background: var(--indigo);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: inset 0 0 0 0 var(--cyan);
  transition: box-shadow var(--dur) ease, background var(--dur) ease;
}

.page-about .workline:hover,
.page-about .workline:focus-within {
  background: var(--night);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-about .workline__idx {
  margin: 0 0 8px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-about .workline__name {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 2.4vw, 1.28rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .workline__desc {
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

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

.page-about .workline__fields li {
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
  border: 1px solid var(--edge);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-about .about-figure {
  margin: clamp(20px, 3.5vw, 34px) 0 0;
}

.page-about .about-figure .media-frame__img {
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure--strip .media-frame__img {
  aspect-ratio: 7 / 3;
}

/* ---------- 团队分工 ---------- */
.page-about .team-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-about .team-cell {
  background: var(--indigo);
  padding: clamp(16px, 3vw, 24px);
  display: grid;
  gap: 6px;
  align-content: start;
  border-left: 2px solid var(--line);
  transition: border-color var(--dur) ease, background var(--dur) ease, transform var(--dur) ease;
}

.page-about .team-cell:hover,
.page-about .team-cell:focus-within {
  border-left-color: var(--cyan);
  background: var(--night);
  transform: translateY(-4px);
}

.page-about .team-cell__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .team-cell__name {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .team-cell__share {
  margin: 0;
  font-size: 0.78rem;
  color: var(--orange);
}

.page-about .team-cell__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .tempo {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .tempo__item {
  padding: 16px 18px;
  border: 1px solid var(--edge);
  background: linear-gradient(120deg, rgba(27, 18, 54, 0.9), rgba(16, 28, 58, 0.5));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .tempo__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  color: var(--orange);
}

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

/* ---------- 历程阶段 ---------- */
.page-about .phases {
  display: grid;
  gap: 0;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--edge);
}

.page-about .phase {
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 18px;
  border-bottom: 1px solid var(--edge);
  border-left: 1px solid var(--edge);
  position: relative;
  transition: background var(--dur) ease, border-left-color var(--dur) ease;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 26px;
  width: 9px;
  height: 1px;
  background: var(--cyan);
  opacity: 0;
  transition: opacity var(--dur) ease;
}

.page-about .phase:hover {
  background: rgba(27, 18, 54, 0.55);
  border-left-color: var(--cyan);
}

.page-about .phase:hover::before {
  opacity: 1;
}

.page-about .phase__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-about .phase__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 66ch;
}

/* ---------- 合作与认可（奶油纸展签） ---------- */
.page-about .plate-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .plate {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--cream);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .plate__tag {
  position: absolute;
  top: 0;
  right: 18px;
  padding: 3px 9px 4px;
  background: var(--red);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.page-about .plate__num {
  margin: 8px 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
}

.page-about .plate__label {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #3A2C22;
}

/* ---------- 为什么选这里 ---------- */
.page-about .why-list {
  display: grid;
  gap: 0;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--edge);
}

.page-about .why-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--edge);
  display: grid;
  gap: 8px;
}

.page-about .why-item__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .why-item__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 64ch;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3.5vw, 32px);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .phase {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .phase__tag {
    text-align: right;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .chapter {
    padding-left: 72px;
    padding-bottom: clamp(56px, 7vw, 96px);
  }

  .page-about .chapter::before {
    left: 12px;
  }

  .page-about .chapter__dot {
    left: 6px;
  }

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

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

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-hero__title,
  .page-about .about-hero__lede {
    grid-column: 1;
  }

  .page-about .about-hero__inner > .eyebrow {
    grid-column: 1;
  }

  .page-about .about-stats {
    grid-column: 2;
    grid-row: 1 / span 3;
    align-self: end;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0;
  }
}

/* ---------- 大桌面 ---------- */
@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 18ch;
  }

  .page-about .about-toc__list {
    gap: 4px 34px;
  }
}

/* ---------- 减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .workline,
  .page-about .team-cell,
  .page-about .phase,
  .page-about .chapter__dot,
  .page-about .about-toc__list a {
    transition: none;
  }

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