.page-about {
  --about-rail: 100px;
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .breadcrumbs {
  margin-top: clamp(18px, 3.5vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 40px);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 9vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  margin-top: clamp(44px, 8vw, 92px);
}

.page-about .about-head {
  max-width: 680px;
}

.page-about .page-about h2,
.page-about h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-text {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 208, 0.45);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--text);
  border-bottom-color: var(--orange);
}

/* ---------- 我们在做什么 ---------- */
.page-about .about-doing__grid {
  display: grid;
  gap: 26px;
}

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

.page-about .about-doing__aside {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px 10px 22px 10px;
  padding: 20px 20px 22px;
}

.page-about .about-aside__title {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
}

.page-about .about-scenes {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-scenes__item {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-scenes__dot {
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__figure {
  margin: 26px 0 36px;
}

.page-about .about-timeline__figure img,
.page-about .about-team__figure img,
.page-about .about-why__bg img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-timeline__figure img {
  border-radius: 20px;
  border: 1px solid var(--line);
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
  opacity: 0.55;
}

.page-about .timeline__node {
  position: relative;
  padding-bottom: 26px;
  min-width: 0;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, 0.12);
}

.page-about .timeline__node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 8px;
}

.page-about .timeline__season {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .timeline__title {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .timeline__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .timeline__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--orange);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

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

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

.page-about .about-team__figure img {
  border-radius: 24px 8px 24px 8px;
  border: 1px solid var(--line);
}

.page-about .ops {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .ops__block {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 20px;
}

.page-about .ops__block::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -60px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 227, 208, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .ops__block--a {
  border-radius: 24px 10px 24px 10px;
}

.page-about .ops__block--b {
  border-radius: 10px 24px 10px 24px;
  background: var(--lift);
}

.page-about .ops__block--c {
  border-radius: 24px 24px 10px 10px;
}

.page-about .ops__role {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .ops__count {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .ops__title {
  margin: 12px 0 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}

.page-about .ops__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 数字带 ---------- */
.page-about .about-band {
  margin-top: clamp(48px, 8vw, 96px);
  padding: clamp(34px, 6vw, 66px) 0;
  background:
    linear-gradient(115deg, rgba(20, 38, 60, 0.94), rgba(6, 12, 22, 0.94)),
    radial-gradient(circle at 82% 12%, rgba(255, 107, 44, 0.18), transparent 58%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
  margin: 26px 0 0;
}

.page-about .stats__item {
  min-width: 0;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .stats__label {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .stats__num {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(32px, 6vw, 68px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .rhythm {
  display: grid;
  gap: 0;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rhythm__item {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .rhythm__key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-band__more {
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 为什么选择我们 ---------- */
.page-about .about-why {
  position: relative;
  overflow: hidden;
  border-radius: 26px;
  border: 1px solid var(--line);
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 48px);
  background: var(--ink);
}

.page-about .about-why__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-why__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
}

.page-about .about-why__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 12, 22, 0.55), rgba(6, 12, 22, 0.92));
}

.page-about .about-why__inner {
  position: relative;
  z-index: 1;
}

.page-about .why-points {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-about .why-point {
  border-left: 2px solid var(--line);
  padding-left: 16px;
  min-width: 0;
}

.page-about .why-point__num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .why-point__title {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-about .why-point__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta {
  margin-top: clamp(30px, 5vw, 52px);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px;
}

.page-about .about-cta__text {
  margin: 0;
  flex: 1 1 260px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 880px) {
  .page-about .about-doing__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-doing__aside {
    margin-top: 34px;
  }

  .page-about .about-timeline__figure {
    margin: 30px 0 46px;
  }

  .page-about .timeline {
    padding-left: calc(var(--about-rail) + 28px);
  }

  .page-about .timeline::before {
    left: calc(var(--about-rail) - 1px);
  }

  .page-about .timeline__node {
    padding-bottom: 40px;
  }

  .page-about .timeline__node::before {
    left: calc(-28px - var(--about-rail));
    top: 8px;
  }

  .page-about .timeline__season {
    position: absolute;
    left: calc(-1 * var(--about-rail));
    top: 4px;
    width: 78px;
    text-align: right;
  }

  .page-about .timeline__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.22s var(--ease), opacity 0.22s var(--ease), margin 0.22s var(--ease);
    margin-top: 0;
  }

  .page-about .timeline__node:hover .timeline__note,
  .page-about .timeline__node:focus .timeline__note,
  .page-about .timeline__node:focus-within .timeline__note {
    max-height: 90px;
    opacity: 1;
    margin-top: 8px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .ops {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 18px;
  }

  .page-about .ops__block--b {
    transform: translateY(20px);
  }

  .page-about .ops__block--c {
    transform: translateY(-10px);
  }

  .page-about .stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px 26px;
  }

  .page-about .rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 46px;
  }

  .page-about .why-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-why {
    padding-inline: clamp(40px, 5vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__note {
    transition: none;
  }
}