.page-about {
  --about-sect: 56px;
  --about-line: 1px solid rgba(11, 34, 48, 0.13);
  --about-line-light: 1px solid rgba(169, 201, 191, 0.28);
  background: var(--rice);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding-bottom: 72px;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about h1,
.page-about h2,
.page-about h3,
.page-about h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  color: var(--deep-blue);
  letter-spacing: 0.01em;
}

.page-about p {
  margin: 0;
}

.page-about a {
  color: inherit;
}

.page-about .breadcrumbs {
  padding-top: 18px;
}

.page-about .section-label {
  margin-bottom: 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 30px 0 44px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(62, 142, 130, 0.16) 0%, rgba(244, 240, 230, 0) 62%),
    linear-gradient(180deg, var(--rice) 0%, var(--rice) 100%);
}

.page-about .about-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-about .about-hero__dot {
  width: 8px;
  height: 8px;
  background: var(--ember);
  transform: rotate(45deg);
  flex: none;
}

.page-about .about-hero__title {
  margin-top: 16px;
  font-size: clamp(2.2rem, 9vw, 4.6rem);
  line-height: 1.02;
  text-wrap: balance;
}

.page-about .about-hero__accent {
  display: block;
  color: var(--deep-teal);
  position: relative;
}

.page-about .about-hero__accent::after {
  content: "";
  display: block;
  width: 88px;
  height: 6px;
  margin-top: 10px;
  background: linear-gradient(90deg, var(--ember), var(--clay));
  clip-path: polygon(0 0, 100% 0, 94% 100%, 0 100%);
}

.page-about .about-hero__lead {
  margin-top: 22px;
  max-width: 60ch;
  font-size: 1rem;
  color: rgba(19, 28, 27, 0.86);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: rgba(11, 34, 48, 0.12);
  border: var(--about-line);
}

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

.page-about .about-fact__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--deep-blue);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__num span {
  font-size: 0.78rem;
  margin-left: 2px;
  color: var(--river);
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--deep-teal);
  border: 1px solid rgba(23, 76, 74, 0.28);
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color var(--ease), color var(--ease), background-color var(--ease);
}

.page-about .about-jump:hover,
.page-about .about-jump:focus-visible {
  border-color: var(--ember);
  color: var(--ember);
  background: rgba(201, 74, 36, 0.06);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: var(--about-sect) 0;
}

.page-about .about-h2 {
  font-size: clamp(1.75rem, 6vw, 2.9rem);
  line-height: 1.06;
  text-wrap: balance;
}

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

.page-about .about-subhead {
  margin: 34px 0 16px;
  font-size: 1.15rem;
  color: var(--deep-teal);
}

.page-about .about-inline-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 74, 36, 0.45);
  padding-bottom: 2px;
  transition: border-color var(--ease), color var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--deep-blue);
  border-color: var(--deep-blue);
}

.page-about .about-inline-link--light {
  color: var(--mist);
  border-color: rgba(169, 201, 191, 0.6);
}

.page-about .about-inline-link--light:hover,
.page-about .about-inline-link--light:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

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

.page-about .about-shot img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-shot figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__text p + p {
  margin-top: 14px;
}

.page-about .about-origin__text p {
  max-width: 62ch;
}

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

.page-about .about-audience__item {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--paper);
  border: var(--about-line);
  box-shadow: var(--shadow-card);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-audience__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--river);
}

.page-about .about-audience__title {
  margin: 8px 0 8px;
  font-size: 1.15rem;
  color: var(--deep-blue);
}

.page-about .about-audience__item p {
  font-size: 15px;
  color: rgba(19, 28, 27, 0.82);
}

/* ---------- 02 流程带 ---------- */
.page-about .about-band {
  padding: var(--about-sect) 0;
  background:
    radial-gradient(90% 70% at 0% 0%, rgba(62, 142, 130, 0.28) 0%, rgba(23, 76, 74, 0) 60%),
    linear-gradient(160deg, var(--deep-teal) 0%, var(--deep-blue) 100%);
  color: var(--paper);
}

.page-about .about-band__lead {
  margin-top: 16px;
  max-width: 56ch;
  font-size: 15px;
  color: rgba(251, 250, 247, 0.82);
}

.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(169, 201, 191, 0.24);
  border: var(--about-line-light);
}

.page-about .about-step {
  padding: 18px 16px 20px;
  background: rgba(11, 34, 48, 0.42);
}

.page-about .about-step__time {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--mist);
  border-bottom: 2px solid var(--ember);
  padding-bottom: 3px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-step__title {
  margin: 12px 0 8px;
  font-size: 1.2rem;
  color: var(--paper);
}

.page-about .about-step p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 250, 247, 0.78);
}

.page-about .about-band__foot {
  display: grid;
  gap: 24px;
  margin-top: 32px;
}

.page-about .about-shot--band img {
  border-color: rgba(169, 201, 191, 0.3);
}

.page-about .about-shot--band figcaption {
  color: rgba(169, 201, 191, 0.88);
}

.page-about .about-band__note {
  border-left: 2px solid var(--river);
  padding-left: 18px;
}

.page-about .about-band__note-title {
  font-size: 1.35rem;
  color: var(--paper);
  margin-bottom: 10px;
}

.page-about .about-band__note p {
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(251, 250, 247, 0.8);
}

.page-about .about-band__note p + p {
  margin-top: 10px;
}

/* ---------- 03 覆盖 ---------- */
.page-about .about-coverage {
  background: linear-gradient(180deg, var(--rice) 0%, var(--haze) 140%);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-coverage__text p {
  max-width: 60ch;
}

.page-about .about-coverage__text p + p {
  margin-top: 14px;
}

.page-about .about-sports {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-sport {
  padding: 6px 13px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.page-about .about-sport--football { background: var(--river); color: var(--paper); }
.page-about .about-sport--basket { background: var(--deep-blue); color: var(--paper); }
.page-about .about-sport--tennis { background: var(--clay); color: var(--paper); }
.page-about .about-sport--volley { background: var(--moss); color: var(--paper); }
.page-about .about-sport--badminton { background: var(--stone); color: var(--paper); }
.page-about .about-sport--pingpong { background: var(--ember); color: var(--paper); }

/* ---------- 04 团队 ---------- */
.page-about .about-team__lead {
  margin-top: 16px;
  max-width: 64ch;
  font-size: 15.5px;
  color: rgba(19, 28, 27, 0.84);
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 20px 18px 22px;
  background: var(--paper);
  border: var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: rgba(62, 142, 130, 0.55);
  box-shadow: var(--shadow-card);
}

.page-about .about-role__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--deep-teal);
  background: rgba(169, 201, 191, 0.42);
  padding: 3px 8px;
  display: inline-block;
}

.page-about .about-role__title {
  margin: 12px 0 8px;
  font-size: 1.2rem;
}

.page-about .about-role p {
  font-size: 14.5px;
  color: rgba(19, 28, 27, 0.82);
}

.page-about .about-authors {
  display: grid;
  gap: 22px;
  margin-top: 30px;
  padding: 24px 18px;
  background: var(--deep-blue);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-authors__title {
  font-size: 1.3rem;
  color: var(--paper);
}

.page-about .about-authors__text p {
  margin-top: 10px;
  font-size: 14.5px;
  color: rgba(251, 250, 247, 0.8);
}

.page-about .about-authors__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-authors__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.1;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.page-about .about-authors__cap {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(169, 201, 191, 0.85);
}

/* ---------- 05 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--rice);
}

.page-about .about-tl-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-about .about-tl-nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  text-decoration: none;
  color: var(--deep-blue);
  border: 1px solid rgba(11, 34, 48, 0.18);
  background: var(--paper);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-tl-nav a:hover,
.page-about .about-tl-nav a:focus-visible {
  color: var(--ember);
  border-color: var(--ember);
}

.page-about .about-tl {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--river) 0%, var(--mist) 52%, var(--clay) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 26px;
  scroll-margin-top: 96px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 7px;
  width: 14px;
  height: 14px;
  background: var(--paper);
  border: 2px solid var(--river);
  transform: rotate(45deg);
}

.page-about .about-tl__item:target::before {
  background: var(--ember);
  border-color: var(--ember);
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--deep-teal);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl__title {
  margin: 6px 0 8px;
  font-size: 1.15rem;
}

.page-about .about-tl__body p {
  font-size: 14.5px;
  max-width: 58ch;
  color: rgba(19, 28, 27, 0.82);
}

/* ---------- 06 合作 ---------- */
.page-about .about-partners {
  background: linear-gradient(180deg, var(--haze) 0%, var(--rice) 55%);
}

.page-about .about-partners__grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-partner {
  padding: 22px 18px 24px;
  background: var(--paper);
  border: var(--about-line);
  border-top: 3px solid var(--river);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-partner--wide {
  border-top-color: var(--clay);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--deep-blue);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner__title {
  margin: 12px 0 8px;
  font-size: 1.15rem;
}

.page-about .about-partner p {
  font-size: 14.5px;
  color: rgba(19, 28, 27, 0.82);
}

.page-about .about-partners__cta {
  margin-top: 24px;
  padding: 20px 0 0;
  border-top: var(--about-line);
  display: grid;
  gap: 14px;
}

.page-about .about-partners__cta p {
  max-width: 56ch;
  font-size: 15px;
}

.page-about .about-partners__cta .btn {
  justify-self: start;
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  padding: 40px 0 8px;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: 28px 20px;
  background: var(--paper);
  border: var(--about-line);
  border-left: 6px solid var(--ember);
  box-shadow: var(--shadow-card);
}

.page-about .about-cta__text p {
  margin-top: 12px;
  font-size: 15px;
  max-width: 52ch;
  color: rgba(19, 28, 27, 0.84);
}

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

.page-about .about-cta__actions .btn {
  flex: 0 1 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --about-sect: 68px;
    font-size: 17px;
  }

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

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

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

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

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

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

  .page-about .about-partner--wide {
    grid-column: 1 / -1;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 34px 28px;
  }
}

@media (min-width: 960px) {
  .page-about {
    --about-sect: 88px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
    gap: 42px;
  }

  .page-about .about-shot--hero {
    margin-top: 8px;
  }

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

  .page-about .about-band__foot {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: 40px;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .page-about .about-authors {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 34px;
    padding: 34px 30px;
  }

  .page-about .about-tl {
    padding-left: 0;
    margin-left: 0;
  }

  .page-about .about-tl::before {
    left: 118px;
  }

  .page-about .about-tl__item {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 46px;
    padding-bottom: 30px;
  }

  .page-about .about-tl__item::before {
    left: 112px;
    top: 8px;
  }

  .page-about .about-tl__year {
    text-align: right;
    font-size: 1.25rem;
  }

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

  .page-about .about-partner--wide {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump,
  .page-about .about-role,
  .page-about .about-inline-link,
  .page-about .about-tl-nav a {
    transition: none;
  }
}