.page-about {
  --about-line: #d9c4a0;
  --about-soft: rgba(107, 191, 58, 0.12);
  --about-yellow-soft: rgba(255, 214, 50, 0.28);
  background: var(--paper);
  color: var(--ink);
}

.page-about .breadcrumb {
  max-width: calc(var(--container) + 2rem);
  margin: 0 auto;
  padding: 1rem clamp(1rem, 4vw, 3rem) 0;
  font-size: 0.875rem;
}

.page-about a:focus-visible,
.page-about details summary:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: 2.5rem;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -140px;
  top: -100px;
  background: var(--about-soft);
  border-radius: 50%;
  pointer-events: none;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 2.5rem;
  position: relative;
  z-index: 1;
  padding-bottom: 3.5rem;
}
.page-about .about-hero__content {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 0.5rem;
}
.page-about .about-hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 7%;
  border: 2px dashed var(--kiwi-dark);
  border-radius: 50%;
  transform: rotate(14deg);
  pointer-events: none;
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: cover;
  border-radius: 50%;
  filter: saturate(1.05);
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 4rem;
  }
}

/* ===== 章节预览导航 ===== */
.page-about .about-chapter-nav {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding: 1rem var(--gutter);
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid rgba(242, 232, 213, 0.25);
  border-bottom: 1px solid rgba(242, 232, 213, 0.25);
  scrollbar-width: thin;
  scrollbar-color: var(--kiwi-bright) transparent;
}
.page-about .about-chapter-nav a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: rgba(255, 246, 229, 0.08);
  border: 1px solid transparent;
  color: var(--paper);
  font-size: 0.875rem;
  text-decoration: none;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.page-about .about-chapter-nav a:hover {
  background: var(--kiwi-bright);
  border-color: var(--kiwi-dark);
  color: var(--ink);
}
.page-about .about-chapter-nav a span {
  font-family: var(--font-data);
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}
.page-about .about-chapter-nav a:hover span {
  color: var(--ink);
}

/* ===== 奇异果体育场是谁 ===== */
.page-about .about-who__grid {
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
}
.page-about .about-who__text {
  font-size: 1rem;
  line-height: 1.85;
}
.page-about .about-who__text p + p {
  margin-top: 1rem;
}
.page-about .about-who__side {
  display: flex;
  align-items: flex-start;
}
.page-about .about-who__card {
  width: 100%;
  border-top: 6px solid var(--kiwi-bright);
}
.page-about .about-who__card-title {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
}
.page-about .about-who__list {
  margin: 0;
  padding: 0;
}
.page-about .about-who__row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--edge);
  font-size: 0.9375rem;
}
.page-about .about-who__row:last-child {
  border-bottom: none;
}
.page-about .about-who__row dt {
  color: var(--gray-ink);
}
.page-about .about-who__row dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
}
.page-about .about-who__icp {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--edge);
  font-size: 0.8125rem;
  color: var(--gray-ink);
  line-height: 1.6;
}
@media (min-width: 900px) {
  .page-about .about-who__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
    gap: 3rem;
  }
}

/* ===== 发展时间线 ===== */
.page-about .about-timeline__track {
  list-style: none;
  margin: 3rem 0 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--edge) 0 6px, transparent 6px 12px);
}
.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 0 16px;
  padding-bottom: 3rem;
  position: relative;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__year {
  grid-column: 1 / -1;
  font-family: var(--font-data);
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--kiwi-dark);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.page-about .about-timeline__node {
  grid-column: 1;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--kiwi-bright);
  border: 6px solid var(--card);
  box-shadow: 0 0 0 2px var(--kiwi-dark);
  margin-top: 0.25rem;
}
.page-about .about-timeline__card {
  grid-column: 2;
  background: var(--card);
  border: 1px solid var(--edge);
  padding: 1.1rem 1.5rem 1.25rem 1.25rem;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-about .about-timeline__card:hover,
.page-about .about-timeline__card:focus-within,
.page-about .about-timeline__item:target .about-timeline__card {
  border-color: var(--kiwi-dark);
  box-shadow: 4px 4px 0 var(--yellow);
}
.page-about .about-timeline__card summary {
  list-style: none;
  cursor: pointer;
  display: block;
}
.page-about .about-timeline__card summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__card summary h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  line-height: 1.4;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}
.page-about .about-timeline__card summary h3::after {
  content: "+";
  font-family: var(--font-data);
  font-weight: 400;
  font-size: 1.5rem;
  color: var(--kiwi-dark);
  flex: 0 0 auto;
  transition: transform 0.3s var(--ease);
}
.page-about .about-timeline__card[open] summary h3::after {
  transform: rotate(45deg);
}
.page-about .about-timeline__card p {
  margin: 0.8rem 0 0;
  color: var(--gray-ink);
  font-size: 0.9375rem;
  line-height: 1.75;
}

@media (min-width: 860px) {
  .page-about .about-timeline__track::before {
    left: 50%;
    transform: translateX(-1px);
  }
  .page-about .about-timeline__item {
    grid-template-columns: 1fr 56px 1fr;
    gap: 0;
    align-items: start;
    padding-bottom: 3.5rem;
  }
  .page-about .about-timeline__year {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    padding-right: 2rem;
    margin: 0.5rem 0 0;
    font-size: 3.6rem;
  }
  .page-about .about-timeline__node {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
    margin-top: 0.6rem;
  }
  .page-about .about-timeline__card {
    grid-column: 3;
    grid-row: 1;
    margin-top: 0;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__year {
    grid-column: 3;
    grid-row: 1;
    text-align: left;
    padding-right: 0;
    padding-left: 2rem;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__node {
    grid-column: 2;
    grid-row: 1;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 1;
    grid-row: 1;
  }
}

/* ===== 数据规模 ===== */
.page-about .about-data__panel {
  --panel-cut: 24px;
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
  background: var(--dark-block);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  clip-path: polygon(0 0, calc(100% - var(--panel-cut)) 0, 100% var(--panel-cut), 100% 100%, var(--panel-cut) 100%, 0 calc(100% - var(--panel-cut)));
}
.page-about .about-data__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  object-fit: cover;
  border: 1px solid rgba(255, 246, 229, 0.22);
}
.page-about .about-data__statlist {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.page-about .about-data__stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
  background: rgba(255, 246, 229, 0.07);
  border: 1px solid rgba(255, 246, 229, 0.14);
}
.page-about .about-data__num {
  font-family: var(--font-data);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}
.page-about .about-data__label {
  font-size: 0.8125rem;
  line-height: 1.45;
  color: rgba(242, 232, 213, 0.82);
}
.page-about .about-data__bar {
  margin-top: 0.5rem;
  height: 4px;
  background: rgba(255, 246, 229, 0.2);
  overflow: hidden;
}
.page-about .about-data__bar span {
  display: block;
  height: 100%;
  background: var(--kiwi-bright);
}
.page-about .about-data__bar--23 span { width: 92%; }
.page-about .about-data__bar--420 span { width: 88%; }
.page-about .about-data__bar--31 span { width: 76%; }
.page-about .about-data__bar--2 span { width: 96%; }
.page-about .about-data__bar--30 span { width: 82%; }

@media (min-width: 900px) {
  .page-about .about-data__panel {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 2.5rem;
  }
  .page-about .about-data__statlist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ===== 服务原则 ===== */
.page-about .about-principles__band {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
}
.page-about .about-principles__item {
  position: relative;
  background: var(--card);
  border-left: 6px solid var(--kiwi-bright);
  padding: 1.8rem 2rem;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.page-about .about-principles__item::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 18px;
  width: calc(100% - 36px);
  height: 5px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.page-about .about-principles__item:hover::after,
.page-about .about-principles__item:focus-within::after {
  transform: scaleX(1);
}
.page-about .about-principles__num {
  font-family: var(--font-data);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--kiwi-dark);
}
.page-about .about-principles__item h3 {
  margin: 0.35rem 0 0.7rem;
  font-family: var(--font-heading);
  font-size: 1.7rem;
  line-height: 1.2;
}
.page-about .about-principles__item p {
  margin: 0;
  color: var(--gray-ink);
  font-size: 0.9375rem;
  line-height: 1.75;
}
.page-about .about-principles__visual {
  margin-top: 2.5rem;
}
.page-about .about-principles__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  clip-path: polygon(2% 0, 100% 0, 98% 94%, 0 100%);
}

@media (min-width: 900px) {
  .page-about .about-principles__band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

/* ===== 品牌视觉母题 ===== */
.page-about .about-motive__panel {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  margin-top: 2.5rem;
}
.page-about .about-motive__kiwi {
  display: flex;
  justify-content: center;
}
.page-about .about-motive__svg {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  filter: drop-shadow(8px 8px 0 var(--about-yellow-soft));
}
.page-about .about-motive__copy {
  font-size: 0.975rem;
  line-height: 1.8;
}
.page-about .about-motive__copy p + p {
  margin-top: 1rem;
}

@media (min-width: 860px) {
  .page-about .about-motive__panel {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 3rem;
  }
}

/* ===== 结尾 CTA ===== */
.page-about .about-cta {
  margin-top: var(--section-space);
  background: var(--ink);
  color: var(--paper);
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  left: -140px;
  bottom: -160px;
  border: 32px solid var(--kiwi-bright);
  border-radius: 50%;
  opacity: 0.18;
  pointer-events: none;
}
.page-about .about-cta h2 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4.5vw, 2.9rem);
  line-height: 1.2;
}
.page-about .about-cta p {
  margin: 0;
  color: rgba(242, 232, 213, 0.78);
  line-height: 1.75;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.page-about .about-cta__actions .button--ghost {
  border-color: rgba(242, 232, 213, 0.6);
  color: var(--paper);
}
.page-about .about-cta__actions .button--ghost:hover {
  border-color: var(--kiwi-bright);
  color: var(--kiwi-bright);
}
.page-about .about-cta__actions .btn-arrow {
  color: var(--yellow);
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
}