.page-about {
  --about-rule: 1px solid var(--line-soft);
  --about-radius: 13px 4px 13px 4px;
  --about-glow: radial-gradient(120% 90% at 8% 0%, rgba(57, 230, 208, 0.14), transparent 62%),
    radial-gradient(110% 85% at 96% 12%, rgba(255, 107, 74, 0.15), transparent 66%);
  padding-bottom: 4rem;
}

.page-about .breadcrumb {
  margin: 1.5rem 0 0.75rem;
  font-size: 0.82rem;
}

.page-about .about-index {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.25rem 0 0.9rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--line-soft);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  color: var(--mist);
  font-size: 0.8rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--aqua);
  letter-spacing: 0.06em;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-color: rgba(255, 107, 74, 0.65);
  background: rgba(255, 107, 74, 0.09);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  gap: 1.75rem;
  padding: 1.5rem 0 2.25rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -6% 8% -6%;
  background: var(--about-glow);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero .page-head__title {
  font-size: clamp(1.9rem, 6.2vw, 3.15rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0.55rem 0 0.95rem;
  color: var(--paper);
}

.page-about .page-head__eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.28em;
  color: var(--aqua);
  text-transform: uppercase;
  margin: 0;
}

.page-about .page-head__lead {
  margin: 0;
  max-width: 52ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.9;
}

.page-about .about-hero__panel {
  display: grid;
  gap: 0.7rem;
}

.page-about .about-hero__panel .data-card {
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: linear-gradient(155deg, rgba(18, 63, 87, 0.6), rgba(6, 24, 38, 0.35));
}

.page-about .about-hero__panel .data-card__label {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero__panel .data-card__value {
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--coral);
  line-height: 1.3;
}

.page-about .about-hero__note {
  font-size: 0.78rem;
  color: rgba(143, 179, 196, 0.85);
  line-height: 1.6;
}

/* 章节通用 */
.page-about .about-section {
  display: grid;
  gap: 0.9rem;
  padding: 2.25rem 0;
  border-top: var(--about-rule);
  scroll-margin-top: 4.5rem;
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.page-about .about-rail__idx {
  font-family: var(--mono);
  font-size: 1.3rem;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--coral);
}

.page-about .about-rail__tag {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: var(--mist);
}

.page-about .about-section:target .about-rail__idx {
  color: var(--aqua);
}

.page-about .about-section:target .about-rail__tag {
  color: var(--paper);
}

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

.page-about .about-body__title {
  margin: 0 0 0.9rem;
  font-size: clamp(1.4rem, 4.8vw, 2rem);
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-body p {
  margin: 0 0 0.9rem;
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.95;
  max-width: 64ch;
}

.page-about .about-body__foot {
  margin-top: 1.35rem !important;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(255, 107, 74, 0.5);
}

.page-about .text-link {
  color: var(--aqua);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 230, 208, 0.45);
}

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

/* 图片容器 */
.page-about .media-frame {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__cap {
  padding: 0.55rem 0.8rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: rgba(6, 24, 38, 0.85);
  border-top: 1px solid var(--line-soft);
}

/* 01 起点 */
.page-about .about-origin {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.page-about .about-origin__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
  align-content: start;
}

.page-about .about-origin__points li {
  padding: 0.75rem 0.9rem;
  border-left: 2px solid var(--aqua);
  border-radius: 0 var(--about-radius);
  background: linear-gradient(90deg, rgba(57, 230, 208, 0.09), transparent 72%);
  color: var(--paper);
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-about .about-origin__points b {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--aqua);
  margin-bottom: 0.25rem;
}

/* 02 维护内容 */
.page-about .keep-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .keep {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 0.9rem;
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: linear-gradient(160deg, rgba(18, 63, 87, 0.5), rgba(6, 24, 38, 0.25));
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .keep:hover {
  border-color: rgba(255, 107, 74, 0.55);
  transform: translateY(-2px);
}

.page-about .keep__num {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--coral);
  padding-top: 0.22rem;
}

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

.page-about .keep__title {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  color: var(--paper);
  font-weight: 600;
}

.page-about .keep__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .keep__tag {
  grid-column: 2;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  color: var(--aqua);
}

/* 03 球队库更新时间线 */
.page-about .tl {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0 0 0 1.6rem;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--coral), var(--aqua) 55%, rgba(217, 231, 234, 0.14));
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 1.5rem;
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--aqua);
}

.page-about .tl__when {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--coral);
  margin-bottom: 0.25rem;
}

.page-about .tl__title {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  color: var(--paper);
  font-weight: 600;
}

.page-about .tl__desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 40ch;
}

/* 04 维护方法 */
.page-about .method-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .method-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
  align-content: start;
}

.page-about .method-step {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.9rem 0;
  border-bottom: 1px dashed rgba(217, 231, 234, 0.16);
}

.page-about .method-step:last-child {
  border-bottom: none;
}

.page-about .method-step__num {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--aqua);
  color: var(--ink-900);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.page-about .method-step__title {
  margin: 0 0 0.3rem;
  font-size: 0.98rem;
  color: var(--paper);
  font-weight: 600;
}

.page-about .method-step p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
}

/* 05 服务原则 */
.page-about .principles {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.75rem;
}

.page-about .principle {
  position: relative;
  padding: 1.1rem 1.1rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(57, 230, 208, 0.14), transparent 56%),
    radial-gradient(130% 120% at 100% 100%, rgba(255, 107, 74, 0.16), transparent 62%),
    rgba(11, 42, 61, 0.55);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  outline: none;
}

.page-about .principle:hover,
.page-about .principle:focus,
.page-about .principle:focus-visible {
  border-color: rgba(57, 230, 208, 0.55);
  box-shadow: 0 0 0 1px rgba(57, 230, 208, 0.18);
}

.page-about .principle__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--coral-soft);
}

.page-about .principle__title {
  margin: 0.35rem 0 0.4rem;
  font-size: 1.02rem;
  color: var(--paper);
  font-weight: 600;
}

.page-about .principle__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .principle__demo {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding-top: 0.55rem;
  border-top: 1px solid rgba(255, 180, 159, 0.25);
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--coral-soft);
  transition: max-height 0.35s var(--ease), opacity 0.3s var(--ease);
}

.page-about .principle:hover .principle__demo,
.page-about .principle:focus .principle__demo,
.page-about .principle:focus-within .principle__demo {
  max-height: 9rem;
  opacity: 1;
  margin-top: 0.7rem;
}

/* 06 下一步 */
.page-about .roadmap {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.page-about .roadmap__routes {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.page-about .route {
  display: block;
  padding: 0.9rem 1rem;
  border-left: 2px solid var(--coral);
  border-radius: 0 var(--about-radius);
  background: linear-gradient(90deg, rgba(255, 107, 74, 0.11), transparent 68%);
  text-decoration: none;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .route:hover,
.page-about .route:focus-visible {
  background: linear-gradient(90deg, rgba(255, 107, 74, 0.2), transparent 74%);
  border-left-color: var(--aqua);
}

.page-about .route__title {
  margin: 0 0 0.3rem;
  font-size: 0.98rem;
  color: var(--paper);
  font-weight: 600;
}

.page-about .route__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .route__more {
  display: inline-block;
  margin-top: 0.45rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--aqua);
}

/* 收束 */
.page-about .about-cta {
  display: grid;
  gap: 1rem;
  margin-top: 2.5rem;
  padding: 1.4rem 1.2rem;
  border: 1px solid rgba(255, 107, 74, 0.35);
  border-radius: var(--about-radius);
  background:
    radial-gradient(140% 140% at 100% 0%, rgba(255, 107, 74, 0.18), transparent 62%),
    radial-gradient(120% 120% at 0% 100%, rgba(57, 230, 208, 0.12), transparent 60%),
    rgba(11, 42, 61, 0.62);
}

.page-about .about-cta__title {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 52ch;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* 桌面端 */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 3rem;
    align-items: start;
    padding: 2rem 0 3rem;
  }

  .page-about .about-hero__panel {
    margin-top: 1.5rem;
  }

  .page-about .about-hero__panel .data-card:nth-child(2) {
    margin-left: 1rem;
  }

  .page-about .about-hero__panel .data-card:nth-child(3) {
    margin-left: 0.35rem;
  }

  .page-about .about-section {
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 2.25rem;
    padding: 3rem 0;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
    padding-top: 0.4rem;
  }

  .page-about .about-rail__tag {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .about-body__title {
    font-size: clamp(1.6rem, 2.3vw, 2.05rem);
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 1.5rem;
  }

  .page-about .keep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.25rem;
  }

  .page-about .keep:nth-child(even) {
    transform: translateY(1.1rem);
  }

  .page-about .keep:nth-child(even):hover {
    transform: translateY(0.85rem);
  }

  .page-about .tl {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
    padding: 1.75rem 0 0;
  }

  .page-about .tl::before {
    left: 0;
    right: 0;
    top: 5px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--coral), var(--aqua) 58%, rgba(217, 231, 234, 0.14));
  }

  .page-about .tl__item {
    padding: 1rem 0 0;
  }

  .page-about .tl__item::before {
    left: 0;
    top: calc(-1.75rem + 6px);
  }

  .page-about .tl__desc {
    max-width: none;
  }

  .page-about .method-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2rem;
    align-items: start;
  }

  .page-about .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.15rem;
  }

  .page-about .principles .principle:nth-child(even) {
    transform: translateY(1rem);
  }

  .page-about .roadmap {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 1.75rem;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 1.75rem 1.6rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .keep,
  .page-about .principle,
  .page-about .principle__demo,
  .page-about .route {
    transition-duration: 0.01ms;
  }

  .page-about .keep:hover,
  .page-about .keep:nth-child(even),
  .page-about .keep:nth-child(even):hover,
  .page-about .principles .principle:nth-child(even) {
    transform: none;
  }

  .page-about .principle__demo {
    max-height: none;
    opacity: 1;
    margin-top: 0.7rem;
  }
}
<<<END>>>