.page-about {
  --about-soft: rgba(237, 243, 247, 0.82);
  --about-gap: clamp(1rem, 2.5vw, 1.75rem);
  display: block;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

/* ---------- 页内章节竖排标签 ---------- */
.page-about .rail {
  display: none;
}

@media (min-width: 1280px) {
  .page-about {
    padding-left: 88px;
  }

  .page-about .rail {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: fixed;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    padding: 10px 6px;
    border-radius: var(--radius-pill);
    background: rgba(4, 18, 31, 0.72);
    border: 1px solid var(--rule);
    backdrop-filter: blur(8px);
  }

  .page-about .rail__link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 5px;
    border-radius: var(--radius-sm);
    font-family: var(--font-serif);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--muted);
    text-decoration: none;
    transition: color 220ms var(--ease), background-color 220ms var(--ease);
  }

  .page-about .rail__link:hover,
  .page-about .rail__link:focus-visible {
    color: var(--ink);
    background: var(--glass);
  }

  .page-about .rail__num {
    font-family: var(--font-mono);
    font-size: 0.64rem;
    color: var(--cyan);
    letter-spacing: 0.04em;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  margin-top: clamp(1.1rem, 3vw, 1.9rem);
  margin-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(47, 243, 214, 0.055) 0 1px, transparent 1px 76px),
    radial-gradient(130% 85% at 82% 4%, rgba(47, 243, 214, 0.12), transparent 58%),
    radial-gradient(90% 70% at 0% 96%, rgba(255, 122, 47, 0.07), transparent 60%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0.6rem 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.25rem, 6.6vw, 4.2rem);
  line-height: 1.03;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--cyan);
  margin-top: 0.18em;
}

.page-about .about-hero__lead {
  max-width: 58ch;
  margin: 0 0 1.5rem;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.65rem;
  margin: 0 0 1.7rem;
  padding: 0;
}

.page-about .about-hero__facts li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--cyan-soft);
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  padding: 0.32rem 0.78rem;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-hero__shot {
  --shot-ratio: 16 / 9;
  margin: 0;
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: var(--tide);
  overflow: hidden;
  box-shadow: 0 30px 70px -34px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.page-about .about-hero__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

/* ---------- 01 赛季来路 ---------- */
.page-about .about-legacy__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

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

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(1.4rem, 3vw, 1.9rem) 2rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: -4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 243, 214, 0.55), rgba(47, 243, 214, 0.06));
}

.page-about .about-timeline__item:last-child::before {
  display: none;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 214, 0.13);
}

.page-about .about-timeline__mark {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .about-legacy__note {
  padding: clamp(1.35rem, 3vw, 2rem);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.page-about .about-legacy__stamp {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-legacy__pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  animation: about-pulse 2.4s ease-out infinite;
}

@keyframes about-pulse {
  0% { box-shadow: 0 0 0 0 rgba(47, 243, 214, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(47, 243, 214, 0); }
  100% { box-shadow: 0 0 0 0 rgba(47, 243, 214, 0); }
}

.page-about .about-legacy__note-text {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-legacy__note-text:last-child {
  margin-bottom: 0;
}

@media (min-width: 960px) {
  .page-about .about-legacy__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

/* ---------- 02 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.page-about .about-team__card {
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--tide);
  transition: border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-about .about-team__card[open] {
  border-color: var(--hairline);
  background: linear-gradient(170deg, rgba(47, 243, 214, 0.08), rgba(10, 42, 69, 0.95));
}

.page-about .about-team__summary {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  cursor: pointer;
  list-style: none;
  color: var(--cyan);
}

.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-team__card[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__role {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-team__detail {
  margin: 0.9rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .about-team__total {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.35rem;
  padding: 1.1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: linear-gradient(150deg, rgba(47, 243, 214, 0.18), rgba(46, 42, 107, 0.55));
}

.page-about .about-team__total-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .about-team__total-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}

@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 03 覆盖 ---------- */
.page-about .about-coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--rule);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.2rem 1.05rem;
  background: rgba(4, 18, 31, 0.92);
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat--warm .about-stat__num {
  color: var(--orange);
}

.page-about .about-stat__label {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .about-coverage__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-coverage__col {
  padding: clamp(1.15rem, 2.6vw, 1.7rem);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(10, 42, 69, 0.9), rgba(4, 18, 31, 0.92));
}

.page-about .about-coverage__col--court {
  background: linear-gradient(180deg, rgba(46, 42, 107, 0.6), rgba(4, 18, 31, 0.92));
}

.page-about .about-coverage__kind {
  margin: 0 0 0.55rem;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  color: var(--cyan-soft);
}

.page-about .about-coverage__kind--warm {
  color: var(--amber);
}

.page-about .about-coverage__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-coverage__foot {
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--orange);
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--about-soft);
}

@media (min-width: 800px) {
  .page-about .about-coverage__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-coverage__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 04 复核 ---------- */
.page-about .about-review__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
}

.page-about .about-review__steps {
  counter-reset: rev;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
}

.page-about .about-review__step {
  position: relative;
  padding: 1.1rem 1.2rem 1.1rem 3.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--tide);
}

.page-about .about-review__step::before {
  counter-increment: rev;
  content: "0" counter(rev);
  position: absolute;
  left: 1.15rem;
  top: 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-review__step h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-review__step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .about-review__step--key {
  border-color: rgba(255, 122, 47, 0.45);
  background: linear-gradient(140deg, rgba(255, 122, 47, 0.12), rgba(10, 42, 69, 0.95));
}

.page-about .about-review__step--key::before {
  color: var(--orange);
}

.page-about .about-review__shot {
  --shot-ratio: 16 / 9;
  margin: 0;
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--tide);
}

.page-about .about-review__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-about .about-review__grid {
    grid-template-columns: 0.95fr 1.05fr;
  }
}

/* ---------- 05 版本 ---------- */
.page-about .about-versions__shot {
  --shot-ratio: 3 / 2;
  margin: 0 0 clamp(1.4rem, 3vw, 2.2rem);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--tide);
}

.page-about .about-versions__shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-versions__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-version {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.15rem, 2.4vw, 1.6rem);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--tide);
}

.page-about .about-version--v1 {
  opacity: 0.74;
}

.page-about .about-version--v2 {
  border-color: var(--hairline);
  background: linear-gradient(170deg, rgba(47, 243, 214, 0.12), rgba(10, 42, 69, 0.95));
}

.page-about .about-version--v3 {
  border-style: dashed;
  border-color: rgba(255, 122, 47, 0.5);
  background: linear-gradient(170deg, rgba(255, 122, 47, 0.1), rgba(4, 18, 31, 0.95));
}

.page-about .about-version__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-version--v2 .about-version__label {
  color: var(--cyan);
}

.page-about .about-version--v3 .about-version__label {
  color: var(--orange);
}

.page-about .about-version__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-version__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--about-soft);
}

@media (min-width: 860px) {
  .page-about .about-versions__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 06 服务节奏 ---------- */
.page-about .about-service__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  padding: clamp(1.4rem, 4vw, 2.75rem);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(47, 243, 214, 0.12), transparent 55%),
    linear-gradient(180deg, rgba(10, 42, 69, 0.9), rgba(4, 18, 31, 0.94));
}

.page-about .about-service__lead {
  margin: 0.7rem 0 1.4rem;
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-service__cta {
  display: inline-block;
}

.page-about .about-service__list {
  display: grid;
  margin: 0;
}

.page-about .about-service__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.3rem;
  padding: 0.95rem 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-service__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-service__when {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-service__what {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.68;
  color: var(--about-soft);
}

@media (min-width: 560px) {
  .page-about .about-service__row {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    gap: 0.3rem 1.2rem;
  }

  .page-about .about-service__when {
    white-space: nowrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-service__panel {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

/* ---------- 07 之后 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-next__item {
  padding: clamp(1.15rem, 2.4vw, 1.6rem);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--tide);
}

.page-about .about-next__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .about-next__item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: clamp(1.2rem, 2.6vw, 1.7rem);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: var(--glass);
  text-decoration: none;
  transition: transform 260ms var(--ease), border-color 260ms var(--ease), background-color 260ms var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  background: var(--glass-strong);
}

.page-about .about-next__link-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-next__link-desc {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 底部索引 ---------- */
.page-about .about-index {
  margin-top: clamp(2.4rem, 5vw, 4rem);
}

.page-about .about-index .index-list {
  list-style: none;
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.page-about .about-index .index-list a {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-about .about-index .index-list a:hover,
.page-about .about-index .index-list a:focus-visible {
  border-color: var(--hairline);
  background: var(--glass);
}

.page-about .about-index .index-list__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
}

.page-about .about-index .index-list__desc {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--about-soft);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-legacy__pulse {
    animation: none;
  }

  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}