.page-about {
  --about-axis-left: 56px;
  --about-muted: var(--txt-steel);
  --about-panel: rgba(18, 49, 94, 0.48);
  --about-panel-soft: rgba(18, 49, 94, 0.32);
  --about-hairline: rgba(45, 226, 230, 0.28);
  --about-hairline-bright: rgba(198, 255, 0, 0.5);
  position: relative;
  overflow-x: hidden;
  color: var(--txt-ice);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(circle at 88% 12%, rgba(45, 226, 230, 0.08), transparent 27%),
    radial-gradient(circle at 12% 46%, rgba(198, 255, 0, 0.05), transparent 22%),
    linear-gradient(125deg, rgba(18, 49, 94, 0.35) 0%, transparent 42%);
}

.about-hero {
  position: relative;
  padding: 36px 20px 72px;
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 0 64%, rgba(198, 255, 0, 0.1) 67%, transparent 72%);
}

.about-hero__inner {
  position: relative;
  display: grid;
  gap: 30px;
  max-width: 1280px;
  margin: 0 auto;
}

.about-hero__kicker {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--line-cyan);
  border-left: 3px solid var(--acc-green);
  padding-left: 10px;
  line-height: 1.4;
}

.about-hero h1 {
  margin: 18px 0 20px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.about-hero__lead {
  max-width: 720px;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--txt-steel);
}

.about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.about-stat {
  position: relative;
  padding: 16px 14px 13px;
  border: 1px solid var(--about-hairline);
  border-radius: var(--radius);
  background: rgba(10, 20, 40, 0.72);
  transform: rotate(-1.2deg);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

.about-stat:nth-child(2n) {
  transform: rotate(1.4deg);
}

.about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.1;
  color: var(--acc-green);
}

.about-stat__label {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  color: var(--txt-steel);
}

.about-hero__visual {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(45, 226, 230, 0.3);
  background: var(--bg-stadium);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

.about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, var(--bg-deep) 0%, transparent 46%);
  pointer-events: none;
}

.about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
  filter: saturate(1.25);
}

.about-archive {
  position: relative;
  max-width: 1360px;
  margin: 0 auto;
  padding: 32px 20px 90px;
}

.about-archive__axis {
  display: none;
}

.about-archive__sections {
  position: relative;
}

.about-section {
  position: relative;
  padding: 46px 18px 40px;
  border-bottom: 1px dashed rgba(45, 226, 230, 0.18);
  scroll-margin-top: 70px;
}

.about-section:last-child {
  border-bottom: 0;
}

.about-section__mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border: 2px solid var(--acc-green);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--acc-green);
  background: var(--bg-deep);
}

.about-section__panel .section-head {
  margin-bottom: 18px;
}

.about-section__panel .section-head__title {
  font-size: clamp(24px, 3vw, 36px);
}

.about-section__panel > p {
  line-height: 1.75;
  color: var(--txt-steel);
  margin: 0 0 16px;
  max-width: 860px;
}

.about-brand-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 8px;
}

.about-pillar {
  position: relative;
  padding: 20px 18px 16px;
  border: 1px solid rgba(45, 226, 230, 0.16);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--about-panel-soft), rgba(10, 20, 40, 0.66));
  transition: border-color 0.35s var(--ease);
}

.about-pillar:nth-child(2n) {
  transform: translateY(4px);
}

.about-pillar__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--acc-orange);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}

.about-pillar h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
}

.about-pillar p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--txt-steel);
}

.about-pillar:hover {
  border-color: var(--acc-green);
}

.about-matrix__layout {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.about-matrix__copy {
  min-width: 0;
}

.about-tag-list {
  margin: 18px 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.about-tag-list li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--txt-ice);
  display: flex;
  align-items: center;
  gap: 8px;
}

.about-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.about-dot--league {
  background: var(--acc-orange);
}

.about-dot--team {
  background: var(--acc-green);
}

.about-dot--date {
  background: var(--line-cyan);
}

.about-matrix__note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 8px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: rgba(18, 49, 94, 0.4);
  border-left: 3px solid var(--acc-green);
  font-size: 14px;
  line-height: 1.6;
  color: var(--txt-ice);
}

.about-matrix__figure,
.about-update__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(45, 226, 230, 0.2);
  background: var(--bg-stadium);
}

.about-matrix__figure img,
.about-update__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about-matrix__figure img {
  aspect-ratio: 4 / 3;
}

.about-update__figure img {
  aspect-ratio: 1 / 1;
}

.about-update__layout {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.about-update__copy > p {
  color: var(--txt-steel);
  line-height: 1.75;
}

.about-update__list {
  margin-top: 18px;
  border-top: 1px solid var(--about-hairline);
}

.about-update-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 2px;
  border-bottom: 1px dashed rgba(45, 226, 230, 0.22);
}

.about-update-item__key {
  font-size: 14px;
  color: var(--txt-steel);
}

.about-update-item__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  color: var(--acc-green);
}

.about-milestone__accordion {
  margin-top: 18px;
  border-top: 1px solid var(--about-hairline);
}

.about-milestone__accordion .accordion__item {
  border-bottom: 1px solid rgba(45, 226, 230, 0.18);
}

.about-milestone__accordion .accordion__trigger {
  position: relative;
  width: 100%;
  padding: 18px 52px 18px 2px;
  background: transparent;
  border: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  text-align: left;
  color: var(--txt-ice);
  cursor: pointer;
  transition: color 0.3s var(--ease);
}

.about-milestone__accordion .accordion__trigger::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 26px;
  font-weight: 400;
  color: var(--acc-green);
  transition: transform 0.3s var(--ease);
}

.about-milestone__accordion .is-open .accordion__trigger {
  color: var(--acc-green);
}

.about-milestone__accordion .is-open .accordion__trigger::after {
  content: "–";
  color: var(--acc-orange);
}

.about-milestone__accordion .accordion__trigger:hover {
  color: var(--line-cyan);
}

.about-milestone__accordion .accordion__content {
  padding: 2px 14px 22px 2px;
  max-width: 860px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--txt-steel);
}

.about-ecology__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 8px;
}

.about-ecology__card {
  padding: 22px 20px;
  border: 1px solid rgba(45, 226, 230, 0.18);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--about-panel), rgba(10, 20, 40, 0.64));
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.about-ecology__card:hover {
  border-color: var(--acc-orange);
  transform: translateY(-3px);
}

.about-ecology__ico {
  display: block;
  font-size: 20px;
  color: var(--acc-orange);
  margin-bottom: 10px;
}

.about-ecology__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
}

.about-ecology__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--txt-steel);
}

.about-ecology__note {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 3px solid var(--acc-orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(255, 106, 0, 0.08);
  font-size: 14px;
  line-height: 1.7;
  color: var(--txt-ice);
}

.about-enter {
  padding: 64px 0 90px;
  background:
    repeating-linear-gradient(90deg, transparent 0, transparent 42px, rgba(45, 226, 230, 0.05) 42px, rgba(45, 226, 230, 0.05) 43px);
}

.about-enter__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.about-enter__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 22px;
}

.about-enter__link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  background: rgba(18, 49, 94, 0.42);
  border: 1px solid rgba(45, 226, 230, 0.14);
  border-radius: var(--radius);
  color: var(--txt-ice);
  text-decoration: none;
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease), background-color 0.35s;
}

.about-enter__link:hover,
.about-enter__link:focus-visible {
  border-color: var(--line-cyan);
  background: rgba(18, 49, 94, 0.7);
  transform: translateY(-5px);
}

.about-enter__arrow {
  font-size: 18px;
  color: var(--acc-green);
}

.about-enter__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
}

.about-enter__desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--txt-steel);
}

@media (min-width: 560px) {
  .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-brand-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-ecology__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-enter__links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 720px) {
  .about-archive {
    padding-left: 90px;
  }

  .about-archive__axis {
    display: block;
    position: absolute;
    top: 30px;
    bottom: 46px;
    left: var(--about-axis-left);
    width: 2px;
    background: repeating-linear-gradient(
      to bottom,
      rgba(45, 226, 230, 0.6) 0,
      rgba(45, 226, 230, 0.6) 2px,
      transparent 2px,
      transparent 62px
    );
    opacity: 0.8;
    pointer-events: none;
  }

  .about-archive__axis-num {
    position: absolute;
    right: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--txt-steel);
  }

  .about-archive__axis-num:nth-child(1) {
    top: 0;
  }

  .about-archive__axis-num:nth-child(2) {
    top: 20%;
  }

  .about-archive__axis-num:nth-child(3) {
    top: 40%;
  }

  .about-archive__axis-num:nth-child(4) {
    top: 60%;
  }

  .about-archive__axis-num:nth-child(5) {
    top: 80%;
  }

  .about-archive__axis-num:nth-child(6) {
    top: 96%;
  }

  .about-section {
    padding: 52px 30px 52px 22px;
  }

  .about-section__mark {
    position: absolute;
    top: 64px;
    left: calc(var(--about-axis-left) - 19px);
    margin: 0;
  }

  .about-matrix__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .about-update__layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
  }
}

@media (min-width: 860px) {
  .about-hero {
    padding: 44px 32px 88px;
  }

  .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    align-items: end;
    gap: 48px;
  }

  .about-hero__visual {
    margin-bottom: -14px;
  }

  .about-hero__copy {
    padding-top: 18px;
  }
}

@media (min-width: 1024px) {
  .about-enter__links {
    grid-template-columns: repeat(5, 1fr);
  }

  .about-ecology__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-brand-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}