.page-about {
  --paint-line: rgba(57, 255, 20, 0.35);
  --paint-grid: repeating-linear-gradient(90deg, rgba(57, 255, 20, 0.05) 0 1px, transparent 1px 80px);
  --paint-slice: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
  background:
    radial-gradient(ellipse at 85% 0%, rgba(57, 255, 20, 0.08) 0%, transparent 45%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  color: var(--color-text);
  width: 100%;
  max-width: 100%;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(32px, 6vw, 72px) clamp(16px, 4vw, 56px) 0;
  max-width: calc(var(--max-w) + 96px);
  margin: 0 auto;
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-hero__copy {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin: 24px 0 12px;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-hero__title-main {
  color: var(--color-accent);
}

.page-about .about-hero__title-bar {
  color: var(--color-orange);
  font-size: 0.7em;
}

.page-about .about-hero__title-sub {
  font-size: 0.62em;
  color: var(--color-text);
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-dim);
  max-width: 58ch;
  margin: 0 0 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__visual .media {
  width: 100%;
  border: 1px solid var(--color-line);
  clip-path: var(--paint-slice);
  background: var(--color-card);
}

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

.page-about .about-hero__visual-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  background: rgba(11, 27, 58, 0.82);
  backdrop-filter: blur(6px);
  border: 1px solid var(--color-line);
  padding: 8px 12px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .about-hero__visual-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-dim);
}

.page-about .about-hero__stats {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--color-line);
  background: rgba(30, 42, 68, 0.55);
  position: relative;
}

.page-about .about-hero__stats:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
}

.page-about .about-hero__stat {
  margin: 0;
  padding: 18px 16px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-hero__stat:nth-child(2n) {
  border-right: 0;
}

.page-about .about-hero__stat:nth-child(n + 3) {
  border-bottom: 0;
}

.page-about .about-hero__stat dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-dim);
  margin-bottom: 6px;
}

.page-about .about-hero__stat dd {
  font-family: var(--font-head);
  font-size: 28px;
  color: var(--color-accent);
  margin: 0;
  letter-spacing: -0.01em;
}

.page-about .about-section-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0 0 34px;
}

.page-about .about-section-head__num {
  font-family: var(--font-head);
  font-size: 58px;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 2px var(--color-accent);
  opacity: 0.9;
  letter-spacing: -0.04em;
  flex-shrink: 0;
}

.page-about .about-section-head__line {
  border-left: 3px solid var(--color-accent);
  padding-left: 14px;
}

.page-about .about-section-head__line h2 {
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 4px;
  color: var(--color-text);
}

.page-about .about-section-head__line p {
  font-size: 13px;
  color: var(--color-dim);
  margin: 0;
}

.page-about section[id] {
  padding: 56px clamp(16px, 4vw, 56px);
  max-width: calc(var(--max-w) + 96px);
  margin: 0 auto;
}

.page-about .about-origin {
  background-image: var(--paint-grid);
  border-top: 1px solid var(--color-line);
}

.page-about .about-origin__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-origin__content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-dim);
  margin: 0 0 16px;
}

.page-about .about-origin__list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  border-top: 1px solid var(--color-line);
}

.page-about .about-origin__list li {
  position: relative;
  padding: 14px 0 14px 28px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-origin__list li:before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 20%, 80% 100%, 20% 80%);
}

.page-about .about-origin__aside {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-origin__card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  clip-path: var(--paint-slice);
  padding: 24px;
  position: relative;
}

.page-about .about-origin__card:before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 100%, 100% 0);
  opacity: 0.7;
}

.page-about .about-origin__card--accent {
  background: linear-gradient(135deg, rgba(57, 255, 20, 0.1), var(--color-card) 60%);
  border-color: rgba(57, 255, 20, 0.4);
}

.page-about .about-origin__card--accent:before {
  background: var(--color-orange);
}

.page-about .about-origin__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.page-about .about-origin__card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-dim);
  margin: 0;
}

.page-about .about-milestones {
  background: rgba(14, 33, 69, 0.6);
  border-top: 1px solid var(--color-line);
}

.page-about .about-milestones__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

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

.page-about .about-timeline__list:before {
  content: "";
  position: absolute;
  left: 20px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-cyan), var(--color-accent) 60%, var(--color-orange));
  opacity: 0.6;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 36px 56px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

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

.page-about .about-timeline__item:before {
  content: "";
  position: absolute;
  left: 11px;
  top: 4px;
  width: 20px;
  height: 20px;
  background: var(--color-bg);
  border: 3px solid var(--color-cyan);
  transform: rotate(45deg);
  border-radius: 2px;
}

.page-about .about-timeline__item--current:before {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 18px rgba(57, 255, 20, 0.55);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-cyan);
  letter-spacing: 0.04em;
  display: inline-block;
  width: -moz-fit-content;
  width: fit-content;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 4px 10px;
}

.page-about .about-timeline__item--current .about-timeline__year {
  color: var(--color-accent);
  background: rgba(57, 255, 20, 0.1);
  border-color: rgba(57, 255, 20, 0.45);
}

.page-about .about-timeline__body {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  padding: 18px 20px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .about-timeline__body h3 {
  font-family: var(--font-head);
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--color-text);
}

.page-about .about-timeline__body p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-dim);
  margin: 0;
}

.page-about .about-milestones__media .media {
  border: 1px solid var(--color-line);
  clip-path: var(--paint-slice);
  background: var(--color-card);
}

.page-about .about-milestones__media .media img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 7 / 5;
}

.page-about .about-milestones__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-dim);
  line-height: 1.6;
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--color-cyan);
}

.page-about .about-workflow {
  background-image: var(--paint-grid);
  border-top: 1px solid var(--color-line);
}

.page-about .about-workflow__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-workflow__main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-workflow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-workflow__step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  align-items: start;
  background: rgba(30, 42, 68, 0.72);
  border: 1px solid var(--color-line);
  padding: 20px 18px;
  position: relative;
}

.page-about .about-workflow__step:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent), var(--color-cyan));
}

.page-about .about-workflow__step-num {
  font-family: var(--font-head);
  font-size: 32px;
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .about-workflow__step-body h3 {
  font-family: var(--font-head);
  font-size: 17px;
  margin: 0 0 8px;
  color: var(--color-text);
}

.page-about .about-workflow__step-body p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-dim);
  margin: 0;
}

.page-about .about-workflow__media {
  border: 1px solid var(--color-line);
  clip-path: var(--paint-slice);
  background: var(--color-card);
}

.page-about .about-workflow__media img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-workflow__side {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.page-about .about-workflow__metric {
  background: linear-gradient(160deg, rgba(57, 255, 20, 0.12), var(--color-card));
  border: 1px solid rgba(57, 255, 20, 0.3);
  padding: 18px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 108px;
}

.page-about .about-workflow__metric-value {
  font-family: var(--font-head);
  font-size: 26px;
  color: var(--color-accent);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.page-about .about-workflow__metric-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-dim);
  margin-top: 8px;
}

.page-about .about-workflow__note {
  grid-column: 1 / -1;
  font-size: 13px;
  color: var(--color-dim);
  line-height: 1.6;
  border-left: 3px solid var(--color-orange);
  padding-left: 12px;
  margin: 4px 0 0;
}

.page-about .about-ecosystem {
  border-top: 1px solid var(--color-line);
  background: rgba(14, 33, 69, 0.5);
}

.page-about .about-ecosystem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-ecosystem__item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  padding: 24px 20px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-about .about-ecosystem__item:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42px;
  height: 14px;
  background: var(--color-accent);
  opacity: 0.5;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-ecosystem__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-cyan);
  letter-spacing: 0.1em;
}

.page-about .about-ecosystem__item h3 {
  font-family: var(--font-head);
  font-size: 20px;
  margin: 10px 0 8px;
  color: var(--color-text);
}

.page-about .about-ecosystem__item p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-dim);
  margin: 0;
}

.page-about .about-cta {
  max-width: calc(var(--max-w) + 96px);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 56px) 72px;
}

.page-about .about-cta__box {
  background: linear-gradient(120deg, rgba(57, 255, 20, 0.16), rgba(0, 229, 255, 0.1)), var(--color-card);
  border: 1px solid rgba(57, 255, 20, 0.4);
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
  padding: clamp(32px, 6vw, 64px);
  text-align: center;
  position: relative;
}

.page-about .about-cta__box:before {
  content: "KAIYUN // 2026";
  position: absolute;
  right: 24px;
  bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(57, 255, 20, 0.35);
}

.page-about .about-cta__box h2 {
  font-family: var(--font-head);
  font-size: clamp(22px, 4vw, 36px);
  margin: 0 0 12px;
  color: var(--color-text);
}

.page-about .about-cta__box p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-dim);
  max-width: 52ch;
  margin: 0 auto 24px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-hero__stat,
  .page-about .about-hero__stat:nth-child(2n) {
    border-right: 1px solid var(--color-line);
    border-bottom: 0;
  }

  .page-about .about-hero__stat:last-child {
    border-right: 0;
  }

  .page-about .about-origin__layout {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }

  .page-about .about-origin__aside {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-milestones__layout {
    grid-template-columns: 1fr 300px;
    align-items: start;
    gap: 44px;
  }

  .page-about .about-milestones__media {
    position: sticky;
    top: 32px;
  }

  .page-about .about-workflow__layout {
    grid-template-columns: 1fr 280px;
    align-items: start;
  }

  .page-about .about-workflow__main {
    grid-template-columns: 1fr;
  }

  .page-about .about-workflow__side {
    grid-template-columns: 1fr;
    align-content: start;
    position: sticky;
    top: 32px;
  }

  .page-about .about-workflow__metric {
    min-height: 92px;
  }

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

@media (min-width: 1080px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-hero__title {
    font-size: 46px;
  }

  .page-about .about-origin__aside {
    grid-template-columns: 1fr;
  }

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

  .page-about .about-timeline__item {
    grid-template-columns: 132px 1fr;
    gap: 20px;
    padding-left: 56px;
  }

  .page-about .about-timeline__year {
    width: auto;
    text-align: right;
  }
}