.page-about {
  --about-dark: #0A1F44;
  --about-deep: #07172E;
  --about-cream: #F5F4F0;
  --about-grey: #ECEBE6;
  --about-orange: #FF6B35;
  --about-gold: #FFD700;
  --about-ink: #1C1B1A;
  --about-muted: #6B7280;
  --about-line: #D1D5DB;
  background: var(--about-cream);
  color: var(--about-ink);
  overflow-x: clip;
}

.page-about .container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding-left: var(--content-pad);
  padding-right: var(--content-pad);
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h-mobile) + 60px);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ===== Hero ===== */
.page-about .about-hero {
  background: linear-gradient(135deg, var(--about-dark) 0%, var(--about-deep) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 8vw, 100px) 0 clamp(64px, 9vw, 120px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 88%);
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  right: -90px;
  top: 18%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.5), transparent 70%);
  filter: blur(36px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--data-font);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-orange);
  border: 1px solid rgba(255, 255, 255, 0.28);
  padding: 6px 12px;
}

.page-about .about-hero__no {
  font: 700 24px var(--data-font);
  color: rgba(255, 255, 255, 0.45);
}

.page-about .about-hero__main .breadcrumbs {
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-hero__main .breadcrumbs a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  transition: color var(--ease-fast);
}

.page-about .about-hero__main .breadcrumbs a:hover {
  color: var(--about-orange);
}

.page-about .about-hero__main .breadcrumbs .sep {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.4);
}

.page-about .about-hero__main .breadcrumbs [aria-current="page"] {
  color: var(--about-gold);
}

.page-about .about-hero__main h1 {
  font-family: var(--heading-font);
  font-size: var(--h1-size);
  line-height: 1.06;
  letter-spacing: -0.02em;
  max-width: 16em;
  margin: 0 0 0.45em;
  color: #fff;
}

.page-about .about-hero__lead {
  font-size: var(--body-size);
  line-height: 1.8;
  max-width: 42em;
  color: rgba(255, 255, 255, 0.84);
  margin: 0;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__meta span {
  display: inline-flex;
  align-items: center;
  font: 700 13px var(--data-font);
  color: var(--about-gold);
  border: 1px solid rgba(255, 215, 0, 0.35);
  border-radius: 100px;
  padding: 6px 14px;
}

.page-about .about-hero__scale {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-hero__scale li {
  font: 700 13px var(--data-font);
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  border-top: 2px solid rgba(255, 255, 255, 0.28);
  padding-top: 10px;
}

/* ===== Anchor nav ===== */
.page-about .about-anchor {
  position: sticky;
  top: var(--header-h-mobile);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(245, 244, 240, 0.96);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--about-line);
  padding: 0 max(20px, calc((100vw - var(--max-content)) / 2));
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-anchor::-webkit-scrollbar {
  display: none;
}

.page-about .about-anchor__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  font: 600 13px var(--body-font);
  color: var(--about-muted);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--ease-fast), border-color var(--ease-fast), background var(--ease-fast);
}

.page-about .about-anchor__link:hover {
  color: var(--about-ink);
  background: rgba(255, 107, 53, 0.06);
}

.page-about .about-anchor__link.is-active {
  color: var(--about-orange);
  border-bottom-color: var(--about-orange);
}

.page-about .about-anchor__num {
  font: 700 11px var(--data-font);
  color: var(--about-orange);
}

/* ===== Chapter label ===== */
.page-about .about-chapter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 700 13px var(--data-font);
  color: var(--about-orange);
  letter-spacing: 0.22em;
  margin-bottom: 16px;
}

.page-about .about-chapter::before {
  content: '';
  width: 34px;
  height: 2px;
  background: var(--about-orange);
}

.page-about .about-chapter--light {
  color: var(--about-gold);
}

.page-about .about-chapter--light::before {
  background: var(--about-gold);
}

.page-about .about-origin h2,
.page-about .about-milestones h2,
.page-about .about-team h2,
.page-about .about-ecosystem h2,
.page-about .about-trust h2 {
  font-family: var(--heading-font);
  font-size: var(--h2-size);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

/* ===== Origin ===== */
.page-about .about-origin {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--about-cream);
  position: relative;
}

.page-about .about-origin::before {
  content: '';
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.12), transparent 70%);
  pointer-events: none;
}

.page-about .about-legacy {
  font-family: var(--heading-font);
  font-size: 22px;
  line-height: 1.4;
  color: var(--about-muted);
  border-left: 3px solid var(--about-orange);
  padding-left: 16px;
  margin: 0;
}

.page-about .about-origin .col-8 > p {
  font-size: var(--body-size);
  line-height: 1.82;
  color: var(--about-ink);
  margin: 0 0 20px;
  max-width: 44em;
}

.page-about .about-origin .col-8 > p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-origin__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 44px;
}

.page-about .about-origin__fact {
  background: #fff;
  border-top: 3px solid var(--about-orange);
  box-shadow: 0 4px 20px rgba(7, 23, 46, 0.07);
  padding: 22px 22px 20px;
}

.page-about .about-origin__fact-index {
  display: inline-block;
  font: 700 13px var(--data-font);
  color: var(--about-orange);
  margin-bottom: 10px;
}

.page-about .about-origin__fact-title {
  display: block;
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-about .about-origin__fact p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-origin__fact a {
  color: var(--about-orange);
  text-decoration: none;
  font-weight: 600;
}

.page-about .about-origin__fact a:hover {
  text-decoration: underline;
}

/* ===== Milestones ===== */
.page-about .about-milestones {
  background: var(--about-grey);
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-milestones__intro {
  font-size: 17px;
  line-height: 1.65;
  color: var(--about-muted);
  margin: 0;
  max-width: 22em;
}

.page-about .about-milestones__map {
  margin: 0;
  background: var(--about-deep);
  border-left: 4px solid var(--about-orange);
  box-shadow: var(--shadow-panel);
}

.page-about .about-milestones__map img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-milestones__map figcaption {
  font: 13px var(--data-font);
  color: rgba(255, 255, 255, 0.72);
  padding: 10px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

/* ===== Timeline ===== */
.page-about .about-timeline {
  margin-top: 52px;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 18px;
  position: relative;
  padding-bottom: clamp(28px, 5vw, 52px);
}

.page-about .about-timeline__date {
  position: relative;
  text-align: right;
  padding-right: 20px;
}

.page-about .about-timeline__date::after {
  content: '';
  position: absolute;
  right: 0;
  top: 28px;
  bottom: -30px;
  width: 2px;
  background: var(--about-line);
}

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

.page-about .about-timeline__year {
  display: block;
  font: 700 clamp(22px, 3vw, 32px) var(--heading-font);
  color: var(--about-dark);
  line-height: 1;
}

.page-about .about-timeline__dot {
  position: absolute;
  right: -8px;
  top: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--about-orange);
  border: 3px solid var(--about-grey);
  box-shadow: 0 0 0 1px var(--about-orange);
  z-index: 3;
}

.page-about .about-timeline__card {
  position: relative;
  z-index: 1;
  background: #fff;
  border-top: 3px solid var(--about-orange);
  box-shadow: 0 6px 24px rgba(7, 23, 46, 0.08);
  padding: clamp(16px, 3vw, 24px);
  min-width: 0;
}

.page-about .about-timeline__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--body-font);
  color: inherit;
}

.page-about .about-timeline__trigger-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-timeline__trigger-text strong {
  font-family: var(--heading-font);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.3;
  color: var(--about-ink);
}

.page-about .about-timeline__trigger-text small {
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .about-timeline .accordion__icon {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--about-orange);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: 700 20px var(--data-font);
  transition: transform var(--ease-med), background var(--ease-fast);
}

.page-about .about-timeline .accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(45deg);
  background: var(--about-dark);
}

.page-about .about-timeline .accordion__inner {
  padding-top: 16px;
  border-top: 1px solid var(--about-line);
  margin-top: 14px;
}

.page-about .about-timeline__inner > p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink);
}

.page-about .about-timeline__inner-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-about .about-timeline__inner-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-ink);
  margin-bottom: 6px;
}

.page-about .about-timeline__inner-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--about-orange);
}

.page-about .about-timeline__inner a {
  color: var(--about-orange);
  text-decoration: none;
  font-weight: 600;
}

.page-about .about-timeline__inner a:hover {
  text-decoration: underline;
}

/* ===== Team ===== */
.page-about .about-team {
  background: var(--about-cream);
  padding: clamp(64px, 10vw, 120px) 0;
}

.page-about .about-team .col-5 > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-muted);
  margin: 0 0 28px;
}

.page-about .about-team__figure {
  margin: 0;
  background: var(--about-deep);
  border-right: 3px solid var(--about-orange);
  box-shadow: var(--shadow-panel);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 36px;
}

.page-about .about-stat {
  background: #fff;
  border-top: 1px solid var(--about-line);
  border-bottom: 3px solid var(--about-orange);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform var(--ease-fast), box-shadow var(--ease-fast);
}

.page-about .about-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(7, 23, 46, 0.08);
}

.page-about .about-stat__number {
  font: 700 clamp(34px, 4vw, 50px) var(--data-font);
  color: var(--about-dark);
  line-height: 1;
}

.page-about .about-stat__number::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--about-orange);
  margin-left: 8px;
  border-radius: 1px;
}

.page-about .about-stat__label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  margin: 10px 0 4px;
}

.page-about .about-stat__note {
  display: block;
  font-size: 13px;
  color: var(--about-muted);
}

.page-about .about-team__capability {
  margin-bottom: 28px;
}

.page-about .about-team__capability h3 {
  font-family: var(--heading-font);
  font-size: 24px;
  margin: 0 0 16px;
}

.page-about .about-process {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-process li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  border-bottom: 1px solid var(--about-line);
  padding: 15px 0;
}

.page-about .about-process__step {
  font: 700 14px var(--data-font);
  color: var(--about-orange);
  padding-top: 2px;
  letter-spacing: 0.06em;
}

.page-about .about-process li p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink);
}

.page-about .about-team__note {
  background: rgba(255, 107, 53, 0.08);
  border-left: 3px solid var(--about-orange);
  padding: 16px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink);
  margin: 0;
}

/* ===== Ecosystem ===== */
.page-about .about-ecosystem {
  background: var(--about-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: clamp(64px, 10vw, 120px) 0;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .about-ecosystem::before {
  content: '';
  position: absolute;
  right: -120px;
  bottom: -80px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-ecosystem h2 {
  color: #fff;
}

.page-about .about-ecosystem__lead {
  color: rgba(255, 255, 255, 0.7);
  font-size: 17px;
  line-height: 1.7;
  margin: 0;
  max-width: 24em;
}

.page-about .about-ecosystem__grid {
  margin-top: 4px;
}

.page-about .about-eco-card {
  background: rgba(255, 255, 255, 0.06);
  border-top: 2px solid var(--about-orange);
  padding: 28px;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  transition: background var(--ease-med), transform var(--ease-med);
}

.page-about .about-eco-card:hover {
  background: rgba(255, 255, 255, 0.11);
  transform: translateY(-4px);
}

.page-about .about-eco-card__num {
  font: 700 clamp(40px, 5vw, 64px) var(--data-font);
  color: var(--about-orange);
  line-height: 1;
}

.page-about .about-eco-card__num::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 1px;
  background: var(--about-gold);
  margin-left: 8px;
}

.page-about .about-eco-card h3 {
  font: 600 19px var(--body-font);
  color: #fff;
  margin: 16px 0 8px;
}

.page-about .about-eco-card p {
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-ecosystem__map {
  margin: 40px 0 0;
  background: var(--about-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-ecosystem__map img {
  display: block;
  width: 100%;
  object-fit: cover;
}

/* ===== Trust ===== */
.page-about .about-trust {
  background: var(--about-cream);
  padding: clamp(64px, 10vw, 120px) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-trust__head p {
  color: var(--about-muted);
  font-size: 17px;
  line-height: 1.7;
  margin: 0 0 36px;
  max-width: 38em;
}

.page-about .about-trust__grid {
  row-gap: 20px;
}

.page-about .about-trust__item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--about-gold);
  padding: 24px;
  height: 100%;
  box-shadow: 0 2px 12px rgba(7, 23, 46, 0.04);
  transition: box-shadow var(--ease-fast), transform var(--ease-fast);
}

.page-about .about-trust__item:hover {
  box-shadow: 0 10px 28px rgba(7, 23, 46, 0.08);
  transform: translateY(-2px);
}

.page-about .about-trust__icon {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 215, 0, 0.16);
  border: 1px solid rgba(255, 215, 0, 0.55);
  color: #B8860B;
  font: 700 19px var(--data-font);
}

.page-about .about-trust__item h3 {
  font-size: 17px;
  line-height: 1.4;
  margin: 0 0 8px;
}

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

.page-about .about-trust__statement {
  margin: 44px auto 0;
  max-width: 48em;
  text-align: center;
  font-size: 16px;
  line-height: 1.95;
  color: var(--about-dark);
  background: #fff;
  border-left: 4px solid var(--about-orange);
  box-shadow: 0 4px 20px rgba(7, 23, 46, 0.05);
  padding: 28px 32px;
}

.page-about .about-trust__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 30px;
}

.page-about .about-trust__cta .btn {
  min-width: 150px;
  justify-content: center;
}

/* ===== Responsive: ≥640px ===== */
@media (min-width: 640px) {
  .page-about .about-origin__facts {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .about-timeline__item {
    grid-template-columns: 100px 1fr;
    gap: 24px;
  }
}

/* ===== Responsive: ≥900px ===== */
@media (min-width: 900px) {
  .page-about [id] {
    scroll-margin-top: 88px;
  }

  .page-about .about-hero {
    padding: clamp(96px, 12vw, 150px) 0 clamp(80px, 11vw, 130px);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 64px), 0 100%);
  }

  .page-about .about-hero__grid {
    grid-template-columns: 0.7fr 3fr 1.3fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 22px;
    border-left: 1px solid rgba(255, 255, 255, 0.22);
    padding-left: 20px;
  }

  .page-about .about-hero__tag {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.32em;
    font-size: 12px;
    padding: 14px 8px;
  }

  .page-about .about-hero__no {
    font-size: 32px;
  }

  .page-about .about-hero__scale {
    display: flex;
    flex-direction: column;
    gap: 14px;
    border-left: 1px solid rgba(255, 255, 255, 0.24);
    padding-left: 16px;
  }

  .page-about .about-hero__scale li {
    font-size: 14px;
    text-align: left;
    border-top: 0;
    border-left: 2px solid rgba(255, 255, 255, 0.26);
    padding: 4px 0 4px 12px;
  }

  .page-about .about-anchor {
    top: 0;
  }

  .page-about .about-anchor__link {
    padding: 16px 24px;
    font-size: 14px;
  }

  .page-about .about-origin .content-grid {
    align-items: start;
  }

  .page-about .about-team .content-grid {
    align-items: start;
  }

  .page-about .about-timeline {
    margin-top: 64px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 120px 1fr;
    gap: 36px;
  }

  .page-about .about-timeline__card {
    padding: 24px 28px;
  }

  .page-about .about-timeline__trigger-text strong {
    font-size: 24px;
  }

  .page-about .about-process li {
    grid-template-columns: 80px 1fr;
  }
}