.page-about {
  --about-ab: #FF6A00;
  --about-el: #00D4FF;
  --about-bg: #0A1F44;
  --about-bg-deep: #060F29;
  --about-border: #1A3A6E;
  --about-muted: #3D4B63;
  --about-text-sub: #E6EFFC;
  --about-white: #FFFFFF;
  --about-warning: #FFD166;
  --about-grad-end: #2E5A88;
  --about-font-headline: "Anton", "Impact", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-body: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  --about-header-height: 72px;
  --about-container-width: 1280px;
  --about-container-pad: 24px;
  --about-ease-fast: 200ms ease;
  --about-ease-base: 300ms ease;

  position: relative;
  background: var(--about-bg);
  color: var(--about-white);
  font-family: var(--about-font-body);
  overflow-x: hidden;
}

.page-about .section {
  padding: 48px 24px;
}

.page-about .section--narrow {
  max-width: 900px;
  margin: 0 auto;
}

.page-about .section-head__kind,
.page-about .about-hero__eyebrow,
.page-about .about-cta__eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-el);
  margin-bottom: 14px;
  clip-path: polygon(0 0, 94% 0, 100% 100%, 6% 100%);
  background: rgba(0, 212, 255, 0.08);
  padding: 6px 18px 6px 14px;
  border-left: 3px solid var(--about-ab);
}

.page-about .section-head--split {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 36px;
}

.page-about .section-head__title,
.page-about .about-hero__title,
.page-about .about-mission__title,
.page-about .about-journey__title,
.page-about .about-team__title,
.page-about .about-architecture__title,
.page-about .about-partners__title,
.page-about .about-cta__title {
  font-family: var(--about-font-headline);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--about-white);
  text-transform: uppercase;
}

/* ===== Hero ===== */
.about-hero {
  position: relative;
  padding: 0 24px 64px;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(0, 212, 255, 0.12) 0%, transparent 55%),
    linear-gradient(135deg, var(--about-bg-deep) 0%, var(--about-bg) 60%, #123061 100%);
}

.about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46%;
  height: 100%;
  background:
    repeating-linear-gradient(
      -45deg,
      transparent 0 12px,
      rgba(255, 106, 0, 0.15) 12px 13px
    );
  clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.about-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  max-width: var(--about-container-width);
  margin: 0 auto;
  gap: 40px;
  padding-top: 56px;
}

.about-hero__title {
  font-size: clamp(38px, 7.5vw, 72px);
  max-width: 9ch;
}

.about-hero__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-text-sub);
  max-width: 46ch;
  margin: 18px 0 0;
}

.about-hero__visual {
  position: relative;
  min-height: 260px;
}

.about-hero__shear {
  position: absolute;
  top: 20px;
  right: 0;
  width: 78%;
  height: 210px;
  background: linear-gradient(120deg, var(--about-grad-end) 0%, var(--about-el) 130%);
  clip-path: polygon(8% 0, 100% 0, 92% 100%, 0 100%);
  opacity: 0.16;
}

.about-hero__panel {
  position: absolute;
  right: 4%;
  bottom: 6px;
  width: 72%;
  background: rgba(255, 106, 0, 0.12);
  border: 1px solid rgba(255, 106, 0, 0.35);
  border-right: 0;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 100%, 28px 100%);
  padding: 22px 26px 22px 30px;
  backdrop-filter: blur(4px);
}

.about-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--about-ab);
}

.about-hero__panel-num {
  font-family: var(--about-font-headline);
  font-size: 42px;
  color: var(--about-warning);
  line-height: 1;
}

.about-hero__panel-text {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--about-text-sub);
  line-height: 1.6;
}

/* ===== Mission ===== */
.about-mission {
  position: relative;
}

.about-mission__title {
  font-size: clamp(30px, 5vw, 50px);
  margin-bottom: 28px;
}

.about-mission__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-mission__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-text-sub);
  margin: 0;
}

.about-mission__steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.about-mission__step {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--about-border);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 100%, 18px 100%);
  padding: 14px 22px;
}

.about-mission__step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: var(--about-ab);
  color: var(--about-white);
  font-size: 13px;
  font-weight: 700;
  clip-path: polygon(20% 0, 100% 0, 80% 100%, 0 100%);
  flex-shrink: 0;
}

.about-mission__step-text {
  margin: 0;
  font-size: 15px;
  color: var(--about-white);
}

/* ===== Journey ===== */
.about-journey {
  background: linear-gradient(180deg, var(--about-bg) 0%, var(--about-bg-deep) 100%);
  padding-bottom: 72px;
}

.about-journey__head {
  max-width: var(--about-container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px;
}

.about-journey__desc {
  color: var(--about-text-sub);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  max-width: 44ch;
}

.about-journey__timeline {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.about-journey__line {
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--about-el) 0%, var(--about-ab) 100%);
  opacity: 0.6;
  transform: translateX(-1px);
}

.about-journey__item {
  position: relative;
  display: flex;
  flex-direction: column;
  margin-left: 48px;
  padding: 22px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--about-border);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 14px) 100%, 0 100%);
}

.about-journey__item::before {
  content: "";
  position: absolute;
  left: -42px;
  top: 28px;
  width: 16px;
  height: 16px;
  background: var(--about-el);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.18);
}

.about-journey__year {
  display: inline-block;
  font-family: var(--about-font-headline);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--about-ab);
  margin-bottom: 8px;
}

.about-journey__item--highlight {
  border-color: rgba(255, 106, 0, 0.5);
  background: rgba(255, 106, 0, 0.06);
}

.about-journey__item--highlight .about-journey__year {
  color: var(--about-warning);
}

.about-journey__item-title {
  font-family: var(--about-font-headline);
  font-size: 22px;
  font-weight: 400;
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.about-journey__item-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text-sub);
}

/* ===== Team ===== */
.about-team {
  padding-bottom: 0;
}

.about-team__header {
  max-width: var(--about-container-width);
  margin: 0 auto;
  padding: 0 24px 32px;
}

.about-team__title {
  font-size: clamp(30px, 5vw, 50px);
  margin-bottom: 16px;
}

.about-team__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-text-sub);
  max-width: 60ch;
  margin: 0;
}

.about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: var(--about-container-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.about-team__card {
  position: relative;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
  border: 1px solid var(--about-border);
  clip-path: polygon(14px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  padding: 24px;
  transition: transform var(--about-ease-fast), border-color var(--about-ease-fast);
}

.about-team__card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.6);
}

.about-team__icon {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  font-family: var(--about-font-headline);
  font-size: 38px;
  color: var(--about-ab);
  margin-bottom: 10px;
}

.about-team__icon em {
  font-family: var(--about-font-body);
  font-style: normal;
  font-size: 13px;
  color: var(--about-el);
}

.about-team__name {
  font-family: var(--about-font-headline);
  font-size: 18px;
  font-weight: 400;
  margin: 0 0 8px;
  color: var(--about-white);
}

.about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-text-sub);
}

.about-team__figure {
  margin: 0;
  max-width: var(--about-container-width);
  padding: 0 24px 48px;
}

.about-team__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
  border: 1px solid var(--about-border);
}

.about-team__fig {
  margin-top: 12px;
  font-size: 13px;
  color: var(--about-muted);
  letter-spacing: 0.04em;
  transform: rotate(-90deg) translateX(-100%);
  transform-origin: left top;
  width: max-content;
  margin-left: 42px;
}

/* ===== Architecture ===== */
.about-architecture {
  background:
    linear-gradient(160deg, transparent 0%, rgba(0, 212, 255, 0.05) 60%, transparent 100%),
    var(--about-bg-deep);
  border-top: 1px solid var(--about-border);
  border-bottom: 1px solid var(--about-border);
  padding-bottom: 64px;
}

.about-architecture__head {
  max-width: var(--about-container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 24px;
}

.about-architecture__desc {
  color: var(--about-text-sub);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  max-width: 44ch;
}

.about-architecture__flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: var(--about-container-width);
  margin: 0 auto;
  padding: 24px;
}

.about-architecture__node {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--about-border);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 100%, 20px 100%);
  padding: 22px;
  flex: 1;
  transition: border-color var(--about-ease-fast);
}

.about-architecture__node:hover {
  border-color: var(--about-el);
}

.about-architecture__node-num {
  font-family: var(--about-font-headline);
  font-size: 13px;
  color: var(--about-el);
  letter-spacing: 0.16em;
}

.about-architecture__node-title {
  font-family: var(--about-font-headline);
  font-size: 20px;
  font-weight: 400;
  margin: 8px 0 10px;
}

.about-architecture__node-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-text-sub);
}

.about-architecture__arrow {
  font-family: var(--about-font-headline);
  font-size: 24px;
  color: var(--about-ab);
  text-align: center;
  line-height: 1;
  transform: rotate(90deg);
}

.about-architecture__figure {
  margin: 0;
  max-width: var(--about-container-width);
  padding: 0 24px;
}

.about-architecture__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, calc(100% - 8px) 100%, 0 calc(100% - 8px));
}

/* ===== Partners ===== */
.about-partners__inner {
  padding-bottom: 64px;
}

.about-partners__title {
  font-size: clamp(28px, 4.5vw, 46px);
  margin-bottom: 18px;
}

.about-partners__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-text-sub);
  margin: 0 0 30px;
  max-width: 62ch;
}

.about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-partners__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--about-ab);
}

.about-partners__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-text-sub);
}

.about-partners__badge {
  font-family: var(--about-font-headline);
  font-size: 14px;
  color: var(--about-el);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-partners__figure {
  margin: 36px 0 0;
  position: relative;
}

.about-partners__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 40px) 0, 100% 40px, 40px 100%, 0 calc(100% - 40px));
  border: 1px solid var(--about-border);
}

.about-partners__fig {
  margin-top: 14px;
  font-size: 13px;
  color: var(--about-muted);
  letter-spacing: 0.03em;
}

/* ===== CTA ===== */
.about-cta {
  background:
    repeating-linear-gradient(
      -45deg,
      rgba(255, 106, 0, 0.06) 0 10px,
      transparent 10px 20px
    ),
    var(--about-bg-deep);
}

.about-cta__inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: left;
}

.about-cta__title {
  font-size: clamp(28px, 4.5vw, 42px);
  margin-bottom: 24px;
}

.about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  padding: 14px 28px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 100%, 14px 100%);
  transition: transform var(--about-ease-fast), box-shadow var(--about-ease-fast);
  border: none;
  cursor: pointer;
}

.about-cta .btn--primary {
  background: linear-gradient(120deg, var(--about-ab) 0%, #FF8A3D 100%);
  color: var(--about-white);
}

.about-cta .btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255, 106, 0, 0.35);
}

.about-cta .btn--outline {
  background: transparent;
  border: 2px solid var(--about-el);
  color: var(--about-el);
}

.about-cta .btn--outline:hover {
  transform: translateY(-3px);
  background: rgba(0, 212, 255, 0.08);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.18);
}

/* ===== Breadcrumb ===== */
.about-breadcrumb {
  max-width: var(--about-container-width);
  margin: 0 auto;
  padding: 0 24px 48px;
}

.about-breadcrumb .breadcrumbs__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.about-breadcrumb .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.about-breadcrumb .breadcrumbs__item + .breadcrumbs__item::before {
  content: "›";
  color: var(--about-ab);
  font-size: 16px;
}

.about-breadcrumb .breadcrumbs__link {
  font-size: 13px;
  color: var(--about-el);
  text-decoration: none;
  letter-spacing: 0.06em;
}

.about-breadcrumb .breadcrumbs__link:hover {
  color: var(--about-ab);
}

.about-breadcrumb .breadcrumbs__link--current {
  color: var(--about-text-sub);
  cursor: default;
}

/* ===== 桌面断点 ===== */
@media (min-width: 768px) {
  .page-about .section {
    padding: 64px 24px;
  }

  .page-about .section-head--split {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    gap: 32px;
  }

  .page-about .section-head__desc,
  .page-about .about-journey__desc,
  .page-about .about-architecture__desc {
    text-align: right;
    flex-shrink: 0;
  }

  /* Hero */
  .about-hero__inner {
    flex-direction: row;
    align-items: center;
    gap: 60px;
    padding-top: 72px;
  }

  .about-hero__copy {
    flex: 1.1;
  }

  .about-hero__visual {
    flex: 1;
    min-height: 320px;
  }

  .about-hero__shear {
    height: 260px;
    width: 92%;
  }

  /* Mission */
  .about-mission__body {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }

  .about-mission__text {
    flex: 1 1 calc(50% - 12px);
  }

  .about-mission__steps {
    flex: 1 1 100%;
    flex-direction: row;
  }

  .about-mission__step {
    flex: 1;
  }

  /* Journey */
  .about-journey__timeline {
    gap: 0;
  }

  .about-journey__item {
    width: calc(50% - 40px);
    margin-left: 0;
  }

  .about-journey__item--left {
    margin-right: auto;
    margin-left: 0;
  }

  .about-journey__item--right {
    margin-left: auto;
    margin-right: 0;
  }

  .about-journey__line {
    left: 50%;
    transform: translateX(-50%) translateX(-1px);
  }

  .about-journey__item::before {
    left: auto;
    right: -51px;
  }

  .about-journey__item--right::before {
    right: auto;
    left: -51px;
  }

  /* Team */
  .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .about-team__figure {
    padding: 0 24px 64px;
  }

  /* Architecture */
  .about-architecture__flow {
    flex-direction: row;
    align-items: stretch;
  }

  .about-architecture__arrow {
    transform: none;
    display: flex;
    align-items: center;
  }

  /* Partners */
  .about-partners__list {
    flex-direction: row;
    gap: 16px;
  }

  .about-partners__item {
    flex: 1;
  }

  /* CTA */
  .about-cta__inner {
    text-align: left;
  }
}

/* ===== 大屏 ===== */
@media (min-width: 1100px) {
  .about-team__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-hero__panel {
    width: 62%;
    bottom: 20px;
  }

  .about-hero__shear {
    height: 300px;
  }

  .about-hero__visual {
    min-height: 380px;
  }
}