.page-about {
  position: relative;
  display: block;
  overflow-x: clip;
  background: var(--ink-900);
  color: var(--text-body);
  font-family: var(--ff-sans);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-about p {
  margin: 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(34px, 7vw, 92px)) 0 clamp(44px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(880px 520px at 88% -14%, rgba(74, 46, 143, 0.62), transparent 64%),
    radial-gradient(700px 460px at -8% 110%, rgba(34, 224, 210, 0.13), transparent 68%),
    linear-gradient(180deg, var(--ink-900) 0%, #0B1230 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  top: -22%;
  right: -18%;
  width: min(660px, 78vw);
  aspect-ratio: 1 / 1;
  background: linear-gradient(142deg, rgba(34, 224, 210, 0.2), rgba(58, 169, 255, 0.07) 44%, transparent 72%);
  clip-path: polygon(0 0, 100% 0, 100% 76%, 16% 100%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
}

.page-about .about-hero h1 {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 15ch;
  letter-spacing: -0.02em;
  color: var(--text-hi);
}

.page-about .about-hero__lead {
  margin-top: clamp(18px, 2.6vw, 28px);
  max-width: 62ch;
  font-size: var(--fs-18);
  line-height: 1.8;
  color: var(--text-body);
}

.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stats__item {
  background: rgba(18, 26, 62, 0.86);
  padding: clamp(16px, 2.4vw, 22px) clamp(18px, 2.4vw, 24px);
}

.page-about .about-stats__item:first-child .about-stats__value {
  color: var(--cyan);
}

.page-about .about-stats__item:last-child .about-stats__value {
  color: var(--orange);
}

.page-about .about-stats__value {
  display: block;
  font-family: var(--ff-mono);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--text-idx);
}

/* ---------- 通用区块 ---------- */

.page-about .about-section {
  position: relative;
  padding: clamp(56px, 8vw, 108px) 0;
}

.page-about .about-section--tight {
  padding: clamp(44px, 6vw, 78px) 0;
}

.page-about .about-section--alt {
  background: linear-gradient(180deg, var(--ink-900) 0%, #0C1430 46%, var(--ink-900) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-section__head {
  max-width: 68ch;
}

.page-about .about-section__head h2 {
  margin: 12px 0 0;
  font-size: clamp(23px, 3.3vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-section__lead {
  margin-top: 16px;
  font-size: var(--fs-16);
  line-height: 1.82;
  color: var(--text-body);
}

/* ---------- 三条约定 ---------- */

.page-about .about-why {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-why__item {
  background: var(--ink-900);
  padding: clamp(22px, 3vw, 32px) 0;
}

.page-about .about-why__num {
  display: block;
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
}

.page-about .about-why__title {
  margin: 10px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-why__item p {
  margin-top: 10px;
  max-width: 44ch;
  line-height: 1.82;
}

/* ---------- 时间带 ---------- */

.page-about .about-journey-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .media-frame__inner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-line {
  position: relative;
  list-style: none;
  margin: clamp(32px, 4.6vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 58%, rgba(74, 46, 143, 0) 100%);
}

.page-about .about-line__item {
  position: relative;
  padding-left: 34px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .about-line__item:first-child {
  margin-top: 0;
}

.page-about .about-line__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(180, 255, 69, 0.13);
}

.page-about .about-line__body {
  max-width: 66ch;
}

.page-about .about-line__num {
  display: block;
  font-family: var(--ff-mono);
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-line__title {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-line__body p {
  margin-top: 12px;
  line-height: 1.82;
}

.page-about .about-line__facts {
  margin-top: 14px !important;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 团队 ---------- */

.page-about .about-crew {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-crew__band {
  background: linear-gradient(180deg, rgba(18, 26, 62, 0.88), rgba(10, 16, 41, 0.72));
  padding: clamp(22px, 3.4vw, 34px) clamp(18px, 2.6vw, 28px);
}

.page-about .about-crew__count {
  display: block;
  font-family: var(--ff-mono);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .about-crew__count--a {
  color: var(--cyan);
}

.page-about .about-crew__count--b {
  color: var(--orange);
}

.page-about .about-crew__count--c {
  color: var(--lime);
}

.page-about .about-crew__role {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-crew__band p {
  margin-top: 12px;
  line-height: 1.82;
}

.page-about .about-crew__hint {
  margin-top: auto;
  padding-top: 18px;
  font-size: var(--fs-13);
  letter-spacing: 0.06em;
  color: var(--text-idx);
}

/* ---------- 内容分层 ---------- */

.page-about .about-structure {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-structure__figure {
  margin: 0;
}

.page-about .about-structure__text p + p {
  margin-top: 14px;
}

.page-about .about-structure__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-structure__list li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-15);
  line-height: 1.7;
}

.page-about .about-structure__list .mono {
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-structure__more {
  margin-top: 22px;
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  margin-top: clamp(28px, 4vw, 46px);
}

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

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-flow__step:hover {
  border-color: rgba(34, 224, 210, 0.5);
  transform: translateX(4px);
}

.page-about .about-flow__num {
  font-family: var(--ff-mono);
  font-size: var(--fs-24);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-flow__step p {
  max-width: 48ch;
  font-size: var(--fs-15);
  line-height: 1.8;
}

.page-about .about-flow__figure {
  margin: 0;
}

/* ---------- 三项承诺 ---------- */

.page-about .about-covenant {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-covenant__item {
  position: relative;
  padding: clamp(22px, 3vw, 32px) clamp(20px, 2.8vw, 34px);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 26, 62, 0.85), rgba(10, 16, 41, 0.55));
}

.page-about .about-covenant__idx {
  display: block;
  font-size: var(--fs-13);
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-covenant__title {
  margin: 10px 0 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-covenant__item p {
  margin-top: 10px;
  max-width: 52ch;
  font-size: var(--fs-15);
  line-height: 1.82;
}

/* ---------- 收束带 ---------- */

.page-about .about-next {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  background:
    radial-gradient(620px 320px at 94% 6%, rgba(255, 122, 46, 0.16), transparent 66%),
    radial-gradient(560px 300px at 4% 96%, rgba(34, 224, 210, 0.1), transparent 70%),
    linear-gradient(140deg, rgba(18, 26, 62, 0.95), rgba(10, 16, 41, 0.92));
}

.page-about .about-next__intro h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-about .about-next__intro p {
  margin-top: 14px;
  max-width: 46ch;
  font-size: var(--fs-15);
  line-height: 1.82;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: center;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--text-hi);
  font-size: var(--fs-16);
  text-decoration: none;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.page-about .about-next__link:hover {
  background: rgba(34, 224, 210, 0.08);
  padding-left: 14px;
  color: var(--cyan);
}

.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-next__arrow {
  color: var(--orange);
  font-family: var(--ff-mono);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-why__item {
    padding: clamp(24px, 3vw, 32px) clamp(20px, 2.4vw, 30px);
  }

  .page-about .about-why__item:first-child {
    padding-left: 0;
  }

  .page-about .about-why__item:last-child {
    padding-right: 0;
  }

  .page-about .about-line__item {
    padding-left: 40px;
  }
}

@media (min-width: 880px) {
  .page-about .about-why {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    background: none;
  }

  .page-about .about-why__item {
    border-left: 1px solid var(--line);
  }

  .page-about .about-why__item:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 28px);
    background: none;
    border-top: 0;
    border-bottom: 0;
  }

  .page-about .about-crew__band {
    display: flex;
    flex-direction: column;
    padding: clamp(22px, 2.6vw, 30px);
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(18, 26, 62, 0.82), rgba(10, 16, 41, 0.42));
  }

  .page-about .about-crew__band--b {
    margin-top: 42px;
  }

  .page-about .about-crew__band--c {
    margin-top: 86px;
  }

  .page-about .about-covenant {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(268px, 0.58fr);
    align-items: end;
  }

  .page-about .about-structure {
    grid-template-columns: minmax(0, 0.94fr) minmax(0, 1.06fr);
    align-items: center;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-flow__figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

  .page-about .about-line__item--wide .about-line__body {
    max-width: 74ch;
  }

  .page-about .about-line__item--narrow .about-line__body {
    max-width: 54ch;
  }

  .page-about .about-line__item--tight .about-line__body {
    max-width: 48ch;
  }
}

@media (min-width: 1200px) {
  .page-about .about-line__item {
    padding-left: 52px;
  }

  .page-about .about-line {
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-flow__step:hover {
    transform: none;
  }
}