.page-about {
  --about-cut: 18px;
  --about-rule: rgba(243, 239, 230, .09);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: 0;
  text-wrap: balance;
}

.page-about h1 { font-size: clamp(30px, 7.2vw, 60px); }
.page-about h2 { font-size: clamp(24px, 4.6vw, 40px); }
.page-about h3 { font-size: clamp(17px, 2.4vw, 21px); }

.page-about p {
  margin: 0 0 1em;
  max-width: 68ch;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(14px, 3vw, 26px);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--steel);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: .35rem;
  color: rgba(141, 152, 146, .5);
}

.page-about .about-crumb a {
  color: var(--steel);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--lime);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--cream);
}

/* ---------- 开场 ---------- */
.page-about .about-hero {
  padding-top: clamp(12px, 2.5vw, 24px);
}

.page-about .about-hero__frame {
  position: relative;
  background: var(--deep);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 42px));
}

.page-about .about-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: brightness(.72) saturate(.9);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(8, 13, 11, 0) 42%, rgba(8, 13, 11, .92) 100%),
    repeating-linear-gradient(90deg, var(--mesh) 0 1px, transparent 1px 48px);
}

.page-about .about-hero__copy {
  position: relative;
  z-index: 1;
  margin-top: -34px;
  padding: clamp(20px, 5vw, 36px);
  background: linear-gradient(155deg, var(--deep) 0%, var(--panel) 100%);
  border-left: 3px solid var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--lime);
  margin: 0 0 12px;
}

.page-about .about-hero__lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: rgba(243, 239, 230, .86);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .about-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(113, 230, 210, .06);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  line-height: 1.4;
}

.page-about .about-chip--lime {
  color: var(--lime);
  border-color: var(--line-strong);
  background: rgba(201, 255, 63, .08);
}

/* ---------- 通用分区 ---------- */
.page-about .about-section {
  padding-block: clamp(44px, 8vw, 92px);
}

.page-about .about-section__head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-section__lede {
  margin: 14px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  color: rgba(243, 239, 230, .72);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  padding-top: clamp(22px, 4vw, 38px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-index {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 68px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(201, 255, 63, .45);
}

.page-about .about-lead {
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.9;
  color: var(--cream);
}

.page-about .about-origin__body p {
  color: rgba(243, 239, 230, .78);
}

.page-about .about-quote {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: clamp(18px, 3vw, 28px) clamp(18px, 3vw, 32px);
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(230, 198, 140, .12), rgba(230, 198, 140, 0));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.85;
  color: var(--sand);
}

.page-about .about-quote p {
  margin: 0;
  max-width: none;
  color: inherit;
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-team__media {
  margin: 0;
  position: relative;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 28px));
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: brightness(.84) saturate(.92);
}

.page-about .about-team__media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 16px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: rgba(243, 239, 230, .82);
  background: linear-gradient(180deg, rgba(8, 13, 11, 0), rgba(8, 13, 11, .92));
}

.page-about .about-team__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .about-team__tab {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--about-rule);
  background: transparent;
  color: var(--steel);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-team__tab b {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-team__tab:hover,
.page-about .about-team__tab:focus-visible {
  color: var(--cream);
  border-color: var(--line);
}

.page-about .about-team__tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-about .about-team__tab[aria-selected="true"] b {
  color: var(--ink);
}

.page-about .about-team__panel {
  padding: clamp(18px, 3vw, 26px);
  margin-top: 12px;
  background: var(--panel);
  border: 1px solid var(--about-rule);
  border-left: 2px solid var(--mist);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-team__panel h3 {
  margin-bottom: 10px;
  color: var(--cream);
}

.page-about .about-team__panel p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  color: rgba(243, 239, 230, .78);
}

/* ---------- 节奏 ---------- */
.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.5vw, 22px);
}

.page-about .about-flow__step {
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(180deg, var(--panel) 0%, var(--deep) 100%);
  border-top: 2px solid var(--mist);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 22px));
}

.page-about .about-flow__step:nth-child(2) { border-top-color: var(--orange); }
.page-about .about-flow__step:nth-child(3) { border-top-color: var(--lime); }

.page-about .about-flow__time {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--steel);
}

.page-about .about-flow__step h3 {
  margin-bottom: 10px;
  color: var(--cream);
}

.page-about .about-flow__step p {
  margin: 0 0 18px;
  max-width: none;
  font-size: 15px;
  color: rgba(243, 239, 230, .76);
}

.page-about .about-flow__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--about-rule);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -.02em;
}

.page-about .about-stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2.5vw, 20px);
}

.page-about .about-timeline__item {
  position: relative;
  padding: clamp(18px, 3vw, 28px) clamp(18px, 3vw, 30px) clamp(18px, 3vw, 28px) clamp(56px, 8vw, 82px);
  background: var(--panel);
  border: 1px solid var(--about-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: clamp(20px, 3.2vw, 34px);
  top: clamp(18px, 3vw, 28px);
  bottom: clamp(18px, 3vw, 28px);
  width: 2px;
  background: linear-gradient(180deg, var(--lime), rgba(201, 255, 63, .06));
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: clamp(17px, 3.2vw, 31px);
  top: clamp(18px, 3vw, 28px);
  width: 8px;
  height: 8px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .about-timeline__tag {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-timeline__item h3 {
  margin-bottom: 8px;
  color: var(--cream);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  color: rgba(243, 239, 230, .76);
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-partners__body p {
  color: rgba(243, 239, 230, .78);
}

.page-about .about-partners__list {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-partners__list li {
  padding: 13px 0;
  border-bottom: 1px solid var(--about-rule);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(243, 239, 230, .78);
}

.page-about .about-partners__list li:first-child {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-partners__list strong {
  display: inline-block;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--lime);
  white-space: nowrap;
}

.page-about .about-partners__media {
  margin: 0;
  background: var(--panel);
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%, 0 16px);
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: brightness(.8) saturate(.92);
}

/* ---------- 收尾 ---------- */
.page-about .about-home {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-home__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(12px, 2vw, 18px);
  margin: clamp(20px, 3vw, 32px) 0 clamp(20px, 3vw, 30px);
}

.page-about .about-home__stat {
  padding: clamp(16px, 2.5vw, 24px);
  border-left: 2px solid var(--mist);
  background: rgba(113, 230, 210, .05);
}

.page-about .about-home__stat:nth-child(1) {
  border-left-color: var(--lime);
  background: rgba(201, 255, 63, .05);
}

.page-about .about-home__stat:nth-child(3) {
  border-left-color: var(--orange);
  background: rgba(255, 107, 44, .05);
}

.page-about .about-home__stat .about-stat__num {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(28px, 5vw, 40px);
}

.page-about .about-home__stat:nth-child(2) .about-stat__num { color: var(--mist); }
.page-about .about-home__stat:nth-child(3) .about-stat__num { color: var(--orange); }

.page-about .about-home p {
  color: rgba(243, 239, 230, .78);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 34px);
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 400px) {
  .page-about .about-hero__copy {
    padding: 18px 16px;
  }

  .page-about .about-chip {
    font-size: 11px;
    padding: 5px 11px;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__frame img {
    aspect-ratio: 16 / 9;
  }

  .page-about .about-hero__frame {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 56px));
  }

  .page-about .about-hero__copy {
    margin-top: -58px;
    margin-left: clamp(12px, 4vw, 56px);
  }

  .page-about .about-team__media img,
  .page-about .about-partners__media img {
    aspect-ratio: 16 / 11;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 820px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 28%) minmax(0, 1fr);
    gap: clamp(32px, 6vw, 88px);
  }

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

@media (min-width: 900px) {
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: clamp(28px, 5vw, 64px);
  }

  .page-about .about-team__tabs {
    margin-bottom: 20px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__copy {
    max-width: 880px;
  }

  .page-about .about-timeline__list {
    gap: 22px;
  }

  .page-about .about-timeline__item {
    margin-left: clamp(0px, 6vw, 90px);
  }

  .page-about .about-timeline__item:nth-child(2) {
    margin-left: clamp(0px, 2vw, 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}