.page-about {
  --about-pad: clamp(56px, 9vw, 128px);
  --about-gap: clamp(24px, 4vw, 44px);
  background: var(--ink-900);
  color: var(--bone);
  overflow-x: clip;
  position: relative;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.025em;
  word-break: break-word;
}

.page-about p {
  max-width: 38em;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55em;
  padding-top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .about-crumbs__sep {
  color: var(--line-hard);
}

.page-about .about-crumbs__now {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 34px 0 var(--about-pad);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  left: -12%;
  width: min(560px, 90vw);
  height: min(560px, 90vw);
  border-radius: 50%;
  background: radial-gradient(circle, var(--neon-dim), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(34px, 5vw, 60px);
}

.page-about .about-hero__title {
  margin: 20px 0 0;
  font-size: clamp(2.25rem, 7.4vw, 5rem);
  line-height: 0.99;
  letter-spacing: -0.04em;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--neon);
  position: relative;
}

.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08em;
  height: 0.06em;
  background: var(--neon);
  opacity: 0.55;
}

.page-about .about-hero__lede {
  margin-top: clamp(18px, 2.4vw, 26px);
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-hero__stack {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  padding: 18px 20px 18px 22px;
  background: var(--glass);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--line-hard);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-stat:hover {
  border-left-color: var(--neon);
  transform: translateX(4px);
}

.page-about .about-stat--neon {
  border-left-color: var(--neon);
}

.page-about .about-stat--amber {
  border-left-color: var(--amber);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-stat__value {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1.1;
  color: var(--bone);
  letter-spacing: 0.02em;
}

.page-about .about-stat--neon .about-stat__value {
  color: var(--neon);
}

.page-about .about-stat--amber .about-stat__value {
  color: var(--amber);
}

.page-about .about-stat__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  position: relative;
  padding: var(--about-pad) 0;
}

.page-about .about-section > .band {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-section .eyebrow {
  margin: 0;
}

.page-about .about-section .lede {
  margin-top: 16px;
  color: var(--mist);
  line-height: 1.85;
}

/* ---------- 品牌主张 ---------- */
.page-about .about-claim {
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900) 78%);
}

.page-about .about-claim__grid {
  display: grid;
  gap: clamp(32px, 5vw, 58px);
}

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

.page-about .about-claim__text::before {
  content: "02";
  position: absolute;
  top: -0.34em;
  right: -0.04em;
  font-family: var(--font-display);
  font-size: clamp(5.5rem, 15vw, 11rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-hard);
  opacity: 0.55;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-claim__title {
  position: relative;
  z-index: 1;
  margin: 18px 0 0;
  font-size: clamp(1.8rem, 4.4vw, 3rem);
  line-height: 1.14;
  max-width: 14em;
}

.page-about .about-claim__para {
  position: relative;
  z-index: 1;
  margin-top: 20px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--bone);
}

.page-about .about-claim__para--muted {
  color: var(--mist);
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-claim__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  background: var(--ink-900);
}

.page-about .about-history__head {
  max-width: 44em;
}

.page-about .about-history__title {
  margin: 16px 0 0;
  font-size: clamp(1.8rem, 4.6vw, 3.1rem);
  line-height: 1.12;
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(34px, 5vw, 60px) 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 46px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), var(--line) 58%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 38px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--neon);
  box-shadow: 0 0 0 4px var(--neon-dim);
}

.page-about .about-timeline__index {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon);
}

.page-about .about-timeline__title {
  margin: 8px 0 0;
  font-size: clamp(1.1rem, 2.1vw, 1.4rem);
  line-height: 1.35;
  color: var(--bone);
}

.page-about .about-timeline__body {
  margin-top: 10px;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-timeline__media {
  position: relative;
  padding-left: 38px;
}

.page-about .about-timeline__figure {
  margin: 0;
  max-width: 100%;
}

.page-about .about-timeline__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  line-height: 1.7;
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  background: linear-gradient(180deg, var(--ink-900), var(--indigo) 130%);
}

.page-about .about-audience__head {
  max-width: 44em;
}

.page-about .about-audience__title {
  margin: 16px 0 0;
  font-size: clamp(1.8rem, 4.6vw, 3.1rem);
  line-height: 1.12;
}

.page-about .about-aud {
  display: grid;
  gap: 16px;
  margin-top: clamp(30px, 4.4vw, 52px);
}

.page-about .about-aud__item {
  background: var(--board);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--line-hard);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
}

.page-about .about-aud__item--neon {
  border-top-color: var(--neon);
}

.page-about .about-aud__item--amber {
  border-top-color: var(--amber);
}

.page-about .about-aud__item--wine {
  border-top-color: var(--wine);
}

.page-about .about-aud__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--bone);
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.page-about .about-aud__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-aud__summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

.page-about .about-aud__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  border: 1px solid var(--line);
  padding: 3px 7px;
  border-radius: var(--radius);
  flex: none;
}

.page-about .about-aud__item--neon .about-aud__tag {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .about-aud__item--amber .about-aud__tag {
  color: var(--amber);
  border-color: var(--amber);
}

.page-about .about-aud__name {
  flex: 1 1 auto;
}

.page-about .about-aud__toggle {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-about .about-aud__toggle::before,
.page-about .about-aud__toggle::after {
  content: "";
  position: absolute;
  background: var(--neon);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-about .about-aud__toggle::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .about-aud__toggle::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .about-aud__item[open] .about-aud__toggle::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-about .about-aud__body {
  padding: 0 18px 20px;
}

.page-about .about-aud__body p {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-aud__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-aud__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--bone);
}

.page-about .about-aud__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 1px;
  background: var(--neon);
}

.page-about .about-aud__item--amber .about-aud__list li::before {
  background: var(--amber);
}

.page-about .about-aud__item--wine .about-aud__list li::before {
  background: var(--wine);
}

/* ---------- 能力与团队 ---------- */
.page-about .about-team {
  background: var(--ink-900);
}

.page-about .about-team__head {
  max-width: 44em;
}

.page-about .about-team__title {
  margin: 16px 0 0;
  font-size: clamp(1.8rem, 4.6vw, 3.1rem);
  line-height: 1.12;
}

.page-about .about-team__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(30px, 4.4vw, 52px);
}

.page-about .about-team__card {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--glass);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--line-hard);
  transform: translateY(-4px);
}

.page-about .about-team__card--a {
  border-left: 3px solid var(--neon);
}

.page-about .about-team__card--b {
  border-left: 3px solid var(--amber);
}

.page-about .about-team__card--c {
  border-left: 3px solid var(--wine);
}

.page-about .about-team__num {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.page-about .about-team__card-title {
  margin: 10px 0 0;
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  color: var(--bone);
}

.page-about .about-team__card-body {
  margin-top: 10px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-team__more {
  margin-top: clamp(24px, 3.4vw, 38px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--board);
}

.page-about .about-team__more-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

.page-about .about-team__more-summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__more-summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--neon);
}

.page-about .about-team__more[open] .about-team__more-summary::before {
  content: "−";
}

.page-about .about-team__more-summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}

.page-about .about-team__more-body {
  padding: 0 18px 20px;
  display: grid;
  gap: 14px;
}

.page-about .about-team__more-body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--indigo), var(--ink-900) 92%);
}

.page-about .about-eco__bg {
  position: absolute;
  top: 8%;
  right: -14%;
  width: 74%;
  margin: 0;
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-eco__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-eco__title {
  margin: 16px 0 0;
  font-size: clamp(1.8rem, 4.6vw, 3.1rem);
  line-height: 1.12;
}

.page-about .about-eco__para {
  margin-top: 18px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-eco__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.page-about .about-eco__tag {
  display: inline-block;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-eco__tag:hover {
  color: var(--bone);
  border-color: var(--line-hard);
}

.page-about .about-eco__tag--neon {
  color: var(--neon);
  border-color: var(--neon);
}

.page-about .about-eco__tag--amber {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: linear-gradient(165deg, var(--ink-800), var(--indigo));
  border-top: 1px solid var(--line-soft);
  padding: clamp(46px, 7vw, 84px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.2;
}

.page-about .about-cta__para {
  margin-top: 14px;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-aud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-aud__item:nth-child(2) {
    margin-top: 28px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team__card--b {
    margin-top: 32px;
  }

  .page-about .about-team__card--c {
    grid-column: span 1;
  }

  .page-about .about-timeline__media {
    padding-left: 38px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-hero__stack {
    margin-top: 24px;
  }

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

  .page-about .about-claim__figure {
    margin-top: 44px;
  }

  .page-about .about-timeline::before {
    left: 7px;
  }

  .page-about .about-timeline__item {
    padding-left: 54px;
    max-width: 62em;
  }

  .page-about .about-timeline__media {
    padding-left: 54px;
    max-width: 62em;
  }

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

  .page-about .about-aud__item:nth-child(3) {
    margin-top: 14px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__card--a {
    margin-top: 0;
  }

  .page-about .about-team__card--b {
    margin-top: 44px;
  }

  .page-about .about-team__card--c {
    margin-top: 20px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-team__card,
  .page-about .about-aud__toggle::before,
  .page-about .about-aud__toggle::after {
    transition: none;
  }

  .page-about .about-stat:hover,
  .page-about .about-team__card:hover {
    transform: none;
  }
}