.page-about {
  position: relative;
  overflow-x: clip;
  --about-pad: 28px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: var(--sp-4) 0 var(--sp-5);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -14%;
  width: 64%;
  height: 128%;
  z-index: -1;
  pointer-events: none;
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, rgba(198, 255, 61, 0.16), rgba(47, 107, 255, 0.12) 52%, transparent 80%);
  transform: skewY(-9deg);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--sp-3);
  align-items: center;
}

.page-about .about-hero__title {
  margin: var(--sp-2) 0 var(--sp-2);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-2);
  margin-top: var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--c-line);
}

.page-about .about-hero__stats .stat__value {
  font-size: 26px;
  line-height: 1.15;
}

.page-about .about-hero__stats .stat:last-child {
  grid-column: 1 / -1;
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: linear-gradient(160deg, var(--c-panel), var(--c-void));
  clip-path: polygon(0 4%, 100% 0, 100% 100%, 0 96%);
}

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

/* ---------- 章节抬头 ---------- */
.page-about .about-block {
  padding: var(--sp-5) 0;
}

.page-about .about-head {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

.page-about .about-head__no {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  color: var(--c-neon);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-about .about-head__title {
  margin: 0;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-head__sub {
  margin: 6px 0 0;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-left: var(--about-pad);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-neon) 0%, var(--c-blue) 46%, var(--c-line) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: var(--sp-3);
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__marker {
  position: absolute;
  left: calc(-1 * var(--about-pad));
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-void);
  border: 2px solid var(--c-line);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-tl__item[data-open] .about-tl__marker {
  border-color: var(--c-neon);
  background: var(--c-neon);
  box-shadow: 0 0 0 5px rgba(198, 255, 61, 0.16);
}

.page-about .about-tl__when {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-neon);
  text-transform: uppercase;
}

.page-about .about-tl__title {
  margin: 6px 0 0;
  font-size: 18px;
  line-height: 1.45;
  font-weight: 700;
}

.page-about .about-tl__trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 7px 13px;
  font: inherit;
  font-size: 13px;
  color: var(--c-mist);
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .about-tl__trigger:hover,
.page-about .about-tl__trigger:focus-visible {
  color: var(--c-neon);
  border-color: var(--c-neon);
}

.page-about .about-tl__chev {
  display: inline-block;
  font-size: 13px;
  line-height: 1;
  transition: transform 0.28s var(--ease);
}

.page-about .about-tl__item[data-open] .about-tl__chev {
  transform: rotate(135deg);
  color: var(--c-neon);
}

.page-about .about-tl__panel {
  margin-top: 12px;
  padding: 14px 18px;
  border-left: 3px solid var(--c-neon);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--c-panel);
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-tl__panel p {
  margin: 0;
}

.page-about .about-tl-media {
  margin: var(--sp-4) 0 0;
}

.page-about .about-tl-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-line);
}

.page-about .about-tl-media .media__caption {
  margin-top: 10px;
  color: var(--c-mist);
  font-size: 13px;
}

/* ---------- 四类服务 ---------- */
.page-about .about-serv {
  display: grid;
  gap: var(--sp-2);
}

.page-about .about-serv__card {
  position: relative;
  padding: var(--sp-3) var(--sp-2) var(--sp-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: var(--c-panel);
  overflow: hidden;
}

.page-about .about-serv__card::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 255, 61, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .about-serv__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-blue-soft);
}

.page-about .about-serv__title {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-serv__text {
  margin: 0;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-serv__who {
  margin: var(--sp-2) 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-white);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: var(--sp-3);
  align-items: start;
}

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

.page-about .about-team__roles li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-about .about-team__role {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-neon);
}

.page-about .about-team__duty {
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-team__note {
  margin: var(--sp-2) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-blue);
  color: var(--c-mist);
  font-size: 13px;
  line-height: 1.75;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: linear-gradient(150deg, var(--c-panel), var(--c-void));
}

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

/* ---------- 合作生态 ---------- */
.page-about .about-eco__ring {
  display: grid;
  gap: 10px;
  margin-bottom: var(--sp-3);
}

.page-about .about-eco__core {
  display: none;
}

.page-about .about-eco__node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  background: var(--c-panel);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

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

.page-about .about-eco__num {
  flex: none;
  min-width: 46px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-neon);
}

.page-about .about-eco__name {
  font-size: 14px;
  color: var(--c-white);
  line-height: 1.4;
}

.page-about .about-eco__notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .about-eco__notes li {
  position: relative;
  padding-left: 18px;
  color: var(--c-mist);
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-eco__notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-neon);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-pledge {
  padding: var(--sp-4) 0 var(--sp-6);
}

.page-about .about-pledge__panel {
  position: relative;
  overflow: hidden;
  padding: var(--sp-4) var(--sp-3);
  border: 1px solid var(--c-line);
  border-radius: var(--r-xl);
  background: linear-gradient(140deg, var(--c-panel) 0%, var(--c-void) 78%);
}

.page-about .about-pledge__slash {
  position: absolute;
  top: -30%;
  right: -18%;
  width: 52%;
  height: 170%;
  transform: skewY(-11deg);
  background: linear-gradient(160deg, rgba(198, 255, 61, 0.2), rgba(47, 107, 255, 0.14) 60%, transparent 88%);
  pointer-events: none;
}

.page-about .about-pledge__title {
  position: relative;
  margin: var(--sp-2) 0 var(--sp-2);
}

.page-about .about-pledge__text {
  position: relative;
  max-width: 40ch;
  margin: 0;
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-pledge__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-3);
}

.page-about .about-pledge__more {
  position: relative;
  margin: var(--sp-2) 0 0;
  font-size: 14px;
  color: var(--c-mist);
}

.page-about .about-pledge__more a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  padding-bottom: 2px;
}

.page-about .about-pledge__more a:hover {
  color: var(--c-white);
  border-bottom-color: var(--c-white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding-top: var(--sp-5);
  }

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

  .page-about .about-hero__stats .stat:last-child {
    grid-column: auto;
  }

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

  .page-about .about-serv {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-3);
  }

  .page-about .about-head__title {
    font-size: 30px;
  }

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

  .page-about .about-pledge__panel {
    padding: var(--sp-5) var(--sp-4);
  }
}

@media (min-width: 1024px) {
  .page-about {
    --about-pad: 40px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.02fr 0.98fr;
    gap: var(--sp-5);
  }

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

  .page-about .about-serv {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--sp-4);
  }

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

  .page-about .about-eco {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--sp-5);
    align-items: center;
  }

  .page-about .about-eco__ring {
    position: relative;
    display: block;
    width: 100%;
    max-width: 560px;
    aspect-ratio: 1 / 1;
    margin: 0 auto var(--sp-3);
    border: 1px dashed var(--c-line);
    border-radius: 50%;
  }

  .page-about .about-eco__ring::before {
    content: "";
    position: absolute;
    inset: 22%;
    border: 1px dashed var(--c-line);
    border-radius: 50%;
  }

  .page-about .about-eco__core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: inline-block;
    padding: 10px 18px;
    border-radius: var(--r-pill);
    background: var(--c-void);
    border: 1px solid var(--c-neon);
    color: var(--c-neon);
    font-size: 13px;
    letter-spacing: 0.12em;
  }

  .page-about .about-eco__node {
    position: absolute;
    width: 172px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 16px;
    border-radius: var(--r-md);
    transform: translate(-50%, -50%);
  }

  .page-about .about-eco__node:hover {
    transform: translate(-50%, -50%) scale(1.04);
  }

  .page-about .about-eco__node--n {
    top: 13%;
    left: 50%;
  }

  .page-about .about-eco__node--e {
    top: 50%;
    left: 87%;
  }

  .page-about .about-eco__node--s {
    top: 87%;
    left: 50%;
  }

  .page-about .about-eco__node--w {
    top: 50%;
    left: 13%;
  }

  .page-about .about-eco__num {
    min-width: 0;
    font-size: 18px;
  }

  .page-about .about-eco__name {
    font-size: 13px;
  }

  .page-about .about-eco__ring {
    margin-bottom: 0;
  }

  .page-about .about-eco__notes {
    gap: var(--sp-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__marker,
  .page-about .about-tl__trigger,
  .page-about .about-tl__chev,
  .page-about .about-eco__node {
    transition: none;
  }
}