.page-about {
  position: relative;
  overflow-x: clip;
  background-color: var(--bg-deep);
  color: var(--text);
  font-family: var(--font-body);
}

.page-about::before {
  content: "";
  position: absolute;
  top: -80px;
  left: 34%;
  width: min(880px, 130vw);
  height: 480px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(53, 232, 208, .13), rgba(53, 232, 208, 0) 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about > * {
  position: relative;
  z-index: 1;
}

/* ===== 面包屑 ===== */
.page-about .about-crumb {
  padding-top: calc(var(--header-space) + 10px);
  padding-bottom: 4px;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 16px;
  padding-bottom: 48px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.6vw, 78px);
  line-height: 1.04;
  letter-spacing: .02em;
  margin: 14px 0 0;
  color: var(--text);
}

.page-about .about-hero__hl {
  color: var(--cyan);
  text-shadow: 0 0 28px rgba(53, 232, 208, .32);
}

.page-about .about-hero .lede {
  margin-top: 22px;
  max-width: 54ch;
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-about .about-hero__frame {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 18px -10px -18px 10px;
  border: 1px solid var(--line);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-hero__facts li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-about .about-hero__facts li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .58em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ===== 01 分栏 ===== */
.page-about .about-split {
  align-items: start;
  margin-top: 8px;
}

.page-about .about-points {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-point {
  position: relative;
  padding: 18px 20px 18px 24px;
  background: var(--bg-glass);
  border: 1px solid var(--line);
  clip-path: polygon(0 var(--cut), var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-point::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--cyan);
}

.page-about .about-point__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-point__desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ===== 02 非托管声明 ===== */
.page-about .about-pledge {
  margin-top: 8px;
  padding: 28px 24px;
}

.page-about .about-pledge__lead {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-pledge__sub {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-pledge__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-pledge__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

/* ===== 03 私钥本地 ===== */
.page-about .about-keys {
  align-items: start;
  margin-top: 8px;
}

.page-about .about-keys__media {
  display: grid;
  gap: 12px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-flow__item {
  padding: 18px 20px;
  background: linear-gradient(100deg, rgba(53, 232, 208, .07), rgba(53, 232, 208, 0) 62%), var(--bg-panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
}

.page-about .about-flow__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding: 3px 8px;
  border: 1px solid rgba(53, 232, 208, .35);
}

.page-about .about-flow__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ===== 04 团队 ===== */
.page-about .about-team__intro {
  margin: 4px 0 20px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-team__duty {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-team__meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--violet);
}

/* ===== 05 版本时间轴 ===== */
.page-about .about-timeline {
  margin-top: 8px;
}

.page-about .about-timeline__fig {
  margin-top: 28px;
}

.page-about .about-timeline__foot {
  margin: 20px 0 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-timeline__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 232, 208, .4);
}

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

/* ===== 06 边界 ===== */
.page-about .about-limits {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 8px;
}

.page-about .about-limit {
  position: relative;
  padding: 22px 20px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  clip-path: polygon(0 var(--cut), var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-limit__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-limit__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-limit p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ===== 07 联系 ===== */
.page-about .about-reach {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 8px;
}

.page-about .about-reach__card {
  padding: 26px 22px;
  background: linear-gradient(180deg, rgba(19, 28, 44, .92), rgba(11, 17, 29, .92));
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .about-reach__dl {
  margin: 16px 0 0;
  display: grid;
  gap: 16px;
}

.page-about .about-reach__dl dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--text-dim);
}

.page-about .about-reach__dl dd {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-reach__hours {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-reach__card .btn {
  margin-top: 20px;
}

.page-about .about-reach__side {
  padding: 22px 4px;
  border-left: 1px solid var(--line);
  padding-left: 20px;
}

.page-about .about-reach__side p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .about-reach__side p:last-child {
  margin-bottom: 0;
}

.page-about .about-reach__side a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 232, 208, .4);
}

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

/* ===== 图片与通用 ===== */
.page-about .media__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media__caption {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ===== 响应式 ===== */
@media (min-width: 720px) {
  .page-about .about-team__row {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    gap: 8px 24px;
    align-items: baseline;
  }

  .page-about .about-team__idx {
    grid-row: 1 / span 2;
  }

  .page-about .about-team__name {
    grid-column: 2;
  }

  .page-about .about-team__duty {
    grid-column: 2;
  }

  .page-about .about-team__meta {
    grid-column: 3;
    grid-row: 1;
    text-align: right;
  }
}

@media (min-width: 700px) {
  .page-about .about-limits {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 56px;
    align-items: center;
    padding-top: 28px;
    padding-bottom: 76px;
  }

  .page-about .about-crumb {
    padding-bottom: 0;
  }

  .page-about .about-pledge {
    padding: 40px 36px;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-limits {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    max-width: 940px;
  }
}

@media (max-width: 599px) {
  .page-about .about-hero__visual::after {
    display: none;
  }

  .page-about .about-reach__side {
    padding-left: 16px;
  }

  .page-about .about-flow__item {
    padding: 16px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    transform: none !important;
    opacity: 1 !important;
    transition: none !important;
  }
}