.page-about {
  --about-rail: 236px;
  --about-gap: clamp(28px, 4vw, 56px);
  --tl-pad: 22px;
}

.page-about .about-top {
  position: relative;
  overflow: hidden;
  border-bottom: var(--bw) solid var(--line);
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 78px,
      rgba(245, 197, 66, .045) 78px 79px
    ),
    var(--ink);
}

.page-about .about-top::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: 62%;
  height: 165%;
  background: linear-gradient(150deg, rgba(245, 197, 66, .14), rgba(122, 75, 255, .10) 52%, transparent 74%);
  border-left: var(--bw) solid var(--gold-deep);
  transform: skewX(-13deg);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: clamp(20px, 4vw, 34px) 0 clamp(30px, 5vw, 62px);
}

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

.page-about .about-hero__text .eyebrow {
  margin-bottom: 12px;
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__facts .data-mono {
  font-size: 17px;
  color: var(--gold);
  font-weight: 500;
}

.page-about .about-hero__facts em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-hero__mark {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.page-about .about-hero__digit {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(64px, 17vw, 132px);
  line-height: .86;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--gold);
  text-stroke: 1.5px var(--gold);
}

.page-about .about-hero__digit-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-deep);
  border-bottom: 1px dashed var(--gold-deep);
  padding-bottom: 4px;
}

.page-about .about-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: clamp(30px, 5vw, 58px) 0 clamp(48px, 7vw, 96px);
}

.page-about .about-anchor {
  border-top: var(--bw) solid var(--line);
  border-bottom: var(--bw) solid var(--line);
  padding: 14px 0;
}

.page-about .about-anchor .anchor-nav__title {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-about .about-anchor .anchor-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-anchor .anchor-nav__link {
  display: block;
  white-space: nowrap;
  padding: 7px 12px;
  font-family: var(--font-body);
  font-size: 13px;
  text-decoration: none;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  transition: color var(--t-press) ease, border-color var(--t-press) ease, background-color var(--t-press) ease;
}

.page-about .about-anchor .anchor-nav__link:hover,
.page-about .about-anchor .anchor-nav__link:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold-deep);
  outline: none;
}

.page-about .about-anchor .anchor-nav__link[aria-current="true"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-sec {
  padding-bottom: clamp(44px, 6vw, 82px);
}

.page-about .about-sec + .about-sec {
  border-top: 1px dashed var(--line);
  padding-top: clamp(34px, 5vw, 64px);
}

.page-about .about-sec .section__title {
  max-width: 20ch;
}

.page-about .about-sec .section__lead {
  max-width: 62ch;
  margin-top: 12px;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 216, 232, .55);
  padding-bottom: 1px;
  transition: color var(--t-press) ease, border-color var(--t-press) ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
  outline: none;
}

/* ---------- 沿革 ---------- */

.page-about .about-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .timeline {
  position: relative;
  margin-top: clamp(26px, 4vw, 46px);
  padding-left: var(--tl-pad);
  border-left: var(--bw) solid var(--gold-deep);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-bottom: clamp(26px, 4vw, 52px);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: calc(-1 * var(--tl-pad) - 9px);
  width: 15px;
  height: 15px;
  background: var(--gold);
  box-shadow: 0 0 0 var(--bw) var(--ink);
}

.page-about .tl-item:last-child::before {
  background: var(--violet);
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(52px, 13vw, 96px);
  line-height: .86;
  letter-spacing: -0.04em;
  color: var(--gold);
}

.page-about .tl-item:last-child .tl-year {
  color: var(--gold-hi);
}

.page-about .tl-body {
  min-width: 0;
}

.page-about .tl-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .tl-sum {
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 58ch;
}

.page-about .ver-badge {
  position: relative;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 3px 9px;
  color: var(--gold);
  border: 1px dashed var(--gold-deep);
  background: var(--panel-2);
}

.page-about .ver-badge__tip {
  position: absolute;
  left: 0;
  bottom: calc(100% + 7px);
  z-index: 4;
  white-space: nowrap;
  padding: 4px 8px;
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--paper);
  background: var(--panel);
  border: 1px dashed var(--gold-deep);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-press) ease;
  pointer-events: none;
}

.page-about .ver-badge:hover .ver-badge__tip,
.page-about .ver-badge:focus-within .ver-badge__tip {
  opacity: 1;
  visibility: visible;
}

.page-about .tl-body .accordion {
  border-left: 1px dashed var(--line);
  padding-left: 14px;
}

/* ---------- 分类与标签 ---------- */

.page-about .cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .cat-card {
  position: relative;
  padding: 18px 16px 20px clamp(54px, 14vw, 66px);
  background: var(--panel);
  border: var(--bw) solid var(--line);
  transition: border-color var(--t-press) ease, transform var(--t-press) ease, box-shadow var(--t-press) ease;
}

.page-about .cat-card:hover {
  border-color: var(--gold-deep);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.page-about .cat-ico {
  position: absolute;
  left: 16px;
  top: 18px;
  width: 26px;
  height: 26px;
  display: block;
  color: var(--gold);
}

.page-about .cat-ico svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .cat-name {
  margin: 0 0 7px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--gold-hi);
}

.page-about .cat-desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .tag-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(26px, 4vw, 44px);
  border-top: var(--bw) solid var(--line);
}

.page-about .tag-note {
  padding: 20px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .tag-note__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
}

.page-about .tag-note__name {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-about .tag-note__text {
  margin: 0;
  max-width: 68ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 核验流程 ---------- */

.page-about .verify-wrap {
  position: relative;
  margin-top: clamp(24px, 3.5vw, 40px);
  padding: clamp(16px, 2.5vw, 26px);
  border: var(--bw) solid var(--line);
  background: var(--panel-2);
}

.page-about .verify-bg {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  opacity: .22;
  pointer-events: none;
}

.page-about .verify-bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(.35);
}

.page-about .flow {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.page-about .flow__node {
  display: block;
  padding: 14px 14px 16px;
  text-decoration: none;
  background: var(--panel);
  border: var(--bw) solid var(--line);
  transition: border-color var(--t-press) ease, opacity var(--t-press) ease, transform var(--t-press) ease;
}

.page-about .flow__node:hover,
.page-about .flow__node:focus-visible {
  border-color: var(--gold-deep);
  outline: none;
}

.page-about .flow__num {
  display: block;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-about .flow__name {
  display: block;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.3;
  color: var(--paper);
  margin-bottom: 8px;
}

.page-about .flow__meta {
  display: block;
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .flow__arrow {
  position: absolute;
  left: 26px;
  bottom: -16px;
  width: 12px;
  height: 12px;
  color: var(--gold-deep);
  transform: rotate(90deg);
}

.page-about .flow:has(.flow__node:target) .flow__node {
  opacity: .6;
}

.page-about .flow:has(.flow__node:target) .flow__node:target {
  opacity: 1;
  border-color: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-gold);
}

.page-about .verify-notes {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 12px;
}

.page-about .verify-notes p {
  margin: 0;
  max-width: 68ch;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  padding-left: 16px;
  border-left: 1px dashed var(--gold-deep);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .team-list {
  display: grid;
  gap: 22px;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 14px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line);
}

.page-about .team-row__name {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-about .team-row__num {
  font-size: 20px;
  font-weight: 500;
  color: var(--gold);
}

.page-about .team-row__bar {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .team-row__bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold));
}

.page-about .team-row:nth-child(1) .team-row__bar i { width: 37.5%; }
.page-about .team-row:nth-child(2) .team-row__bar i { width: 25%; }
.page-about .team-row:nth-child(3) .team-row__bar i { width: 20.8%; }
.page-about .team-row:nth-child(4) .team-row__bar i { width: 16.7%; }

.page-about .team-row__desc {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .team-fig {
  margin: 0;
}

/* ---------- 更新节奏 ---------- */

.page-about .about-status {
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .about-status__head-title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
}

.page-about .about-status__head-code {
  font-size: 12px;
  color: var(--violet);
}

.page-about .about-status .status-panel__row {
  gap: 12px;
}

.page-about .about-status .status-panel__value {
  font-size: 13.5px;
  color: var(--gold-hi);
}

.page-about .about-cadence-note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 68ch;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
  padding-left: 18px;
  border-left: var(--bw) solid var(--gold-deep);
}

/* ---------- 自助与人工 ---------- */

.page-about .bounds {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: clamp(24px, 3.5vw, 38px);
}

.page-about .bound {
  padding: 20px 18px 22px;
  background: var(--panel);
  border: var(--bw) solid var(--line);
}

.page-about .bound--human {
  background: var(--panel-2);
  border-color: var(--panel);
}

.page-about .bound__tag {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-about .bound__title {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .bound .index-list {
  margin: 0;
}

.page-about .bound__note {
  margin: 16px 0 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 结尾 ---------- */

.page-about .about-next {
  margin-top: clamp(10px, 2vw, 20px);
  padding: clamp(22px, 3.5vw, 34px);
  background: linear-gradient(120deg, rgba(245, 197, 66, .10), rgba(122, 75, 255, .10));
  border: var(--bw) solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-next__text {
  margin: 0 0 18px;
  max-width: 58ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about {
    --tl-pad: 36px;
  }

  .page-about .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 22px;
  }

  .page-about .tag-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-about .tag-note {
    border-bottom: 0;
    border-right: 1px dashed var(--line);
    padding-right: 24px;
  }

  .page-about .tag-note:last-child {
    border-right: 0;
    padding-right: 0;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: clamp(30px, 4vw, 60px);
  }

  .page-about .about-hero__mark {
    align-items: flex-end;
    text-align: right;
    padding-bottom: 6px;
  }

  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .flow__arrow {
    left: auto;
    right: -19px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 340px);
    align-items: start;
  }

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

@media (min-width: 980px) {
  .page-about .about-wrap {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-anchor {
    position: sticky;
    top: 20px;
    align-self: start;
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-anchor .anchor-nav__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-anchor .anchor-nav__list li + li {
    margin-top: 6px;
  }

  .page-about .about-anchor .anchor-nav__link {
    border-left: 3px solid transparent;
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    background: transparent;
    padding: 6px 10px 6px 12px;
  }

  .page-about .about-anchor .anchor-nav__link[aria-current="true"] {
    color: var(--gold-hi);
    background: rgba(122, 75, 255, .16);
    border-left-color: var(--violet);
  }

  .page-about .about-sec .section__title {
    max-width: 16ch;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }

  .page-about .cat-card:hover,
  .page-about .flow:has(.flow__node:target) .flow__node:target {
    transform: none;
  }
}