.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
}

.page-about p {
  margin: 0 0 14px;
}

.page-about a {
  color: inherit;
  text-decoration: none;
}

.page-about ul,
.page-about ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crumbs {
  padding-top: 18px;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
}

.page-about .about-crumbs a {
  color: var(--yellow);
  border-bottom: 1px solid transparent;
}

.page-about .about-crumbs a:hover {
  border-bottom-color: var(--yellow);
}

/* ---------- 封面 ---------- */

.page-about .about-cover {
  position: relative;
  padding: clamp(26px, 5vw, 60px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 3px solid var(--red);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(226, 58, 46, .22), transparent 62%),
    radial-gradient(90% 80% at 0% 100%, rgba(15, 59, 54, .9), transparent 68%),
    var(--ink);
}

.page-about .about-cover__inner {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-cover__eyebrow {
  color: var(--yellow);
  letter-spacing: .2em;
}

.page-about .about-cover__title {
  font-family: var(--font-display);
  font-size: clamp(34px, 7.4vw, 76px);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: -.01em;
  max-width: 15em;
}

.page-about .about-cover__lede {
  max-width: 40em;
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.85;
  color: rgba(244, 241, 234, .84);
  margin: 0;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
  margin-top: 6px;
}

.page-about .about-figures__item {
  padding-left: 12px;
  border-left: 3px solid var(--yellow);
}

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  padding: clamp(42px, 7vw, 92px) 0;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 44px);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -.005em;
  margin-bottom: 16px;
  max-width: 20em;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--yellow);
  margin: 0 0 12px;
}

.page-about .about-kicker__no {
  display: inline-block;
  padding: 2px 8px;
  background: var(--red);
  color: var(--ink);
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .about-lead {
  max-width: 42em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 241, 234, .82);
}

.page-about .about-lead--tight {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-block p {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 241, 234, .82);
  max-width: 42em;
}

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

.page-about .about-inline-link {
  margin-top: 18px;
  font-size: 15px;
  color: var(--gray);
}

.page-about .about-inline-link a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(0, 229, 195, .45);
  padding-bottom: 1px;
}

.page-about .about-inline-link a:hover {
  border-bottom-color: var(--cyan);
}

.page-about .about-band {
  height: 10px;
}

/* ---------- 图片容器 ---------- */

.page-about .about-media {
  position: relative;
  margin: 0;
  border: 3px solid var(--ink-2);
  box-shadow: var(--shadow-card-lg);
  background: var(--panel-soft);
}

.page-about .about-media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.7) contrast(1.12);
}

.page-about .about-media--band .about-media__img {
  aspect-ratio: 14 / 9;
}

.page-about .about-media--portrait .about-media__img {
  aspect-ratio: 3 / 4;
}

.page-about .about-media__cap {
  display: block;
  padding: 8px 12px;
  background: var(--red);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .02em;
}

/* ---------- 01 起点 ---------- */

.page-about .about-start__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
}

/* ---------- 02 熟客路径 ---------- */

.page-about .about-moves {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-move {
  background: var(--ink-2);
  border: 2px solid var(--panel);
  border-left: 6px solid var(--yellow);
  padding: 18px 18px 6px;
  box-shadow: var(--shadow-card);
  transition: transform .18s ease, box-shadow .18s ease;
}

.page-about .about-move:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 var(--red);
}

.page-about .about-move__title {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--paper);
  margin-bottom: 8px;
}

.page-about .about-move__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .78);
  margin-bottom: 12px;
}

/* ---------- 03 数据与内容 ---------- */

.page-about .about-produce__media {
  margin: clamp(22px, 3vw, 32px) 0 clamp(26px, 4vw, 40px);
}

.page-about .about-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 2px solid var(--line);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 2px solid var(--line);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  color: var(--red);
}

.page-about .about-step__title {
  font-family: var(--font-display);
  font-size: 20px;
  margin-bottom: 6px;
  color: var(--paper);
}

.page-about .about-step__body p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .78);
  margin: 0;
}

/* ---------- 04 团队 ---------- */

.page-about .about-team {
  background: var(--ink-2);
}

.page-about .about-roles {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  background: var(--ink);
  border: 2px solid var(--panel);
  box-shadow: var(--shadow-card);
}

.page-about .about-role__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--paper);
}

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

.page-about .about-role__sum:hover {
  background: var(--panel-soft);
}

.page-about .about-role__no {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--yellow);
}

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

.page-about .about-role__sum::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--red);
}

.page-about .about-role[open] .about-role__sum::after {
  content: "−";
}

.page-about .about-role__text {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .78);
}

/* ---------- 05 发展历程 ---------- */

.page-about .about-tl__intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
  margin-bottom: clamp(28px, 5vw, 48px);
}

.page-about .about-tl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-tl__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tl__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  padding: 6px 12px;
  border: 2px solid var(--panel);
  color: var(--gray);
  background: var(--ink-2);
}

.page-about .about-tl__link:hover,
.page-about .about-tl__link:focus-visible {
  color: var(--ink);
  background: var(--yellow);
  border-color: var(--yellow);
  outline: none;
}

.page-about .about-tl__cards {
  display: grid;
  gap: 16px;
}

.page-about .about-year {
  position: relative;
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink-2);
  border: 2px solid var(--panel);
  border-left: 8px solid var(--wine);
  box-shadow: var(--shadow-card);
  scroll-margin-top: 90px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.page-about .about-year:nth-child(even) {
  border-left-color: var(--teal);
}

.page-about .about-year:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 var(--red);
}

.page-about .about-year:target {
  border-color: var(--yellow);
  border-left-color: var(--yellow);
}

.page-about .about-year__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1;
  color: var(--paper);
  letter-spacing: -.02em;
  margin-bottom: 12px;
}

.page-about .about-year__title {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--yellow);
  margin-bottom: 8px;
}

.page-about .about-year__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .78);
  margin: 0;
  max-width: 40em;
}

/* ---------- 06 合作生态 ---------- */

.page-about .about-eco {
  background:
    linear-gradient(180deg, rgba(90, 21, 18, .28), transparent 40%),
    var(--ink);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 28px) 0 clamp(24px, 4vw, 34px);
}

.page-about .about-eco__stat {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: center;
  padding: clamp(18px, 3vw, 26px);
  border: 3px solid var(--cyan);
  background: var(--panel-soft);
}

.page-about .about-eco__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(48px, 12vw, 104px);
  line-height: .9;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-eco__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .82);
  margin: 0;
  max-width: 34em;
}

/* ---------- 07 联系 ---------- */

.page-about .about-contact {
  border-top: 3px solid var(--yellow);
}

.page-about .about-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-contact__card {
  padding: clamp(18px, 3vw, 26px);
  background: var(--ink-2);
  border: 2px solid var(--panel);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.page-about .about-contact__card--alt {
  border-color: var(--yellow);
}

.page-about .about-contact__card--plain {
  border-color: var(--panel);
  background: var(--panel-soft);
}

.page-about .about-contact__title {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--paper);
  margin-bottom: 10px;
}

.page-about .about-contact__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .78);
  margin-bottom: 18px;
}

.page-about .about-contact__btn {
  align-self: flex-start;
  margin-top: auto;
}

.page-about .about-contact__list {
  display: grid;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .about-contact__list li {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gray);
}

.page-about .about-contact__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray);
  margin: 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-contact__card--plain {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-start__grid {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
  }

  .page-about .about-moves {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-step {
    grid-template-columns: 70px 1fr;
    gap: 22px;
    padding: 24px 0;
  }

  .page-about .about-tl__intro {
    grid-template-columns: 5fr 7fr;
    align-items: end;
  }

  .page-about .about-tl {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-tl__rail {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    position: sticky;
    top: calc(var(--bar) + 24px);
    padding-bottom: 0;
    border-right: 2px solid var(--line);
    padding-right: 10px;
  }

  .page-about .about-tl__link {
    border: 0;
    border-left: 3px solid transparent;
    background: transparent;
    font-size: 18px;
    padding: 4px 8px;
    text-align: left;
  }

  .page-about .about-tl__link:hover,
  .page-about .about-tl__link:focus-visible {
    background: transparent;
    color: var(--yellow);
    border-left-color: var(--red);
    border-color: transparent;
    border-left-color: var(--red);
  }

  .page-about .about-year {
    padding: clamp(22px, 3vw, 32px) clamp(24px, 3.4vw, 40px);
  }

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

  .page-about .about-contact__card--plain {
    grid-column: auto;
  }

  .page-about .about-eco__stat {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(20px, 3vw, 36px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-move,
  .page-about .about-year {
    transition: none;
  }

  .page-about .about-move:hover,
  .page-about .about-year:hover {
    transform: none;
  }
}