.page-about {
  --about-rule: rgba(0, 229, 255, .2);
  --about-rule-soft: rgba(215, 222, 230, .14);
  --about-panel: rgba(14, 59, 59, .4);
  --about-panel-deep: rgba(11, 27, 43, .78);
  display: block;
  background:
    radial-gradient(1100px 560px at 84% -8%, rgba(36, 30, 78, .55), transparent 62%),
    radial-gradient(880px 500px at 4% 18%, rgba(14, 59, 59, .42), transparent 60%),
    var(--ink);
  color: var(--mist);
}

.page-about .shell {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(36px, 5.5vw, 72px) 0 clamp(30px, 4.5vw, 56px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 80px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: var(--body_line_height, 1.75);
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  background: var(--about-rule);
  overflow: hidden;
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  background: var(--about-panel-deep);
}

.page-about .about-stat dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-about .about-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.1;
  color: var(--cyan);
}

/* ---------- 页内章节跳转 ---------- */
.page-about .about-jump {
  padding-bottom: clamp(30px, 4vw, 52px);
}

.page-about .about-jump .tag-row {
  padding-inline: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: clamp(64px, 8vw, 120px) 0;
}

.page-about .about-chapter--teal {
  background: linear-gradient(180deg, rgba(14, 59, 59, .55), rgba(11, 27, 43, .9));
}

.page-about .about-chapter--indigo {
  background: linear-gradient(180deg, rgba(36, 30, 78, .55), rgba(11, 27, 43, .92));
}

.page-about .about-chapter--wine {
  background: linear-gradient(180deg, rgba(74, 30, 43, .5), rgba(11, 27, 43, .94));
}

.page-about .about-chapter--loose {
  padding-block: clamp(76px, 9vw, 140px);
}

.page-about .about-chapter .section-title {
  margin: 6px 0 14px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 46px);
  line-height: 1.16;
  color: var(--white);
  max-width: 22ch;
}

.page-about .about-chapter .section-lede {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: clamp(16px, 1.5vw, 17px);
  line-height: var(--body_line_height, 1.75);
  color: var(--mist);
}

.page-about .about-chapter p {
  max-width: 68ch;
  line-height: var(--body_line_height, 1.75);
}

/* ---------- 品牌缘起 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
}

.page-about .about-split__main p + p {
  margin-top: 14px;
}

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

.page-about .about-principle {
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  background: var(--about-panel);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-principle:hover,
.page-about .about-principle:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-about .about-principle__no {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-about .about-principle .card-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-principle .card-text {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history__figure {
  margin: 0 0 clamp(28px, 4vw, 48px);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--about-panel-deep);
}

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

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 2.8vw, 32px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 20px;
  bottom: 20px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(255, 107, 53, .55) 58%, rgba(0, 229, 255, .05));
  opacity: .55;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 18px;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border: 1px solid var(--about-rule);
  border-radius: var(--pill);
  background: var(--ink);
}

.page-about .about-timeline__node::after {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: var(--pill);
  background: var(--grey);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__node::after,
.page-about .about-timeline__item:focus-within .about-timeline__node::after {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(0, 229, 255, .14);
}

.page-about .about-timeline__card {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(14, 59, 59, .42), rgba(11, 27, 43, .55));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__card,
.page-about .about-timeline__item:focus-within .about-timeline__card {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-about .about-timeline__card .card-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-timeline__card .card-text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--grey);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: 8px;
}

.page-about .about-team__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  background: var(--about-rule);
  overflow: hidden;
}

.page-about .about-figure {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--about-panel-deep);
}

.page-about .about-figure__num {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-figure__unit {
  margin-left: 2px;
  font-size: .5em;
  color: var(--grey);
}

.page-about .about-figure__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-team__body p + p {
  margin-top: 14px;
}

.page-about .about-team__link {
  margin-top: 22px;
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  display: grid;
  gap: clamp(28px, 3.6vw, 48px);
}

.page-about .about-cred__figure {
  margin: 24px 0 0;
  max-width: 420px;
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--about-panel-deep);
}

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

.page-about .about-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-badge {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--r-lg);
  background: rgba(36, 30, 78, .34);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan);
  background: rgba(36, 30, 78, .5);
}

.page-about .about-badge__icon {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  color: var(--cyan);
}

.page-about .about-badge__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-badge__text {
  margin: 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: 10px;
}

.page-about .about-eco__figure {
  margin: 0;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--about-panel-deep);
}

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

.page-about .about-eco__list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-eco__node {
  padding: 18px 20px;
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--r-lg);
  background: rgba(14, 59, 59, .34);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-eco__node:hover,
.page-about .about-eco__node:focus-within {
  transform: translateY(-3px);
  border-color: var(--signal);
}

.page-about .about-eco__node .card-title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-eco__node .card-text {
  margin: 0;
  max-width: none;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .about-eco__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 22px;
}

.page-about .about-inline-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .4);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-about .about-inline-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 协作方式 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.page-about .about-step {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--about-rule-soft);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(74, 30, 43, .42), rgba(11, 27, 43, .6));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-step:hover,
.page-about .about-step:focus-within {
  transform: translateY(-3px);
  border-color: var(--signal);
}

.page-about .about-step__no {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-about .about-step__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-step__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--grey);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(56px, 7vw, 96px) 0 clamp(72px, 8vw, 120px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
  align-items: center;
}

.page-about .about-cta__text .section-title {
  margin: 0 0 10px;
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

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

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

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cred {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-cred__figure {
    max-width: 100%;
  }

  .page-about .about-timeline__item:nth-child(even) {
    padding-left: 64px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}

.page-about {
  --body_line_height: 1.6;
}