.page-about {
  --about-rail: 104px;
  --about-hair: rgba(10, 26, 51, 0.16);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-block: clamp(16px, 2.6vw, 28px) clamp(40px, 6vw, 84px);
  background: var(--paper);
  color: var(--deep);
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-shot {
  margin: 0;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--brown);
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

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

.page-about .about-hero-figure .plate {
  margin-top: 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--line);
  text-transform: uppercase;
}

.page-about .about-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--deep);
  text-wrap: balance;
}

.page-about .about-hero-copy .lede {
  margin-top: 18px;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.7;
  color: var(--line);
}

.page-about .about-hero-prose {
  margin-top: 16px;
}

.page-about .about-hero-prose p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--deep);
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.55;
  color: var(--deep);
}

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

.page-about .about-hero-actions .btn--ghost {
  background: transparent;
  color: var(--deep);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--line);
}

.page-about .about-hero-actions .btn--ghost:hover {
  box-shadow: 8px 8px 0 var(--line);
}

/* ============ 速览条 ============ */
.page-about .about-jump {
  margin-top: clamp(30px, 4.6vw, 56px);
  padding-block: 14px;
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
}

.page-about .about-jump-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-jump-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump-list a {
  color: var(--deep);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color var(--dur) ease, color var(--dur) ease;
}

.page-about .about-jump-list a:hover,
.page-about .about-jump-list a:focus-visible {
  color: var(--line);
  border-bottom-color: var(--green);
}

/* ============ 团队 ============ */
.page-about .about-team {
  padding-block: clamp(48px, 7vw, 92px);
  background: var(--deep);
  color: var(--paper-hi);
}

.page-about .about-heading {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 3.1vw, 38px);
  line-height: 1.24;
  color: var(--deep);
  text-wrap: balance;
}

.page-about .about-heading--light {
  color: var(--paper-hi);
}

.page-about .about-team-head .eyebrow {
  color: var(--green);
}

.page-about .about-team-lede {
  max-width: 46ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-team-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-role {
  padding: 22px 20px 20px;
  border: 3px solid var(--line);
  background: rgba(255, 247, 234, 0.04);
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) ease, box-shadow var(--dur) ease,
    border-color var(--dur) ease;
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hard-lg);
  border-color: var(--green);
  outline: none;
}

.page-about .about-role:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 3px;
}

.page-about .about-role-num {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  letter-spacing: -0.01em;
}

.page-about .about-role-num--text {
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-role-name {
  margin: 12px 0 0;
  font-size: 19px;
  color: var(--paper-hi);
}

.page-about .about-role-line {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist);
}

.page-about .about-role-duty {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 280ms ease, opacity 180ms ease, margin-top 200ms ease;
}

.page-about .about-role-duty p {
  margin: 0;
  padding-top: 12px;
  border-top: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-role:hover .about-role-duty,
.page-about .about-role:focus .about-role-duty,
.page-about .about-role:focus-within .about-role-duty {
  max-height: 320px;
  opacity: 1;
  margin-top: 14px;
}

/* ============ 时间线 ============ */
.page-about .about-timeline {
  padding-block: clamp(48px, 7vw, 92px);
  background: var(--paper);
  color: var(--deep);
}

.page-about .about-timeline .eyebrow {
  color: var(--orange);
}

.page-about .about-timeline-lede {
  max-width: 48ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--line);
}

.page-about .about-band {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-hard);
  background: var(--brown);
  overflow: hidden;
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-caption {
  padding: 10px 14px;
  background: var(--paper-hi);
  border-top: 2px solid var(--ink);
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.6;
  color: var(--line);
}

.page-about .about-caption--light {
  background: transparent;
  border-top-color: var(--line);
  color: var(--mist);
}

.page-about .about-years {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 3px solid var(--ink);
}

.page-about .about-year {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0 20px 20px;
  border-bottom: 2px solid var(--about-hair);
  transition: background-color var(--dur) ease, padding-left var(--dur) ease;
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: 50%;
  transition: background-color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-year:hover,
.page-about .about-year:focus-within {
  background: rgba(255, 106, 31, 0.07);
}

.page-about .about-year:hover::before,
.page-about .about-year:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-year-num {
  font-family: var(--font-data);
  font-size: clamp(21px, 2.8vw, 27px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--orange);
  line-height: 1.1;
}

.page-about .about-year-name {
  margin: 0;
  font-size: 18px;
  color: var(--deep);
}

.page-about .about-year-body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--line);
}

/* ============ 流程 ============ */
.page-about .about-flow {
  padding-block: clamp(48px, 7vw, 92px);
  background: var(--ink);
  color: var(--paper);
  border-top: 3px solid var(--line);
}

.page-about .about-flow .eyebrow {
  color: var(--cyan);
}

.page-about .about-flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-flow-lede {
  max-width: 44ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-flow-note {
  max-width: 44ch;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-about .about-step {
  position: relative;
  padding: 20px 20px 20px 22px;
  border: 3px solid var(--line);
  background: rgba(255, 247, 234, 0.035);
  transition: transform var(--dur) ease, border-color var(--dur) ease,
    box-shadow var(--dur) ease;
}

.page-about .about-step::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--green);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) ease;
}

.page-about .about-step:hover,
.page-about .about-step:focus-visible {
  transform: translateY(-4px);
  border-color: var(--green);
  box-shadow: 8px 8px 0 rgba(184, 255, 61, 0.16);
  outline: none;
}

.page-about .about-step:hover::after,
.page-about .about-step:focus-visible::after {
  transform: scaleY(1);
}

.page-about .about-step:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 3px;
}

.page-about .about-step-idx {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-step-name {
  margin: 8px 0 0;
  font-size: 18px;
  color: var(--paper-hi);
}

.page-about .about-step p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-flow-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
  border: 3px solid var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--deep);
}

.page-about .about-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ============ 承诺 ============ */
.page-about .about-promise {
  padding-block: clamp(48px, 7vw, 92px);
  background: var(--paper);
  color: var(--deep);
}

.page-about .about-promise .eyebrow {
  color: var(--orange);
}

.page-about .about-promise-lede {
  max-width: 48ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--line);
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.8vw, 32px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-promise-item {
  border-top: 3px solid var(--ink);
  padding-top: 14px;
  transition: border-color var(--dur) ease;
}

.page-about .about-promise-item:hover {
  border-top-color: var(--orange);
}

.page-about .about-promise-key {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: -0.01em;
  color: var(--deep);
  background: linear-gradient(transparent 62%, var(--green) 62%, var(--green) 92%, transparent 92%);
}

.page-about .about-promise-item p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--line);
}

/* ============ 反馈 ============ */
.page-about .about-feedback {
  padding-block: clamp(48px, 7vw, 92px);
  background: var(--deep);
  color: var(--paper);
  border-top: 3px solid var(--line);
}

.page-about .about-feedback .eyebrow {
  color: var(--green);
}

.page-about .about-feedback-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-feedback-copy p {
  max-width: 46ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper);
}

.page-about .about-feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-btn-light {
  background: transparent;
  color: var(--paper-hi);
  border: 2px solid var(--green);
  box-shadow: 4px 4px 0 var(--ink);
}

.page-about .about-btn-light:hover {
  box-shadow: 8px 8px 0 var(--ink);
}

.page-about .about-feedback-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 3px solid var(--line);
}

.page-about .about-feedback-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 15px 0;
  border-bottom: 2px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-feedback-tag {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

/* ============ 断点 ============ */
@media (min-width: 620px) {
  .page-about .about-promise-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-feedback-list li {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .about-team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-role--drop {
    margin-top: 24px;
  }

  .page-about .about-years {
    border-top: 0;
  }

  .page-about .about-year {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    padding: 20px 0 20px 0;
    border-top: 2px solid var(--ink);
    border-bottom: 0;
  }

  .page-about .about-year::before {
    left: calc(var(--about-rail) - 14px);
    top: 24px;
  }

  .page-about .about-year:last-child {
    border-bottom: 2px solid var(--ink);
  }

  .page-about .about-year:hover,
  .page-about .about-year:focus-within {
    padding-left: 14px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 116px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 4.4vw, 64px);
  }

  .page-about .about-hero-figure {
    position: sticky;
    top: 96px;
  }

  .page-about .about-flow-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(32px, 4.4vw, 60px);
  }

  .page-about .about-feedback-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4.4vw, 64px);
  }
}

@media (hover: none) {
  .page-about .about-role-duty {
    max-height: none;
    opacity: 1;
    margin-top: 14px;
  }
}

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

  .page-about .about-role:hover,
  .page-about .about-step:hover {
    transform: none;
  }
}