.page-about {
  --about-gold-line: rgba(212, 175, 55, .45);
  --about-bronze: rgba(184, 147, 84, .35);
  --about-timeline-w: 320px;
  position: relative;
  z-index: 1;
  background:
    linear-gradient(180deg,
      var(--crimson-deep) 0%,
      var(--crimson) 9%,
      var(--ivory) 42%,
      var(--ivory) 100%);
  padding: 0 0 32px;
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-wrap {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* 面包屑 */
.page-about .page-about__crumb {
  padding: 16px 0 0;
  font-size: 13px;
  color: rgba(255, 255, 240, .72);
}

.page-about .page-about__crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 240, .4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .page-about__crumb a:hover {
  color: var(--gold-light);
  border-color: var(--gold-light);
}

.page-about .page-about__crumb [aria-current="page"] {
  color: var(--gold-light);
  border-bottom: 0;
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 28px 0 32px;
  color: var(--ivory);
}

.page-about .about-hero__visual {
  position: relative;
  width: 100%;
  max-width: 420px;
  height: 520px;
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid var(--about-gold-line);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(212, 175, 55, .3);
  pointer-events: none;
}

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

.page-about .about-hero__kick {
  margin: 0 0 10px;
  color: var(--gold-light);
  font-size: 13px;
  letter-spacing: .16em;
}

.page-about .about-hero__title {
  max-width: 18ch;
  margin: 0 0 16px;
  font-family: var(--serif);
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.14;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 58ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 240, .88);
}

.page-about .about-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chip {
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(230, 200, 124, .5);
  color: var(--gold-light);
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: .05em;
}

/* 章节头 */
.page-about .about-section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 28px;
}

.page-about .about-kicker {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--gold-brown);
  border: 1px solid var(--about-bronze);
  padding: 4px 10px;
  transform: skewX(-8deg);
}

.page-about .about-section-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.2;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-section-desc {
  max-width: 66ch;
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: #4a4a42;
}

/* 缘起 */
.page-about .about-origin {
  padding: 32px 0 28px;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-origin__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: #2b2b26;
}

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

.page-about .about-quote {
  position: relative;
  align-self: start;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(212, 175, 55, .08), transparent 70%),
    var(--paper);
  border-left: 3px solid var(--gold);
  padding: 20px 22px;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  color: #40392f;
  box-shadow: 6px 6px 0 rgba(26, 26, 26, .05);
}

.page-about .about-quote p:first-child {
  margin: 0 0 10px;
}

.page-about .about-note {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid rgba(184, 147, 84, .35);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gold-brown);
}

/* 成长时间轴 */
.page-about .about-milestones {
  padding: 32px 0;
}

.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-timeline {
  position: relative;
  counter-reset: milestone;
}

.page-about .about-timeline::before {
  content: "";
  display: none;
  position: absolute;
  left: 82px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(184, 147, 84, .2) 100%);
}

.page-about .about-milestone {
  position: relative;
  margin: 0 0 14px;
  padding: 4px 0 2px;
  background: rgba(255, 255, 255, .68);
  border: 1px solid rgba(184, 147, 84, .22);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-milestone:hover {
  background: rgba(255, 255, 255, .92);
  border-color: rgba(212, 175, 55, .55);
  box-shadow: 6px 6px 0 rgba(26, 26, 26, .05);
}

.page-about .about-milestone__toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  width: 100%;
  padding: 16px 18px;
  background: transparent;
  border: none;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.page-about .about-milestone__year {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--crimson);
}

.page-about .about-milestone__title {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-milestone__arrow {
  color: var(--gold);
  font-size: 22px;
  line-height: 1;
  transition: transform var(--dur) var(--ease);
}

.page-about .about-milestone[data-expanded="true"] .about-milestone__arrow {
  transform: rotate(45deg);
}

.page-about .about-milestone__body {
  margin-top: 4px;
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #3c3c35;
}

.page-about .about-milestone[data-expanded="true"] .about-milestone__body {
  border-top: 1px solid rgba(184, 147, 84, .28);
  padding-top: 12px;
  animation: aboutMilestoneIn var(--dur) var(--ease);
}

.page-about .about-milestone[data-expanded="false"] .about-milestone__body {
  display: none;
}

.page-about .about-milestone__body p {
  margin: 0;
}

.page-about .about-timeline__media {
  display: none;
}

.page-about .about-timeline__media img {
  width: 100%;
  height: 600px;
  object-fit: cover;
  border: 1px solid rgba(184, 147, 84, .4);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 100%, 0 100%);
}

.page-about .about-timeline__media-note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--gold-brown);
}

/* 团队 */
.page-about .about-team {
  background:
    linear-gradient(135deg, rgba(212, 175, 55, .08), transparent 46%),
    var(--crimson-deep);
  color: var(--ivory);
  padding: 40px 0 32px;
}

.page-about .about-team .about-section-title {
  color: var(--ivory);
}

.page-about .about-team .about-section-desc {
  color: rgba(255, 255, 240, .78);
}

.page-about .about-team__roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-team-card {
  background: rgba(255, 255, 240, .07);
  border: 1px solid rgba(212, 175, 55, .35);
  padding: 20px;
  height: 100%;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-team-card:hover {
  background: rgba(255, 255, 240, .12);
  transform: translateY(-3px);
}

.page-about .about-team-card__num {
  margin: 0;
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-light);
}

.page-about .about-team-card__role {
  margin: 10px 0 8px;
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ivory);
}

.page-about .about-team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 240, .8);
}

.page-about .about-team__media {
  position: relative;
  margin: 0;
}

.page-about .about-team__media::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(230, 200, 124, .4);
  pointer-events: none;
}

.page-about .about-team__media img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  display: block;
}

.page-about .about-team__media figcaption {
  padding: 12px 4px 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 240, .7);
}

/* 理念 */
.page-about .about-philosophy {
  padding: 40px 0 28px;
  background:
    radial-gradient(600px 160px at 85% 0%, rgba(212, 175, 55, .1), transparent 70%),
    var(--ivory);
}

.page-about .about-principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-principle {
  padding: 18px 20px;
  background: var(--paper);
  border-top: 2px solid var(--gold);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, .04);
}

.page-about .about-principle__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--crimson);
  border-bottom: 1px solid rgba(166, 25, 46, .3);
  padding-bottom: 2px;
}

.page-about .about-principle p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #3c3c35;
}

.page-about .about-philosophy__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gold-brown);
  font-weight: 600;
}

/* 成绩 */
.page-about .about-numbers {
  background:
    linear-gradient(180deg, rgba(184, 147, 84, .12) 0%, transparent 90%),
    var(--ivory);
  padding: 36px 0 32px;
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
}

.page-about .about-stat-card {
  position: relative;
  padding: 18px 14px;
  background: var(--paper);
  border-top: 2px solid var(--gold);
  box-shadow: 4px 4px 0 rgba(26, 26, 26, .04);
}

.page-about .stat-num {
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--crimson);
}

.page-about .stat-num--gold {
  color: var(--gold);
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: #4a4a42;
}

.page-about .about-award {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-top: 24px;
  padding: 18px 20px;
  background: linear-gradient(90deg, rgba(166, 25, 46, .08), transparent 75%);
  border: 1px solid rgba(212, 175, 55, .5);
}

.page-about .about-award__icon {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  color: var(--gold);
}

.page-about .about-award__title {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-award__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: #4a4a42;
}

/* 页尾行动区 */
.page-about .about-cta {
  background:
    linear-gradient(135deg, rgba(212, 175, 55, .1), transparent 55%),
    var(--ink);
  color: var(--ivory);
  padding: 40px 0 32px;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 34px);
  color: var(--ivory);
}

.page-about .about-cta__desc {
  max-width: 58ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 240, .78);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-cta__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(255, 255, 240, .05);
  border: 1px solid rgba(230, 200, 124, .25);
  color: var(--ivory);
  text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-cta__link:hover {
  background: rgba(212, 175, 55, .14);
  border-color: rgba(230, 200, 124, .6);
  transform: translateY(-2px);
}

.page-about .about-cta__name {
  font-size: 15px;
  font-weight: 600;
}

.page-about .about-cta__arrow {
  color: var(--gold);
  font-size: 20px;
}

/* 动画 */
@keyframes aboutMilestoneIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 640px) {
  .page-about .about-wrap {
    width: min(1120px, calc(100% - 48px));
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
  }

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

@media (min-width: 760px) {
  .page-about .about-section-head {
    gap: 6px;
  }

  .page-about .about-timeline::before {
    display: block;
  }

  .page-about .about-milestone {
    margin-left: 40px;
    padding-left: 0;
  }

  .page-about .about-milestone__toggle {
    padding-left: 46px;
  }

  .page-about .about-milestone__body {
    padding-left: 46px;
  }

  .page-about .about-milestone[data-expanded="true"] .about-milestone__body {
    padding-left: 46px;
  }

  .page-about .about-milestone__year {
    font-size: 34px;
  }

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

  .page-about .about-team__media img {
    max-height: 380px;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 960px) {
  .page-about {
    padding-bottom: 48px;
  }

  .page-about .about-wrap {
    width: min(1160px, calc(100% - 64px));
  }

  .page-about .page-about__crumb {
    padding-top: 24px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(340px, 440px);
    gap: 48px;
    align-items: center;
    padding: 56px 0 72px;
  }

  .page-about .about-hero__visual {
    order: 2;
    max-width: none;
    height: 600px;
    margin: 0;
  }

  .page-about .about-hero__content {
    order: 1;
  }

  .page-about .about-origin {
    padding: 52px 0 36px;
  }

  .page-about .about-milestones {
    padding: 52px 0;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1fr) var(--about-timeline-w);
    gap: 44px;
  }

  .page-about .about-timeline__media {
    display: block;
    position: sticky;
    top: 28px;
    align-self: start;
  }

  .page-about .about-team {
    padding: 56px 0 44px;
  }

  .page-about .about-team__media img {
    max-height: 400px;
  }

  .page-about .about-philosophy {
    padding: 56px 0 40px;
  }

  .page-about .about-numbers {
    padding: 52px 0 44px;
  }

  .page-about .about-cta {
    padding: 56px 0 48px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-wrap {
    width: 1200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}