.page-about {
  --about-ink: #171310;
  --about-ink-soft: #4a4038;
  --about-mark: #0E6B64;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 var(--space-m);
  background:
    radial-gradient(115% 85% at 84% 8%, rgba(30, 92, 122, .58) 0%, rgba(10, 42, 67, 0) 64%),
    var(--deep-sea);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__deco {
  position: absolute;
  z-index: 1;
  right: -6vw;
  bottom: -3vw;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(140px, 34vw, 400px);
  line-height: .78;
  letter-spacing: .04em;
  color: rgba(53, 224, 208, .07);
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--space-s);
  margin-top: 22px;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 66px);
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--text);
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(30, 92, 122, .9);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
}

.page-about .about-hero__k {
  font-family: var(--font-serif);
  letter-spacing: .08em;
  color: var(--fog);
}

.page-about .about-hero__v {
  font-family: var(--font-mono);
  letter-spacing: .05em;
  color: var(--cyan);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure .figure-frame {
  border: 2px solid rgba(53, 224, 208, .38);
}

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

.page-about figcaption {
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--fog);
}

/* ---------- 区块与标题 ---------- */
.page-about .about-head {
  max-width: 60ch;
}

.page-about .about-head h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--text);
}

.page-about .about-head p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  border-bottom: 1px solid rgba(30, 92, 122, .55);
}

.page-about .timeline {
  list-style: none;
  margin: var(--space-s) 0 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 34px 30px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--deep-sea);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 208, .13);
}

.page-about .timeline__item::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 32px;
  bottom: 0;
  border-left: 2px dashed rgba(53, 224, 208, .26);
}

.page-about .timeline__item:last-child::after {
  content: none;
}

.page-about .timeline__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: clamp(34px, 7vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .timeline__year small {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--fog);
}

.page-about .timeline__card {
  margin-top: 14px;
  padding: 20px 20px 18px;
  background: var(--chart);
  border: 1px solid var(--tide);
  border-left: 3px solid rgba(53, 224, 208, .5);
  transition: transform .3s var(--ease), border-left-color .3s var(--ease);
}

.page-about .timeline__card:hover {
  transform: translateX(5px);
  border-left-color: var(--cyan);
}

.page-about .timeline__card h3 {
  margin: 12px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text);
}

.page-about .timeline__card p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .timeline__gain {
  padding-top: 10px;
  border-top: 1px dashed rgba(53, 224, 208, .25);
  color: var(--fog) !important;
  font-size: 14px !important;
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  display: grid;
  gap: var(--space-s);
  margin-bottom: var(--space-s);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure .figure-frame {
  border: 2px solid rgba(53, 224, 208, .3);
}

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

.page-about .team-card {
  background: var(--chart);
  border: 1px solid var(--tide);
  border-radius: 2px;
  transition: border-color .26s var(--ease), transform .26s var(--ease);
}

.page-about .team-card:hover {
  border-color: rgba(53, 224, 208, .6);
  transform: translateY(-3px);
}

.page-about .team-card summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  display: grid;
  gap: 4px;
  padding: 18px 46px 16px 18px;
}

.page-about .team-card summary::-webkit-details-marker {
  display: none;
}

.page-about .team-card summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .24s var(--ease);
}

.page-about .team-card[open] summary::after {
  transform: rotate(45deg);
}

.page-about .team-card__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .team-card__role {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
}

.page-about .team-card__hint {
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .team-card__body {
  padding: 14px 18px 18px;
  border-top: 1px dashed rgba(53, 224, 208, .22);
}

.page-about .team-card__body ul {
  margin: 0;
  padding-left: 18px;
  list-style: disc;
}

.page-about .team-card__body li {
  margin-bottom: 7px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .team-card__body li:last-child {
  margin-bottom: 0;
}

/* ---------- 内容流程（奶油纸断点） ---------- */
.page-about .about-process {
  background: var(--paper);
  color: var(--about-ink);
}

.page-about .about-process__grid {
  display: grid;
  gap: var(--space-s);
}

.page-about .about-process .about-head h2 {
  color: var(--about-ink);
}

.page-about .about-process .about-head p {
  color: var(--about-ink-soft);
}

.page-about .about-process .eyebrow {
  color: var(--about-mark);
}

.page-about .about-process .eyebrow::before {
  background: var(--about-mark);
}

.page-about .flow {
  list-style: none;
  margin: var(--space-s) 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px dashed rgba(23, 19, 16, .2);
}

.page-about .flow__step:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .flow__num {
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--about-mark);
}

.page-about .flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: .05em;
  color: var(--about-ink);
}

.page-about .flow__text {
  margin: 7px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-process__figure {
  margin: 0;
}

.page-about .about-process__figure .figure-frame {
  border: 2px solid rgba(14, 107, 100, .55);
}

.page-about .about-process__figure figcaption {
  color: rgba(23, 19, 16, .62);
}

/* ---------- 数据带 ---------- */
.page-about .about-stats {
  padding: var(--space-m) 0;
  background: var(--abyss);
  border-top: 1px solid var(--tide);
  border-bottom: 1px solid var(--tide);
}

.page-about .about-stats__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(30, 92, 122, .75);
}

.page-about .stat {
  display: grid;
  gap: 8px;
  padding: 20px 14px;
  background: var(--abyss);
}

.page-about .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .stat__unit {
  margin-left: 4px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--fog);
}

.page-about .stat__label {
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--fog);
}

.page-about .about-stats__note {
  margin: 26px 0 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.8;
  letter-spacing: .02em;
  color: var(--fog);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .honor {
  display: grid;
  gap: var(--space-s);
}

.page-about .honor__intro h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.24;
  color: var(--text);
}

.page-about .honor__intro p {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .honor__body {
  display: grid;
  gap: 26px;
}

.page-about .honor__card {
  padding: 22px 22px 20px;
  background: var(--chart);
  border: 1px solid var(--tide);
  border-top: 3px solid var(--coral);
}

.page-about .honor__big {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lemon);
}

.page-about .honor__text {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .honor__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

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

.page-about .honor-note {
  display: block;
  padding: 14px 18px;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--lemon);
  background: rgba(255, 209, 102, .09);
  border-left: 3px solid var(--lemon);
  transform: rotate(-2deg);
  transition: transform .3s var(--ease);
}

.page-about .honor-note--b {
  transform: rotate(1.6deg);
  margin-left: 6%;
}

.page-about .honor-note:hover {
  transform: rotate(0deg);
}

/* ---------- 联系 ---------- */
.page-about .about-visit {
  background: linear-gradient(180deg, rgba(18, 60, 92, .55) 0%, rgba(10, 42, 67, 0) 70%);
}

.page-about .visit {
  display: grid;
  gap: var(--space-s);
}

.page-about .visit__intro h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.24;
  color: var(--text);
}

.page-about .visit__intro p {
  margin: 14px 0 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .visit__list {
  margin: 0;
  padding: 22px 20px;
  display: grid;
  gap: 18px;
  background: var(--chart);
  border: 1px solid var(--tide);
  border-left: 3px solid var(--cyan);
}

.page-about .visit__row {
  display: grid;
  gap: 5px;
}

.page-about .contact-label {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--fog);
}

.page-about .contact-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.65;
  letter-spacing: .02em;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-about .visit__note {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px dashed rgba(30, 92, 122, .9);
  font-size: 14px;
  line-height: 1.8;
  color: var(--fog);
}

.page-about .visit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 20px;
}

.page-about .visit__links a {
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, .4);
  padding-bottom: 2px;
  transition: border-color .2s var(--ease);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-stats__inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .honor__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 64px);
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: end;
  }
  .page-about .about-team__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .9fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }
  .page-about .honor {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
  .page-about .visit {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 28px;
    padding-left: 46px;
    padding-bottom: 38px;
  }
  .page-about .timeline__item:nth-child(even) {
    padding-left: 74px;
  }
  .page-about .timeline__item::before {
    top: 18px;
  }
  .page-about .timeline__item::after {
    top: 38px;
  }
  .page-about .timeline__year {
    font-size: clamp(42px, 4.6vw, 60px);
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .page-about .timeline__card {
    margin-top: 0;
    padding: 22px 24px 20px;
  }
}

@media (min-width: 1060px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stats__inner {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .stat {
    padding: 22px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .team-card,
  .page-about .honor-note {
    transition: none;
  }
  .page-about .timeline__card:hover,
  .page-about .team-card:hover,
  .page-about .honor-note:hover {
    transform: none;
  }
}