.page-about {
  position: relative;
  overflow-x: clip;
  color: var(--text);
  font-family: var(--font-body);
  --about-cut: 14px;
  --about-line-gap: 18px;
}

.page-about::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--line) 0 6px, transparent 6px 16px);
  pointer-events: none;
}

@media (min-width: 1120px) {
  .page-about::before {
    left: max(10px, calc((100% - var(--max)) / 2 - 30px));
  }
}

@media (max-width: 1119px) {
  .page-about::before {
    display: none;
  }
}

.page-about .breadcrumbs {
  padding-block: 16px 4px;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-block: clamp(14px, 2.5vw, 26px) 0;
}

.page-about .about-hero__frame {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.2vw, 40px);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(20px, 4vw, 46px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(185, 242, 39, 0.08), transparent 58%),
    linear-gradient(165deg, var(--panel) 0%, var(--ink) 74%);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-hero__readout {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-readout {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

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

.page-about .about-readout__k {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-readout__v {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 900px) {
  .page-about .about-hero__frame {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-hero__readout {
    padding-top: 0;
    padding-left: clamp(16px, 2.4vw, 28px);
    border-top: 0;
    border-left: 1px solid var(--line);
    align-self: stretch;
    align-content: center;
  }
}

/* ---------- 赛前十分钟 ---------- */
.page-about .about-why__lead,
.page-about .about-flow__lead,
.page-about .about-team__lead,
.page-about .about-timeline__lead,
.page-about .about-reach__text {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-why__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .about-why__item {
  display: grid;
  gap: 6px;
  padding: clamp(16px, 2.6vw, 26px);
  background: var(--panel);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-why__item:hover {
  background: var(--panel-2);
}

.page-about .about-why__stamp {
  font-family: var(--font-num);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-why__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.4vw, 1.35rem);
  letter-spacing: -0.01em;
}

.page-about .about-why__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-why__item {
    grid-template-columns: 118px minmax(0, 1fr);
    column-gap: 22px;
  }

  .page-about .about-why__stamp {
    grid-row: 1 / span 2;
    align-self: start;
    padding-top: 4px;
  }
}

/* ---------- 生产流程 ---------- */
.page-about .about-flow__media {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-step {
  position: relative;
  padding: 18px 20px 20px;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% 50%, calc(100% - var(--about-cut)) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background: var(--panel-2);
}

.page-about .about-step__no {
  display: block;
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-step__name {
  display: block;
  margin-top: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
}

.page-about .about-step__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 880px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-years {
  display: flex;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 24px);
  padding: 16px 2px 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-years::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-years::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-about .about-year {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: grid;
  gap: 8px;
  min-width: 158px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-year:hover,
.page-about .about-year:focus-visible {
  background: var(--panel-2);
  border-color: var(--lime);
}

.page-about .about-year__diamond {
  width: 9px;
  height: 9px;
  transform: rotate(45deg);
  background: var(--lime);
}

.page-about .about-year__label {
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-year__meta {
  font-size: 0.82rem;
  color: var(--muted);
}

.page-about .about-milestones {
  margin-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .about-milestone {
  border-bottom: 1px solid var(--line);
}

.page-about .about-milestone > summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 15px 12px;
  list-style: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-milestone > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-milestone > summary::after {
  content: "▸";
  margin-left: auto;
  color: var(--lime);
  font-size: 0.9rem;
  transform: rotate(0deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-milestone[open] > summary::after {
  transform: rotate(90deg);
}

.page-about .about-milestone > summary:hover,
.page-about .about-milestone > summary:focus-visible {
  background: var(--panel);
}

.page-about .about-milestone[open] > summary {
  border-left-color: var(--lime);
  color: var(--lime-soft);
}

.page-about .about-milestone__year {
  font-family: var(--font-num);
  font-size: 0.95rem;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-milestone__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

.page-about .about-milestone__body {
  padding: 0 12px 18px 31px;
}

.page-about .about-milestone__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-team__panels {
  display: grid;
  gap: 10px;
}

.page-about .about-team__panel {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-team__panel:hover,
.page-about .about-team__panel:focus-within {
  background: var(--panel-2);
  border-color: var(--lime);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__name {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

.page-about .about-team__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 14px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-team__aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

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

.page-about .about-team__cap {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-team__panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 24px);
}

.page-about .about-reach__cell {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-reach__label {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-reach__media {
  margin: clamp(20px, 3vw, 28px) 0 0;
}

@media (min-width: 720px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 服务准则 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 18px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-principle {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--line);
  background: var(--ink);
  transition: border-top-color var(--dur) var(--ease);
}

.page-about .about-principle:hover {
  border-top-color: var(--lime);
}

.page-about .about-principle__no {
  display: block;
  font-family: var(--font-num);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1;
  color: var(--line);
}

.page-about .about-principle__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  letter-spacing: -0.01em;
}

.page-about .about-principle__text {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-principle__text a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(185, 242, 39, 0.4);
}

.page-about .about-principle__text a:hover {
  color: var(--lime-soft);
}

@media (min-width: 860px) {
  .page-about .about-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 收尾行动 ---------- */
.page-about .about-next {
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-about .about-next__panel {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid var(--lime);
  background:
    linear-gradient(150deg, rgba(185, 242, 39, 0.09), transparent 62%),
    var(--panel);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.page-about .about-next__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-next__text {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

@media (min-width: 880px) {
  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}