.page-about {
  --about-rail-w: 232px;
  --about-card: rgba(14, 59, 46, .55);
  --about-anchor-offset: calc(var(--header-h) + 24px);
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .crumbs {
  padding: 18px 0 0;
}

.page-about .about-intro {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(24px, 4vw, 44px);
}

.page-about .about-intro::before {
  content: "";
  position: absolute;
  inset: -8% -6% auto -6%;
  height: min(420px, 58vw);
  background:
    radial-gradient(closest-side at 26% 34%, rgba(0, 229, 199, .14), transparent 72%),
    radial-gradient(closest-side at 78% 62%, rgba(255, 138, 61, .10), transparent 74%);
  pointer-events: none;
}

.page-about .about-intro__inner {
  position: relative;
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-about .about-intro__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--text-strong);
  margin: 14px 0 0;
  max-width: 18ch;
}

.page-about .about-intro__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

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

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

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

/* ---------- 记分牌条 ---------- */
.page-about .about-score {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--line);
}

.page-about .about-score .scoreboard__cell {
  background: linear-gradient(150deg, rgba(14, 59, 46, .72), rgba(7, 26, 20, .92));
  padding: 16px 18px;
}

.page-about .about-score .scoreboard__k {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cool);
}

.page-about .about-score .scoreboard__v {
  display: block;
  margin-top: 6px;
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--glow);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  padding: clamp(30px, 5vw, 66px) 0 clamp(40px, 6vw, 84px);
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

/* ---------- 左侧章节轨道 ---------- */
.page-about .about-rail {
  display: none;
}

.page-about .about-rail__label {
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--cool);
  margin: 0 0 14px;
}

.page-about .about-rail__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
}

.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 199, .28) 62%, rgba(0, 229, 199, 0));
}

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

.page-about .about-rail__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  color: var(--cool);
  text-decoration: none;
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition: color var(--speed) ease, transform var(--speed) ease;
}

.page-about .about-rail__link::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 14px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--pitch);
  border: 2px solid var(--line-strong);
  transition: border-color var(--speed) ease, background-color var(--speed) ease, box-shadow var(--speed) ease;
}

.page-about .about-rail__num {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--text-strong);
  transform: translateX(2px);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 4px;
}

.page-about .about-rail__link:hover::before,
.page-about .about-rail__link[aria-current="true"]::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, .16);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--text-strong);
}

/* ---------- 章节 ---------- */
.page-about .about-content {
  display: grid;
  gap: clamp(36px, 4.5vw, 64px);
}

.page-about .about-chapter {
  position: relative;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--about-anchor-offset);
}

.page-about .about-chapter::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 138, 61, 0));
}

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

.page-about .about-chapter__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--orange);
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.3vw, 34px);
  line-height: 1.18;
  color: var(--text-strong);
  margin: 0;
  max-width: 22ch;
}

.page-about .about-chapter__body {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.page-about .about-text {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.86;
  color: var(--text);
}

/* ---------- 01 承诺刻度 ---------- */
.page-about .about-marks {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-mark {
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: linear-gradient(100deg, rgba(0, 229, 199, .08), rgba(7, 26, 20, 0) 78%);
}

.page-about .about-mark__v {
  display: block;
  font-size: 16px;
  color: var(--glow);
}

.page-about .about-mark__k {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cool);
}

/* ---------- 02 工序 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__step {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, var(--about-card), rgba(7, 26, 20, .46));
  transition: border-color var(--speed) ease, transform var(--speed) ease;
}

.page-about .about-flow__step:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-flow__time {
  display: block;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .about-flow__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--text-strong);
  margin: 8px 0 0;
}

.page-about .about-flow__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-figure {
  margin: 4px 0 0;
}

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

/* ---------- 03 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-team {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg) var(--radius-sm) var(--radius-lg) var(--radius-sm);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 199, .10), transparent 62%),
    var(--about-card);
  transition: border-color var(--speed) ease, transform var(--speed) ease;
}

.page-about .about-team:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .about-team__num {
  display: block;
  font-size: 32px;
  line-height: 1;
  color: var(--glow);
}

.page-about .about-team__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--text-strong);
  margin: 12px 0 0;
}

.page-about .about-team__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-team__more {
  margin-top: 12px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.page-about .about-team__more summary {
  cursor: pointer;
  font-size: 13px;
  color: var(--cyan);
  list-style: none;
}

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

.page-about .about-team__more summary::before {
  content: "+ ";
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-about .about-team__more[open] summary::before {
  content: "– ";
}

.page-about .about-team__more summary:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--cool);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 04 荣誉徽章 ---------- */
.page-about .about-honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-honor {
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--orange);
  border-radius: 4px 16px 4px 16px;
  background: linear-gradient(128deg, rgba(28, 43, 38, .96), rgba(14, 59, 46, .78));
  transition: border-color var(--speed) ease, background-color var(--speed) ease;
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-visible {
  border-left-color: var(--glow);
  border-color: var(--glow);
}

.page-about .about-honor:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 3px;
}

.page-about .about-honor__label {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--text-strong);
}

.page-about .about-honor__note {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cool);
  transition: max-height var(--speed) ease, opacity var(--speed) ease, margin-top var(--speed) ease;
}

.page-about .about-honor:hover .about-honor__note,
.page-about .about-honor:focus-visible .about-honor__note {
  max-height: 140px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 05 指标与服务 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-metric {
  padding: 18px;
  background: var(--ink);
}

.page-about .about-metric__v {
  display: block;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-metric__k {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--cool);
}

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

.page-about .about-serve li {
  position: relative;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--text);
}

.page-about .about-serve li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 13px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 199, .1));
}

/* ---------- 06 未来方向与收束 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-next__item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(14, 59, 46, .62), rgba(7, 26, 20, .28));
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-strong);
  margin: 0;
}

.page-about .about-next__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 6px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(115deg, rgba(14, 59, 46, .92), rgba(7, 26, 20, .88)),
    var(--pitch);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text-strong);
}

.page-about .about-cta__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--cool);
  max-width: 56ch;
}

.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-score {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 700px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-intro__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(32px, 4vw, 56px);
  }

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

@media (min-width: 1000px) {
  .page-about .about-body__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 64px);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: var(--about-anchor-offset);
    align-self: start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-team,
  .page-about .about-rail__link {
    transition: none;
  }

  .page-about .about-flow__step:hover,
  .page-about .about-team:hover,
  .page-about .about-rail__link:hover {
    transform: none;
  }
}