.page-about {
  --about-rail: 248px;
  --about-gap: 56px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(52px, 8vw, 100px) 0 clamp(84px, 12vw, 132px);
  background:
    radial-gradient(120% 100% at 92% 2%, rgba(29, 76, 116, .88) 0%, rgba(29, 76, 116, 0) 58%),
    linear-gradient(155deg, var(--deep-dark) 0%, var(--deep) 58%, #0e3559 100%);
  color: var(--paper);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.page-about .about-hero__crumbs a,
.page-about .about-hero__crumbs .crumbs__sep {
  color: var(--gold-soft);
  text-decoration: none;
}

.page-about .about-hero__crumbs .crumbs__current {
  color: rgba(247, 242, 231, .78);
}

.page-about .about-hero__eyebrow {
  margin: 18px 0 14px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(32px, 5.4vw, 60px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: .004em;
}

.page-about .about-hero__text {
  margin: 0 0 28px;
  max-width: 620px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(247, 242, 231, .84);
}

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

.page-about .about-hero__wedge {
  position: absolute;
  left: -4%;
  right: -4%;
  bottom: -2px;
  height: 78px;
  background: linear-gradient(90deg, var(--coral) 0%, var(--gold) 52%, var(--mint) 100%);
  clip-path: polygon(0 100%, 100% 20%, 100% 100%);
  opacity: .9;
  z-index: 1;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-deep);
  border: 1px solid var(--line-deep);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
  padding: 20px 18px;
  background: rgba(6, 27, 46, .74);
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold-soft);
}

.page-about .about-fact__value {
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: .04em;
  color: var(--gold);
}

/* ---------- 主体布局 ---------- */
.page-about .about-body {
  background: var(--paper);
  padding: clamp(56px, 8vw, 92px) 0 clamp(64px, 9vw, 104px);
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 44px;
}

.page-about .about-rail__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--gold);
  font-size: 13px;
  line-height: 1.8;
  color: var(--stone);
  max-width: 32em;
}

.page-about .about-block {
  padding: 0 0 clamp(44px, 6vw, 76px);
  margin: 0 0 clamp(40px, 5.5vw, 68px);
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .about-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 16px;
  align-items: baseline;
  margin-bottom: 18px;
}

.page-about .about-block__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--coral);
  padding-top: 8px;
}

.page-about .about-block__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.1vw, 34px);
  line-height: 1.26;
  font-weight: 800;
  color: var(--deep);
}

.page-about .about-block__note {
  display: none;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--stone);
  writing-mode: vertical-rl;
  text-orientation: upright;
  justify-self: end;
  align-self: stretch;
  max-height: 96px;
  overflow: hidden;
}

.page-about .about-block__lead {
  margin: 0 0 26px;
  max-width: 42em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-block__foot {
  margin: 22px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .about-inline {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
}

.page-about .about-inline:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 图组 ---------- */
.page-about .figure {
  margin: 0 0 30px;
}

.page-about .figure__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--deep);
}

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

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--deep-light) 42%, var(--line) 100%);
}

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

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, .14);
}

.page-about .about-node__meta {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--deep-light);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-node__text {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-node__more {
  max-height: 0;
  margin: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--stone);
  border-left: 2px solid var(--gold);
  padding-left: 12px;
  transition: max-height .3s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  max-height: 140px;
  margin-top: 10px;
  opacity: 1;
}

/* ---------- 团队比例条 ---------- */
.page-about .about-bars {
  display: grid;
  gap: 20px;
  margin: 0 0 28px;
}

.page-about .about-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-bar__head strong {
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-bar__head .mono {
  font-family: var(--font-mono);
  letter-spacing: .05em;
  color: var(--deep-light);
}

.page-about .about-bar__track {
  height: 10px;
  border-radius: var(--r-pill);
  background: var(--paper-2);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  transform-origin: left center;
  animation: about-bar-grow .9s var(--ease) both;
}

.page-about .about-bar__fill--dev {
  width: 55%;
  background: linear-gradient(90deg, var(--deep), var(--deep-light));
}

.page-about .about-bar__fill--data {
  width: 27%;
  background: linear-gradient(90deg, var(--deep-light), var(--mint));
}

.page-about .about-bar__fill--care {
  width: 18%;
  background: linear-gradient(90deg, var(--coral), var(--gold));
}

@keyframes about-bar-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-about .about-shift {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--coral);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .62);
  box-shadow: var(--shadow-s);
}

.page-about .about-shift__title {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-shift__list {
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  gap: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  position: relative;
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--deep-light);
  border-radius: var(--r-sm);
  background: #fffdf9;
  box-shadow: var(--shadow-s);
}

.page-about .about-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--deep);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 对比表 ---------- */
.page-about .about-table__caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--stone);
}

.page-about .about-table th[scope="row"] {
  font-weight: 700;
  color: var(--deep);
  white-space: nowrap;
}

/* ---------- 指标盘 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 6px;
}

.page-about .about-metric {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .6);
}

.page-about .about-metric__value {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: .02em;
  color: var(--deep);
}

.page-about .about-metric__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 收束卡片 ---------- */
.page-about .about-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--r-md);
  background: #fffdf9;
  box-shadow: var(--shadow-s);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-card--alert {
  border-left-color: var(--coral);
}

.page-about .about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  border-color: var(--deep-light);
}

.page-about .about-card__title {
  margin: 0;
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-card__link {
  margin-top: auto;
  align-self: flex-start;
  font-size: 14px;
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-card__link:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 7vw, 76px) 0;
  background: linear-gradient(140deg, var(--deep-dark) 0%, var(--deep) 62%, var(--deep-light) 100%);
  color: var(--paper);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.3;
  font-weight: 800;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 242, 231, .8);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-block__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 12px 20px;
  }

  .page-about .about-block__note {
    display: block;
  }
}

@media (min-width: 780px) {
  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 30px;
    right: -18px;
    width: 18px;
    height: 1px;
    background: var(--gold);
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: center;
    gap: 44px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 108px;
  }
}

@media (max-width: 719px) {
  .page-about .about-node__more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }

  .page-about .about-fact__value {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-bar__fill {
    animation: none;
  }

  .page-about .about-card,
  .page-about .about-node__more,
  .page-about .about-card__link {
    transition: none;
  }
}