.page-about {
  --about-gap: clamp(56px, 8vw, 104px);
  --about-zone-1: rgba(76, 224, 122, 0.16);
  --about-zone-2: rgba(76, 224, 122, 0.10);
  --about-zone-3: rgba(76, 224, 122, 0.06);
  --about-zone-4: rgba(76, 224, 122, 0.03);
  padding-top: clamp(18px, 3vw, 34px);
  padding-bottom: clamp(48px, 7vw, 96px);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  margin: 0 0 clamp(14px, 2vw, 22px);
}
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
}
.page-about .crumbs li {
  display: inline-flex;
  align-items: center;
}
.page-about .crumbs li + li::before {
  content: "/";
  margin: 0 9px;
  color: var(--line-strong);
}
.page-about .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}
.page-about .crumbs li[aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero__lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.06;
  font-size: clamp(2.05rem, 6.2vw, 4.15rem);
  color: var(--text);
}
.page-about .about-hero__intro {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__panel {
  padding: clamp(18px, 2.6vw, 26px);
}
.page-about .about-hero__panel .panel__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.02rem, 2.2vw, 1.22rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--text);
}

.page-about .zone-stack {
  display: grid;
  gap: 7px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: zone;
}
.page-about .zone-stack__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 15px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line-soft);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--text);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .zone-stack__item .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
}
.page-about .zone-stack__item--1 {
  background: var(--about-zone-1);
  border-color: rgba(76, 224, 122, 0.36);
}
.page-about .zone-stack__item--2 { background: var(--about-zone-2); }
.page-about .zone-stack__item--3 { background: var(--about-zone-3); }
.page-about .zone-stack__item--4 { background: var(--about-zone-4); }
.page-about .zone-stack__item:hover {
  transform: translateX(3px);
  border-color: rgba(76, 224, 122, 0.5);
}
.page-about .zone-stack__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 四段分区 ---------- */
.page-about .about-zones {
  padding-top: var(--about-gap);
}
.page-about .about-zones__grid {
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(22px, 3vw, 34px);
}
.page-about .zone-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .zone-row {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0 22px 18px;
  border-top: 1px solid var(--line-soft);
}
.page-about .zone-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 3px;
  border-radius: 3px;
  background: var(--line-strong);
  transition: background 0.2s var(--ease);
}
.page-about .zone-row--1::before { background: var(--signal); }
.page-about .zone-row--2::before { background: rgba(76, 224, 122, 0.62); }
.page-about .zone-row--3::before { background: rgba(76, 224, 122, 0.36); }
.page-about .zone-row--4::before { background: rgba(76, 224, 122, 0.2); }
.page-about .zone-row:hover::before { background: var(--signal); }
.page-about .zone-row__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal);
  letter-spacing: 0.08em;
  padding-top: 5px;
}
.page-about .zone-row__text h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--text);
}
.page-about .zone-row__text p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .about-zones__why {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(242, 178, 60, 0.07);
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .about-zones__figure {
  margin: 0;
}

/* ---------- 媒体 ---------- */
.page-about .media {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line-soft);
}
.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media__caption {
  padding: 12px 14px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: var(--about-gap);
  padding: clamp(48px, 7vw, 92px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 18, 15, 0.94), rgba(11, 31, 26, 0.72));
  overflow: hidden;
}
.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  pointer-events: none;
}
.page-about .about-timeline__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-timeline__lede {
  margin: 12px 0 0;
  max-width: 44ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .about-timeline__layout {
  display: grid;
  gap: clamp(30px, 4vw, 50px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--signal), rgba(76, 224, 122, 0.06));
}
.page-about .tl__node {
  position: relative;
  padding: 0 0 22px 34px;
  outline: none;
}
.page-about .tl__node:last-child {
  padding-bottom: 0;
}
.page-about .tl__dot {
  position: absolute;
  left: 0;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--signal);
  box-shadow: 0 0 0 4px rgba(76, 224, 122, 0.1);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .tl__card {
  padding: 16px 18px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: rgba(18, 18, 18, 0.68);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-about .tl__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .tl__ver {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: var(--pill);
  border: 1px solid rgba(76, 224, 122, 0.4);
  color: var(--signal);
  background: rgba(76, 224, 122, 0.08);
}
.page-about .tl__ver--rust {
  border-color: rgba(196, 85, 63, 0.55);
  color: var(--rust);
  background: rgba(196, 85, 63, 0.12);
}
.page-about .tl__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.04rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--text);
}
.page-about .tl__detail {
  margin: 9px 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .tl__node:hover .tl__card,
.page-about .tl__node:focus-within .tl__card,
.page-about .tl__node:focus .tl__card {
  transform: translateY(-2px);
  border-color: rgba(76, 224, 122, 0.44);
  background: rgba(28, 43, 39, 0.9);
}
.page-about .tl__node:hover .tl__dot,
.page-about .tl__node:focus .tl__dot,
.page-about .tl__node:focus-within .tl__dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 8px rgba(76, 224, 122, 0.16);
}
.page-about .tl__node:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
  border-radius: var(--radius-m);
}

.page-about .tl__panel {
  padding: clamp(18px, 2.4vw, 24px);
}
.page-about .tl__panel .panel__head h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .zmap {
  display: grid;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .zmap__layer a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  font-family: var(--font-head);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.page-about .zmap__layer--1 a { background: var(--about-zone-1); }
.page-about .zmap__layer--2 a { background: var(--about-zone-2); }
.page-about .zmap__layer--3 a { background: var(--about-zone-3); }
.page-about .zmap__layer--4 a { background: var(--about-zone-4); }
.page-about .zmap__layer a span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--muted);
}
.page-about .zmap__layer a:hover,
.page-about .zmap__layer a:focus-visible {
  border-color: var(--signal);
  background: rgba(76, 224, 122, 0.16);
  transform: translateY(-2px);
  outline: none;
}
.page-about .zmap__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 团队与节奏 ---------- */
.page-about .about-team {
  padding-top: var(--about-gap);
}
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__body h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--text);
}
.page-about .about-team__lede {
  margin: 16px 0 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .shift {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .shift li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .shift li > span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--signal);
  padding-top: 4px;
}
.page-about .shift p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  padding-top: var(--about-gap);
}
.page-about .about-coverage__grid {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
  margin-top: clamp(22px, 3vw, 34px);
}
.page-about .about-coverage__lede {
  margin: 0;
  max-width: 50ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .cat-list li {
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(18, 18, 18, 0.55);
  font-size: 0.87rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.page-about .cat-list li:nth-child(4n + 1) {
  border-color: rgba(76, 224, 122, 0.34);
  color: var(--text);
}
.page-about .about-coverage__foot {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .cover-panel {
  padding: clamp(18px, 2.4vw, 26px);
}
.page-about .cover-panel .panel__head h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .cover-stats {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .cover-stats li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .cover-stats strong {
  font-family: var(--font-head);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--signal);
  line-height: 1;
}
.page-about .cover-stats span {
  font-size: 0.88rem;
  color: var(--muted);
  text-align: right;
}
.page-about .cover-stats__note {
  margin: 16px 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 常用路径 ---------- */
.page-about .about-path {
  padding-top: var(--about-gap);
}
.page-about .path-list {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .path-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(28, 43, 39, 0.7), rgba(18, 18, 18, 0.7));
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .path-step:hover {
  transform: translateY(-2px);
  border-color: rgba(76, 224, 122, 0.36);
}
.page-about .path-step__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--signal);
}
.page-about .path-step h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.04rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--text);
}
.page-about .path-step p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .path-step a {
  margin-top: auto;
  padding-top: 10px;
  font-size: 0.88rem;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(76, 224, 122, 0.32);
  align-self: flex-start;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}
.page-about .path-step a::after {
  content: " →";
}
.page-about .path-step a:hover,
.page-about .path-step a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--signal);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-top: var(--about-gap);
}
.page-about .about-cta__box {
  display: grid;
  gap: 22px;
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid rgba(76, 224, 122, 0.34);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(76, 224, 122, 0.14), transparent 60%),
    linear-gradient(180deg, rgba(28, 43, 39, 0.86), rgba(11, 31, 26, 0.86));
}
.page-about .about-cta__box h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--text);
}
.page-about .about-cta__box p {
  margin: 12px 0 0;
  max-width: 48ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--paper);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .path-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-cta__box {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline__layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .tl__panel {
    position: sticky;
    top: calc(var(--head-h) + 22px);
  }
}

@media (min-width: 1160px) {
  .page-about .path-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .zone-stack__item,
  .page-about .zmap__layer a,
  .page-about .path-step,
  .page-about .tl__card,
  .page-about .tl__dot {
    transition: none;
  }
  .page-about .zone-stack__item:hover,
  .page-about .zmap__layer a:hover,
  .page-about .path-step:hover,
  .page-about .tl__node:hover .tl__card,
  .page-about .tl__node:hover .tl__dot {
    transform: none;
  }
}