.page-about {
  --about-rail-w: 248px;
  --about-row-gap: clamp(46px, 6vw, 84px);
  --about-col-gap: clamp(26px, 3.6vw, 58px);
  --paper-ink: #0B1512;
  --paper-ink-soft: rgba(11, 21, 18, 0.74);
  padding-block: clamp(18px, 2.6vw, 32px) clamp(56px, 8vw, 104px);
  background-image:
    radial-gradient(1120px 520px at 88% -8%, rgba(25, 227, 200, 0.09), transparent 62%),
    radial-gradient(760px 420px at 2% 8%, rgba(255, 122, 47, 0.07), transparent 66%);
  background-repeat: no-repeat;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumb {
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.page-about .about-hero {
  position: relative;
  z-index: 0;
  padding-block: clamp(10px, 2vw, 22px) clamp(20px, 3vw, 34px);
  max-width: 900px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -16px;
  right: -8px;
  width: min(34%, 300px);
  height: calc(100% + 28px);
  background: linear-gradient(158deg, rgba(18, 58, 46, 0.92) 0%, rgba(14, 31, 43, 0.35) 100%);
  border-right: 1px solid var(--line);
  transform: skewX(-12deg);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero .eyebrow {
  transform: skewX(-2deg);
}

.page-about h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 62ch;
  color: var(--steel);
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.78;
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chips .tag {
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--steel);
  background: rgba(14, 31, 43, 0.5);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-chips .tag:hover {
  border-color: var(--cyan);
  color: var(--paper);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-main {
  margin-top: clamp(34px, 4.6vw, 62px);
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: var(--about-row-gap);
  column-gap: var(--about-col-gap);
  align-items: start;
}

/* ---------- 左侧看台 rail ---------- */
.page-about .about-rail {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .rail-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-list .rail-item {
  flex: 0 0 auto;
}

.page-about .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: rgba(10, 26, 20, 0.72);
  color: var(--steel);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .rail-list a .mono {
  font-size: 11px;
  color: var(--cyan);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  border-color: var(--cyan);
  color: var(--paper);
  background: rgba(18, 58, 46, 0.6);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .about-figures > div {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--field-2);
}

.page-about .figure-num {
  font-size: 22px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .figure-label {
  font-size: 12px;
  color: var(--steel);
  letter-spacing: 0.04em;
}

.page-about .about-side-card {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 58, 46, 0.72), rgba(14, 31, 43, 0.6));
}

.page-about .side-card-title {
  margin: 0;
  font-family: var(--font-editorial);
  font-size: 16px;
  color: var(--paper);
}

.page-about .side-card-text {
  margin: 8px 0 12px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .side-card-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .side-card-link:hover,
.page-about .side-card-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 右侧长文 ---------- */
.page-about .about-section > h2 {
  margin: 0 0 16px;
  font-family: var(--font-editorial);
  font-size: clamp(22px, 2.7vw, 34px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-section p {
  margin: 0 0 16px;
  max-width: 62ch;
  color: var(--steel);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .section-note {
  font-size: 15px;
  color: var(--steel);
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
  margin-bottom: 22px !important;
}

.page-about .inline-link {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 227, 200, 0.4);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 0 0 24px;
}

.page-about .about-figure .media {
  border: 1px solid var(--line);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--steel);
  letter-spacing: 0.02em;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(25, 227, 200, 0.12) 60%, transparent);
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 12px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 16px;
  width: 9px;
  height: 9px;
  background: var(--field);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 0.18s var(--ease);
}

.page-about .tl-item:hover::before {
  background: var(--cyan);
}

.page-about .tl-details {
  border: 1px solid var(--line);
  background: var(--field-2);
  transition: border-color 0.2s var(--ease);
}

.page-about .tl-details:hover,
.page-about .tl-details[open] {
  border-color: var(--line-strong);
}

.page-about .tl-details summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-code {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  border: 1px solid rgba(25, 227, 200, 0.34);
  padding: 2px 8px;
}

.page-about .tl-title {
  font-family: var(--font-editorial);
  font-size: 16px;
  color: var(--paper);
}

.page-about .tl-note {
  margin: 0;
  padding: 0 16px 16px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

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

.page-about .team-card {
  background: var(--paper);
  border: 1px solid rgba(11, 21, 18, 0.16);
  box-shadow: var(--shadow-1);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

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

.page-about .team-card summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .team-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--orange);
}

.page-about .team-card[open] summary::after {
  content: "–";
}

.page-about .team-num {
  font-size: 30px;
  line-height: 1;
  color: var(--orange);
}

.page-about .team-name {
  font-family: var(--font-editorial);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper-ink);
}

.page-about .team-card p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper-ink-soft);
}

/* ---------- 全宽对角带 ---------- */
.page-about .about-band {
  position: relative;
  margin-block: clamp(34px, 5vw, 68px);
  padding-block: clamp(34px, 5vw, 62px);
  border-block: 1px solid var(--line);
  background: linear-gradient(115deg, rgba(18, 58, 46, 0.95) 0%, rgba(7, 19, 15, 0.98) 46%, rgba(14, 31, 43, 0.95) 100%);
  overflow: hidden;
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: -30% -8% -30% auto;
  width: 48%;
  background: linear-gradient(120deg, rgba(25, 227, 200, 0.16), rgba(255, 122, 47, 0.1) 58%, transparent);
  transform: skewX(-16deg);
  pointer-events: none;
}

.page-about .about-section-line {
  position: absolute;
  inset: 0 0 auto 0;
  width: 100%;
  height: 72px;
  color: var(--line-strong);
  pointer-events: none;
}

.page-about .about-band-inner {
  position: relative;
}

.page-about .about-band-inner .eyebrow {
  margin: 0 0 18px;
}

.page-about .about-band-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-band-stats li {
  display: grid;
  gap: 6px;
  padding-left: 14px;
  border-left: 1px solid rgba(25, 227, 200, 0.32);
}

.page-about .band-num {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-band-stats li:nth-child(2) .band-num {
  color: var(--amber);
}

.page-about .about-band-stats li:nth-child(3) .band-num {
  color: var(--orange);
}

.page-about .band-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .band-note {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 生产流程 ---------- */
.page-about .flow-steps {
  counter-reset: fs;
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-steps li {
  position: relative;
  padding: 16px 18px 16px 66px;
  border: 1px solid var(--line);
  background: var(--field-2);
  transition: border-color 0.2s var(--ease);
}

.page-about .flow-steps li:hover {
  border-color: var(--cyan);
}

.page-about .flow-steps li::before {
  counter-increment: fs;
  content: counter(fs, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .flow-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-editorial);
  font-size: 16.5px;
  color: var(--paper);
}

.page-about .flow-steps p {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 公告专区（图文分栏） ---------- */
.page-about .about-section--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 31, 43, 0.76), rgba(7, 19, 15, 0.6));
}

.page-about .split-media .media {
  border: 1px solid var(--line);
  overflow: hidden;
}

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

/* ---------- 本地归属 ---------- */
.page-about .roots-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .roots-facts > div {
  display: grid;
  gap: 6px;
  padding: 15px 18px;
  background: var(--field-2);
}

.page-about .roots-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .roots-facts dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .roots-facts dd.mono {
  color: var(--cyan);
  font-size: 15px;
  letter-spacing: 0.04em;
}

/* ---------- 收尾 CTA ---------- */
.page-about .about-cta {
  border-top: 1px solid var(--line);
  padding-top: clamp(26px, 3.4vw, 44px);
}

.page-about .cta-card {
  padding: clamp(22px, 3.4vw, 40px);
  background: var(--paper);
  border: 1px solid rgba(11, 21, 18, 0.16);
  box-shadow: var(--shadow-2);
}

.page-about .cta-card .eyebrow {
  color: var(--orange);
  margin: 0 0 10px;
}

.page-about .cta-card h2 {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.28;
  color: var(--paper-ink);
}

.page-about .cta-card p {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-ink-soft);
}

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

.page-about .about-outline-link {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border: 1px solid rgba(11, 21, 18, 0.3);
  border-radius: 2px;
  font-size: 14px;
  color: var(--paper-ink);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-outline-link:hover,
.page-about .about-outline-link:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255, 122, 47, 0.06);
}

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

  .page-about .about-band-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

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

  .page-about .about-section--split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(20px, 3vw, 36px);
    align-items: center;
  }
}

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

  .page-about .about-rail-inner {
    position: sticky;
    top: 96px;
  }

  .page-about .rail-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .rail-list .rail-item {
    display: block;
    margin-bottom: 6px;
  }

  .page-about .rail-list a {
    border-color: transparent;
    border-left: 1px solid var(--line);
    background: transparent;
    padding: 7px 0 7px 14px;
    white-space: normal;
    transition: border-color 0.18s var(--ease), color 0.18s var(--ease), padding-left 0.18s var(--ease);
  }

  .page-about .rail-list a:hover,
  .page-about .rail-list a:focus-visible {
    border-left-color: var(--cyan);
    background: transparent;
    padding-left: 20px;
  }

  .page-about .about-hero {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --about-rail-w: 268px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card:hover {
    transform: none;
  }
}
</