.page-about {
  --about-narrow: 820px;
  background: var(--doc);
  color: var(--slate);
}

.page-about .about-breadcrumb {
  padding-top: 18px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 4px 0 42px;
  background: var(--surface);
  border-bottom: 3px solid var(--navy);
}

.page-about .about-hero::after {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 3px;
  width: 22%;
  max-width: 320px;
  background: var(--orange);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 28px;
  padding-top: 22px;
  padding-bottom: 8px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--navy);
  margin: 12px 0 16px;
}

.page-about .about-hero .lede {
  max-width: 46ch;
  color: var(--slate);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  clip-path: polygon(0 3%, 100% 0, 100% 100%, 0 96%);
}

.page-about .about-hero__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: end;
    gap: 56px;
    padding-top: 34px;
  }
  .page-about .about-hero {
    padding-bottom: 56px;
  }
}

/* ---------- 章节通用节奏 ---------- */
.page-about section {
  padding: 44px 0;
}

@media (min-width: 900px) {
  .page-about section {
    padding: 64px 0;
  }
}

.page-about .section-head {
  margin-bottom: 26px;
}

.page-about .about-narrow {
  max-width: 980px;
}

/* ---------- 01 起点 ---------- */
.page-about .about-prose-grid {
  display: grid;
  gap: 26px;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 66ch;
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-margin {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-margin__item {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--teal);
  border-left: 3px solid var(--teal);
  padding: 2px 0 2px 10px;
}

@media (min-width: 900px) {
  .page-about .about-prose-grid {
    grid-template-columns: minmax(0, 1fr) 210px;
    gap: 50px;
  }
}

/* ---------- 02 四类现场 ---------- */
.page-about .about-venues {
  background: var(--doc);
}

.page-about .venue-bands {
  display: grid;
  gap: 1px;
  background: var(--paper);
  border-top: 1px solid var(--paper);
  border-bottom: 1px solid var(--paper);
  margin-top: 8px;
}

.page-about .venue-band {
  background: var(--surface);
  padding: 22px 20px 26px;
  border-top: 5px solid var(--mist);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background var(--ease), border-color var(--ease);
}

.page-about .venue-band--a { border-top-color: var(--navy); }
.page-about .venue-band--b { border-top-color: var(--orange); }
.page-about .venue-band--c { border-top-color: var(--teal); }
.page-about .venue-band--d { border-top-color: var(--console); }

.page-about .venue-band__no {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .venue-band__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  letter-spacing: 0.01em;
  color: var(--navy);
}

.page-about .venue-band__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .venue-band__tags {
  margin: auto 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 6px;
}

@media (hover: hover) {
  .page-about .venue-band:hover {
    background: #ffffff;
  }
}

@media (min-width: 820px) {
  .page-about .venue-bands {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 03 时间线 ---------- */
.page-about .about-timeline {
  background: var(--navy);
  color: var(--paper);
}

.page-about .about-timeline .section-head__title {
  color: #ffffff;
}

.page-about .about-timeline .section-head__num {
  color: var(--orange);
}

.page-about .about-timeline .section-head__note {
  color: var(--mist);
}

.page-about .tl {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: rgba(169, 186, 201, 0.32);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 30px 34px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--navy);
  border: 3px solid var(--orange);
  box-sizing: content-box;
  transition: background var(--ease);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5.6vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.page-about .tl__year--long {
  font-size: clamp(20px, 4vw, 28px);
  letter-spacing: -0.01em;
}

.page-about .tl__title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--orange-soft);
}

.page-about .tl__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.84);
}

.page-about .tl__tags {
  margin: 12px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

@media (hover: hover) {
  .page-about .tl__item:hover::before {
    background: var(--orange);
  }
  .page-about .tl__item:hover .tl__title {
    color: #ffffff;
  }
}

@media (min-width: 760px) {
  .page-about .tl::before {
    left: 9px;
  }
  .page-about .tl__item {
    padding: 0 0 36px 48px;
  }
  .page-about .tl__item::before {
    left: 4px;
  }
}

/* ---------- 04 交付团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-team__copy > p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.page-about .about-stat {
  background: var(--surface);
  border: 1px solid var(--paper);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--navy);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-steps {
  list-style: none;
  counter-reset: step;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-steps li {
  counter-increment: step;
  position: relative;
  padding: 12px 18px 12px 50px;
  background: var(--surface);
  border: 1px solid var(--paper);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--navy);
  transition: border-color var(--ease);
}

.page-about .about-steps li strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-steps li span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  font-weight: 400;
  color: var(--slate);
}

.page-about .about-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.04em;
}

@media (hover: hover) {
  .page-about .about-steps li:hover {
    border-color: var(--navy);
  }
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 05 服务网络 ---------- */
.page-about .about-network {
  background: var(--surface);
  border-top: 1px solid var(--paper);
  border-bottom: 1px solid var(--paper);
}

.page-about .about-network__lead {
  max-width: 68ch;
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .net__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.page-about .net__legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .net__dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--mist);
}

.page-about .net__dot--navy { background: var(--navy); }
.page-about .net__dot--teal { background: var(--teal); }
.page-about .net__dot--orange { background: var(--orange); }

.page-about .net__nodes {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .net__node {
  background: #ffffff;
  border: 1px solid var(--paper);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: grid;
  gap: 6px;
  align-content: start;
  transition: border-color var(--ease);
}

.page-about .net__node strong {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--navy);
}

.page-about .net__node span {
  font-size: 14px;
  line-height: 1.72;
  color: var(--slate);
}

@media (hover: hover) {
  .page-about .net__node:hover {
    border-color: var(--teal);
  }
}

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

.page-about .about-network__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .about-network__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-about .net__nodes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .net__nodes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 06 上线支持 ---------- */
.page-about .about-support__grid {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.page-about .support-item {
  border: 1px solid var(--paper);
  border-left: 4px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--surface);
  padding: 18px 20px 20px;
}

.page-about .support-item__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .support-item h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--navy);
}

.page-about .support-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
}

.page-about .about-support__foot {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-support__foot a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 820px) {
  .page-about .about-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background: var(--ink);
  color: var(--doc);
  border-top: 4px solid var(--orange);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.18;
  color: #ffffff;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist);
}

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

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 12px 48px;
  }
  .page-about .about-cta h2 {
    grid-column: 1 / -1;
  }
  .page-about .about-cta p {
    grid-column: 1;
  }
  .page-about .about-cta__actions {
    grid-column: 2;
    justify-content: flex-end;
  }
}
<<<END>>>