.page-about {
  --about-hair: rgba(0, 229, 199, 0.24);
  --about-orange-tint: rgba(255, 90, 31, 0.14);
  --about-cyan-tint: rgba(0, 229, 199, 0.12);
  --about-ink: #12161a;
  --about-ink-soft: #3a4145;
  --about-ink-label: #7a6a56;
  background: var(--carbon-950);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about a:hover {
  color: var(--paper);
}

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

.page-about figure {
  margin: 0;
}

/* ---------- 首屏框景报头 ---------- */
.about-hero {
  padding: 14px 10px 4px;
  background:
    radial-gradient(90% 70% at 6% 0%, rgba(255, 90, 31, 0.2), transparent 62%),
    radial-gradient(80% 78% at 94% 6%, rgba(0, 229, 199, 0.16), transparent 64%);
}

.about-hero__frame {
  position: relative;
  max-width: var(--rail);
  margin: 0 auto;
  padding: 22px 16px 30px;
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-panel);
  background: linear-gradient(168deg, rgba(20, 24, 26, 0.96), rgba(7, 9, 10, 0.98));
  overflow: hidden;
}

.about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--cyan) 100%);
}

.about-hero__frame::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 199, 0.18), transparent 70%);
  pointer-events: none;
}

.about-scale {
  height: 12px;
  margin: -4px 0 12px;
  background-image: repeating-linear-gradient(90deg, var(--carbon-700) 0 1px, transparent 1px 16px);
  opacity: 0.9;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .breadcrumb__link {
  color: var(--paper-muted);
}

.page-about .breadcrumb__sep {
  color: var(--carbon-700);
}

.about-masthead {
  margin-top: 16px;
}

.about-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.about-masthead__meta span {
  position: relative;
  padding-right: 14px;
}

.about-masthead__meta span:last-child {
  padding-right: 0;
}

.about-masthead__meta span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--carbon-700);
  transform: translateY(-50%);
}

.about-masthead h1 {
  margin: 14px 0 14px;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 20ch;
  color: var(--paper);
}

.about-masthead__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-muted);
}

.about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.about-fact {
  border-left: 2px solid var(--orange);
  padding-left: 12px;
}

.about-fact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.about-fact__value {
  display: block;
  margin-top: 4px;
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.about-fact__unit {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--paper-muted);
}

.about-vnote {
  display: none;
}

/* ---------- 章节索引 ---------- */
.about-index {
  display: flex;
  gap: 8px;
  max-width: var(--shell);
  margin: 22px auto 0;
  padding: 0 12px 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.about-index__link {
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-pill);
  background: var(--carbon-900);
  color: var(--paper-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  transition: transform var(--mid) var(--ease), border-color var(--mid) var(--ease), color var(--mid) var(--ease);
}

.about-index__link:hover,
.about-index__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  color: var(--paper);
}

/* ---------- 章节通用 ---------- */
.about-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 34px 12px;
}

.page-about .section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 18px;
}

.page-about .section-head__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .section-head__title {
  margin: 0;
  font-size: clamp(23px, 4.6vw, 34px);
  line-height: 1.26;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.about-grid {
  display: grid;
  gap: 20px;
}

.about-grid__col {
  min-width: 0;
}

.about-copy {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-muted);
}

.about-copy:last-child {
  margin-bottom: 0;
}

.about-copy strong {
  color: var(--paper);
  font-weight: 600;
}

.about-copy--wide {
  max-width: 66ch;
}

.about-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--about-hair);
  font-size: 14px;
  color: var(--cyan);
}

.about-link:hover {
  border-bottom-color: var(--cyan);
}

.about-link--dark {
  color: #0f6f63;
  border-bottom-color: rgba(15, 111, 99, 0.4);
}

.about-link--dark:hover {
  color: #08453e;
}

/* ---------- 媒体 ---------- */
.about-media {
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-card);
  background: var(--carbon-800);
  overflow: hidden;
}

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

.about-media__caption {
  margin: 10px 2px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.about-figure--wide {
  margin-top: 20px;
}

/* ---------- 简介清单 ---------- */
.about-mini {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.about-mini li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--carbon-700);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-muted);
}

.about-mini li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.about-mini b {
  flex: 0 0 auto;
  min-width: 42px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

/* ---------- 面板 ---------- */
.about-panel {
  position: relative;
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-panel);
  background: var(--carbon-900);
  padding: 22px 16px 18px;
}

.about-panel--raised {
  background: var(--carbon-800);
}

.about-panel--paper {
  background: var(--paper);
  border-color: transparent;
  color: var(--about-ink);
}

.about-panel__tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.about-panel__tag--dark {
  color: var(--about-ink-label);
}

.about-panel--paper .about-copy {
  color: var(--about-ink-soft);
}

.about-svg {
  display: block;
  width: 100%;
  height: auto;
}

.about-caption {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--slate);
}

/* ---------- 三级校验 ---------- */
.about-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.about-steps li {
  position: relative;
  padding-left: 40px;
}

.about-steps li::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--about-hair), transparent);
}

.about-steps__idx {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  background: var(--carbon-950);
}

.about-steps__title {
  margin: 2px 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.about-steps__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-muted);
}

/* ---------- 团队分工卡 ---------- */
.about-roles {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.about-role {
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-card);
  background: var(--carbon-800);
  padding: 18px 16px;
  transition: transform var(--mid) var(--ease), border-color var(--mid) var(--ease);
}

.about-role:hover,
.about-role:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.about-role__num {
  display: block;
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.about-role__num span {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--paper-muted);
}

.about-role__name {
  margin: 10px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.about-role__more {
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--carbon-700);
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
  transition: opacity var(--mid) var(--ease);
}

.about-role:hover .about-role__more,
.about-role:focus-within .about-role__more {
  color: var(--paper-muted);
}

/* ---------- 覆盖数字 ---------- */
.about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0 4px;
}

.about-stat {
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-card);
  background: var(--carbon-900);
  padding: 16px 12px;
}

.about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--paper-muted);
}

.about-grid--loose {
  margin-top: 20px;
}

/* ---------- 时间轴 ---------- */
.about-timeline {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 24px;
  position: relative;
}

.about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--cyan));
}

.about-timeline__item {
  position: relative;
  margin-bottom: 14px;
}

.about-timeline__item:last-child {
  margin-bottom: 0;
}

.about-timeline__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--carbon-950);
  border: 2px solid var(--orange);
  box-shadow: 0 0 0 3px var(--carbon-950);
}

.about-timeline__item:hover::before,
.about-timeline__item:focus-within::before {
  border-color: var(--lime);
}

.about-timeline__card {
  border: 1px solid var(--carbon-700);
  border-radius: var(--radius-card);
  background: var(--carbon-800);
  padding: 16px;
  transition: transform var(--mid) var(--ease), border-color var(--mid) var(--ease);
}

.about-timeline__item:hover .about-timeline__card,
.about-timeline__item:focus-within .about-timeline__card {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.about-timeline__phase {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.about-timeline__title {
  margin: 8px 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.about-timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-muted);
}

.about-timeline__extra {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--carbon-700);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  transition: color var(--mid) var(--ease);
}

.about-timeline__item:hover .about-timeline__extra,
.about-timeline__item:focus-within .about-timeline__extra {
  color: var(--paper-muted);
}

/* ---------- 暖纸联络卡 ---------- */
.about-paper {
  position: relative;
  border-radius: var(--radius-panel);
  background: var(--paper);
  color: var(--about-ink);
  padding: 26px 18px 22px;
  overflow: hidden;
}

.about-paper::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--orange) 0 12px, var(--cyan) 12px 24px);
  opacity: 0.9;
}

.about-paper .section-head__index {
  color: #b83a08;
}

.about-paper .section-head__title {
  color: var(--about-ink);
}

.about-paper .about-copy {
  color: var(--about-ink-soft);
}

.about-contact-list {
  display: grid;
  gap: 12px;
  margin: 20px 0 22px;
}

.about-contact-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  border-left: 2px solid var(--orange);
  padding-left: 12px;
}

.about-contact-row__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--about-ink-label);
}

.about-contact-row__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--about-ink);
  word-break: break-word;
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid #c3b49c;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--about-ink);
  font-size: 14px;
  font-weight: 500;
  transition: transform var(--mid) var(--ease), border-color var(--mid) var(--ease), color var(--mid) var(--ease);
}

.about-btn:hover {
  transform: translateY(-2px);
  border-color: var(--about-ink);
  color: var(--about-ink);
}

.about-btn--primary {
  border-color: var(--orange);
  background: var(--orange);
  color: #0b0d0e;
  font-weight: 600;
}

.about-btn--primary:hover {
  border-color: #b83a08;
  background: #ff6f3d;
  color: #0b0d0e;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .about-hero {
    padding: 20px 20px 6px;
  }

  .about-hero__frame {
    padding: 30px 28px 38px;
  }

  .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .about-index {
    padding: 0 20px 6px;
  }

  .about-section {
    padding: 42px 20px;
  }

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

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

  .about-paper {
    padding: 32px 26px 28px;
  }

  .about-contact-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .about-grid--split {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
    gap: 28px;
  }

  .about-grid--split.about-grid--loose {
    grid-template-columns: 1fr 1fr;
  }

  .about-vnote {
    display: block;
    position: absolute;
    right: 12px;
    top: 140px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--slate);
    opacity: 0.7;
  }

  .about-hero__frame {
    padding-right: 54px;
  }

  .about-timeline {
    padding-left: 30px;
  }

  .about-timeline__item::before {
    left: -29px;
  }
}

@media (min-width: 960px) and (hover: hover) {
  .about-role__more,
  .about-timeline__extra {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    margin-top: 0;
    border-top-color: transparent;
    overflow: hidden;
    transition: max-height var(--slow) var(--ease), opacity var(--mid) var(--ease), padding-top var(--mid) var(--ease);
  }

  .about-role:hover .about-role__more,
  .about-role:focus-within .about-role__more {
    max-height: 180px;
    opacity: 1;
    padding-top: 10px;
    border-top-color: var(--carbon-700);
  }

  .about-timeline__item:hover .about-timeline__extra,
  .about-timeline__item:focus-within .about-timeline__extra {
    max-height: 180px;
    opacity: 1;
    padding-top: 10px;
    margin-top: 10px;
    border-top-color: var(--carbon-700);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 1ms !important;
  }

  .page-about .about-index__link:hover,
  .page-about .about-role:hover,
  .page-about .about-timeline__item:hover .about-timeline__card,
  .page-about .about-btn:hover {
    transform: none;
  }
}
<<<PAGE_CSS_DONE>>>