.page-about {
  background: var(--night);
  color: var(--paper);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 40px;
  overflow: hidden;
  background:
    radial-gradient(760px 380px at 88% -20%, rgba(34, 224, 214, 0.20), transparent 62%),
    radial-gradient(560px 320px at 4% 110%, rgba(255, 107, 44, 0.14), transparent 64%),
    linear-gradient(155deg, #04101E 0%, #071A2F 55%, #0B2136 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -10%;
  width: 54%;
  height: 160%;
  background: linear-gradient(100deg, transparent 45%, rgba(184, 255, 249, 0.06) 51%, transparent 58%);
  transform: rotate(-10deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 6px 16px 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 214, 0.18);
}

.page-about .about-hero__title {
  margin: 22px 0 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-hero__mark {
  position: relative;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.08em;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}

.page-about .about-hero__intro {
  margin: 24px 0 0;
  max-width: 50em;
  font-size: 1rem;
  line-height: 1.9;
  color: #cfdde5;
}

.page-about .about-facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: 28px;
  padding-bottom: 64px;
}

.page-about .about-body {
  min-width: 0;
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--mist);
}

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

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--paper);
  background: rgba(34, 224, 214, 0.12);
  border-color: rgba(34, 224, 214, 0.4);
}

.page-about .about-toc__no {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--orange);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  position: relative;
  scroll-margin-top: 104px;
}

.page-about .about-section + .about-section {
  margin-top: 44px;
}

.page-about .about-section:not(.about-section--panel) + .about-section:not(.about-section--panel) {
  padding-top: 44px;
  border-top: 1px solid var(--line-soft);
}

.page-about .section-marker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 5px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .section-marker__num {
  color: var(--orange);
  font-weight: 700;
}

.page-about .about-section__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 4vw, 2.35rem);
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-section__lead {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 1rem;
  line-height: 1.85;
  color: #cfdde5;
}

.page-about .about-prose p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.9;
  color: #cfdde5;
}

.page-about .about-section--panel {
  padding: 30px 22px 34px;
  border-radius: var(--radius-lg);
}

.page-about .about-section--green {
  background: linear-gradient(155deg, #123A35 0%, #0D2A27 100%);
}

.page-about .about-section--indigo {
  background: linear-gradient(155deg, #241B4A 0%, #191139 100%);
}

.page-about .about-section--wine {
  background: linear-gradient(155deg, #5A1F2E 0%, #3D1521 100%);
}

/* ---------- 图文 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(34, 224, 214, 0.10), rgba(255, 107, 44, 0.08));
  border: 1px solid var(--line-soft);
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 生产线 ---------- */
.page-about .production-grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .production-team {
  padding: 20px 18px 22px;
  border-radius: 16px 6px 16px 6px;
  background: rgba(4, 16, 30, 0.4);
  border: 1px solid var(--line-soft);
}

.page-about .production-team:nth-child(2) {
  border-radius: 6px 16px 6px 16px;
}

.page-about .production-team__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .production-team__name {
  margin: 9px 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .production-team__desc {
  margin: 10px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: #c3d3dc;
}

.page-about .production-rhythm {
  margin-top: 16px;
  padding: 16px 18px;
  display: grid;
  gap: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(100deg, rgba(255, 107, 44, 0.16), rgba(34, 224, 214, 0.10));
}

.page-about .production-rhythm__item {
  display: grid;
  gap: 6px;
}

.page-about .production-rhythm__time {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--metal);
}

.page-about .production-rhythm__text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #cfdde5;
}

/* ---------- 收藏 ---------- */
.page-about .fav-grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .fav-card {
  padding: 20px 18px 22px;
  border-radius: 20px;
  background: rgba(7, 26, 47, 0.55);
  border: 1px solid var(--line);
}

.page-about .fav-card:nth-child(2) {
  border-radius: 6px 20px 20px 6px;
}

.page-about .fav-card:nth-child(3) {
  border-radius: 20px 20px 6px 20px;
}

.page-about .fav-card__tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--cyan);
}

.page-about .fav-card:nth-child(2) .fav-card__tag {
  background: var(--orange);
}

.page-about .fav-card:nth-child(3) .fav-card__tag {
  background: var(--metal);
}

.page-about .fav-card__title {
  margin: 12px 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .fav-card__desc {
  margin: 9px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: #c3d3dc;
}

.page-about .fav-note {
  margin: 20px 0 0;
  max-width: 58ch;
  padding-left: 14px;
  border-left: 3px solid var(--metal);
  font-size: 0.9375rem;
  line-height: 1.85;
  color: #cfdde5;
}

.page-about .fav-actions {
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .version-track {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .version-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(34, 224, 214, 0.08));
}

.page-about .version-item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .version-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--wine);
  border: 2px solid var(--cyan);
}

.page-about .version-item.is-current::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 44, 0.22);
}

.page-about .version-item__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--metal);
}

.page-about .version-item.is-current .version-item__year {
  color: var(--orange);
}

.page-about .version-item__title {
  margin: 8px 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .version-item__desc {
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 0.875rem;
  line-height: 1.8;
  color: #e2d3d7;
}

/* ---------- 天津看台 ---------- */
.page-about .tianjin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
}

.page-about .tianjin-copy p {
  margin: 0 0 16px;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.9;
  color: #cfdde5;
}

.page-about .tianjin-figure {
  margin: 0;
}

/* ---------- 质量巡检 ---------- */
.page-about .quality-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .quality-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 18px;
  border-radius: 12px;
  background: rgba(18, 58, 53, 0.4);
  border-left: 3px solid var(--cyan);
}

.page-about .quality-item__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .quality-item__text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #cfdde5;
}

/* ---------- 服务协作 ---------- */
.page-about .service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
}

.page-about .service-copy p {
  margin: 0 0 16px;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.9;
  color: #cfdde5;
}

.page-about .service-mail {
  font-size: 0.9375rem;
}

.page-about .service-mail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, 0.5);
}

.page-about .service-mail a:hover,
.page-about .service-mail a:focus-visible {
  color: var(--metal);
}

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

.page-about .service-link {
  display: grid;
  gap: 5px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(7, 26, 47, 0.55);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .service-link:hover,
.page-about .service-link:focus-visible {
  background: rgba(34, 224, 214, 0.10);
  border-color: rgba(34, 224, 214, 0.45);
  transform: translateX(3px);
}

.page-about .service-link__label {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .service-link__desc {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 回到顶部 ---------- */
.page-about .about-top-wrap {
  margin: 44px 0 0;
}

.page-about .about-top {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-top:hover,
.page-about .about-top:focus-visible {
  color: var(--metal);
  border-color: rgba(184, 255, 249, 0.5);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 60px 0 52px;
  }

  .page-about .about-hero__intro {
    font-size: 1.0625rem;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-section--panel {
    padding: 38px 34px 40px;
  }

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

  .page-about .production-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    padding: 20px 22px;
  }

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

  .page-about .tianjin-grid,
  .page-about .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
    align-items: start;
  }

  .page-about .quality-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .quality-item {
    display: grid;
    gap: 10px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 60px;
    padding-top: 44px;
    padding-bottom: 88px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    margin-bottom: 0;
    padding-left: 10px;
    border-left: 1px solid var(--line);
  }

  .page-about .about-toc__link {
    width: 100%;
    padding: 9px 12px;
    border-color: transparent;
    border-radius: 10px;
    font-size: 0.875rem;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    border-color: transparent;
  }

  .page-about .about-hero__title {
    max-width: 16em;
  }

  .page-about .version-track {
    padding-left: 30px;
  }

  .page-about .version-item::before {
    left: -30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .service-link,
  .page-about .about-top {
    transition: none;
  }

  .page-about .service-link:hover,
  .page-about .service-link:focus-visible {
    transform: none;
  }
}
<<<END>>>