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

.page-about {
  --about-page-max: var(--cc-w);
  background: var(--cc-cream);
}

/* 面包屑 */
.page-about .page-about__breadcrumb {
  max-width: var(--about-page-max);
  margin: 0 auto;
  padding: 20px 20px 0;
  font-size: 0.875rem;
  font-family: var(--cc-font-body);
  color: var(--cc-shale);
  display: flex;
  gap: 10px;
}

.page-about .page-about__breadcrumb a {
  color: var(--cc-brick);
  text-decoration: none;
  font-weight: 500;
}

.page-about .page-about__breadcrumb a:hover {
  text-decoration: underline;
}

/* 编号元素 */
.page-about .about-section-index {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--cc-font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--cc-brick);
  margin: 0 0 8px;
}

.page-about .about-section-index::after {
  content: "";
  width: 48px;
  height: 2px;
  background: currentColor;
  flex-shrink: 0;
}

.page-about .about-section-index--light {
  color: var(--cc-gold);
}

/* Hero */
.page-about .about-hero {
  background: var(--cc-ink);
  color: var(--cc-white);
  position: relative;
  overflow: hidden;
  padding-top: 48px;
  border-bottom: var(--cc-line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--cc-brick) 0 72%, var(--cc-gold) 72% 100%);
}

.page-about .about-hero__inner {
  max-width: var(--about-page-max);
  margin: 0 auto;
  padding: 24px 20px 0;
  display: grid;
  gap: 32px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-hero__edition {
  font-family: var(--cc-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cc-gold);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  font-family: var(--cc-font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 5.4vw, 2.9rem);
  line-height: 1.22;
  margin: 0 0 18px;
  max-width: 16em;
  text-shadow: 3px 3px 0 rgba(193, 39, 45, 0.4);
}

.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.85);
  max-width: 60ch;
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 4px solid var(--cc-gold);
  border-left: 4px solid var(--cc-gold);
  margin: 0;
}

.page-about .about-hero__stat {
  margin: 0;
  padding: 18px 14px;
  border-right: 4px solid var(--cc-gold);
  border-bottom: 4px solid var(--cc-gold);
  background: rgba(0, 0, 0, 0.32);
}

.page-about .about-hero__stat dt {
  font-family: var(--cc-font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cc-gold);
  margin: 0 0 8px;
}

.page-about .about-hero__stat dd {
  font-family: var(--cc-font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  color: var(--cc-white);
  margin: 0;
  line-height: 1;
}

.page-about .about-hero__ruler {
  height: 10px;
  margin: 8px 0 0;
  background-image: repeating-linear-gradient(90deg, var(--cc-gold) 0 2px, transparent 2px 24px);
  opacity: 0.45;
  grid-column: 1 / -1;
}

/* 起源与初心 */
.page-about .about-origin {
  background: var(--cc-cream);
  padding: 64px 20px;
}

.page-about .about-origin__grid {
  max-width: var(--about-page-max);
  margin: 0 auto;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-origin h2 {
  font-family: var(--cc-font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.25;
  color: var(--cc-ink);
  margin: 4px 0 20px;
}

.page-about .about-origin__lead {
  font-family: var(--cc-font-head);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--cc-shale);
  border-left: 4px solid var(--cc-brick);
  padding-left: 16px;
  margin: 0 0 24px;
}

.page-about .about-origin__content p {
  color: var(--cc-shale);
  line-height: 1.9;
  margin: 0;
}

.page-about .about-origin__content p + p {
  margin-top: 16px;
}

.page-about .about-origin__note {
  margin-top: 28px;
  background: var(--cc-ink);
  border-left: 8px solid var(--cc-brick);
  padding: 20px 20px 16px;
  color: var(--cc-cream);
  box-shadow: var(--cc-shadow-soft);
}

.page-about .about-origin__note-mark {
  font-family: var(--cc-font-head);
  font-size: 2.2rem;
  line-height: 1;
  color: var(--cc-gold);
}

.page-about .about-origin__note p {
  font-family: var(--cc-font-head);
  font-size: 1.1rem;
  color: var(--cc-white);
  margin: 6px 0 0;
  line-height: 1.6;
}

.page-about .about-origin__media {
  margin: 0;
  position: relative;
  border: 4px solid var(--cc-black);
  box-shadow: var(--cc-shadow);
  background: var(--cc-mist);
}

.page-about .about-origin__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: grayscale(0.3) contrast(1.05);
}

.page-about .about-origin__media figcaption {
  background: var(--cc-ink);
  color: var(--cc-cream);
  font-family: var(--cc-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  padding: 10px 12px;
  line-height: 1.5;
}

/* 关键里程碑 */
.page-about .about-journey {
  background: var(--cc-ink);
  color: var(--cc-cream);
  position: relative;
  overflow: hidden;
  padding: 72px 20px 96px;
  border-top: 4px solid var(--cc-brick);
  border-bottom: var(--cc-line);
}

.page-about .about-journey__wall {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 1600px;
  max-width: none;
  height: auto;
  color: var(--cc-gold);
  pointer-events: none;
}

.page-about .about-journey__inner {
  max-width: var(--about-page-max);
  margin: 0 auto;
  position: relative;
}

.page-about .about-journey__head {
  margin-bottom: 48px;
  max-width: 42ch;
}

.page-about .about-journey__head h2 {
  color: var(--cc-white);
  font-family: var(--cc-font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.25;
  margin: 4px 0 16px;
}

.page-about .about-journey__head p {
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin: 0;
}

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

.page-about .about-journey__timeline::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 20px;
  bottom: 20px;
  width: 2px;
  background: var(--cc-gold);
  opacity: 0.5;
}

.page-about .about-journey__item {
  position: relative;
  padding-left: 70px;
  padding-bottom: 48px;
}

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

.page-about .about-journey__marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 56px;
  border: 3px solid var(--cc-gold);
  background: var(--cc-ink);
  box-shadow: 0 0 0 4px var(--cc-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-journey__item:hover .about-journey__marker {
  background: var(--cc-brick);
  border-color: var(--cc-gold);
}

.page-about .about-journey__year {
  font-family: var(--cc-font-head);
  font-weight: 900;
  font-size: 0.8125rem;
  color: var(--cc-gold);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.page-about .about-journey__item:hover .about-journey__year {
  color: var(--cc-white);
}

.page-about .about-journey__card {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
  padding: 20px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-journey__item:hover .about-journey__card {
  border-color: var(--cc-brick);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .about-journey__card h3 {
  font-family: var(--cc-font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--cc-white);
  margin: 0 0 8px;
}

.page-about .about-journey__card p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

/* 技术理念 */
.page-about .about-philosophy {
  background: var(--cc-cream);
  padding: 64px 20px;
}

.page-about .about-philosophy__layout {
  max-width: var(--about-page-max);
  margin: 0 auto;
  display: grid;
  gap: 40px;
}

.page-about .about-philosophy__intro h2 {
  font-family: var(--cc-font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  color: var(--cc-ink);
  line-height: 1.25;
  margin: 4px 0 16px;
}

.page-about .about-philosophy__intro p:last-child {
  color: var(--cc-shale);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-philosophy__media {
  margin: 32px 0 0;
  border: 4px solid var(--cc-black);
  box-shadow: var(--cc-shadow);
  background: var(--cc-mist);
}

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

.page-about .about-philosophy__media figcaption {
  background: var(--cc-ink);
  color: var(--cc-cream);
  font-family: var(--cc-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  padding: 10px 12px;
  line-height: 1.5;
}

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

.page-about .about-principle {
  background: var(--cc-white);
  border: 4px solid var(--cc-black);
  border-left: 8px solid var(--cc-brick);
  box-shadow: var(--cc-shadow-soft);
  padding: 24px;
  position: relative;
  transition: transform 0.2s ease;
}

.page-about .about-principle:hover {
  transform: translate(-2px, -2px);
}

.page-about .about-principle__num {
  font-family: var(--cc-font-data);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cc-brick);
  letter-spacing: 0.12em;
}

.page-about .about-principle h3 {
  font-family: var(--cc-font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cc-ink);
  margin: 12px 0 12px;
}

.page-about .about-principle p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--cc-shale);
  margin: 0;
}

.page-about .about-principle__fact {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-top: 16px;
  border-top: 2px dashed var(--cc-mist);
  padding-top: 12px;
  font-size: 0.8125rem;
}

.page-about .about-principle__fact span {
  font-family: var(--cc-font-data);
  font-weight: 600;
  color: var(--cc-brick);
}

/* 资质与荣誉 */
.page-about .about-honors {
  background: var(--cc-ink);
  color: var(--cc-cream);
  padding: 72px 20px;
  border-top: 4px solid var(--cc-gold);
}

.page-about .about-honors__grid {
  max-width: var(--about-page-max);
  margin: 0 auto;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-honors__text h2 {
  color: var(--cc-white);
  font-family: var(--cc-font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.25;
  margin: 4px 0 16px;
}

.page-about .about-honors__text > p:last-of-type {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.85;
  margin: 0 0 32px;
}

.page-about .about-honors__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-honor {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-honor:hover {
  border-color: var(--cc-gold);
  transform: translateX(4px);
}

.page-about .about-honor__badge {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--cc-gold);
  background: var(--cc-brick);
  color: var(--cc-white);
  font-family: var(--cc-font-head);
  font-weight: 900;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.page-about .about-honor__info h3 {
  font-family: var(--cc-font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cc-white);
  margin: 0 0 6px;
}

.page-about .about-honor__info p {
  font-family: var(--cc-font-data);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.66);
  margin: 0;
  line-height: 1.5;
}

.page-about .about-honors__media {
  margin: 0;
  border: 4px solid var(--cc-gold);
  box-shadow: 8px 8px 0 rgba(212, 160, 23, 0.28);
  background: var(--cc-mist);
}

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

.page-about .about-honors__media figcaption {
  font-family: var(--cc-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.62);
  padding: 12px 4px 0;
  line-height: 1.5;
}

/* 继续了解 */
.page-about .about-links {
  background: var(--cc-cream);
  border-top: var(--cc-line);
  padding: 64px 20px;
}

.page-about .about-links__inner {
  max-width: var(--about-page-max);
  margin: 0 auto;
}

.page-about .about-links h2 {
  font-family: var(--cc-font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--cc-ink);
  margin: 0 0 12px;
}

.page-about .about-links p {
  color: var(--cc-shale);
  line-height: 1.8;
  margin: 0 0 32px;
}

.page-about .about-links__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* 桌面端布局 */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 64px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 1.35fr 1fr;
    align-items: end;
    gap: 48px;
    padding-top: 40px;
  }

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

  .page-about .about-hero__stats {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-hero__ruler {
    margin-top: 24px;
  }

  .page-about .about-origin {
    padding: 96px 40px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .page-about .about-journey {
    padding: 96px 40px 120px;
  }

  .page-about .about-journey__head {
    margin-bottom: 72px;
  }

  .page-about .about-journey__timeline {
    display: flex;
    gap: 24px;
  }

  .page-about .about-journey__timeline::before {
    left: 0;
    right: 0;
    top: 28px;
    bottom: auto;
    width: auto;
    height: 2px;
  }

  .page-about .about-journey__item {
    flex: 1;
    padding-left: 0;
    padding-bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .page-about .about-journey__marker {
    position: relative;
    left: auto;
    top: auto;
    margin-bottom: 24px;
    z-index: 1;
  }

  .page-about .about-journey__card {
    width: 100%;
    height: 100%;
  }

  .page-about .about-philosophy {
    padding: 96px 40px;
  }

  .page-about .about-philosophy__layout {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .page-about .about-philosophy__side {
    max-width: 640px;
  }

  .page-about .about-philosophy__list {
    gap: 24px;
  }

  .page-about .about-honors {
    padding: 96px 40px;
  }

  .page-about .about-honors__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
  }

  .page-about .about-honors__media {
    max-width: 420px;
    justify-self: end;
  }

  .page-about .about-links {
    padding: 80px 40px;
  }
}