.page-about {
  --about-rule-line: 1px solid rgba(255, 255, 255, 0.12);
  --about-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
}

/* ===== Hero 刊头区 ===== */
.page-about__hero {
  background: var(--c-black);
  color: var(--c-white);
  padding: 3rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}
.page-about__hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32%;
  height: 72%;
  background: linear-gradient(150deg, rgba(0, 102, 204, 0.45) 0%, rgba(0, 174, 239, 0.12) 62%, transparent 100%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.page-about__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--c-red) 0%, var(--c-red) 58%, var(--c-gold) 58%, var(--c-gold) 100%);
}
.page-about__hero-inner {
  position: relative;
}
.page-about__breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 2.2rem;
  padding: 0 0 0.75rem;
  border-bottom: var(--about-rule-line);
  font-size: 0.85rem;
  color: var(--c-muted);
}
.page-about__breadcrumbs a {
  color: var(--c-mist);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about__breadcrumbs a:hover {
  color: var(--c-gold);
}
.page-about__breadcrumbs [aria-current="page"] {
  color: var(--c-gold);
}
.page-about__hero-copy {
  max-width: 720px;
}
.page-about__hero-copy .tag {
  margin-bottom: 1.2rem;
}
.page-about__hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 5.8vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: 0.02em;
  margin: 1rem 0 1.3rem;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
}
.page-about__hero-lead {
  border-left: 4px solid var(--c-gold);
  padding-left: 1.25rem;
  margin-top: 0.25rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-mist);
  max-width: 640px;
}

/* ===== 章节编号标签 ===== */
.page-about__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-red);
  border: 1px solid var(--c-red);
  padding: 0.3rem 0.65rem;
  margin-bottom: 1rem;
  background: rgba(200, 16, 46, 0.05);
}
.page-about__kicker--light {
  color: var(--c-gold);
  border-color: var(--c-gold);
  background: rgba(212, 175, 55, 0.06);
}

/* ===== 品牌故事 ===== */
.page-about__story {
  padding: 4rem 0;
}
.page-about__story-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}
.page-about__story-copy h2,
.page-about__milestones h2,
.page-about__data h2,
.page-about__team h2,
.page-about__explore h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.2;
  margin: 0 0 0.8rem;
}
.page-about__story-copy p,
.page-about__data-head p,
.page-about__team-lead,
.page-about__explore-card p {
  color: var(--c-graphite);
  line-height: 1.85;
}
.page-about__story-copy p + p {
  margin-top: 1.1rem;
}
.page-about__story-copy .button {
  margin-top: 1.5rem;
}
.page-about__story-media {
  overflow: hidden;
  border: 1px solid var(--c-rule);
  margin: 0;
  box-shadow: 12px 12px 0 rgba(200, 16, 46, 0.14);
  position: relative;
}
.page-about__story-media img,
.page-about__data-media img,
.page-about__team-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  max-width: 100%;
}
.page-about__story-caption,
.page-about__data-caption,
.page-about__team-caption {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.82rem;
  color: var(--c-muted);
  background: var(--c-white);
  border-top: 1px solid var(--c-rule);
  line-height: 1.6;
}

/* ===== 发展里程碑 ===== */
.page-about__milestones {
  background: var(--c-black);
  color: var(--c-white);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}
.page-about__milestones::after {
  content: "";
  position: absolute;
  top: 90px;
  right: -130px;
  width: 280px;
  height: 280px;
  border: 2px solid rgba(212, 175, 55, 0.28);
  border-radius: 50%;
  pointer-events: none;
}
.page-about__milestones h2 {
  color: var(--c-white);
}
.page-about__milestones-lead {
  color: var(--c-mist);
  max-width: 720px;
  margin: 0 0 2.8rem;
  line-height: 1.75;
}
.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 24px;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-red) 0%, var(--c-gold) 100%);
  opacity: 0.7;
}
.page-about__timeline-item {
  position: relative;
  padding: 0 0 1.75rem 68px;
}
.page-about__timeline-item::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 16px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-black);
  border: 4px solid var(--c-red);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.18);
}
.page-about__timeline-item:last-child {
  padding-bottom: 0;
}
.page-about__timeline-card {
  background: var(--c-carbon);
  border: 1px solid var(--c-rule);
  border-left: 4px solid var(--c-red);
  padding: 1rem 1.2rem 1.1rem;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.page-about__timeline-card:hover,
.page-about__timeline-card:focus-within {
  border-left-color: var(--c-gold);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.page-about__timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--c-gold);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.25rem;
}
.page-about__timeline-card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--c-white);
}
.page-about__timeline-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ===== 数据与规模 ===== */
.page-about__data {
  padding: 4rem 0;
}
.page-about__data h2 {
  margin-bottom: 1.8rem;
}
.page-about__data-panel {
  background: linear-gradient(150deg, var(--c-black) 0%, var(--c-carbon) 100%);
  border: 1px solid var(--c-rule);
  padding: 2rem 1.5rem;
  color: var(--c-white);
  position: relative;
}
.page-about__data-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 120px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-red) 0%, var(--c-gold) 100%);
}
.page-about__data-head h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--c-white);
}
.page-about__data-head p {
  margin: 0 0 2rem;
  color: rgba(255, 255, 255, 0.68);
  max-width: 680px;
  line-height: 1.7;
  font-size: 0.95rem;
}
.page-about__stats {
  list-style: none;
  margin: 0 0 2.4rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 1rem;
}
.page-about__stat {
  border-top: 1px solid var(--c-rule);
  padding-top: 0.85rem;
}
.page-about__stat dt {
  margin-bottom: 0.3rem;
  font-size: 0.78rem;
  color: var(--c-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.page-about__stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.1;
}
.page-about__stat-num {
  color: inherit;
}
.page-about__data-lower {
  display: grid;
  gap: 2rem;
}
.page-about__data-media {
  overflow: hidden;
  border: 1px solid var(--c-rule);
  margin: 0;
  align-self: start;
}
.page-about__data-bars {
  display: grid;
  gap: 1.5rem;
  align-content: center;
}
.page-about__data-bar {
  transition: opacity 0.2s;
}
.page-about__data-bar:hover {
  opacity: 0.92;
}
.page-about__data-bar-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}
.page-about__data-bar-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.page-about__data-bar-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--c-white);
  text-align: right;
}
.page-about__data-bar-track {
  display: block;
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.page-about__data-bar-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--c-blue) 0%, var(--c-sky) 100%);
  transition: filter 0.2s;
}
.page-about__data-bar:hover .page-about__data-bar-fill {
  filter: brightness(1.18);
}
.page-about__data-bar-fill--wide {
  width: 94%;
}
.page-about__data-bar-fill--mid {
  width: 68%;
}
.page-about__data-bar-fill--base {
  width: 46%;
}

/* ===== 团队与理念 ===== */
.page-about__team {
  background: var(--c-black);
  color: var(--c-white);
  padding: 4.5rem 0;
  position: relative;
}
.page-about__team h2 {
  color: var(--c-white);
}
.page-about__team-lead {
  color: var(--c-mist);
  max-width: 720px;
  margin: 0 0 2.5rem;
  line-height: 1.75;
}
.page-about__team-grid {
  display: grid;
  gap: 1.5rem;
  padding-bottom: 2rem;
}
.page-about__team-card {
  background: var(--c-carbon);
  border: 1px solid var(--c-rule);
  padding: 1.6rem 1.4rem 2rem;
  position: relative;
  transition: box-shadow 0.2s, transform 0.2s;
}
.page-about__team-card--red {
  border-top: 6px solid var(--c-red);
}
.page-about__team-card--gold {
  border-top: 6px solid var(--c-gold);
}
.page-about__team-card--blue {
  border-top: 6px solid var(--c-blue);
}
.page-about__team-card:hover {
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.3);
  transform: translateY(-3px);
}
.page-about__team-card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--c-white);
}
.page-about__team-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.75;
}
.page-about__team-index {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--c-gold);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  margin-bottom: 0.8rem;
}
.page-about__team-media {
  overflow: hidden;
  border: 1px solid var(--c-rule);
  margin: 0 0 2rem;
}
.page-about__team-statement {
  border: 1px solid rgba(212, 175, 55, 0.55);
  background: rgba(212, 175, 55, 0.05);
  padding: 1.5rem;
  margin-top: 2rem;
  border-left: 4px solid var(--c-gold);
}
.page-about__team-statement p {
  margin: 0;
  color: var(--c-mist);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* ===== 延伸入口 ===== */
.page-about__explore {
  padding: 4rem 0;
}
.page-about__explore-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.2rem;
}
.page-about__explore-card {
  background: var(--c-white);
  border: 1px solid var(--c-rule);
  border-bottom: 4px solid var(--c-red);
  padding: 1.7rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--c-black);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}
.page-about__explore-card:hover {
  box-shadow: var(--about-shadow);
  transform: translateY(-4px);
  border-bottom-color: var(--c-gold);
}
.page-about__explore-num {
  font-family: var(--font-mono);
  color: var(--c-red);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}
.page-about__explore-card h3 {
  font-family: var(--font-display);
  margin: 0;
  font-size: 1.3rem;
}
.page-about__explore-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0;
}
.page-about__explore-more {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-blue);
}

/* ===== 响应式增强 ===== */
@media (min-width: 640px) {
  .page-about__hero {
    padding: 4rem 0 5.5rem;
  }
  .page-about__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.8rem 1.5rem;
  }
  .page-about__data-lower {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
  }
  .page-about__explore-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about__story {
    padding: 5rem 0;
  }
  .page-about__story-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
  }
  .page-about__milestones,
  .page-about__data,
  .page-about__explore {
    padding: 5rem 0;
  }
  .page-about__team {
    padding: 5.5rem 0;
  }
  .page-about__team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    padding-bottom: 3rem;
  }
  .page-about__team-card:nth-child(2) {
    transform: translateY(28px);
  }
  .page-about__team-card:nth-child(3) {
    transform: translateY(56px);
  }
  .page-about__team-card:nth-child(2):hover {
    transform: translateY(25px);
  }
  .page-about__team-card:nth-child(3):hover {
    transform: translateY(53px);
  }
  .page-about__timeline {
    padding-left: 2rem;
  }
  .page-about__timeline::before {
    left: 55px;
  }
  .page-about__timeline-item {
    padding: 0 0 2rem 115px;
  }
  .page-about__timeline-item::before {
    left: 47px;
    width: 20px;
    height: 20px;
  }
  .page-about__timeline-card {
    max-width: 760px;
    padding: 1.1rem 1.5rem 1.2rem;
  }
  .page-about__timeline-year {
    font-size: 2rem;
  }
}

@media (min-width: 1200px) {
  .page-about__data-lower {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 3rem;
  }
  .page-about__explore-card {
    padding: 2rem 1.8rem;
  }
}