@keyframes aboutPulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 107, 0, 0.5); }
  70%  { box-shadow: 0 0 0 14px rgba(255, 107, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 107, 0, 0); }
}

.page-about {
  --about-glow: rgba(198, 255, 0, 0.35);
  background: var(--clr-bg);
  overflow-x: hidden;
}

/* ===== Hero 品牌宣言 ===== */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-offset) + 3rem);
  padding-bottom: 3.5rem;
  background-image:
    linear-gradient(rgba(198, 255, 0, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 255, 0, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: -18%;
  width: 70%;
  height: 100%;
  background: linear-gradient(135deg, transparent 42%, rgba(198, 255, 0, 0.07) 42.4%, rgba(198, 255, 0, 0.07) 43.2%, transparent 43.6%, transparent 68%, rgba(255, 107, 0, 0.05) 68.5%, transparent 69%);
  pointer-events: none;
}

.page-about .breadcrumb {
  margin-bottom: 3rem;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 2.5rem;
  align-items: end;
}

.page-about .about-hero__copy {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 1.1;
  margin: 0 0 1.4rem;
  color: var(--clr-text);
  letter-spacing: 0.01em;
}

.page-about .about-hero h1 strong {
  display: inline-block;
  position: relative;
  color: var(--clr-primary);
  z-index: 0;
}

.page-about .about-hero h1 strong::after {
  content: '';
  position: absolute;
  left: -0.08em;
  right: -0.08em;
  bottom: 0.08em;
  height: 0.22em;
  background: rgba(198, 255, 0, 0.16);
  transform: skewX(-16deg);
  z-index: -1;
}

.page-about .about-hero__lead {
  margin: 0 0 1.8rem;
  color: var(--clr-muted);
  font-size: 0.98rem;
  line-height: 1.9;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.page-about .about-hero__panel {
  position: relative;
  background: rgba(17, 21, 26, 0.82);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
}

.page-about .about-hero__stat {
  padding: 0.9rem 0.6rem;
  text-align: center;
  border-right: 1px solid var(--clr-border);
}

.page-about .about-hero__stat:last-child {
  border-right: 0;
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-numeric);
  font-size: 1.4rem;
  font-weight: 500;
  line-height: 1.2;
  color: var(--clr-primary);
}

.page-about .about-hero__stat:last-child .about-hero__stat-num {
  color: var(--clr-accent);
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--clr-muted);
}

.page-about .about-hero__note {
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--clr-border);
  font-family: var(--font-numeric);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
  text-transform: uppercase;
}

/* ===== 数据编年史时间轴 ===== */
.page-about .chrono-track {
  position: relative;
  margin-top: 2.6rem;
}

.page-about .chrono-item {
  display: grid;
  grid-template-columns: 56px 18px 1fr;
  column-gap: 12px;
  position: relative;
  margin-bottom: 1.5rem;
}

.page-about .chrono-item::before {
  content: '';
  position: absolute;
  left: 76px;
  top: 44px;
  bottom: -1.5rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(198, 255, 0, 0.45), rgba(42, 42, 42, 0.4));
}

.page-about .chrono-item:last-child::before {
  display: none;
}

.page-about .chrono-item__num {
  text-align: right;
  padding-top: 22px;
  font-family: var(--font-numeric);
  font-size: 0.84rem;
  color: var(--clr-primary);
  white-space: nowrap;
}

.page-about .chrono-item__mark {
  width: 12px;
  height: 12px;
  margin: 24px auto 0;
  border-radius: 50%;
  background: var(--clr-primary);
  box-shadow: 0 0 16px var(--about-glow);
}

.page-about .chrono-item__card {
  background: rgba(17, 21, 26, 0.74);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.28s var(--ease-out), border-color 0.28s;
}

.page-about .chrono-item__card:hover {
  transform: translateY(-3px);
  border-color: rgba(198, 255, 0, 0.55);
}

.page-about .chrono-item__card .chip {
  margin-bottom: 0.5rem;
}

.page-about .chrono-item__card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin: 0.3rem 0 0.55rem;
  color: var(--clr-text);
}

.page-about .chrono-item__card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--clr-muted);
}

.page-about .chrono-item--current .chrono-item__card {
  border-color: var(--clr-primary);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.09), rgba(17, 21, 26, 0.84) 45%);
}

.page-about .chrono-item--current .chrono-item__mark {
  background: var(--clr-accent);
  box-shadow: 0 0 22px rgba(255, 107, 0, 0.6);
  animation: aboutPulse 2.2s var(--ease-out) infinite;
}

.page-about .chrono-media {
  position: relative;
  margin: 2rem 0 2.2rem;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
}

.page-about .chrono-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-lg);
}

.page-about .chrono-media figcaption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  margin: 0;
  padding: 0.35rem 0.8rem;
  background: rgba(13, 13, 13, 0.72);
  border: 1px solid rgba(198, 255, 0, 0.3);
  border-radius: var(--radius-pill);
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--clr-primary);
}

/* ===== 数据生产流水线 ===== */
.page-about .production-flow {
  display: grid;
  gap: 1.2rem;
  margin-top: 2.4rem;
}

.page-about .production-step {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.4rem;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .production-step::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, transparent 50%, rgba(198, 255, 0, 0.14) 50%);
}

.page-about .production-step::after {
  content: '';
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 12px;
  height: 12px;
  border-right: 1px solid rgba(198, 255, 0, 0.3);
  border-top: 1px solid rgba(198, 255, 0, 0.3);
  transform: rotate(45deg);
}

.page-about .production-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  margin-bottom: 0.9rem;
  padding: 0 0.6rem;
  border: 1px solid rgba(198, 255, 0, 0.45);
  border-radius: var(--radius-pill);
  font-family: var(--font-numeric);
  font-size: 0.85rem;
  color: var(--clr-primary);
}

.page-about .production-step h3 {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 500;
  margin: 0 0 0.6rem;
  color: var(--clr-text);
}

.page-about .production-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--clr-muted);
}

/* ===== 团队与组织形态 ===== */
.page-about .about-team__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.4rem;
}

.page-about .about-team__roles {
  display: grid;
  gap: 1rem;
}

.page-about .role-card {
  padding: 1.2rem 1.3rem;
  background: var(--clr-panel);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  transition: transform 0.25s var(--ease-out), border-color 0.25s, box-shadow 0.25s;
}

.page-about .role-card:hover {
  transform: translateX(8px);
  border-color: rgba(198, 255, 0, 0.5);
  box-shadow: var(--shadow-card);
}

.page-about .role-card .c-label {
  margin-bottom: 0.5rem;
  color: var(--clr-accent);
}

.page-about .role-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0 0 0.45rem;
  color: var(--clr-text);
  transition: color 0.25s;
}

.page-about .role-card:hover h3 {
  color: var(--clr-primary);
}

.page-about .role-card h3 strong {
  font-family: var(--font-numeric);
  font-size: 1.45rem;
  font-weight: 500;
  color: var(--clr-primary);
}

.page-about .role-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--clr-muted);
}

.page-about .about-team__figure img,
.page-about .about-cn__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
  object-fit: cover;
}

.page-about .about-team__figure figcaption,
.page-about .about-cn__figure figcaption {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--clr-muted);
}

/* ===== 中国区订阅读赛通道适配 ===== */
.page-about .about-cn__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.4rem;
}

.page-about .about-cn__features {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cn-feature {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 14px;
  padding: 1.1rem 1.2rem;
  background: rgba(17, 21, 26, 0.7);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
}

.page-about .cn-feature__tag {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--clr-primary);
}

.page-about .cn-feature p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--clr-muted);
}

.page-about .cn-console {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0A0C0F;
}

.page-about .cn-console__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--clr-border);
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--clr-muted);
  background: rgba(255, 255, 255, 0.02);
}

.page-about .cn-console__led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-primary);
  box-shadow: 0 0 10px var(--about-glow);
}

.page-about .cn-console__list {
  list-style: none;
  margin: 0;
  padding: 0.8rem 1rem;
  display: grid;
  gap: 0.6rem;
}

.page-about .cn-console__list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-numeric);
  font-size: 0.78rem;
  color: var(--clr-text);
}

.page-about .cn-console__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-cyan);
  box-shadow: 0 0 8px rgba(0, 236, 210, 0.5);
}

/* ===== 资质与合作生态 ===== */
.page-about .cred-grid {
  display: grid;
  gap: 1.2rem;
  margin-top: 2.4rem;
}

.page-about .cred-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.05), transparent 45%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .cred-card__status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
  font-family: var(--font-numeric);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--clr-primary);
}

.page-about .cred-card__status::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-primary);
  box-shadow: 0 0 12px var(--about-glow);
}

.page-about .cred-card h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0 0 0.7rem;
  color: var(--clr-text);
}

.page-about .cred-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--clr-muted);
}

/* ===== 品牌 CTA ===== */
.page-about .about-cta {
  position: relative;
}

.page-about .about-cta__inner {
  text-align: center;
  max-width: 760px;
}

.page-about .about-cta h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin: 0 auto;
}

.page-about .about-cta__text {
  margin: 1.2rem auto 2rem;
  max-width: 560px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--clr-muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
}

/* ===== 桌面端布局 ===== */
@media (min-width: 600px) {
  .page-about .about-hero__stat-num {
    font-size: 1.8rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-bottom: 5rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 3.5rem;
  }

  .page-about .about-hero__lead {
    font-size: 1.05rem;
  }

  .page-about .about-hero__panel {
    padding: 1.5rem;
  }

  .page-about .chrono-item {
    grid-template-columns: 90px 28px 1fr;
    column-gap: 20px;
    margin-bottom: 1.8rem;
  }

  .page-about .chrono-item::before {
    left: 123px;
    top: 48px;
    bottom: -1.8rem;
  }

  .page-about .chrono-item__num {
    font-size: 1rem;
    padding-top: 26px;
  }

  .page-about .chrono-item__mark {
    width: 14px;
    height: 14px;
    margin-top: 28px;
  }

  .page-about .chrono-item__card {
    padding: 1.2rem 1.4rem;
  }

  .page-about .chrono-item__card h3 {
    font-size: 1.3rem;
  }

  .page-about .chrono-item__card p {
    font-size: 0.92rem;
  }

  .page-about .chrono-media {
    margin: 2.5rem 0 3rem;
  }

  .page-about .production-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 0.86fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .about-cn__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .cn-feature {
    grid-template-columns: 96px 1fr;
  }

  .page-about .cred-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-offset) + 4rem);
  }

  .page-about .chrono-track {
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .chrono-item {
    margin-bottom: 2.2rem;
  }

  .page-about .about-team__grid {
    gap: 4rem;
  }
}