.page-about {
  --about-red: #E6321A;
  --about-blue: #1B4FC4;
  --about-green: #0FA862;
  --about-gold: #F5C518;
  --about-dark: #0D0D12;
  --about-light: #F5F6FA;
  --about-card: #FFFFFF;
  --about-text: #1A1A24;
  --about-muted: #5C5C70;
  --about-data: "SF Mono", "Roboto Mono", "Courier New", monospace;
  background: var(--about-light);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  background: var(--about-dark);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 12px 0;
}
.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .breadcrumb__link {
  color: var(--about-gold);
  text-decoration: none;
  font-size: 13px;
  transition: color .2s ease;
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus {
  color: #fff;
}
.page-about .breadcrumb__sep {
  color: rgba(255,255,255,0.32);
  font-size: 13px;
}
.page-about .breadcrumb__current {
  color: rgba(255,255,255,0.76);
  font-size: 13px;
}

.page-about .about-hero {
  position: relative;
  background: var(--about-dark);
  color: var(--about-card);
  padding: 48px 20px 64px;
  overflow: hidden;
}
.page-about .about-hero__decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent 0px,
    transparent 14px,
    rgba(255,255,255,0.018) 14px,
    rgba(255,255,255,0.018) 16px
  );
}
.page-about .about-hero__decor span:nth-child(1) {
  position: absolute;
  top: 0;
  right: -10%;
  width: 46%;
  height: 100%;
  background: linear-gradient(160deg, rgba(230,50,26,0.32), rgba(230,50,26,0.03));
  clip-path: polygon(12% 0, 100% 0, 100% 100%, 0 100%);
  transform: skewX(-8deg);
}
.page-about .about-hero__decor span:nth-child(2) {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60%;
  height: 36px;
  background: linear-gradient(90deg, var(--about-red), var(--about-gold));
  opacity: 0.14;
  clip-path: polygon(0 0, 100% 0, 97% 100%, 0 100%);
}
.page-about .about-hero__decor span:nth-child(3) {
  position: absolute;
  top: 0;
  left: 38%;
  width: 1px;
  height: 100%;
  background: rgba(255,255,255,0.07);
  transform: rotate(24deg);
}
.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.page-about .about-hero__kicker {
  display: inline-block;
  font-family: var(--about-data);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--about-gold);
  background: rgba(245,197,24,0.08);
  border-left: 3px solid var(--about-gold);
  padding: 7px 12px;
  margin-bottom: 22px;
  transform: skewX(-12deg);
}
.page-about .about-hero__copy h1 {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -1px;
  margin: 0 0 18px;
  max-width: 720px;
}
.page-about .about-hero__lead {
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255,255,255,0.84);
  max-width: 620px;
  margin: 0 0 26px;
}
.page-about .about-hero__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-hero__tags .badge {
  font-size: 12px;
  letter-spacing: 0.2px;
}
.page-about .about-hero__markbox {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 16px;
  position: relative;
}
.page-about .about-hero__word {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(120px, 30vw, 220px);
  font-weight: 900;
  line-height: 0.82;
  background: linear-gradient(135deg, #F5C518 0%, #E6A700 60%, #C98900 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 32px rgba(245,197,24,0.18));
  transform: skewX(-4deg);
  user-select: none;
}
.page-about .about-hero__note {
  color: rgba(255,255,255,0.52);
  font-size: 12px;
  margin-top: 10px;
}
.page-about .about-hero__note::before {
  content: "";
  display: block;
  width: 2px;
  height: 36px;
  background: var(--about-red);
  margin: 0 auto 6px;
}

.page-about .about-layout {
  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 0 72px;
}

.page-about .about-rail {
  position: relative;
  background: var(--about-light);
  padding: 28px 20px 32px;
  border-bottom: 2px solid var(--about-red);
}
.page-about .about-rail__inner {
  position: relative;
}
.page-about .about-rail__label {
  font-family: var(--about-data);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--about-muted);
  margin: 0 0 16px;
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.page-about .about-timeline__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 12px;
  background: var(--about-card);
  border: 1px solid #e2e5ee;
  border-radius: var(--radius);
  color: var(--about-text);
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.page-about .about-timeline__link:hover,
.page-about .about-timeline__link:focus {
  border-color: var(--about-red);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(13,13,18,0.08);
}
.page-about .about-timeline__num {
  font-family: var(--about-data);
  font-size: 12px;
  font-weight: 700;
  color: var(--about-red);
}
.page-about .about-timeline__text {
  font-size: 14px;
  font-weight: 600;
}
.page-about .about-rail__tip {
  margin-top: 16px;
  font-size: 12px;
  color: var(--about-muted);
  font-family: var(--about-data);
  padding-left: 2px;
}

.page-about .about-content {
  display: flex;
  flex-direction: column;
}
.page-about .about-section {
  background: var(--about-card);
  padding: 48px 20px;
  border-top: 5px solid transparent;
  position: relative;
}
.page-about .about-section--origin {
  border-top-color: var(--about-red);
}
.page-about .about-section--milestone {
  border-top-color: var(--about-blue);
}
.page-about .about-section--mission {
  border-top-color: var(--about-green);
}
.page-about .about-section--culture {
  border-top-color: var(--about-gold);
}
.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
  border-bottom: 2px solid var(--about-dark);
  padding-bottom: 14px;
}
.page-about .about-section__index {
  display: inline-block;
  font-family: var(--about-data);
  font-size: 13px;
  font-weight: 700;
  color: var(--about-card);
  background: var(--about-dark);
  padding: 6px 10px 5px;
  border-radius: 2px;
  transform: skewX(-12deg);
  box-shadow: 3px 3px 0 var(--about-red);
  align-self: center;
  flex-shrink: 0;
}
.page-about .about-section__head h2 {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin: 0;
}

.page-about .about-figure {
  margin: 0 0 24px;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(145deg, #e8eaf2, #d3d8e8);
  box-shadow: var(--shadow-card);
  position: relative;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  object-position: center;
}
.page-about .about-figure figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  right: 12px;
  background: rgba(13,13,18,0.72);
  color: rgba(255,255,255,0.88);
  font-size: 12px;
  line-height: 1.6;
  padding: 8px 12px;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}
.page-about .about-section__body {
  max-width: 900px;
}
.page-about .about-section__body p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text);
  margin: 0 0 16px;
}
.page-about .about-section__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-statbar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-statbar__item {
  background: var(--about-light);
  border-left: 4px solid var(--about-red);
  padding: 14px 14px 12px;
  border-radius: 4px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.page-about .about-statbar__item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(13,13,18,0.06);
}
.page-about .about-statbar__num {
  display: block;
  font-family: var(--about-data);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--about-red);
}
.page-about .about-statbar__label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  color: var(--about-muted);
}

.page-about .milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .milestone-list::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 9px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-red), var(--about-blue) 50%, var(--about-green));
  border-radius: 2px;
}
.page-about .milestone-list__item {
  position: relative;
  padding: 12px 0 28px 34px;
}
.page-about .milestone-list__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-card);
  border: 4px solid var(--about-blue);
  box-shadow: 0 0 0 3px rgba(27,79,196,0.12);
  z-index: 1;
}
.page-about .milestone-list__item:nth-child(even)::before {
  border-color: var(--about-green);
  box-shadow: 0 0 0 3px rgba(15,168,98,0.12);
}
.page-about .milestone-list__tag {
  display: inline-block;
  font-family: var(--about-data);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--about-card);
  background: var(--about-blue);
  padding: 5px 10px 4px;
  border-radius: 2px;
  margin-bottom: 8px;
}
.page-about .milestone-list__item:nth-child(even) .milestone-list__tag {
  background: var(--about-green);
}
.page-about .milestone-list__content h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--about-text);
  margin: 0 0 6px;
}
.page-about .milestone-list__content p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-mission {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.page-about .about-mission__body p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text);
  margin: 0 0 14px;
}
.page-about .about-mission__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-mission__body strong {
  color: var(--about-green);
  font-weight: 700;
}
.page-about .about-quote {
  border-left: 4px solid var(--about-gold);
  padding: 14px 16px;
  margin: 18px 0 0;
  background: #fff9e0;
  border-radius: 0 4px 4px 0;
}
.page-about .about-quote p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-text);
}
.page-about .about-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-principles__item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--about-light);
  border-radius: 4px;
  padding: 14px 16px;
  border-left: 4px solid var(--about-green);
  transition: transform .2s ease, box-shadow .2s ease;
}
.page-about .about-principles__item:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 14px rgba(13,13,18,0.06);
}
.page-about .about-principles__num {
  font-family: var(--about-data);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-green);
}
.page-about .about-principles__text {
  font-size: 14px;
  font-weight: 600;
  color: var(--about-text);
}

.page-about .about-culture {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 30px;
}
.page-about .about-culture__body p {
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text);
  margin: 0;
}
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}
.page-about .filter-bar .tag-btn {
  -webkit-appearance: none;
  appearance: none;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid #d8dae4;
  background: var(--about-card);
  color: var(--about-text);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}
.page-about .filter-bar .tag-btn:hover,
.page-about .filter-bar .tag-btn:focus-visible {
  border-color: var(--about-blue);
  transform: translateY(-1px);
}
.page-about .filter-bar .tag-btn.is-active {
  background: var(--about-blue);
  border-color: var(--about-blue);
  color: #fff;
}
.page-about .team-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .team-card {
  background: var(--about-light);
  border-radius: 6px;
  padding: 24px 20px 20px;
  border-top: 4px solid transparent;
  position: relative;
  transition: transform .2s ease, box-shadow .2s ease;
}
.page-about .team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(13,13,18,0.07);
}
.page-about .team-card:nth-child(1) {
  border-top-color: var(--about-red);
}
.page-about .team-card:nth-child(2) {
  border-top-color: var(--about-blue);
}
.page-about .team-card:nth-child(3) {
  border-top-color: var(--about-gold);
}
.page-about .team-card:nth-child(4) {
  border-top-color: var(--about-green);
}
.page-about .team-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--about-dark);
  color: var(--about-gold);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 14px;
}
.page-about .team-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--about-text);
  margin: 0 0 8px;
}
.page-about .team-card p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-next {
  background: var(--about-dark);
  color: var(--about-card);
  padding: 48px 20px;
  margin-top: 48px;
  position: relative;
  overflow: hidden;
}
.page-about .about-next::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--about-red) 0%, var(--about-gold) 45%, var(--about-green) 80%, var(--about-blue) 100%);
}
.page-about .about-next__inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  text-align: center;
}
.page-about .about-next__label {
  font-family: var(--about-data);
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--about-gold);
  text-transform: uppercase;
  margin: 0 0 12px;
}
.page-about .about-next h2 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin: 0 0 26px;
}
.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.page-about .about-next__links .btn {
  font-size: 14px;
  font-weight: 700;
  padding: 12px 20px;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.page-about .about-next__links .btn--primary {
  background: var(--about-red);
  color: #fff;
  box-shadow: 0 6px 18px rgba(230,50,26,0.32);
}
.page-about .about-next__links .btn--primary:hover,
.page-about .about-next__links .btn--primary:focus {
  background: #cc2b16;
  transform: translateY(-2px);
}
.page-about .about-next__links .btn--outline {
  border: 1px solid rgba(255,255,255,0.4);
  color: var(--about-card);
}
.page-about .about-next__links .btn--outline:hover,
.page-about .about-next__links .btn--outline:focus {
  border-color: var(--about-gold);
  color: var(--about-gold);
  transform: translateY(-2px);
}

@media (min-width: 640px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-statbar {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-principles {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .team-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 64px 20px 80px;
  }
  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 48px;
  }
  .page-about .about-hero__lead {
    font-size: 16px;
  }
  .page-about .about-section {
    padding: 56px 28px;
  }
  .page-about .about-mission {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    align-items: start;
    gap: 28px;
  }
  .page-about .about-culture {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 28px;
  }
  .page-about .about-figure {
    margin-bottom: 0;
  }
  .page-about .about-mission .about-figure,
  .page-about .about-culture .about-figure {
    height: 100%;
  }
  .page-about .about-mission .about-figure img,
  .page-about .about-culture .about-figure img {
    height: 100%;
    object-fit: cover;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 88px 20px 104px;
  }
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 36px;
    align-items: start;
    padding-top: 40px;
  }
  .page-about .about-rail {
    position: sticky;
    top: 24px;
    background: transparent;
    padding: 0;
    border-bottom: 0;
  }
  .page-about .about-rail__inner {
    padding: 28px 22px;
    background: var(--about-light);
    border-radius: 8px;
    border-left: 5px solid var(--about-red);
    box-shadow: var(--shadow-card);
  }
  .page-about .about-timeline {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .page-about .about-timeline__link {
    justify-content: flex-start;
    width: 100%;
    box-sizing: border-box;
  }
  .page-about .about-timeline__text {
    font-size: 15px;
  }
  .page-about .about-rail__tip {
    margin-top: 18px;
  }
  .page-about .about-section {
    padding: 64px 36px;
  }
  .page-about .about-statbar__num {
    font-size: 36px;
  }
  .page-about .about-next {
    padding: 64px 20px;
  }
}