.page-about {
  --about-purple-glow: rgba(123, 47, 255, 0.15);
  --about-cyan-glow: rgba(0, 229, 255, 0.1);
  --about-timeline-line: rgba(123, 47, 255, 0.35);
  --about-card-bg: linear-gradient(135deg, rgba(16, 27, 61, 0.92), rgba(22, 33, 74, 0.88));
  --about-stat-bg: rgba(16, 27, 61, 0.72);
  background: linear-gradient(180deg, #0A1128 0%, #0c1433 30%, #101B3D 62%, #0A1128 100%);
  color: #E6F1FF;
  font-family: var(--font-body, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif);
  min-height: 100%;
  overflow-x: hidden;
  line-height: 1.75;
}

.page-about .l-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.page-about .about-hero {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 40px 0 48px;
  border-bottom: 1px solid #233057;
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 80% 20%, rgba(123, 47, 255, 0.18), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__text,
.page-about .about-hero__figure {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__text {
  flex: 1;
}

.page-about .about-hero__title {
  font-family: var(--font-heading, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.18;
  margin: 16px 0 20px;
  letter-spacing: -0.02em;
  color: #E6F1FF;
}

.page-about .about-hero__lead {
  font-size: 16px;
  color: #9AA8C7;
  max-width: 620px;
  margin-bottom: 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid #233057;
  border-radius: 12px;
  overflow: hidden;
  background: #101B3D;
  box-shadow: var(--shadow-card, 0 8px 24px rgba(0, 0, 0, 0.35));
  transform: rotate(0deg);
  transition: transform 0.3s ease-out;
}

.page-about .about-hero__figure:hover {
  transform: translateY(-4px) rotate(-0.5deg);
}

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

.page-about .about-hero__figure figcaption,
.page-about .about-figure figcaption {
  font-size: 13px;
  color: #9AA8C7;
  padding: 12px 16px;
  border-top: 1px solid #233057;
  font-family: var(--font-data, "Roboto Mono", monospace);
  letter-spacing: 0.02em;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding-top: 8px;
}

.page-about .about-side {
  display: none;
}

.page-about .about-content {
  display: flex;
  flex-direction: column;
  gap: 72px;
  padding-top: 8px;
}

.page-about .about-section {
  scroll-margin-top: 88px;
  position: relative;
}

.page-about .about-section__title {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 900;
  line-height: 1.3;
  margin: 8px 0 16px;
  color: #E6F1FF;
  letter-spacing: -0.01em;
}

.page-about .about-section__desc {
  color: #9AA8C7;
  font-size: 15px;
  max-width: 640px;
  margin-bottom: 28px;
}

.page-about .c-section-label {
  display: inline-block;
  font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
  font-size: 13px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #7B2FFF;
  border-left: 3px solid #00E5FF;
  padding-left: 12px;
  margin-bottom: 8px;
}

.page-about .about-intro p {
  margin-bottom: 18px;
  font-size: 15.5px;
  color: #9AA8C7;
}

.page-about .about-intro p:first-child::first-letter {
  font-size: 3.2em;
  font-weight: 900;
  color: #0A1128;
  background: linear-gradient(135deg, #00E5FF, #7B2FFF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  float: left;
  line-height: 1;
  padding-right: 8px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-stat-card {
  background: var(--about-stat-bg);
  border: 1px solid #233057;
  border-radius: 12px;
  padding: 20px 16px;
  position: relative;
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
  overflow: hidden;
}

.page-about .about-stat-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.7), transparent);
  opacity: 0.5;
}

.page-about .about-stat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 6px 24px rgba(0, 229, 255, 0.14);
}

.page-about .about-stat-card__num {
  font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  margin: 0 0 6px;
  color: #39FF14;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .about-stat-card:nth-child(2n) .about-stat-card__num {
  color: #00E5FF;
}

.page-about .about-stat-card--feature .about-stat-card__num {
  color: #FF6B00;
}

.page-about .about-stat-card__label {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 6px;
  color: #E6F1FF;
}

.page-about .about-stat-card__note {
  font-size: 13px;
  color: #9AA8C7;
  margin: 0;
  line-height: 1.5;
}

.page-about .about-figure {
  margin: 36px 0 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #233057;
  background: #101B3D;
}

.page-about .about-figure img {
  max-height: 300px;
  width: 100%;
}

.page-about .about-timeline {
  position: relative;
  margin: 36px 0 0;
  padding-left: 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, #00E5FF 0%, #7B2FFF 55%, #233057 100%);
  border-radius: 2px;
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 36px;
}

.page-about .about-timeline__item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -24px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: #0A1128;
  border: 2px solid #00E5FF;
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
  transition: background 0.3s ease-out, transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: #00E5FF;
  transform: rotate(45deg) scale(1.2);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.7);
}

.page-about .about-timeline__panel {
  background: rgba(16, 27, 61, 0.72);
  border: 1px solid #233057;
  border-left: 3px solid rgba(123, 47, 255, 0.7);
  border-radius: 10px;
  padding: 20px 20px 18px;
  transition: background 0.3s ease-out, border-color 0.3s ease-out, box-shadow 0.3s ease-out;
}

.page-about .about-timeline__item:hover .about-timeline__panel {
  background: rgba(22, 33, 74, 0.9);
  border-left-color: #00E5FF;
  box-shadow: 0 6px 24px rgba(0, 229, 255, 0.08);
}

.page-about .about-timeline__year {
  font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
  font-size: 15px;
  font-weight: 700;
  color: #00E5FF;
  margin: 0 0 8px;
  letter-spacing: 0.06em;
}

.page-about .about-timeline__heading {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: #E6F1FF;
}

.page-about .about-timeline__body {
  font-size: 14.5px;
  color: #9AA8C7;
  margin: 0;
}

.page-about .about-cert {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-cert-card {
  background: var(--about-card-bg);
  border: 1px solid #233057;
  border-radius: 14px;
  padding: 26px 22px;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease-out, border-color 0.25s ease-out, box-shadow 0.25s ease-out;
}

.page-about .about-cert-card:hover {
  transform: translateY(-3px);
  border-color: rgba(123, 47, 255, 0.45);
  box-shadow: 0 8px 28px rgba(123, 47, 255, 0.18);
}

.page-about .about-cert-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: radial-gradient(circle at top right, rgba(123, 47, 255, 0.18), transparent 70%);
  pointer-events: none;
}

.page-about .about-cert-card__badge {
  display: inline-block;
  font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #FF6B00;
  border: 1px solid rgba(255, 107, 0, 0.4);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 14px;
  background: rgba(255, 107, 0, 0.06);
}

.page-about .about-cert-card__title {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 10px;
  color: #E6F1FF;
  line-height: 1.4;
}

.page-about .about-cert-card__body {
  font-size: 14.5px;
  color: #9AA8C7;
  margin: 0;
}

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

.page-about .about-team__intro {
  border-left: 3px solid #00E5FF;
  padding: 4px 0 4px 18px;
  margin-bottom: 28px;
}

.page-about .about-team__intro p {
  font-size: 15px;
  color: #9AA8C7;
  margin: 0;
  max-width: 680px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team-item {
  background: rgba(16, 27, 61, 0.68);
  border: 1px solid #233057;
  border-radius: 12px;
  padding: 22px 20px;
  transition: background 0.25s ease-out, transform 0.25s ease-out;
}

.page-about .about-team-item:hover {
  background: rgba(22, 33, 74, 0.82);
  transform: translateY(-2px);
}

.page-about .about-team-item__title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  color: #E6F1FF;
  position: relative;
  padding-left: 16px;
}

.page-about .about-team-item__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  background: #00E5FF;
  transform: rotate(45deg);
}

.page-about .about-team-item__body {
  font-size: 14px;
  color: #9AA8C7;
  margin: 0;
}

.page-about .about-content__footer {
  background: linear-gradient(135deg, rgba(123, 47, 255, 0.12), rgba(0, 229, 255, 0.06));
  border: 1px solid #233057;
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-content__footer-title {
  font-size: 20px;
  font-weight: 900;
  margin: 8px 0 0;
  color: #E6F1FF;
}

.page-about .about-content__footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-content__footer-link {
  display: inline-block;
  color: #E6F1FF;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px solid #3A4C7A;
  border-radius: 8px;
  background: rgba(10, 17, 40, 0.5);
  transition: border-color 0.25s ease-out, color 0.25s ease-out, box-shadow 0.25s ease-out;
}

.page-about .about-content__footer-link:hover,
.page-about .about-content__footer-link:focus-visible {
  border-color: #00E5FF;
  color: #00E5FF;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.18);
}

.page-about .is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .page-about .l-container {
    padding: 0 32px 64px;
  }

  .page-about .about-hero {
    flex-direction: row;
    align-items: center;
    gap: 48px;
    padding: 64px 0 72px;
  }

  .page-about .about-hero__text {
    flex: 1.2;
  }

  .page-about .about-hero__figure {
    flex: 1;
    margin: 0;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-cert {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
}

@media (min-width: 1024px) {
  .page-about .l-container {
    padding: 0 40px 80px;
  }

  .page-about .about-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-side {
    display: block;
    position: sticky;
    top: 96px;
    padding-top: 32px;
  }

  .page-about .about-side__nav {
    border-left: 2px solid #233057;
    padding-left: 18px;
  }

  .page-about .about-side__label {
    font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #7B2FFF;
    margin: 0 0 16px;
  }

  .page-about .about-side__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-side__link {
    display: block;
    padding: 6px 8px;
    color: #9AA8C7;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-left: 2px solid transparent;
    transition: color 0.2s ease-out, border-color 0.2s ease-out;
  }

  .page-about .about-side__link:hover,
  .page-about .about-side__link.is-active {
    color: #00E5FF;
    border-left-color: #00E5FF;
  }

  .page-about .about-side__info {
    margin-top: 40px;
    background: rgba(16, 27, 61, 0.6);
    border: 1px solid #233057;
    border-radius: 12px;
    padding: 20px 16px;
  }

  .page-about .about-side__text {
    font-size: 13px;
    color: #9AA8C7;
    margin: 8px 0;
  }

  .page-about .about-side__contact {
    font-family: var(--font-data, "Roboto Mono", "SFMono-Regular", "Cascadia Code", monospace);
    font-size: 13px;
    color: #00E5FF;
    word-break: break-all;
  }

  .page-about .about-content {
    gap: 96px;
  }

  .page-about .about-timeline {
    padding-left: 36px;
  }

  .page-about .about-timeline::before {
    left: 16px;
  }

  .page-about .about-timeline__dot {
    left: -32px;
  }

  .page-about .about-timeline__item {
    margin-bottom: 44px;
  }

  .page-about .about-content__footer {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 36px 40px;
  }

  .page-about .about-content__footer-title {
    margin-top: 4px;
  }
}