.page-about {
  --about-red: #E8362D;
  --about-yellow: #F7B500;
  --about-blue: #1F80FF;
  --about-panel: #1A1A1A;
  --about-line: #2F2F2F;
  --about-font-head: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --about-font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --about-font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  background: var(--about-panel);
  color: #FFFFFF;
  position: relative;
  display: block;
}

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

.page-about .about-content {
  max-width: 100%;
  padding: 0 0 0 0;
}

.page-about .about-hero {
  position: relative;
  background: linear-gradient(135deg, #0D0D0D 0%, #111111 55%, #1A1A1A 100%);
  padding: 80px 20px 72px;
  overflow: hidden;
}

.page-about .about-hero__slant {
  position: absolute;
  bottom: -40px;
  right: -20px;
  background: var(--about-red);
  width: 220px;
  height: 120px;
  transform: skewX(-28deg);
  transform-origin: right bottom;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-hero__slant-code {
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: skewX(28deg);
}

.page-about .about-hero__eyebrow {
  color: var(--about-red);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin: 0 0 16px;
}

.page-about .about-hero__title {
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: 42px;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.page-about .about-hero__title em {
  color: var(--about-red);
  font-style: normal;
}

.page-about .about-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: #B0B0B0;
  max-width: 520px;
  margin: 0 0 24px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-about .about-hero__meta-text {
  font-size: 12px;
  color: #B0B0B0;
  border-left: 1px solid #2F2F2F;
  padding-left: 12px;
}

.page-about .about-section {
  padding: 72px 20px 64px;
  border-top: 1px solid #2F2F2F;
  scroll-margin-top: 80px;
}

.page-about .about-section__heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-section__num {
  color: var(--about-red);
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-section__title {
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: 28px;
  color: #FFFFFF;
  margin: 0;
  letter-spacing: -0.01em;
}

.page-about .about-mission__main {
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.5;
  color: #FFFFFF;
  margin: 0 0 20px;
  padding: 20px;
  border-left: 4px solid var(--about-red);
  background: #141414;
}

.page-about .about-mission__sub {
  font-size: 15px;
  line-height: 1.8;
  color: #B0B0B0;
  margin: 0 0 36px;
}

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

.page-about .about-mission__item {
  background: #141414;
  padding: 24px;
  border-top: 2px solid transparent;
  transition: border-color 0.30s ease;
}

.page-about .about-mission__item:hover {
  border-top-color: var(--about-red);
}

.page-about .about-mission__icon {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--about-yellow);
  margin-bottom: 12px;
}

.page-about .about-mission__item-title {
  font-family: var(--about-font-head);
  font-weight: 800;
  font-size: 18px;
  margin: 0 0 8px;
}

.page-about .about-mission__item-text {
  font-size: 14px;
  line-height: 1.7;
  color: #B0B0B0;
  margin: 0;
}

.page-about .about-timeline__img-wrap {
  margin-bottom: 28px;
}

.page-about .about-timeline__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
}

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

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #2F2F2F;
  transform: skewX(-18deg);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 32px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--about-red);
  transform: skewX(-18deg) rotate(8deg);
  border: 2px solid #0D0D0D;
  outline: 2px solid var(--about-red);
}

.page-about .about-timeline__item--featured::before {
  background: var(--about-yellow);
  outline-color: var(--about-yellow);
  box-shadow: 0 0 12px rgba(247, 181, 0, 0.5);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--about-red);
  margin-bottom: 6px;
  letter-spacing: 0.06em;
}

.page-about .about-timeline__item--featured .about-timeline__year {
  color: var(--about-yellow);
}

.page-about .about-timeline__content {
  background: #141414;
  padding: 18px 20px;
  border-left: 2px solid #2F2F2F;
}

.page-about .about-timeline__item--featured .about-timeline__content {
  border-left-color: var(--about-yellow);
}

.page-about .about-timeline__title {
  font-family: var(--about-font-head);
  font-weight: 800;
  font-size: 16px;
  margin: 0 0 6px;
}

.page-about .about-timeline__text {
  font-size: 13px;
  line-height: 1.7;
  color: #B0B0B0;
  margin: 0;
}

.page-about .about-timeline__note {
  margin-top: 24px;
  padding: 16px 20px;
  background: #141414;
  border: 1px solid #2F2F2F;
}

.page-about .about-link {
  color: var(--about-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 128, 255, 0.4);
}

.page-about .about-link:hover {
  color: var(--about-yellow);
  border-bottom-color: var(--about-yellow);
}

.page-about .about-data__img-wrap {
  margin-bottom: 24px;
}

.page-about .about-data__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-data__stat {
  background: #0D0D0D;
  border-top: 3px solid var(--about-red);
  padding: 18px 14px;
  text-align: center;
}

.page-about .about-data__stat:nth-child(2) {
  border-top-color: var(--about-yellow);
}

.page-about .about-data__stat:nth-child(3) {
  border-top-color: var(--about-blue);
}

.page-about .about-data__stat:nth-child(4) {
  border-top-color: var(--about-yellow);
}

.page-about .about-data__stat-num {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
  margin-bottom: 4px;
}

.page-about .about-data__stat-label {
  font-size: 12px;
  color: #B0B0B0;
}

.page-about .about-data__detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-data__block {
  background: #141414;
  padding: 24px;
  border-left: 3px solid var(--about-red);
}

.page-about .about-data__block:nth-child(2) {
  border-left-color: var(--about-yellow);
}

.page-about .about-data__block:nth-child(3) {
  border-left-color: var(--about-blue);
}

.page-about .about-data__block-title {
  font-family: var(--about-font-head);
  font-weight: 800;
  font-size: 16px;
  margin: 0 0 10px;
}

.page-about .about-data__block p {
  font-size: 14px;
  line-height: 1.75;
  color: #B0B0B0;
  margin: 0;
}

.page-about .about-honors__img-wrap {
  margin-bottom: 28px;
}

.page-about .about-honors__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 4px;
}

.page-about .about-honors__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-honors__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #141414;
  padding: 20px;
  border-right: 4px solid var(--about-red);
}

.page-about .about-honors__item:nth-child(2) {
  border-right-color: var(--about-yellow);
}

.page-about .about-honors__item:nth-child(3) {
  border-right-color: var(--about-yellow);
}

.page-about .about-honors__item:nth-child(4) {
  border-right-color: var(--about-red);
}

.page-about .about-honors__item .badge {
  flex-shrink: 0;
  margin-top: 2px;
}

.page-about .about-honors__item-title {
  font-family: var(--about-font-head);
  font-weight: 800;
  font-size: 15px;
  margin: 0 0 6px;
}

.page-about .about-honors__item-text {
  font-size: 13px;
  line-height: 1.65;
  color: #B0B0B0;
  margin: 0;
}

.page-about .about-honors__trust {
  margin-top: 32px;
  padding: 24px;
  background: linear-gradient(135deg, #0D0D0D 0%, #141414 100%);
  border: 1px solid #2F2F2F;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-honors__trust-text {
  font-size: 14px;
  line-height: 1.7;
  color: #B0B0B0;
  margin: 0;
}

.page-about .about-honors__btn {
  align-self: flex-start;
}

.page-about .about-more {
  background: #0D0D0D;
  padding: 56px 20px;
  border-top: 1px solid #2F2F2F;
}

.page-about .about-more__inner {
  max-width: 320px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-more__title {
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: 20px;
  margin: 0 0 24px;
}

.page-about .about-more__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
}

.page-about .about-more__link {
  color: var(--about-blue);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.30s ease;
}

.page-about .about-more__link:hover {
  border-bottom-color: var(--about-yellow);
  color: var(--about-yellow);
}

.page-about .about-index__label {
  font-size: 11px;
  color: #B0B0B0;
  letter-spacing: 0.12em;
  margin: 0 0 24px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #B0B0B0;
  padding: 10px 12px;
  background: transparent;
  transition: background 0.30s ease, color 0.30s ease;
}

.page-about .about-index__link:hover {
  background: rgba(232, 54, 45, 0.1);
  color: #FFFFFF;
}

.page-about .about-index__num {
  font-size: 11px;
  font-weight: 700;
  color: var(--about-red);
}

.page-about .about-index__text {
  font-size: 14px;
  font-weight: 500;
}

.page-about .about-index__status {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid #2F2F2F;
}

.page-about .about-index__dot {
  width: 8px;
  height: 8px;
  background: var(--about-red);
  border-radius: 50%;
  animation: about-pulse 1.8s ease infinite;
}

@keyframes about-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.45;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__dot {
    animation: none;
  }
  .page-about .about-mission__item,
  .page-about .about-data__stat,
  .page-about .about-honors__item {
    transition: none;
  }
}

@media (min-width: 640px) {
  .page-about .about-mission__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-data__detail {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-timeline__list {
    padding-left: 20px;
  }
}

@media (min-width: 960px) {
  .page-about {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    max-width: 1280px;
    margin: 0 auto;
  }
  .page-about .about-content {
    min-width: 0;
  }
  .page-about .about-index {
    position: sticky;
    top: 96px;
    align-self: start;
    display: block;
    padding: 24px 16px 24px 0;
  }
  .page-about .about-hero {
    padding: 100px 48px 88px;
  }
  .page-about .about-hero__title {
    font-size: 56px;
  }
  .page-about .about-hero__lead {
    max-width: 620px;
  }
  .page-about .about-section {
    padding: 88px 48px 88px;
  }
  .page-about .about-section__heading {
    gap: 16px;
    margin-bottom: 40px;
  }
  .page-about .about-section__title {
    font-size: 36px;
  }
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-timeline__img-wrap {
    grid-row: span 2;
    margin-bottom: 0;
  }
  .page-about .about-data__img-wrap {
    margin-bottom: 0;
  }
  .page-about .about-more {
    padding: 72px 48px;
  }
  .page-about .about-more__title {
    font-size: 26px;
  }
}