.page-about {
  position: relative;
  overflow-x: hidden;
  background-image: radial-gradient(circle, rgba(168, 176, 188, 0.13) 1px, transparent 1px);
  background-size: 26px 26px;
  background-position: 0 0;
}

.page-about .about-breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 24px 0;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -140px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, var(--glow-orange) 0%, transparent 66%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding: 48px 24px 72px;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-orange);
}

.page-about .about-eyebrow__dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  background: linear-gradient(135deg, var(--accent-red), var(--accent-orange));
  transform: rotate(45deg);
}

.page-about .about-hero__title {
  margin: 20px 0 18px;
  font-family: var(--font-headline);
  font-size: clamp(42px, 9vw, 76px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text-bright);
}

.page-about .about-hero__lead {
  max-width: 540px;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 40px 0 0;
  padding: 22px 0 0;
  border-top: 2px solid var(--border-dim);
}

.page-about .about-stat {
  flex: 1 1 140px;
  min-width: 120px;
  margin: 0;
}

.page-about .about-stat__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-about .about-stat__value {
  font-family: var(--font-data);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-bright);
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  aspect-ratio: 9 / 10;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  clip-path: polygon(0 0, 88% 0, 100% 10%, 100% 100%, 0 100%);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-hero__coordinate {
  position: absolute;
  left: 18px;
  bottom: 18px;
  z-index: 2;
  padding: 7px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--data-gold);
  background: rgba(10, 11, 16, 0.82);
  border: 1px solid var(--border-dim);
}

.page-about .page-about__body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.page-about .about-rail {
  padding: 32px 0 8px;
}

.page-about .about-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-about .about-rail__nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-dim) transparent;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-silver);
  text-decoration: none;
  border: 1px solid var(--border-dim);
  background: rgba(22, 26, 36, 0.6);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-rail__link:hover {
  color: var(--text-bright);
  border-color: var(--accent-orange);
}

.page-about .about-rail__link.is-active {
  color: #fff;
  border-color: var(--accent-orange);
  background: linear-gradient(135deg, rgba(255, 59, 31, 0.28), rgba(255, 122, 46, 0.12));
}

.page-about .about-section {
  position: relative;
  padding: 56px 0;
  border-bottom: 1px solid var(--border-dim);
  scroll-margin-top: 132px;
}

.page-about .about-section:last-child {
  border-bottom: 0;
}

.page-about .about-section__header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 34px;
}

.page-about .about-section__num {
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-red);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-bright);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-origin__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent-orange);
  background: rgba(255, 122, 46, 0.06);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-bright);
}

.page-about .about-quote p {
  margin: 0;
}

.page-about .about-origin__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-origin__fact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.25);
}

.page-about .about-origin__fact-label {
  font-size: 13px;
  color: var(--text-silver);
}

.page-about .about-origin__fact-value {
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  color: var(--data-gold);
  white-space: nowrap;
}

.page-about .about-panel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-panel__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-panel__cta {
  margin-top: 20px;
}

.page-about .about-text-link {
  color: var(--accent-orange);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(255, 122, 46, 0.38);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.page-about .about-text-link:hover {
  color: var(--data-gold);
  text-decoration-color: var(--data-gold);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  border-left: 2px solid var(--border-dim);
}

.page-about .about-timeline__item {
  position: relative;
  margin-left: 20px;
  padding: 0 0 40px 28px;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--accent-red);
  transform: rotate(45deg);
  border: 2px solid var(--bg-dark);
  box-shadow: 0 0 0 2px var(--border-dim), 0 0 16px var(--glow-orange);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  transform: translateX(4px);
  background: linear-gradient(90deg, rgba(255, 59, 31, 0.06), transparent 72%);
}

.page-about .about-timeline__item:focus-visible {
  outline: 3px solid var(--accent-orange);
  outline-offset: 4px;
}

.page-about .about-timeline__stamp {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 14px;
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--accent-orange);
  background: var(--bg-panel);
  border: 1px solid rgba(255, 122, 46, 0.55);
  transform: skewX(-12deg);
}

.page-about .about-timeline__season {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-bright);
}

.page-about .about-timeline__body h4 {
  margin: 6px 0 8px;
  font-family: var(--font-headline);
  font-size: 18px;
  color: var(--text-bright);
}

.page-about .about-timeline__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-silver);
}

.page-about .about-timeline__data {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--data-gold);
  border: 1px solid var(--border-dim);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__data,
.page-about .about-timeline__item:focus-within .about-timeline__data {
  color: var(--accent-orange);
  border-color: var(--accent-orange);
}

.page-about .about-panel__figure {
  margin: 40px 0 0;
  width: 100%;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.3);
}

.page-about .about-panel__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-data__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
}

.page-about .about-data__stat {
  position: relative;
  margin: 0;
  padding: 24px;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.28);
}

.page-about .about-data__stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-orange));
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.page-about .about-data__stat:hover::before {
  opacity: 1;
}

.page-about .about-data__stat--accent {
  border-color: rgba(255, 59, 31, 0.42);
  background: linear-gradient(155deg, rgba(255, 59, 31, 0.12), var(--bg-panel) 62%);
}

.page-about .about-data__label {
  display: block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-silver);
}

.page-about .about-data__num {
  display: block;
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: clamp(34px, 6vw, 56px);
  font-weight: 800;
  font-style: italic;
  line-height: 1;
  color: var(--data-gold);
  letter-spacing: -0.02em;
}

.page-about .about-data__desc {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-silver);
}

.page-about .about-data__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-data__links {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-data__links a {
  display: inline-block;
  font-size: 14px;
}

.page-about .about-data__figure {
  position: relative;
  margin: 44px 0 0;
  aspect-ratio: 8 / 10;
  max-height: 760px;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  clip-path: polygon(3% 0, 100% 0, 100% 96%, 97% 100%, 0 100%, 0 4%);
}

.page-about .about-data__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-mobile__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-mobile__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-mobile__features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-mobile__feature {
  position: relative;
  padding: 22px 24px 22px 28px;
  overflow: hidden;
  border: 1px solid var(--border-dim);
  background: rgba(22, 26, 36, 0.6);
}

.page-about .about-mobile__feature::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(var(--accent-red), var(--accent-orange));
}

.page-about .about-mobile__feature-num {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
}

.page-about .about-mobile__feature h3 {
  margin: 8px 0 8px;
  font-size: 18px;
  color: var(--text-bright);
}

.page-about .about-mobile__feature p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-silver);
}

.page-about .about-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .about-contact__note {
  margin: 0;
  padding-left: 20px;
  border-left: 3px solid var(--accent-orange);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-silver);
}

.page-about .about-contact__note p {
  margin: 0;
}

.page-about .about-contact__list {
  margin: 0;
  border: 1px solid var(--border-dim);
  background: var(--bg-panel);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
}

.page-about .about-contact__item {
  position: relative;
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 10px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-dim);
}

.page-about .about-contact__item:last-child {
  border-bottom: 0;
}

.page-about .about-contact__item dt {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--text-silver);
}

.page-about .about-contact__item dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--text-bright);
  word-break: break-all;
}

.page-about .about-contact__item::after {
  display: none;
  content: "可反馈";
  position: absolute;
  right: 14px;
  bottom: 14px;
  font-family: var(--font-data);
  font-size: 11px;
  color: transparent;
  opacity: 0;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-about .about-contact__item:hover::after,
.page-about .about-contact__item:focus-within::after {
  color: var(--accent-orange);
  opacity: 1;
}

.page-about .about-contact__footer {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-dim);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-silver);
}

.page-about .about-contact__footer a {
  font-size: 14px;
}

@media (min-width: 640px) {
  .page-about .about-origin__facts {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-data__stats {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-mobile__features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-panel__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-mobile__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-contact__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-contact__item::after {
    display: block;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 56px;
    padding-top: 64px;
    padding-bottom: 88px;
  }

  .page-about .about-hero__figure {
    aspect-ratio: 9 / 10;
    max-height: 680px;
    width: 100%;
  }

  .page-about .page-about__body {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 132px;
    align-self: start;
    display: block;
    padding: 56px 0 0;
    border-top: 2px solid var(--border-dim);
  }

  .page-about .about-rail__nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    display: block;
    width: 100%;
    padding: 10px 0 10px 16px;
    text-align: left;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
  }

  .page-about .about-rail__link:hover {
    border-left-color: var(--accent-orange);
    background: transparent;
  }

  .page-about .about-rail__link.is-active {
    border-left-color: var(--accent-red);
    color: var(--accent-orange);
    background: transparent;
  }

  .page-about .about-section {
    padding: 72px 0;
  }

  .page-about .about-data__figure {
    margin-top: 48px;
  }
}