.page-about {
  --about-head: Impact, "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-mono: "Courier New", Courier, monospace;
  position: relative;
  overflow: hidden;
  padding-bottom: 40px;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    radial-gradient(circle at 82% 6%, rgba(181, 55, 242, 0.12), transparent 24rem),
    radial-gradient(circle at 8% 38%, rgba(0, 229, 255, 0.05), transparent 20rem);
  background-size: 6px 6px, auto, auto;
  background-repeat: repeat, no-repeat, no-repeat;
  color: var(--text-main);
}
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}
.page-about .breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 22px 20px 0;
  font-family: var(--about-mono);
  font-size: 13px;
}
.page-about .breadcrumb a {
  color: var(--electric-blue);
  text-decoration: none;
}
.page-about .breadcrumb-sep {
  color: var(--text-faint);
  margin: 0 6px;
}
.page-about .about-hero {
  position: relative;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 58px 20px 50px;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 30%;
  right: -8%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(181, 55, 242, 0.2), transparent 66%);
  filter: blur(20px);
  pointer-events: none;
}
.page-about .about-hero-kicker {
  display: inline-block;
  font-family: var(--about-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon-purple);
  border: 1px solid var(--line-strong);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  transform: rotate(-1.5deg);
}
.page-about .about-hero h1 {
  font-family: var(--about-head);
  font-weight: 900;
  font-size: clamp(30px, 5.5vw, 60px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 26px 0 18px;
  max-width: 900px;
  text-shadow: 3px 3px 0 rgba(181, 55, 242, 0.18);
}
.page-about .about-hero-lead {
  max-width: 760px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
  border-left: 3px solid var(--neon-purple);
  padding-left: 18px;
  margin: 0;
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}
.page-about .about-hero-meta span {
  font-family: var(--about-mono);
  font-size: 13px;
  padding: 8px 14px;
  border: 1px dashed rgba(240, 230, 210, 0.25);
  border-radius: var(--radius-md);
  background: rgba(31, 27, 36, 0.5);
}
.page-about .about-hero-meta strong {
  color: var(--laser-green);
  font-size: 16px;
  margin-right: 4px;
}
.page-about .about-hero-note {
  display: none;
}
.page-about .page-section {
  position: relative;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 70px 20px 30px;
}
.page-about .section-mark {
  display: inline-block;
  font-family: var(--about-mono);
  font-size: 14px;
  color: var(--neon-purple);
  letter-spacing: 0.1em;
  margin: 0 0 8px;
  border: 1px solid var(--line-faded);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
}
.page-about .page-section h2 {
  font-family: var(--about-head);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.2;
  margin: 14px 0 12px;
  letter-spacing: 0.02em;
}
.page-about .about-rotate-note {
  display: inline-block;
  font-family: var(--about-mono);
  font-size: 12px;
  color: var(--text-faint);
  transform: rotate(-4deg);
  letter-spacing: 0.12em;
  margin-left: 10px;
  vertical-align: middle;
}
.page-about .section-intro {
  max-width: 680px;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 30px;
}
.page-about .about-timeline {
  position: relative;
  margin: 48px 0 0;
  padding-left: 30px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, #4d4456, #7a3c94 30%, var(--neon-purple) 62%, var(--electric-blue) 100%);
}
.page-about .about-timeline-item {
  position: relative;
  padding: 18px 0 32px 8px;
}
.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 3px solid var(--neon-purple);
  box-shadow: 0 0 16px rgba(181, 55, 242, 0.8);
}
.page-about .about-timeline-item-first::before {
  border-color: #8d8495;
  box-shadow: 0 0 10px rgba(141, 132, 149, 0.6);
}
.page-about .about-timeline-head {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}
.page-about .about-timeline-year {
  display: inline-block;
  font-family: var(--about-mono);
  color: var(--laser-green);
  font-size: 18px;
  letter-spacing: 0.04em;
  transform: rotate(-3deg);
}
.page-about .about-timeline-head h3 {
  font-family: var(--about-head);
  font-size: clamp(18px, 2.6vw, 28px);
  font-weight: 900;
  margin: 0;
}
.page-about .about-timeline-item p {
  margin: 12px 0 0;
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 760px;
}
.page-about .about-timeline-figure {
  margin: 18px 0 0;
}
.page-about .about-timeline-figure img {
  max-width: 560px;
  filter: grayscale(0.3) contrast(1.02);
}
.page-about .about-timeline-figure figcaption,
.page-about .about-dual-visual figcaption,
.page-about .about-archive-frame figcaption {
  font-family: var(--about-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  margin-top: 8px;
}
.page-about .about-dual-visual {
  margin: 0 0 32px;
}
.page-about .about-dual-visual img {
  box-shadow: 0 0 0 1px var(--line-faded), 0 24px 60px rgba(0, 0, 0, 0.4);
}
.page-about .about-dual-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-entry-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, rgba(31, 27, 36, 0.96), rgba(12, 10, 16, 0.98));
  border: 1px solid var(--line-faded);
  border-radius: var(--radius-md);
  padding: 30px 24px 26px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-entry-card::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -30%;
  width: 120px;
  height: 200px;
  background: linear-gradient(180deg, rgba(181, 55, 242, 0.2), transparent);
  transform: rotate(24deg);
  pointer-events: none;
}
.page-about .about-entry-tag {
  display: inline-block;
  font-family: var(--about-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}
.page-about .about-entry-card h3 {
  font-family: var(--about-head);
  font-size: 22px;
  font-weight: 900;
  margin: 0 0 10px;
}
.page-about .about-entry-card p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
  margin: 0 0 18px;
}
.page-about .about-entry-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--electric-blue);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  text-decoration: none;
}
.page-about .about-entry-pc:hover {
  transform: translateY(-4px);
  border-color: var(--neon-purple);
  box-shadow: 0 0 30px rgba(181, 55, 242, 0.28);
}
.page-about .about-entry-hot:hover {
  transform: translateY(-4px);
  border-color: var(--electric-blue);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.24);
}
.page-about .about-archive-frame {
  margin: 0 0 30px;
}
.page-about .about-archive-frame img {
  box-shadow: 0 0 0 1px rgba(204, 255, 0, 0.2), 0 26px 60px rgba(0, 0, 0, 0.45);
}
.page-about .about-archive-metrics {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-about .about-archive-metrics li {
  font-size: 14px;
  color: var(--text-dim);
  background: rgba(31, 27, 36, 0.6);
  border: 1px solid var(--line-faded);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  line-height: 1.5;
}
.page-about .about-archive-metrics strong {
  display: block;
  color: var(--laser-green);
  font-family: var(--about-mono);
  font-size: 24px;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}
.page-about .about-archive-note {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
  border-left: 3px solid var(--blood-red);
  padding-left: 16px;
  max-width: 720px;
}
.page-about .about-principles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 26px;
}
.page-about .about-principle {
  position: relative;
  background: rgba(31, 27, 36, 0.5);
  border: 1px solid var(--line-faded);
  border-radius: var(--radius-md);
  padding: 26px 22px 20px;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.page-about .about-principle:hover {
  border-color: rgba(161, 20, 36, 0.65);
  background: rgba(31, 27, 36, 0.8);
}
.page-about .about-principle-num {
  font-family: var(--about-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--blood-red);
}
.page-about .about-principle h3 {
  font-family: var(--about-head);
  font-size: 20px;
  font-weight: 900;
  margin: 8px 0 10px;
}
.page-about .about-principle p {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}
.page-about .about-next {
  padding-bottom: 70px;
}
.page-about .about-next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}
.page-about .about-next-link {
  display: block;
  padding: 18px 22px;
  border: 1px solid var(--line-faded);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 700;
  background: linear-gradient(120deg, rgba(181, 55, 242, 0.1), rgba(0, 229, 255, 0.06));
  text-decoration: none;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}
.page-about .about-next-link:hover {
  border-color: var(--neon-purple);
  background: linear-gradient(120deg, rgba(181, 55, 242, 0.22), rgba(0, 229, 255, 0.12));
  transform: translateX(6px);
}
@media (prefers-reduced-motion: no-preference) {
  .page-about .about-hero {
    animation: aboutFadeUp 0.7s ease both;
  }
  .page-about .about-timeline-item {
    animation: aboutRise 0.7s ease both;
  }
  .page-about .about-timeline-item:nth-child(2) {
    animation-delay: 0.1s;
  }
  .page-about .about-timeline-item:nth-child(3) {
    animation-delay: 0.2s;
  }
  .page-about .about-timeline-item:nth-child(4) {
    animation-delay: 0.3s;
  }
}
@keyframes aboutFadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes aboutRise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 90px 24px 72px;
  }
  .page-about .about-hero-note {
    display: block;
    position: absolute;
    right: 12px;
    bottom: 44px;
    font-family: var(--about-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--text-faint);
    writing-mode: vertical-rl;
  }
  .page-about .page-section {
    padding: 80px 24px 40px;
  }
  .page-about .about-dual-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .page-about .about-archive-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-principles-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .page-about .about-next-links {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 1080px) {
  .page-about .about-principles-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-timeline-item p {
    max-width: 820px;
  }
  .page-about .about-dual-visual img {
    max-height: 420px;
    object-fit: cover;
  }
}