.page-about {
  padding: 24px 16px 64px;
  overflow-x: hidden;
}

.page-about .breadcrumb {
  max-width: var(--container);
  margin: 0 auto 24px;
  padding: 8px 4px;
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

.page-about .breadcrumb a {
  color: var(--accent-cyan);
  text-decoration: none;
  margin-right: 6px;
}

.page-about .breadcrumb a:hover {
  color: var(--accent-pink);
}

/* ===== Hero ===== */
.about-hero {
  position: relative;
  max-width: var(--container);
  margin: 0 auto 36px;
  padding: 32px 18px 28px;
  background: linear-gradient(135deg, #1e1e25 0%, #14141a 55%, #1b1030 100%);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.about-hero::before {
  content: "INDEX";
  position: absolute;
  top: 8px;
  right: 6px;
  font-family: var(--font-head);
  font-size: clamp(60px, 18vw, 180px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 229, 255, 0.25);
  pointer-events: none;
  white-space: nowrap;
  z-index: 0;
}

.about-hero__inner,
.about-hero__stats {
  position: relative;
  z-index: 1;
}

.about-hero__label {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--accent-pink);
  color: var(--accent-pink);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  margin-bottom: 18px;
  background: rgba(255, 0, 170, 0.08);
}

.about-hero__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.08;
  color: #fff;
  letter-spacing: 0.01em;
  max-width: 12em;
}

.about-hero__subtitle {
  display: inline-block;
  margin: 0 0 14px;
  padding: 2px 0 2px 12px;
  border-left: 4px solid var(--accent-cyan);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.about-hero__lead {
  margin: 0 0 24px;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.about-hero__lead strong {
  color: var(--card-yellow);
  font-weight: 700;
}

.about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-tile {
  padding: 16px 14px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  color: #161616;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: default;
}

.stat-tile:hover,
.stat-tile:focus {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.stat-tile--yellow {
  background: var(--card-yellow);
}

.stat-tile--blue {
  background: var(--card-blue);
}

.stat-tile--rose {
  background: var(--card-rose);
}

.stat-tile--green {
  background: var(--card-green);
}

.stat-tile__num {
  display: block;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-tile__label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.stat-tile__hint {
  display: block;
  font-size: 11px;
  line-height: 1.5;
  opacity: 0.72;
}

/* ===== 区块通用 ===== */
.page-about .section-block {
  max-width: var(--container);
  margin: 0 auto 36px;
  padding: 28px 18px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.section-block--orange {
  background: var(--section-orange);
}

.section-block--green {
  background: var(--section-green);
}

.section-block--purple {
  background: var(--section-purple);
}

.section-block--red {
  background: var(--section-red);
}

.page-about .section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 5vw, 34px);
  letter-spacing: 0.02em;
  color: #fff;
}

.page-about .section-link {
  color: var(--accent-cyan);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
}

.page-about .section-link:hover {
  color: var(--accent-pink);
}

/* ===== 本站是什么 ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.about-intro__heading {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: clamp(20px, 4vw, 28px);
  color: #fff;
  line-height: 1.3;
}

.about-intro__copy {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
}

.about-intro__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.about-intro .btn {
  display: inline-block;
  margin-top: 4px;
}

.about-intro__fig {
  margin: 0;
  border: 2px solid #160c06;
  outline: 1px solid rgba(0, 0, 0, 0.4);
  outline-offset: 4px;
  padding: 4px;
  background: #0e0e12;
}

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

/* ===== 收录规模 ===== */
.scale-lead {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.85);
}

.scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.scale-card {
  border-radius: var(--radius);
  padding: 18px 16px;
  border: 2px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.scale-card:hover,
.scale-card:focus {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
}

.scale-card--film {
  background: var(--section-orange);
}

.scale-card--drama {
  background: var(--section-green);
}

.scale-card--anime {
  background: var(--section-purple);
}

.scale-card--theme {
  background: var(--section-red);
}

.scale-card__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.scale-card__name {
  font-family: var(--font-head);
  font-size: 18px;
}

.scale-card__num {
  font-size: 26px;
  font-weight: 900;
  color: var(--card-yellow);
}

.scale-card--drama .scale-card__num {
  color: var(--card-green);
}

.scale-card--anime .scale-card__num {
  color: #cf7fe8;
}

.scale-card--theme .scale-card__num {
  color: var(--accent-pink);
}

.scale-card__tags {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
}

.scale-sub {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.scale-sub__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px dashed rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
}

.scale-sub__name {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
}

.scale-sub__num {
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-cyan);
}

.scale-fig {
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
  background: #081c14;
  aspect-ratio: 3/1;
}

.scale-fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 双维度索引 ===== */
.matrix-head__text {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .matrix-table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(0, 0, 0, 0.22);
  font-size: 13px;
  min-width: 420px;
}

.page-about .matrix-table th,
.page-about .matrix-table td {
  padding: 12px 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  text-align: center;
  transition: background 0.2s ease;
}

.page-about .matrix-table thead th {
  background: rgba(0, 0, 0, 0.3);
  color: var(--accent-cyan);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .matrix-table tbody th {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  text-align: left;
  font-weight: 700;
}

.page-about .matrix-table tbody tr:hover th {
  background: rgba(0, 229, 255, 0.14);
}

.page-about .matrix-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.05);
}

.matrix-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.matrix-dot::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.matrix-dot--full {
  background: rgba(1, 215, 88, 0.18);
  color: #4df48a;
}

.matrix-dot--part {
  background: rgba(251, 212, 28, 0.18);
  color: #ffdf4d;
}

.matrix-dot--few {
  background: rgba(255, 46, 126, 0.18);
  color: #ff7bb0;
}

.matrix-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
}

.matrix-foot__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

.matrix-foot__item .matrix-dot {
  padding: 0;
  background: none;
}

.matrix-foot__item .matrix-dot::before {
  width: 10px;
  height: 10px;
}

.tag-cloud {
  margin-top: 22px;
  padding: 16px;
  border: 1px dashed rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.16);
}

.tag-cloud__title {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.tag-cloud__body {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-about .tag-cloud .tag-cloud__lg {
  font-size: 20px;
  padding: 8px 16px;
}

.page-about .tag-cloud .tag-cloud__md {
  font-size: 15px;
  padding: 6px 12px;
}

.page-about .tag-cloud .tag-cloud__sm {
  font-size: 12px;
  padding: 4px 10px;
}

/* ===== 更新机制 ===== */
.updates-lead {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.timeline {
  position: relative;
  margin: 0 0 20px;
  padding-left: 18px;
  border-left: 2px solid rgba(255, 255, 255, 0.25);
}

.timeline__item {
  position: relative;
  margin-bottom: 12px;
  background: rgba(0, 0, 0, 0.22);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.2);
}

.timeline__item:first-child::before {
  background: var(--card-green);
  box-shadow: 0 0 0 3px rgba(1, 215, 88, 0.25);
}

.timeline__item summary {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 14px;
  cursor: pointer;
  font-size: 13px;
}

.timeline__item summary::-webkit-details-marker {
  display: none;
}

.timeline__batch {
  font-weight: 900;
  font-size: 16px;
  color: #fff;
}

.timeline__count {
  font-weight: 700;
  color: var(--card-yellow);
}

.timeline__time {
  margin-left: auto;
  color: var(--text-dim);
  font-size: 12px;
}

.timeline__detail {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 12px 14px 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.16);
}

.timeline__version {
  margin-left: auto;
  font-size: 12px;
  color: var(--accent-pink);
}

.about-versions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 14px;
  background: rgba(0, 0, 0, 0.24);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.about-versions__title {
  font-size: 13px;
  color: var(--text-dim);
}

.about-versions__num {
  font-size: 22px;
  font-weight: 900;
  color: var(--accent-cyan);
}

.about-versions__note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

/* ===== 适配范围 ===== */
.page-about .about-devices {
  background: var(--bg-panel);
  border-color: var(--border-color);
}

.device-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 18px;
}

.device-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px 10px;
  background: var(--bg-panel2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-main);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.device-card:hover,
.device-card:focus {
  transform: translateY(-4px);
  border-color: var(--accent-cyan);
}

.device-card:nth-child(1) .device-card__icon {
  color: var(--card-yellow);
}

.device-card:nth-child(2) .device-card__icon {
  color: var(--card-green);
}

.device-card:nth-child(3) .device-card__icon {
  color: var(--card-blue);
}

.device-card:nth-child(4) .device-card__icon {
  color: var(--accent-pink);
}

.device-card__icon {
  width: 42px;
  height: 42px;
  margin-bottom: 8px;
}

.device-card__name {
  font-family: var(--font-head);
  font-size: 16px;
  margin-bottom: 6px;
}

.device-card__desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-dim);
}

.device-fig {
  margin: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0d0d12;
  aspect-ratio: 2/1;
}

.device-fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 引导区 ===== */
.about-cta {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.cta-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 18px 16px;
  border-radius: var(--radius);
  text-decoration: none;
  color: #161616;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-card:hover,
.cta-card:focus {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

.cta-card--yellow {
  background: var(--card-yellow);
}

.cta-card--blue {
  background: var(--card-blue);
}

.cta-card--rose {
  background: var(--card-rose);
}

.cta-card__main {
  font-family: var(--font-head);
  font-size: 20px;
}

.cta-card__sub {
  font-size: 12px;
  opacity: 0.78;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about {
    padding: 32px 32px 72px;
  }

  .about-hero {
    padding: 40px 32px 32px;
  }

  .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }

  .about-intro {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .scale-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .scale-sub {
    grid-template-columns: repeat(4, 1fr);
  }

  .device-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .about-cta {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-hero__title {
    font-size: clamp(34px, 5vw, 56px);
  }
}

@media (min-width: 1180px) {
  .page-about {
    padding-top: 40px;
  }

  .page-about .section-block {
    padding: 36px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
  }
}