.page-about {
  --abt-bg-panel: #1a0b26;
  --abt-bg-panel-2: #2a0d2c;
  --abt-bg-panel-3: #210d31;
  --abt-border: #5a2a5e;
  --abt-border-soft: rgba(255, 0, 204, .22);
  --abt-amber: #ffb347;
  --abt-cyan: #00e5ff;
  --abt-lime: #f9f871;
  --abt-pink: #ff00cc;
  --abt-purple: #b967ff;
  --abt-green: #34e89e;
  --abt-red: #ff6b6b;
  --abt-text: #ece5f8;
  --abt-sub: #a58fbf;
  --abt-mono: 'Courier New', ui-monospace, monospace;
  --abt-shadow: 8px 8px 0 rgba(0, 0, 0, .45);
  position: relative;
  background:
    radial-gradient(ellipse at 15% 0%, rgba(185, 103, 255, .13) 0%, transparent 38%),
    radial-gradient(ellipse at 90% 18%, rgba(255, 0, 204, .08) 0%, transparent 30%),
    linear-gradient(180deg, #150a1e 0%, #110a18 28%, #1c0a24 58%, #120919 100%);
  color: var(--abt-text);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  line-height: 1.65;
  overflow-x: clip;
}
.page-about__wrap {
  width: min(100%, 1440px);
  margin-inline: auto;
  padding: 0 clamp(16px, 4vw, 56px) 80px;
  position: relative;
}

/* ===== Hero ===== */
.page-about__hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
  padding: 56px 0 30px;
  position: relative;
  border-bottom: 3px solid var(--abt-border);
  margin-bottom: 0;
}
.page-about__hero-inner {
  max-width: 920px;
  position: relative;
  z-index: 2;
}
.page-about__hero-inner .c-kicker {
  margin-bottom: 14px;
}
.page-about__hero h1 {
  font-family: var(--font-head, Impact, sans-serif);
  font-size: clamp(2rem, 4.6vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--abt-text);
  text-shadow: 0 0 0 #000, 4px 4px 0 rgba(255, 0, 204, .25);
  margin: 0 0 18px;
  border-left: 6px solid var(--abt-pink);
  padding-left: clamp(14px, 2.4vw, 26px);
}
.page-about__hero-desc {
  font-size: clamp(.95rem, 1.2vw, 1.05rem);
  color: var(--abt-sub);
  max-width: 780px;
  margin: 0 0 20px;
  border-left: 3px solid rgba(255, 179, 71, .42);
  padding-left: clamp(14px, 2.4vw, 26px);
}
.page-about__hero-stat {
  position: relative;
  font-family: var(--abt-mono);
  font-size: clamp(4.5rem, 10vw, 8.5rem);
  font-weight: 700;
  line-height: .85;
  color: transparent;
  -webkit-text-stroke: 2px rgba(255, 0, 204, .3);
  text-shadow: none;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  transform: rotate(-6deg) translateY(8px);
  letter-spacing: -0.06em;
}
.page-about__hero-stat span {
  display: block;
  position: relative;
}
.page-about__hero-stat span::after {
  content: 'TOTAL INDEXED';
  position: absolute;
  left: 4px;
  top: 58%;
  font-size: .78rem;
  font-family: var(--font-body);
  letter-spacing: .34em;
  color: var(--abt-amber);
  -webkit-text-stroke: 0;
  white-space: nowrap;
  transform: rotate(6deg);
}
.c-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--abt-mono);
  font-size: .82rem;
  color: var(--abt-sub);
  margin-top: 8px;
}
.c-breadcrumbs .c-crumb {
  color: var(--abt-cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s, color .2s;
  padding-bottom: 2px;
  letter-spacing: .06em;
}
.c-breadcrumbs .c-crumb:hover {
  border-bottom-color: var(--abt-cyan);
  color: var(--abt-lime);
}
.c-breadcrumbs .c-crumb__sep {
  color: var(--abt-pink);
  font-weight: 700;
}
.c-breadcrumbs .c-crumb__current {
  color: var(--abt-text);
  background: rgba(255, 0, 204, .13);
  padding: 2px 10px;
  border: 1px solid rgba(255, 0, 204, .35);
}

/* ===== Section base ===== */
.page-about__section {
  padding: 58px 0 10px;
  position: relative;
}
.page-about__section::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--abt-pink) 0%, var(--abt-amber) 18%, transparent 65%);
  margin-bottom: 38px;
  box-shadow: 0 0 18px rgba(255, 0, 204, .28);
}
.page-about__section-head {
  max-width: 920px;
  margin-bottom: 34px;
}
.page-about__section-head h2 {
  font-family: var(--font-head, Impact, sans-serif);
  font-size: clamp(1.45rem, 2.8vw, 2.2rem);
  line-height: 1.14;
  color: var(--abt-text);
  margin: 10px 0 14px;
  letter-spacing: .03em;
}
.page-about__section-head p:last-child {
  color: var(--abt-sub);
  font-size: .98rem;
  margin: 0;
  max-width: 70ch;
}
.page-about__section .c-kicker {
  margin-bottom: 4px;
}
.c-kicker--pink {
  color: var(--abt-pink);
}

/* ===== Classification table ===== */
.page-about__cat-table-wrap {
  position: relative;
  background: var(--abt-bg-panel);
  border: 3px solid var(--abt-border);
  border-radius: 14px;
  box-shadow: var(--abt-shadow);
  overflow: hidden;
  margin-bottom: 28px;
}
.page-about__cat-table-wrap::before {
  content: '六分区 · 2847条';
  position: absolute;
  top: 10px;
  right: 14px;
  font-family: var(--abt-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--abt-lime);
  background: rgba(249, 248, 113, .08);
  border: 1px solid rgba(249, 248, 113, .24);
  padding: 3px 10px;
  z-index: 2;
}
.c-table.page-about__cat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
.page-about__cat-table thead th {
  background: #311240;
  color: var(--abt-text);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .84rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: 16px 14px;
  border-bottom: 3px solid var(--abt-pink);
  text-align: left;
  white-space: nowrap;
}
.page-about__cat-table tbody td {
  padding: 15px 14px;
  border-bottom: 1px solid rgba(185, 103, 255, .13);
  vertical-align: top;
  color: var(--abt-text);
}
.page-about__cat-table tbody tr {
  transition: background .2s ease;
  cursor: default;
}
.page-about__cat-table tbody tr:hover {
  background: rgba(255, 0, 204, .07);
}
.page-about__cat-table tbody tr:last-child td {
  border-bottom: none;
}
.page-about__cat-num {
  font-family: var(--abt-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--abt-amber);
  white-space: nowrap;
}
.page-about__cat-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 10px currentColor;
}
.page-about__cat-dot--type { background: var(--abt-lime); color: var(--abt-lime); }
.page-about__cat-dot--rule { background: var(--abt-amber); color: var(--abt-amber); }
.page-about__cat-dot--term { background: var(--abt-cyan); color: var(--abt-cyan); }
.page-about__cat-dot--ver { background: var(--abt-purple); color: var(--abt-purple); }
.page-about__cat-dot--skill { background: var(--abt-green); color: var(--abt-green); }
.page-about__cat-dot--log { background: var(--abt-pink); color: var(--abt-pink); }
.page-about__cat-row--hot td:first-child {
  border-left: 4px solid var(--abt-amber);
}
.page-about__cat-row td[data-label="分区"] {
  font-weight: 600;
  color: var(--abt-text);
}
.page-about__cat-row td[data-label="收录口径"] {
  color: var(--abt-sub);
  font-size: .9rem;
  max-width: 280px;
}
.page-about__cat-row td[data-label="子目录覆盖"] {
  color: var(--abt-text);
  max-width: 300px;
}

.page-about__cat-note {
  background: linear-gradient(135deg, rgba(255, 179, 71, .09) 0%, rgba(255, 0, 204, .08) 50%, rgba(185, 103, 255, .06) 100%);
  border: 2px solid var(--abt-border-soft);
  border-radius: 12px;
  padding: 24px 26px;
  margin-bottom: 20px;
}
.page-about__cat-note p {
  margin: 0 0 14px;
  color: var(--abt-text);
  font-size: .95rem;
}
.page-about__zone-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about__zone-tags .c-tag {
  transition: transform .16s ease, background .16s ease, color .16s ease;
}
.page-about__zone-tags .c-tag:hover {
  transform: translateY(-3px) rotate(-1deg);
}

/* ===== Scope section ===== */
.page-about__section--scope {
  background:
    radial-gradient(circle at 82% 34%, rgba(0, 229, 255, .06) 0%, transparent 28%),
    linear-gradient(180deg, transparent 0%, rgba(43, 15, 59, .6) 30%, rgba(77, 18, 38, .45) 100%);
  padding-top: 42px;
  margin-top: 20px;
}
.page-about__scope-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 40px;
  align-items: start;
}
.page-about__scope-text .page-about__section-head {
  margin-bottom: 26px;
}
.page-about__scope-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.page-about__scope-item {
  background: var(--abt-bg-panel-2);
  border: 2px solid rgba(255, 0, 204, .18);
  border-radius: 12px;
  padding: 20px 18px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, transform .2s;
}
.page-about__scope-item:hover {
  border-color: rgba(255, 0, 204, .5);
  transform: translateY(-3px);
}
.page-about__scope-no {
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--abt-mono);
  font-size: 2rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 179, 71, .26);
  line-height: 1;
}
.page-about__scope-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--abt-amber);
  margin: 0 0 8px;
  letter-spacing: .04em;
}
.page-about__scope-item p {
  margin: 0;
  font-size: .9rem;
  color: var(--abt-sub);
  line-height: 1.6;
}
.page-about__scope-fig {
  background: var(--abt-bg-panel-3);
  border: 3px solid var(--abt-border);
  border-radius: 14px;
  padding: 16px;
  margin: 0;
  box-shadow: var(--abt-shadow);
  position: sticky;
  top: 24px;
}
.page-about__scope-fig img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(255, 0, 204, .25);
  margin-bottom: 12px;
}
.page-about__scope-fig figcaption {
  font-size: .82rem;
  color: var(--abt-cyan);
  letter-spacing: .06em;
  padding-left: 6px;
  border-left: 3px solid var(--abt-cyan);
}

/* ===== Batch section ===== */
.page-about__section--batch {
  margin-top: 10px;
}
.page-about__batch-flow {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 46px;
  padding: 28px 18px;
  background: #1d0b29;
  border: 2px solid rgba(185, 103, 255, .22);
  border-radius: 14px;
}
.page-about__batch-node {
  flex: 0 1 calc(20% - 20px);
  min-width: 150px;
  padding: 18px 12px;
  text-align: center;
  position: relative;
  background: #261039;
  border: 2px solid rgba(185, 103, 255, .2);
  border-radius: 10px;
}
.page-about__batch-node--start {
  border-color: rgba(0, 229, 255, .45);
}
.page-about__batch-node--start .page-about__batch-node-icon {
  color: var(--abt-cyan);
  border-color: var(--abt-cyan);
}
.page-about__batch-node--end {
  border-color: rgba(255, 179, 71, .5);
}
.page-about__batch-node--end .page-about__batch-node-icon {
  color: var(--abt-amber);
  border-color: var(--abt-amber);
}
.page-about__batch-node-icon {
  display: inline-block;
  font-family: var(--abt-mono);
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--abt-purple);
  border: 2px solid var(--abt-purple);
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 10px;
  background: rgba(185, 103, 255, .08);
  box-shadow: 0 0 14px rgba(185, 103, 255, .12);
}
.page-about__batch-node p {
  margin: 0;
  font-size: .86rem;
  color: var(--abt-sub);
}
.page-about__batch-line {
  flex: 1 1 0;
  min-width: 40px;
  height: 4px;
  align-self: center;
  background: repeating-linear-gradient(90deg, rgba(255, 0, 204, .5) 0 6px, transparent 6px 12px);
  box-shadow: 0 0 8px rgba(255, 0, 204, .18);
  margin-inline: 4px;
}

.page-about__version {
  background: linear-gradient(135deg, rgba(45, 5, 45, .5) 0%, rgba(90, 6, 30, .4) 100%);
  border: 2px solid rgba(255, 179, 71, .2);
  border-radius: 16px;
  padding: 30px 28px;
  margin-bottom: 24px;
  position: relative;
}
.page-about__version-head h3 {
  font-size: 1.2rem;
  margin: 0 0 6px;
  color: var(--abt-amber);
  letter-spacing: .06em;
}
.page-about__version-head p {
  margin: 0 0 18px;
  color: var(--abt-sub);
  font-size: .9rem;
}
.page-about__version-img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid rgba(255, 179, 71, .25);
  display: block;
  margin-bottom: 22px;
}
.page-about__version-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 26px;
}
.page-about__version-list li {
  position: relative;
  font-size: .9rem;
  color: var(--abt-text);
  background: rgba(255, 255, 255, .025);
  border-left: 3px solid rgba(255, 0, 204, .4);
  padding: 12px 12px 12px 16px;
  border-radius: 0 8px 8px 0;
}
.page-about__version-no {
  display: inline-block;
  font-family: var(--abt-mono);
  font-weight: 700;
  font-size: .82rem;
  color: var(--abt-lime);
  background: rgba(249, 248, 113, .08);
  border: 1px solid rgba(249, 248, 113, .22);
  padding: 1px 8px;
  border-radius: 4px;
  margin-right: 8px;
  letter-spacing: .08em;
}

/* ===== Tools section ===== */
.page-about__section--tools {
  margin-top: 20px;
}
.page-about__tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 36px;
}
.page-about__tool-card {
  background: #211232;
  border: 2px solid rgba(255, 0, 204, .15);
  border-radius: 12px;
  padding: 24px 22px 20px;
  position: relative;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  overflow: hidden;
}
.page-about__tool-card:hover {
  transform: translateY(-5px) rotate(-.5deg);
  border-color: rgba(255, 0, 204, .55);
  box-shadow: 0 0 24px rgba(255, 0, 204, .08);
}
.page-about__tool-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, transparent 40%, rgba(255, 0, 204, .08) 100%);
  border-bottom-left-radius: 12px;
}
.page-about__tool-card img {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(0, 229, 255, .28);
  margin-bottom: 16px;
  display: block;
}
.page-about__tool-card h3 {
  font-size: 1.06rem;
  margin: 0 0 8px;
  color: var(--abt-text);
  letter-spacing: .04em;
}
.page-about__tool-card p {
  margin: 0 0 14px;
  font-size: .87rem;
  color: var(--abt-sub);
  line-height: 1.6;
}
.page-about__tool-tag {
  display: inline-block;
  font-family: var(--abt-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--abt-cyan);
  background: rgba(0, 229, 255, .07);
  border: 1px solid rgba(0, 229, 255, .25);
  padding: 3px 10px;
  border-radius: 4px;
}
.page-about__tool-card--hot {
  border-color: rgba(255, 179, 71, .5);
  background: linear-gradient(135deg, #2a1024 0%, #311732 100%);
}
.page-about__tool-card--hot .page-about__tool-tag {
  color: var(--abt-amber);
  border-color: rgba(255, 179, 71, .4);
  background: rgba(255, 179, 71, .06);
}

.page-about__indexbar-wrap {
  background: #1e0b26;
  border: 2px solid rgba(0, 229, 255, .2);
  border-radius: 14px;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.page-about__indexbar-wrap > div:first-child {
  flex: 0 0 auto;
}
.page-about__indexbar-wrap h3 {
  margin: 0 0 2px;
  font-size: 1.02rem;
  color: var(--abt-cyan);
}
.page-about__indexbar-wrap p {
  margin: 0;
  font-size: .82rem;
  color: var(--abt-sub);
}
.page-about__indexbar {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  flex: 1 1 60%;
}
.page-about__indexbar .c-indexbar__link {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0 7px;
  font-family: var(--abt-mono);
  font-size: .8rem;
  color: var(--abt-text);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 4px;
  background: rgba(255, 255, 255, .03);
  transition: background .16s, color .16s, transform .16s, border-color .16s;
}
.page-about__indexbar .c-indexbar__link:hover {
  background: var(--abt-cyan);
  color: #110a18;
  border-color: var(--abt-cyan);
  font-weight: 700;
  transform: translateY(-2px);
  box-shadow: 0 0 16px rgba(0, 229, 255, .3);
}

/* ===== Entry / CTA ===== */
.page-about__section--entry {
  margin-top: 28px;
}
.page-about__entry-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  background:
    radial-gradient(circle at 80% 50%, rgba(255, 0, 204, .12) 0%, transparent 30%),
    linear-gradient(120deg, #2f0a3d 0%, #4d1226 100%);
  border: 3px solid rgba(255, 0, 204, .25);
  border-radius: 16px;
  padding: 42px clamp(22px, 4vw, 52px);
  box-shadow: var(--abt-shadow);
}
.page-about__entry-inner > div:first-child {
  max-width: 640px;
}
.page-about__entry-inner .c-kicker {
  margin-bottom: 8px;
}
.page-about__entry-inner h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  margin: 8px 0 12px;
  color: var(--abt-text);
  letter-spacing: .04em;
  font-family: var(--font-head, Impact, sans-serif);
}
.page-about__entry-inner p {
  margin: 0;
  color: var(--abt-sub);
  font-size: .96rem;
}
.page-about__entry-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex: 0 0 auto;
}
.page-about__entry-actions .c-btn {
  display: inline-block;
  background: var(--abt-amber);
  color: #1a0a10;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .95rem;
  text-decoration: none;
  padding: 12px 24px;
  border: 3px solid var(--abt-amber);
  border-radius: 8px;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .3);
  transition: transform .16s, box-shadow .16s, background .16s;
}
.page-about__entry-actions .c-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .46);
}
.page-about__entry-actions .c-btn--ghost {
  background: transparent;
  color: var(--abt-cyan);
  border-color: var(--abt-cyan);
}
.page-about__entry-actions .c-btn--ghost:hover {
  background: rgba(0, 229, 255, .09);
  box-shadow: 4px 4px 0 rgba(0, 229, 255, .1);
}

/* ===== Section divider variants ===== */
.page-about__section--batch .page-about__section-head,
.page-about__section--tools .page-about__section-head {
  position: relative;
}
.page-about__section--batch .page-about__section-head::after,
.page-about__section--tools .page-about__section-head::after {
  content: '';
  position: absolute;
  right: 0;
  top: 18px;
  width: 140px;
  height: 40px;
  background:
    repeating-linear-gradient(135deg, rgba(255, 0, 204, .18) 0 2px, transparent 2px 8px);
  clip-path: polygon(0 85%, 85% 0, 100% 0, 100% 15%, 15% 100%, 0 100%);
  opacity: .5;
  pointer-events: none;
}

/* ===== Responsive ===== */
@media (min-width: 980px) {
  .page-about__tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 979px) {
  .page-about__scope-grid {
    grid-template-columns: 1fr;
  }
  .page-about__scope-fig {
    position: static;
  }
  .page-about__tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about__hero-stat {
    display: none;
  }
  .page-about__version-list {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 639px) {
  .page-about__wrap {
    padding: 0 14px 60px;
  }
  .page-about__hero {
    grid-template-columns: 1fr;
    padding-top: 38px;
  }
  .page-about__hero h1 {
    font-size: 1.75rem;
    border-left-width: 4px;
  }
  .page-about__section {
    padding-top: 42px;
  }
  .page-about__scope-list {
    grid-template-columns: 1fr;
  }
  .page-about__tools-grid {
    grid-template-columns: 1fr;
  }
  .page-about__batch-flow {
    flex-direction: column;
    gap: 16px;
    padding: 20px 14px;
  }
  .page-about__batch-node {
    flex-basis: auto;
    width: 100%;
  }
  .page-about__batch-line {
    min-width: 4px;
    min-height: 24px;
    width: 4px;
    margin: 0 auto;
    background: repeating-linear-gradient(180deg, rgba(255, 0, 204, .5) 0 6px, transparent 6px 12px);
  }
  .page-about__cat-table-wrap {
    overflow-x: auto;
  }
  .c-table.page-about__cat-table {
    min-width: 640px;
  }
  .page-about__entry-inner {
    flex-direction: column;
  }
  .page-about__entry-actions {
    flex-direction: column;
    width: 100%;
  }
  .page-about__entry-actions .c-btn {
    text-align: center;
  }
  .page-about__indexbar-wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }
}