.page-about {
  --ab-rail-w: 216px;
  --ab-gap: clamp(28px, 4vw, 56px);
  --ab-jade-soft: rgba(185, 255, 240, .06);
  background: var(--sk-bg);
  color: var(--sk-ink);
}

.page-about .ab-vh {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 7vw, 88px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--sk-line);
}

.page-about .ab-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .ab-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(680px 340px at 82% 12%, rgba(123, 77, 255, .32), transparent 68%),
    radial-gradient(520px 280px at 8% 92%, rgba(36, 224, 192, .16), transparent 70%),
    linear-gradient(180deg, rgba(6, 10, 28, .5) 0%, rgba(6, 10, 28, .92) 62%, var(--sk-bg) 100%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  max-width: 20ch;
  letter-spacing: -.01em;
  text-shadow: 0 0 26px rgba(123, 77, 255, .4);
}

.page-about .ab-hero__lead {
  margin-top: 18px;
  max-width: 62ch;
  color: var(--sk-ink);
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--sk-hair);
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-fact__num {
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: .04em;
  color: var(--sk-cyan);
  line-height: 1.1;
}

.page-about .ab-fact__label {
  font-size: 13px;
  color: var(--sk-mist);
}

/* ---------- 双栏骨架 ---------- */
.page-about .ab-layout {
  display: grid;
  gap: var(--ab-gap);
  padding: clamp(34px, 5vw, 64px) 0 clamp(48px, 7vw, 96px);
}

.page-about .ab-rail {
  align-self: start;
}

.page-about .ab-rail__label {
  margin: 0 0 12px;
}

.page-about .ab-rail__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-rail__list li {
  flex: 0 0 auto;
}

.page-about .ab-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--sk-mist);
  text-decoration: none;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: rgba(14, 23, 56, .5);
  transition: color .18s var(--sk-ease), border-color .18s var(--sk-ease), background-color .18s var(--sk-ease);
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--sk-jade);
  border-color: var(--sk-line-strong);
  background: rgba(123, 77, 255, .12);
}

.page-about .ab-rail__link[aria-current="true"] {
  color: var(--sk-ink);
  border-color: var(--sk-purple);
  box-shadow: 0 0 0 1px rgba(123, 77, 255, .35), 0 0 18px rgba(123, 77, 255, .25);
}

.page-about .ab-rail__num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sk-cyan);
}

/* ---------- 章节 ---------- */
.page-about .ab-body {
  min-width: 0;
}

.page-about .ab-chapter {
  scroll-margin-top: 96px;
  padding-bottom: clamp(34px, 5vw, 60px);
  margin-bottom: clamp(34px, 5vw, 60px);
  border-bottom: 1px solid var(--sk-line);
}

.page-about .ab-chapter:last-of-type {
  border-bottom: 0;
}

.page-about .ab-chapter:target .ab-chapter__num {
  -webkit-text-stroke-color: var(--sk-cyan);
}

.page-about .ab-chapter:target .ab-chapter__title {
  color: var(--sk-jade);
}

.page-about .ab-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .ab-chapter__num {
  flex: 0 0 auto;
  font-family: var(--sk-font-mono);
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1;
  letter-spacing: .06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--sk-purple);
}

@supports not (-webkit-text-stroke: 1px #000) {
  .page-about .ab-chapter__num {
    color: var(--sk-purple);
  }
}

.page-about .ab-chapter__title {
  margin: 0;
  text-wrap: balance;
}

.page-about .ab-chapter p {
  max-width: 40em;
  margin: 0 0 16px;
  color: var(--sk-ink);
  line-height: 1.75;
}

.page-about .ab-chapter p:last-child {
  margin-bottom: 0;
}

.page-about .ab-sub {
  margin: 32px 0 14px;
  color: var(--sk-jade);
}

/* ---------- 按钮行 ---------- */
.page-about .ab-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 同心环 ---------- */
.page-about .ab-rings {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(20px, 4vw, 44px);
  margin: 26px 0 30px;
  padding: 22px;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: linear-gradient(160deg, rgba(14, 23, 56, .85), rgba(6, 10, 28, .6));
}

.page-about .ab-rings svg {
  flex: 0 0 auto;
  width: min(240px, 62vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 0 14px rgba(123, 77, 255, .3));
}

.page-about .ab-rings__c {
  fill: none;
  stroke-width: 1.5;
}

.page-about .ab-rings__c--1 { stroke: var(--sk-cyan); opacity: .95; }
.page-about .ab-rings__c--2 { stroke: var(--sk-purple); opacity: .95; }
.page-about .ab-rings__c--3 { stroke: var(--sk-gold); opacity: .95; }

.page-about .ab-rings__core {
  fill: var(--sk-bg);
  stroke: var(--sk-line-strong);
  stroke-width: 1;
}

.page-about .ab-rings__cap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--sk-ink);
}

.page-about .ab-rings__cap span {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.page-about .ab-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.page-about .ab-dot--cyan { background: var(--sk-cyan); box-shadow: 0 0 10px rgba(36, 224, 192, .7); }
.page-about .ab-dot--purple { background: var(--sk-purple); box-shadow: 0 0 10px rgba(123, 77, 255, .7); }
.page-about .ab-dot--gold { background: var(--sk-gold); box-shadow: 0 0 10px rgba(216, 166, 87, .7); }

/* ---------- 会员档位标签页 ---------- */
.page-about .ab-tiers {
  margin-top: 8px;
}

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

.page-about .ab-tiers__btns .sk-tabs__btn {
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
  background: rgba(14, 23, 56, .55);
  color: var(--sk-mist);
  padding: 9px 16px;
  font-family: var(--sk-font-sans);
  font-size: 14px;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color .18s var(--sk-ease), border-color .18s var(--sk-ease), background-color .18s var(--sk-ease);
}

.page-about .ab-tiers__btns .sk-tabs__btn:hover {
  color: var(--sk-jade);
  border-color: var(--sk-line-strong);
}

.page-about .ab-tiers__btns .sk-tabs__btn[aria-selected="true"] {
  color: var(--sk-ink);
  border-color: var(--sk-purple);
  background: rgba(123, 77, 255, .18);
  box-shadow: inset 0 0 0 1px rgba(123, 77, 255, .35), 0 0 20px rgba(123, 77, 255, .22);
}

.page-about .ab-tierpanel__note {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--sk-mist);
}

/* ---------- 表格 ---------- */
.page-about .ab-tablewrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--sk-line);
  border-radius: var(--sk-radius);
}

.page-about .sk-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .sk-table th,
.page-about .sk-table td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--sk-hair);
  vertical-align: top;
}

.page-about .sk-table thead th {
  font-family: var(--sk-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sk-mist);
  text-transform: uppercase;
  background: rgba(14, 23, 56, .75);
  border-bottom: 1px solid var(--sk-line);
  white-space: nowrap;
}

.page-about .sk-table tbody th {
  font-weight: 500;
  color: var(--sk-jade);
  white-space: nowrap;
}

.page-about .sk-table tbody tr:nth-child(even) {
  background: var(--ab-jade-soft);
}

.page-about .sk-table tbody tr:hover {
  background: rgba(185, 255, 240, .12);
}

.page-about .sk-table tbody tr:last-child th,
.page-about .sk-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ab-table--data td {
  color: var(--sk-ink);
}

.page-about .ab-table--data .sk-mono {
  color: var(--sk-cyan);
}

/* ---------- 权益说明 ---------- */
.page-about .ab-notes {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--sk-hair);
}

.page-about .ab-notes li {
  padding: 14px 0;
  border-bottom: 1px solid var(--sk-hair);
  color: var(--sk-mist);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .ab-notes__k {
  display: inline-block;
  min-width: 84px;
  margin-right: 12px;
  color: var(--sk-orange);
  font-size: 13px;
  letter-spacing: .06em;
}

/* ---------- 数据筛选 ---------- */
.page-about .ab-filter {
  margin-top: 22px;
}

.page-about .sk-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .sk-filter__btn {
  border: 1px solid var(--sk-line);
  border-radius: 999px;
  background: transparent;
  color: var(--sk-mist);
  padding: 6px 15px;
  font-family: var(--sk-font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: color .18s var(--sk-ease), border-color .18s var(--sk-ease), background-color .18s var(--sk-ease);
}

.page-about .sk-filter__btn:hover {
  color: var(--sk-jade);
  border-color: var(--sk-line-strong);
}

.page-about .sk-filter__btn[aria-pressed="true"] {
  color: var(--sk-bg);
  border-color: var(--sk-cyan);
  background: var(--sk-cyan);
}

/* ---------- 查询场景 ---------- */
.page-about .ab-scenes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-scenes li {
  padding: 14px 0 14px 18px;
  border-bottom: 1px solid var(--sk-hair);
  border-left: 2px solid rgba(123, 77, 255, .45);
  margin-bottom: 10px;
  color: var(--sk-ink);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .ab-scenes__k {
  display: inline-block;
  min-width: 78px;
  margin-right: 10px;
  color: var(--sk-cyan);
  font-size: 13px;
  letter-spacing: .06em;
}

/* ---------- 内容生产错层 ---------- */
.page-about .ab-split {
  display: grid;
  gap: 24px;
  margin-top: 6px;
}

.page-about .ab-split__media {
  margin: 0;
}

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

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
  margin: 24px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--sk-hair);
}

.page-about .ab-stats__n {
  display: block;
  font-size: 24px;
  letter-spacing: .04em;
  color: var(--sk-cyan);
  line-height: 1.1;
}

.page-about .ab-stats__t {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  color: var(--sk-mist);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-grid-cards {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .ab-eco {
  padding: 20px;
}

.page-about .ab-eco__n {
  margin: 14px 0 8px;
  font-size: 30px;
  letter-spacing: .04em;
  color: var(--sk-ink);
  line-height: 1.1;
}

.page-about .ab-eco__t {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--sk-mist);
}

/* ---------- 西安基地横图 ---------- */
.page-about .ab-xian {
  margin: 24px 0;
}

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

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--sk-line-strong);
  border-radius: var(--sk-radius);
  background:
    radial-gradient(520px 240px at 88% 0%, rgba(123, 77, 255, .22), transparent 70%),
    linear-gradient(150deg, rgba(14, 23, 56, .95), rgba(6, 10, 28, .9));
}

.page-about .ab-next .sk-eyebrow {
  margin: 0;
}

.page-about .ab-next__title {
  margin: 10px 0 22px;
}

.page-about .ab-next__grid {
  display: grid;
  gap: 12px;
}

.page-about .ab-next__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  text-decoration: none;
  color: var(--sk-ink);
}

.page-about .ab-next__name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .ab-next__desc {
  font-size: 13px;
  color: var(--sk-mist);
  line-height: 1.65;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-grid-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-rail__label {
    padding-bottom: 10px;
    border-bottom: 1px solid var(--sk-line);
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--sk-line);
  }

  .page-about .ab-rail__list li {
    flex: 1 1 auto;
  }

  .page-about .ab-rail__link {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 10px 12px;
    margin-left: -1px;
  }

  .page-about .ab-rail__link:hover,
  .page-about .ab-rail__link:focus-visible {
    background: rgba(123, 77, 255, .1);
    box-shadow: none;
  }

  .page-about .ab-rail__link[aria-current="true"] {
    border-left-color: var(--sk-purple);
    box-shadow: none;
    background: rgba(123, 77, 255, .14);
  }

  .page-about .ab-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rail__link,
  .page-about .ab-tiers__btns .sk-tabs__btn,
  .page-about .sk-filter__btn {
    transition: none;
  }
}