.page-about {
  --about-deep: #0B1026;
  --about-night: #151D3B;
  --about-purple: #7C5CFF;
  --about-orange: #FF6B35;
  --about-cyan: #21D4FD;
  --about-cream: #F2EDE4;
  --about-ink: #211C15;
  --about-card-bg: #FFFDF7;
  --about-ink-soft: rgba(33, 28, 21, 0.76);
  background: var(--about-deep);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  padding: 8px 0 64px;
  position: relative;
  isolation: isolate;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(115deg, rgba(124, 92, 255, 0.18) 0%, rgba(11, 16, 38, 0) 42%),
    radial-gradient(circle at 86% 18%, rgba(33, 212, 253, 0.2) 0%, rgba(11, 16, 38, 0) 48%);
}
.page-about .about-hero__grid {
  display: grid;
  gap: 40px;
  margin-top: 40px;
}
.page-about .about-hero h1 {
  font-size: clamp(30px, 5.6vw, 52px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.page-about .about-hero__slogan {
  font-family: var(--font-mono);
  color: var(--about-cyan);
  font-size: 16px;
  letter-spacing: 0.08em;
  margin: 0 0 24px;
}
.page-about .about-hero__content p {
  max-width: 64ch;
  color: var(--text-secondary);
}
.page-about .about-hero__content .text-lead {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 300;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.page-about .about-hero__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(33, 212, 253, 0.22);
  font-family: var(--font-mono);
  font-size: 13px;
}
.page-about .about-hero__anchors a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}
.page-about .about-hero__anchors a:hover,
.page-about .about-hero__anchors a.is-scroll-active {
  color: var(--about-cyan);
  border-bottom-color: var(--about-cyan);
}
.page-about .about-hero__visual {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 10% 6% 10% 16%;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.32), rgba(33, 212, 253, 0.12));
  clip-path: polygon(0 0, 82% 0, 100% 100%, 14% 100%);
}
.page-about .about-hero__ring {
  position: absolute;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(255, 107, 53, 0.5);
  border-radius: 12px;
  transform: rotate(45deg);
}
.page-about .about-hero__v4 {
  font-family: var(--font-mono);
  font-size: clamp(112px, 20vw, 188px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, #F2EDE4 8%, var(--about-purple) 52%, var(--about-cyan) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.92;
  position: relative;
  z-index: 1;
}
.page-about .about-hero__code {
  position: absolute;
  left: 4%;
  bottom: 8%;
  display: grid;
  gap: 6px;
  z-index: 2;
  font-size: 12px;
  color: rgba(242, 237, 228, 0.6);
  letter-spacing: 0.12em;
}

/* ===== 品牌定位 ===== */
.page-about .about-position {
  padding: 72px 0;
  background:
    radial-gradient(circle at 88% 12%, rgba(33, 212, 253, 0.08), transparent 32%),
    linear-gradient(180deg, var(--about-deep), var(--about-night));
}
.page-about .about-position__head {
  margin-bottom: 36px;
}
.page-about .about-position__grid {
  display: grid;
  gap: 40px;
}
.page-about .about-position__statement {
  max-width: 46ch;
}
.page-about .about-position__lead {
  font-size: 22px;
  font-weight: 700;
  color: var(--about-cyan);
  margin: 0 0 16px;
}
.page-about .about-position__statement p {
  color: var(--text-secondary);
}
.page-about .about-position__list {
  display: grid;
  gap: 12px;
}
.page-about .about-position__item {
  position: relative;
  padding: 18px 20px;
  background: rgba(21, 29, 59, 0.62);
  border-left: 3px solid var(--about-purple);
  display: grid;
  gap: 6px;
  transition: transform var(--duration) var(--ease), background var(--duration) var(--ease);
}
.page-about .about-position__item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 3px;
  background: var(--about-orange);
}
.page-about .about-position__item:hover {
  transform: translateX(6px);
  background: rgba(124, 92, 255, 0.14);
}
.page-about .about-position__item-code {
  font-size: 12px;
  color: var(--about-cyan);
  opacity: 0.8;
}
.page-about .about-position__item h3 {
  margin: 0;
  font-size: 18px;
  color: var(--text-primary);
}
.page-about .about-position__item p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}
.page-about .about-position__stats {
  margin-top: 56px;
  border-top: 1px solid rgba(124, 92, 255, 0.3);
  padding-top: 38px;
}
.page-about .about-position__stats .data-grid__cell {
  background: rgba(21, 29, 59, 0.5);
  padding: 22px 18px;
  text-align: left;
  position: relative;
}
.page-about .about-position__stats .data-grid__cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: linear-gradient(90deg, var(--about-orange), var(--about-purple));
}
.page-about .about-position__stats .data-grid__value {
  color: var(--about-cyan);
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
}
.page-about .about-position__stats .data-grid__label {
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ===== 版本演进 ===== */
.page-about .about-versions {
  padding: 0 0 88px;
}
.page-about .about-versions__head {
  padding-top: 72px;
  padding-bottom: 40px;
}
.page-about .about-versions__history {
  background: var(--about-cream);
  color: var(--about-ink);
  padding: 48px 0;
}
.page-about .about-versions__history-grid {
  display: grid;
  gap: 18px;
}
.page-about .version-card--cream {
  position: relative;
  background: var(--about-card-bg);
  padding: 28px 24px 26px;
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.page-about .version-card--cream::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 30px solid var(--about-cream);
  border-left: 30px solid transparent;
}
.page-about .version-card--cream:hover {
  transform: translateY(-6px);
  box-shadow: 10px 14px 0 rgba(33, 28, 21, 0.1);
}
.page-about .version-card--cream .version-card__topline {
  color: var(--about-orange);
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.page-about .version-card--cream h3 {
  color: var(--about-ink);
  font-size: 20px;
  margin: 0 0 12px;
}
.page-about .version-card--cream p {
  color: var(--about-ink-soft);
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}
.page-about .about-versions__now {
  background: var(--about-deep);
  padding: 56px 0 0;
}
.page-about .about-versions__now-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}
.page-about .about-versions__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  filter: saturate(0.9);
}
.page-about .version-card--v4 {
  position: relative;
  background: linear-gradient(135deg, var(--about-night), rgba(124, 92, 255, 0.16));
  border: 1px solid rgba(124, 92, 255, 0.5);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
  padding: 32px 28px;
  color: var(--text-primary);
}
.page-about .version-card__topline {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--about-orange);
  margin-bottom: 10px;
}
.page-about .version-card--v4 h3 {
  font-size: 24px;
  margin: 0 0 14px;
  color: #ffffff;
}
.page-about .version-card--v4 p {
  color: var(--text-secondary);
  margin: 0 0 16px;
  line-height: 1.75;
}
.page-about .version-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.page-about .version-card__list li {
  padding-left: 20px;
  position: relative;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
}
.page-about .version-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 2px;
  background: var(--about-cyan);
}

/* ===== 覆盖范围 ===== */
.page-about .about-coverage {
  padding: 88px 0;
  background:
    linear-gradient(90deg, rgba(255, 107, 53, 0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 107, 53, 0.05) 1px, transparent 1px),
    var(--about-deep);
  background-size: 48px 48px;
}
.page-about .about-coverage__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about .about-coverage__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(124, 92, 255, 0.35);
  filter: saturate(0.88);
  transition: border-color var(--duration) var(--ease);
}
.page-about .about-coverage__media:hover img {
  border-color: var(--about-cyan);
}
.page-about .coverage-meta {
  margin-top: 28px;
  display: grid;
  gap: 26px;
}
.page-about .coverage-meta__block h3 {
  font-size: 15px;
  color: var(--about-cyan);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}
.page-about .coverage-meta__block p {
  color: var(--text-secondary);
  margin: 0;
}
.page-about .coverage-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
  max-width: 46ch;
}
.page-about .coverage-tags li {
  border: 1px solid rgba(242, 237, 228, 0.18);
  padding: 6px 12px;
  font-size: 14px;
  color: var(--text-primary);
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}
.page-about .coverage-tags li:hover {
  border-color: var(--about-purple);
  background: rgba(124, 92, 255, 0.18);
}
.page-about .coverage-data {
  margin-top: 40px;
  border-top: 1px solid rgba(242, 237, 228, 0.12);
}
.page-about .coverage-data__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid rgba(242, 237, 228, 0.08);
}
.page-about .coverage-data__name {
  color: var(--text-muted);
  font-size: 13px;
}
.page-about .coverage-data__val {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-orange);
  transition: color var(--duration) var(--ease);
}
.page-about .coverage-data__row:hover .coverage-data__val {
  color: var(--about-cyan);
}

/* ===== 团队与流程 ===== */
.page-about .about-team {
  background: var(--about-cream);
  color: var(--about-ink);
  padding: 88px 0;
}
.page-about .about-team .section-heading__index {
  color: var(--about-orange);
}
.page-about .about-team .section-heading__text,
.page-about .about-team .text-lead {
  color: var(--about-ink);
}
.page-about .about-team .text-lead {
  max-width: 48ch;
}
.page-about .about-team__grid {
  display: grid;
  gap: 48px;
  align-items: center;
}
.page-about .team-roles {
  display: grid;
  gap: 20px;
  margin-top: 36px;
}
.page-about .team-role {
  border-left: 3px solid var(--about-purple);
  padding: 16px 20px;
  background: #fff8ec;
  transition: transform var(--duration) var(--ease);
}
.page-about .team-role:hover {
  transform: translateX(8px);
}
.page-about .team-role__code {
  font-size: 13px;
  color: var(--about-orange);
  font-weight: 700;
}
.page-about .team-role h3 {
  font-size: 18px;
  margin: 6px 0 8px;
  color: var(--about-ink);
}
.page-about .team-role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}
.page-about .about-team__media img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 8px solid var(--about-card-bg);
  box-shadow: 16px 16px 0 rgba(33, 28, 21, 0.08);
  filter: sepia(0.12) saturate(0.9);
}

/* ===== 合规与联系 ===== */
.page-about .about-compliance {
  padding: 88px 0;
  background:
    linear-gradient(160deg, var(--about-night) 0%, var(--about-deep) 68%);
}
.page-about .about-compliance__panel {
  display: grid;
  gap: 40px;
  border-left: 1px solid rgba(124, 92, 255, 0.4);
  padding-left: 24px;
}
.page-about .about-compliance__main {
  max-width: 52ch;
}
.page-about .about-compliance__mail {
  margin-top: 24px;
  padding: 18px 20px;
  background: rgba(124, 92, 255, 0.12);
  border-left: 3px solid var(--about-orange);
  color: var(--text-secondary);
}
.page-about .about-compliance__contact {
  display: grid;
  gap: 16px;
}
.page-about .compliance-item {
  background: rgba(21, 29, 59, 0.72);
  padding: 18px 20px;
  display: grid;
  gap: 6px;
  border-top: 2px solid var(--about-orange);
}
.page-about .compliance-item__label {
  font-size: 12px;
  color: var(--about-cyan);
}
.page-about .compliance-item__value {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
}
.page-about .compliance-item__note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.page-about .about-compliance__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(242, 237, 228, 0.12);
}

/* ===== 响应式增强 ===== */
@media (min-width: 720px) {
  .page-about .about-position__list {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-hero__visual {
    min-height: 320px;
  }
  .page-about .about-hero__code {
    left: 8%;
    bottom: 12%;
  }
  .page-about .about-versions__history-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .coverage-meta {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .coverage-meta__block:last-child {
    grid-column: 1 / -1;
  }
  .page-about .about-compliance__cta {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 16px 0 88px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: 52% 1fr;
    gap: 48px;
    align-items: center;
  }
  .page-about .about-hero__visual {
    min-height: 340px;
  }
  .page-about .about-position__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .page-about .about-versions__history-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-about .about-versions__now-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
  .page-about .about-coverage__grid {
    grid-template-columns: 48% 1fr;
    gap: 64px;
  }
  .page-about .about-team__grid {
    grid-template-columns: 1fr 44%;
    gap: 56px;
  }
  .page-about .about-compliance__panel {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    padding-left: 48px;
  }
}