.page-about {
  --about-rail-w: 188px;
  --about-rail-gap: 52px;
  --about-ink-accent: #A8340F;
  --about-eco-fill: #E7DBC4;
  display: block;
  overflow-x: clip;
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: min(72vw, 720px);
  height: min(72vw, 720px);
  background: radial-gradient(circle at center, rgba(108, 59, 244, .3), transparent 66%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(58, 42, 110, .34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(58, 42, 110, .34) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 56px;
    align-items: end;
  }
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.2vw, 72px);
  font-weight: 800;
  letter-spacing: -.035em;
  line-height: 1.04;
  color: var(--text-white);
  overflow-wrap: break-word;
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--dim);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 22px;
  margin: 32px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
}

@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-hero__fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.3vw, 28px);
  letter-spacing: -.02em;
  color: var(--electric-blue);
}

.page-about .about-hero__fact-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--dim-2);
}

.page-about .about-hero__media {
  margin: 0;
}

.page-about .about-hero__media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(108, 59, 244, .38), rgba(11, 10, 18, .92));
}

.page-about .about-hero__media-frame img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-about .about-hero__media-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .09em;
  color: var(--dim-2);
}

/* ---------- Layout ---------- */

.page-about .about-layout {
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(64px, 9vw, 120px);
  display: grid;
  gap: 32px;
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-rail-gap);
    align-items: start;
  }
}

/* ---------- 章节刻度栏 ---------- */

.page-about .about-rail {
  position: relative;
}

@media (min-width: 960px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim-2);
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line-soft);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

@media (min-width: 960px) {
  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: none;
  padding: 7px 11px;
  font-size: 13px;
  color: var(--dim);
  text-decoration: none;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: color .25s var(--ease), background-color .25s var(--ease),
    border-color .25s var(--ease);
}

@media (min-width: 960px) {
  .page-about .about-rail__link {
    padding: 9px 14px;
    margin-left: -1px;
    white-space: normal;
    border-left: 2px solid transparent;
  }
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--electric-blue);
  background: rgba(43, 224, 255, .08);
}

.page-about .about-rail__link.is-current {
  color: var(--text-white);
  background: rgba(43, 224, 255, .1);
}

@media (min-width: 960px) {
  .page-about .about-rail__link.is-current {
    border-left-color: var(--electric-blue);
  }
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--ember-orange);
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  padding: clamp(8px, 1.5vw, 16px) 0;
  overflow-wrap: break-word;
}

.page-about .about-block + .about-block {
  margin-top: clamp(32px, 5vw, 68px);
}

.page-about .about-block--paper {
  position: relative;
  background: var(--paper-cream);
  color: var(--ink-brown);
  padding: clamp(28px, 4.5vw, 56px);
  border-radius: var(--radius);
}

.page-about .about-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 24px;
  padding-bottom: 18px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-block__head-text h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.14;
  color: var(--text-white);
}

.page-about .about-block__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--dim-2);
}

.page-about .about-block__lede {
  max-width: 64ch;
  margin: 0 0 28px;
  font-size: clamp(14.5px, 1.4vw, 16px);
  line-height: 1.85;
  color: var(--dim);
}

.page-about .about-block--paper .section__head {
  border-bottom-color: rgba(36, 30, 26, .18);
}

.page-about .about-block--paper .about-block__head-text h2,
.page-about .about-block--paper h3 {
  color: var(--ink-brown);
}

.page-about .about-block--paper .eyebrow {
  color: var(--about-ink-accent);
}

.page-about .about-block--paper .about-block__lede {
  color: rgba(36, 30, 26, .8);
}

/* ---------- 业务主线 ---------- */

.page-about .about-lines {
  display: grid;
  gap: 16px;
}

@media (min-width: 800px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-line {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--void-gray);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: transform .3s var(--ease), border-color .3s var(--ease),
    box-shadow .3s var(--ease);
}

.page-about .about-line:hover {
  transform: translateY(-2px);
  border-color: var(--line-cyan);
  box-shadow: 0 14px 34px rgba(43, 224, 255, .1);
}

.page-about .about-line__idx {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ember-orange);
}

.page-about .about-line h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.32;
  color: var(--text-white);
}

.page-about .about-line p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

.page-about .about-line__audience {
  padding-top: 13px;
  border-top: 1px solid var(--line-grid);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .03em;
  color: var(--neon-green);
  margin-bottom: 0;
}

/* ---------- 发展沿革 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(36, 30, 26, .16);
}

@media (min-width: 700px) {
  .page-about .about-timeline__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
    padding: 26px 0;
  }
}

.page-about .about-timeline__year {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--about-ink-accent);
}

.page-about .about-timeline__year::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border: 2px solid var(--about-ink-accent);
  border-radius: 50%;
  background: var(--paper-cream);
  transition: background-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__year::before {
  background: var(--ember-orange);
  transform: scale(1.18);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.35;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(36, 30, 26, .78);
}

.page-about .about-timeline__figure {
  position: relative;
  margin: 32px 0 0;
  aspect-ratio: 8 / 3;
  overflow: hidden;
  border: 1px solid rgba(36, 30, 26, .18);
  border-radius: var(--radius);
}

.page-about .about-timeline__figure img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (max-width: 699px) {
  .page-about .about-timeline__figure {
    aspect-ratio: 16 / 9;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-team {
  display: grid;
  gap: 18px;
}

.page-about .about-team__row {
  --share: 0;
  --accent: var(--electric-blue);
  position: relative;
  padding: 18px 20px 20px;
  background: var(--void-gray);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-team__row:hover {
  border-color: var(--line-cyan);
  box-shadow: 0 12px 30px rgba(43, 224, 255, .08);
}

.page-about .about-team__row--data {
  --share: 38.3;
  --accent: var(--phantom-purple);
}

.page-about .about-team__row--editor {
  --share: 31.7;
  --accent: var(--electric-blue);
}

.page-about .about-team__row--tech {
  --share: 21.7;
  --accent: var(--neon-green);
}

.page-about .about-team__row--support {
  --share: 8.3;
  --accent: var(--ember-orange);
}

.page-about .about-team__row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.page-about .about-team__role {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text-white);
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--accent);
}

.page-about .about-team__track {
  position: relative;
  height: 6px;
  background: rgba(58, 42, 110, .48);
  border-radius: 1px;
  overflow: hidden;
}

.page-about .about-team__fill {
  display: block;
  height: 100%;
  width: calc(var(--share) * 1%);
  background: var(--accent);
  transition: width .6s var(--ease);
}

.page-about .about-team__desc {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim);
}

/* ---------- 内容生产流程 ---------- */

.page-about .about-flow {
  display: grid;
  gap: 26px;
}

@media (min-width: 920px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 40px;
    align-items: start;
  }
}

.page-about .about-flow__svg {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 6px;
}

.page-about .about-flow__steps {
  display: grid;
  gap: 18px;
}

@media (min-width: 700px) {
  .page-about .about-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

.page-about .about-flow__step {
  --step-color: var(--deep-purple);
  padding-top: 14px;
  border-top: 2px solid var(--step-color);
}

.page-about .about-flow__step:nth-child(1) {
  --step-color: var(--phantom-purple);
}

.page-about .about-flow__step:nth-child(2) {
  --step-color: var(--electric-blue);
}

.page-about .about-flow__step:nth-child(3) {
  --step-color: var(--neon-green);
}

.page-about .about-flow__step:nth-child(4) {
  --step-color: var(--ember-orange);
}

.page-about .about-flow__step-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--step-color);
}

.page-about .about-flow__step h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-white);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--dim);
}

.page-about .about-flow__aside {
  margin: 0;
}

.page-about .about-flow__aside img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-about .about-flow__aside figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .09em;
  color: var(--dim-2);
}

/* ---------- 协作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: 18px;
}

@media (min-width: 800px) {
  .page-about .about-eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-about .about-eco__item {
  padding: 22px;
  background: var(--about-eco-fill);
  border: 1px solid rgba(36, 30, 26, .16);
  border-radius: var(--radius);
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  letter-spacing: -.01em;
  color: var(--about-ink-accent);
}

.page-about .about-eco__role {
  display: block;
  margin: 6px 0 12px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-brown);
}

.page-about .about-eco__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(36, 30, 26, .78);
}

.page-about .about-eco__note {
  margin: 26px 0 0;
  padding: 18px 22px;
  border-left: 3px solid var(--about-ink-accent);
  background: rgba(255, 255, 255, .38);
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(36, 30, 26, .86);
}

/* ---------- 服务响应 ---------- */

.page-about .about-service {
  display: grid;
  gap: 16px;
}

@media (min-width: 800px) {
  .page-about .about-service {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-service__card {
  position: relative;
  padding: 24px 22px 24px 26px;
  background: var(--glass-fill);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-about .about-service__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--electric-blue);
}

.page-about .about-service__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--neon-green);
}

.page-about .about-service__value {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.2vw, 25px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.16;
  color: var(--text-white);
}

.page-about .about-service__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--dim);
}

/* ---------- 备案与主体信息 ---------- */

.page-about .about-registry {
  padding: clamp(22px, 3.5vw, 38px);
}

.page-about .about-registry__list {
  display: grid;
  gap: 0;
  margin: 0;
}

@media (min-width: 720px) {
  .page-about .about-registry__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 44px;
  }
}

.page-about .about-registry__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-grid);
}

.page-about .about-registry__item dt {
  flex: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--dim-2);
}

.page-about .about-registry__item dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  text-align: right;
  color: var(--text-white);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-about .about-registry__note {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--dim);
}

.page-about .about-registry__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 20px 0 0;
}

.page-about .about-registry__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--electric-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.page-about .about-registry__links a:hover,
.page-about .about-registry__links a:focus-visible {
  border-bottom-color: var(--electric-blue);
}