.page-about {
  --about-rule: rgba(47, 243, 208, 0.26);
  --about-rule-soft: rgba(30, 63, 92, 0.9);
  --about-glow: rgba(47, 243, 208, 0.14);
  background: var(--deep);
  color: var(--mist);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px var(--gut) 0;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

.page-about .about-crumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

/* ---------- 封面 ---------- */

.page-about .about-cover {
  position: relative;
  padding: clamp(30px, 6vw, 64px) 0 clamp(28px, 5vw, 56px);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 78%;
  background:
    radial-gradient(52% 90% at 18% 0%, rgba(59, 46, 143, 0.55), transparent 68%),
    radial-gradient(40% 70% at 88% 8%, rgba(122, 31, 61, 0.32), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-cover__eyebrow {
  color: var(--cyan);
}

.page-about .about-cover__title {
  margin: 20px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(46px, 11vw, 116px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--mist);
}

.page-about .about-cover__title span {
  display: block;
}

.page-about .about-cover__signal {
  color: var(--cyan);
  text-shadow: 0 0 42px rgba(47, 243, 208, 0.28);
}

.page-about .about-cover__lead {
  max-width: 38em;
  margin: clamp(22px, 4vw, 38px) 0 0;
  color: var(--ink-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
}

/* 刻度尺 */

.page-about .about-ruler {
  position: relative;
  margin: clamp(36px, 6vw, 62px) 0 0;
  max-width: 720px;
}

.page-about .about-ruler__rail {
  position: relative;
  height: 1px;
  background: var(--about-rule-soft);
}

.page-about .about-ruler__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform-origin: left center;
  transform: scaleX(0.06);
  animation: about-rail 1.1s var(--ease) forwards;
}

@keyframes about-rail {
  to { transform: scaleX(1); }
}

.page-about .about-ruler__list {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-ruler__list li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-ruler__list li::before {
  content: "";
  position: absolute;
  top: -19px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--deep);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-ruler__list li:nth-child(2)::before { border-color: var(--orange); }
.page-about .about-ruler__list li:nth-child(3)::before { background: var(--orange); border-color: var(--orange); }

.page-about .about-ruler__list .num {
  color: var(--mist);
  font-size: 15px;
}

.page-about .about-ruler__list em {
  font-style: normal;
  color: var(--ink-faint);
}

/* 章节索引 */

.page-about .about-index {
  margin: clamp(36px, 6vw, 64px) 0 0;
  border-top: 1px solid var(--about-rule-soft);
  padding-top: 20px;
}

.page-about .about-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-index__link .num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  transition: color 0.24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-index__link:hover .num,
.page-about .about-index__link:focus-visible .num {
  color: var(--orange);
}

/* 呼吸带 */

.page-about .about-breath {
  height: clamp(56px, 11vw, 148px);
}

/* 章节标题组 */

.page-about .about-chapter__head {
  max-width: 44em;
}

.page-about .about-chapter__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-quote {
  margin: 18px 0 0;
  color: var(--cyan);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.6;
  max-width: 30em;
}

/* 图 */

.page-about .about-figure {
  margin: clamp(28px, 5vw, 52px) 0 0;
}

.page-about .about-figure img,
.page-about .about-verify__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-rule-soft);
  background: var(--hull);
}

.page-about .about-figure--team {
  max-width: 720px;
}

/* 版本时间轴 */

.page-about .about-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  list-style: none;
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--about-rule-soft);
}

.page-about .about-track__item:last-child {
  padding-bottom: 0;
  border-left-color: var(--orange);
}

.page-about .about-track__dot {
  position: absolute;
  top: 4px;
  left: -5px;
  width: 9px;
  height: 9px;
  background: var(--deep);
  border: 1px solid var(--steel);
  transform: rotate(45deg);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-about .about-track__item--latest .about-track__dot {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 61, 0.16);
}

.page-about .about-track__item:hover .about-track__dot,
.page-about .about-track__item:focus-within .about-track__dot {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 5px var(--about-glow);
}

.page-about .about-track__ver {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.page-about .about-track__item h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-track__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
  max-width: 30em;
}

.page-about .about-track__item--latest h3 {
  color: var(--orange);
}

/* 团队 */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-about .about-team__block {
  padding: 26px 22px 24px;
  background: var(--hull);
  border: 1px solid var(--about-rule-soft);
  transition: border-color 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-about .about-team__block:hover,
.page-about .about-team__block:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-team__block.panel--signal {
  border-color: rgba(47, 243, 208, 0.42);
}

.page-about .about-team__value {
  display: block;
  font-size: clamp(38px, 6vw, 54px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-team__block h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .about-team__block p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

/* 核对流程 */

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

.page-about .about-verify__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  counter-reset: none;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-steps__item:last-child {
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-steps__idx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-steps__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .about-steps__item p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

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

/* 数据带 */

.page-about .about-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule-soft);
}

.page-about .about-band__cell {
  background: var(--hull);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-band__num {
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-band__num em {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
  margin-left: 4px;
}

.page-about .about-band__key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

/* 资质 */

.page-about .about-trust {
  background: linear-gradient(180deg, rgba(59, 46, 143, 0.28), transparent 78%);
}

.page-about .about-trust__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-about .about-trust__cell {
  position: relative;
  padding: 24px 22px 22px;
  background: rgba(11, 39, 64, 0.7);
  border: 1px solid var(--about-rule-soft);
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease);
}

.page-about .about-trust__cell:hover,
.page-about .about-trust__cell:focus-within {
  border-color: var(--mint);
  background: rgba(11, 39, 64, 0.92);
}

.page-about .about-trust__icon {
  display: block;
  width: 26px;
  height: 26px;
  border: 1px solid var(--steel);
  transform: rotate(45deg);
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease);
}

.page-about .about-trust__cell:hover .about-trust__icon {
  border-color: var(--mint);
  background: rgba(123, 232, 176, 0.16);
}

.page-about .about-trust__cell h3 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--mist);
}

.page-about .about-trust__cell p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-partners {
  margin: clamp(30px, 5vw, 50px) 0 0;
  padding: 26px 22px;
  border-left: 3px solid var(--orange);
  background: rgba(122, 31, 61, 0.14);
}

.page-about .about-partners__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--ink-dim);
}

.page-about .about-partners__lead .num {
  color: var(--orange);
  font-weight: 700;
}

.page-about .about-partners__link {
  margin: 20px 0 0;
}

/* 服务对象 */

.page-about .about-serve__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(28px, 5vw, 48px) 0 0;
}

.page-about .about-serve__item {
  padding: 24px 22px 22px;
  background: var(--hull);
  border: 1px solid var(--about-rule-soft);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: border-color 0.26s var(--ease);
}

.page-about .about-serve__item:hover,
.page-about .about-serve__item:focus-within {
  border-color: var(--cyan);
}

.page-about .about-serve__item h3 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-serve__item p {
  margin: 10px 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-serve__go {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 2px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), letter-spacing 0.24s var(--ease);
}

.page-about .about-serve__go:hover,
.page-about .about-serve__go:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
  letter-spacing: 0.14em;
}

/* 结尾 */

.page-about .about-cta {
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-cta__inner {
  border-top: 1px solid var(--about-rule-soft);
  padding-top: clamp(28px, 5vw, 48px);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0 18px;
  }

  .page-about .about-track__item {
    padding: 24px 0 0 0;
    border-left: 0;
    border-top: 1px solid var(--about-rule-soft);
  }

  .page-about .about-track__item:last-child {
    border-top-color: var(--orange);
    padding-bottom: 0;
  }

  .page-about .about-track__dot {
    top: -5px;
    left: 0;
  }

  .page-about .about-track__ver {
    margin-top: 12px;
  }

  .page-about .about-verify__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .about-verify__media {
    margin-top: 26px;
  }

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

@media (min-width: 1080px) {
  .page-about .about-figure--team {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-ruler__fill {
    animation: none;
    transform: scaleX(1);
  }

  .page-about .about-team__block:hover,
  .page-about .about-team__block:focus-within {
    transform: none;
  }
}
</main>