.page-about {
  --ab-cut: 18px;
  --ab-gap: clamp(20px, 3.2vw, 40px);
}

/* ============ HERO ============ */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4.4vw, 52px) clamp(40px, 6vw, 78px);
  overflow: hidden;
}

.page-about .about-hero__wash {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(116deg, rgba(23, 209, 198, .13) 0%, rgba(23, 209, 198, 0) 36%),
    linear-gradient(300deg, rgba(122, 92, 255, .16) 0%, rgba(122, 92, 255, 0) 44%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 66% 100%, 0 100%);
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--ab-gap);
  margin-top: clamp(18px, 3vw, 32px);
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 58px);
  }
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.14;
  letter-spacing: .012em;
  color: var(--title);
  margin: 10px 0 0;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  color: var(--text);
  font-size: clamp(15px, 1.4vw, 17px);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 40px);
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-hero__metaitem {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-hero__metkey {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
  margin: 0;
}

.page-about .about-hero__metval {
  margin: 0;
  font-size: 15px;
  color: var(--teal);
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(8, 18, 38, .55) 0%, rgba(8, 18, 38, 0) 62%);
}

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

/* ============ 01 数据链路 ============ */
.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(24px, 3.4vw, 42px);
}

@media (min-width: 940px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .flow__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px 20px;
  background: linear-gradient(96deg, rgba(18, 36, 74, .92) 0%, rgba(14, 30, 60, .66) 100%);
  border-left: 2px solid var(--line);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}

.page-about .flow__item:hover {
  border-left-color: var(--teal);
  transform: translateX(4px);
}

.page-about .flow__idx {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--teal);
  padding-top: 3px;
}

.page-about .flow__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 0 0 6px;
}

.page-about .flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-about .flow-side {
  padding: 24px 22px 26px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--ab-cut));
}

.page-about .flow-side__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--muted);
}

.page-about .flow-side__big {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 5.4vw, 62px);
  line-height: 1;
  color: var(--teal);
  letter-spacing: .01em;
}

.page-about .flow-side__big span {
  display: inline-block;
  margin-left: 10px;
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--muted);
  vertical-align: middle;
}

.page-about .flow-side__text {
  margin: 16px 0 20px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text);
}

/* ============ 02 发展历程 ============ */
.page-about .about-history__banner {
  margin: clamp(22px, 3vw, 34px) 0 clamp(28px, 4vw, 48px);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

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

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2px;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(22px, 3.2vw, 34px) clamp(26px, 3.6vw, 42px);
  border-left: 1px solid var(--line);
}

.page-about .tl__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(23, 209, 198, .14);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .tl__item:hover::before {
  background: var(--teal);
  box-shadow: 0 0 0 7px rgba(23, 209, 198, .2);
}

.page-about .tl__year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--teal);
  margin-bottom: 8px;
}

.page-about .tl__card {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  padding: 16px 18px 18px;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .tl__card:hover {
  border-color: var(--teal);
  transform: translateX(4px);
}

.page-about .tl__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 0 0 7px;
}

.page-about .tl__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text);
}

/* ============ 03 归档方法 ============ */
.page-about .method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(24px, 3.4vw, 42px);
}

@media (min-width: 940px) {
  .page-about .method-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

.page-about .method-fields {
  padding: 24px 22px 26px;
  background:
    linear-gradient(140deg, rgba(58, 160, 255, .14) 0%, rgba(58, 160, 255, 0) 58%),
    var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .method-fields__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--blue);
}

.page-about .method-fields__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 1.8vw, 23px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 12px 0 16px;
}

.page-about .fields {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .fields__item {
  padding: 7px 12px;
  font-size: 13px;
  color: var(--text);
  background: rgba(23, 209, 198, .09);
  border: 1px solid rgba(23, 209, 198, .32);
  border-radius: 2px;
}

.page-about .method-fields__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text);
}

.page-about .verify {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .verify {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

.page-about .verify__step {
  position: relative;
  padding: 22px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%, 0 var(--ab-cut));
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .verify__step:hover {
  border-color: var(--violet);
  transform: translateY(-4px);
}

.page-about .verify__step::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--blue), transparent);
}

.page-about .verify__num {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--violet);
  margin-bottom: 12px;
}

.page-about .verify__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 0 0 8px;
}

.page-about .verify__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--text);
}

/* ============ 04 团队构成 ============ */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 48px);
  margin-top: clamp(24px, 3.4vw, 44px);
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

.page-about .teambars {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 3vw, 30px);
  height: 260px;
  padding-bottom: 40px;
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-bar {
  flex: 1 1 0;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  position: relative;
}

.page-about .team-bar--edit { --tb-h: 100%; --tb-c1: var(--teal); --tb-c2: var(--blue); }
.page-about .team-bar--eng  { --tb-h: 94%;  --tb-c1: var(--blue); --tb-c2: var(--violet); }
.page-about .team-bar--content { --tb-h: 59%; --tb-c1: var(--violet); --tb-c2: var(--orange); }

.page-about .team-bar__num {
  font-size: 15px;
  color: var(--title);
  margin-bottom: 8px;
}

.page-about .team-bar__cola {
  display: block;
  width: 100%;
  max-width: 92px;
  height: var(--tb-h);
  background: linear-gradient(to top, var(--tb-c2), var(--tb-c1));
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: transform .4s var(--ease);
  transform-origin: bottom center;
}

.page-about .team-bar:hover .team-bar__cola {
  transform: scaleY(1.04);
}

.page-about .team-bar__label {
  position: absolute;
  bottom: -34px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .about-team__copy {
  display: grid;
  gap: 20px;
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

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

.page-about .teamnote {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .teamnote__item {
  padding: 14px 16px;
  border-left: 2px solid var(--teal);
  background: var(--panel);
}

.page-about .teamnote__k {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 5px;
}

.page-about .teamnote__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

/* ============ 05 服务对象 ============ */
.page-about .users {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 42px);
}

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

@media (min-width: 1080px) {
  .page-about .users {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .users__item:nth-child(1) { grid-column: 1 / span 7; }
  .page-about .users__item:nth-child(2) { grid-column: 9 / span 4; }
  .page-about .users__item:nth-child(3) { grid-column: 2 / span 4; }
  .page-about .users__item:nth-child(4) { grid-column: 7 / span 6; }
}

.page-about .users__item {
  padding: 22px 20px 20px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--teal);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .users__item:nth-child(2) { border-top-color: var(--blue); }
.page-about .users__item:nth-child(3) { border-top-color: var(--violet); }
.page-about .users__item:nth-child(4) { border-top-color: var(--orange); }

.page-about .users__item:hover,
.page-about .users__item:focus-within {
  transform: translateY(-4px);
}

.page-about .users__idx {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-about .users__title {
  font-family: var(--font-display);
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 0 0 8px;
}

.page-about .users__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--text);
}

.page-about .users__more {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.66;
  color: var(--muted);
  max-height: 120px;
  opacity: 1;
  overflow: hidden;
  transition: max-height .4s var(--ease), opacity .3s var(--ease), margin .4s var(--ease);
}

@media (hover: hover) and (pointer: fine) {
  .page-about .users__more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }
  .page-about .users__item:hover .users__more,
  .page-about .users__item:focus-within .users__more {
    max-height: 120px;
    opacity: 1;
    margin-top: 10px;
  }
}

.page-about .users__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--muted);
  max-width: 62ch;
}

/* ============ 06 合作之前 ============ */
.page-about .checks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 42px);
}

@media (min-width: 780px) {
  .page-about .checks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .checks__item {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--ab-cut));
}

.page-about .checks__num {
  display: inline-block;
  min-width: 26px;
  padding: 3px 8px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink);
  background: var(--lime);
  border-radius: 2px;
  margin-bottom: 14px;
}

.page-about .checks__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--title);
  margin: 0 0 8px;
}

.page-about .checks__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--text);
}

.page-about .about-start__cta {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding: clamp(22px, 3vw, 32px) clamp(20px, 3vw, 34px);
  background:
    linear-gradient(104deg, rgba(255, 122, 47, .14) 0%, rgba(255, 122, 47, 0) 62%),
    var(--panel);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--orange);
}

.page-about .about-start__line {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.74;
  color: var(--text);
  max-width: 60ch;
}

.page-about .about-start__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 动效 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about .flow__item,
  .page-about .tl__card,
  .page-about .verify__step,
  .page-about .users__item,
  .page-about .team-bar__cola,
  .page-about .users__more {
    transition: none;
    transform: none;
  }
  .page-about .flow__item:hover,
  .page-about .tl__card:hover,
  .page-about .verify__step:hover,
  .page-about .users__item:hover,
  .page-about .users__item:focus-within,
  .page-about .team-bar:hover .team-bar__cola {
    transform: none;
  }
}