.page-about {
  --about-hair: rgba(38, 242, 192, .24);
  --about-wash: rgba(10, 36, 28, .58);
  position: relative;
  background: var(--ink);
  color: var(--gray);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 8vw, 104px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -6%;
  right: -14%;
  width: min(720px, 92%);
  height: 74%;
  z-index: -2;
  pointer-events: none;
  background: linear-gradient(132deg, rgba(38, 242, 192, .22), rgba(255, 74, 31, .18) 58%, transparent 86%);
  clip-path: polygon(22% 0, 100% 0, 100% 68%, 0 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  bottom: 2%;
  width: min(520px, 74%);
  height: 42%;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(20deg, rgba(255, 180, 55, .16), transparent 72%);
  clip-path: polygon(0 0, 100% 24%, 76% 100%, 0 100%);
}

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

.page-about .about-hero__title {
  margin: 10px 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 5.6vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 16px;
  font-size: clamp(1rem, 1.7vw, 1.125rem);
  line-height: 1.8;
  max-width: 46em;
}

.page-about .about-hero__lede--sub {
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  color: var(--paper);
  opacity: .88;
}

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

.page-about .about-hero__aside {
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--about-hair);
  align-self: start;
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: .875rem;
  line-height: 1.6;
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
}

.page-about .about-facts dt {
  color: var(--gray);
  flex: 0 0 auto;
}

.page-about .about-facts dd {
  margin: 0;
  color: var(--paper);
  font-weight: 700;
  text-align: right;
}

.page-about .about-hero__note {
  display: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(48px, 7vw, 100px) 0;
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(100%, 1280px);
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(255, 180, 55, .7) 40%, transparent 84%);
  opacity: .32;
}

.page-about .section-head__note {
  margin: 10px 0 0;
  font-size: clamp(.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--gray);
  max-width: 44em;
}

/* ---------- 01 服务构成 ---------- */
.page-about .about-svc {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 28px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-svc__item {
  padding: 18px 0 18px 20px;
  border-left: 2px solid var(--line);
  transition: border-color var(--t-fast) linear;
}

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

.page-about .about-svc__no {
  display: block;
  font-family: var(--font-num);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--cyan-soft);
}

.page-about .about-svc__name {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.1875rem;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-svc__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .about-scope {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(34px, 5vw, 60px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-scope__item {
  background: var(--panel);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .about-scope__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 6vw, 3.6rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-scope__unit {
  display: block;
  margin-top: 6px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scope__item p {
  margin: 10px 0 0;
  font-size: .875rem;
  line-height: 1.75;
}

.page-about .about-linkrow {
  margin: clamp(28px, 4vw, 44px) 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  max-width: 46em;
}

/* ---------- 02 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: clamp(30px, 4vw, 50px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 10px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(38, 242, 192, .1);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--cyan);
  border-color: var(--cyan-soft);
}

.page-about .about-timeline__ver {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.6vw, 2.75rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--amber);
}

.page-about .about-timeline__item:last-child .about-timeline__ver {
  color: var(--cyan);
}

.page-about .about-timeline__name {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.85;
  max-width: 46em;
}

.page-about .about-timeline__cap {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-timeline__sum {
  margin: clamp(38px, 5vw, 60px) 0 0;
  padding: 16px 0 16px 18px;
  border-left: 3px solid var(--flare);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--paper);
  max-width: 52em;
}

.page-about .about-timeline__media {
  margin: clamp(30px, 5vw, 52px) auto 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

/* ---------- 03 跟队三件事 ---------- */
.page-about .about-follow {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(28px, 4vw, 52px);
}

.page-about .about-follow__item {
  padding-top: 20px;
  border-top: 2px solid var(--panel-hi);
  transition: border-color var(--t-fast) linear;
}

.page-about .about-follow__item:hover {
  border-top-color: var(--cyan);
}

.page-about .about-follow__no {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.2rem, 5.4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-follow__name {
  margin: 12px 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-follow__text {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.85;
}

/* ---------- 04 编辑台分工 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 60px);
}

.page-about .about-team__lede {
  margin: 20px 0 0;
  font-size: .9688rem;
  line-height: 1.85;
  max-width: 42em;
}

.page-about .about-team__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-team__list li {
  padding: 13px 0;
  border-top: 1px solid var(--line);
  font-size: .9375rem;
  line-height: 1.78;
}

.page-about .about-team__list li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__list strong {
  color: var(--cyan);
  font-weight: 700;
  margin-right: 8px;
}

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

/* ---------- 05 选择理由 ---------- */
.page-about .about-reasons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-reason {
  background: var(--panel);
  padding: clamp(22px, 3vw, 34px) clamp(18px, 3vw, 30px);
  transition: background var(--t-fast) linear;
}

.page-about .about-reason:hover {
  background: var(--panel-hi);
}

.page-about .about-reason__key {
  display: block;
  font-family: var(--font-num);
  font-size: .8125rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .about-reason__name {
  margin: 10px 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.125rem;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-reason p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.82;
}

/* ---------- 06 运营中心 ---------- */
.page-about .about-chapter--hq {
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-about .about-hq__media {
  margin: 0 0 clamp(30px, 5vw, 56px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-hq__text p {
  margin: 0 0 14px;
  font-size: .9688rem;
  line-height: 1.85;
  max-width: 46em;
}

.page-about .about-hq__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-closing {
  margin: clamp(38px, 6vw, 72px) 0 0;
  padding-top: 20px;
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--cyan), rgba(255, 74, 31, .7) 55%, transparent) 1;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.0625rem, 2.3vw, 1.5rem);
  line-height: 1.6;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 34em;
}

/* ---------- 章节圆点导航 ---------- */
.page-about .section-dots {
  display: none;
}

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

  .page-about .about-svc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 56px);
    row-gap: clamp(26px, 3.5vw, 40px);
  }

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

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, .85fr);
    align-items: start;
  }

  .page-about .about-hero__aside {
    margin-top: 48px;
  }

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

  .page-about .about-follow__item:nth-child(2) {
    margin-top: 42px;
  }

  .page-about .about-follow__item:nth-child(3) {
    margin-top: 84px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
  }

  .page-about .about-svc__item:nth-child(2),
  .page-about .about-svc__item:nth-child(4) {
    transform: translateX(clamp(10px, 2vw, 28px));
  }

  .page-about .about-timeline__cap {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--t-base) ease-out, opacity var(--t-base) ease-out, margin-top var(--t-base) ease-out;
  }

  .page-about .about-timeline__item:hover .about-timeline__cap,
  .page-about .about-timeline__item:focus-within .about-timeline__cap {
    max-height: 140px;
    margin-top: 14px;
    opacity: 1;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: clamp(40px, 6vw, 84px);
    right: clamp(16px, calc((100vw - var(--shell)) / 2 - 36px), 120px);
    color: var(--cyan);
    opacity: .6;
  }

  .page-about .section-dots {
    display: flex;
    position: fixed;
    right: clamp(14px, calc((100vw - var(--shell)) / 2 - 44px), 40px);
    top: 50%;
    transform: translateY(-50%);
    flex-direction: column;
    gap: 14px;
    z-index: 20;
  }

  .page-about .section-dots__link {
    display: block;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: transparent;
    transition: background var(--t-fast) linear, border-color var(--t-fast) linear, transform var(--t-fast) linear;
  }

  .page-about .section-dots__link:hover,
  .page-about .section-dots__link:focus-visible {
    background: var(--cyan);
    border-color: var(--cyan);
    transform: scale(1.35);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-svc__item,
  .page-about .about-follow__item,
  .page-about .about-reason,
  .page-about .about-timeline__cap {
    transition: none;
  }

  .page-about .about-svc__item:nth-child(2),
  .page-about .about-svc__item:nth-child(4) {
    transform: none;
  }
}
</style>