.page-about {
  --about-rail: 210px;
  display: block;
  background: var(--ink);
  color: var(--paper);
  padding-bottom: 64px;
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 56px;
  background:
    radial-gradient(130% 90% at 88% -14%, rgba(47, 243, 208, .10), transparent 62%),
    radial-gradient(90% 80% at 0% 108%, rgba(255, 183, 51, .07), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(47, 243, 208, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 243, 208, .06) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-hero__kicker {
  display: inline-block;
  margin: 0 0 18px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__title-sub {
  display: block;
  margin-top: 16px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(14px, 3.4vw, 18px);
  line-height: 1.65;
  letter-spacing: 0;
  color: var(--muted);
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

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

.page-about .about-hero__board {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
  box-shadow: 6px 6px 0 rgba(47, 243, 208, .08);
}

.page-about .about-hero__board-main {
  padding: 26px 22px 24px;
  background:
    linear-gradient(135deg, rgba(47, 243, 208, .10), transparent 72%),
    var(--ink-2);
}

.page-about .about-hero__board-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(56px, 18vw, 104px);
  line-height: .92;
  letter-spacing: -.035em;
  color: var(--amber);
}

.page-about .about-hero__board-cap {
  display: block;
  margin-top: 12px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-hero__board-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
}

.page-about .about-hero__board-side .stat {
  padding: 18px 16px 20px;
  background: var(--ink-2);
}

.page-about .about-hero__side-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-hero__board-side .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ===== 章节通用 ===== */
.page-about .about-sec {
  position: relative;
  padding: 56px 0;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 96px;
}

.page-about .about-head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num note";
  column-gap: 14px;
  row-gap: 8px;
  align-items: start;
  margin-bottom: 32px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-head__num {
  grid-area: num;
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  line-height: .9;
  letter-spacing: -.05em;
  color: var(--cyan);
  transform: translateY(2px);
}

.page-about .about-head__title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 5.2vw, 30px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-head__note {
  grid-area: note;
  margin: 0;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ===== 01 起源 ===== */
.page-about .about-origin__body p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__side {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

.page-about .about-origin__side .panel {
  padding: 22px 20px;
}

.page-about .about-origin__side .panel__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-origin__side .panel__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-origin__mini {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-origin__mini .stat {
  padding: 16px 14px;
  background: var(--ink-2);
}

.page-about .about-origin__mini-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-origin__mini .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

/* ===== 02 时间轴 ===== */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .about-timeline__rail {
  position: relative;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0 0 22px;
  padding: 0 0 14px;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-timeline__rail-line {
  display: none;
}

.page-about .about-timeline__node {
  display: inline-flex;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 3px;
  min-width: 92px;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: rgba(16, 24, 33, .72);
  color: var(--muted);
  text-decoration: none;
  transition: border-color .22s ease, color .22s ease, background-color .22s ease;
}

.page-about .about-timeline__node-dot {
  display: none;
}

.page-about .about-timeline__node-num {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-timeline__node-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  color: inherit;
}

.page-about .about-timeline__node-count {
  font-family: var(--font-body);
  font-size: 11px;
  color: var(--amber);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-visible,
.page-about .about-timeline__node[aria-current="true"] {
  border-color: var(--cyan);
  background: var(--cyan-08);
  color: var(--paper);
  outline: none;
}

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

.page-about .about-timeline__item {
  position: relative;
  overflow: hidden;
  padding: 32px 18px 36px 22px;
  border-left: 1px solid var(--line);
  border-bottom: 1px dashed rgba(154, 167, 180, .18);
  scroll-margin-top: 100px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 42px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px rgba(47, 243, 208, .45);
}

.page-about .about-timeline__big {
  position: absolute;
  top: -18px;
  left: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(78px, 24vw, 140px);
  line-height: 1;
  letter-spacing: -.06em;
  color: rgba(47, 243, 208, .07);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .about-timeline__span {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .about-timeline__title {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 4.6vw, 23px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-timeline__text {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-timeline__tagline {
  position: relative;
  z-index: 1;
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 10px;
  letter-spacing: .22em;
  color: rgba(154, 167, 180, .55);
}

/* ===== 03 团队 ===== */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

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

.page-about .about-team__figure .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-team__detail p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-team__stacks {
  display: grid;
  gap: 10px;
  margin: 24px 0;
}

.page-about .team-card {
  position: relative;
  border: 1px solid var(--line-soft);
  border-radius: 4px 12px 12px 12px;
  background: linear-gradient(180deg, rgba(16, 24, 33, .96), rgba(7, 11, 15, .96));
  box-shadow: 4px 4px 0 rgba(47, 243, 208, .10);
  transition: border-color .22s ease, box-shadow .22s ease;
}

.page-about .team-card:hover,
.page-about .team-card[open] {
  border-color: var(--cyan);
  box-shadow: 5px 5px 0 rgba(47, 243, 208, .18);
}

.page-about .team-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-card__head::-webkit-details-marker {
  display: none;
}

.page-about .team-card__fold {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 15px solid var(--cyan);
  border-right: 15px solid transparent;
  pointer-events: none;
  transition: border-top-color .22s ease;
}

.page-about .team-card[open] .team-card__fold {
  border-top-color: var(--amber);
}

.page-about .team-card__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .team-card__meta {
  margin-left: auto;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .team-card__head::after {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .22s ease;
}

.page-about .team-card[open] .team-card__head::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.page-about .team-card__body {
  margin: 0;
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-team__cadence {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-team__cadence li {
  padding: 16px 10px;
  background: var(--ink-2);
  font-size: 12px;
  line-height: 1.5;
  text-align: center;
  color: var(--muted);
}

.page-about .about-team__cadence-num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  color: var(--amber);
}

/* ===== 04 手机专区 ===== */
.page-about .about-mobile__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-mobile__text p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-mobile__text .btn {
  margin-top: 4px;
}

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

.page-about .about-mobile__figure .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

/* ===== 05 结构化改版 ===== */
.page-about .about-rebuild__band {
  position: relative;
  margin: 0 0 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-rebuild__band-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.65) brightness(.6);
}

.page-about .about-rebuild__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 42%, rgba(7, 11, 15, .86) 100%),
    repeating-linear-gradient(0deg, rgba(47, 243, 208, .05) 0 1px, transparent 1px 4px);
  pointer-events: none;
}

.page-about .about-rebuild__band-cap {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 16px;
  z-index: 1;
  margin: 0;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--paper);
}

.page-about .about-rebuild__grid p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-rebuild__list {
  display: grid;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-rebuild__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border-left: 2px solid var(--cyan);
  background: rgba(16, 24, 33, .78);
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-rebuild__list-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-rebuild__hint {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

/* ===== 06 浙江服务 ===== */
.page-about .about-region p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-region__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.page-about .about-region__facts {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-region__facts > div {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--ink-2);
}

.page-about .about-region__facts dt {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-region__facts dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ===== 悬停显示条目数（仅支持悬停的设备）===== */
@media (hover: hover) and (pointer: fine) {
  .page-about .about-timeline__node-count {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: opacity .22s ease, max-height .22s ease;
  }

  .page-about .about-timeline__node:hover .about-timeline__node-count,
  .page-about .about-timeline__node:focus-visible .about-timeline__node-count {
    max-height: 20px;
    opacity: 1;
  }
}

/* ===== 平板 ===== */
@media (min-width: 600px) {
  .page-about .about-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "num title note";
    align-items: center;
    column-gap: 18px;
  }

  .page-about .about-head__note {
    text-align: right;
  }

  .page-about .about-hero__board-side .stat {
    padding: 22px 18px 24px;
  }

  .page-about .about-timeline__item {
    padding: 36px 28px 40px 30px;
  }

  .page-about .about-timeline__big {
    left: 18px;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-crumb {
    padding-top: 28px;
  }

  .page-about .about-hero {
    padding: 44px 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, .82fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .about-sec {
    padding: 80px 0;
  }

  .page-about .about-head {
    margin-bottom: 44px;
    padding-bottom: 22px;
  }

  .page-about .about-head__num {
    font-size: 54px;
  }

  .page-about .about-origin__side {
    margin-top: 0;
  }

  /* 左侧固定时间轴 */
  .page-about .about-timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 104px;
    display: grid;
    gap: 16px;
    overflow: visible;
    margin: 0;
    padding: 6px 0 6px 22px;
    border-bottom: 0;
  }

  .page-about .about-timeline__rail-line {
    display: block;
    position: absolute;
    left: 7px;
    top: 16px;
    bottom: 16px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan-24), rgba(47, 243, 208, .05));
  }

  .page-about .about-timeline__node {
    position: relative;
    min-width: 0;
    width: 100%;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: none;
  }

  .page-about .about-timeline__node-dot {
    display: block;
    position: absolute;
    left: -22px;
    top: 50%;
    width: 9px;
    height: 9px;
    margin-top: -5px;
    border-radius: 50%;
    background: var(--ink);
    border: 2px solid var(--muted);
    transition: border-color .22s ease, background-color .22s ease, box-shadow .22s ease;
  }

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

  .page-about .about-timeline__node[aria-current="true"] .about-timeline__node-dot {
    background: var(--amber);
    border-color: var(--amber);
    box-shadow: 0 0 10px var(--amber-24);
  }

  .page-about .about-timeline__node[aria-current="true"] {
    border-color: var(--line);
    background: rgba(47, 243, 208, .06);
  }

  .page-about .about-timeline__item {
    padding: 40px 40px 48px 34px;
  }

  .page-about .about-timeline__item::before {
    top: 48px;
  }

  .page-about .about-timeline__big {
    top: -26px;
    left: 22px;
    font-size: 150px;
  }

  .page-about .about-timeline__text {
    max-width: 68ch;
  }

  /* 团队 */
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.18fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: 104px;
  }

  .page-about .about-team__cadence li {
    font-size: 12px;
  }

  /* 手机专区 */
  .page-about .about-mobile__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, .72fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-mobile__figure {
    position: sticky;
    top: 104px;
  }

  /* 改版 */
  .page-about .about-rebuild__band {
    margin-bottom: 48px;
  }

  .page-about .about-rebuild__list li {
    padding: 14px 18px;
  }

  .page-about .about-rebuild__hint {
    max-width: 52ch;
  }

  /* 区域 */
  .page-about .about-region__facts {
    margin-top: 0;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__board-num {
    font-size: 112px;
  }

  .page-about .about-timeline {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-timeline__big {
    font-size: 176px;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__node,
  .page-about .team-card,
  .page-about .team-card__head::after,
  .page-about .team-card__fold,
  .page-about .about-timeline__node-dot {
    transition: none;
  }
}
</main>