/* ===== 关于我们 / page-about ===== */

.page-about {
  --about-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --about-ink: #0C1424;
  --about-ink-soft: #2B3A55;
  --about-ink-mute: #5E6E8A;
  --about-paper-line: rgba(12, 20, 36, .16);
  --about-green-dark: #0B7A52;

  display: block;
  background: var(--space);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.2;
}

.page-about p { margin: 0; }

.page-about ol,
.page-about ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .band {
  display: block;
  width: 100%;
  margin: 0;
}

/* 面包屑 */
.page-about .about-crumb { padding-top: 20px; }

.page-about .about-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-about .about-crumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .about-crumb__list a {
  color: var(--steel);
  text-decoration: none;
}

.page-about .about-crumb__list a:hover { color: var(--neon); }

.page-about .about-crumb__list [aria-current="page"] { color: var(--paper); }

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: 32px;
  padding: clamp(26px, 5vw, 52px) 0 clamp(36px, 6vw, 80px);
}

.page-about .about-hero__title {
  margin-top: 14px;
  max-width: 22ch;
  font-size: clamp(30px, 4.8vw, 54px);
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin-top: 20px;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 18px);
  color: var(--body);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__fnum {
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--neon);
  letter-spacing: -.03em;
}

.page-about .about-hero__flabel {
  font-size: 13px;
  color: var(--steel);
}

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

.page-about .about-hero__visual { min-height: 230px; }

.page-about .about-vis {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 4;
  max-height: 420px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    repeating-linear-gradient(90deg, transparent 0 27px, rgba(38, 52, 77, .5) 27px 28px),
    repeating-linear-gradient(0deg, transparent 0 27px, rgba(38, 52, 77, .5) 27px 28px),
    linear-gradient(170deg, rgba(28, 41, 66, .95), rgba(8, 13, 26, .98));
}

.page-about .about-vis__rail {
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: 40%;
  height: 2px;
  transform: rotate(-9deg);
  background: linear-gradient(90deg, transparent, var(--neon) 24%, var(--cyan) 58%, transparent);
  box-shadow: 0 0 18px rgba(53, 242, 164, .45);
}

.page-about .about-vis__bars {
  position: absolute;
  left: 9%;
  right: 9%;
  bottom: 12%;
  height: 48%;
  display: flex;
  align-items: flex-end;
  gap: 5%;
}

.page-about .about-vis__bar {
  flex: 1;
  height: var(--h, 40%);
  border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, rgba(53, 242, 164, .9), rgba(53, 242, 164, .1));
}

.page-about .about-vis__bar:nth-child(2) {
  background: linear-gradient(180deg, rgba(79, 216, 255, .85), rgba(79, 216, 255, .08));
}

.page-about .about-vis__bar:nth-child(5) {
  background: linear-gradient(180deg, rgba(255, 122, 47, .9), rgba(255, 122, 47, .1));
}

@keyframes aboutPulse {
  0%, 100% { opacity: .35; transform: scale(.85); }
  50% { opacity: 1; transform: scale(1.06); }
}

.page-about .about-vis__dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 14px rgba(53, 242, 164, .9);
  animation: aboutPulse 2.8s ease-in-out infinite;
}

.page-about .about-vis__dot--a { top: 14%; right: 15%; }

.page-about .about-vis__dot--b {
  bottom: 22%;
  left: 12%;
  background: var(--orange);
  box-shadow: 0 0 14px rgba(255, 122, 47, .9);
  animation-delay: 1.2s;
}

/* 章节基座 */
.page-about .about-chap {
  position: relative;
  padding: clamp(44px, 7vw, 90px) 0;
}

.page-about .about-chap--paper {
  background: var(--paper);
  color: var(--about-ink);
}

.page-about .about-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .about-head__no {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-about .about-head__kicker {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .about-h2 {
  max-width: 28ch;
  font-size: clamp(24px, 3.6vw, 40px);
  color: var(--paper);
  font-family: var(--about-serif);
}

.page-about .about-h3 {
  font-size: clamp(17px, 2.1vw, 21px);
  color: var(--paper);
}

.page-about .about-chap p { color: var(--body); }

.page-about .about-lead {
  margin-top: 18px;
  max-width: 64ch;
}

.page-about .about-note {
  margin-top: 22px;
  font-size: 14px;
  color: var(--steel);
}

.page-about .about-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 216, 255, .45);
}

.page-about .about-note a:hover { border-bottom-color: var(--cyan); }

.page-about .about-chap--paper .about-head__no { color: var(--about-green-dark); }
.page-about .about-chap--paper .about-head__kicker { color: var(--about-ink-mute); }
.page-about .about-chap--paper .about-h2,
.page-about .about-chap--paper .about-h3 { color: var(--about-ink); }
.page-about .about-chap--paper p { color: var(--about-ink-soft); }
.page-about .about-chap--paper .about-note { color: var(--about-ink-mute); }

/* 左右分栏 */
.page-about .about-split {
  display: grid;
  gap: 28px;
}

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

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

.page-about .about-fig--std img { aspect-ratio: 3 / 2; }
.page-about .about-fig--wide img { aspect-ratio: 16 / 9; }
.page-about .about-fig--tall img { aspect-ratio: 5 / 6; }

.page-about .about-fig__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--steel);
}

/* 时间轴 */
.page-about .about-banner { margin-top: 30px; }

.page-about .tl {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 80%);
  gap: 18px;
  margin-top: 34px;
  padding-bottom: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .tl__node {
  position: relative;
  scroll-snap-align: start;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-about .tl__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(53, 242, 164, .14);
}

.page-about .tl__node--now .tl__dot {
  top: -7px;
  width: 13px;
  height: 13px;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 47, .18);
}

.page-about .tl__year {
  display: block;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--neon);
}

.page-about .tl__node--now .tl__year { color: var(--orange); }

.page-about .tl__node .about-h3 { margin-top: 8px; }

.page-about .tl__line {
  margin-top: 10px;
  font-size: 15px;
  color: var(--body);
}

/* 可展开内容组 */
.page-about details { margin-top: 12px; }

.page-about summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--neon);
}

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

.page-about summary::after {
  content: "＋";
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1;
}

.page-about details[open] > summary::after { content: "－"; }

.page-about details p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--steel);
}

/* 岗位条形图 */
.page-about .bars {
  margin-top: 32px;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .bars__row {
  padding: 18px 0;
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .bars__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.page-about .bars__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--about-ink);
}

.page-about .bars__val {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--about-green-dark);
}

.page-about .bars__track {
  height: 6px;
  border-radius: 99px;
  background: rgba(12, 20, 36, .1);
  overflow: hidden;
}

.page-about .bars__fill {
  display: block;
  height: 100%;
  width: var(--w, 0);
  border-radius: 99px;
  background: linear-gradient(90deg, #0B7A52, #35C08C);
  transition: box-shadow .15s ease;
}

.page-about .bars__row:hover .bars__fill {
  box-shadow: 0 0 12px rgba(11, 122, 82, .55);
}

.page-about .bars__row--alt .bars__fill {
  background: linear-gradient(90deg, #C4531A, #FF7A2F);
}

.page-about .bars__row--alt:hover .bars__fill {
  box-shadow: 0 0 12px rgba(196, 83, 26, .5);
}

/* 项目标签 */
.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .about-chip {
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: var(--hull);
  font-size: 14px;
  color: var(--body);
}

.page-about .about-chip--more {
  border-style: dashed;
  color: var(--steel);
}

/* 大数字与指标格 */
.page-about .about-big {
  display: grid;
  gap: 26px;
  margin-top: 34px;
}

.page-about .about-big__item {
  padding-top: 18px;
  border-top: 3px solid var(--about-ink);
}

.page-about .about-big__item--accent { border-top-color: #FF7A2F; }

.page-about .about-big__value {
  display: block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(48px, 10vw, 96px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--about-ink);
}

.page-about .about-big__item--accent .about-big__value { color: #B4470F; }

.page-about .about-big__label {
  margin-top: 12px;
  font-size: 15px;
  color: #4A5A76;
}

.page-about .about-mini {
  display: grid;
  gap: 1px;
  margin-top: 36px;
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
}

.page-about .about-mini__cell {
  padding: 20px;
  background: var(--paper);
}

.page-about .about-mini__v {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--about-ink);
}

.page-about .about-mini__k {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--about-ink-mute);
}

/* 覆盖点阵 */
.page-about .about-map {
  position: relative;
  height: 150px;
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: rgba(17, 26, 46, .7);
  background-image: radial-gradient(circle, rgba(53, 242, 164, .5) 1.6px, transparent 1.8px);
  background-size: 20px 20px;
  background-position: center;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 24%, #000 76%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 24%, #000 76%, transparent);
}

/* 合作卡片 */
.page-about .about-coop {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .about-coop__card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--hull);
  transition: transform .15s ease, border-color .15s ease;
}

.page-about .about-coop__card:hover {
  transform: translateY(-2px);
  border-color: var(--neon);
}

.page-about .about-coop__sum {
  font-family: var(--sans);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-coop__how {
  color: var(--neon) !important;
  font-size: 13px !important;
}

/* 结尾邀请 */
.page-about .about-chap--cta {
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(53, 242, 164, .12), transparent 60%),
    var(--space);
}

.page-about .about-cta {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-about .about-cta__text p {
  margin-top: 16px;
  max-width: 60ch;
  color: var(--body);
}

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

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-about .about-mini { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .page-about .about-big { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; }
  .page-about .about-coop { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .about-cta { grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); gap: 40px; }
  .page-about .about-cta__acts { justify-content: flex-end; }
  .page-about .about-mini { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 992px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: center;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: center;
  }

  .page-about .about-split--medialeft .about-split__media { order: -1; }

  .page-about .tl {
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 0;
    overflow: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-vis__dot { animation: none; }
  .page-about .bars__fill,
  .page-about .about-coop__card { transition: none; }
  .page-about .about-coop__card:hover { transform: none; }
}

.page-about {
  --h: 1rem;
  --w: 1rem;
}