/* ============================================================
   品牌总览 /overview/  ——  页面专属样式
   ============================================================ */

.page-about {
  --about-line: rgba(53, 230, 216, 0.2);
  --about-line-soft: rgba(140, 155, 196, 0.16);
  --about-side-w: 292px;
  --about-sec-gap: 46px;
  position: relative;
  display: block;
}

/* ── 面包屑 ─────────────────────────────────────────────── */
.page-about .crumb {
  padding-top: 20px;
  padding-bottom: 2px;
}

/* ── 首屏 ───────────────────────────────────────────────── */
.page-about .about-hero {
  position: relative;
  padding-top: 22px;
  padding-bottom: 44px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20px -10% 0 -10%;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 230, 216, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 230, 216, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(120% 90% at 78% 8%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 90% at 78% 8%, #000 0%, transparent 68%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg,
    var(--cyan-400) 0%,
    rgba(53, 230, 216, 0) 38%,
    rgba(255, 63, 135, 0.55) 72%,
    rgba(255, 63, 135, 0) 100%);
  opacity: 0.75;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .about-hero__lead {
  position: relative;
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.022em;
  color: var(--white-50);
  max-width: 18ch;
}

.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 48ch;
  color: var(--slate-200);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

/* 资料规模速览 */
.page-about .about-facts {
  padding: 18px 18px 20px;
  border-top: 2px solid var(--cyan-400);
}

.page-about .about-facts__cap {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

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

.page-about .about-facts__item {
  display: grid;
  gap: 2px;
  padding-left: 12px;
  border-left: 1px solid var(--ink-700);
}

.page-about .about-facts__v {
  font-size: 22px;
  line-height: 1.1;
  color: var(--white-50);
  letter-spacing: -0.01em;
}

.page-about .about-facts__k {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-400);
}

/* ── 主体两栏布局 ───────────────────────────────────────── */
.page-about .about-layout {
  display: grid;
  gap: 34px;
  padding-top: 38px;
  padding-bottom: 56px;
}

.page-about .about-main {
  min-width: 0;
}

/* ── 章节通用 ───────────────────────────────────────────── */
.page-about .about-sec {
  padding-bottom: var(--about-sec-gap);
}

.page-about .about-sec + .about-sec {
  padding-top: var(--about-sec-gap);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-sec__title {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--white-50);
  max-width: 24ch;
}

.page-about .about-sec__intro {
  margin: 14px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-200);
}

/* ── 01 三类问题 ────────────────────────────────────────── */
.page-about .about-needs {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

.page-about .about-need {
  position: relative;
  padding: 18px 0 0;
  min-width: 0;
}

.page-about .about-need::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 2px;
  background: var(--cyan-400);
  transition: width 0.25s var(--ease);
}

.page-about .about-need:hover::before {
  width: 64px;
}

.page-about .about-need:nth-child(2)::before { background: var(--magenta-500); }
.page-about .about-need:nth-child(3)::before { background: var(--amber-400); }

.page-about .about-need__idx {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--cyan-400);
}

.page-about .about-need:nth-child(2) .about-need__idx { color: var(--magenta-500); }
.page-about .about-need:nth-child(3) .about-need__idx { color: var(--amber-400); }

.page-about .about-need h3 {
  margin: 6px 0 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--white-50);
}

.page-about .about-need p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-200);
}

/* ── 02 时间轴 ──────────────────────────────────────────── */
.page-about .tl {
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg,
    var(--cyan-400) 0%,
    var(--magenta-500) 54%,
    var(--amber-400) 100%);
  opacity: 0.5;
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 28px;
  min-width: 0;
}

.page-about .tl__item:last-child {
  padding-bottom: 6px;
}

.page-about .tl__node {
  position: absolute;
  left: -24px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--cyan-400);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .tl__item:nth-child(2) .tl__node { background: var(--mint-300); }
.page-about .tl__item:nth-child(3) .tl__node { background: var(--magenta-500); }
.page-about .tl__item:nth-child(4) .tl__node { background: var(--amber-400); }
.page-about .tl__item:nth-child(5) .tl__node { background: var(--mint-300); }
.page-about .tl__item:nth-child(6) .tl__node { background: var(--cyan-400); }

.page-about .tl__item:hover .tl__node,
.page-about .tl__item:focus-within .tl__node {
  transform: scale(1.35);
  box-shadow: 0 0 0 5px rgba(53, 230, 216, 0.18);
}

.page-about .tl__ver {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-about .tl__item:nth-child(3) .tl__ver { color: var(--magenta-500); }
.page-about .tl__item:nth-child(4) .tl__ver { color: var(--amber-400); }
.page-about .tl__item:nth-child(6) .tl__ver { color: var(--mint-300); }

.page-about .tl__title {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--white-50);
}

.page-about .tl__desc {
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-200);
}

.page-about .tl__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

/* ── 03 岗位展签 ────────────────────────────────────────── */
.page-about .about-team {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-role {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid var(--about-line-soft);
  background: linear-gradient(180deg, rgba(16, 26, 63, 0.92), rgba(8, 13, 38, 0.92));
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-role:hover {
  border-color: rgba(53, 230, 216, 0.42);
}

.page-about .about-role__bar {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: var(--cyan-400);
  transition: height 0.2s var(--ease);
}

.page-about .about-role:hover .about-role__bar {
  height: 5px;
}

.page-about .about-role:nth-child(2) .about-role__bar { background: var(--magenta-500); }
.page-about .about-role:nth-child(3) .about-role__bar { background: var(--amber-400); }

.page-about .about-role__no {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--slate-400);
}

.page-about .about-role__name {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white-50);
}

.page-about .about-role__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate-200);
}

.page-about .about-role__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--about-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
  opacity: 0.6;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-role:hover .about-role__note,
.page-about .about-role:focus-within .about-role__note {
  opacity: 1;
  color: var(--slate-200);
}

/* ── 04 覆盖范围 ────────────────────────────────────────── */
.page-about .about-cover {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-about .about-cover__col {
  padding-left: 14px;
  border-left: 2px solid var(--ink-700);
  min-width: 0;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-cover__col:hover {
  border-color: var(--mint-300);
}

.page-about .about-cover__name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white-50);
}

.page-about .about-cover__col p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate-200);
}

/* ── 05 纠错通道 ────────────────────────────────────────── */
.page-about .about-feedback {
  margin-top: 26px;
  padding: 22px 18px;
  background: var(--ink-800);
  border-left: 3px solid var(--magenta-500);
}

.page-about .about-feedback__text {
  max-width: var(--measure);
}

.page-about .about-feedback__text p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate-200);
}

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

.page-about .about-feedback__act {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ── 图注容器 ───────────────────────────────────────────── */
.page-about .about-fig {
  margin: 30px 0 0;
}

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

.page-about .about-fig .frame__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ── 右侧服务数据窄栏 ───────────────────────────────────── */
.page-about .about-side {
  min-width: 0;
}

.page-about .about-side__sticky {
  padding: 20px 18px 22px;
  border: 1px solid var(--about-line);
  background: var(--glass);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-about .about-side__cap {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-about .about-side__list {
  margin: 0;
  padding: 0;
}

.page-about .about-side__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(27, 39, 87, 0.9);
}

.page-about .about-side__row:last-child {
  border-bottom: none;
}

.page-about .about-side__row dt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate-400);
}

.page-about .about-side__row dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.5;
  text-align: right;
  color: var(--white-50);
}

.page-about .about-side__cta {
  width: 100%;
  margin-top: 18px;
  text-align: center;
}

.page-about .about-side__foot {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ── 平板 ───────────────────────────────────────────────── */
@media (min-width: 700px) {
  .page-about .about-needs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-cover {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-feedback {
    padding: 26px 26px;
  }
}

/* ── 桌面 ───────────────────────────────────────────────── */
@media (min-width: 920px) {
  .page-about .about-hero {
    padding-top: 32px;
    padding-bottom: 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 316px;
    gap: 54px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-side-w);
    gap: 52px;
    align-items: start;
    padding-top: 46px;
    padding-bottom: 72px;
  }

  .page-about .about-side__sticky {
    position: sticky;
    top: 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__lead {
    padding-left: 58px;
  }

  .page-about .about-hero__anno {
    display: block;
    position: absolute;
    left: 0;
    top: 4px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.34em;
    color: var(--slate-400);
    opacity: 0.75;
  }
}

/* ── 降低动效偏好 ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-need::before,
  .page-about .about-role__bar,
  .page-about .about-role__note,
  .page-about .tl__node,
  .page-about .about-cover__col {
    transition: none;
  }
}
<<<END>>>