.page-about {
  --ab-line: rgba(201, 188, 166, .26);
  --ab-ink-line: rgba(11, 9, 24, .14);
  --ab-axis: 25%;
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

.page-about .index-label {
  display: block;
  margin: 0 0 10px;
}

.page-about .about-head {
  margin-bottom: 28px;
}

.page-about .about-head .display-md {
  margin: 0;
}

.page-about .display-md {
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.16;
  letter-spacing: 0;
}

/* ---------- 首屏 ---------- */
.page-about .hero {
  position: relative;
  padding: clamp(28px, 5vw, 64px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(115% 85% at 88% 4%, rgba(162, 91, 255, .30), transparent 58%),
    radial-gradient(90% 80% at 2% 98%, rgba(53, 224, 240, .15), transparent 56%),
    var(--ink-950);
  border-bottom: 1px solid var(--edge);
}

.page-about .hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 253, 248, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 253, 248, .05) 1px, transparent 1px);
  background-size: 8px 8px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 82%);
}

.page-about .hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-about .hero__title {
  margin: 8px 0 0;
  font-size: clamp(46px, 10vw, 108px);
  line-height: .96;
  letter-spacing: -0.02em;
  text-shadow:
    3px 3px 0 rgba(162, 91, 255, .55),
    -3px -2px 0 rgba(53, 224, 240, .32);
}

.page-about .hero__lede {
  margin: 22px 0 0;
  max-width: 46ch;
  color: var(--muted);
}

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

.page-about .hero__fig {
  margin: 0;
  transform: rotate(-2.2deg);
  transition: transform 160ms ease-out;
}

.page-about .hero__fig:hover {
  transform: rotate(-1.2deg);
}

.page-about .hero__fig .figure__media {
  border: 1px solid var(--edge-strong);
  border-radius: var(--radius-organic);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-about .hero__fig .figure__cap {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: 56px;
  }
}

/* ---------- 两类事 ---------- */
.page-about .about-what {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-about .claims {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .claims li {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: start;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .claims li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .claims .mono {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
  padding-top: 5px;
}

.page-about .claims p {
  margin: 0;
  max-width: 64ch;
  color: var(--fg);
}

@media (min-width: 860px) {
  .page-about .claims {
    gap: 26px;
  }

  .page-about .claims li {
    grid-template-columns: 68px 1fr;
  }

  .page-about .claims li:nth-child(2) {
    margin-left: 36px;
  }

  .page-about .claims li:nth-child(3) {
    margin-left: 72px;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  padding: clamp(44px, 6vw, 88px) 0 clamp(52px, 7vw, 104px);
  background:
    linear-gradient(180deg, rgba(26, 20, 48, .82), rgba(11, 9, 24, .95)),
    var(--ink-950);
  border-top: 1px solid var(--edge);
  border-bottom: 1px solid var(--edge);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--ab-line);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 34px 42px;
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--violet-500);
  box-shadow: 0 0 0 4px var(--ink-950);
  transition: background 160ms ease-out;
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  background: var(--orange-500);
}

.page-about .tl__stamp {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.page-about .tl__num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .tl__data {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan-400);
  border: 1px solid rgba(53, 224, 240, .35);
  border-radius: var(--radius-block);
  padding: 2px 8px;
}

.page-about .tl__body h3 {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.35;
  font-weight: 700;
}

.page-about .tl__body p {
  margin: 8px 0 0;
  max-width: 60ch;
  color: var(--muted);
}

.page-about .tl__note {
  border-left: 2px solid var(--edge-strong);
  padding-left: 12px;
  font-size: 14px;
  color: var(--sand-400);
}

@media (min-width: 860px) {
  .page-about .tl::before {
    left: calc(var(--ab-axis) - .5px);
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: var(--ab-axis) 1fr;
    padding: 0 0 44px 0;
  }

  .page-about .tl__item::before {
    left: calc(var(--ab-axis) - 5.5px);
    top: 10px;
  }

  .page-about .tl__stamp {
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    padding-right: 34px;
    margin-bottom: 0;
  }

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

  .page-about .tl__body {
    padding-left: 42px;
  }

  .page-about .tl__note {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    transition: max-height 280ms ease-out, opacity 280ms ease-out, margin-top 280ms ease-out;
  }

  .page-about .tl__item:hover .tl__note,
  .page-about .tl__item:focus-within .tl__note {
    max-height: 140px;
    opacity: 1;
    margin-top: 10px;
  }
}

/* ---------- 暖纸面板 ---------- */
.page-about .about-paper {
  color: var(--ink-950);
  border-radius: var(--radius-organic);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid rgba(11, 9, 24, .12);
}

.page-about .about-paper__label {
  color: rgba(11, 9, 24, .55);
}

.page-about .about-paper__title {
  margin: 0 0 18px;
}

.page-about .about-paper__lead {
  margin: 0 0 22px;
  max-width: 62ch;
  color: rgba(11, 9, 24, .72);
}

.page-about .about-source {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .about-source__cols {
  display: grid;
  gap: 24px;
}

.page-about .about-source__cols h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-source__cols p {
  margin: 0 0 12px;
  max-width: 58ch;
  color: rgba(11, 9, 24, .74);
}

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

.page-about .about-paper__foot {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ab-ink-line);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(11, 9, 24, .6);
}

@media (min-width: 860px) {
  .page-about .about-source__cols {
    grid-template-columns: 6fr 5fr;
    gap: 40px;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  padding: clamp(44px, 6vw, 88px) 0;
}

.page-about .team {
  display: grid;
  gap: 18px;
}

.page-about .team__card {
  border: 1px solid var(--edge);
  border-radius: var(--radius-organic);
  padding: 22px 22px 20px;
  background: var(--ink-800);
  transition: transform 160ms ease-out, border-color 160ms ease-out;
}

.page-about .team__card:hover {
  transform: translateY(-2px);
  border-color: var(--edge-strong);
}

.page-about .team__card--a {
  background: linear-gradient(160deg, rgba(162, 91, 255, .26), var(--ink-800) 66%);
}

.page-about .team__card--b {
  background: linear-gradient(160deg, rgba(53, 224, 240, .20), var(--ink-cyan) 66%);
}

.page-about .team__card--c {
  background: linear-gradient(160deg, rgba(255, 138, 60, .20), var(--ink-800) 66%);
}

.page-about .team__card summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: .01em;
}

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

.page-about .team__sign::after {
  content: "＋";
  font-size: 16px;
  color: var(--sand-400);
}

.page-about .team__card[open] .team__sign::after {
  content: "－";
  color: var(--lime-400);
}

.page-about .team__card:focus-visible,
.page-about .team__card summary:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.page-about .team__lead {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--sand-400);
}

.page-about .team__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .team__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg);
}

.page-about .team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--cyan-400);
}

@media (min-width: 860px) {
  .page-about .team {
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-about .team__card--a {
    grid-column: span 5;
  }

  .page-about .team__card--b {
    grid-column: span 4;
  }

  .page-about .team__card--c {
    grid-column: span 3;
  }
}

/* ---------- 校订节奏 ---------- */
.page-about .about-rhythm {
  padding: clamp(40px, 6vw, 84px) 0;
  border-top: 1px solid var(--edge);
}

.page-about .about-rhythm__fig {
  margin: 0 0 34px;
  max-width: 860px;
}

.page-about .about-rhythm__fig .figure__media {
  border-radius: var(--radius-block);
  overflow: hidden;
  border: 1px solid var(--edge);
  background: var(--ink-800);
}

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

.page-about .about-rhythm__fig .figure__cap {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-rhythm__body {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .about-rhythm__cell {
  padding: 20px 0;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .about-rhythm__cell h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--violet-500);
}

.page-about .about-rhythm__cell p {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .about-rhythm__body {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 32px;
    border-top: 1px solid var(--ab-line);
  }

  .page-about .about-rhythm__cell {
    padding: 24px 0 8px;
    border-bottom: 0;
  }
}

/* ---------- 覆盖区域与设备 ---------- */
.page-about .about-cover {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .spec {
  width: 100%;
  border-collapse: collapse;
  table-layout: auto;
}

.page-about .spec th,
.page-about .spec td {
  text-align: left;
  padding: 14px 10px;
  border-bottom: 1px solid var(--ab-ink-line);
  vertical-align: top;
  font-size: 15px;
  line-height: 1.6;
}

.page-about .spec th {
  width: 34%;
  font-weight: 700;
  color: rgba(11, 9, 24, .86);
}

.page-about .spec td {
  color: rgba(11, 9, 24, .72);
}

.page-about .spec tr:last-child th,
.page-about .spec tr:last-child td {
  border-bottom: 0;
}

.page-about .spec .mono {
  font-size: 14px;
  color: var(--ink-950);
}

/* ---------- 线下校对 ---------- */
.page-about .about-store {
  padding: clamp(40px, 6vw, 88px) 0;
  background:
    linear-gradient(180deg, rgba(26, 20, 48, .6), rgba(11, 9, 24, .96)),
    var(--ink-950);
  border-top: 1px solid var(--edge);
}

.page-about .about-store__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-store__text p {
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--muted);
}

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

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

.page-about .about-store__fig .figure__media {
  border-radius: var(--radius-organic);
  overflow: hidden;
  border: 1px solid var(--edge-strong);
  background: var(--ink-800);
}

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

.page-about .about-store__fig .figure__cap {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .about-store__grid {
    grid-template-columns: 7fr 4fr;
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 校订节奏带 ---------- */
.page-about .about-cycleband {
  padding: clamp(28px, 4vw, 52px) 0 clamp(48px, 6vw, 80px);
}

.page-about .cycle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 20px;
  padding: 22px 24px;
  border: 1px solid var(--edge-strong);
  border-left: 3px solid var(--violet-500);
  border-radius: var(--radius-block);
  background:
    linear-gradient(100deg, rgba(162, 91, 255, .20), rgba(53, 224, 240, .10) 62%, transparent),
    var(--ink-800);
}

.page-about .cycle__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lime-400);
}

.page-about .cycle__text {
  flex: 1 1 240px;
}

.page-about .cycle__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-about .cycle__sub {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 62ch;
}

.page-about .cycle__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 显现与降级 ---------- */
.page-about .figure__media img {
  max-width: 100%;
  height: auto;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hero__fig,
  .page-about .team__card,
  .page-about .tl__note,
  .page-about .tl__item::before {
    transition: none;
  }

  .page-about .hero__fig {
    transform: none;
  }

  .page-about .hero__fig:hover {
    transform: none;
  }

  .page-about .team__card:hover {
    transform: none;
  }
}

@media (max-width: 480px) {
  .page-about .hero__title {
    text-shadow: 2px 2px 0 rgba(162, 91, 255, .45);
  }

  .page-about .cycle {
    padding: 18px 16px;
  }
}