.page-about {
  display: block;
  background: var(--rind);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(40px, 7vw, 92px) clamp(36px, 6vw, 76px);
  border-bottom-left-radius: var(--radius-l);
  border-bottom-right-radius: var(--radius-l);
  background:
    radial-gradient(120% 90% at 86% 6%, rgba(77, 240, 214, .16), transparent 58%),
    linear-gradient(168deg, var(--night) 0%, var(--rind) 56%, var(--ink) 100%);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .4;
  filter: grayscale(.3) contrast(1.06) brightness(.78);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26, 16, 51, .6) 0%, rgba(14, 43, 31, .74) 46%, rgba(5, 10, 8, .95) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-about .about-hero .crumbs a {
  color: var(--cyan);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .about-hero .crumbs a:hover,
.page-about .about-hero .crumbs a:focus-visible {
  color: var(--kiwi);
}

.page-about .about-hero .eyebrow {
  display: inline-block;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding: 7px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--cyan);
  font-size: .8125rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-about .about-hero .display {
  max-width: 18ch;
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(2.05rem, 6.4vw, 4.5rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.85;
  color: rgba(244, 255, 248, .84);
}

.page-about .about-hero .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.2vw, 26px);
  max-width: 880px;
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .about-hero .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero .stat-num {
  font-family: var(--font-data);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1;
  color: var(--kiwi);
}

.page-about .about-hero .stat-label {
  font-size: .875rem;
  line-height: 1.55;
  color: var(--sage);
}

/* ---------- 章节锚点 ---------- */
.page-about .about-jump {
  padding-block: clamp(16px, 2.6vw, 26px);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-about .about-jump ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  color: var(--sage);
  font-size: .875rem;
  text-decoration: none;
  transition: color .25s var(--ease), background-color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink);
  background: var(--kiwi);
  border-color: var(--kiwi);
}

/* ---------- 通用章节 ---------- */
.page-about .chapter {
  padding-block: clamp(52px, 8vw, 106px);
}

.page-about .chapter--rind { background: var(--rind); }
.page-about .chapter--night { background: var(--night); }
.page-about .chapter--indigo { background: var(--indigo); }
.page-about .chapter--wine { background: var(--wine); }
.page-about .chapter--ink { background: var(--ink); }

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .chapter__head .eyebrow {
  margin: 0;
  color: var(--cyan);
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .16em;
}

.page-about .chapter__title {
  margin: .3em 0 0;
  font-family: var(--font-title);
  font-size: clamp(1.65rem, 3.8vw, 2.6rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.015em;
  color: var(--mist);
}

.page-about .chapter__note {
  margin: 1em 0 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .prose p {
  margin: 0 0 1.15em;
  font-size: clamp(1rem, 1.2vw, 1.0625rem);
  line-height: 1.9;
  color: rgba(244, 255, 248, .86);
}

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

.page-about .prose strong {
  color: var(--kiwi);
  font-weight: 600;
}

.page-about .prose__lead {
  margin: 0 0 clamp(24px, 4vw, 38px);
  font-size: clamp(1rem, 1.3vw, 1.0625rem);
  line-height: 1.9;
  color: rgba(244, 255, 248, .88);
}

.page-about .prose__lead a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .prose__lead a:hover,
.page-about .prose__lead a:focus-visible {
  color: var(--kiwi);
  border-color: var(--kiwi);
}

/* ---------- 媒体 ---------- */
.page-about .media {
  display: block;
  margin: 0 0 clamp(26px, 4vw, 40px);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: linear-gradient(140deg, var(--night), var(--ink));
}

.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: .82;
}

.page-about .media-cap {
  display: block;
  padding: 14px 20px 16px;
  font-size: .875rem;
  line-height: 1.65;
  color: var(--sage);
  background: rgba(5, 10, 8, .5);
}

/* ---------- 流程步骤 ---------- */
.page-about .steps {
  display: grid;
  gap: 10px;
  margin: 0 0 clamp(26px, 4vw, 40px);
  padding: 0;
  list-style: none;
}

.page-about .steps li {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: linear-gradient(120deg, rgba(77, 240, 214, .09), rgba(124, 255, 107, .03));
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .steps li:hover {
  border-color: var(--line-strong);
  background: linear-gradient(120deg, rgba(77, 240, 214, .16), rgba(124, 255, 107, .05));
}

.page-about .steps__label {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 12px;
  border-radius: var(--pill);
  background: rgba(5, 10, 8, .5);
  color: var(--kiwi);
  font-size: .75rem;
  letter-spacing: .16em;
}

.page-about .steps p {
  margin: 0;
  font-size: .9688rem;
  line-height: 1.85;
  color: rgba(244, 255, 248, .84);
}

/* ---------- 校订记录展开 ---------- */
.page-about .rlog {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(5, 10, 8, .38);
  overflow: hidden;
  transition: border-color .3s var(--ease);
}

.page-about .rlog:hover {
  border-color: var(--line-strong);
}

.page-about .rlog > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 18px clamp(16px, 2.2vw, 24px);
  cursor: pointer;
  list-style: none;
}

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

.page-about .rlog__t {
  padding: 4px 12px;
  border-radius: var(--pill);
  background: var(--indigo);
  color: var(--mist);
  font-size: .75rem;
  letter-spacing: .1em;
}

.page-about .rlog__n {
  font-size: .9688rem;
  font-weight: 600;
  color: var(--mist);
}

.page-about .rlog__chev {
  width: 10px;
  height: 10px;
  margin-left: auto;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .3s var(--ease);
}

.page-about .rlog[open] .rlog__chev {
  transform: rotate(-135deg);
}

.page-about .rlog__list {
  margin: 0;
  padding: 0 clamp(16px, 2.2vw, 24px) 20px;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .rlog__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(244, 255, 248, .84);
}

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

.page-about .rlog__list .num {
  font-family: var(--font-data);
  color: var(--cyan);
}

/* ---------- 团队分工 ---------- */
.page-about .crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .crew__item {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(5, 10, 8, .34);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}

.page-about .crew__item:hover {
  border-color: var(--line-strong);
  background: rgba(5, 10, 8, .5);
  transform: translateY(-2px);
}

.page-about .crew__idx {
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .crew__name {
  margin: 10px 0 8px;
  font-family: var(--font-title);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .crew__desc {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 协作网络 ---------- */
.page-about .net {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--radius-l);
  background: rgba(5, 10, 8, .32);
  border: 1px solid var(--line);
}

.page-about .net__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .net__edges line {
  stroke: rgba(168, 195, 176, .3);
  stroke-width: 1;
}

.page-about .net__ring {
  fill: none;
  stroke: rgba(124, 255, 107, .3);
  stroke-width: 1;
}

.page-about .net__core {
  fill: rgba(124, 255, 107, .14);
  stroke: var(--kiwi);
  stroke-width: 1.5;
}

.page-about .net__node {
  fill: rgba(77, 240, 214, .1);
  stroke: var(--indigo);
  stroke-width: 1.5;
  transition: fill .3s var(--ease), stroke .3s var(--ease);
}

.page-about .net__node:hover {
  fill: rgba(77, 240, 214, .26);
  stroke: var(--cyan);
}

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

.page-about .net__legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 12px;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(244, 255, 248, .84);
}

.page-about .net__legend strong {
  color: var(--kiwi);
  font-family: var(--font-data);
  font-weight: 600;
}

.page-about .net__dot {
  width: 12px;
  height: 12px;
  margin-top: 8px;
  border-radius: 50%;
  display: block;
}

.page-about .net__dot--kiwi { background: var(--kiwi); }
.page-about .net__dot--cyan { background: var(--cyan); }
.page-about .net__dot--indigo { background: #7A4FD0; }
.page-about .net__dot--wine { background: #C24A76; }

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--kiwi), var(--cyan) 60%, transparent);
}

.page-about .timeline__item {
  position: relative;
  padding-left: 34px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--rind);
  border: 2px solid var(--cyan);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-about .timeline__item:hover::before {
  background: var(--kiwi);
  border-color: var(--kiwi);
  box-shadow: 0 0 0 6px rgba(124, 255, 107, .16);
}

.page-about .milestone > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .3s var(--ease);
}

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

.page-about .milestone > summary:hover {
  border-color: var(--line-strong);
}

.page-about .milestone__year {
  min-width: 82px;
  font-family: var(--font-data);
  font-size: 1rem;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .milestone__name {
  font-family: var(--font-title);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .milestone__chev {
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 2px solid var(--kiwi);
  border-bottom: 2px solid var(--kiwi);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .3s var(--ease);
}

.page-about .milestone[open] .milestone__chev {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-about .milestone__body {
  padding: 14px 4px 20px;
}

.page-about .milestone__body p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--sage);
}

/* ---------- 收尾 ---------- */
.page-about .outro {
  padding-block: clamp(48px, 7vw, 88px);
  background:
    radial-gradient(90% 100% at 12% 0%, rgba(124, 255, 107, .14), transparent 60%),
    linear-gradient(150deg, var(--indigo) 0%, var(--ink) 100%);
  border-top-left-radius: var(--radius-l);
  border-top-right-radius: var(--radius-l);
}

.page-about .outro__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-about .outro__title {
  margin: 0 0 14px;
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--mist);
}

.page-about .outro__text p {
  max-width: 60ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 255, 248, .82);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .chapter__grid {
    grid-template-columns: minmax(230px, .8fr) minmax(0, 1.7fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-about .chapter__head {
    position: sticky;
    top: 32px;
  }

  .page-about .net {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

  .page-about .outro__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .page-about .outro__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1040px) {
  .page-about .crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero .display {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}