.page-about {
  --about-line: rgba(143, 166, 184, 0.26);
  --about-cut: 26px;
  --about-text: #C9D4DE;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 56px;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0 0 26px;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: clamp(180px, 40vw, 360px);
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.92);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(7, 26, 43, 0) 32%, rgba(7, 26, 43, 0.88) 100%);
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  z-index: 1;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(255, 248, 236, 0.78);
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--peach);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 9vw, 5rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
  color: var(--paper-bright);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 20px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: 0 0 30px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-text);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-hero__stats .stat {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border-left: 3px solid var(--orange);
}

.page-about .about-hero__stats .stat:nth-child(2n) {
  border-left-color: var(--lime);
}

.page-about .about-hero__stats .stat__value {
  display: block;
  font-size: 1.7rem;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-hero__stats .stat__value small {
  font-size: 0.55em;
  margin-left: 2px;
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding: 52px 0;
  border-top: 1px dashed var(--about-line);
}

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

.page-about .about-sec__side {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-sec__num {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--orange);
}

.page-about .about-sec__tag {
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--mist);
}

.page-about .about-sec__head {
  margin-bottom: 8px;
}

.page-about .about-sec__head .about-sec__num {
  display: block;
  margin-bottom: 10px;
}

.page-about .about-sec__head .about-sec__tag {
  display: block;
  margin-bottom: 12px;
}

.page-about .about-sec__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.65rem, 4.6vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper-bright);
}

.page-about .about-sec__lead,
.page-about .about-sec__main p {
  max-width: 68ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-text);
}

.page-about .about-sec__inline {
  margin-top: 20px;
  font-size: 15px;
}

.page-about .about-sec__inline a {
  color: var(--peach);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-sec__inline a:hover {
  color: var(--lime);
}

.page-about .about-sec__figure {
  margin: 32px auto 0;
}

.page-about .about-sec__figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 46vw, 380px);
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .about-sec__figure figcaption,
.page-about .about-compare__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 改版对比 ---------- */
.page-about .about-compare {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-compare__panel {
  padding: 24px 20px 26px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
}

.page-about .about-compare__panel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  color: var(--paper-bright);
}

.page-about .about-compare__panel--old h3 {
  color: var(--mist);
}

.page-about .about-compare__panel--new h3 {
  color: var(--lime);
}

.page-about .about-compare__panel ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-compare__panel li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-text);
}

.page-about .about-compare__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--mist);
}

.page-about .about-compare__panel--new li::before {
  background: var(--lime);
}

.page-about .about-compare__figure {
  margin: 20px 0 0;
}

.page-about .about-compare__figure img {
  display: block;
  width: 100%;
  height: clamp(160px, 40vw, 340px);
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---------- 三道流程 ---------- */
.page-about .about-flow {
  margin: 26px 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 22px 20px 24px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-top: 2px solid var(--orange);
}

.page-about .about-flow__step:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-flow__step:nth-child(3) {
  border-top-color: var(--lime);
}

.page-about .about-flow__idx {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-flow__step h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--paper-bright);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-text);
}

/* ---------- 协作岗位 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin: 24px 0 22px;
}

.page-about .about-roles__item {
  padding: 22px 20px 24px;
  border-radius: var(--radius-md);
  background: var(--paper);
  color: #1B3042;
}

.page-about .about-roles__item h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: #0C2437;
}

.page-about .about-roles__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #3D5568;
}

.page-about .about-roles__item .capsule {
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 24px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), var(--orange));
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 50px;
}

.page-about .about-timeline__stage {
  position: absolute;
  left: 0;
  top: 4px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-timeline__card {
  padding: 20px 20px 22px;
  border-radius: var(--radius-md);
  background: var(--paper);
}

.page-about .about-timeline__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  color: #0C2437;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #3D5568;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  gap: 14px;
  margin: 24px 0 22px;
}

.page-about .about-honor {
  padding: 22px 20px 24px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border-left: 3px solid var(--orange);
}

.page-about .about-honor:nth-child(2) {
  border-left-color: var(--lime);
}

.page-about .about-honor:nth-child(3) {
  border-left-color: var(--amber);
}

.page-about .about-honor__num {
  display: block;
  font-size: 2rem;
  line-height: 1;
  color: var(--paper-bright);
}

.page-about .about-honor__num small {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--orange);
}

.page-about .about-honor h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--paper-bright);
}

.page-about .about-honor p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: 52px 0 64px;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-next__title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 1.9rem);
  color: var(--paper-bright);
}

.page-about .about-next__grid {
  display: grid;
  gap: 12px;
}

.page-about .about-next__link {
  display: grid;
  gap: 6px;
  min-height: 44px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  text-decoration: none;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--orange);
}

.page-about .about-next__label {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--paper-bright);
}

.page-about .about-next__desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 40px 0 72px;
  }

  .page-about .about-sec {
    padding: 72px 0;
  }

  .page-about .about-sec__grid {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-sec__side {
    flex-direction: column;
    gap: 10px;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-sec__num {
    font-size: 40px;
  }

  .page-about .about-sec__tag {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .page-about .about-sec__head {
    max-width: 78%;
    padding-left: 118px;
    position: relative;
  }

  .page-about .about-sec__head .about-sec__num {
    position: absolute;
    left: 0;
    top: 4px;
    margin: 0;
    font-size: 40px;
  }

  .page-about .about-sec__head .about-sec__tag {
    writing-mode: horizontal-tb;
    margin-bottom: 14px;
  }

  .page-about .about-compare {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-top: 34px;
  }

  .page-about .about-compare__panel--old {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    padding-right: 54px;
    clip-path: polygon(0 0, 100% 0, calc(100% - var(--about-cut)) 100%, 0 100%);
    background: linear-gradient(165deg, #0E2740, #0A2033);
  }

  .page-about .about-compare__panel--new {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding-left: 54px;
    clip-path: polygon(var(--about-cut) 0, 100% 0, 100% 100%, 0 100%);
    background: linear-gradient(200deg, #12304C, #0E2740);
    border-color: var(--ink-700);
  }

  .page-about .about-compare__figure {
    grid-column: 1 / -1;
    margin-top: 24px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -13px;
    top: calc(50% - 4px);
    width: 8px;
    height: 8px;
    border-top: 2px solid var(--orange);
    border-right: 2px solid var(--orange);
    transform: rotate(45deg);
  }

  .page-about .about-roles,
  .page-about .about-honors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    margin-left: 118px;
  }

  .page-about .about-timeline__item {
    padding-left: 62px;
  }

  .page-about .about-timeline__card {
    padding: 24px 26px 26px;
  }

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

  .page-about .about-sec__figure {
    padding-left: 118px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__media img {
    height: 400px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}