/* ===== 品牌档案页 / page-about ===== */

.page-about {
  background: var(--pitch);
  color: var(--chalk);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -14%;
  width: 62vw;
  height: 62vw;
  max-width: 680px;
  max-height: 680px;
  background: radial-gradient(circle, rgba(232, 255, 58, 0.1), transparent 66%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: 1.75rem;
}

.page-about .hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 5.6vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 0.55rem 0 1.3rem;
  color: var(--chalk);
}

.page-about .hero-lead {
  font-size: var(--t-16);
  line-height: 1.78;
  color: var(--mist);
  max-width: 48ch;
  margin: 0 0 1rem;
}

.page-about .hero-lead strong {
  color: var(--chalk);
  font-weight: 700;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.85rem;
}

.page-about .hero-shot {
  position: relative;
  margin: 0;
  aspect-ratio: 14 / 9;
  background: var(--panel);
  border: 1px solid var(--seam);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .hero-shot img,
.page-about .about-shot img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .hero-shot::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42%;
  height: 4px;
  background: linear-gradient(90deg, var(--volt), var(--flare));
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--seam);
  border: 1px solid var(--seam);
}

.page-about .stat {
  background: var(--pitch);
  padding: 1.1rem 1.15rem 1.3rem;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.05;
  color: var(--volt);
}

.page-about .stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: var(--t-14);
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 区块题头 ---------- */

.page-about .about-head {
  display: grid;
  gap: 0.5rem 1.5rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .head-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 0.9;
  color: var(--volt);
  opacity: 0.35;
}

.page-about .head-title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0 0 0.6rem;
  color: var(--chalk);
}

.page-about .head-note {
  margin: 0;
  color: var(--mist);
  font-size: var(--t-16);
  line-height: 1.72;
  max-width: 62ch;
}

/* ---------- 起点 ---------- */

.page-about .origin-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .origin-copy p {
  font-size: var(--t-16);
  line-height: 1.78;
  color: var(--mist);
  margin: 0 0 1.1rem;
  max-width: 64ch;
}

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

.page-about .origin-quote {
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--panel);
  border: 1px solid var(--seam);
  border-left: 3px solid var(--volt);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  align-self: start;
}

.page-about .quote-mark {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.6vw, 1.65rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--volt);
  margin: 0 0 1rem;
}

.page-about .origin-quote p:last-child {
  margin: 0;
  font-size: var(--t-16);
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 数据来源 ---------- */

.page-about .source-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-shot {
  position: relative;
  margin: 0;
  aspect-ratio: 3 / 2;
  background: var(--panel);
  border: 1px solid var(--seam);
  overflow: hidden;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut));
}

.page-about .src-flow {
  list-style: none;
  counter-reset: srcstep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--seam);
  border: 1px solid var(--seam);
}

.page-about .src-flow li {
  counter-increment: srcstep;
  position: relative;
  background: var(--pitch);
  padding: 1.15rem 1.25rem 1.3rem 3.4rem;
  font-size: var(--t-16);
  line-height: 1.72;
  color: var(--mist);
}

.page-about .src-flow li::before {
  content: counter(srcstep, decimal-leading-zero);
  position: absolute;
  left: 1.25rem;
  top: 1.2rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--t-14);
  color: var(--ice);
}

.page-about .src-flow li strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: var(--t-16);
  color: var(--chalk);
}

/* ---------- 团队横向带 ---------- */

.page-about .about-crew {
  padding: 0;
}

.page-about .crew-band {
  margin: clamp(1rem, 3vw, 2rem) 0;
  padding: clamp(3rem, 7vw, 5rem) 0;
  background: linear-gradient(135deg, var(--volt) 0%, var(--volt-soft) 100%);
  color: var(--pitch);
  clip-path: polygon(0 2.5%, 100% 0, 100% 97.5%, 0 100%);
}

.page-about .crew-head .head-num {
  color: var(--pitch);
  opacity: 0.28;
}

.page-about .crew-head .head-title {
  color: var(--pitch);
}

.page-about .crew-head .head-note {
  color: rgba(6, 21, 15, 0.78);
}

.page-about .crew-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

.page-about .crew-card {
  background: rgba(6, 21, 15, 0.05);
  border: 1px solid rgba(6, 21, 15, 0.24);
  padding: 1rem 1.1rem 1.15rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .crew-card:hover {
  background: rgba(6, 21, 15, 0.1);
  transform: translateY(-2px);
}

.page-about .crew-card[open] {
  background: rgba(6, 21, 15, 0.12);
}

.page-about .crew-sum {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew-sum::marker {
  content: "";
}

.page-about .crew-sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--t-18);
  line-height: 1;
  color: rgba(6, 21, 15, 0.6);
}

.page-about .crew-card[open] .crew-sum::after {
  content: "–";
}

.page-about .crew-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3.6vw, 2.2rem);
  line-height: 1;
  color: var(--pitch);
}

.page-about .crew-role {
  font-size: var(--t-16);
  font-weight: 700;
  color: var(--pitch);
}

.page-about .crew-desc {
  margin: 0.85rem 0 0;
  font-size: var(--t-14);
  line-height: 1.72;
  color: rgba(6, 21, 15, 0.8);
}

/* ---------- 时间线 ---------- */

.page-about .tl {
  --tl-pad: 2.5rem;
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--tl-pad);
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.25rem);
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.85rem;
  bottom: 0.85rem;
  width: 2px;
  background: linear-gradient(180deg, var(--volt) 0%, var(--ice) 52%, var(--seam) 100%);
  opacity: 0.55;
}

.page-about .tl-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--seam);
  padding: 1.15rem 1.25rem 1.3rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease);
}

.page-about .tl-item:hover {
  border-color: var(--volt);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--tl-pad));
  top: 1.35rem;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--pitch);
  border: 2px solid var(--volt);
  box-shadow: 0 0 0 4px rgba(232, 255, 58, 0.12);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--t-14);
  line-height: 1;
  padding: 0.32rem 0.6rem;
  margin-bottom: 0.7rem;
  background: var(--volt);
  color: var(--pitch);
}

.page-about .tl-year--live {
  background: var(--flare);
  color: var(--chalk);
}

.page-about .tl-title {
  margin: 0 0 0.45rem;
  font-family: var(--font-body);
  font-size: var(--t-18);
  font-weight: 700;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .tl-text {
  margin: 0;
  font-size: var(--t-16);
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 本地网络 ---------- */

.page-about .net-strip {
  position: relative;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: clamp(2.75rem, 7vw, 5rem) 0;
  overflow: hidden;
  background: var(--panel);
}

.page-about .net-strip > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .net-strip::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(96deg, rgba(6, 21, 15, 0.96) 0%, rgba(6, 21, 15, 0.82) 50%, rgba(6, 21, 15, 0.28) 100%);
}

.page-about .net-strip > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .net-strip-copy {
  max-width: 40rem;
}

.page-about .net-kicker {
  font-family: var(--font-mono);
  font-size: var(--t-14);
  letter-spacing: 0.08em;
  color: var(--ice);
  margin: 0 0 0.75rem;
}

.page-about .net-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.6vw, 2.25rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 0.9rem;
  color: var(--chalk);
}

.page-about .net-text {
  margin: 0;
  font-size: var(--t-16);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .net-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--seam);
  border: 1px solid var(--seam);
  border-top: none;
}

.page-about .net-stats li {
  background: var(--pitch);
  padding: 1.15rem 1.2rem 1.3rem;
}

/* ---------- 收束 ---------- */

.page-about .close-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .close-copy .head-title {
  margin-bottom: 1.4rem;
}

.page-about .close-copy .list-tick {
  margin: 0;
}

.page-about .promise-card {
  display: grid;
  gap: 0.85rem;
  align-content: start;
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--panel);
  border: 1px solid var(--seam);
  border-top: 3px solid var(--ice);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .promise-title {
  margin: 0;
  font-size: var(--t-18);
  font-weight: 700;
  color: var(--chalk);
}

.page-about .promise-text {
  margin: 0;
  font-size: var(--t-16);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .promise-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--t-14);
  color: var(--ice);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .net-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
  }

  .page-about .head-num {
    padding-top: 0.15rem;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .hero-lead {
    font-size: var(--t-18);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .source-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .close-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .tl {
    --tl-pad: 0;
    --tl-gap: clamp(3rem, 7vw, 6rem);
    padding-left: 0;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: var(--tl-gap);
  }

  .page-about .tl::before {
    left: calc(50% - 1px);
  }

  .page-about .tl-item {
    grid-column: 1;
  }

  .page-about .tl-item:nth-child(even) {
    grid-column: 2;
  }

  .page-about .tl-item::before {
    left: auto;
    right: calc(var(--tl-gap) / -2 - 8px);
  }

  .page-about .tl-item:nth-child(even)::before {
    right: auto;
    left: calc(var(--tl-gap) / -2 - 8px);
  }
}

@media (min-width: 1080px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-card,
  .page-about .tl-item {
    transition: none;
  }

  .page-about .crew-card:hover {
    transform: none;
  }
}