.page-about {
  --about-line: rgba(201, 209, 217, 0.32);
  --about-line-soft: rgba(201, 209, 217, 0.16);
  --about-cream-line: rgba(58, 42, 34, 0.26);
  --about-soft: rgba(255, 255, 255, 0.78);
  background: var(--ink);
  color: var(--white);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

.page-about .about-band {
  margin-top: clamp(40px, 6vw, 78px);
}

.page-about .band-head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .band-head h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.page-about .band-head p {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(14px, 2vw, 26px);
  padding: clamp(22px, 4vw, 54px);
  border: var(--edge) solid var(--brown);
  background:
    radial-gradient(130% 150% at 0% 0%, rgba(225, 37, 27, 0.2), transparent 58%),
    var(--ink-2);
  box-shadow: 10px 10px 0 rgba(225, 37, 27, 0.3);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 10px;
  background: linear-gradient(180deg, var(--red) 0%, var(--ember) 55%, var(--amber) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 190px;
  height: 190px;
  background: rgba(24, 214, 208, 0.14);
  transform: rotate(38deg);
  pointer-events: none;
}

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

.page-about h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.6vw, 60px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  max-width: 19ch;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-spec {
  position: relative;
  z-index: 1;
  align-self: start;
  padding: clamp(16px, 2.4vw, 22px);
  border: var(--edge) solid var(--about-line);
  background: rgba(42, 49, 60, 0.66);
}

.page-about .about-spec__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--about-line-soft);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--amber);
}

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

.page-about .about-spec__list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--about-line-soft);
}

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

.page-about .about-spec__list .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.page-about .about-spec__list strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
}

/* ---------- 奶油纸面板 ---------- */
.page-about .band-cream {
  padding: clamp(22px, 4vw, 48px);
  border: var(--edge) solid var(--brown);
  background: var(--cream);
  color: var(--brown);
  box-shadow: 8px 8px 0 rgba(11, 14, 19, 0.6);
}

.page-about .band-cream .band-head p {
  color: rgba(58, 42, 34, 0.84);
}

.page-about .band-cream .eyebrow {
  color: var(--red);
}

/* ---------- 定位要点 ---------- */
.page-about .fact-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .fact {
  padding: 14px 16px;
  border: 2px solid var(--about-cream-line);
  border-left: 6px solid var(--red);
  background: rgba(255, 255, 255, 0.55);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), border-left-color 0.18s var(--ease);
}

.page-about .fact:hover {
  transform: translate(-2px, -2px);
  border-left-color: var(--ember);
  box-shadow: 5px 5px 0 rgba(58, 42, 34, 0.35);
}

.page-about .fact__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(58, 42, 34, 0.62);
}

.page-about .fact__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.68;
}

/* ---------- 版本时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--red) 48%, var(--amber) 100%);
}

.page-about .tl-node {
  position: relative;
  padding: clamp(16px, 2.4vw, 24px);
  border: var(--edge) solid var(--about-line);
  background: var(--panel);
  box-shadow: 6px 6px 0 rgba(11, 14, 19, 0.92);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 24px;
  width: 16px;
  height: 16px;
  background: var(--amber);
  border: var(--edge) solid var(--ink);
  transform: rotate(45deg);
}

.page-about .tl-node:hover,
.page-about .tl-node:focus-within {
  transform: translate(-3px, -3px);
  border-color: var(--ember);
  box-shadow: 9px 9px 0 rgba(225, 37, 27, 0.5);
}

.page-about .tl-node__ver {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .tl-node__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.2;
}

.page-about .tl-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--about-soft);
}

.page-about .tl-node__more {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--about-line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--cyan);
}

/* ---------- 图片容器 ---------- */
.page-about .about-media {
  position: relative;
  margin: clamp(20px, 3vw, 34px) 0 0;
  border: var(--edge) solid var(--brown);
  background: var(--ink-2);
  overflow: hidden;
  box-shadow: 9px 9px 0 rgba(225, 37, 27, 0.26);
}

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

.page-about .about-media--service {
  box-shadow: 9px 9px 0 rgba(58, 42, 34, 0.5);
}

.page-about .about-media--team {
  box-shadow: 9px 9px 0 rgba(24, 214, 208, 0.3);
}

.page-about .about-media__tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 5px 10px;
  border: 2px solid var(--brown);
  background: var(--cream);
  color: var(--brown);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 服务线 ---------- */
.page-about .svc-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .svc {
  position: relative;
  padding: 18px 18px 16px 50px;
  border: 2px solid var(--brown);
  background: rgba(255, 255, 255, 0.6);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .svc:hover {
  transform: translate(-2px, -2px);
  background: var(--white);
  box-shadow: 6px 6px 0 var(--brown);
}

.page-about .svc__idx {
  position: absolute;
  left: 15px;
  top: 17px;
  font-size: 14px;
  font-weight: 700;
  color: var(--red);
}

.page-about .svc__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.25;
}

.page-about .svc__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(58, 42, 34, 0.86);
}

.page-about .svc-tail {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 14px 16px;
  border-left: 6px solid var(--cyan);
  background: rgba(58, 42, 34, 0.08);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .svc-tail a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .svc-tail a:hover {
  color: var(--brown);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .team-card {
  padding: 18px;
  border: var(--edge) solid var(--about-line);
  background: var(--ink-2);
  box-shadow: 6px 6px 0 rgba(24, 214, 208, 0.2);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .team-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 rgba(24, 214, 208, 0.42);
}

.page-about .team-card__idx {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .team-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.25;
}

.page-about .team-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-soft);
}

.page-about .team-card__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .team-card__text a:hover {
  color: var(--white);
}

/* ---------- 覆盖与保障 ---------- */
.page-about .cover-panel {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  grid-template-columns: 1fr;
}

.page-about .cover-grid {
  position: relative;
  height: clamp(132px, 20vw, 176px);
  border: var(--edge) solid var(--about-cream-line);
  background-color: rgba(58, 42, 34, 0.1);
  background-image: radial-gradient(circle, rgba(58, 42, 34, 0.42) 2px, transparent 2.5px);
  background-size: 26px 26px;
  overflow: hidden;
}

.page-about .cover-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, transparent 40%, rgba(225, 37, 27, 0.42) 50%, transparent 60%);
}

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

.page-about .cover-list li {
  padding: 12px 14px;
  border: 2px solid var(--about-cream-line);
  background: rgba(255, 255, 255, 0.5);
  font-size: 15px;
  line-height: 1.68;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .cover-list li:hover {
  background: var(--white);
  border-color: var(--brown);
}

.page-about .cover-list .mono {
  display: inline-block;
  min-width: 5.4em;
  margin-right: 8px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--red);
}

/* ---------- 页尾指引 ---------- */
.page-about .about-next {
  padding: clamp(22px, 4vw, 42px);
  border: var(--edge) solid var(--brown);
  background: linear-gradient(150deg, #12161D 0%, #0B0E13 70%);
  box-shadow: 10px 10px 0 rgba(242, 181, 68, 0.32);
}

.page-about .about-next__title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.15;
}

.page-about .next-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .next-card {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: 2px solid var(--about-line);
  background: rgba(42, 49, 60, 0.55);
  color: var(--white);
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  background: rgba(42, 49, 60, 0.95);
}

.page-about .next-card__idx {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .next-card__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.3;
}

.page-about .next-card__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .fact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .next-grid {
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .cover-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: stretch;
  }

  .page-about .cover-grid {
    height: 100%;
    min-height: 200px;
  }
}

@media (min-width: 860px) {
  .page-about .timeline {
    padding-left: 46px;
    gap: 22px;
  }

  .page-about .timeline::before {
    left: 12px;
  }

  .page-about .tl-node::before {
    left: -42px;
    width: 18px;
    height: 18px;
  }

  .page-about .tl-node:nth-child(even) {
    margin-left: clamp(24px, 6vw, 76px);
  }

  .page-about .team-card:nth-child(even) {
    margin-top: 28px;
  }
}

@media (max-width: 560px) {
  .page-about .about-hero {
    padding: 22px 18px 24px 26px;
  }

  .page-about .band-cream {
    padding: 20px 16px;
  }

  .page-about .about-next {
    padding: 20px 16px;
  }

  .page-about .svc {
    padding: 16px 14px 14px 44px;
  }

  .page-about .svc__idx {
    left: 12px;
    top: 15px;
  }

  .page-about .cover-list .mono {
    display: block;
    margin: 0 0 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .fact,
  .page-about .svc,
  .page-about .team-card,
  .page-about .tl-node,
  .page-about .next-card,
  .page-about .cover-list li {
    transition: none;
  }

  .page-about .fact:hover,
  .page-about .svc:hover,
  .page-about .team-card:hover,
  .page-about .tl-node:hover,
  .page-about .tl-node:focus-within,
  .page-about .next-card:hover,
  .page-about .next-card:focus-visible {
    transform: none;
  }
}