/* ============ 品牌档案 /company/ ============ */

.page-about {
  --about-rail: 132px;
  --about-gutter: clamp(1rem, 3.2vw, 2.4rem);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 0 0 clamp(1rem, 3vw, 1.75rem);
  padding-top: clamp(1rem, 3vw, 1.5rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.5rem, 5vw, 3.25rem) 0 clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: -34%;
  height: 82%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(115% 78% at 14% 4%, rgba(27, 58, 94, 0.95) 0%, rgba(10, 14, 26, 0) 62%),
    radial-gradient(72% 58% at 92% 10%, rgba(0, 255, 157, 0.16) 0%, rgba(10, 14, 26, 0) 60%),
    linear-gradient(122deg, rgba(58, 134, 255, 0.16) 0%, rgba(10, 14, 26, 0) 56%);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 0 100%);
}

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

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 0.55rem 0 1rem;
  font-family: var(--ff-display);
  font-size: clamp(2.05rem, 6.6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.005em;
  color: var(--text);
}

.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  color: var(--neon);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figure {
  padding: 0.9rem 1rem 1rem;
  background: var(--panel);
}

.page-about .about-figure__num {
  display: block;
  font-family: var(--ff-mono);
  font-size: clamp(1.5rem, 4.6vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-figure__num--blue {
  color: var(--blue);
}

.page-about .about-figure__num--orange {
  color: var(--orange);
}

.page-about .about-figure__num--amber {
  color: var(--amber);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* ---------- 正文行：左侧编号脊 + 右侧内容 ---------- */
.page-about .about-row {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.5rem, 4.2vw, 2.6rem) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-row__rail {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}

.page-about .about-row__num {
  font-family: var(--ff-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-row__label {
  font-family: var(--ff-serif);
  font-size: 1.0625rem;
  letter-spacing: 0.03em;
  color: var(--text);
}

.page-about .about-row__main {
  min-width: 0;
}

.page-about .about-row__title {
  margin: 0 0 1rem;
  font-family: var(--ff-display);
  font-size: clamp(1.5rem, 3.9vw, 2.125rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.002em;
  color: var(--text);
}

.page-about .about-row__main p {
  margin: 0 0 1rem;
  max-width: 68ch;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--muted);
}

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

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

.page-about .about-row__main a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .about-row__main a:hover,
.page-about .about-row__main a:focus-visible {
  color: var(--neon);
}

.page-about .about-row__note {
  margin-top: 1.1rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--line);
  font-size: 0.9375rem;
}

/* ---------- 档案抽屉 ---------- */
.page-about .about-dossiers {
  margin-top: 1.4rem;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-dossier {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-dossier summary {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.18s var(--ease);
}

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

.page-about .about-dossier summary::before {
  content: "+";
  flex: none;
  width: 1rem;
  font-family: var(--ff-mono);
  font-size: 1rem;
  line-height: 1;
  text-align: center;
  color: var(--neon);
}

.page-about .about-dossier[open] summary::before {
  content: "\2013";
}

.page-about .about-dossier[open] summary {
  color: var(--neon);
}

.page-about .about-dossier__body {
  padding: 0 1rem 1rem 2.7rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 栏目索引 ---------- */
.page-about .about-channels {
  counter-reset: ch;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
  gap: 0.5rem;
  margin: 1.35rem 0 1.35rem;
  padding: 0;
  list-style: none;
}

.page-about .about-channel {
  position: relative;
  padding: 0.62rem 0.75rem 0.62rem 2.2rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--text);
  transition: border-color 0.18s var(--ease);
}

.page-about .about-channel::before {
  counter-increment: ch;
  content: counter(ch, decimal-leading-zero);
  position: absolute;
  left: 0.72rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--ff-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-about .about-channel:hover {
  border-color: var(--blue);
}

/* ---------- 赛制带 ---------- */
.page-about .about-tracks {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-track {
  display: grid;
  gap: 0.3rem;
  padding: 0.95rem 1rem;
  background: var(--panel);
}

.page-about .about-track strong {
  font-family: var(--ff-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-track span {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 三步流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 0.85rem;
  margin: 1.35rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  padding: 1.05rem 1.05rem 1.2rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  border-radius: var(--radius);
}

.page-about .about-step__idx {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--ff-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-step__title {
  margin: 0 0 0.45rem;
  font-family: var(--ff-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow-figure {
  margin: 0 0 1.2rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  position: relative;
}

.page-about .about-flow-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--blue) 54%, var(--orange) 100%);
  z-index: 1;
}

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

.page-about .about-flow-figure .figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 2.75rem 1rem 0.9rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(180deg, rgba(10, 14, 26, 0) 0%, rgba(10, 14, 26, 0.9) 62%);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco-figure {
  margin: 1.4rem 0 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-eco-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-eco-figure .figure__caption {
  margin: 0;
  padding: 0.7rem 1rem 0.8rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.page-about .about-clients {
  display: grid;
  gap: 1px;
  margin: 0 0 1.35rem;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-client {
  display: grid;
  gap: 0.25rem;
  padding: 0.9rem 1rem;
  background: var(--panel);
}

.page-about .about-client__k {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-about .about-client__v {
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 里程碑 ---------- */
.page-about .about-mile {
  position: relative;
  margin-top: clamp(1rem, 3vw, 1.75rem);
  padding: clamp(2rem, 5.5vw, 3.25rem) 0 clamp(2rem, 5.5vw, 3.25rem);
  background:
    radial-gradient(90% 70% at 88% 0%, rgba(58, 134, 255, 0.13) 0%, rgba(10, 14, 26, 0) 62%),
    linear-gradient(180deg, rgba(18, 26, 46, 0.55) 0%, rgba(10, 14, 26, 0) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-mile__head {
  max-width: 68ch;
}

.page-about .about-mile__lede {
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.3rem 0 clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-years__item {
  padding: 0.34rem 0.72rem;
  font-family: var(--ff-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-years__item:hover,
.page-about .about-years__item:focus-visible {
  color: var(--ink);
  background: var(--neon);
  border-color: var(--neon);
}

.page-about .about-mile__grid {
  display: grid;
  gap: var(--about-gutter);
}

.page-about .about-mile__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-about .about-mile__list {
  position: relative;
  display: grid;
  gap: clamp(1.2rem, 3vw, 1.7rem);
  margin: 0;
  padding: 0 0 0 1.5rem;
  list-style: none;
}

.page-about .about-mile__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--blue) 54%, var(--orange) 100%);
}

.page-about .about-mile__item {
  position: relative;
  scroll-margin-top: 6.5rem;
}

.page-about .about-mile__item::before {
  content: "";
  position: absolute;
  left: calc(-1.5rem - 4px);
  top: 0.5rem;
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--neon);
}

.page-about .about-mile__item:nth-child(even)::before {
  border-color: var(--orange);
}

.page-about .about-mile__year {
  display: inline-block;
  margin-bottom: 0.28rem;
  font-family: var(--ff-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-about .about-mile__item:nth-child(even) .about-mile__year {
  color: var(--orange);
}

.page-about .about-mile__title {
  margin: 0 0 0.4rem;
  font-family: var(--ff-serif);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.42;
  color: var(--text);
}

.page-about .about-mile__body {
  margin: 0;
  max-width: 54ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 资质与联系 ---------- */
.page-about .about-legal {
  margin-top: clamp(1.75rem, 5vw, 3rem);
  padding: clamp(1.25rem, 3.6vw, 2.25rem);
  background: linear-gradient(158deg, rgba(18, 26, 46, 0.96) 0%, rgba(10, 14, 26, 0.62) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-legal__lede {
  margin: 0 0 1.35rem;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-contact {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-contact__row {
  display: grid;
  gap: 0.22rem;
  padding: 0.85rem 1rem;
  background: var(--panel);
}

.page-about .about-contact__k {
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-contact__v {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text);
  overflow-wrap: anywhere;
}

/* ---------- 结束引导 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.35rem, 3.5vw, 2rem);
  padding-top: clamp(1.2rem, 3vw, 1.65rem);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__text {
  margin: 0;
  font-family: var(--ff-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-contact__row {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }

  .page-about .about-track {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 780px) {
  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gutter);
  }

  .page-about .about-row__rail {
    position: sticky;
    top: 6rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
    align-self: start;
  }

  .page-about .about-mile__grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.35fr);
    align-items: start;
  }

  .page-about .about-mile__visual {
    position: sticky;
    top: 6.5rem;
  }
}

@media (min-width: 1160px) {
  .page-about .about-row {
    grid-template-columns: 160px minmax(0, 1fr);
  }

  .page-about .about-track {
    grid-template-columns: 200px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dossier summary,
  .page-about .about-channel,
  .page-about .about-years__item {
    transition: none;
  }
}