.page-contact{
  --pc-hair: 2px;
  --pc-cyan-glow: rgba(0, 240, 255, 0.14);
  background:
    radial-gradient(880px 460px at 92% -8%, rgba(0, 240, 255, 0.08), transparent 66%),
    radial-gradient(640px 420px at -6% 34%, rgba(36, 26, 74, 0.6), transparent 72%),
    var(--ink-800);
  color: var(--mist);
  overflow-wrap: break-word;
}

.page-contact .breadcrumb{
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lilac);
}

.page-contact .pc-intro{
  padding-block: 20px 44px;
  border-bottom: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-intro__grid{
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-contact .pc-eyebrow{
  display: inline-block;
  margin: 0 0 16px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--ink-600);
  border-left: 3px solid var(--cyan);
}

.page-contact .pc-eyebrow--amber{
  color: var(--amber);
  border-left-color: var(--amber);
}

.page-contact h1{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(38px, 8.6vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-contact .pc-lead{
  margin: 22px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-intro__actions{
  margin-top: 26px;
}

.page-contact .pc-intro__media{
  margin: 0;
  border: var(--pc-hair) solid var(--ink-600);
  box-shadow: var(--shadow-hard);
  background: var(--ink-700);
  overflow: hidden;
}

.page-contact .pc-intro__media img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 双栏骨架 ---------- */

.page-contact .pc-layout{
  display: grid;
  gap: 32px;
  padding-block: 44px 64px;
}

.page-contact .pc-main{
  display: grid;
  gap: 56px;
  min-width: 0;
}

.page-contact .pc-aside{
  order: -1;
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-contact .pc-block__head{
  padding-bottom: 18px;
  border-bottom: var(--pc-hair) solid var(--ink-600);
  margin-bottom: 26px;
}

.page-contact .pc-block__head h2{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .pc-block__head p{
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lilac);
}

/* ---------- 合作类型折叠组 ---------- */

.page-contact .pc-coop__item{
  margin-bottom: 14px;
  background: var(--ink-700);
  border: var(--pc-hair) solid var(--ink-600);
  box-shadow: var(--shadow-soft, 6px 6px 0 rgba(0, 0, 0, 0.45));
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-contact .pc-coop__item[open]{
  border-color: var(--teal);
  box-shadow: 8px 8px 0 var(--pc-cyan-glow);
}

.page-contact .pc-coop__item summary{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-contact .pc-coop__item summary::-webkit-details-marker{
  display: none;
}

.page-contact .pc-coop__no{
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-900);
  background: var(--cyan);
}

.page-contact .pc-coop__item[open] .pc-coop__no{
  background: var(--amber);
}

.page-contact .pc-coop__name{
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-contact .pc-coop__hint{
  grid-column: 1 / -1;
  padding-left: 38px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--lilac);
}

.page-contact .pc-coop__item summary::after{
  content: "展开";
  justify-self: end;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  border: 1px solid var(--ink-600);
}

.page-contact .pc-coop__item[open] summary::after{
  content: "收起";
  color: var(--amber);
  border-color: var(--amber);
}

.page-contact .pc-coop__body{
  padding: 0 18px 20px;
  border-top: 1px solid var(--ink-600);
  margin-top: 4px;
}

.page-contact .pc-coop__body p{
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-coop__body a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--teal);
}

.page-contact .pc-coop__body a:hover,
.page-contact .pc-coop__body a:focus-visible{
  color: var(--ink-900);
  background: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .pc-prep{
  margin: 16px 0 0;
  padding: 14px 16px;
  list-style: none;
  display: grid;
  gap: 9px;
  background: var(--ink-800);
  border-left: 3px solid var(--teal);
}

.page-contact .pc-prep li{
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .pc-prep li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: var(--pc-hair);
  background: var(--cyan);
}

/* ---------- 三项准备 ---------- */

.page-contact .pc-steps{
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-steps li{
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-steps__no{
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
  padding-top: 3px;
}

.page-contact .pc-steps h3{
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
  line-height: 1.4;
}

.page-contact .pc-steps p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--lilac);
}

.page-contact .pc-steps a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--teal);
}

.page-contact .pc-steps a:hover,
.page-contact .pc-steps a:focus-visible{
  color: var(--ink-900);
  background: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应数据 ---------- */

.page-contact .pc-stats{
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  border-top: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-stats > div{
  padding: 18px 0;
  border-bottom: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-stats dt{
  font-size: 13px;
  line-height: 1.6;
  color: var(--lilac);
}

.page-contact .pc-stats dd{
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-contact .pc-note{
  margin-top: 24px;
  padding: 20px;
  display: grid;
  gap: 14px;
  background: var(--ink-700);
  border-left: 3px solid var(--amber);
}

.page-contact .pc-note p{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-note a{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--teal);
}

.page-contact .pc-note a:hover,
.page-contact .pc-note a:focus-visible{
  color: var(--ink-900);
  background: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 右侧联系铭牌 ---------- */

.page-contact .pc-card{
  background: var(--ink-900);
  border: var(--pc-hair) solid var(--teal);
  box-shadow: 10px 10px 0 var(--pc-cyan-glow);
}

.page-contact .pc-card__media{
  margin: 0;
  border-bottom: var(--pc-hair) solid var(--ink-600);
  background: var(--ink-700);
  overflow: hidden;
}

.page-contact .pc-card__media img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .pc-card__body{
  padding: 22px 20px 24px;
}

.page-contact .pc-card__body h2{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 30px;
  line-height: 1.15;
  color: var(--white);
}

.page-contact .pc-card__lead{
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--lilac);
}

.page-contact .pc-plate{
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-plate li{
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 2px 12px;
  padding: 14px 0;
  border-bottom: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-plate__icon{
  padding-top: 3px;
  color: var(--cyan);
}

.page-contact .pc-plate__icon svg{
  width: 18px;
  height: 18px;
  display: block;
}

.page-contact .pc-plate__body{
  min-width: 0;
}

.page-contact .pc-plate__key{
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lilac);
}

.page-contact .pc-plate__text{
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--white);
}

.page-contact .pc-plate__val{
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 7px 9px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  text-align: left;
  color: var(--white);
  background: var(--ink-700);
  border: 1px solid var(--ink-600);
  cursor: pointer;
  overflow-wrap: anywhere;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.page-contact .pc-plate__val:hover,
.page-contact .pc-plate__val:focus-visible{
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}

.page-contact .pc-plate__val[data-copied="true"]{
  background: var(--teal);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-contact .pc-copy-status{
  min-height: 1.4em;
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  color: var(--cyan);
}

.page-contact .pc-version{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: var(--pc-hair) solid var(--ink-600);
}

.page-contact .pc-version__key{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lilac);
}

.page-contact .pc-copy-btn{
  margin-left: auto;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--ink-600);
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.page-contact .pc-copy-btn:hover,
.page-contact .pc-copy-btn:focus-visible{
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  outline: none;
}

.page-contact .pc-copy-btn[data-copied="true"]{
  background: var(--teal);
  border-color: var(--teal);
  color: var(--ink-900);
}

.page-contact .pc-card__note{
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--lilac);
  padding-left: 10px;
  border-left: 2px solid var(--amber);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px){
  .page-contact .pc-stats{
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .pc-stats > div{
    padding-right: 18px;
  }
}

@media (min-width: 900px){
  .page-contact .pc-intro{
    padding-block: 28px 56px;
  }

  .page-contact .pc-intro__grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: end;
  }

  .page-contact .pc-layout{
    grid-template-columns: minmax(0, 1fr) 372px;
    gap: 56px;
    align-items: start;
    padding-block: 64px 88px;
  }

  .page-contact .pc-aside{
    order: 0;
    position: sticky;
    top: 28px;
  }

  .page-contact .pc-block__head p{
    font-size: 16px;
  }
}

@media (min-width: 1200px){
  .page-contact .pc-layout{
    grid-template-columns: minmax(0, 1fr) 400px;
    gap: 72px;
  }
}