.page-contact {
  --pc-gap: clamp(20px, 3vw, 34px);
  --pc-ink-soft: #47617C;
  position: relative;
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-contact .gg-breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 01 开场 ---------- */
.page-contact .pc-intro {
  position: relative;
  overflow: hidden;
}
.page-contact .pc-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127, 233, 255, 0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 233, 255, 0.075) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(120% 90% at 80% 16%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 90% at 80% 16%, #000 0%, transparent 74%);
  pointer-events: none;
  z-index: 0;
}
.page-contact .pc-intro__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}
.page-contact .pc-intro__meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-contact .pc-intro__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .pc-intro__body {
  max-width: 74ch;
}
.page-contact .gg-display {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}
.page-contact .pc-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .pc-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 18px;
  background: var(--gg-abyss);
  border-left: 3px solid var(--gg-cyan);
}
.page-contact .pc-fact__k {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gg-graphite);
}
.page-contact .pc-fact__v {
  font-size: 1rem;
  color: var(--gg-white);
  line-height: 1.6;
}

/* ---------- 02 合作方向 ---------- */
.page-contact .pc-tracks {
  position: relative;
  overflow: hidden;
}
.page-contact .pc-tracks__art {
  position: absolute;
  right: -8%;
  bottom: -14%;
  width: min(720px, 82%);
  opacity: 0.13;
  pointer-events: none;
  z-index: 0;
}
.page-contact .pc-tracks__art img {
  display: block;
  width: 100%;
  height: auto;
}
.page-contact .pc-tracks .gg-container {
  position: relative;
  z-index: 1;
}
.page-contact .pc-head {
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-contact .pc-head .gg-title {
  margin: 10px 0 14px;
}
.page-contact .pc-track-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-contact .pc-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-content: start;
}
.page-contact .pc-track__title {
  margin: 8px 0 10px;
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  line-height: 1.35;
  color: var(--gg-white);
}
.page-contact .pc-track__lead {
  margin: 0;
  color: var(--gg-graphite);
  line-height: 1.72;
}
.page-contact .pc-fold {
  border-top: var(--gg-bw) solid var(--gg-line-soft);
  padding-top: 14px;
}
.page-contact .pc-fold summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gg-cyan);
}
.page-contact .pc-fold summary::-webkit-details-marker {
  display: none;
}
.page-contact .pc-fold summary::before {
  content: "+";
  font-family: var(--gg-font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gg-coral);
}
.page-contact .pc-fold[open] summary::before {
  content: "−";
}
.page-contact .pc-fold summary:hover {
  color: var(--gg-cyan-soft);
}
.page-contact .pc-fold summary:focus-visible,
.page-contact .pc-qa summary:focus-visible {
  outline: 2px solid var(--gg-coral);
  outline-offset: 3px;
}
.page-contact .pc-spec {
  display: grid;
  gap: 12px;
  margin: 14px 0 0;
}
.page-contact .pc-spec > div {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 10px;
}
.page-contact .pc-spec dt {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gg-graphite);
}
.page-contact .pc-spec dd {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--gg-white);
}

/* ---------- 03 推进节奏 ---------- */
.page-contact .pc-flow .gg-title,
.page-contact .pc-flow .gg-lede {
  color: var(--gg-ink);
}
.page-contact .pc-flow .gg-lede {
  color: var(--pc-ink-soft);
}
.page-contact .gg-section--ice.pc-flow {
  background-image:
    linear-gradient(rgba(11, 37, 69, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 37, 69, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
}
.page-contact .pc-flow__art {
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  overflow: hidden;
  border: var(--gg-bw) solid var(--gg-ink);
  box-shadow: 8px 8px 0 rgba(11, 37, 69, 0.18);
  background: var(--gg-deep);
}
.page-contact .pc-flow__art img {
  display: block;
  width: 100%;
  height: auto;
}
.page-contact .pc-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--gg-bw) solid var(--gg-ink);
}
.page-contact .pc-step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 6px 18px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(7, 19, 32, 0.16);
  transition: background-color 0.2s ease;
}
.page-contact .pc-step:hover {
  background: rgba(0, 229, 255, 0.1);
}
.page-contact .pc-step__num {
  justify-self: start;
  margin: 0;
  font-family: var(--gg-font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--gg-coral);
  font-variant-numeric: tabular-nums;
}
.page-contact .pc-step__title {
  margin: 0 0 8px;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--gg-ink);
}
.page-contact .pc-step__text {
  margin: 0 0 10px;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--pc-ink-soft);
}
.page-contact .pc-step__meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: #1F5C7A;
}

/* ---------- 04 平台能力 ---------- */
.page-contact .pc-cap__list {
  display: grid;
  border-top: var(--gg-bw) solid var(--gg-line);
}
.page-contact .pc-cap__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 26px 0;
  border-bottom: var(--gg-bw) solid var(--gg-line-soft);
}
.page-contact .pc-cap__title {
  margin: 0 0 8px;
  font-size: clamp(1.1rem, 1.7vw, 1.35rem);
  line-height: 1.4;
  color: var(--gg-white);
}
.page-contact .pc-cap__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.76;
  color: var(--gg-graphite);
}
.page-contact .pc-cap__num {
  margin: 0;
  font-size: 0.95rem;
  color: var(--gg-white);
}
.page-contact .pc-cap__num .gg-num {
  font-size: 1.35rem;
}

/* ---------- 05 联系方式 ---------- */
.page-contact .pc-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
}
.page-contact .pc-contact__text {
  margin: 0 0 16px;
  line-height: 1.78;
  color: var(--gg-white);
}
.page-contact .pc-contact__text a,
.page-contact .pc-contact__lead a {
  color: var(--gg-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-contact .pc-contact__lead a:hover {
  color: var(--gg-cyan-soft);
}
.page-contact .pc-panel {
  border-color: var(--gg-line-strong);
}
.page-contact .pc-rows {
  display: grid;
  gap: 10px;
}
.page-contact .pc-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 15px 18px;
  background: var(--gg-abyss);
  border: var(--gg-bw) solid var(--gg-line-soft);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.page-contact .pc-row:hover {
  border-color: var(--gg-line-strong);
  transform: translateY(-2px);
}
.page-contact .pc-row__key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gg-graphite);
}
.page-contact .pc-row__val {
  color: var(--gg-white);
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.page-contact .pc-row__val--mono {
  font-family: var(--gg-font-mono);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color: var(--gg-cyan);
}

/* ---------- 06 常见问题 ---------- */
.page-contact .pc-faq .gg-title {
  color: var(--gg-ink);
}
.page-contact .pc-faq__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 54px);
}
.page-contact .pc-faq__head .gg-lede {
  margin-top: 12px;
  color: var(--pc-ink-soft);
}
.page-contact .pc-faq__list {
  border-top: var(--gg-bw) solid var(--gg-ink);
}
.page-contact .pc-qa {
  border-bottom: 1px solid rgba(7, 19, 32, 0.16);
}
.page-contact .pc-qa summary {
  position: relative;
  padding: 18px 38px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--gg-ink);
}
.page-contact .pc-qa summary::-webkit-details-marker {
  display: none;
}
.page-contact .pc-qa summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--gg-font-mono);
  font-size: 1.25rem;
  color: var(--gg-coral);
}
.page-contact .pc-qa[open] summary::after {
  content: "−";
}
.page-contact .pc-qa summary:hover {
  color: #0F4C6E;
}
.page-contact .pc-qa p {
  margin: 0 0 20px;
  max-width: 72ch;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--pc-ink-soft);
}

/* ---------- 选项卡式布局 ---------- */
.page-contact .pc-track__body {
  min-width: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: var(--gg-bw) solid var(--gg-line);
    border-bottom: var(--gg-bw) solid var(--gg-line);
  }
  .page-contact .pc-fact {
    background: transparent;
    border-left: var(--gg-bw) solid var(--gg-line-soft);
    padding: 18px 22px;
  }
  .page-contact .pc-fact:first-child {
    border-left: 0;
    padding-left: 0;
  }
  .page-contact .pc-row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 18px;
    align-items: center;
  }
}

@media (min-width: 880px) {
  .page-contact .pc-intro__grid {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(30px, 5vw, 72px);
    align-items: start;
  }
  .page-contact .pc-track-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 22px;
  }
  .page-contact .pc-track--a {
    grid-column: span 7;
  }
  .page-contact .pc-track--b {
    grid-column: span 5;
  }
  .page-contact .pc-track--c {
    grid-column: span 12;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(22px, 3vw, 48px);
    align-items: center;
    margin-top: 4px;
  }
  .page-contact .pc-steps {
    position: relative;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 0;
  }
  .page-contact .pc-steps::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 26px;
    height: 2px;
    background: linear-gradient(90deg, var(--gg-cyan), var(--gg-coral));
    opacity: 0.42;
  }
  .page-contact .pc-step {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px 22px 30px;
    border-bottom: 0;
    border-left: var(--gg-bw) solid rgba(7, 19, 32, 0.16);
  }
  .page-contact .pc-step:first-child {
    border-left: 0;
    padding-left: 0;
  }
  .page-contact .pc-step__num {
    position: relative;
    z-index: 1;
    padding-right: 12px;
    background: var(--gg-ice);
  }
  .page-contact .pc-cap__item {
    grid-template-columns: 170px minmax(0, 1fr) 250px;
    gap: 28px;
    align-items: baseline;
    padding: 30px 0;
  }
  .page-contact .pc-cap__num {
    text-align: right;
  }
}

@media (min-width: 940px) {
  .page-contact .pc-contact__grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
  .page-contact .pc-panel {
    margin-top: 40px;
  }
  .page-contact .pc-faq__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-row,
  .page-contact .pc-step {
    transition: none;
  }
  .page-contact .pc-row:hover {
    transform: none;
  }
}