.page-contact {
  --pc-card-r: var(--radius-panel);
  padding-top: calc(var(--header-h) + 12px);
}

.page-contact img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  padding: 28px 0 64px;
  position: relative;
}

.page-contact .pc-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: end;
}

.page-contact .pc-hero__title {
  font-size: clamp(2.2rem, 8.4vw, 4.4rem);
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
  color: var(--text-900);
}

.page-contact .pc-hero__lead {
  max-width: 54ch;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-300);
}

.page-contact .pc-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-500);
  background: var(--ink-850);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--text-900);
  transition: background-color 220ms var(--ease), border-color 220ms var(--ease), color 220ms var(--ease);
}

.page-contact .pc-chip--signal:hover {
  background: var(--signal-500);
  border-color: var(--signal-500);
  color: var(--paper-50);
}

.page-contact .pc-chip--cyan:hover {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
}

.page-contact .pc-chip--mint:hover {
  background: var(--mint-400);
  border-color: var(--mint-400);
  color: var(--ink-950);
}

.page-contact .pc-hero__figure {
  margin: 0;
  border: 1px solid var(--line-500);
  border-radius: var(--pc-card-r);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-850), var(--ink-950));
  box-shadow: var(--shadow-panel);
}

.page-contact .pc-hero__figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* ---------- 区块通用 ---------- */
.page-contact .pc-block {
  padding: 56px 0;
  border-top: 1px solid var(--line-500);
}

.page-contact .pc-head {
  margin-bottom: 36px;
  max-width: 64ch;
}

/* ---------- 合作方向 ---------- */
.page-contact .pc-dirs {
  row-gap: 20px;
}

.page-contact .pc-dir {
  --pc-dir-accent: var(--signal-500);
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 24px 26px;
  border: 1px solid var(--line-500);
  border-radius: var(--pc-card-r);
  background: var(--ink-850);
  box-shadow: var(--shadow-panel);
  transition: transform 320ms var(--ease), border-color 320ms var(--ease);
}

.page-contact .pc-dir::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: var(--pc-card-r) var(--pc-card-r) 0 0;
  background: linear-gradient(90deg, var(--pc-dir-accent), transparent 76%);
}

.page-contact .pc-dir--cyan { --pc-dir-accent: var(--cyan-400); }
.page-contact .pc-dir--mint { --pc-dir-accent: var(--mint-400); }

.page-contact .pc-dir:hover {
  transform: translateY(-3px);
  border-color: var(--pc-dir-accent);
}

.page-contact .pc-dir__idx {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--pc-dir-accent);
}

.page-contact .pc-dir__title {
  margin: 0 0 8px;
  font-size: 21px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--text-900);
}

.page-contact .pc-dir__for {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--text-300);
}

.page-contact .pc-dir__body {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-300);
}

.page-contact .pc-dir__list {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-500);
}

.page-contact .pc-dir__list li {
  position: relative;
  padding: 11px 0 11px 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-900);
  border-bottom: 1px solid var(--line-500);
}

.page-contact .pc-dir__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .pc-dir__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 8px;
  height: 1px;
  background: var(--pc-dir-accent);
}

/* ---------- 对接流程 ---------- */
.page-contact .pc-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-step {
  --pc-step-accent: var(--signal-500);
  position: relative;
  padding: 0 0 34px 46px;
  margin-left: 11px;
  border-left: 1px solid var(--line-500);
}

.page-contact .pc-step:nth-child(2) { --pc-step-accent: var(--cyan-400); }
.page-contact .pc-step:nth-child(3) { --pc-step-accent: var(--mint-400); }

.page-contact .pc-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .pc-step__num {
  position: absolute;
  left: -12px;
  top: -2px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  margin: 0;
  border-radius: 50%;
  border: 1px solid var(--pc-step-accent);
  background: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--pc-step-accent);
}

.page-contact .pc-step__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-900);
}

.page-contact .pc-step__body {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-300);
}

.page-contact .pc-step__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-contact .pc-steps__figure {
  margin: 44px 0 0;
  border: 1px solid var(--line-500);
  border-radius: var(--pc-card-r);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-850), var(--ink-950));
}

.page-contact .pc-steps__figure img {
  width: 100%;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

/* ---------- 资料清单 ---------- */
.page-contact .pc-lists {
  row-gap: 20px;
}

.page-contact .pc-list {
  --pc-list-accent: var(--signal-500);
  padding: 24px 22px 20px;
  border: 1px solid var(--line-500);
  border-radius: var(--pc-card-r);
  background: var(--ink-850);
}

.page-contact .pc-list--cyan { --pc-list-accent: var(--cyan-400); }
.page-contact .pc-list--mint { --pc-list-accent: var(--mint-400); }

.page-contact .pc-list__title {
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-500);
  font-size: 16.5px;
  font-weight: 500;
  color: var(--text-900);
}

.page-contact .pc-list__items {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-list__items li {
  position: relative;
  padding: 9px 0 9px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-300);
}

.page-contact .pc-list__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 7px;
  height: 1px;
  background: var(--pc-list-accent);
}

/* ---------- 响应节奏 ---------- */
.page-contact .pc-sla {
  row-gap: 18px;
}

.page-contact .pc-sla__item {
  padding: 24px 22px;
  border: 1px solid var(--line-500);
  border-radius: var(--pc-card-r);
  background: linear-gradient(180deg, var(--ink-850), var(--ink-950));
}

.page-contact .pc-sla__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.6vw, 1.85rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-contact .pc-sla__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-300);
}

.page-contact .pc-sla__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-900);
}

/* ---------- 联系方式 ---------- */
.page-contact .pc-contact {
  padding: 36px 22px 34px;
  border-radius: var(--pc-card-r);
}

.page-contact .pc-contact__title {
  font-size: clamp(1.6rem, 5vw, 2.15rem);
  margin: 6px 0 12px;
  color: var(--ink-950);
}

.page-contact .pc-contact__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-750);
}

.page-contact .pc-contact__list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--paper-200);
  border: 1px solid var(--paper-200);
  border-radius: var(--radius-soft);
  overflow: hidden;
}

.page-contact .pc-contact__item {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  background: var(--paper-50);
}

.page-contact .pc-contact__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-750);
}

.page-contact .pc-contact__value {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink-950);
  word-break: break-word;
}

.page-contact .pc-contact__value--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-contact .pc-copy {
  justify-self: start;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-500);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-850);
  cursor: pointer;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-contact .pc-copy:hover {
  background: var(--signal-500);
  border-color: var(--signal-500);
  color: var(--paper-50);
}

.page-contact .pc-contact__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--signal-500);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-750);
}

/* ---------- 常见问题 ---------- */
.page-contact .pc-faqs {
  border-top: 1px solid var(--line-500);
}

.page-contact .pc-faq {
  border-bottom: 1px solid var(--line-500);
}

.page-contact .pc-faq__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 44px 20px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--text-900);
  transition: color 200ms var(--ease);
}

.page-contact .pc-faq__q::-webkit-details-marker { display: none; }
.page-contact .pc-faq__q::marker { content: ""; }

.page-contact .pc-faq__q:hover { color: var(--ember-400); }

.page-contact .pc-faq__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-contact .pc-faq__q::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 11px;
  height: 1px;
  background: var(--signal-500);
}

.page-contact .pc-faq__q::before {
  content: "";
  position: absolute;
  right: 11px;
  top: 50%;
  width: 1px;
  height: 11px;
  margin-top: -5px;
  background: var(--signal-500);
  transition: opacity 200ms var(--ease);
}

.page-contact .pc-faq[open] .pc-faq__q::before { opacity: 0; }

.page-contact .pc-faq__a {
  padding: 0 44px 22px 34px;
}

.page-contact .pc-faq__a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text-300);
}

/* ---------- 收束 ---------- */
.page-contact .pc-outro {
  margin-top: 8px;
  padding: 48px 0 64px;
  border-top: 1px solid var(--line-500);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center top;
}

.page-contact .pc-outro__sign {
  margin: 0 0 18px;
  font-family: var(--font-narrow);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--text-300);
}

.page-contact .pc-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.page-contact .pc-outro__links a {
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line-500);
  font-size: 15px;
  color: var(--text-900);
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .pc-outro__links a:hover {
  color: var(--signal-500);
  border-color: var(--signal-500);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-contact {
    padding: 40px 34px 38px;
  }

  .page-contact .pc-contact__item {
    grid-template-columns: 108px minmax(0, 1fr) auto;
    align-items: center;
    gap: 20px;
    padding: 20px 22px;
  }

  .page-contact .pc-copy {
    justify-self: end;
  }
}

@media (min-width: 960px) {
  .page-contact .pc-hero {
    padding: 40px 0 84px;
  }

  .page-contact .pc-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 56px;
  }

  .page-contact .pc-block {
    padding: 88px 0;
  }

  .page-contact .pc-head {
    margin-bottom: 52px;
  }

  .page-contact .pc-dirs {
    row-gap: 24px;
  }

  .page-contact .pc-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 36px;
  }

  .page-contact .pc-step,
  .page-contact .pc-step:last-child {
    padding: 54px 0 0 0;
    margin-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-500);
  }

  .page-contact .pc-step__num {
    left: 0;
    top: -13px;
  }

  .page-contact .pc-step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -22px;
    top: -4px;
    width: 11px;
    height: 11px;
    border-top: 1px solid var(--line-500);
    border-right: 1px solid var(--line-500);
    transform: rotate(45deg);
  }

  .page-contact .pc-steps__figure {
    margin-top: 64px;
  }

  .page-contact .pc-lists {
    row-gap: 24px;
  }

  .page-contact .pc-sla {
    row-gap: 24px;
  }

  .page-contact .pc-outro {
    padding: 64px 0 84px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-dir,
  .page-contact .pc-chip,
  .page-contact .pc-copy,
  .page-contact .pc-faq__q,
  .page-contact .pc-faq__q::before,
  .page-contact .pc-outro__links a {
    transition-duration: 120ms;
  }

  .page-contact .pc-dir:hover {
    transform: none;
  }
}