.page-contact {
  --pc-border: 2px solid var(--line);
  --pc-accent: var(--cyan);
  --pc-warm: var(--amber);
  color: var(--white);
  font-family: var(--font-body);
}

.page-contact *,
.page-contact *::before,
.page-contact *::after {
  box-sizing: border-box;
}

.page-contact .pc-shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(18px, 4vw, 40px) var(--gutter) clamp(56px, 8vw, 96px);
  display: grid;
  gap: clamp(44px, 6vw, 80px);
}

.page-contact .crumbs {
  margin-bottom: calc(clamp(8px, 2vw, 18px) * -1);
}

/* ---------- Hero ---------- */
.page-contact .pc-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  align-items: end;
}

.page-contact .pc-hero__title {
  font-family: var(--font-display);
  font-size: clamp(36px, 7.6vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 10px 0 0;
  text-wrap: balance;
}

.page-contact .pc-hero__accent {
  color: var(--cyan);
  display: inline-block;
  border-bottom: 4px solid var(--amber);
  padding-bottom: 2px;
}

.page-contact .pc-hero__lede {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.75;
  max-width: 58ch;
}

.page-contact .pc-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-contact .pc-hero__media {
  margin: 0;
  border: var(--pc-border);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--ink-750);
}

.page-contact .pc-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* ---------- Block chrome ---------- */
.page-contact .pc-block__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 24px;
  padding-bottom: 12px;
  margin-bottom: clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--line);
}

.page-contact .pc-block__title {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-contact .pc-block__note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  max-width: 46ch;
  line-height: 1.6;
}

/* ---------- 主题选择 ---------- */
.page-contact .pc-choose {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-contact .pc-topics {
  display: grid;
  gap: 10px;
}

.page-contact .pc-topic {
  position: relative;
  display: block;
  cursor: pointer;
}

.page-contact .pc-topic input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-contact .pc-topic__body {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 3px 12px;
  padding: 13px 15px;
  background: var(--ink-750);
  border: 2px solid var(--line);
  transition: border-color 180ms var(--ease), background 180ms var(--ease), transform 180ms var(--ease);
}

.page-contact .pc-topic__no {
  grid-row: span 2;
  font-size: 12px;
  color: var(--muted);
  padding-top: 4px;
  letter-spacing: 0.06em;
}

.page-contact .pc-topic__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

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

.page-contact .pc-topic:hover .pc-topic__body {
  border-color: var(--white);
}

.page-contact .pc-topic input:checked + .pc-topic__body {
  border-color: var(--cyan);
  background: linear-gradient(180deg, rgba(46, 242, 216, 0.11), rgba(46, 242, 216, 0.02));
  box-shadow: var(--shadow-soft);
  transform: translate(-2px, -2px);
}

.page-contact .pc-topic input:checked + .pc-topic__body .pc-topic__no,
.page-contact .pc-topic input:checked + .pc-topic__body .pc-topic__name {
  color: var(--cyan);
}

.page-contact .pc-topic input:focus-visible + .pc-topic__body {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 表单面板 ---------- */
.page-contact .pc-form {
  display: grid;
  gap: clamp(18px, 2.5vw, 26px);
  padding: clamp(16px, 3vw, 32px);
  background: var(--panel);
  border: var(--pc-border);
  box-shadow: var(--shadow-hard);
}

.page-contact .pc-form__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-800);
}

.page-contact .pc-form__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-contact .pc-fields {
  display: grid;
  gap: 16px;
}

.page-contact .pc-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-contact .pc-field__label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .pc-field__tag {
  color: var(--amber);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-contact .pc-field__input,
.page-contact .pc-field__select,
.page-contact .pc-field__area {
  width: 100%;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--white);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 11px 12px;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-contact .pc-field__area {
  min-height: 92px;
  resize: vertical;
}

.page-contact .pc-field__input::placeholder,
.page-contact .pc-field__area::placeholder {
  color: rgba(154, 170, 184, 0.72);
}

.page-contact .pc-field__input:focus,
.page-contact .pc-field__select:focus,
.page-contact .pc-field__area:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(46, 242, 216, 0.18);
}

.page-contact .pc-field__hint {
  display: none;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--amber);
}

.page-contact .pc-field:focus-within .pc-field__hint {
  display: block;
}

.page-contact .pc-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-contact .pc-form__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .pc-form__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 242, 216, 0.5);
}

.page-contact .pc-form__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 直接联系 ---------- */
.page-contact .pc-direct {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 40px);
  background: var(--ink-750);
  border: var(--pc-border);
}

.page-contact .pc-direct::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(46, 66, 87, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 66, 87, 0.55) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.28;
  pointer-events: none;
}

.page-contact .pc-direct > * {
  position: relative;
  z-index: 1;
}

.page-contact .pc-direct__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-contact .pc-direct__main,
.page-contact .pc-direct__side {
  display: grid;
  gap: 6px;
  align-content: start;
  min-width: 0;
}

.page-contact .pc-direct__label {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .pc-direct__main > .pc-direct__label:first-child,
.page-contact .pc-direct__side > .pc-direct__label:first-child {
  margin-top: 0;
}

.page-contact .pc-direct__mail {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.6vw, 32px);
  line-height: 1.25;
  color: var(--white);
  text-decoration: none;
  border-bottom: 3px solid var(--cyan);
  padding-bottom: 3px;
  overflow-wrap: anywhere;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .pc-direct__mail:hover {
  color: var(--cyan);
  border-bottom-color: var(--amber);
}

.page-contact .pc-direct__phone {
  display: inline-block;
  font-size: clamp(18px, 3vw, 26px);
  color: var(--amber);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.page-contact .pc-direct__phone:hover {
  color: var(--white);
}

.page-contact .pc-direct__value {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--white);
}

.page-contact .pc-direct__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .pc-direct__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-contact .pc-direct__item {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .pc-direct__dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  margin-top: 0.5em;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- 合作方向 ---------- */
.page-contact .pc-partners {
  display: grid;
  gap: 14px;
}

.page-contact .pc-partner {
  display: grid;
  gap: 9px;
  align-content: start;
  padding: 18px;
  background: var(--ink-750);
  border-top: 3px solid var(--cyan);
}

.page-contact .pc-partner:nth-child(2) {
  border-top-color: var(--amber);
}

.page-contact .pc-partner:nth-child(3) {
  border-top-color: var(--mint);
}

.page-contact .pc-partner__no {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .pc-partner__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.01em;
}

.page-contact .pc-partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .pc-partner__fit {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--white);
  border-left: 2px solid var(--line);
  padding-left: 10px;
}

/* ---------- 响应节奏 ---------- */
.page-contact .pc-response {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-contact .pc-response__col {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-contact .pc-response__sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .pc-response__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .pc-response__item {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .pc-response__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .pc-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-fields {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 18px;
  }

  .page-contact .pc-field--wide {
    grid-column: 1 / -1;
  }

  .page-contact .pc-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-contact .pc-hero__media img {
    aspect-ratio: 4 / 3;
  }

  .page-contact .pc-direct__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-contact .pc-response {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-contact .pc-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-contact .pc-choose {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .pc-topics {
    position: sticky;
    top: calc(var(--strip-h) + 20px);
  }

  .page-contact .pc-direct__mail {
    font-size: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-topic__body,
  .page-contact .pc-field__input,
  .page-contact .pc-field__select,
  .page-contact .pc-field__area,
  .page-contact .pc-direct__mail {
    transition: none;
  }

  .page-contact .pc-topic input:checked + .pc-topic__body {
    transform: none;
  }
}