.page-contact {
  --contact-title-size: clamp(2.6rem, 7vw, 4.6rem);
  --contact-gap: 1rem;
  position: relative;
  padding: 1.5rem 0 4rem;
  background-color: var(--c-bg);
  background-image:
    linear-gradient(var(--c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 44px 44px;
}

/* ---------- 面包屑与页头 ---------- */
.page-contact .breadcrumb {
  margin: 0 0 2rem;
  font-size: 0.8125rem;
  color: var(--c-sub);
}

.page-contact .breadcrumb a {
  color: var(--c-text);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-contact .breadcrumb a:hover {
  color: var(--c-green);
  border-color: var(--c-green);
}

.page-contact .contact-head {
  border-bottom: 3px solid var(--c-line);
  margin-bottom: 3.5rem;
}

.page-contact .contact-head__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  padding-bottom: 2.5rem;
}

.page-contact .contact-head__main {
  position: relative;
}

.page-contact .contact-head__rotate {
  display: none;
  position: absolute;
  top: 0.25rem;
  left: auto;
  right: calc(100% + 0.75rem);
  margin: 0;
  writing-mode: vertical-rl;
  font-size: 0.7rem;
  line-height: 1;
  letter-spacing: 0.3em;
  color: var(--c-line);
  white-space: nowrap;
  pointer-events: none;
}

.page-contact .contact-head__index {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  letter-spacing: 0.28em;
  color: var(--c-green);
}

.page-contact .contact-head__title {
  margin: 0;
  font-size: var(--contact-title-size);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-contact .contact-head__title-mark {
  display: inline-block;
  margin-left: 0.12em;
  padding: 0 0.18em;
  color: var(--c-text);
  background: var(--c-panel);
  border: 3px solid var(--c-green);
  box-shadow: var(--shadow-sm);
}

.page-contact .contact-head__lead {
  margin: 0;
  max-width: 36em;
  padding-left: 1rem;
  border-left: 4px solid var(--c-green);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--c-sub);
}

.page-contact .contact-head__sig {
  display: none;
  width: 100%;
  max-width: 140px;
  height: auto;
  justify-self: end;
  align-self: end;
}

/* ---------- 01 联系渠道 ---------- */
.page-contact .contact-channels {
  padding-bottom: 3.5rem;
}

.page-contact .contact-section-head {
  margin-bottom: 2rem;
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .channel-card {
  position: relative;
  padding: 1.5rem;
  background: var(--c-panel);
  border: 3px solid var(--c-line);
  box-shadow: var(--shadow-md);
}

.page-contact .channel-card::before,
.page-contact .channel-card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--c-green);
  border-style: solid;
  pointer-events: none;
  opacity: 0.7;
}

.page-contact .channel-card::before {
  top: -3px;
  left: -3px;
  border-width: 3px 0 0 3px;
}

.page-contact .channel-card::after {
  right: -3px;
  bottom: -3px;
  border-width: 0 3px 3px 0;
}

.page-contact .channel-card--phone {
  border-top: 7px solid var(--c-green);
  background:
    radial-gradient(circle at 92% 0%, rgba(57, 255, 136, 0.14), transparent 44%),
    var(--c-panel);
}

.page-contact .channel-card--mail {
  border-top: 7px solid var(--c-orange);
  background:
    radial-gradient(circle at 92% 0%, rgba(255, 90, 54, 0.14), transparent 44%),
    var(--c-panel);
}

.page-contact .channel-card--addr {
  border-left: 4px solid var(--c-green);
  border-top-color: var(--c-green);
}

.page-contact .channel-card__bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dashed var(--c-line);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-sub);
}

.page-contact .channel-card__label {
  margin: 0 0 0.35rem;
  font-size: 0.8125rem;
  color: var(--c-sub);
}

.page-contact .channel-card__value {
  margin: 0 0 0.9rem;
  font-size: clamp(1.375rem, 3.4vw, 1.9rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--c-text);
  overflow-wrap: anywhere;
}

.page-contact .channel-card--phone .channel-card__value {
  color: var(--c-green);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  letter-spacing: 0.02em;
}

.page-contact .channel-card__value--mail {
  color: var(--c-orange);
  font-size: clamp(1rem, 2.6vw, 1.45rem);
  letter-spacing: 0.02em;
}

.page-contact .channel-card__value--addr {
  font-size: clamp(1.1rem, 2.8vw, 1.5rem);
  letter-spacing: 0.04em;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--c-sub);
}

/* 拨号静态示例 */
.page-contact .dial-demo {
  margin-top: 1.25rem;
  border: 2px solid var(--c-line);
  background: var(--c-bg);
}

.page-contact .dial-demo__trigger {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin: 0;
  padding: 0.8rem 1rem;
  cursor: pointer;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-green);
  user-select: none;
}

.page-contact .dial-demo__trigger::-webkit-details-marker {
  display: none;
}

.page-contact .dial-demo__trigger::after {
  content: "+";
  font-size: 1.2rem;
  line-height: 1;
  color: var(--c-green);
  transition: transform 0.2s ease;
}

.page-contact .dial-demo[open] .dial-demo__trigger::after {
  transform: rotate(45deg);
}

.page-contact .dial-demo__panel {
  padding: 1rem;
  border-top: 2px solid var(--c-line);
}

.page-contact .dial-demo__label {
  margin: 0 0 0.3rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.page-contact .dial-demo__number {
  margin: 0 0 0.7rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-contact .dial-demo__status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.875rem;
  color: var(--c-text);
}

/* 地址卡内部 */
.page-contact .channel-card__addr-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-contact .map-sim {
  position: relative;
  aspect-ratio: 3 / 2;
  border: 2px solid var(--c-line);
  background: var(--c-bg);
  overflow: hidden;
}

.page-contact .map-sim__img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.page-contact .map-sim::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 1;
}

.page-contact .map-sim__pin {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 3px solid var(--c-green);
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 10px rgba(57, 255, 136, 0.18);
  pointer-events: none;
}

.page-contact .map-sim__coord {
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  z-index: 2;
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-green);
  background: rgba(10, 31, 60, 0.85);
  border: 1px solid var(--c-green);
}

.page-contact .channels-note {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin: 1.5rem 0 0;
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--c-sub);
  border: 1px dashed var(--c-line);
  background: rgba(13, 42, 79, 0.55);
}

.page-contact .channels-note__tag {
  flex: 0 0 auto;
  padding: 0 0.5rem;
  font-size: 0.75rem;
  color: var(--c-text);
  background: var(--c-orange);
}

/* ---------- 02 回复承诺 ---------- */
.page-contact .contact-response {
  margin: 0.5rem 0 0;
  padding: 3.5rem 0;
  border-top: 3px solid var(--c-line);
  border-bottom: 3px solid var(--c-line);
  background:
    linear-gradient(118deg, transparent 0%, transparent 58%, rgba(57, 255, 136, 0.08) 58%, rgba(57, 255, 136, 0.08) 62%, transparent 62%, transparent 100%),
    linear-gradient(180deg, rgba(30, 74, 122, 0.28), rgba(10, 31, 60, 0) 50%),
    var(--c-panel);
}

.page-contact .response-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-contact .response-quote {
  margin: 0 0 1.5rem;
  padding: 1.25rem 1.5rem;
  border-left: 6px solid var(--c-green);
  background: var(--c-bg);
  box-shadow: var(--shadow-sm);
}

.page-contact .response-quote p {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--c-text);
}

.page-contact .response-quote__mail {
  overflow-wrap: anywhere;
  color: var(--c-green);
  font-weight: 700;
}

.page-contact .response-quote__hours {
  display: inline-flex;
  margin: 0 0.15em;
  padding: 0.05em 0.4em;
  font-weight: 700;
  color: var(--c-green);
  border: 2px solid var(--c-green);
}

.page-contact .response-copy__note {
  margin: 0 0 1.75rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--c-sub);
}

.page-contact .response-list {
  display: grid;
  gap: 0.75rem;
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
}

.page-contact .response-list__item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border: 2px solid var(--c-line);
  background: var(--c-bg);
  box-shadow: var(--shadow-sm);
}

.page-contact .response-list__item > .mono {
  font-weight: 700;
  color: var(--c-orange);
}

.page-contact .response-list__item strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.9375rem;
  color: var(--c-text);
}

.page-contact .response-list__desc {
  font-size: 0.8125rem;
  line-height: 1.55;
}

.page-contact .response-figure {
  position: relative;
  margin: 0;
  padding: 0.75rem;
  border: 3px solid var(--c-line);
  background: var(--c-bg);
  box-shadow: var(--shadow-md);
}

.page-contact .response-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  border: 2px solid var(--c-line);
}

.page-contact .response-figure::after {
  content: "";
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 14px;
  height: 14px;
  border: 2px solid var(--c-bg);
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 0 6px rgba(57, 255, 136, 0.25);
}

.page-contact .response-figure__cap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--c-line);
  font-size: 0.8125rem;
  color: var(--c-text);
}

/* ---------- 03 合作方向 ---------- */
.page-contact .contact-partners {
  padding-top: 3.5rem;
}

.page-contact .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
}

.page-contact .partner-item {
  position: relative;
  padding: 1.5rem;
  border: 3px solid var(--c-line);
  background: var(--c-panel);
  box-shadow: var(--shadow-md);
}

.page-contact .partner-item--data {
  border-top: 7px solid var(--c-green);
  background-image:
    linear-gradient(var(--c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 30px 30px;
}

.page-contact .partner-item--tech {
  border-top: 7px solid var(--c-orange);
}

.page-contact .partner-item--region {
  border-top: 7px solid var(--c-green);
}

.page-contact .partner-item__num {
  margin: 0 0 0.9rem;
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  color: var(--c-green);
}

.page-contact .partner-item--tech .partner-item__num {
  color: var(--c-orange);
}

.page-contact .partner-item h3 {
  margin: 0 0 0.85rem;
  font-size: 1.375rem;
  font-weight: 900;
  color: var(--c-text);
}

.page-contact .partner-item__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--c-sub);
}

.page-contact .partner-item__facts {
  display: grid;
  gap: 0.55rem;
  margin: 1.25rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--c-line);
  list-style: none;
}

.page-contact .partner-item__facts li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--c-sub);
}

.page-contact .partner-item__facts .mono {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-contact .partner-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 1.75rem;
  padding: 1.5rem;
  border: 3px solid var(--c-orange);
  background: var(--c-bg);
  box-shadow: var(--shadow-md);
}

.page-contact .partner-cta__text {
  max-width: 44em;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--c-text);
}

.page-contact .partner-cta a {
  color: var(--c-orange);
  text-decoration: none;
  border-bottom: 1px solid var(--c-orange);
}

.page-contact .partner-cta a:hover {
  color: var(--c-green);
  border-color: var(--c-green);
}

.page-contact .partner-cta__mono {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--c-sub);
}

/* ---------- 平板 ≥720px ---------- */
@media (min-width: 720px) {
  .page-contact {
    padding-top: 2rem;
  }

  .page-contact .contact-head__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .contact-head__rotate {
    display: block;
  }

  .page-contact .contact-head__sig {
    display: block;
    grid-column: 1 / -1;
    justify-self: end;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .channel-card--addr {
    grid-column: 1 / -1;
  }

  .page-contact .channel-card__addr-inner {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .page-contact .map-sim {
    height: 100%;
    min-height: 260px;
  }

  .page-contact .response-layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .partner-item--data {
    grid-column: 1 / -1;
  }
}

/* ---------- 桌面 ≥1024px ---------- */
@media (min-width: 1024px) {
  .page-contact {
    padding-bottom: 5rem;
  }

  .page-contact .breadcrumb {
    margin-bottom: 2.5rem;
  }

  .page-contact .contact-head__grid {
    grid-template-columns: 4fr 6fr 2fr;
    align-items: end;
    gap: 1.5rem 2rem;
  }

  .page-contact .contact-head__sig {
    grid-column: auto;
    justify-self: end;
    align-self: end;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 1.25rem;
  }

  .page-contact .channel-card--phone {
    grid-column: span 5;
  }

  .page-contact .channel-card--mail {
    grid-column: span 7;
  }

  .page-contact .channel-card--addr {
    grid-column: span 12;
  }

  .page-contact .channel-card__addr-inner {
    grid-template-columns: 5fr 7fr;
  }

  .page-contact .response-layout {
    grid-template-columns: 7fr 5fr;
    gap: 2.5rem;
    align-items: stretch;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 1.25rem;
  }

  .page-contact .partner-item--data {
    grid-column: span 5;
  }

  .page-contact .partner-item--tech {
    grid-column: span 4;
  }

  .page-contact .partner-item--region {
    grid-column: span 3;
  }

  .page-contact .partner-cta {
    padding: 1.75rem 2rem;
  }
}