.page-contact {
  --contact-grid-color: rgba(149, 165, 166, 0.12);
  --contact-card-bg: rgba(44, 62, 80, 0.5);
  --contact-form-bg: rgba(26, 37, 47, 0.85);
  --contact-border-glow: rgba(230, 126, 34, 0.25);
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
}

/* ===== 面包屑 ===== */
.contact-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(26, 37, 47, 0.6);
  border-bottom: 1px solid var(--contact-grid-color);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}
.contact-breadcrumb__link {
  color: var(--color-silver);
  text-decoration: none;
  transition: color var(--transition);
}
.contact-breadcrumb__link:hover,
.contact-breadcrumb__link:focus-visible {
  color: var(--color-orange);
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
  border-radius: 2px;
}
.contact-breadcrumb__sep {
  color: var(--color-silver);
  opacity: 0.5;
  user-select: none;
}
.contact-breadcrumb__current {
  color: var(--color-orange);
  font-weight: 600;
}

/* ===== 分屏区 ===== */
.contact-hero {
  display: flex;
  flex-direction: column;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: 0;
  box-sizing: border-box;
}

/* ---- 左侧地图 ---- */
.contact-map {
  position: relative;
  background: linear-gradient(145deg, #1A252F 0%, #0F1A22 100%);
  border-bottom: 1px solid var(--contact-grid-color);
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  box-sizing: border-box;
}
.contact-map__svg {
  width: 100%;
  height: auto;
  max-height: 400px;
  display: block;
  border-radius: var(--radius-sm);
}
.contact-map__label {
  position: absolute;
  bottom: 0.75rem;
  left: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-silver);
  opacity: 0.5;
  letter-spacing: 0.05em;
  background: rgba(26, 37, 47, 0.7);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* ---- 右侧联系信息 ---- */
.contact-info {
  padding: 2rem 1.25rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: linear-gradient(160deg, rgba(44,62,80,0.3) 0%, rgba(26,37,47,0.6) 100%);
  position: relative;
}
.contact-info__title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.contact-info__title::before {
  content: "// ";
  color: var(--color-orange);
  font-family: var(--font-mono);
  font-weight: 400;
}
.contact-info__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.6;
  max-width: 34em;
}
.contact-info__graphic {
  display: block;
  width: 120px;
  height: auto;
  max-width: 200px;
  border-radius: var(--radius);
  opacity: 0.75;
  margin: 0.5rem 0 0.25rem;
  border: 1px solid var(--contact-grid-color);
  object-fit: cover;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 0.25rem 0 0;
}
.contact-details__item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.75rem 1rem;
  background: var(--contact-card-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-orange);
  transition: background var(--transition), border-color var(--transition);
}
.contact-details__item:hover,
.contact-details__item:focus-within {
  background: rgba(44, 62, 80, 0.75);
  border-left-color: var(--cta-highlight);
}
.contact-details__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-silver);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}
.contact-details__value {
  margin: 0;
  font-size: 1rem;
  color: var(--text-primary);
  word-break: break-all;
}
.contact-details__link {
  color: var(--color-orange);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition), box-shadow var(--transition);
  border-radius: 2px;
}
.contact-details__link:hover,
.contact-details__link:focus-visible {
  color: var(--cta-highlight);
  box-shadow: 0 2px 0 var(--color-orange);
  outline: none;
}
.contact-details__link:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
  box-shadow: none;
}
.contact-info__note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(230, 126, 34, 0.08);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(230, 126, 34, 0.15);
  margin: 0.25rem 0 0;
  line-height: 1.5;
}
.contact-info__trust {
  font-size: 0.8rem;
  color: var(--color-silver);
  font-family: var(--font-mono);
  padding: 0.6rem 1rem;
  background: rgba(26, 37, 47, 0.5);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--contact-grid-color);
  line-height: 1.5;
  margin-top: 0.25rem;
}

/* ===== 留言表单区 ===== */
.contact-form-section {
  background: linear-gradient(180deg, rgba(26,37,47,0.9) 0%, #1A252F 100%);
  border-top: 1px solid var(--contact-grid-color);
  border-bottom: 1px solid var(--contact-grid-color);
  padding: 2.5rem 1.25rem;
}
.contact-form-section__inner {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.contact-form-section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.contact-form-section__title::before {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.7em;
  color: var(--color-orange);
  background: rgba(230, 126, 34, 0.12);
  padding: 0.15em 0.5em;
  border-radius: var(--radius-sm);
  line-height: 1.4;
}
.contact-form-section__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: -0.5rem 0 0.25rem;
  line-height: 1.6;
}

/* ---- 表单 ---- */
.contact-form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.contact-form__field {
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.contact-form__field--full {
  flex-basis: 100%;
}
.contact-form__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-silver);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}
.contact-form__input,
.contact-form__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(26, 37, 47, 0.7);
  border: 1px solid rgba(149, 165, 166, 0.25);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  box-sizing: border-box;
}
.contact-form__input::placeholder,
.contact-form__textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}
.contact-form__input:focus,
.contact-form__textarea:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px var(--contact-border-glow);
  background: rgba(26, 37, 47, 0.9);
}
.contact-form__input:hover,
.contact-form__textarea:hover {
  border-color: rgba(230, 126, 34, 0.4);
}
.contact-form__textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}
.contact-form__action {
  flex: 1 1 100%;
  display: flex;
  justify-content: flex-end;
  padding-top: 0.5rem;
}
.contact-form__btn {
  background: var(--color-orange);
  color: var(--text-primary);
  border: none;
  padding: 0.75rem 2.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), transform 0.2s ease, box-shadow var(--transition);
  box-shadow: 0 2px 8px rgba(230, 126, 34, 0.25);
}
.contact-form__btn:hover,
.contact-form__btn:focus-visible {
  background: var(--cta-highlight);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(230, 126, 34, 0.35);
  outline: none;
}
.contact-form__btn:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}
.contact-form__btn:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(230, 126, 34, 0.2);
}

/* ===== 支持链接区 ===== */
.contact-support {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #0F1A22;
}
.contact-support__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  user-select: none;
  pointer-events: none;
}
.contact-support__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.contact-support__title {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
}
.contact-support__title::before {
  content: "? ";
  color: var(--color-orange);
  font-family: var(--font-mono);
}
.contact-support__text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}
.contact-support__btn {
  background: transparent;
  color: var(--color-orange);
  border: 2px solid var(--color-orange);
  padding: 0.65rem 2.2rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.2s ease;
  display: inline-block;
}
.contact-support__btn:hover,
.contact-support__btn:focus-visible {
  background: var(--color-orange);
  color: var(--text-primary);
  transform: translateY(-2px);
  outline: none;
}
.contact-support__btn:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* ============================================= */
/* 桌面端 ≥768px                                  */
/* ============================================= */
@media (min-width: 768px) {
  .contact-breadcrumb {
    padding: 1rem 2rem;
  }

  .contact-hero {
    flex-direction: row;
    min-height: 520px;
  }
  .contact-map {
    flex: 1 1 50%;
    border-bottom: none;
    border-right: 1px solid var(--contact-grid-color);
    min-height: 520px;
    padding: 2rem;
  }
  .contact-map__svg {
    max-height: 460px;
  }
  .contact-map__label {
    bottom: 1rem;
    left: 1.5rem;
  }

  .contact-info {
    flex: 1 1 50%;
    padding: 2.5rem 2.5rem 3rem;
    gap: 1.25rem;
    background: linear-gradient(135deg, rgba(44,62,80,0.25) 0%, rgba(26,37,47,0.5) 100%);
  }
  .contact-info__graphic {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 100px;
    opacity: 0.2;
    margin: 0;
    pointer-events: none;
  }
  .contact-details {
    gap: 0.85rem;
  }
  .contact-details__item {
    padding: 0.85rem 1.25rem;
  }
  .contact-info__trust {
    margin-top: 0.5rem;
  }

  .contact-form-section {
    padding: 3.5rem 2rem;
  }
  .contact-form__field {
    flex: 1 1 calc(50% - 0.5rem);
  }
  .contact-form__field--full {
    flex-basis: 100%;
  }
  .contact-form__action {
    padding-top: 0.75rem;
  }

  .contact-support {
    min-height: 340px;
  }
  .contact-support__bg {
    opacity: 0.2;
  }
  .contact-support__content {
    padding: 4rem 2rem;
    gap: 1.25rem;
  }
}

/* ============================================= */
/* 桌面端 ≥1024px                                */
/* ============================================= */
@media (min-width: 1024px) {
  .contact-breadcrumb {
    padding: 1.25rem 2.5rem;
  }

  .contact-hero {
    min-height: 580px;
  }
  .contact-map {
    min-height: 580px;
    padding: 2.5rem;
  }
  .contact-info {
    padding: 3rem 3rem 3.5rem;
  }
  .contact-info__graphic {
    width: 120px;
    opacity: 0.25;
    bottom: 2rem;
    right: 2rem;
  }

  .contact-form-section {
    padding: 4rem 2rem;
  }
  .contact-form-section__inner {
    gap: 1.5rem;
  }

  .contact-support {
    min-height: 380px;
  }
}