.page-contact {
  --page-pad: 1.25rem;
  --page-pad-lg: 2rem;
  --contact-stripe: rgba(57, 255, 20, 0.05);
  --contact-stripe-strong: rgba(57, 255, 20, 0.1);
  background:
    linear-gradient(rgba(35, 53, 84, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 53, 84, 0.22) 1px, transparent 1px),
    var(--bg-deep);
  background-size: 3rem 3rem, 3rem 3rem, auto;
  color: var(--text-light);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: 5rem;
}

.page-contact h2 {
  font-family: var(--font-display);
  color: var(--text-light);
  line-height: 1.2;
  scroll-margin-top: 6rem;
}

.page-contact h3 {
  font-family: var(--font-body);
  color: var(--text-light);
}

/* ===== Hero 框景 ===== */
.contact-hero {
  margin: 0 auto;
  max-width: var(--container-width);
  padding: 2.5rem var(--page-pad) 0;
  width: 100%;
}

.contact-hero__frame {
  position: relative;
  background: linear-gradient(180deg, rgba(17, 34, 64, 0.82), rgba(15, 42, 67, 0.74)), var(--bg-surface);
  border: 1px solid var(--border-line);
  box-shadow: var(--shadow-float);
  padding: 1.5rem 1.25rem;
}

.contact-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0.5rem;
  border: 1px dashed rgba(57, 255, 20, 0.3);
  pointer-events: none;
  z-index: 2;
}

.contact-hero__frame::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 6.5rem;
  height: 0.25rem;
  background: linear-gradient(90deg, var(--accent-green), rgba(57, 255, 20, 0.12));
}

.contact-hero__rail {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding-bottom: 1rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--border-line);
}

.contact-hero__rail-num {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-green);
}

.contact-hero__rail-line {
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--border-line) 0 0.5rem, transparent 0.5rem 0.875rem);
}

.contact-hero__rail-text,
.contact-hero__rail-status {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.contact-hero__rail-status {
  color: var(--accent-green);
  border: 1px solid rgba(57, 255, 20, 0.45);
  padding: 0.125rem 0.5rem;
}

.contact-hero__layout {
  position: relative;
  z-index: 3;
  display: grid;
  gap: 2rem;
}

.contact-hero__visual {
  margin: 0;
  border: 1px solid var(--border-line);
  background: var(--bg-mid);
}

.contact-hero__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05);
}

.contact-hero__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  padding: 0.625rem 0.875rem;
  border-top: 1px solid var(--border-line);
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.contact-hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.contact-crumbs {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.contact-crumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-crumbs a:hover,
.contact-crumbs a:focus-visible {
  color: var(--accent-green);
  text-decoration: underline;
  outline: none;
}

.contact-crumbs__sep {
  color: var(--border-line);
}

.contact-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 2rem;
  color: var(--accent-green);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.contact-hero__kicker .data-label {
  color: var(--text-secondary);
}

.contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
  margin-block: 1rem 1.25rem;
  max-width: 17ch;
}

.contact-hero__lead {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 48ch;
  margin-bottom: 1.75rem;
}

.contact-hero__facts {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem 1.25rem;
}

.contact-hero__facts li {
  position: relative;
  padding-left: 1.125rem;
  color: var(--text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

.contact-hero__facts li::before {
  content: "▶";
  position: absolute;
  left: 0;
  top: 0.35em;
  color: var(--accent-green);
  font-size: 0.625rem;
}

.contact-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
}

.contact-toc a {
  border: 1px solid var(--border-line);
  background: rgba(10, 25, 47, 0.45);
  padding: 0.3125rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.contact-toc a:hover,
.contact-toc a:focus-visible {
  color: var(--accent-green);
  border-color: var(--accent-green);
  outline: none;
}

.contact-hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent-green);
  background: rgba(57, 255, 20, 0.07);
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-hero__cta:hover,
.contact-hero__cta:focus-visible {
  background: var(--accent-green);
  color: var(--bg-deep);
  outline: none;
  box-shadow: 0 0 0 0.25rem rgba(57, 255, 20, 0.16);
}

/* ===== 联系渠道与表单 ===== */
.contact-split {
  margin: 0 auto;
  max-width: var(--container-width);
  padding: 4rem var(--page-pad) 0;
  width: 100%;
  display: grid;
  gap: 0;
}

.contact-split__left {
  position: relative;
  background:
    repeating-linear-gradient(135deg, var(--contact-stripe) 0 0.25rem, transparent 0.25rem 1rem),
    linear-gradient(180deg, var(--bg-surface), var(--bg-mid));
  border: 1px solid var(--border-line);
  padding: 1.5rem 1.25rem;
}

.contact-split__left::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 0;
  height: 0;
  border-left: 3rem solid transparent;
  border-top: 3rem solid var(--accent-green);
  opacity: 0.9;
  z-index: 2;
}

.contact-form-panel__head {
  margin-bottom: 1.5rem;
}

.contact-form-panel__head h2 {
  font-size: 1.75rem;
  margin: 0.75rem 0;
}

.contact-form-panel__head p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 0;
}

.contact-form-panel__head a {
  color: var(--accent-green);
  word-break: break-all;
}

.contact-form {
  display: grid;
  gap: 1.25rem;
}

.contact-form__row {
  display: grid;
  gap: 1.25rem;
}

.contact-form__field {
  display: grid;
  gap: 0.5rem;
}

.contact-form__field label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.contact-form__field input,
.contact-form__field textarea,
.contact-form__field select {
  width: 100%;
  border-radius: 0;
  border: 1px solid var(--border-line);
  background-color: rgba(10, 25, 47, 0.72);
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  padding: 0.8125rem 0.875rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form__field input::placeholder,
.contact-form__field textarea::placeholder {
  color: rgba(136, 146, 176, 0.6);
}

.contact-form__field input:hover,
.contact-form__field textarea:hover,
.contact-form__field select:hover {
  border-color: rgba(11, 197, 234, 0.55);
}

.contact-form__field input:focus,
.contact-form__field textarea:focus,
.contact-form__field select:focus {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
  border-color: var(--accent-green);
  box-shadow: 0 0 0 0.25rem rgba(57, 255, 20, 0.1);
}

.contact-form__field select {
  -webkit-appearance: none;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--accent-green) 50%),
    linear-gradient(135deg, var(--accent-green) 50%, transparent 50%);
  background-position:
    calc(100% - 1.125rem) 1.125rem,
    calc(100% - 0.875rem) 1.125rem;
  background-size: 0.375rem 0.375rem, 0.375rem 0.375rem;
  background-repeat: no-repeat;
  padding-right: 2.5rem;
}

.contact-form__field select option {
  color: var(--text-light);
  background: var(--bg-mid);
}

.contact-form__field textarea {
  resize: vertical;
  min-height: 8.5rem;
}

.contact-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  align-items: center;
}

.contact-form__submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent-orange);
  background: var(--accent-orange);
  color: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.8125rem 1.5rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form__submit:hover,
.contact-form__submit:focus-visible {
  background: transparent;
  color: var(--accent-orange);
  outline: none;
  box-shadow: 0 0 0 0.25rem rgba(255, 107, 53, 0.16);
}

.contact-form__note {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.contact-split__right {
  position: relative;
  background: linear-gradient(180deg, var(--bg-mid), var(--bg-deep));
  border: 1px solid var(--border-line);
  border-top: 0.25rem solid var(--accent-orange);
  padding: 1.5rem 1.25rem;
}

.contact-split__right::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: -1px;
  width: 0;
  height: 0;
  border-right: 2.25rem solid transparent;
  border-bottom: 2.25rem solid var(--accent-green);
}

.contact-info-card {
  background: rgba(15, 42, 67, 0.5);
  border: 1px solid rgba(35, 53, 84, 0.8);
  padding: 1.25rem 1.125rem;
}

.contact-info-card__title {
  font-size: 1.4375rem;
  margin: 0.75rem 0 1rem;
}

.contact-info-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0;
}

.contact-info-list__item {
  display: flex;
  gap: 0.875rem;
  align-items: flex-start;
  padding: 1rem 0;
  border-top: 1px solid rgba(35, 53, 84, 0.7);
}

.contact-info-list__item:first-child {
  border-top: 0;
}

.contact-info-list__icon {
  flex: 0 0 1.5rem;
  height: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-green);
}

.contact-info-list__content {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}

.contact-info-list__label {
  font-family: var(--font-mono);
  font-size: 0.71875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.contact-info-list__value {
  color: var(--text-light);
  font-size: 0.9375rem;
  line-height: 1.6;
  text-decoration: none;
  word-break: break-all;
  transition: color var(--transition-fast);
}

a.contact-info-list__value:hover,
a.contact-info-list__value:focus-visible {
  color: var(--accent-green);
  outline: none;
}

.contact-info-card__action {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-info-card__copy {
  align-self: flex-start;
  border: 1px solid var(--accent-green);
  background: transparent;
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: 0.625rem 1rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.contact-info-card__copy:hover,
.contact-info-card__copy:focus-visible {
  background: var(--accent-green);
  color: var(--bg-deep);
  outline: none;
}

.contact-info-card__copy:active {
  background: var(--accent-orange);
  border-color: var(--accent-orange);
}

.contact-info-card__hint {
  color: var(--text-secondary);
  font-size: 0.75rem;
  line-height: 1.5;
}

.contact-info-visual {
  margin: 1rem 0 0;
  border: 1px solid var(--border-line);
  background: var(--bg-surface);
}

.contact-info-visual__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05);
}

.contact-info-visual__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-line);
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* ===== 回复时效 ===== */
.contact-response {
  margin: 4rem auto 0;
  max-width: var(--container-width);
  padding: 3rem var(--page-pad);
  background:
    repeating-linear-gradient(135deg, var(--contact-stripe) 0 0.125rem, transparent 0.125rem 0.75rem),
    linear-gradient(100deg, var(--bg-mid), var(--bg-deep));
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
  display: grid;
  gap: 2rem;
}

.contact-response__intro {
  border-left: 0.25rem solid var(--accent-green);
  padding-left: 1.25rem;
  align-self: start;
}

.contact-response__intro h2 {
  font-size: 2rem;
  margin: 0.75rem 0 1rem;
}

.contact-response__intro p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

.contact-response__fact {
  border-top: 1px dashed rgba(35, 53, 84, 0.9);
  padding-top: 0.875rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.8;
}

.contact-response__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.875rem;
}

.contact-response__step {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-line);
  padding: 1.25rem;
}

.contact-response__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1;
  color: var(--accent-green);
  margin-bottom: 0.75rem;
}

.contact-response__step h3 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  margin-block: 0 0.625rem;
}

.contact-response__step p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== 常见联系场景 ===== */
.contact-scenarios {
  margin: 0 auto;
  max-width: var(--container-width);
  padding: 4rem var(--page-pad) 0;
}

.contact-scenarios__head {
  margin-bottom: 2rem;
}

.contact-scenarios__head h2 {
  font-size: 2rem;
  margin: 0.75rem 0 0.5rem;
}

.contact-scenarios__head p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 0;
}

.contact-scenarios__grid {
  display: grid;
  gap: 1.25rem;
}

.contact-scenario {
  position: relative;
  background: linear-gradient(135deg, var(--bg-surface), var(--bg-mid));
  border: 1px solid var(--border-line);
  padding: 1.5rem;
  transition: border-color var(--transition-fast);
}

.contact-scenario::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 2.5rem;
  height: 0.125rem;
  background: var(--accent-green);
}

.contact-scenario:hover {
  border-color: rgba(57, 255, 20, 0.45);
}

.contact-scenario__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--bg-deep);
  background: var(--accent-green);
  padding: 0.25rem 0.5rem;
  margin-bottom: 0.875rem;
}

.contact-scenario h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  line-height: 1.4;
  margin-block: 0 0.75rem;
}

.contact-scenario p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.contact-scenario__link {
  display: inline-flex;
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 255, 20, 0.35);
  padding-bottom: 0.125rem;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.contact-scenario__link:hover,
.contact-scenario__link:focus-visible {
  color: var(--accent-orange);
  border-bottom-color: var(--accent-orange);
  outline: none;
}

/* ===== 联系地址 ===== */
.contact-location {
  margin: 0 auto;
  max-width: var(--container-width);
  padding: 4rem var(--page-pad) 0;
  display: grid;
  gap: 2.5rem;
}

.contact-location__text h2 {
  font-size: 2rem;
  margin: 0.75rem 0 1rem;
}

.contact-location__text p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.75;
  margin-bottom: 0;
}

.contact-location__address {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-light);
  border-left: 0.25rem solid var(--accent-orange);
  padding-left: 1rem;
  margin: 1rem 0 1.25rem;
}

.contact-location__map {
  border: 1px solid var(--border-line);
  background: var(--bg-surface);
}

.contact-location__grid svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 桌面端布局 ===== */
@media (min-width: 42rem) {
  .page-contact {
    --page-pad: 2rem;
    --page-pad-lg: 3rem;
  }

  .contact-hero__frame {
    padding: 2rem;
  }

  .contact-hero__layout {
    grid-template-columns: 5fr 7fr;
    gap: 2.5rem;
    align-items: center;
  }

  .contact-hero__visual {
    order: -1;
  }

  .contact-hero h1 {
    max-width: 18ch;
  }

  .contact-split {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .contact-split__left,
  .contact-split__right {
    padding: 2rem;
  }

  .contact-split__right {
    margin-left: 0.5rem;
    border-top: 1px solid var(--border-line);
    border-left: 0;
  }

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

  .contact-response {
    grid-template-columns: 0.9fr 1.1fr;
    padding: 4rem var(--page-pad);
  }

  .contact-response__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .contact-response__step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -0.875rem;
    top: 2rem;
    width: 0.8125rem;
    height: 1px;
    background: var(--accent-green);
    z-index: 1;
  }

  .contact-scenarios__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .contact-location {
    grid-template-columns: 0.8fr 1.2fr;
    gap: 3.5rem;
    align-items: center;
    padding-bottom: 2rem;
  }
}

@media (min-width: 64rem) {
  .contact-split {
    gap: 0.75rem;
  }

  .contact-split__right {
    margin-left: 0;
  }

  .contact-form-panel__head p {
    max-width: 56ch;
  }
}