.page-contact {
  --contact-gap: clamp(1.75rem, 4vw, 2.75rem);
  padding-bottom: 0;
}

.page-contact .contact-shell {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(1.25rem, 3.5vw, 2rem);
  border-bottom: 1px solid var(--line-steel);
}

.page-contact .breadcrumbs {
  margin-bottom: 1.25rem;
  font-size: 0.78rem;
  color: var(--mist-300);
}

.page-contact .breadcrumbs a {
  color: var(--mist-300);
  text-decoration: none;
  border-bottom: 1px solid var(--line-steel);
}

.page-contact .breadcrumbs a:hover,
.page-contact .breadcrumbs a:focus-visible {
  color: var(--pulse-cyan);
  border-bottom-color: var(--pulse-cyan);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 1rem;
}

.page-contact .contact-hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: clamp(1.7rem, 5.2vw, 2.6rem);
  line-height: 1.16;
  color: var(--text-white);
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 40rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--mist-300);
}

/* ---------- 主体双栏 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: var(--contact-gap);
  padding-block: var(--contact-gap);
}

.page-contact .channel-col {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-contact .section__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--pulse-cyan);
}

.page-contact .channel-visual {
  margin: 0;
  border: 1px solid var(--line-steel);
  background: var(--ink-900);
  padding: 0.75rem;
}

.page-contact .channel-visual img {
  width: 100%;
  object-fit: cover;
  filter: saturate(0.25) contrast(1.05);
}

.page-contact .channel-visual .media-frame__caption {
  margin-top: 0.6rem;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--mist-300);
}

.page-contact .channel-card {
  border: 1px solid var(--line-steel);
  border-left: 2px solid var(--pulse-cyan);
  background: var(--ink-800);
  padding: 1rem 1.05rem 1.1rem;
  transition: border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-contact .channel-card--amber {
  border-left-color: var(--signal-amber);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--pulse-cyan);
  border-left-color: var(--pulse-cyan);
  background: var(--ink-900);
}

.page-contact .channel-card--amber:hover,
.page-contact .channel-card--amber:focus-within {
  border-left-color: var(--signal-amber);
}

.page-contact .channel-card__title {
  margin: 0 0 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-white);
}

.page-contact .channel-card__value {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  color: var(--pulse-cyan);
  word-break: break-all;
}

.page-contact .channel-card--amber .channel-card__value {
  color: var(--signal-amber);
}

.page-contact .channel-card__note {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-contact .disclosure {
  border-top: 1px solid var(--line-steel);
  padding-top: 0.6rem;
}

.page-contact .disclosure__summary {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--paper-050);
  list-style: none;
}

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

.page-contact .disclosure__summary::before {
  content: "＋ ";
  color: var(--pulse-cyan);
  font-family: var(--font-mono);
}

.page-contact .disclosure[open] .disclosure__summary::before {
  content: "－ ";
}

.page-contact .disclosure__summary:focus-visible {
  outline: 2px solid var(--pulse-cyan);
  outline-offset: 3px;
}

.page-contact .disclosure__body p {
  margin: 0.6rem 0 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--mist-300);
}

/* ---------- 时效刻度 ---------- */
.page-contact .timeline {
  border: 1px solid var(--line-steel);
  background: var(--ink-900);
  padding: 1rem 1.05rem 1.15rem;
}

.page-contact .timeline__title {
  margin: 0 0 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mist-300);
}

.page-contact .timeline__scale {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  border-top: 1px solid var(--line-steel);
  padding-top: 0.95rem;
}

.page-contact .timeline__point {
  position: relative;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.2rem;
}

.page-contact .timeline__point::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42rem;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--line-steel);
}

.page-contact .timeline__point--now::before {
  background: var(--pulse-cyan);
}

.page-contact .timeline__time {
  font-size: 0.78rem;
  color: var(--text-white);
}

.page-contact .timeline__label {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist-300);
}

.page-contact .timeline__note {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--mist-300);
}

/* ---------- 填写区 ---------- */
.page-contact .field-col h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.015em;
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  color: var(--text-white);
}

.page-contact .field-col__lead {
  margin: 0 0 1.5rem;
  max-width: 42rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-contact .field-list {
  display: grid;
  gap: 0.9rem;
}

.page-contact .field {
  border: 1px solid var(--line-steel);
  background: var(--ink-900);
  padding: 0.85rem 0.95rem 0.9rem;
  transition: border-color var(--dur) ease;
}

.page-contact .field:focus-within {
  border-color: var(--pulse-cyan);
}

.page-contact .field__label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--paper-050);
}

.page-contact .field__input {
  width: 100%;
  box-sizing: border-box;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-steel);
  color: var(--text-white);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  line-height: 1.6;
  padding: 0.3rem 0 0.4rem;
}

.page-contact .field__input::placeholder {
  color: var(--line-steel);
}

.page-contact .field__input:focus-visible {
  outline: 2px solid var(--pulse-cyan);
  outline-offset: 3px;
  border-bottom-color: var(--pulse-cyan);
}

.page-contact .field__input--area {
  min-height: 5.5rem;
  resize: vertical;
  border-bottom: 1px solid var(--line-steel);
}

.page-contact .field__hints {
  margin: 0.55rem 0 0;
  font-size: 0.76rem;
  line-height: 1.6;
}

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

.page-contact .field__hint--empty {
  color: var(--mist-300);
}

.page-contact .field__hint--error {
  display: none;
  color: var(--signal-amber);
}

.page-contact .field__input:not(:placeholder-shown) ~ .field__hints .field__hint--empty {
  display: none;
}

.page-contact .field__input:not(:placeholder-shown):invalid ~ .field__hints .field__hint--error {
  display: block;
}

.page-contact .field-col__foot {
  margin: 1.4rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--signal-amber);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--mist-300);
}

/* ---------- 流程 ---------- */
.page-contact .contact-flow {
  border-top: 1px solid var(--line-steel);
  background: var(--ink-900);
  padding-block: var(--contact-gap);
}

.page-contact .contact-flow h2 {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  color: var(--text-white);
}

.page-contact .flow-visual {
  margin: 0 0 1.5rem;
  border: 1px solid var(--line-steel);
  background: var(--ink-800);
  padding: 0.75rem;
}

.page-contact .flow-visual img {
  width: 100%;
  object-fit: cover;
}

.page-contact .flow-visual .media-frame__caption {
  margin-top: 0.6rem;
  font-size: 0.75rem;
  color: var(--mist-300);
}

.page-contact .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-contact .flow-step {
  border-top: 2px solid var(--pulse-cyan);
  padding-top: 0.85rem;
}

.page-contact .flow-step__num {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--pulse-cyan);
  margin-bottom: 0.4rem;
}

.page-contact .flow-step__title {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-white);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--mist-300);
}

/* ---------- 合作 ---------- */
.page-contact .contact-partner {
  border-top: 1px solid var(--line-steel);
  padding-block: var(--contact-gap);
}

.page-contact .contact-partner h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  color: var(--text-white);
}

.page-contact .section__lead {
  margin: 0 0 1.5rem;
  max-width: 42rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-300);
}

.page-contact .partner-grid {
  display: grid;
  gap: 1rem;
}

.page-contact .partner-card {
  border: 1px solid var(--line-steel);
  background: var(--ink-800);
  padding: 1rem 1.05rem 1.1rem;
  display: grid;
  gap: 0.6rem;
  align-content: start;
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-contact .partner-card:hover,
.page-contact .partner-card:focus-within {
  border-color: var(--pulse-cyan);
  transform: translateY(-2px);
}

.page-contact .partner-card__title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-white);
}

.page-contact .partner-card__text {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.78;
  color: var(--mist-300);
}

.page-contact .partner-card__meta {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--signal-amber);
}

/* ---------- 底部通栏 ---------- */
.page-contact .contact-foot {
  border-top: 1px solid var(--line-steel);
  background: var(--paper-050);
  padding-block: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-contact .contact-foot__grid {
  display: grid;
  gap: 1.5rem;
}

.page-contact .contact-foot__block h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--ink-800);
}

.page-contact .contact-foot__addr {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink-950);
}

.page-contact .contact-foot__note {
  margin: 0;
  max-width: 34rem;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--side-slate);
}

.page-contact .contact-foot__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-contact .contact-foot__links a {
  color: var(--ink-900);
  font-size: 0.86rem;
  text-decoration: none;
  border-bottom: 1px solid var(--line-steel);
  padding-bottom: 0.15rem;
}

.page-contact .contact-foot__links a:hover,
.page-contact .contact-foot__links a:focus-visible {
  color: var(--ink-950);
  border-bottom-color: var(--signal-amber);
}

.page-contact .contact-foot__links a:focus-visible {
  outline: 2px solid var(--pulse-cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 30rem) {
  .page-contact .timeline__scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
  }
}

@media (min-width: 48rem) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: end;
    gap: 2rem;
  }

  .page-contact .field-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }

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

  .page-contact .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-contact .contact-foot__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 2.5rem;
  }
}

@media (min-width: 64rem) {
  .page-contact .contact-body {
    grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .partner-card,
  .page-contact .field {
    transition: none;
  }

  .page-contact .partner-card:hover,
  .page-contact .partner-card:focus-within {
    transform: none;
  }
}