.page-contact {
  --contact-edge: 2px solid var(--violet-700);
  --contact-row: 40px;
  color-scheme: dark;
}

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

.page-contact .breadcrumb {
  margin: 20px 0 0;
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--white-050);
  margin: 12px 0 0;
}

.page-contact h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 4vw, 2.1rem);
  line-height: 1.2;
  color: var(--white-050);
  margin: 10px 0 0;
}

.page-contact .eyebrow {
  color: var(--gold-400);
  letter-spacing: 0.14em;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: 26px 0 8px;
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 26px;
}

.page-contact .contact-hero__lead {
  color: var(--mist-200);
  font-size: 1rem;
  line-height: 1.75;
  margin: 16px 0 0;
}

.page-contact .contact-hero__hint {
  color: var(--cyan-200);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--cyan-400);
}

.page-contact .contact-hero__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--gold-400);
  margin: 14px 0 0;
}

.page-contact .contact-hero__media {
  margin: 0;
  align-self: start;
}

.page-contact .contact-hero__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 通道与流程 ---------- */
.page-contact .lanes__grid {
  display: grid;
  gap: var(--contact-row);
}

.page-contact .lanes__main,
.page-contact .lanes__side,
.page-contact .lanes__wide {
  min-width: 0;
}

.page-contact .lanes__stack {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.page-contact .lane {
  background: var(--ink-800);
  border: var(--contact-edge);
  box-shadow: var(--shadow-1);
  padding: 20px;
  transition: transform var(--fast) ease-out, box-shadow var(--fast) ease-out,
    background var(--fast) ease-out;
}

.page-contact .lane:hover,
.page-contact .lane:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-2);
  background: var(--ink-900);
}

.page-contact .lane__title {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white-050);
  margin: 0 0 8px;
}

.page-contact .lane__value {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  letter-spacing: 0.05em;
  color: var(--cyan-200);
  word-break: break-word;
  margin: 0 0 10px;
}

.page-contact .lane__desc {
  color: var(--mist-200);
  font-size: 0.92rem;
  line-height: 1.72;
  margin: 0 0 16px;
}

.page-contact .lane__copy,
.page-contact .mailroom__copy {
  min-height: 44px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  background: transparent;
  color: var(--cyan-200);
  border: 2px solid var(--violet-600);
  cursor: pointer;
  transition: background var(--fast) ease-out, color var(--fast) ease-out,
    transform var(--fast) ease-out;
}

.page-contact .lane__copy:hover,
.page-contact .mailroom__copy:hover {
  background: var(--violet-600);
  color: var(--white-050);
  transform: translate(-2px, -2px);
}

.page-contact .lane__copy:focus-visible,
.page-contact .mailroom__copy:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .process {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  border: var(--contact-edge);
  padding: 24px 20px 28px;
  margin-top: 24px;
}

.page-contact .process__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  z-index: 0;
}

.page-contact .process__inner {
  position: relative;
  z-index: 1;
}

.page-contact .flow {
  position: relative;
  margin-top: 22px;
  padding-bottom: 26px;
}

.page-contact .flow__list {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.page-contact .flow__step {
  background: rgba(16, 19, 53, 0.86);
  border: 2px solid var(--violet-700);
  border-left: 4px solid var(--cyan-400);
  padding: 14px 16px;
  transition: background var(--base) ease-out, transform var(--fast) ease-out;
}

.page-contact .flow__step:hover {
  background: rgba(25, 29, 74, 0.95);
  transform: translateY(-2px);
}

.page-contact .flow__step:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .flow__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--gold-400);
}

.page-contact .flow__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white-050);
  margin: 4px 0 0;
}

.page-contact .flow__brief {
  color: var(--mist-200);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 6px 0 0;
}

.page-contact .flow__detail {
  color: var(--cyan-200);
  font-size: 0.84rem;
  line-height: 1.6;
  margin: 0;
  max-height: none;
  opacity: 1;
  transition: max-height var(--base) ease-out, opacity 120ms linear,
    margin var(--base) ease-out;
}

.page-contact .flow__rail {
  display: none;
}

/* ---------- 合作方向 ---------- */
.page-contact .lanes__wide {
  margin-top: 8px;
}

.page-contact .partners__list {
  list-style: none;
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
}

.page-contact .partner {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px 14px;
  padding: 20px 0;
  border-top: 1px solid var(--hairline);
}

.page-contact .partner:last-child {
  border-bottom: 1px solid var(--hairline);
}

.page-contact .partner__num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--gold-400);
  padding-top: 2px;
}

.page-contact .partner__body {
  min-width: 0;
}

.page-contact .partner__title {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--white-050);
  margin: 0 0 6px;
}

.page-contact .partner__desc {
  color: var(--mist-200);
  font-size: 0.92rem;
  line-height: 1.72;
  margin: 0;
}

.page-contact .partner__link {
  display: inline-block;
  min-height: 44px;
  padding: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--cyan-200);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--fast) ease-out, color var(--fast) ease-out;
}

.page-contact .partner__link:hover {
  color: var(--white-050);
  border-bottom-color: var(--cyan-400);
}

.page-contact .partner__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

/* ---------- 使用建议 ---------- */
.page-contact .advice__grid {
  display: grid;
  gap: 26px;
}

.page-contact .advice__intro {
  color: var(--mist-200);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 14px 0 0;
}

.page-contact .advice__ref {
  font-size: 0.88rem;
  color: var(--mist-200);
  margin: 10px 0 0;
}

.page-contact .advice__ref a,
.page-contact .advice__note a,
.page-contact .mailroom__ref a {
  color: var(--cyan-200);
  text-decoration: underline;
  text-decoration-color: var(--violet-600);
  text-underline-offset: 3px;
}

.page-contact .advice__ref a:focus-visible,
.page-contact .advice__note a:focus-visible,
.page-contact .mailroom__ref a:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .advice__cols {
  display: grid;
  gap: 20px;
}

.page-contact .advice__col {
  background: var(--ink-900);
  border: var(--contact-edge);
  padding: 18px 20px;
}

.page-contact .advice__col-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan-200);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.page-contact .advice__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .advice__list li {
  position: relative;
  padding-left: 18px;
  color: var(--mist-200);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-contact .advice__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--violet-600);
  border: 1px solid var(--cyan-400);
}

.page-contact .advice__note {
  margin: 22px 0 0;
  padding: 16px 18px;
  background: var(--ink-800);
  border-left: 4px solid var(--gold-400);
  color: var(--mist-200);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ---------- 函件地址 ---------- */
.page-contact .mailroom__grid {
  display: grid;
  gap: 26px;
}

.page-contact .mailroom__block {
  background: linear-gradient(160deg, var(--ink-900) 0%, var(--ink-800) 78%, var(--violet-700) 100%);
  border: var(--contact-edge);
  box-shadow: var(--shadow-1);
  padding: 22px 20px;
}

.page-contact .mailroom__addr {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.8;
  letter-spacing: 0.05em;
  color: var(--cyan-200);
  margin: 16px 0 18px;
  word-break: break-word;
}

.page-contact .mailroom__notes p {
  color: var(--mist-200);
  font-size: 0.94rem;
  line-height: 1.78;
  margin: 0 0 14px;
}

.page-contact .mailroom__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .mailroom__list li {
  position: relative;
  padding-left: 18px;
  color: var(--mist-200);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-contact .mailroom__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--violet-600);
  border: 1px solid var(--cyan-400);
}

.page-contact .mailroom__ref {
  font-size: 0.88rem;
  margin: 0;
}

/* ---------- 合作前准备 ---------- */
.page-contact .prep__intro {
  color: var(--mist-200);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 14px 0 0;
  max-width: 62ch;
}

.page-contact .prep__list {
  list-style: none;
  counter-reset: none;
  display: grid;
  gap: 20px;
  margin: 26px 0 0;
  padding: 0;
}

.page-contact .prep__item {
  background: var(--ink-900);
  border: var(--contact-edge);
  border-top: 4px solid var(--violet-600);
  padding: 20px;
  transition: transform var(--fast) ease-out, box-shadow var(--fast) ease-out,
    border-top-color var(--fast) ease-out;
}

.page-contact .prep__item:hover {
  transform: translateY(-2px);
  border-top-color: var(--cyan-400);
  box-shadow: var(--shadow-1);
}

.page-contact .prep__num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--gold-400);
}

.page-contact .prep__title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--white-050);
  margin: 6px 0 8px;
}

.page-contact .prep__desc {
  color: var(--mist-200);
  font-size: 0.9rem;
  line-height: 1.72;
  margin: 0;
}

/* ---------- 底部信息条 ---------- */
.page-contact .contact-strip {
  border-top: 2px solid var(--violet-700);
  border-bottom: 2px solid var(--violet-700);
  background: var(--ink-900);
  margin-top: 16px;
}

.page-contact .contact-strip__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--mist-200);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .advice__cols {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: 40px 0 12px;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: center;
  }

  .page-contact .lanes__grid {
    grid-template-columns: 5fr 7fr;
    gap: 28px 40px;
  }

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

  .page-contact .partners__list {
    grid-template-columns: 1fr 1fr;
    column-gap: 48px;
  }

  .page-contact .advice__grid {
    grid-template-columns: 4fr 8fr;
    gap: 40px;
  }

  .page-contact .mailroom__grid {
    grid-template-columns: 5fr 7fr;
    gap: 40px;
    align-items: start;
  }

  .page-contact .prep__list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .flow__list {
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .page-contact .flow {
    padding-bottom: 30px;
  }

  .page-contact .flow__rail {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 22px;
  }

  .page-contact .flow__rail line {
    stroke: var(--hairline);
    stroke-width: 2;
    stroke-dasharray: 6 6;
  }

  .page-contact .flow__rail rect {
    fill: var(--violet-600);
  }

  .page-contact .flow__rail polygon {
    fill: var(--cyan-400);
  }

  .page-contact .flow__step {
    padding: 16px;
  }

  .page-contact .flow__detail {
    max-height: 0;
    opacity: 0;
  }

  .page-contact .flow__step:hover .flow__detail,
  .page-contact .flow__step:focus-visible .flow__detail,
  .page-contact .flow__step:focus-within .flow__detail {
    max-height: 7rem;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .lane,
  .page-contact .lane__copy,
  .page-contact .mailroom__copy,
  .page-contact .flow__step,
  .page-contact .flow__detail,
  .page-contact .prep__item,
  .page-contact .partner__link {
    transition: none;
  }

  .page-contact .lane:hover,
  .page-contact .lane:focus-within,
  .page-contact .lane__copy:hover,
  .page-contact .mailroom__copy:hover,
  .page-contact .flow__step:hover,
  .page-contact .prep__item:hover {
    transform: none;
  }
}