.page-contact {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.page-contact .breadcrumb a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .crumb-sep {
  margin: 0 0.5em;
  color: var(--rock);
}

.page-contact .eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--loess);
}

.page-contact .eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 2px;
  background: var(--loess);
}

.page-contact .eyebrow--light {
  color: var(--sand);
}

.page-contact .eyebrow--light::before {
  background: var(--sand);
}

/* ---------- 01 联系入口 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(1.2rem, 3vw, 2rem);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 2.6rem);
  padding-bottom: clamp(1.6rem, 4vw, 2.4rem);
  border-bottom: 1px solid var(--line);
  background-image: linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 25% 100%;
  background-position: 0 0;
}

.page-contact h1 {
  margin: 0.2rem 0 1rem;
  font-size: clamp(2rem, 7.4vw, 3.5rem);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.015em;
  max-width: 17ch;
}

.page-contact .contact-lead {
  max-width: 46ch;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-contact .contact-lines {
  margin: 1.7rem 0 0;
  display: grid;
  gap: 1.05rem;
}

.page-contact .contact-line {
  display: grid;
  gap: 0.2rem;
  padding-left: 0.95rem;
  border-left: 2px solid var(--sand);
}

.page-contact .contact-line:first-child {
  border-left-color: var(--goji);
}

.page-contact .contact-line--sm {
  border-left-color: var(--lake);
}

.page-contact .contact-line dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-contact .contact-line dd {
  margin: 0;
}

.page-contact .contact-big {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 6.4vw, 2rem);
  letter-spacing: 0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .contact-big--mail {
  font-size: clamp(0.95rem, 4.2vw, 1.3rem);
  color: var(--deep);
}

.page-contact .contact-addr {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--rock);
}

.page-contact .contact-hours {
  margin: 1.5rem 0 0;
  padding: 0.85rem 1rem;
  background: var(--sand);
  border-left: 3px solid var(--loess);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .contact-hours .u-mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--deep);
}

.page-contact .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-contact .jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 1.6rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.page-contact .jump a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-contact .jump a:hover,
.page-contact .jump a:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
}

.page-contact .contact-hero__figure {
  margin: 0;
}

.page-contact .contact-hero__figure .media-frame {
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--rock);
}

/* ---------- 02 咨询准备 ---------- */
.page-contact .prep {
  padding-block: clamp(2.2rem, 5vw, 3.4rem);
}

.page-contact .prep__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 2.6rem);
}

.page-contact .prep__figure .media-frame {
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .prep__body h2,
.page-contact .process__head h2,
.page-contact .routing__head h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.45rem, 4.4vw, 2.1rem);
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-contact .prep-list {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0.2rem 0.7rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .prep-item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .prep-item__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--loess);
  padding-top: 0.2rem;
}

.page-contact .prep-item h3 {
  margin: 0 0 0.28rem;
  font-size: 1rem;
  font-weight: 800;
}

.page-contact .prep-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--rock);
}

.page-contact .note {
  margin-top: 1.2rem;
  font-size: 0.93rem;
  line-height: 1.8;
}

/* ---------- 03 服务流程 ---------- */
.page-contact .process {
  padding-block: clamp(2rem, 5vw, 3.2rem);
  border-top: 1px solid var(--line);
}

.page-contact .process__desc {
  margin: 0;
  max-width: 56ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--rock);
}

.page-contact .steps {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-contact .step {
  padding: 0.95rem 0 1rem;
  border-top: 2px solid var(--sand);
}

.page-contact .step:nth-child(3n + 1) {
  border-top-color: var(--loess);
}

.page-contact .step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--goji);
}

.page-contact .step h3 {
  margin: 0.3rem 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 800;
}

.page-contact .step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 04 协作对接 ---------- */
.page-contact .collab {
  padding-block: clamp(2rem, 5vw, 3.2rem);
}

.page-contact .collab__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.3rem, 3.5vw, 2.2rem);
  padding: clamp(1.3rem, 4vw, 2.6rem);
  background: var(--deep);
  color: var(--white);
}

.page-contact .collab__intro h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.4rem, 4.2vw, 2rem);
  line-height: 1.28;
  font-weight: 900;
  color: var(--white);
}

.page-contact .collab__intro p {
  margin: 0 0 0.8rem;
  max-width: 42ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(251, 248, 240, 0.84);
}

.page-contact .collab__link a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--sand);
  text-decoration: none;
  border-bottom: 1px solid rgba(231, 215, 191, 0.5);
  padding-bottom: 2px;
}

.page-contact .collab__link a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.page-contact .collab-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
}

.page-contact .collab-card {
  padding: 1rem 1.05rem 1.15rem;
  border: 1px solid rgba(251, 248, 240, 0.24);
  background: rgba(251, 248, 240, 0.04);
}

.page-contact .collab-card h3 {
  margin: 0.6rem 0 0.4rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--white);
}

.page-contact .collab-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(251, 248, 240, 0.78);
}

/* ---------- 05 常见问题 ---------- */
.page-contact .routing {
  padding-block: clamp(2rem, 5vw, 3.2rem);
  border-top: 1px solid var(--line);
}

.page-contact .split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  margin-top: 1.3rem;
}

.page-contact .flow-item {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 0.15rem 1rem 0.9rem;
  transition: border-color var(--dur) ease;
}

.page-contact .flow-item:hover {
  border-color: var(--line-strong);
}

.page-contact .flow-item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0 0.85rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.5;
}

.page-contact .flow-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--goji);
  line-height: 1;
}

.page-contact .flow-item[open] summary::after {
  content: "−";
  color: var(--signal);
}

.page-contact .flow-item p {
  margin: 0 0 0.7rem;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--rock);
}

.page-contact .flow-item a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
}

.page-contact .flow-item a:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.page-contact .closing {
  margin: 1.6rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--rock);
}

.page-contact section[id] {
  scroll-margin-top: 1.5rem;
}

@media (min-width: 720px) {
  .page-contact .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1.2rem, 3vw, 2rem);
  }

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

  .page-contact .collab-list .collab-card:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-contact .prep__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .collab__panel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .collab-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .collab-list .collab-card:first-child {
    grid-column: auto;
  }

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

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