.page-contact {
  --pc-hero-glow: rgba(79, 227, 193, .10);
  --pc-orange-glow: rgba(255, 122, 47, .08);
  --pc-step-size: 60px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: var(--s6) 0 var(--s5);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--pc-hero-glow) 0%, transparent 68%);
  pointer-events: none;
}

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

.page-contact .hero-grid {
  margin-top: var(--s4);
  row-gap: var(--s4);
}

.page-contact .contact-hero h1 {
  margin: var(--s2) 0 var(--s3);
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  max-width: 18ch;
}

.page-contact .contact-hero .type-lead {
  max-width: 56ch;
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .hero-side {
  align-self: start;
}

.page-contact .hero-figures {
  padding: var(--s3);
}

.page-contact .figure-list {
  margin: var(--s2) 0 var(--s3);
  display: grid;
  gap: var(--s2);
}

.page-contact .figure-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s2);
  padding-bottom: var(--s1);
  border-bottom: 1px solid var(--line);
}

.page-contact .figure-row dt {
  font-size: .875rem;
  color: var(--ink-mute);
  line-height: 1.5;
}

.page-contact .figure-row dd {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 1.75rem;
  letter-spacing: .02em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-contact .figure-unit {
  margin-left: 4px;
  font-family: var(--f-sans);
  font-size: .75rem;
  color: var(--ink-mute);
}

/* ---------- 章节头 ---------- */
.page-contact .section-head {
  max-width: 62ch;
  margin-bottom: var(--s5);
}

.page-contact .section-head h2 {
  margin: var(--s1) 0 var(--s2);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-contact .section-intro {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact #directions,
.page-contact #process,
.page-contact #linkup,
.page-contact #contact-info,
.page-contact #feedback {
  scroll-margin-top: calc(var(--header-h) + var(--strip-h) + var(--s3));
}

/* ---------- 合作方向：标签切换 ---------- */
.page-contact .direction-tabs {
  display: block;
}

.page-contact .direction-rail {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s2);
  margin-bottom: var(--s4);
}

.page-contact .direction-tab {
  display: grid;
  gap: 6px;
  text-align: left;
  padding: var(--s3);
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color .24s ease, background-color .24s ease, transform .24s ease;
}

.page-contact .direction-tab:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

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

.page-contact .direction-tab[aria-selected="true"] {
  background: var(--glass);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px rgba(79, 227, 193, .3);
}

.page-contact .direction-code {
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .direction-name {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
}

.page-contact .direction-for {
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--ink-mute);
  opacity: .7;
  transition: opacity .24s ease, color .24s ease;
}

.page-contact .direction-tab:hover .direction-for,
.page-contact .direction-tab[aria-selected="true"] .direction-for {
  opacity: 1;
  color: var(--cyan);
}

.page-contact .direction-panel {
  padding: var(--s3);
  background: var(--pitch-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.page-contact .direction-panel[hidden] {
  display: none;
}

.page-contact .direction-title {
  margin: 0 0 var(--s3);
  padding-bottom: var(--s2);
  border-bottom: 1px solid var(--line);
  font-size: 1.25rem;
  line-height: 1.3;
}

.page-contact .direction-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s3);
}

.page-contact .direction-block .label {
  margin: 0 0 var(--s1);
}

.page-contact .direction-block p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .dot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--s1);
}

.page-contact .dot-list li {
  position: relative;
  padding-left: 18px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .dot-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 四步流程 ---------- */
.page-contact .step-track {
  list-style: none;
  margin: 0 0 var(--s4);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s3);
}

.page-contact .step-item {
  position: relative;
}

.page-contact .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--pc-step-size);
  height: var(--pc-step-size);
  margin-bottom: var(--s2);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--pitch-900);
  color: var(--cyan);
  font-size: 20px;
  letter-spacing: .02em;
  transition: border-color .24s ease, color .24s ease, box-shadow .24s ease;
}

.page-contact .step-title {
  margin: 0 0 var(--s1);
  font-size: 1.25rem;
  line-height: 1.3;
  transition: color .24s ease;
}

.page-contact .step-text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .step-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--panel);
}

.page-contact .step-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-contact .process-foot {
  margin: var(--s3) 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .process-foot a,
.page-contact .linkup-hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 193, .4);
}

.page-contact .process-foot a:hover,
.page-contact .linkup-hint a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 对接方式 ---------- */
.page-contact .linkup-grid {
  row-gap: var(--s4);
}

.page-contact .linkup-intro h2 {
  margin: var(--s1) 0 var(--s2);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-contact .linkup-intro p {
  margin: 0 0 var(--s2);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .linkup-hint {
  padding-top: var(--s2);
  border-top: 1px solid var(--line);
}

.page-contact .linkup-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .linkup-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: var(--s3) 0;
  border-top: 1px solid var(--line);
}

.page-contact .linkup-row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .linkup-row dt {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .linkup-row dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

/* ---------- 联系信息 ---------- */
.page-contact .contact-layout {
  row-gap: var(--s4);
}

.page-contact .contact-card {
  padding: var(--s3);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.page-contact .contact-lines {
  list-style: none;
  margin: var(--s2) 0 0;
  padding: 0;
  display: grid;
  gap: var(--s2);
}

.page-contact .contact-lines li {
  display: grid;
  gap: 4px;
}

.page-contact .contact-key {
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--ink-mute);
}

.page-contact .contact-value {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .contact-value.mono {
  font-size: 1.125rem;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-contact .contact-note {
  margin: var(--s3) 0 0;
  padding-top: var(--s2);
  border-top: 1px solid var(--line);
  font-size: .875rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .contact-icp {
  margin: var(--s2) 0 0;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--ink-mute);
}

.page-contact .contact-body h2 {
  margin: 0 0 var(--s2);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-contact .contact-lead {
  margin: 0 0 var(--s3);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .prep-list {
  list-style: none;
  margin: 0 0 var(--s4);
  padding: 0;
  display: grid;
  gap: var(--s1);
}

.page-contact .prep-list li {
  position: relative;
  padding-left: 22px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 1px;
  background: var(--orange);
}

.page-contact .contact-visual {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--panel);
}

.page-contact .contact-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 用户反馈 ---------- */
.page-contact .feedback-grid {
  row-gap: var(--s4);
}

.page-contact .feedback-intro h2 {
  margin: var(--s1) 0 var(--s2);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-contact .feedback-intro .type-lead {
  margin: 0 0 var(--s3);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .feedback-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--s2);
}

.page-contact .feedback-list li {
  padding: var(--s3);
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--r-sm);
}

.page-contact .feedback-code {
  display: block;
  margin-bottom: 6px;
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-contact .feedback-list h3 {
  margin: 0 0 var(--s1);
  font-size: 1.25rem;
  line-height: 1.3;
}

.page-contact .feedback-list p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-contact .direction-rail {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .direction-panel {
    padding: var(--s4);
  }

  .page-contact .contact-card {
    padding: var(--s4);
  }

  .page-contact .linkup-row {
    grid-template-columns: 132px 1fr;
    gap: var(--s3);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: var(--s7) 0 var(--s6);
  }

  .page-contact .direction-grid {
    grid-template-columns: 1.1fr 1.7fr 1fr;
    gap: var(--s4);
  }

  .page-contact .step-track {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--s3);
    margin-bottom: var(--s5);
  }

  .page-contact .step-item {
    padding-top: calc(var(--pc-step-size) + var(--s3));
  }

  .page-contact .step-item::after {
    content: "";
    position: absolute;
    top: calc(var(--pc-step-size) / 2);
    left: calc(var(--pc-step-size) + var(--s1));
    right: calc(-1 * var(--s3));
    height: 1px;
    background: var(--line);
  }

  .page-contact .step-item:last-child::after {
    display: none;
  }

  .page-contact .step-num {
    position: absolute;
    top: 0;
    left: 0;
    margin-bottom: 0;
  }

  .page-contact .step-item:last-child .step-num {
    border-color: var(--orange);
    color: var(--orange);
  }

  .page-contact .step-item:hover .step-num {
    border-color: var(--cyan);
    box-shadow: 0 0 0 6px rgba(79, 227, 193, .08);
  }

  .page-contact .step-item:hover .step-title {
    color: var(--cyan);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--header-h) + var(--strip-h) + var(--s3));
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .direction-tab,
  .page-contact .step-num,
  .page-contact .step-title,
  .page-contact .direction-for {
    transition: none;
  }

  .page-contact .direction-tab:hover {
    transform: none;
  }
}