.page-contact {
  --pc-gap: clamp(18px, 3vw, 34px);
  --pc-field: #0E1726;
}

/* ---- hero ---- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.5vw, 52px) 0 clamp(22px, 3.6vw, 40px);
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -160px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(63, 224, 208, 0.13), transparent 68%);
  pointer-events: none;
}

.page-contact .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-contact .crumb__link {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms ease, border-color 140ms ease;
}

.page-contact .crumb__link:hover,
.page-contact .crumb__link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

.page-contact .crumb-current {
  color: var(--cyan);
}

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

.page-contact .contact-hero__lead .h1 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 54px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__lead .lead {
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-contact .quick-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .quick-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .quick-facts__k {
  flex: 0 0 68px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--violet);
}

.page-contact .quick-facts__v {
  flex: 1 1 180px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---- desk ---- */
.page-contact .contact-desk {
  padding: clamp(30px, 5vw, 58px) 0 0;
}

.page-contact .contact-desk__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

/* form panel */
.page-contact .form-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .form-panel__flow {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  pointer-events: none;
}

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

.page-contact .form-panel__head .h2 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .form-panel__no {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .form-panel__head .muted {
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

.page-contact .field {
  display: block;
  margin-bottom: 18px;
}

.page-contact .field__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--violet);
}

.page-contact .field__input,
.page-contact .field__area {
  display: block;
  width: 100%;
  max-width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--pc-field);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.page-contact .field__area {
  resize: vertical;
  min-height: 116px;
}

.page-contact .field__input::placeholder,
.page-contact .field__area::placeholder {
  color: rgba(154, 163, 174, 0.65);
}

.page-contact .field__input:focus,
.page-contact .field__area:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px var(--line-cyan);
}

/* topic chips */
.page-contact .topic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.page-contact .topic-chip {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--stone);
  font-size: 13px;
  cursor: pointer;
  user-select: none;
  transition: border-color 140ms ease, color 140ms ease, background-color 140ms ease;
}

.page-contact .topic-chip:hover {
  border-color: var(--violet);
  color: var(--paper);
}

.page-contact .topic-input:checked + .topic-chip {
  border-color: var(--cyan);
  background: rgba(63, 224, 208, 0.1);
  color: var(--cyan);
}

.page-contact .topic-input:focus-visible + .topic-chip {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .topic-hint {
  display: none;
  margin: 0 0 22px;
  padding-left: 11px;
  border-left: 2px solid var(--line-cyan);
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

.page-contact .topic-hint[data-topic="版本咨询"] {
  display: block;
}

.page-contact .form-panel:has(.topic-input:checked) .topic-hint {
  display: none;
}

.page-contact .form-panel:has(#topic-version:checked) .topic-hint[data-topic="版本咨询"],
.page-contact .form-panel:has(#topic-usage:checked) .topic-hint[data-topic="使用问题"],
.page-contact .form-panel:has(#topic-file:checked) .topic-hint[data-topic="资料索取"],
.page-contact .form-panel:has(#topic-coop:checked) .topic-hint[data-topic="合作洽谈"] {
  display: block;
}

/* submit */
.page-contact .submit-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}

.page-contact .submit-btn {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.page-contact .submit-check:checked ~ .submit-btn {
  opacity: 0.5;
  pointer-events: none;
}

.page-contact .submit-state {
  visibility: hidden;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

.page-contact .submit-check:checked ~ .submit-state {
  visibility: visible;
}

.page-contact .submit-note {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--stone);
}

/* form media */
.page-contact .form-media {
  margin-top: var(--pc-gap);
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}

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

.page-contact .form-media .media__cap {
  padding: 12px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---- side column ---- */
.page-contact .contact-desk__side {
  display: grid;
  gap: var(--pc-gap);
  border-top: 1px solid var(--line-soft);
  padding-top: var(--pc-gap);
  transition: border-color 180ms ease;
}

.page-contact .contact-desk:has(.field__input:focus, .field__area:focus, .topic-input:focus) .contact-desk__side {
  border-top-color: var(--line-cyan);
}

.page-contact .status-strip {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(63, 224, 208, 0.05);
}

.page-contact .status-strip__label {
  display: block;
  margin-bottom: 12px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-contact .status-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .status-chip {
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-contact .status-chip--a {
  border-color: var(--line-cyan);
  background: rgba(63, 224, 208, 0.06);
  color: var(--cyan);
}

.page-contact .status-chip--b {
  border-color: rgba(31, 143, 133, 0.7);
  background: rgba(31, 143, 133, 0.18);
  color: var(--cyan-soft);
}

.page-contact .status-chip--c {
  border-color: rgba(31, 143, 133, 0.5);
  background: rgba(31, 143, 133, 0.32);
  color: var(--paper);
}

.page-contact .channel-card,
.page-contact .address-block {
  position: relative;
  padding: 18px 16px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .channel-card--mail {
  border-left: 2px solid var(--line-warm);
}

.page-contact .channel-card__idx {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--violet);
}

.page-contact .h3 {
  margin: 0 0 8px;
  padding-right: 28px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--paper);
}

.page-contact .channel-card p,
.page-contact .address-block p {
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--stone);
}

.page-contact .channel-card__val {
  margin: 0 !important;
  padding: 9px 11px;
  border: 1px dashed var(--line);
  background: var(--ink);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__note {
  margin: 10px 0 0 !important;
  font-size: 12px;
  color: var(--violet) !important;
}

.page-contact .address-block__line {
  padding: 11px 12px;
  border: 1px solid var(--line);
  background: var(--ink);
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .address-block__note {
  margin-top: 12px !important;
}

/* ---- slash band ---- */
.page-contact .slash-band {
  margin: clamp(36px, 6vw, 68px) 0;
  padding: clamp(18px, 2.6vw, 26px) 0;
  background: linear-gradient(96deg, var(--orange) 0%, #E8712A 58%, var(--clay) 100%);
  transform: skewY(-1.3deg);
}

.page-contact .slash-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  transform: skewY(1.3deg);
}

.page-contact .slash-band__idx {
  flex: 0 0 auto;
  padding: 5px 10px;
  border: 1px solid rgba(11, 18, 32, 0.45);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-contact .slash-band__text {
  flex: 1 1 260px;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.6vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.005em;
  color: var(--ink);
}

/* ---- cooperation ---- */
.page-contact .coop .section-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .coop .h2,
.page-contact .status-flow .h2,
.page-contact .next-steps .h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 38px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.12;
  color: var(--paper);
}

.page-contact .section-head__note {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

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

.page-contact .coop-card {
  position: relative;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--teal);
  background: var(--ink-2);
  transition: border-color 160ms ease, transform 160ms ease;
}

.page-contact .coop-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.page-contact .coop-card__no {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .coop-card p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--stone);
}

.page-contact .coop-card__fit {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px !important;
  letter-spacing: 0.03em;
  color: var(--violet) !important;
  margin-bottom: 0 !important;
}

/* ---- status flow ---- */
.page-contact .status-flow__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-contact .status-flow__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .status-flow__chip {
  justify-self: start;
  padding: 5px 10px;
  border: 1px solid var(--line-cyan);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-contact .status-flow__chip--a {
  color: var(--cyan);
  background: rgba(63, 224, 208, 0.06);
}

.page-contact .status-flow__chip--b {
  color: var(--cyan-soft);
  background: rgba(31, 143, 133, 0.18);
  border-color: rgba(31, 143, 133, 0.7);
}

.page-contact .status-flow__chip--c {
  color: var(--paper);
  background: rgba(31, 143, 133, 0.32);
  border-color: rgba(31, 143, 133, 0.5);
}

.page-contact .status-flow__body .h3 {
  padding-right: 0;
  margin-bottom: 6px;
}

.page-contact .status-flow__body p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--stone);
}

/* ---- next steps ---- */
.page-contact .next-steps {
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-contact .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line-soft);
}

.page-contact .next-link {
  display: flex;
  align-items: baseline;
  gap: 8px 16px;
  padding: 15px 2px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  transition: border-color 150ms ease, padding-left 150ms ease;
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-bottom-color: var(--line-cyan);
  padding-left: 8px;
}

.page-contact .next-link__k {
  flex: 0 0 120px;
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--cyan);
}

.page-contact .next-link__t {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  color: var(--paper);
}

/* ---- responsive ---- */
@media (min-width: 700px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .status-flow__item {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-contact .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--pc-gap);
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: end;
  }

  .page-contact .contact-desk__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .contact-desk__side {
    border-top: none;
    border-left: 1px solid var(--line-soft);
    padding-top: 0;
    padding-left: var(--pc-gap);
    align-content: start;
  }

  .page-contact .contact-desk:has(.field__input:focus, .field__area:focus, .topic-input:focus) .contact-desk__side {
    border-left-color: var(--line-cyan);
    border-top-color: transparent;
  }
}

@media (min-width: 1180px) {
  .page-contact .next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .next-link {
    flex-direction: column;
    gap: 6px;
    padding: 18px 14px 18px 0;
    border-bottom: none;
    border-right: 1px solid var(--line-soft);
  }

  .page-contact .next-link:last-child {
    border-right: none;
  }

  .page-contact .next-link__k {
    flex: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-card,
  .page-contact .next-link,
  .page-contact .topic-chip,
  .page-contact .field__input,
  .page-contact .field__area {
    transition: none;
  }

  .page-contact .coop-card:hover {
    transform: none;
  }
}