.page-contact {
  background: var(--pitch-deep);
  color: var(--chalk);
  font-family: var(--ff-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: 84px;
}

.page-contact .yk-breadcrumb {
  padding-top: 22px;
}

.page-contact a {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-contact h2 {
  margin: 0 0 14px;
  font-family: var(--ff-body);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: -0.005em;
}

.page-contact h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-contact .ct-eyebrow {
  margin: 0 0 14px;
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-contact .ct-mono {
  font-family: var(--ff-mono);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--chalk);
}

/* ---------- 首屏：信息 + 反馈表 ---------- */

.page-contact .ct-hero {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 22px;
  border: var(--edge);
  background: var(--pitch-night);
  box-shadow: var(--hard-shadow-lg);
}

.page-contact .ct-hero__intro {
  padding: 32px 22px 30px;
  background: var(--pitch-deep);
  border-bottom: var(--edge);
}

.page-contact .ct-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(1.9rem, 6vw, 3.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.page-contact .ct-hero__lead {
  margin: 0 0 26px;
  max-width: 46ch;
  color: var(--dust);
  font-size: 1rem;
}

.page-contact .ct-hero__scopes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-hero__scopes li {
  padding: 6px 12px;
  border: 2px solid var(--line-green);
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--chalk);
}

.page-contact .ct-hero__form {
  padding: 32px 22px 30px;
  background: var(--pitch-night);
}

.page-contact .ct-form {
  display: flex;
  flex-direction: column;
}

.page-contact .ct-form__no {
  font-family: var(--ff-display);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-contact .ct-form__hint {
  margin: 6px 0 18px;
  max-width: 40ch;
  font-size: 0.88rem;
  color: var(--dust);
}

.page-contact .ct-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 2px solid var(--line-green);
  transition: border-color var(--ease);
}

.page-contact .ct-field:focus-within {
  border-bottom-color: var(--sand);
}

.page-contact .ct-field label {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dust);
}

.page-contact .ct-field input,
.page-contact .ct-field textarea,
.page-contact .ct-field select {
  width: 100%;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--chalk);
  font-family: var(--ff-mono);
  font-size: 1rem;
  line-height: 1.6;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  border-radius: 0;
}

.page-contact .ct-field textarea {
  resize: vertical;
  min-height: 74px;
}

.page-contact .ct-field input::placeholder,
.page-contact .ct-field textarea::placeholder {
  color: #5F7A6D;
}

.page-contact .ct-field option {
  color: var(--pitch-deep);
  background: var(--chalk);
}

.page-contact .ct-field--select {
  position: relative;
}

.page-contact .ct-field--select::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 24px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--sand);
  pointer-events: none;
}

.page-contact .ct-form__note {
  margin: 20px 0 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--dust);
}

/* ---------- 三类事由 ---------- */

.page-contact .ct-reasons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 68px;
  padding-bottom: 8px;
}

.page-contact .ct-reasons__lead {
  margin: 0;
  max-width: 62ch;
  color: var(--dust);
  font-size: 1rem;
}

.page-contact .ct-reasons__figure {
  border: var(--edge);
  background: var(--pitch-night);
}

.page-contact .ct-reason {
  border: var(--edge);
  background: var(--pitch-night);
}

.page-contact .ct-reason + .ct-reason {
  margin-top: 14px;
}

.page-contact .ct-reason__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  transition: background var(--ease);
}

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

.page-contact .ct-reason__sum::after {
  content: "+";
  font-family: var(--ff-mono);
  font-size: 1.2rem;
  color: var(--sand);
  line-height: 1;
}

.page-contact .ct-reason[open] .ct-reason__sum::after {
  content: "–";
}

.page-contact .ct-reason__sum:hover {
  background: var(--pitch-mid);
}

.page-contact .ct-reason__no {
  font-family: var(--ff-mono);
  font-size: 0.92rem;
  color: var(--sand);
}

.page-contact .ct-reason__ttl {
  font-size: 1.02rem;
  font-weight: 700;
}

.page-contact .ct-reason__body {
  padding: 4px 18px 20px;
  border-top: 2px solid var(--line-green);
}

.page-contact .ct-reason__body > p {
  margin: 14px 0 14px;
  font-size: 0.92rem;
  color: var(--dust);
}

.page-contact .ct-reason__body ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-reason__body li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 10px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--dust);
}

.page-contact .ct-reason__body li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 10px;
  background: var(--sand);
}

/* ---------- 联络点 ---------- */

.page-contact .ct-point {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: 62px;
  padding-bottom: 60px;
}

.page-contact .ct-point__media .yk-figure {
  border: var(--edge);
  background: var(--pitch-night);
}

.page-contact .ct-info {
  margin: 24px 0 0;
}

.page-contact .ct-info__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-top: 2px solid var(--line-green);
}

.page-contact .ct-info__row:last-child {
  border-bottom: 2px solid var(--line-green);
}

.page-contact .ct-info dt {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-contact .ct-info dd {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--dust);
}

.page-contact .ct-info dd .ct-mono {
  font-size: 1.1rem;
}

.page-contact .ct-addr {
  display: inline-block;
  word-break: break-word;
  line-height: 1.6;
}

.page-contact .ct-point__boundary {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--flag-red);
  background: var(--pitch-night);
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--dust);
}

/* ---------- 合作洽谈 ---------- */

.page-contact .ct-coop {
  padding-top: 8px;
  padding-bottom: 64px;
}

.page-contact .ct-coop__lead {
  margin: 0 0 30px;
  max-width: 66ch;
  color: var(--dust);
  font-size: 1rem;
}

.page-contact .ct-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .ct-coop__item {
  padding: 22px 20px;
  border: var(--edge);
  background: var(--pitch-night);
  box-shadow: var(--hard-shadow);
  transition: border-color var(--ease), background var(--ease);
}

.page-contact .ct-coop__item:hover {
  border-color: var(--sand);
  background: var(--pitch-mid);
}

.page-contact .ct-coop__kicker {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line-green);
  font-family: var(--ff-display);
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-contact .ct-coop__item > p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--dust);
}

.page-contact .ct-coop__foot {
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: 2px solid var(--line-green);
  font-size: 0.92rem;
  color: var(--dust);
}

/* ---------- 处理时间线 ---------- */

.page-contact .ct-track {
  padding-bottom: 20px;
}

.page-contact .ct-track__list {
  display: grid;
  grid-template-columns: 1fr;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border: var(--edge);
}

.page-contact .ct-step {
  padding: 24px 20px 22px;
  background: var(--pitch-night);
  border-bottom: var(--edge);
}

.page-contact .ct-step:last-child {
  border-bottom: 0;
}

.page-contact .ct-step::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 16px;
  background: var(--sand);
}

.page-contact .ct-step__no {
  display: block;
  font-family: var(--ff-mono);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--line-green);
  margin-bottom: 10px;
}

.page-contact .ct-step__name {
  margin-bottom: 10px;
}

.page-contact .ct-step > p {
  margin: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--dust);
}

.page-contact .ct-step__more {
  border-top: 2px solid var(--line-green);
  padding-top: 10px;
}

.page-contact .ct-step__more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--sand);
  transition: color var(--ease);
}

.page-contact .ct-step__more summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-step__more summary:hover {
  color: var(--chalk);
}

.page-contact .ct-step__more p {
  margin: 12px 0 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--dust);
}

.page-contact .ct-track__foot {
  margin: 24px 0 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--dust);
}

/* ---------- 平板 ---------- */

@media (min-width: 700px) {
  .page-contact .ct-hero__intro,
  .page-contact .ct-hero__form {
    padding: 40px 34px 38px;
  }

  .page-contact .ct-info__row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .ct-coop__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .ct-coop__item:nth-child(2) {
    margin-top: 30px;
  }

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

  .page-contact .ct-step:nth-child(2n) {
    border-right: 0;
  }

  .page-contact .ct-step:nth-child(3) {
    border-bottom: 0;
  }

  .page-contact .ct-step:nth-child(4) {
    border-bottom: 0;
  }

  .page-contact .ct-step:nth-child(odd) {
    border-right: var(--edge);
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-contact .ct-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-contact .ct-hero__intro {
    padding: 52px 42px 46px;
    border-bottom: 0;
    border-right: 3px solid var(--sand);
  }

  .page-contact .ct-hero__form {
    padding: 46px 42px 44px;
  }

  .page-contact .ct-reasons {
    grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
    gap: 44px 44px;
    padding-top: 86px;
  }

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

  .page-contact .ct-point {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
    padding-top: 78px;
    padding-bottom: 74px;
  }

  .page-contact .ct-coop__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-contact .ct-coop__item:nth-child(2) {
    margin-top: 34px;
  }

  .page-contact .ct-coop__item:nth-child(3) {
    margin-top: 68px;
  }

  .page-contact .ct-track__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .ct-step {
    border-right: var(--edge);
    border-bottom: 0;
  }

  .page-contact .ct-step:nth-child(odd) {
    border-right: var(--edge);
  }

  .page-contact .ct-step:last-child {
    border-right: 0;
  }
}