.page-contact {
  --pc-line: var(--jy-hair-strong);
  --pc-solid: var(--jy-ink);
  overflow-x: hidden;
}

.page-contact__crumbs {
  width: 100%;
  max-width: var(--jy-max);
  margin-inline: auto;
  padding: clamp(12px, 2vw, 20px) var(--jy-pad) 0;
}

/* ---------- 首屏 ---------- */

.page-contact__hero {
  position: relative;
  padding-top: clamp(18px, 3vw, 34px);
}

.page-contact__hero-head {
  max-width: 72ch;
}

.page-contact__h1 {
  font-family: var(--jy-font-display);
  font-weight: 900;
  font-size: clamp(29px, 6.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.022em;
  color: var(--jy-mist);
  margin: 10px 0 0;
  max-width: 19ch;
}

.page-contact__lead {
  font-family: var(--jy-font-body);
  font-size: clamp(15px, 1.75vw, 17.5px);
  line-height: 1.78;
  color: var(--jy-silver);
  max-width: 64ch;
  margin: 16px 0 0;
}

.page-contact__deck {
  display: grid;
  gap: 22px;
  margin-top: clamp(26px, 4.6vw, 46px);
}

.page-contact__deck-title {
  display: inline-block;
  font-family: var(--jy-font-editorial);
  font-size: clamp(17px, 2.1vw, 20px);
  font-weight: 600;
  color: var(--jy-mist);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--jy-orange);
}

/* 合作方向可展开面板 */

.page-contact__channel {
  background: var(--jy-moss);
  border: 2px solid var(--pc-solid);
  border-left: 5px solid var(--jy-cyan);
  box-shadow: var(--jy-shadow-hard);
  margin-bottom: 12px;
  transition: border-left-color 160ms ease;
}

.page-contact__channel[open] {
  border-left-color: var(--jy-orange);
}

.page-contact__channel summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  font-family: var(--jy-font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.9vw, 17px);
  letter-spacing: 0.01em;
  color: var(--jy-mist);
}

.page-contact__channel summary::-webkit-details-marker {
  display: none;
}

.page-contact__channel summary::after {
  content: "+";
  flex: none;
  font-family: var(--jy-font-numeric);
  font-size: 16px;
  color: var(--jy-orange);
}

.page-contact__channel[open] summary::after {
  content: "–";
}

.page-contact__channel-num {
  flex: none;
  font-family: var(--jy-font-numeric);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--jy-cyan);
}

.page-contact__channel-name {
  flex: 1 1 auto;
}

.page-contact__channel-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--jy-hair);
}

.page-contact__channel-body p {
  font-family: var(--jy-font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--jy-silver);
  margin: 12px 0 0;
}

.page-contact__channel-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
}

.page-contact__channel-facts li {
  font-family: var(--jy-font-utility);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--jy-mist);
  border: 1px solid var(--pc-line);
  padding: 4px 9px;
}

/* 联系信息卡 */

.page-contact__card {
  background: var(--jy-night);
  border: 2px solid var(--pc-solid);
  box-shadow: var(--jy-shadow-panel);
}

.page-contact__card-media {
  margin: 0;
  border-bottom: 2px solid var(--pc-solid);
}

.page-contact__card-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-contact__card-body {
  padding: clamp(18px, 3vw, 26px);
}

.page-contact__card-tag {
  display: inline-block;
  font-family: var(--jy-font-utility);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--jy-night);
  background: var(--jy-cyan);
  padding: 3px 9px;
  margin: 0;
}

.page-contact__card-title {
  font-family: var(--jy-font-editorial);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 600;
  color: var(--jy-mist);
  margin: 12px 0 0;
}

.page-contact__card-list {
  margin: 16px 0 0;
  border-top: 1px solid var(--jy-hair);
}

.page-contact__card-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--jy-hair);
}

.page-contact__card-row dt {
  flex: none;
  min-width: 68px;
  font-family: var(--jy-font-utility);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--jy-silver);
}

.page-contact__card-row dd {
  flex: 1 1 auto;
  margin: 0;
}

.page-contact__mono {
  font-family: var(--jy-font-numeric);
  font-size: clamp(13.5px, 1.65vw, 15.5px);
  letter-spacing: 0.01em;
  color: var(--jy-cyan);
  overflow-wrap: anywhere;
}

.page-contact__card-note {
  font-family: var(--jy-font-body);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--jy-silver);
  margin: 14px 0 0;
}

.page-contact__card-btn {
  display: inline-block;
  margin-top: 18px;
  padding: 11px 20px;
  font-family: var(--jy-font-utility);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--jy-night);
  background: var(--jy-orange);
  border: 2px solid var(--pc-solid);
  box-shadow: 5px 5px 0 var(--jy-indigo);
  transition: background-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

.page-contact__card-btn:hover,
.page-contact__card-btn:focus-visible {
  background: var(--jy-cyan);
  box-shadow: 2px 2px 0 var(--jy-indigo);
  transform: translate(3px, 3px);
}

/* ---------- 通用小节标题 ---------- */

.page-contact__sec-head {
  max-width: 64ch;
}

.page-contact__h2 {
  font-family: var(--jy-font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.016em;
  color: var(--jy-mist);
  margin: 10px 0 0;
}

.page-contact__sec-lead {
  font-family: var(--jy-font-body);
  font-size: clamp(14.5px, 1.7vw, 16.5px);
  line-height: 1.78;
  color: var(--jy-silver);
  margin: 14px 0 0;
}

/* ---------- 流程 ---------- */

.page-contact__steps {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  border-left: 2px solid var(--pc-line);
}

.page-contact__step {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 34px) clamp(20px, 3.4vw, 38px);
}

.page-contact__step:last-child {
  padding-bottom: 0;
}

.page-contact__step::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 9px;
  width: 12px;
  height: 12px;
  background: var(--jy-night);
  border: 2px solid var(--jy-cyan);
  transform: rotate(45deg);
}

.page-contact__step-num {
  display: block;
  font-family: var(--jy-font-numeric);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--jy-orange);
}

.page-contact__step-title {
  font-family: var(--jy-font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.1vw, 21px);
  color: var(--jy-mist);
  margin: 10px 0 0;
}

.page-contact__step-text {
  font-family: var(--jy-font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--jy-silver);
  margin: 8px 0 0;
  max-width: 66ch;
}

.page-contact__step-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--jy-hair);
}

.page-contact__step-label {
  font-family: var(--jy-font-utility);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--jy-cyan);
}

.page-contact__step-val {
  font-family: var(--jy-font-body);
  font-size: 13px;
  color: var(--jy-mist);
  margin-right: 14px;
}

/* ---------- 对接入口 ---------- */

.page-contact__reach-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(22px, 3.6vw, 34px);
}

.page-contact__reach-card {
  background: var(--jy-moss);
  border: 2px solid var(--pc-solid);
  border-top: 6px solid var(--jy-cyan);
  box-shadow: var(--jy-shadow-hard);
  padding: clamp(18px, 2.6vw, 24px);
  transition: border-top-color 150ms ease, transform 150ms ease;
}

.page-contact__reach-card:hover {
  border-top-color: var(--jy-orange);
  transform: translateY(-4px);
}

.page-contact__reach-label {
  font-family: var(--jy-font-utility);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--jy-silver);
  margin: 0;
}

.page-contact__reach-value {
  margin: 12px 0 0;
  overflow-wrap: anywhere;
}

.page-contact__reach-addr {
  font-family: var(--jy-font-body);
  font-size: clamp(14.5px, 1.7vw, 15.5px);
  line-height: 1.72;
  color: var(--jy-mist);
}

.page-contact__reach-text {
  font-family: var(--jy-font-body);
  font-size: 14px;
  line-height: 1.76;
  color: var(--jy-silver);
  margin: 12px 0 0;
}

/* ---------- 资料准备 ---------- */

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

.page-contact__checklist {
  list-style: none;
  display: grid;
  gap: 12px;
  margin: clamp(22px, 3.6vw, 32px) 0 0;
  padding: 0;
}

.page-contact__check {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--jy-moss);
  border: 1px solid var(--pc-line);
  padding: 14px 16px;
  transition: border-color 150ms ease;
}

.page-contact__check:hover {
  border-color: var(--jy-cyan);
}

.page-contact__box {
  flex: none;
  width: 26px;
  height: 26px;
  margin-top: 2px;
  display: grid;
  place-items: center;
  border: 2px solid var(--jy-cyan);
  font-family: var(--jy-font-numeric);
  font-size: 12px;
  color: var(--jy-cyan);
}

.page-contact__check-title {
  font-family: var(--jy-font-display);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--jy-mist);
  margin: 0;
}

.page-contact__check-text {
  font-family: var(--jy-font-body);
  font-size: 14px;
  line-height: 1.74;
  color: var(--jy-silver);
  margin: 6px 0 0;
}

.page-contact__prep-note {
  font-family: var(--jy-font-body);
  font-size: 14px;
  line-height: 1.78;
  color: var(--jy-silver);
  margin: 20px 0 0;
}

.page-contact__prep-figure {
  margin: 0;
  border: 2px solid var(--pc-solid);
  box-shadow: var(--jy-shadow-panel);
  background: var(--jy-night);
}

.page-contact__prep-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-contact__prep-caption {
  font-family: var(--jy-font-editorial);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--jy-silver);
  padding: 12px 16px 16px;
  border-top: 1px solid var(--jy-hair);
}

/* ---------- 问答 ---------- */

.page-contact__faq-list {
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 3.6vw, 32px);
}

.page-contact__q {
  background: var(--jy-moss);
  border: 1px solid var(--pc-line);
  transition: border-color 150ms ease;
}

.page-contact__q[open] {
  border-color: var(--jy-cyan);
}

.page-contact__q summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 18px;
  font-family: var(--jy-font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.9vw, 17px);
  color: var(--jy-mist);
}

.page-contact__q summary::-webkit-details-marker {
  display: none;
}

.page-contact__q summary::before {
  content: "Q";
  flex: none;
  font-family: var(--jy-font-numeric);
  font-size: 12px;
  color: var(--jy-orange);
}

.page-contact__q-body {
  padding: 14px 18px 18px;
  border-top: 1px solid var(--jy-hair);
  font-family: var(--jy-font-body);
  font-size: 15px;
  line-height: 1.78;
  color: var(--jy-silver);
}

.page-contact__q-body p {
  margin: 0;
}

.page-contact__closing-panel {
  margin-top: clamp(26px, 4vw, 40px);
  padding: clamp(20px, 3.2vw, 32px);
}

.page-contact__closing-text {
  font-family: var(--jy-font-editorial);
  font-size: clamp(15px, 1.9vw, 17.5px);
  line-height: 1.82;
  color: var(--jy-ink);
  max-width: 62ch;
  margin: 0;
}

/* ---------- 桌面增强 ---------- */

@media (min-width: 780px) {
  .page-contact__reach-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-contact__deck {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact__card {
    transform: translateY(-30px);
  }

  .page-contact__prep-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact__prep-figure {
    transform: translateY(34px);
  }

  .page-contact__step-title,
  .page-contact__step-text {
    max-width: 70ch;
  }
}

@media (min-width: 1200px) {
  .page-contact__step {
    padding-left: 46px;
  }

  .page-contact__step-foot {
    max-width: 70ch;
  }
}

@media (max-width: 520px) {
  .page-contact__card-row dt {
    min-width: 100%;
  }

  .page-contact__step-val {
    margin-right: 8px;
  }
}
<<<END>>>