.page-contact {
  --pc-radius: 2px;
  --pc-shadow: 0 24px 60px -34px rgba(0, 0, 0, .95);
  background: var(--night);
  color: var(--chalk);
  padding-bottom: clamp(40px, 6vw, 84px);
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  color: var(--chalk);
  margin: 0;
}

.page-contact h2 {
  font-size: clamp(24px, 3.2vw, 42px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-contact h3 {
  font-size: clamp(18px, 1.9vw, 23px);
  line-height: 1.3;
  font-weight: 700;
}

.page-contact p {
  margin: 0;
}

.page-contact a {
  color: var(--gold);
  text-decoration: none;
  background-image: linear-gradient(var(--gold), var(--gold));
  background-repeat: no-repeat;
  background-size: 0 1px;
  background-position: 0 100%;
  transition: background-size var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact a:hover,
.page-contact a:focus-visible {
  color: var(--gold-light);
  background-size: 100% 1px;
  background-image: linear-gradient(var(--gold-light), var(--gold-light));
}

.page-contact .contact-crumb {
  padding-block: 14px 4px;
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .breadcrumb__item a {
  color: var(--mist);
  background: none;
}

.page-contact .breadcrumb__item a:hover {
  color: var(--gold-light);
}

.page-contact .breadcrumb__sep {
  color: var(--line);
}

/* ---------- 首屏联系面板 ---------- */

.page-contact .contact-hero {
  padding-top: clamp(10px, 2vw, 26px);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: stretch;
}

.page-contact .contact-hero__copy {
  position: relative;
  background: linear-gradient(158deg, var(--indigo) 0%, #111D40 58%, var(--night) 100%);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  box-shadow: var(--pc-shadow);
  padding: clamp(26px, 4vw, 52px);
}

.page-contact .contact-hero__copy::before,
.page-contact .contact-hero__copy::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--gold);
  pointer-events: none;
}

.page-contact .contact-hero__copy::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .contact-hero__copy::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-contact h1 {
  font-size: clamp(32px, 5.4vw, 60px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -.015em;
  transform: skewX(-1.5deg);
  margin: 14px 0 0;
}

.page-contact .contact-hero__copy .lede {
  margin-top: 18px;
  max-width: 46ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.75;
  color: var(--chalk);
}

.page-contact .contact-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  background: var(--line);
  overflow: hidden;
}

.page-contact .contact-strip__cell {
  background: rgba(14, 23, 48, .74);
  padding: 14px 16px 16px;
}

.page-contact .contact-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.05;
  color: var(--gold);
  font-weight: 700;
}

.page-contact .contact-strip__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-contact .contact-hero__hint {
  margin-top: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .contact-hero__media .media {
  height: 100%;
}

/* ---------- 章节头 ---------- */

.page-contact .contact-head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .contact-head h2 {
  margin-top: 10px;
}

.page-contact .contact-head__note,
.page-contact .contact-prep__body .muted {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 联络渠道 ---------- */

.page-contact .contact-channels {
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-channels__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
}

.page-contact .channel {
  background: var(--indigo);
  padding: clamp(20px, 2.6vw, 30px);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .channel:hover {
  background: #1A2A57;
  box-shadow: inset 0 0 0 1px var(--gold);
}

.page-contact .channel--gold {
  box-shadow: inset 0 2px 0 0 var(--gold);
}

.page-contact .channel__title {
  margin-top: 6px;
}

.page-contact .channel__value {
  margin-top: 14px;
  font-size: clamp(19px, 2.1vw, 26px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.35;
  letter-spacing: -.005em;
}

.page-contact .channel__value--mail,
.page-contact .channel__value--addr {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.35vw, 17px);
  word-break: break-word;
  line-height: 1.6;
}

.page-contact .channel__value--addr {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--chalk);
}

.page-contact .channel__use {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 合作类型 ---------- */

.page-contact .contact-coop {
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-coop__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
}

.page-contact .coop {
  position: relative;
  padding-left: 22px;
  border-left: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .coop:hover {
  border-left-color: var(--gold);
}

.page-contact .coop__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--red);
}

.page-contact .coop__title {
  margin-top: 6px;
}

.page-contact .coop__body {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--chalk);
}

.page-contact .fold {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.page-contact .fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  padding: 11px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  transition: color var(--dur) var(--ease);
}

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

.page-contact .fold__summary:hover {
  color: var(--gold-light);
}

.page-contact .fold__summary::after {
  content: "＋";
  font-family: var(--font-body);
  color: var(--mist);
}

.page-contact .fold[open] .fold__summary::after {
  content: "－";
  color: var(--gold-light);
}

.page-contact .fold__body {
  padding: 0 0 14px;
  border-left: 2px solid var(--gold);
  padding-left: 16px;
}

.page-contact .fold__body ul {
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 咨询前准备 ---------- */

.page-contact .contact-prep__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-contact .contact-prep__body h2 {
  margin-top: 10px;
}

.page-contact .prep-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
}

.page-contact .prep-list li {
  position: relative;
  background: var(--night);
  padding: 15px 18px 15px 46px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--chalk);
}

.page-contact .prep-list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 10px;
  height: 10px;
  margin-top: -5px;
  border: 1px solid var(--gold);
}

.page-contact .prep-list li::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  background: var(--gold);
}

.page-contact .contact-prep__links {
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应节奏 ---------- */

.page-contact .flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  overflow: hidden;
}

.page-contact .flow__step {
  background: var(--indigo);
  padding: clamp(20px, 2.6vw, 30px);
  transition: background var(--dur) var(--ease);
}

.page-contact .flow__step:hover {
  background: #1A2A57;
}

.page-contact .flow__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--green);
}

.page-contact .flow__step h3 {
  margin-top: 10px;
}

.page-contact .flow__step p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 运营中心与备案 ---------- */

.page-contact .registry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  border-radius: var(--pc-radius);
  background: linear-gradient(100deg, rgba(22, 35, 74, .92) 0%, rgba(14, 23, 48, .92) 100%);
}

.page-contact .registry__addr {
  margin-top: 10px;
  font-size: clamp(17px, 1.9vw, 22px);
  line-height: 1.55;
  color: var(--chalk);
}

.page-contact .registry__meta {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .registry__side {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.page-contact .registry__region {
  font-size: 17px;
  color: var(--chalk);
}

.page-contact .registry__icp {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  padding: 6px 10px;
}

@media (min-width: 720px) {
  .page-contact .contact-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-contact .contact-coop__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 56px);
  }

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

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

  .page-contact .registry__side {
    align-items: flex-end;
    text-align: right;
  }
}