.page-contact {
  --pc-gap: clamp(14px, 2.2vw, 26px);
  --pc-pad: clamp(18px, 3vw, 30px);
}

/* 首屏受理台 */
.page-contact .desk-hero {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(to right, rgba(143, 163, 181, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 163, 181, 0.08) 1px, transparent 1px);
  background-size: 56px 56px;
  padding: clamp(28px, 5vw, 60px) var(--pc-pad);
  box-shadow: var(--hard-shadow);
}

.page-contact .desk-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--cyan) 0 34%, var(--signal) 34% 52%, var(--line-strong) 52% 100%);
}

.page-contact .desk-hero__label {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .desk-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .desk-hero__lead {
  margin: 0 0 28px;
  max-width: 64ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .desk-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 章节标题 */
.page-contact .sec-head {
  margin-bottom: var(--pc-gap);
}

.page-contact .sec-head__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .sec-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.25;
  color: var(--paper);
}

.page-contact .sec-head--dark .sec-head__label {
  color: var(--signal);
}

.page-contact .sec-head--dark .sec-head__title {
  color: var(--ink);
}

.page-contact .lede {
  margin: 0 0 20px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

/* 三条联络通道 */
.page-contact .channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px var(--pc-pad) 24px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  top: -2px;
  right: -2px;
  width: 14px;
  height: 14px;
  background: var(--line-strong);
  transition: background var(--dur) var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: var(--hard-shadow);
}

.page-contact .channel:hover::after,
.page-contact .channel:focus-within::after {
  background: var(--cyan);
}

.page-contact .channel__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--quiet);
}

.page-contact .channel__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.3;
  color: var(--paper);
}

.page-contact .channel__value {
  margin: 0;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .channel__use {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  border-left: 2px solid var(--line);
  padding-left: 12px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .channel:hover .channel__use,
.page-contact .channel:focus-within .channel__use {
  border-left-color: var(--cyan);
  color: var(--paper);
}

.page-contact .channel .btn,
.page-contact .channel .copy-btn {
  margin-top: auto;
  align-self: flex-start;
}

/* 提交清单 */
.page-contact .checklist {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  padding: 16px 18px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .checklist__item:hover {
  border-color: var(--line-strong);
}

.page-contact .checklist__item:has(.checklist__box:checked) {
  border-color: var(--cyan);
  background: rgba(0, 230, 178, 0.05);
}

.page-contact .checklist__box {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  border: 2px solid var(--line-strong);
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .checklist__box:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-contact .checklist__box:checked {
  border-color: var(--cyan);
  background: rgba(0, 230, 178, 0.14);
}

.page-contact .checklist__box:checked::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--cyan);
}

.page-contact .checklist__body {
  display: grid;
  gap: 5px;
  cursor: pointer;
}

.page-contact .checklist__title {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--cyan);
}

.page-contact .checklist__desc {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-contact .checklist__box:checked + .checklist__body .checklist__desc {
  color: var(--paper);
}

.page-contact .callout {
  border-left-color: var(--signal);
}

.page-contact .callout a {
  color: var(--cyan);
}

/* 侧栏常见问题 */
.page-contact .contact-aside {
  border-top: 2px solid var(--line);
  padding-top: 18px;
}

.page-contact .contact-aside__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--paper);
}

.page-contact .contact-aside .index-list__key {
  display: block;
  padding: 9px 0;
  font-size: 14.5px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-contact .contact-aside .index-list__key:hover,
.page-contact .contact-aside .index-list__key:focus-visible {
  color: var(--cyan);
  padding-left: 6px;
}

.page-contact .contact-aside__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--quiet);
}

/* 企业对接 */
.page-contact .plain-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .plain-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 10px;
  background: var(--cyan);
}

.page-contact .deal-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-contact .deal-list .index-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .deal-list .index-list__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--cyan);
}

.page-contact .deal-list .index-list__val {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* 受理流程 */
.page-contact .flow {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .flow__step {
  position: relative;
  padding: 18px 20px 18px 22px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  border-left: 4px solid var(--line-strong);
  transition: border-left-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .flow__step:hover {
  border-left-color: var(--cyan);
  transform: translateX(2px);
}

.page-contact .flow__no {
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--signal);
}

.page-contact .flow__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.35;
  color: var(--paper);
}

.page-contact .flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 图片 */
.page-contact .media {
  margin: 0;
}

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

.page-contact .media__caption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 站点信息（暖纸白分区） */
.page-contact .section--paper {
  color: var(--ink);
}

.page-contact .site-visual {
  border: 2px solid var(--line);
  box-shadow: var(--hard-shadow);
  margin-bottom: var(--pc-gap);
}

.page-contact .section--paper .media__caption {
  color: #5A6B7C;
}

.page-contact .site-facts {
  margin: 0;
  border-top: 2px solid rgba(10, 22, 34, 0.22);
}

.page-contact .site-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(10, 22, 34, 0.16);
}

.page-contact .site-facts__key {
  font-size: 12.5px;
  letter-spacing: 1px;
  color: #5A6B7C;
}

.page-contact .site-facts__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .site-facts__note {
  margin: 18px 0 0;
  padding: 14px 16px;
  background: rgba(10, 22, 34, 0.06);
  border-left: 4px solid var(--signal);
  font-size: 14.5px;
  line-height: 1.8;
  color: #3A4A58;
}

/* 断点 */
@media (min-width: 600px) {
  .page-contact .deal-list .index-list__item {
    grid-template-columns: 130px 1fr;
    gap: 16px;
    align-items: baseline;
  }

  .page-contact .site-facts__row {
    grid-template-columns: 130px 1fr;
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 880px) {
  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel::after,
  .page-contact .channel__use,
  .page-contact .checklist__item,
  .page-contact .checklist__box,
  .page-contact .checklist__desc,
  .page-contact .contact-aside .index-list__key,
  .page-contact .flow__step {
    transition: none;
  }

  .page-contact .channel:hover,
  .page-contact .channel:focus-within {
    transform: none;
  }

  .page-contact .flow__step:hover {
    transform: none;
  }
}
<<<END>>>