.page-contact {
  color-scheme: dark;
  padding: 26px 0 clamp(56px, 9vw, 104px);
  background:
    linear-gradient(102deg, rgba(10, 42, 50, .9) 0%, rgba(10, 42, 50, .35) 42%, rgba(4, 22, 27, 0) 72%);
}

.page-contact .crumbs {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-contact .crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--cyan);
}

.page-contact .contact-head {
  max-width: 62ch;
  margin: 26px 0 clamp(30px, 5vw, 56px);
}

.page-contact .contact-head .h1 {
  margin: 12px 0 18px;
}

.page-contact .contact-head__hl {
  color: var(--amber);
}

.page-contact .contact-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 58px);
  align-items: start;
}

/* ---------- 左栏：渠道胶囊 ---------- */

.page-contact .contact-aside {
  min-width: 0;
}

.page-contact .channels {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .channel {
  display: grid;
  gap: 5px;
  padding: 16px 20px;
  border-radius: 26px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(37, 240, 210, .05), rgba(10, 42, 50, .92));
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease), background var(--t) var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  border-color: var(--cyan);
  transform: translateX(3px);
}

.page-contact .channel--main {
  border-color: rgba(37, 240, 210, .42);
  box-shadow: inset 0 0 0 1px rgba(37, 240, 210, .08);
}

.page-contact .channel__kind {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-contact .channel__value {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.55;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .channel--main .channel__value {
  color: var(--cyan);
}

.page-contact .channel__use {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .aside-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 右栏：内容区 ---------- */

.page-contact .contact-main {
  min-width: 0;
  display: grid;
  gap: clamp(40px, 6vw, 74px);
}

.page-contact .section {
  scroll-margin-top: 24px;
}

.page-contact .section__lede {
  max-width: 58ch;
  margin: 10px 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* 请求类型 */

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

.page-contact .req {
  position: relative;
  padding: 18px 0 18px 18px;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 9px;
}

.page-contact .req::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--line);
  transition: background var(--t) var(--ease);
}

.page-contact .req:hover::before {
  background: var(--cyan);
}

.page-contact .req .chip {
  justify-self: start;
}

.page-contact .req__title {
  margin: 0;
  font-size: 17px;
}

.page-contact .req__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
}

/* 信息清单 */

.page-contact .checklist,
.page-contact .coop-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .checklist li,
.page-contact .coop-checklist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
}

.page-contact .coop-checklist li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .checklist__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--cyan);
}

.page-contact .coop-checklist .checklist__idx {
  color: var(--lava);
}

.page-contact .checklist__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

/* 处理流程 */

.page-contact .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-contact .flow__step {
  position: relative;
  padding-left: 28px;
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: -26px;
  width: 1px;
  background: var(--line);
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__node {
  position: absolute;
  left: 0;
  top: 4px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 193, 78, .16);
  transition: box-shadow var(--t) var(--ease);
}

.page-contact .flow__step:hover .flow__node {
  box-shadow: 0 0 0 7px rgba(242, 193, 78, .24);
}

.page-contact .flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-contact .flow__title {
  margin: 0;
  font-size: 16px;
}

.page-contact .flow__desc {
  margin: 7px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .flow-figure {
  margin-top: clamp(26px, 4vw, 40px);
}

/* 合作方向 */

.page-contact .coop-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .coop {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.page-contact .coop__label {
  color: var(--lava);
}

.page-contact .coop h3 {
  margin: 0;
  font-size: 17px;
}

.page-contact .coop p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
}

.page-contact .disclosure {
  margin-top: 22px;
}

.page-contact .coop-banner {
  margin: 0;
}

/* 底部注释带 */

.page-contact .contact-note {
  margin-top: clamp(40px, 6vw, 72px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: baseline;
}

.page-contact .contact-note .note-band__val {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .01em;
}

/* ---------- 响应式 ---------- */

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

  .page-contact .flow__step {
    padding: 26px 22px 0 0;
  }

  .page-contact .flow__step::before {
    left: 6px;
    right: 0;
    top: 6px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-contact .flow__node {
    top: 0;
    left: 0;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-contact .contact-aside {
    position: sticky;
    top: 22px;
  }

  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid var(--line);
  }

  .page-contact .coop {
    padding: 20px 22px 22px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-contact .coop:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-contact .coop:not(:first-child) {
    padding-left: 22px;
  }
}

@media (max-width: 479px) {
  .page-contact .channel {
    padding: 14px 16px;
    border-radius: 22px;
  }

  .page-contact .channel__value {
    font-size: 14px;
  }

  .page-contact .checklist li,
  .page-contact .coop-checklist li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}
<<<END>>>