.page-contact {
  --c-gap: clamp(18px, 3.4vw, 36px);
  position: relative;
  color: var(--text);
  background:
    radial-gradient(900px 520px at 92% -6%, rgba(79, 227, 208, .08), transparent 62%),
    radial-gradient(680px 460px at -8% 34%, rgba(255, 138, 61, .06), transparent 66%);
}

.page-contact .section {
  padding-block: clamp(40px, 6.5vw, 80px);
  border-top: 1px solid var(--line);
}

.page-contact .contact-hero {
  border-top: 0;
  padding-block: clamp(26px, 4.5vw, 54px) clamp(34px, 6vw, 72px);
}

.page-contact .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .22em;
  color: var(--mid);
  margin: 0;
}

.page-contact .eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 22px;
  height: 2px;
  background: var(--cyan);
}

.page-contact h1 {
  margin: 16px 0 0;
  max-width: 17ch;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--head);
}

.page-contact h2 {
  margin: 12px 0 0;
  max-width: 24ch;
  font-weight: 800;
  font-size: clamp(1.4rem, 3.6vw, 2.35rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--head);
}

.page-contact h3 {
  margin: 0;
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--head);
}

.page-contact .lede {
  margin: 18px 0 0;
  max-width: 66ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 01 客服渠道 ---------- */

.page-contact .channel-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-contact .channel-stack {
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
  align-content: start;
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform .18s ease-out, border-color .18s ease-out;
}

.page-contact .channel-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-contact .channel-card--phone:hover {
  border-color: var(--orange);
}

.page-contact .channel-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  background: var(--clay);
  color: var(--ink);
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .2em;
}

.page-contact .channel-tag--phone {
  background: var(--orange);
}

.page-contact .channel-value {
  display: block;
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: clamp(1.05rem, 3.4vw, 1.55rem);
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.3;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .channel-value--phone {
  color: var(--orange);
}

.page-contact .channel-desc {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: .9375rem;
  line-height: 1.75;
}

.page-contact .channel-notes {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  display: grid;
  gap: 8px;
  border-top: 1px dashed var(--line);
}

.page-contact .channel-notes li {
  position: relative;
  padding-left: 16px;
  font-size: .90625rem;
  line-height: 1.65;
  color: var(--text);
}

.page-contact .channel-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 7px;
  height: 2px;
  background: var(--mid);
}

.page-contact .channel-media,
.page-contact .desk-media {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--panel-2);
  overflow: hidden;
}

.page-contact .channel-media img,
.page-contact .desk-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 02 问题分类 ---------- */

.page-contact .tabs {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-contact .tab-list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-contact .tab {
  flex: 0 0 auto;
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 12px 14px;
  font: inherit;
  font-size: .9375rem;
  color: var(--mid);
  cursor: pointer;
  transition: color .16s ease-out, border-color .16s ease-out;
}

.page-contact .tab:hover {
  color: var(--head);
}

.page-contact .tab[aria-selected="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

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

.page-contact .tab-panel {
  padding-top: clamp(22px, 3vw, 32px);
}

.page-contact .tab-panel[hidden] {
  display: none;
}

.page-contact .tab-panel h3 {
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
}

.page-contact .tab-panel > p {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: .96875rem;
  line-height: 1.78;
}

.page-contact .material-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .material-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  font-size: .90625rem;
  line-height: 1.65;
}

.page-contact .material-key {
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--clay);
}

/* ---------- 03 地址与备案 ---------- */

.page-contact .desk-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
  align-items: start;
}

.page-contact .desk-copy > p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
}

.page-contact .desk-list {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .desk-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .desk-list dt {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--mid);
}

.page-contact .desk-list dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--head);
}

.page-contact .desk-list dd.mono {
  font-family: var(--mono);
  letter-spacing: .01em;
  word-break: break-all;
}

.page-contact .notice {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 14px 18px;
  background: rgba(216, 195, 160, .07);
  border-left: 3px solid var(--clay);
  font-size: .90625rem;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 04 合作与投稿 ---------- */

.page-contact .collab-grid {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 22px);
}

.page-contact .collab-card {
  padding: clamp(20px, 3vw, 26px);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  transition: transform .18s ease-out, border-color .18s ease-out;
}

.page-contact .collab-card:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-contact .collab-card p {
  margin: 12px 0 0;
  font-size: .9375rem;
  line-height: 1.72;
}

.page-contact .collab-card ul {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  display: grid;
  gap: 7px;
  border-top: 1px dashed var(--line);
}

.page-contact .collab-card li {
  position: relative;
  padding-left: 15px;
  font-size: .875rem;
  line-height: 1.6;
}

.page-contact .collab-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 2px;
  background: var(--mid);
}

/* ---------- 05 处理流程 ---------- */

.page-contact .flow-steps {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .flow-step {
  position: relative;
  padding: 26px 22px 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform .18s ease-out, border-color .18s ease-out;
}

.page-contact .flow-step::after {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  top: -1px;
  height: 3px;
  background: var(--cyan);
}

.page-contact .flow-step:nth-child(2)::after {
  background: var(--clay);
}

.page-contact .flow-step:nth-child(3)::after {
  background: var(--orange);
}

.page-contact .flow-step:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-contact .flow-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-contact .flow-step:nth-child(2) .flow-num {
  color: var(--clay);
}

.page-contact .flow-step:nth-child(3) .flow-num {
  color: var(--orange);
}

.page-contact .flow-step p {
  margin: 12px 0 0;
  font-size: .9375rem;
  line-height: 1.75;
}

/* ---------- 结尾指引 ---------- */

.page-contact .next-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(24px, 4vw, 42px);
  background: var(--panel-2);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}

.page-contact .next-copy h2 {
  margin-top: 0;
  max-width: 22ch;
}

.page-contact .next-copy p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: .96875rem;
  line-height: 1.78;
}

.page-contact .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-contact .next-links .btn {
  flex: 1 1 auto;
  text-align: center;
}

.page-contact .next-links .btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-contact .material-list li {
    grid-template-columns: 96px 1fr;
    gap: 16px;
    align-items: baseline;
  }

  .page-contact .desk-list > div {
    grid-template-columns: 130px 1fr;
    gap: 20px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-contact .collab-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

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

  .page-contact .desk-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-contact .next-band {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-contact .next-links {
    flex-direction: column;
    align-items: stretch;
  }

  .page-contact .next-links .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 1180px) {
  .page-contact .channel-layout {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .collab-card,
  .page-contact .flow-step {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .collab-card:hover,
  .page-contact .flow-step:hover {
    transform: none;
  }
}