.page-contact {
  --c-sec: clamp(48px, 8vw, 100px);
  --c-pad: clamp(22px, 3.2vw, 38px);
  background:
    radial-gradient(1100px 520px at 80% -10%, rgba(123, 77, 255, 0.22), transparent 68%),
    radial-gradient(820px 460px at 2% 26%, rgba(33, 243, 224, 0.09), transparent 70%),
    var(--ink-900);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
}
.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}
.page-contact .breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--line);
}
.page-contact .breadcrumb a {
  color: var(--text-mute);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}
.page-contact .breadcrumb a:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}
.page-contact .breadcrumb [aria-current="page"] {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: clamp(16px, 2.6vw, 30px);
  padding: clamp(30px, 5vw, 58px) 0 clamp(34px, 6vw, 72px);
}
.page-contact .contact-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mint);
}
.page-contact .contact-hero__eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet-a), var(--mint));
}
.page-contact .contact-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 18ch;
  font-size: clamp(32px, 7vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
}
.page-contact .contact-hero__sub {
  display: block;
  margin-top: 12px;
  font-size: clamp(17px, 3vw, 28px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-mute);
}
.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.9;
  color: var(--text-mute);
}
.page-contact .contact-hero .side-note {
  display: none;
}
@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1fr) 130px;
    align-items: end;
  }
  .page-contact .contact-hero .side-note {
    display: block;
    justify-self: end;
    align-self: start;
    margin-top: 14px;
  }
}

/* ---------- 区块公共 ---------- */
.page-contact .sec {
  padding: var(--c-sec) 0;
}
.page-contact .sec + .sec {
  border-top: 1px dashed var(--line);
}
.page-contact .sec-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 46px);
  max-width: 62ch;
}
.page-contact .sec-head__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}
.page-contact .sec-head h2 {
  margin: 0;
  font-size: clamp(24px, 3.8vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
}
.page-contact .sec-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mute);
}

/* ---------- 联络渠道 ---------- */
.page-contact .channels__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-contact .channels__list {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}
.page-contact .channel-card {
  position: relative;
  padding: var(--c-pad);
  background: var(--ink-700);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}
.page-contact .channel-card:hover {
  border-color: var(--mint);
  box-shadow: var(--shadow-mint);
  transform: translate(-2px, -2px);
}
.page-contact .channel-card__idx {
  position: absolute;
  top: var(--c-pad);
  right: var(--c-pad);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-mute);
}
.page-contact .channel-card__title {
  margin: 0 0 14px;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-contact .channel-card__value {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 21px);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--mint);
  overflow-wrap: anywhere;
}
.page-contact .channel-card--post .channel-card__value {
  font-size: clamp(15px, 2vw, 19px);
  color: var(--text);
}
.page-contact .channel-card__desc {
  margin: 0 0 18px;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mute);
}
.page-contact .channel-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .channels__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}
.page-contact .channels__figure {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
}
.page-contact .channels__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .channels__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--text-mute);
}
@media (min-width: 1000px) {
  .page-contact .channels__grid {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
  }
}

/* ---------- 咨询分类 ---------- */
.page-contact .topics__list {
  display: grid;
  gap: 14px;
}
.page-contact .topic {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-contact .topic[open] {
  border-left-color: var(--mint);
  background: var(--ink-700);
}
.page-contact .topic summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.6vw, 26px);
  cursor: pointer;
  list-style: none;
}
.page-contact .topic summary::-webkit-details-marker {
  display: none;
}
.page-contact .topic__label {
  margin: 0;
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-contact .topic__hint {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--orange);
  white-space: nowrap;
}
.page-contact .topic[open] .topic__hint {
  color: var(--mint);
}
.page-contact .topic__body {
  padding: 0 clamp(16px, 2.6vw, 26px) clamp(18px, 2.6vw, 26px);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-mute);
}
.page-contact .topic__body p {
  margin: 0 0 12px;
}
.page-contact .topic__body ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 18px;
}
.page-contact .topic__body li::marker {
  color: var(--mint);
}
@media (min-width: 760px) {
  .page-contact .topics__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 回复节奏 ---------- */
.page-contact .window__grid {
  display: grid;
  gap: 16px;
}
.page-contact .window-card {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--ink-800);
  border: 2px solid var(--line);
}
.page-contact .window-card--ok {
  border-top: 4px solid var(--ok);
}
.page-contact .window-card--warn {
  border-top: 4px solid var(--amber);
}
.page-contact .window-card--doc {
  border-top: 4px solid var(--mint);
}
.page-contact .window-card__time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 27px);
  letter-spacing: 0.02em;
  color: var(--text);
}
.page-contact .window-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.page-contact .window-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-mute);
}
.page-contact .inline-link {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 243, 224, 0.5);
}
.page-contact .inline-link:hover {
  border-bottom-color: var(--mint);
}
@media (min-width: 860px) {
  .page-contact .window__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 内容协作 ---------- */
.page-contact .collab__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}
.page-contact .collab__prose {
  display: grid;
  gap: 16px;
}
.page-contact .collab__prose p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-mute);
}
.page-contact .collab__checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ink-700);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}
.page-contact .collab__checklist li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: 1px solid var(--line);
}
.page-contact .collab__checklist li:last-child {
  border-bottom: 0;
}
.page-contact .collab__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mint);
}
@media (min-width: 920px) {
  .page-contact .collab__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

/* ---------- 通信地址 ---------- */
.page-contact .address__panel {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 260px;
  overflow: hidden;
  background: var(--ink-800);
  border: 2px solid var(--line);
}
.page-contact .address__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.38;
}
.page-contact .address__content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: clamp(22px, 3.6vw, 46px);
  background: linear-gradient(180deg, rgba(7, 11, 34, 0) 0%, rgba(7, 11, 34, 0.88) 48%);
}
.page-contact .address__mono {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.8vw, 28px);
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--text);
}
.page-contact .address__hint {
  margin: 0;
  max-width: 54ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-mute);
}

/* ---------- 相邻入口 ---------- */
.page-contact .endlinks {
  display: grid;
  gap: 12px;
}
.page-contact .endlink {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--ink-800);
  border: 2px solid var(--line);
  color: var(--text);
  text-decoration: none;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.page-contact .endlink span {
  font-size: 13.5px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--text-mute);
}
.page-contact .endlink:hover {
  border-color: var(--mint);
  transform: translateY(-3px);
}
@media (min-width: 700px) {
  .page-contact .endlinks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .endlink,
  .page-contact .topic {
    transition: none;
  }
  .page-contact .channel-card:hover,
  .page-contact .endlink:hover {
    transform: none;
  }
}
<<<END>>>