.page-contact {
  --ct-pad: clamp(52px, 7vw, 104px);
  --ct-gap: clamp(28px, 4vw, 56px);
  display: block;
}

.page-contact .breadcrumbs {
  padding-top: clamp(20px, 3vw, 34px);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease-out, border-color 0.16s ease-out;
}

.page-contact .breadcrumbs a:hover,
.page-contact .breadcrumbs a:focus-visible {
  color: var(--bone);
  border-bottom-color: var(--lava);
}

.page-contact .ct-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 54px) 0 var(--ct-pad);
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-hero::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 58%;
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0 1px,
    transparent 1px 76px
  );
  opacity: 0.3;
  pointer-events: none;
}

.page-contact .ct-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  align-items: center;
}

.page-contact .ct-hero__title {
  margin: 16px 0 0;
  font-size: clamp(30px, 5vw, 62px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--bone);
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-contact .ct-hero__lede {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--soft);
}

.page-contact .ct-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .ct-hero__meta li {
  position: relative;
  padding-left: 16px;
}

.page-contact .ct-hero__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--cyan);
  transform: translateY(-50%);
}

.page-contact .ct-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-contact .ct-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 渠道区 ---------- */

.page-contact .ct-channels {
  padding: var(--ct-pad) 0;
}

.page-contact .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lava);
}

.page-contact .chapter-title {
  margin: 12px 0 0;
  font-size: clamp(21px, 2.8vw, 31px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-contact .chapter-desc {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .ct-channels__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  margin-top: clamp(26px, 4vw, 48px);
}

.page-contact .ct-ch {
  display: flex;
  gap: clamp(14px, 2vw, 26px);
  padding: clamp(20px, 3vw, 32px) 0;
  border-top: 1px solid var(--line);
  transition: transform 0.18s ease-out, border-color 0.18s ease-out;
}

.page-contact .ct-ch:nth-of-type(1) {
  border-top-color: var(--lava);
}

.page-contact .ct-ch:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-ch:hover,
.page-contact .ct-ch:focus-within {
  transform: translateY(-2px);
  border-color: var(--lava);
}

.page-contact .ct-ch__idx {
  flex: 0 0 48px;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lava);
}

.page-contact .ct-ch__body {
  flex: 1 1 auto;
  min-width: 0;
}

.page-contact .ct-ch__label {
  margin: 0;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .ct-ch__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.2vw, 21px);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--bone);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.page-contact .ct-ch__value--plain {
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.02em;
}

.page-contact .ct-ch__desc {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--soft);
}

.page-contact .ct-ch__more {
  margin-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-contact .ct-ch__more summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0 4px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  cursor: pointer;
  list-style: none;
  transition: color 0.16s ease-out;
}

.page-contact .ct-ch__more summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-ch__more summary::marker {
  content: "";
}

.page-contact .ct-ch__more summary::before {
  content: "+";
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .ct-ch__more[open] summary::before {
  content: "−";
  border-color: var(--cyan);
}

.page-contact .ct-ch__more summary:hover {
  color: var(--bone);
}

.page-contact .ct-ch__more ul {
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
}

.page-contact .ct-ch__more li {
  position: relative;
  padding: 7px 0 7px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--soft);
}

.page-contact .ct-ch__more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .ct-channels__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-contact .ct-channels__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-contact .ct-channels__note {
  display: flex;
  gap: 10px;
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .ct-channels__note .status-dot {
  flex: 0 0 auto;
  margin-top: 6px;
}

/* ---------- 回复时限 ---------- */

.page-contact .ct-sla {
  padding: var(--ct-pad) 0;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-sla__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  align-items: start;
}

.page-contact .ct-sla__figure {
  border-left: 2px solid var(--lava);
  padding-left: 20px;
}

.page-contact .ct-sla__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(64px, 10vw, 118px);
  font-weight: 500;
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--lava);
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-sla__unit {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-contact .ct-sla__title {
  margin: 0 0 16px;
  font-size: clamp(21px, 2.8vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-contact .ct-sla__lede {
  margin: 0 0 24px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--soft);
}

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

.page-contact .ct-sla__rows li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-sla__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .ct-sla__val {
  font-size: 15px;
  line-height: 1.72;
  color: var(--soft);
}

/* ---------- 自查清单 ---------- */

.page-contact .ct-check {
  padding: var(--ct-pad) 0;
}

.page-contact .ct-check__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  align-items: start;
}

.page-contact .ct-check__desc {
  margin: 14px 0 22px;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-contact .ct-checklist li {
  display: flex;
  gap: 14px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-checklist input[type="checkbox"] {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 4px 0 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  transition: border-color 0.16s ease-out, background-color 0.16s ease-out;
}

.page-contact .ct-checklist input[type="checkbox"]:hover {
  border-color: var(--cyan);
}

.page-contact .ct-checklist input[type="checkbox"]:checked {
  border-color: var(--cyan);
  background: rgba(52, 231, 208, 0.12);
}

.page-contact .ct-checklist input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(40deg);
}

.page-contact .ct-checklist label {
  font-size: 15px;
  line-height: 1.75;
  color: var(--soft);
  cursor: pointer;
}

.page-contact .ct-checklist input[type="checkbox"]:checked + label {
  color: var(--mist);
}

/* ---------- 备案信息 ---------- */

.page-contact .ct-files {
  padding: 0 0 var(--ct-pad);
}

.page-contact .ct-files__panel {
  position: relative;
  padding: clamp(24px, 4vw, 52px);
  background: var(--shell);
  border: 1px solid var(--line);
}

.page-contact .ct-files__panel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(52, 231, 208, 0) 62%);
}

.page-contact .ct-files__list {
  margin: clamp(24px, 3.5vw, 40px) 0 0;
}

.page-contact .ct-files__list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-files__list dt {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-contact .ct-files__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bone);
}

.page-contact .ct-files__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 焦点与响应式 ---------- */

.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible,
.page-contact input:focus-visible,
.page-contact label:focus-visible {
  outline: 2px solid var(--lava);
  outline-offset: 2px;
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

@media (min-width: 640px) {
  .page-contact .ct-sla__rows li {
    grid-template-columns: minmax(0, 132px) minmax(0, 1fr);
    gap: 0 22px;
    align-items: baseline;
  }

  .page-contact .ct-sla__key {
    padding-top: 2px;
  }

  .page-contact .ct-files__list > div {
    grid-template-columns: minmax(0, 168px) minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(32px, 5vw, 80px);
  }

  .page-contact .ct-check__grid {
    grid-template-columns: minmax(0, 0.36fr) minmax(0, 0.64fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-contact .ct-sla__grid {
    grid-template-columns: minmax(0, 0.38fr) minmax(0, 0.62fr);
    gap: clamp(36px, 5vw, 76px);
  }
}

@media (min-width: 980px) {
  .page-contact .ct-channels__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-contact .ct-channels__aside {
    position: sticky;
    top: 32px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-ch,
  .page-contact .ct-ch__more summary,
  .page-contact .breadcrumbs a,
  .page-contact .ct-checklist input[type="checkbox"] {
    transition: none;
  }

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