.page-contact {
  --pc-gap: clamp(1.5rem, 4vw, 3rem);
  --pc-accent-line: var(--line-soft);
  background: var(--navy-950);
  color: var(--snow);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(1.75rem, 4vw, 2.75rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.16;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(circle at 78% 22%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 78% 22%, #000 0%, transparent 68%);
}

.page-contact .contact-hero .container {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero .breadcrumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  font-size: 13px;
}

.page-contact .contact-hero h1 {
  margin: 0.7rem 0 1.15rem;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.4vw, 4.3rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--snow);
}

.page-contact .contact-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 双栏工作区 ---------- */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  padding-top: clamp(2rem, 5vw, 3.25rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .contact-panel__title {
  margin: 0.5rem 0 0.75rem;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.22;
  color: var(--snow);
}

.page-contact .contact-panel__intro {
  max-width: 52ch;
  margin: 0 0 1.75rem;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 反馈类型切换 ---------- */
.page-contact .type-switch {
  position: relative;
}

.page-contact .type-switch__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .type-switch__labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-contact .type-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--navy-900);
  color: var(--mist);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  user-select: none;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .type-chip:hover {
  color: var(--snow);
  border-color: var(--mist);
}

.page-contact #ft-correction:checked ~ .type-switch__labels label[for="ft-correction"],
.page-contact #ft-version:checked ~ .type-switch__labels label[for="ft-version"],
.page-contact #ft-coop:checked ~ .type-switch__labels label[for="ft-coop"],
.page-contact #ft-other:checked ~ .type-switch__labels label[for="ft-other"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--navy-950);
}

.page-contact #ft-correction:focus-visible ~ .type-switch__labels label[for="ft-correction"],
.page-contact #ft-version:focus-visible ~ .type-switch__labels label[for="ft-version"],
.page-contact #ft-coop:focus-visible ~ .type-switch__labels label[for="ft-coop"],
.page-contact #ft-other:focus-visible ~ .type-switch__labels label[for="ft-other"] {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}

.page-contact .type-panels {
  margin-top: 1.75rem;
}

.page-contact .type-panel {
  display: none;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.page-contact #ft-correction:checked ~ .type-panels .type-panel[data-type="correction"],
.page-contact #ft-version:checked ~ .type-panels .type-panel[data-type="version"],
.page-contact #ft-coop:checked ~ .type-panels .type-panel[data-type="coop"],
.page-contact #ft-other:checked ~ .type-panels .type-panel[data-type="other"] {
  display: block;
  animation: pc-contact-fade 0.32s var(--ease) both;
}

@keyframes pc-contact-fade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-contact .type-panel h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--snow);
}

.page-contact .type-panel p {
  max-width: 58ch;
  margin: 0 0 1.15rem;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist);
}

.page-contact .prep-list__title {
  margin: 0 0 0.7rem !important;
  font-family: var(--font-mono);
  font-size: 11.5px !important;
  letter-spacing: 0.12em;
  color: var(--mint) !important;
}

.page-contact .prep-list {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .prep-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 14px;
  line-height: 1.7;
  color: var(--snow);
}

.page-contact .prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--mint);
}

/* ---------- 侧栏联系卡 ---------- */
.page-contact .contact-side {
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.page-contact .contact-card {
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--navy-800) 0%, var(--navy-900) 68%);
  padding: clamp(1.25rem, 3.2vw, 1.75rem);
  box-shadow: var(--shadow-panel);
}

.page-contact .contact-card__list {
  display: grid;
  gap: 1rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.page-contact .contact-card__row {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-card__row:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-card dt {
  margin-bottom: 0.3rem;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .contact-card dd {
  margin: 0;
  font-size: clamp(0.98rem, 2vw, 1.12rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
  overflow-wrap: anywhere;
}

.page-contact .contact-card dd.is-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-contact .contact-card__urgent {
  margin: 1.25rem 0 0;
  padding: 0.15rem 0 0.15rem 0.9rem;
  border-left: 2px solid var(--amber);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--snow);
}

.page-contact .side-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--line);
  color: var(--snow);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .side-link span {
  color: var(--amber);
  flex: none;
}

.page-contact .side-link:hover {
  border-color: var(--amber);
  background: var(--navy-800);
}

.page-contact .side-link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}

/* ---------- 通用区块 ---------- */
.page-contact .pc-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-section h2 {
  margin: 0.55rem 0 0;
  font-size: clamp(1.4rem, 3.4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--snow);
}

/* ---------- 渠道 ---------- */
.page-contact .channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-contact .channel-list {
  display: grid;
  gap: 0;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.4rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .channel-list__name {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .channel-list__value {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .channel-list__value strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
  overflow-wrap: anywhere;
}

.page-contact .channel-list__value strong.is-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--mint);
}

.page-contact .channels__figure,
.page-contact .ticket__figure {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--line);
  background: var(--navy-900);
}

.page-contact .channels__figure img,
.page-contact .ticket__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 工单步骤 ---------- */
.page-contact .ticket__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-contact .steps {
  counter-reset: step;
  margin: 1.75rem 0 0;
  padding: 0 0 0 1.35rem;
  list-style: none;
}

.page-contact .steps__item {
  position: relative;
  padding: 0 0 1.9rem 1.6rem;
  border-left: 1px solid var(--line);
}

.page-contact .steps__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .steps__item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: -1.15rem;
  top: -0.15rem;
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  border: 1px solid var(--line);
  background: var(--navy-900);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.page-contact .steps__item h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--snow);
}

.page-contact .steps__item p {
  max-width: 54ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 材料 ---------- */
.page-contact .materials__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-contact .material-card {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--line);
  background: var(--navy-900);
}

.page-contact .material-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.1rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--snow);
}

.page-contact .material-card h3::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--amber);
  flex: none;
}

.page-contact .material-card ul {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .material-card li {
  position: relative;
  padding-left: 1.3rem;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .material-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--mint-deep);
}

.page-contact .materials__note {
  max-width: 72ch;
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 回复与隐私 ---------- */
.page-contact .pc-section--response {
  background: var(--navy-900);
}

.page-contact .response__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-contact .response__grid p {
  max-width: 60ch;
  margin: 1rem 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .response__links {
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.page-contact .link-card {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .link-card:hover {
  border-color: var(--mint);
  background: var(--navy-800);
}

.page-contact .link-card:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}

.page-contact .link-card__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mint);
}

.page-contact .link-card__title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--snow);
}

.page-contact .response__privacy {
  margin: 1.75rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 40rem) {
  .page-contact .channel-list li {
    grid-template-columns: 10.5rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: baseline;
  }

  .page-contact .materials__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 60rem) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4.5vw, 4rem);
  }

  .page-contact .contact-side {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-contact .channels__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .ticket__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-contact .ticket__figure {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-contact .response__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .type-panel,
  .page-contact .type-chip,
  .page-contact .side-link,
  .page-contact .link-card {
    transition: none;
    animation: none;
  }
}
<<<END>>>