.page-contact {
  --ac-rail-w: 296px;
  --ac-gap: 32px;
  background: var(--ink-900);
  color: var(--white);
  overflow-x: clip;
}

/* ===== 页面抬头 ===== */
.page-contact .contact-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(40px, 6vw, 76px));
  padding-bottom: clamp(32px, 4.5vw, 56px);
  background:
    radial-gradient(880px 440px at 86% -18%, rgba(36, 224, 210, .16), transparent 64%),
    radial-gradient(640px 340px at 2% 108%, rgba(255, 138, 43, .10), transparent 66%),
    linear-gradient(180deg, var(--ink-850) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--ink-700);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(44, 58, 85, .32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 58, 85, .32) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(680px 380px at 82% 6%, #000 0%, transparent 76%);
  mask-image: radial-gradient(680px 380px at 82% 6%, #000 0%, transparent 76%);
  pointer-events: none;
}

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

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: 20px;
}

.page-contact .contact-hero .breadcrumbs__link,
.page-contact .contact-hero .breadcrumbs__sep {
  color: var(--muted);
}

.page-contact .contact-hero .breadcrumbs__current {
  color: var(--cyan);
}

.page-contact .contact-hero .breadcrumbs__link:hover {
  color: var(--cyan-soft);
}

.page-contact .eyebrow {
  color: var(--cyan);
}

.page-contact .contact-hero h1 {
  font-family: var(--font-title);
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: .01em;
  margin: 14px 0 18px;
  max-width: 20ch;
  color: var(--white);
}

.page-contact .contact-hero .lead {
  max-width: 62ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-contact .hero-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15, 22, 38, .78);
  font-size: 14px;
}

.page-contact .hero-chip__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .hero-chip__v {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--white);
  word-break: break-all;
}

/* ===== 主体双栏 ===== */
.page-contact .contact-shell {
  display: grid;
  gap: var(--ac-gap);
  padding-block: clamp(36px, 5.5vw, 72px) clamp(40px, 6vw, 88px);
}

@media (min-width: 1040px) {
  .page-contact .contact-shell {
    grid-template-columns: var(--ac-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    padding-block: clamp(48px, 6vw, 84px) clamp(56px, 7vw, 104px);
    align-items: start;
  }
}

.page-contact .contact-rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

@media (min-width: 1040px) and (min-height: 800px) {
  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

.page-contact .rail-media {
  margin: 0;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-contact .rail-media__frame {
  aspect-ratio: 3 / 4;
  overflow: hidden;
}

.page-contact .rail-media__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}

.page-contact .channel-card {
  position: relative;
  padding: 18px 18px 20px 22px;
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-850) 100%);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--cyan);
}

.page-contact .channel-card--tel::before {
  background: var(--orange);
}

.page-contact .channel-card--addr::before {
  background: var(--cyan-soft);
}

.page-contact .channel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .channel-card--tel .channel-label {
  color: var(--orange);
}

.page-contact .channel-card--addr .channel-label {
  color: var(--cyan-soft);
}

.page-contact .channel-value {
  display: block;
  margin: 10px 0 12px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
  letter-spacing: .02em;
  color: var(--white);
  background: var(--ink-900);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  word-break: break-word;
  overflow-wrap: anywhere;
  user-select: all;
}

.page-contact .channel-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ===== 主内容区 ===== */
.page-contact .contact-main {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 6vw, 88px);
  min-width: 0;
}

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

.page-contact .contact-block__head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .contact-block__head h2 {
  font-family: var(--font-title);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.24;
  color: var(--white);
  margin: 12px 0;
}

.page-contact .contact-block__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

/* ===== 主题选择器 ===== */
.page-contact .topic-switch {
  position: relative;
}

.page-contact .topic-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-contact .topic-switch__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 20px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--ink-700);
}

.page-contact .topic-tab {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  line-height: 1.4;
  font-weight: 500;
  color: var(--muted);
  background: var(--ink-850);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  cursor: pointer;
  user-select: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-contact .topic-tab:hover {
  color: var(--cyan-soft);
  border-color: var(--cyan);
}

.page-contact #ct-data:checked ~ .topic-switch__tabs label[for="ct-data"],
.page-contact #ct-plan:checked ~ .topic-switch__tabs label[for="ct-plan"],
.page-contact #ct-live:checked ~ .topic-switch__tabs label[for="ct-live"],
.page-contact #ct-review:checked ~ .topic-switch__tabs label[for="ct-review"],
.page-contact #ct-cocreate:checked ~ .topic-switch__tabs label[for="ct-cocreate"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}

.page-contact .topic-switch:has(#ct-data:focus-visible) label[for="ct-data"],
.page-contact .topic-switch:has(#ct-plan:focus-visible) label[for="ct-plan"],
.page-contact .topic-switch:has(#ct-live:focus-visible) label[for="ct-live"],
.page-contact .topic-switch:has(#ct-review:focus-visible) label[for="ct-review"],
.page-contact .topic-switch:has(#ct-cocreate:focus-visible) label[for="ct-cocreate"] {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 2px;
}

.page-contact .topic-switch__panels {
  min-height: 220px;
}

.page-contact .topic-panel {
  display: none;
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-850) 100%);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  animation: contact-topic-fade 220ms var(--ease);
}

@keyframes contact-topic-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.page-contact #ct-data:checked ~ .topic-switch__panels > .topic-panel:nth-child(1),
.page-contact #ct-plan:checked ~ .topic-switch__panels > .topic-panel:nth-child(2),
.page-contact #ct-live:checked ~ .topic-switch__panels > .topic-panel:nth-child(3),
.page-contact #ct-review:checked ~ .topic-switch__panels > .topic-panel:nth-child(4),
.page-contact #ct-cocreate:checked ~ .topic-switch__panels > .topic-panel:nth-child(5) {
  display: block;
}

.page-contact .topic-panel__lead {
  margin: 0;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--white);
}

.page-contact .topic-panel__meta {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--ink-700);
}

.page-contact .topic-panel__meta dt {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .topic-panel__meta dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 560px) {
  .page-contact .topic-panel__meta > div {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
  .page-contact .topic-panel__meta dt {
    margin-bottom: 0;
  }
}

/* ===== 处理流程 ===== */
.page-contact .flow-axis {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-contact .flow-step {
  position: relative;
  padding-top: 18px;
  min-width: 0;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan-soft) 55%, var(--ink-700) 100%);
}

.page-contact .flow-step__index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-contact .flow-step__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

@media (min-width: 880px) {
  .page-contact .flow-axis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }
}

.page-contact .sla-strip {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 28px);
  background:
    linear-gradient(120deg, rgba(36, 224, 210, .10), transparent 58%),
    var(--ink-850);
  border: 1px solid var(--ink-700);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
}

.page-contact .sla-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-contact .sla-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-contact .sla-item:nth-child(2) .sla-value {
  color: var(--orange);
}

.page-contact .sla-label {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--muted);
}

.page-contact .sla-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--ink-700);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-contact .sla-strip {
    grid-template-columns: auto auto minmax(0, 1fr);
    align-items: center;
    gap: 34px;
  }
  .page-contact .sla-item {
    padding-right: 34px;
    border-right: 1px solid var(--ink-700);
  }
  .page-contact .sla-note {
    padding-top: 0;
    border-top: 0;
  }
}

/* ===== 服务地区与备案 ===== */
.page-contact .contact-region {
  background-color: var(--paper);
  background-image: linear-gradient(90deg, var(--cyan) 0 25%, var(--orange) 25% 50%, var(--red) 50% 75%, var(--ink-900) 75% 100%);
  background-repeat: no-repeat;
  background-size: 100% 4px;
  background-position: top left;
  color: var(--paper-ink);
  padding-block: clamp(48px, 6vw, 84px);
}

.page-contact .region-grid {
  display: grid;
  gap: 28px;
}

@media (min-width: 940px) {
  .page-contact .region-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: center;
  }
}

.page-contact .eyebrow--ink {
  color: rgba(22, 32, 47, .64);
}

.page-contact .region-text h2 {
  font-family: var(--font-title);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.24;
  color: var(--paper-ink);
  margin: 12px 0 14px;
}

.page-contact .region-lead {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--line);
}

.page-contact .region-facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid rgba(22, 32, 47, .18);
}

.page-contact .region-fact {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(22, 32, 47, .18);
}

@media (min-width: 560px) {
  .page-contact .region-fact {
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

.page-contact .region-fact dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(22, 32, 47, .62);
}

.page-contact .region-fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper-ink);
  overflow-wrap: anywhere;
}

.page-contact .region-fact__mono {
  font-family: var(--font-mono);
  letter-spacing: .03em;
}

.page-contact .region-map {
  margin: 0;
}

.page-contact .region-map__frame {
  position: relative;
  aspect-ratio: 1300 / 620;
  border: 1px solid rgba(22, 32, 47, .24);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-900);
}

.page-contact .region-map__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .region-map__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: rgba(22, 32, 47, .62);
}

/* ===== 内容合作 ===== */
.page-contact .contact-block--cocreate {
  padding-block: clamp(48px, 6vw, 88px);
}

.page-contact .cocreate-grid {
  display: grid;
  gap: 18px;
}

@media (min-width: 720px) {
  .page-contact .cocreate-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-contact .cocreate-item {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--ink-850);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius);
  min-width: 0;
}

.page-contact .cocreate-item__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-contact .cocreate-item h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-contact .cocreate-item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .cocreate-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

/* ===== 底部信息条 ===== */
.page-contact .contact-band {
  background: var(--ink-850);
  border-top: 1px solid var(--ink-700);
  border-bottom: 1px solid var(--ink-700);
  padding-block: 22px;
}

.page-contact .contact-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.page-contact .contact-band__label {
  position: relative;
  margin: 0;
  padding-left: 14px;
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-contact .contact-band__label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translateY(-50%);
  background: var(--red);
  border-radius: 50%;
}

.page-contact .contact-band__line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.page-contact .contact-band__line span[aria-hidden="true"] {
  color: var(--line);
}

/* ===== 动效降级 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}
<<<END>>>