.page-contact {
  --pc-rule: rgba(0, 229, 255, .18);
  --pc-rule-soft: rgba(167, 176, 192, .16);
  --pc-panel: rgba(18, 32, 46, .72);
  --pc-glow: 0 24px 60px -34px rgba(0, 229, 255, .55);
  padding-bottom: clamp(40px, 7vw, 96px);
  background:
    radial-gradient(1100px 460px at 92% -12%, rgba(108, 92, 231, .22), transparent 62%),
    radial-gradient(820px 420px at -6% 16%, rgba(0, 229, 255, .10), transparent 62%),
    var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-contact h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.16;
  letter-spacing: -.025em;
  color: var(--white);
}

.page-contact h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, .38);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--haze);
}

.page-contact .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  color: rgba(167, 176, 192, .5);
}

.page-contact .breadcrumb a {
  color: var(--haze);
  border-bottom-color: transparent;
}

.page-contact .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--cyan);
}

/* ---------- 首屏分屏 ---------- */

.contact-hero {
  padding-top: clamp(20px, 4vw, 52px);
}

.contact-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.contact-hero__lead {
  min-width: 0;
}

.contact-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 6vw, 58px);
  line-height: 1.06;
  letter-spacing: -.035em;
  color: var(--white);
  max-width: 22ch;
}

.contact-hero__intro {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.contact-hero__media {
  margin: clamp(20px, 3vw, 30px) 0 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--pc-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: var(--pc-glow);
}

.contact-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 联系信息面板 ---------- */

.contact-board {
  margin-top: clamp(22px, 3vw, 32px);
  border: 1px solid var(--pc-rule);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(18, 32, 46, .92), rgba(12, 20, 36, .92));
  overflow: hidden;
  position: relative;
}

.contact-board::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(56, 242, 196, .5) 55%, transparent);
}

.contact-board__row {
  display: grid;
  gap: 6px;
  padding: 15px clamp(14px, 2.4vw, 22px);
  border-top: 1px solid var(--pc-rule-soft);
}

.contact-board__row:first-child {
  border-top: 0;
}

.contact-board__key {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--haze);
}

.contact-board__val {
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.5;
  color: var(--white);
  overflow-wrap: anywhere;
}

.contact-board__val--mono {
  font-family: var(--font-mono);
  font-size: clamp(15px, 4.2vw, 26px);
  font-weight: 500;
  letter-spacing: -.015em;
  line-height: 1.3;
  color: var(--cyan);
}

/* ---------- 侧栏：准备清单 ---------- */

.contact-hero__side {
  min-width: 0;
  display: grid;
  gap: 16px;
  border: 1px solid var(--pc-rule);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 30px);
  background: linear-gradient(180deg, rgba(12, 20, 36, .96), rgba(18, 32, 46, .88));
  position: relative;
}

.contact-hero__side::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 74px;
  height: 74px;
  background: linear-gradient(225deg, rgba(0, 229, 255, .22), transparent 70%);
  pointer-events: none;
}

.prep {
  min-width: 0;
}

.prep__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 27px);
  letter-spacing: -.02em;
  color: var(--white);
}

.prep__steps {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.prep__steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.prep__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.prep__note {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--mint);
  background: rgba(56, 242, 196, .07);
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.prep__media {
  margin: 18px 0 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--pc-rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}

.prep__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 咨询类型切换 ---------- */

.ask-switch {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 6px;
  padding-top: 20px;
  border-top: 1px solid var(--pc-rule-soft);
}

.ask-switch__hint {
  grid-column: 1 / -1;
  margin: 0 0 4px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--haze);
}

.ask-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;
}

.ask-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 8px;
  border: 1px solid var(--pc-rule-soft);
  border-radius: 2px;
  background: rgba(7, 11, 18, .55);
  color: var(--haze);
  font-size: 14px;
  letter-spacing: .02em;
  text-align: center;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.ask-chip:hover {
  color: var(--white);
  border-color: var(--pc-rule);
}

.ask-switch__input:checked + .ask-chip {
  color: var(--ink);
  font-weight: 700;
  border-color: transparent;
  background: linear-gradient(120deg, var(--cyan), var(--mint));
}

.ask-switch__input:focus-visible + .ask-chip {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.ask-switch__panels {
  grid-column: 1 / -1;
  margin-top: 8px;
}

.ask-panel {
  display: none;
  padding: 16px;
  border: 1px dashed var(--pc-rule);
  border-radius: 2px;
  background: rgba(7, 11, 18, .55);
}

#ask-correct:checked ~ .ask-switch__panels .ask-panel--correct,
#ask-use:checked ~ .ask-switch__panels .ask-panel--use,
#ask-partner:checked ~ .ask-switch__panels .ask-panel--partner,
#ask-data:checked ~ .ask-switch__panels .ask-panel--data {
  display: block;
}

.ask-panel p {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

.ask-panel ul {
  display: grid;
  gap: 6px;
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--haze);
}

.ask-panel li::marker {
  color: var(--cyan);
}

.ask-panel p.ask-panel__channel {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mint);
}

/* ---------- 章节通用 ---------- */

.page-contact .section {
  padding-top: clamp(48px, 8vw, 100px);
}

.sec-head {
  max-width: 64ch;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.sec-head__desc {
  margin: 14px 0 0;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 四类场景 ---------- */

.scene-grid {
  display: grid;
  gap: 14px;
}

.scene {
  --scene-offset: 0px;
  position: relative;
  min-width: 0;
  padding: 20px 18px 22px;
  border: 1px solid var(--pc-rule-soft);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(18, 32, 46, .88), rgba(12, 20, 36, .92));
  transform: translateY(var(--scene-offset));
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.scene::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(108, 92, 231, .6) 60%, transparent);
}

.scene:hover {
  border-color: var(--cyan);
  box-shadow: var(--pc-glow);
  transform: translateY(calc(var(--scene-offset) - 4px));
}

.scene__no {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--flame);
}

.scene__body {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--haze);
}

.scene__ready {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--pc-rule-soft);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text);
}

.scene__ready .mono {
  display: inline-block;
  margin-right: 8px;
  color: var(--mint);
  font-size: 11px;
  letter-spacing: .14em;
}

/* ---------- 响应节奏 ---------- */

.response-band {
  border: 1px solid var(--pc-rule);
  border-radius: var(--radius);
  padding: clamp(20px, 3.4vw, 40px);
  background:
    linear-gradient(120deg, rgba(108, 92, 231, .16), transparent 46%),
    linear-gradient(180deg, rgba(12, 20, 36, .94), rgba(7, 11, 18, .94));
}

.response-band__desc {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
}

.flow {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.flow__step {
  position: relative;
  min-width: 0;
  padding: 16px 16px 18px 20px;
  border: 1px solid var(--pc-rule-soft);
  border-radius: 2px;
  background: rgba(7, 11, 18, .6);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.flow__step:hover {
  border-color: var(--cyan);
  background: rgba(18, 32, 46, .8);
}

.flow__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mint);
}

.flow__step h3 {
  font-size: 16px;
}

.flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--haze);
}

/* ---------- 合作与服务对象 ---------- */

.who-grid {
  display: grid;
  gap: 12px;
}

.who {
  min-width: 0;
  padding: 18px 18px 20px;
  border: 1px solid var(--pc-rule-soft);
  border-left: 2px solid rgba(0, 229, 255, .45);
  border-radius: 2px;
  background: rgba(18, 32, 46, .5);
  transition: border-left-color .2s var(--ease), background .2s var(--ease);
}

.who:hover {
  border-left-color: var(--flame);
  background: rgba(18, 32, 46, .82);
}

.who h3 {
  font-size: 17px;
}

.who p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--haze);
}

.partners__more {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 地址与备案 ---------- */

.registry__title {
  margin-bottom: clamp(16px, 2.4vw, 24px);
  font-size: clamp(20px, 2.6vw, 26px);
}

.registry {
  display: grid;
  gap: 1px;
  border: 1px solid var(--pc-rule-soft);
  border-radius: var(--radius);
  background: var(--pc-rule-soft);
  overflow: hidden;
}

.registry__cell {
  padding: 16px 18px;
  background: rgba(7, 11, 18, .9);
}

.registry__key {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--haze);
}

.registry__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--white);
  overflow-wrap: anywhere;
}

.registry__val--mono {
  font-family: var(--font-mono);
  letter-spacing: -.01em;
  color: var(--cyan);
}

.registry__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 窄屏到桌面 ---------- */

@media (min-width: 560px) {
  .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .who-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .registry {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .ask-switch {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .contact-board__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 960px) {
  .contact-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    gap: clamp(30px, 4.4vw, 64px);
  }

  .contact-hero__side {
    position: sticky;
    top: calc(var(--topbar-h) + 20px);
  }

  .response-band {
    display: grid;
    grid-template-columns: minmax(0, .74fr) minmax(0, 1.26fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .flow {
    margin-top: 0;
  }
}

@media (min-width: 1080px) {
  .scene-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px 20px;
    padding-bottom: 30px;
  }

  .scene:nth-child(even) {
    --scene-offset: 26px;
  }

  .who-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .registry {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .scene,
  .page-contact .scene:hover,
  .page-contact .flow__step,
  .page-contact .who,
  .page-contact .ask-chip {
    transform: none;
    transition: none;
  }
}
<<<END>>>