.page-contact {
  --contact-gap: clamp(28px, 5vw, 72px);
  --contact-cell-x: clamp(18px, 2vw, 26px);
  display: block;
}

/* 面包屑定位 */
.page-contact > .crumb {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 34px) var(--gut) 0;
}

/* 首屏：分屏叙事 + 视觉 */
.page-contact .contact-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(44px, 7vw, 96px);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}

.page-contact .contact-hero__copy {
  max-width: 40em;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 20px;
  font-size: clamp(38px, 8vw, 64px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.04;
  color: var(--paper);
}

.page-contact .contact-quick {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--edge);
}

.page-contact .contact-quick li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--edge);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .contact-quick .num {
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-contact .contact-hero__visual {
  margin: 0;
}

.page-contact .contact-hero__visual .frame {
  aspect-ratio: 4 / 3;
  padding-top: 0;
}

.page-contact .frame__caption {
  font-family: var(--mono);
}

/* 渠道对照：三列竖排题签 */
.page-contact .contact-channels {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-contact .contact-channels__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .contact-channels h2,
.page-contact .contact-kit h2,
.page-contact .contact-compare h2,
.page-contact .contact-arrive h2 {
  margin: 12px 0 16px;
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
}

.page-contact .channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--edge);
}

.page-contact .channel {
  position: relative;
  padding: 28px 52px 30px var(--contact-cell-x);
  border-bottom: 1px solid var(--edge);
  display: grid;
  align-content: start;
  gap: 12px;
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 200ms ease;
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  background-color: var(--indigo-2);
}

.page-contact .channel:hover::before,
.page-contact .channel:focus-within::before {
  transform: scaleX(1);
}

.page-contact .channel__spine {
  position: absolute;
  top: 28px;
  right: 16px;
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mute);
}

.page-contact .channel__id {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-contact .channel__name {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .channel__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .channel__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.page-contact .channel__list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

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

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--edge);
}

.page-contact .channel__foot {
  margin: 8px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--edge);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mute);
}

/* 材料清单：窄数据带 */
.page-contact .contact-kit.band {
  padding-block: clamp(32px, 5vw, 56px);
}

.page-contact .contact-kit__head {
  max-width: 52ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .kitlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .kitlist li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px dashed var(--edge);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-contact .kitlist strong {
  color: var(--paper);
  font-weight: 800;
}

.page-contact .kitlist__box {
  position: relative;
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--orange);
}

.page-contact .kitlist__box::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--orange-2);
}

.page-contact .contact-kit__note {
  margin: 22px 0 0;
  max-width: 68ch;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--mute);
}

.page-contact .contact-kit__note a,
.page-contact .contact-compare__link a,
.page-contact .arrive-side__text a {
  color: var(--orange-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 价格比较咨询写法 */
.page-contact .contact-compare {
  padding: clamp(44px, 7vw, 96px) 0;
}

.page-contact .contact-compare__head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--edge);
}

.page-contact .step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--edge);
}

.page-contact .step__id {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-contact .step__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .step__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.page-contact .step__note {
  grid-column: 2;
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--mute);
}

.page-contact .contact-compare__link {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

/* 地址与备案收尾 */
.page-contact .contact-arrive {
  padding: 0 0 clamp(64px, 9vw, 128px);
}

.page-contact .contact-arrive .frame--band {
  margin-bottom: clamp(32px, 5vw, 64px);
}

.page-contact .arrive-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-contact .arrive-address {
  margin: 0;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-arrive__note {
  margin: 22px 0 0;
  max-width: 46ch;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-size: 13px;
  line-height: 1.9;
  color: var(--mute);
}

.page-contact .arrive-side {
  align-self: start;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--edge);
  background-color: var(--indigo-2);
}

.page-contact .arrive-side__label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

.page-contact .arrive-icp {
  margin: 0 0 18px;
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-contact .arrive-side__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--mute);
}

/* 桌面布局 */
@media (min-width: 760px) {
  .page-contact .contact-quick {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .kitlist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 60px);
  }

  .page-contact .step {
    grid-template-columns: 56px minmax(0, 1.1fr) minmax(0, 0.85fr);
    align-items: baseline;
    gap: 0 24px;
  }

  .page-contact .step__note {
    grid-column: 3;
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 6vw, 88px);
  }

  .page-contact .channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid var(--edge);
  }

  .page-contact .channel {
    border-bottom: 0;
    border-left: 1px solid var(--edge);
    min-height: 340px;
  }

  .page-contact .channel:first-child {
    border-left: 0;
  }

  .page-contact .arrive-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: clamp(36px, 5vw, 80px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel::before {
    transition: none;
  }
}
<<<END>>>