.page-contact {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  overflow-x: hidden;
}

.page-contact [id] {
  scroll-margin-top: 92px;
}

.page-contact .ct-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 14px 0 14px;
}

/* 面包屑 */
.page-contact .ct-crumb {
  border-bottom: 1px solid rgba(14, 17, 22, 0.16);
}

.page-contact .ct-crumb__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .ct-crumb__inner a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-contact .ct-crumb__current {
  color: var(--ink);
}

/* 首屏 */
.page-contact .ct-hero {
  padding-block: clamp(34px, 6vw, 76px) clamp(28px, 4vw, 54px);
}

.page-contact .ct-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-contact .ct-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
}

.page-contact .ct-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(16px, 1.3vw, 18px);
}

.page-contact .ct-quick {
  background: var(--ink);
  color: var(--paper);
  border: var(--line);
  box-shadow: var(--shadow);
  padding: clamp(22px, 3vw, 32px);
}

.page-contact .ct-quick__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--flag-yellow);
}

.page-contact .ct-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .ct-quick__list li {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-block: 12px;
  border-top: 1px solid rgba(246, 243, 236, 0.22);
}

.page-contact .ct-quick__list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .ct-quick__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--footer-soft);
}

.page-contact .ct-quick__v {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* 三条通道 */
.page-contact .ct-channels {
  padding-block: clamp(34px, 5vw, 70px);
}

.page-contact .ct-channels__head {
  max-width: 44em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-contact .ct-channels__lead {
  margin: 0;
  max-width: 34em;
  font-size: 16.5px;
}

.page-contact .ct-channels__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-contact .ct-channels__cards {
  display: grid;
  gap: 22px;
}

.page-contact .ct-channel {
  background: var(--cloud);
  border: var(--line);
  box-shadow: var(--shadow-sm);
  padding: clamp(20px, 2.6vw, 28px);
}

.page-contact .ct-channel__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lake);
}

.page-contact .ct-channel__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.25;
  margin: 0 0 10px;
}

.page-contact .ct-channel__body {
  margin: 0 0 14px;
  font-size: 15.5px;
}

.page-contact .ct-channel__val {
  display: block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  background: var(--archive);
  border-left: 4px solid var(--ochre);
  padding: 8px 12px;
  overflow-wrap: anywhere;
}

.page-contact .ct-channel__link {
  display: inline-block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ochre);
  text-decoration: none;
  border-bottom: 2px solid var(--ochre);
  padding-bottom: 2px;
}

.page-contact .ct-channel__link:hover,
.page-contact .ct-channel__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-contact .ct-channels__figure {
  margin: 0;
}

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

/* 写法建议 */
.page-contact .ct-write {
  background: var(--archive);
  border-block: var(--line);
  padding-block: clamp(36px, 5vw, 68px);
}

.page-contact .ct-write__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-contact .ct-write__lead {
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 32em;
  font-size: 16.5px;
}

.page-contact .ct-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .ct-facts li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  border-top: 1px solid rgba(14, 17, 22, 0.18);
  padding-top: 16px;
}

.page-contact .ct-facts li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .ct-facts__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lake);
  padding-top: 2px;
}

.page-contact .ct-facts__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 0 0 4px;
}

.page-contact .ct-facts li p {
  margin: 0;
  font-size: 15.5px;
}

.page-contact .ct-picker__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--deep);
}

.page-contact .ct-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .ct-picker input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  border: 0;
  white-space: nowrap;
}

.page-contact .ct-picker label {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--cloud);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 9px 16px;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-contact .ct-picker label:hover {
  background: var(--deep);
  color: var(--paper);
}

.page-contact .ct-picker input:checked + label {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 4px 4px 0 var(--ochre);
}

.page-contact .ct-picker input:focus-visible + label {
  outline: 2px solid var(--lake);
  outline-offset: 3px;
}

.page-contact .ct-picker__samples {
  flex: 0 0 100%;
  margin-top: 10px;
}

.page-contact .ct-sample {
  display: none;
  background: var(--cloud);
  border: var(--line);
  box-shadow: var(--shadow-sm);
  padding: 20px 22px;
}

.page-contact .ct-sample p {
  margin: 0 0 10px;
  font-size: 15.5px;
  overflow-wrap: anywhere;
}

.page-contact .ct-sample p:last-child {
  margin-bottom: 0;
}

.page-contact .ct-sample__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lake);
}

.page-contact #ct-cat-a:checked ~ .ct-picker__samples .ct-sample[data-for="a"],
.page-contact #ct-cat-b:checked ~ .ct-picker__samples .ct-sample[data-for="b"],
.page-contact #ct-cat-c:checked ~ .ct-picker__samples .ct-sample[data-for="c"],
.page-contact #ct-cat-d:checked ~ .ct-picker__samples .ct-sample[data-for="d"] {
  display: block;
}

/* 升级对接 */
.page-contact .ct-upgrade {
  background: var(--ochre);
  color: var(--paper);
  border-block: var(--line);
  padding-block: clamp(38px, 5.5vw, 74px);
}

.page-contact .ct-upgrade__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-contact .ct-upgrade__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper);
  opacity: 0.82;
}

.page-contact .ct-upgrade__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--paper);
}

.page-contact .ct-upgrade__lead {
  margin: 0 0 20px;
  max-width: 30em;
  font-size: 16.5px;
  color: var(--paper);
}

.page-contact .ct-upgrade__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 2px solid var(--paper);
  padding-bottom: 3px;
}

.page-contact .ct-upgrade__link:hover,
.page-contact .ct-upgrade__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.page-contact .ct-steps {
  border-top: 2px solid rgba(246, 243, 236, 0.55);
}

.page-contact .ct-step {
  border-bottom: 2px solid rgba(246, 243, 236, 0.55);
}

.page-contact .ct-step summary {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding-block: 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 18.5px;
  font-weight: 700;
  color: var(--paper);
}

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

.page-contact .ct-step summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 15px;
  opacity: 0.85;
}

.page-contact .ct-step[open] summary::after {
  content: "－";
}

.page-contact .ct-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  opacity: 0.8;
}

.page-contact .ct-step__body {
  padding: 0 0 20px 54px;
  font-size: 15.5px;
}

.page-contact .ct-step__body p {
  margin: 0 0 10px;
  max-width: 36em;
}

.page-contact .ct-step__need {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  padding: 10px 12px;
  border-left: 3px solid var(--paper);
  background: rgba(14, 17, 22, 0.14);
}

/* 回应节奏 */
.page-contact .ct-response {
  padding-block: clamp(34px, 5vw, 64px);
}

.page-contact .ct-response__head {
  max-width: 42em;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .ct-response__lead {
  margin: 0;
  max-width: 34em;
  font-size: 16.5px;
}

.page-contact .ct-response__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: var(--line);
  background: var(--cloud);
}

.page-contact .ct-response__stat {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  border-top: 1px solid rgba(14, 17, 22, 0.16);
}

.page-contact .ct-response__stat:first-child {
  border-top: 0;
}

.page-contact .ct-response__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1.2;
  color: var(--deep);
}

.page-contact .ct-response__cap {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-contact .ct-response__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 40em;
  font-size: 15.5px;
  color: var(--deep);
}

/* 地址与备案 */
.page-contact .ct-info {
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(32px, 4.5vw, 58px);
}

.page-contact .ct-info__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 24px);
  margin: 0 0 20px;
  color: var(--paper);
}

.page-contact .ct-info__bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid rgba(246, 243, 236, 0.3);
}

.page-contact .ct-info__item {
  display: grid;
  gap: 4px;
  padding-block: 14px;
  border-bottom: 1px solid rgba(246, 243, 236, 0.3);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
}

.page-contact .ct-info__k {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--footer-soft);
}

.page-contact .ct-info__v {
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .ct-info__note {
  margin: 22px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(246, 243, 236, 0.86);
}

.page-contact .ct-info__link {
  color: var(--paper);
  border-bottom: 1px solid var(--paper);
  text-decoration: none;
}

.page-contact .ct-info__link:hover,
.page-contact .ct-info__link:focus-visible {
  color: var(--flag-yellow);
  border-bottom-color: var(--flag-yellow);
}

/* 底部行动带 */
.page-contact .ct-cta {
  position: relative;
  overflow: hidden;
  background: var(--ochre);
  color: var(--paper);
  border-top: var(--line);
}

.page-contact .ct-cta__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  z-index: 0;
}

.page-contact .ct-cta__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(42px, 6vw, 86px);
}

.page-contact .ct-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--paper);
}

.page-contact .ct-cta__text {
  margin: 0 0 clamp(22px, 3vw, 30px);
  max-width: 34em;
  font-size: 16.5px;
  color: var(--paper);
}

.page-contact .ct-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-contact .ct-cta .btn {
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.page-contact .ct-cta .btn:hover,
.page-contact .ct-cta .btn:focus-visible {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 4px 4px 0 var(--paper);
}

.page-contact .ct-cta__quiet {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--paper);
  padding-bottom: 2px;
}

.page-contact .ct-cta__quiet:hover,
.page-contact .ct-cta__quiet:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* 中等宽度 */
@media (min-width: 720px) {
  .page-contact .ct-channel:nth-child(2) {
    margin-inline-start: 32px;
  }

  .page-contact .ct-channel:nth-child(3) {
    margin-inline-start: 16px;
  }
}

@media (min-width: 760px) {
  .page-contact .ct-response__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-response__stat:nth-child(2) {
    border-top: 0;
    border-left: 1px solid rgba(14, 17, 22, 0.16);
  }

  .page-contact .ct-response__stat:nth-child(3) {
    border-left: 0;
  }

  .page-contact .ct-response__stat:nth-child(4) {
    border-left: 1px solid rgba(14, 17, 22, 0.16);
  }
}

@media (min-width: 900px) {
  .page-contact .ct-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-contact .ct-quick {
    margin-bottom: 6px;
  }

  .page-contact .ct-info__bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid rgba(246, 243, 236, 0.3);
  }

  .page-contact .ct-info__item {
    border-bottom: 0;
    border-left: 1px solid rgba(246, 243, 236, 0.3);
    padding: 4px 18px 4px 20px;
  }

  .page-contact .ct-info__item:first-child {
    border-left: 0;
    padding-left: 0;
  }
}

@media (min-width: 960px) {
  .page-contact .ct-channels__layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }

  .page-contact .ct-channels__figure {
    position: sticky;
    top: 96px;
  }

  .page-contact .ct-write__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-contact .ct-upgrade__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 1080px) {
  .page-contact .ct-response__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .ct-response__stat {
    border-top: 0;
    border-left: 1px solid rgba(14, 17, 22, 0.16);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-picker label,
  .page-contact .ct-channel__link,
  .page-contact .ct-upgrade__link {
    transition: none;
  }
}
<<<END>>>