.page-contact {
  --contact-invert-line: #C6D2DE;
  --contact-invert-soft: #4A5B6C;
  --contact-invert-body: #33414F;
  background: var(--ink-900);
  color: var(--mist-100);
  font-family: var(--font-body);
}

/* 首屏 */
.page-contact .contact-head {
  padding-block: 24px 40px;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .contact-head .crumbs {
  margin-block-end: 26px;
}

.page-contact .contact-head__inner {
  display: grid;
  gap: 14px;
}

.page-contact .contact-title {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.04;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-contact .contact-lede {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-contact .jump-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .jump-list a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 12px;
  border: 1px solid var(--line-700);
  color: var(--mist-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .jump-list a:hover,
.page-contact .jump-list a:focus-visible {
  color: var(--ink-900);
  background: var(--lime-400);
  border-color: var(--lime-400);
}

/* 主体两栏 */
.page-contact .contact-body {
  display: grid;
  gap: 40px;
  padding-block: 40px 56px;
}

/* 纸白联系面板 */
.page-contact .direct {
  background: var(--paper-050);
  color: var(--ink-900);
  border-top: 3px solid var(--lime-400);
}

.page-contact .direct__figure {
  margin: 0;
  background: #DDE5EE;
  border-bottom: 1px solid var(--contact-invert-line);
}

.page-contact .direct__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .direct__inner {
  padding: 20px 20px 24px;
}

.page-contact .direct__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--contact-invert-soft);
}

.page-contact .direct__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-contact .direct__note {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--contact-invert-body);
}

.page-contact .channels {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--contact-invert-line);
}

.page-contact .channel {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--contact-invert-line);
}

.page-contact .channel__num {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--contact-invert-soft);
}

.page-contact .channel__main {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-contact .channel__kind {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--contact-invert-soft);
}

.page-contact .channel__value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .channel__use {
  font-size: 13px;
  line-height: 1.6;
  color: var(--contact-invert-body);
}

.page-contact .direct__foot {
  margin: 16px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--blue-500);
  font-size: 12px;
  line-height: 1.65;
  color: var(--contact-invert-soft);
}

/* 右侧纵向说明 */
.page-contact .flow-col {
  display: grid;
  gap: 44px;
  min-width: 0;
}

.page-contact .flow-block__head {
  display: grid;
  gap: 10px;
  margin-block-end: 20px;
}

.page-contact .flow-block h2,
.page-contact .reply h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4.4vw, 34px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-contact .flow-block__intro {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-100);
}

/* 受理范围 */
.page-contact .topics {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-700);
}

.page-contact .topic {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding: 18px 10px 18px 0;
  border-bottom: 1px solid var(--line-700);
  transition: background var(--dur) var(--ease);
}

.page-contact .topic:hover {
  background: var(--ink-800);
}

.page-contact .topic__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime-400);
}

.page-contact .topic__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-contact .topic__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-100);
}

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

.page-contact .topic__body .topic__prep {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--blue-500);
  font-size: 13px;
  line-height: 1.65;
  color: var(--blue-300);
}

.page-contact .topic__body a,
.page-contact .visit a,
.page-contact .contact-close p a {
  color: var(--blue-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .topic__body a:hover,
.page-contact .visit a:hover,
.page-contact .contact-close p a:hover {
  color: var(--lime-400);
}

/* 流程配图 */
.page-contact .flow-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line-700);
  background: var(--ink-800);
}

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

.page-contact .flow-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-700);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist-600);
}

/* 四步阶梯 */
.page-contact .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-700);
  border: 1px solid var(--line-700);
}

.page-contact .step {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: var(--ink-800);
  border-top: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .step:hover,
.page-contact .step:focus-within {
  border-top-color: var(--lime-400);
  background: #111C2A;
}

.page-contact .step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-400);
}

.page-contact .step h3 {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-contact .step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist-100);
}

.page-contact .step .step__extra {
  padding-left: 8px;
  border-left: 2px solid var(--blue-500);
  font-size: 13px;
  line-height: 1.6;
  color: var(--blue-300);
}

/* 回复时效 */
.page-contact .reply {
  display: grid;
  gap: 10px;
  padding: 24px 20px;
  background: var(--teal-900);
  border-left: 3px solid var(--lime-400);
}

.page-contact .reply__clock {
  margin: 4px 0 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 42px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime-400);
}

.page-contact .reply__dash {
  color: var(--mist-600);
}

.page-contact .reply__days {
  margin: -6px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist-100);
}

.page-contact .reply__list {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .reply__list li {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-100);
}

.page-contact .reply__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: 8px;
  background: var(--lime-400);
}

/* 寄送与到访 */
.page-contact .visit {
  display: grid;
  gap: 14px;
  padding-left: 16px;
  border-left: 1px solid var(--line-700);
}

.page-contact .visit p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-contact .visit .visit__link {
  font-size: 14px;
  color: var(--mist-600);
}

/* 收束深色带 */
.page-contact .contact-close {
  padding-block: 36px 40px;
  background: var(--indigo-900);
  border-top: 1px solid var(--line-700);
}

.page-contact .contact-close__inner {
  display: grid;
  gap: 24px;
}

.page-contact .contact-close h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-contact .contact-close p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-contact .contact-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 640px) {
  .page-contact .contact-head {
    padding-block: 32px 52px;
  }

  .page-contact .direct__inner {
    padding: 24px 24px 28px;
  }

  .page-contact .direct__title {
    font-size: 30px;
  }

  .page-contact .channel {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .page-contact .topic {
    grid-template-columns: 34px minmax(0, 1fr);
    padding-inline-end: 16px;
  }

  .page-contact .step {
    padding: 20px;
  }
}

@media (min-width: 900px) {
  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: end;
  }

  .page-contact .step {
    justify-content: flex-end;
    min-height: 200px;
  }

  .page-contact .step:nth-child(2) {
    min-height: 238px;
  }

  .page-contact .step:nth-child(3) {
    min-height: 276px;
  }

  .page-contact .step:nth-child(4) {
    min-height: 314px;
    background: var(--teal-900);
  }

  .page-contact .contact-close__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-contact .contact-close__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-head__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .page-contact .contact-body {
    grid-template-columns: minmax(300px, 396px) minmax(0, 1fr);
    gap: 56px;
    padding-block: 56px 72px;
  }

  .page-contact .direct {
    position: sticky;
    top: 76px;
    align-self: start;
  }

  .page-contact .direct__inner {
    padding: 26px 26px 30px;
  }

  .page-contact .flow-col {
    gap: 56px;
  }

  .page-contact .reply {
    padding: 30px 28px;
  }
}