.page-contact {
  --ct-line: rgba(244, 241, 236, .10);
  --ct-line-strong: rgba(244, 241, 236, .20);
  background-color: var(--ink-900);
  background-image: repeating-linear-gradient(
    to right,
    rgba(244, 241, 236, .028) 0 1px,
    transparent 1px 96px
  );
  color: var(--paper);
  padding-bottom: clamp(48px, 6vw, 88px);
}

.page-contact .contact-crumb {
  padding-top: clamp(18px, 2.6vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  border-bottom: 1px solid var(--ct-line);
  padding: clamp(28px, 4vw, 56px) 0 clamp(40px, 5.5vw, 76px);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-contact .contact-hero__title {
  font-size: var(--fs-88);
  font-weight: 200;
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--paper);
}

.page-contact .contact-rule {
  display: block;
  width: min(200px, 45%);
  height: 1px;
  background: var(--rosso-600);
  margin: clamp(18px, 2.6vw, 28px) 0;
}

.page-contact .contact-hero__lead {
  font-size: var(--fs-18);
  line-height: 1.75;
  color: var(--paper-72);
  max-width: 46ch;
  margin: 0;
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin: 22px 0 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
  overflow-wrap: anywhere;
}

.page-contact .contact-hero__sep {
  color: var(--rosso-600);
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 1px solid var(--ct-line);
  background: var(--ink-700);
}

.page-contact .contact-hero__figure img,
.page-contact .correction__figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 本页索引带 ---------- */

.page-contact .page-index {
  background: var(--ink-700);
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .page-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  padding-block: 13px;
}

.page-contact .page-index__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--slate);
}

.page-contact .page-index__link {
  font-size: 14px;
  color: var(--paper-52);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .page-index__link:hover,
.page-contact .page-index__link:focus-visible,
.page-contact .page-index__link.is-active {
  color: var(--paper);
  border-bottom-color: var(--orange);
}

/* ---------- 章节骨架 ---------- */

.page-contact .contact-section {
  border-bottom: 1px solid var(--ct-line);
  padding: clamp(44px, 6vw, 88px) 0;
}

.page-contact .contact-section__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-contact .contact-section__title {
  font-size: var(--fs-56);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 24ch;
  color: var(--paper);
}

/* ---------- 四条通道 ---------- */

.page-contact .channel-list {
  display: grid;
  border-top: 1px solid var(--ct-line-strong);
}

.page-contact .channel {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 24px 0 24px 16px;
  border-bottom: 1px solid var(--ct-line);
  transition: background-color .3s var(--ease);
}

.page-contact .channel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: var(--orange);
  opacity: 0;
  transition: opacity .3s var(--ease);
}

.page-contact .channel:hover::before,
.page-contact .channel:focus-within::before {
  opacity: 1;
}

.page-contact .channel:hover {
  background-color: rgba(244, 241, 236, .022);
}

.page-contact .channel__num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 54px);
  font-weight: 200;
  line-height: .9;
  letter-spacing: .02em;
  color: rgba(244, 241, 236, .16);
  transition: color .3s var(--ease);
}

.page-contact .channel:hover .channel__num {
  color: rgba(255, 106, 19, .55);
}

.page-contact .channel__title {
  font-size: var(--fs-24);
  font-weight: 500;
  letter-spacing: .01em;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-contact .channel__lead {
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-52);
  margin: 0;
  max-width: 36ch;
}

.page-contact .channel__body > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-72);
  margin: 0;
}

.page-contact .channel__points {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .channel__points li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

.page-contact .channel__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 7px;
  height: 1px;
  background: var(--rosso-600);
}

/* ---------- 联系方式 ---------- */

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

.page-contact .reach {
  display: grid;
  gap: 7px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .reach__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-contact .reach__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.5vw, 19px);
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .reach__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-52);
}

/* ---------- 纠错提交 ---------- */

.page-contact .correction {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-contact .correction__text > p {
  font-size: var(--fs-18);
  line-height: 1.75;
  color: var(--paper-72);
  margin: 0 0 22px;
  max-width: 52ch;
}

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

.page-contact .correction__steps li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ct-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-72);
}

.page-contact .correction__step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--rosso-400);
  padding-top: 2px;
}

.page-contact .correction__figure {
  margin: 0;
  border: 1px solid var(--ct-line);
  background: var(--ink-700);
}

/* ---------- 合作流程 ---------- */

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

.page-contact .flow__step {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .flow__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--rosso-400);
}

.page-contact .flow__title {
  font-size: 17px;
  font-weight: 500;
  margin: 0;
  color: var(--paper);
}

.page-contact .flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-52);
}

/* ---------- 回复节奏 ---------- */

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

.page-contact .reply {
  display: grid;
  gap: 5px;
  padding: 17px 0;
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .reply__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-contact .reply__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper-52);
}

.page-contact .reply--key {
  background: linear-gradient(90deg, rgba(200, 16, 46, .16), rgba(200, 16, 46, 0) 68%);
}

.page-contact .reply--key .reply__key {
  color: var(--orange);
}

/* ---------- 参考资料 ---------- */

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

.page-contact .refs__item {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ct-line);
}

.page-contact .refs__link {
  font-size: 17px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--rosso-600);
  padding-bottom: 2px;
  justify-self: start;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .refs__link:hover,
.page-contact .refs__link:focus-visible {
  color: var(--rosso-400);
  border-bottom-color: var(--orange);
}

.page-contact .refs__note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-52);
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-contact .reply {
    grid-template-columns: minmax(0, 230px) minmax(0, 1fr);
    gap: 32px;
    align-items: baseline;
  }

  .page-contact .refs__item {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 32px;
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-contact .reach {
    grid-template-columns: 180px minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 30px;
    align-items: baseline;
    padding: 24px 0;
  }

  .page-contact .flow__step {
    grid-template-columns: 62px minmax(0, .74fr) minmax(0, 1.26fr);
    gap: 30px;
    align-items: baseline;
    padding: 24px 0;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: end;
  }

  .page-contact .channel {
    grid-template-columns: 92px minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(20px, 3vw, 44px);
    align-items: start;
    padding: 32px 0 34px 26px;
  }

  .page-contact .channel::before {
    top: 32px;
    bottom: 34px;
    width: 3px;
  }

  .page-contact .correction {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .82fr);
    align-items: start;
  }
}