.page-contact {
  background: var(--ink);
  color: var(--white);
  padding-bottom: 88px;
  overflow-x: clip;
}

.page-contact .breadcrumb {
  padding: 28px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-contact .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

.page-contact .breadcrumb__sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 32px;
  padding: 34px 0 52px;
  align-items: center;
}

.page-contact .contact-hero__title {
  font-size: clamp(36px, 8.4vw, 74px);
  line-height: 1.08;
  margin: 14px 0 20px;
}

.page-contact .contact-hero .lead {
  max-width: 34em;
  margin: 0 0 16px;
}

.page-contact .contact-hero .prose {
  margin: 0;
}

.page-contact .contact-hero__fig {
  position: relative;
  margin: 0;
}

.page-contact .contact-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(0.62) brightness(0.8) contrast(1.05);
}

.page-contact .contact-hero__fig::before,
.page-contact .contact-hero__fig::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.page-contact .contact-hero__fig::before {
  top: -7px;
  left: -7px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
}

.page-contact .contact-hero__fig::after {
  bottom: -7px;
  right: -7px;
  border-bottom: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
}

/* ---------- 渠道主体 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: 34px;
  padding: 0 0 68px;
}

.page-contact .contact-card {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
}

.page-contact .contact-card__head {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .contact-card__title {
  margin: 0 0 18px;
  font-size: 19px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--white);
}

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

.page-contact .contact-card__item {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-card__item:last-child {
  padding-bottom: 0;
}

.page-contact .contact-card__k {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

.page-contact .contact-card__v {
  margin: 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-contact .contact-card__v a {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed var(--line);
  transition: border-color 0.2s var(--ease);
}

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

.page-contact .contact-card__hint {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .contact-main .section {
  padding-top: 4px;
}

.page-contact .contact-main .h2 {
  margin: 12px 0 16px;
}

.page-contact .contact-main .lead {
  max-width: 40em;
  margin: 0 0 26px;
}

.page-contact .channels {
  display: grid;
}

.page-contact .channel {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 14px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  transition: border-color 0.25s var(--ease);
}

.page-contact .channel:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .channel:hover {
  border-top-color: var(--cyan);
}

.page-contact .channel__idx {
  padding-top: 6px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  transition: color 0.25s var(--ease);
}

.page-contact .channel:hover .channel__idx {
  color: var(--gold);
}

.page-contact .channel__title {
  margin: 0 0 10px;
  font-size: 21px;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-contact .channel__desc {
  margin: 0 0 10px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .channel__desc a,
.page-contact .contact-foot a:not(.btn) {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.2s var(--ease);
}

.page-contact .channel__desc a:hover,
.page-contact .contact-foot a:not(.btn):hover {
  border-bottom-color: var(--cyan);
}

.page-contact .channel__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

/* ---------- 回复节奏色带 ---------- */
.page-contact .contact-band {
  background: var(--panel-2);
  border-top: 1px solid var(--cyan);
  border-bottom: 1px solid var(--line);
  padding: 52px 0 56px;
  margin-bottom: 8px;
}

.page-contact .contact-band .eyebrow {
  color: var(--cyan);
}

.page-contact .contact-band__title {
  margin: 12px 0 32px;
  font-size: clamp(25px, 4.6vw, 40px);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-contact .rhythm__item {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-contact .rhythm__num {
  margin: 0;
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 200;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .rhythm__label {
  margin: 10px 0 8px;
  font-size: 15px;
  color: var(--gold);
}

.page-contact .rhythm__desc {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 邮件写法 ---------- */
.page-contact .section {
  padding: 64px 0;
}

.page-contact .section--tight {
  padding: 20px 0 0;
}

.page-contact .mail-guide__grid {
  display: grid;
  gap: 30px;
}

.page-contact .mail-guide .h2 {
  margin: 12px 0 16px;
}

.page-contact .mail-guide .lead {
  margin: 0 0 14px;
  max-width: 30em;
}

.page-contact .mail-steps {
  list-style: none;
  counter-reset: ms;
  margin: 0;
  padding: 0;
}

.page-contact .mail-steps li {
  counter-increment: ms;
  position: relative;
  padding: 0 0 26px 42px;
}

.page-contact .mail-steps li::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 6px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-contact .mail-steps li:last-child {
  padding-bottom: 0;
}

.page-contact .mail-steps li:last-child::after {
  display: none;
}

.page-contact .mail-steps li::before {
  content: counter(ms, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-contact .mail-steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 17px;
  font-weight: 500;
  color: var(--white);
}

.page-contact .mail-steps p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 到访 ---------- */
.page-contact .visit .h2 {
  margin: 12px 0 26px;
}

.page-contact .visit__fig {
  margin: 0 0 34px;
}

.page-contact .visit__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(0.55) brightness(0.74);
}

.page-contact .visit__grid {
  display: grid;
  gap: 30px;
}

.page-contact .visit__grid .prose {
  margin: 0 0 16px;
}

.page-contact .visit__addr {
  font-style: normal;
  font-size: 17px;
  line-height: 1.9;
  color: var(--white);
  border-left: 1px solid var(--cyan);
  padding-left: 16px;
  margin: 22px 0 0;
}

.page-contact .prep {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-2);
  align-self: start;
}

.page-contact .prep summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  font-size: 16px;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .prep summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
}

.page-contact .prep[open] summary::after {
  content: "–";
}

.page-contact .prep ul {
  list-style: none;
  margin: 0;
  padding: 0 20px 18px;
}

.page-contact .prep li {
  padding: 13px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .prep li strong {
  color: var(--white);
  font-weight: 500;
}

/* ---------- 底部行动 ---------- */
.page-contact .contact-foot {
  display: grid;
  gap: 18px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-foot p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 焦点反馈 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 760px) {
  .page-contact .rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 60px;
    padding: 56px 0 82px;
  }

  .page-contact .channel {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 0 26px;
    padding: 32px 0;
  }

  .page-contact .channel__idx {
    font-size: 13px;
    padding-top: 8px;
  }

  .page-contact .channel__title {
    font-size: 23px;
  }

  .page-contact .mail-guide__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 72px;
    align-items: start;
  }

  .page-contact .visit__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-contact .contact-body {
    grid-template-columns: 316px minmax(0, 1fr);
    gap: 72px;
    align-items: start;
    padding-bottom: 88px;
  }

  .page-contact .contact-card {
    position: sticky;
    top: 28px;
  }

  .page-contact .contact-main .section--tight {
    padding-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel__idx,
  .page-contact .contact-card__v a,
  .page-contact .breadcrumb a {
    transition: none;
  }
}