.page-contact {
  background: var(--cloud);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--cloud);
  border-bottom: 1px solid var(--rock);
}

.page-contact .contact-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
  filter: grayscale(0.35) contrast(1.05);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 14, 16, 0.42) 0%, rgba(14, 14, 16, 0.84) 58%, var(--ink) 100%);
}

.page-contact .contact-hero__frame {
  position: absolute;
  inset: var(--s2);
  border: 1px solid rgba(216, 214, 208, 0.18);
  pointer-events: none;
  z-index: 1;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: var(--s7);
  padding-bottom: var(--s6);
}

.page-contact .contact-hero__kicker {
  display: block;
  color: var(--orange);
  margin: var(--s4) 0 var(--s3);
}

.page-contact .crumb--light {
  color: rgba(246, 245, 242, 0.68);
}

.page-contact .crumb--light a {
  color: var(--orange-soft);
  text-decoration: none;
}

.page-contact .crumb--light a:hover {
  color: var(--white);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.6vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-contact .contact-hero__lead {
  margin: var(--s4) 0 0;
  max-width: 42ch;
  color: rgba(246, 245, 242, 0.78);
  font-size: 0.98rem;
  line-height: 1.9;
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1) var(--s5);
  margin: var(--s5) 0 0;
  padding-top: var(--s3);
  border-top: 1px solid rgba(216, 214, 208, 0.2);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--orange-soft);
}

/* ---------- 三条通道 ---------- */
.page-contact .channels {
  background: var(--white);
  padding-block: var(--s6);
}

.page-contact .channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: var(--s4);
}

.page-contact .channel {
  padding-block: var(--s4);
}

.page-contact .channel + .channel {
  border-top: 1px solid var(--line);
}

.page-contact .channel__label {
  margin: 0 0 var(--s2);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mid);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .channel__value--mail {
  font-size: clamp(1rem, 2.4vw, 1.24rem);
  word-break: break-all;
  color: var(--orange-deep);
}

.page-contact .channel__value--addr {
  font-family: var(--font-sans);
  font-size: clamp(1.1rem, 2.4vw, 1.32rem);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: 0;
}

.page-contact .channel__hint {
  margin: var(--s2) 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mid);
}

.page-contact .channels__note {
  margin: var(--s5) 0 0;
  padding-top: var(--s3);
  border-top: 1px solid var(--line);
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--mid);
  max-width: 62ch;
}

@media (min-width: 820px) {
  .page-contact .channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .channel {
    padding-block: 0;
    padding-inline: var(--s4);
  }

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

  .page-contact .channel:last-child {
    padding-right: 0;
  }

  .page-contact .channel + .channel {
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

/* ---------- 发信准备 ---------- */
.page-contact .prep {
  background: var(--cloud);
  padding-block: var(--s6);
}

.page-contact .prep__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s5);
  margin-top: var(--s4);
}

.page-contact .prep__stack {
  min-width: 0;
}

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

.page-contact .checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--s3);
  padding-block: var(--s3);
  border-bottom: 1px solid var(--line);
}

.page-contact .checklist input[type="checkbox"] {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  appearance: none;
  -webkit-appearance: none;
  background: var(--white);
  border: 1px solid var(--rock);
  border-radius: 0;
  cursor: pointer;
  position: relative;
}

.page-contact .checklist input[type="checkbox"]:checked {
  background: var(--orange);
  border-color: var(--orange);
}

.page-contact .checklist input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 2px;
  width: 6px;
  height: 12px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}

.page-contact .checklist input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-contact .checklist label {
  display: block;
  cursor: pointer;
  min-width: 0;
}

.page-contact .checklist strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-contact .checklist span {
  display: block;
  margin-top: 4px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mid);
}

.page-contact .prep__done {
  display: none;
  margin: var(--s3) 0 0;
  padding: var(--s2) var(--s3);
  background: var(--teal);
  color: var(--white);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-contact .prep__stack:has(.checklist input:checked):not(:has(.checklist input:not(:checked))) .prep__done {
  display: block;
}

.page-contact .prep__aside {
  padding-left: var(--s3);
  border-left: 2px solid var(--orange);
  color: var(--mid);
  font-size: 0.93rem;
  line-height: 1.85;
}

.page-contact .prep__aside-label {
  margin: 0 0 var(--s2);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--orange-deep);
}

.page-contact .prep__aside p {
  margin: 0;
}

.page-contact .prep__aside a {
  color: var(--teal);
}

@media (min-width: 900px) {
  .page-contact .prep__body {
    grid-template-columns: 1.25fr 0.75fr;
    gap: var(--s6);
    align-items: start;
  }
}

/* ---------- 回复节奏 ---------- */
.page-contact .rhythm {
  background: var(--ink);
  color: var(--cloud);
  padding-block: var(--s6);
}

.page-contact .rhythm .sec-head {
  border-top-color: var(--rock);
}

.page-contact .rhythm .sec-head__num {
  color: var(--orange);
}

.page-contact .rhythm .sec-head__title {
  color: var(--cloud);
}

.page-contact .rhythm__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s5);
}

.page-contact .rhythm__lead {
  margin: var(--s4) 0 0;
  max-width: 44ch;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(246, 245, 242, 0.76);
}

.page-contact .rhythm__list {
  list-style: none;
  margin: var(--s4) 0 0;
  padding: 0;
  border-top: 1px solid var(--rock);
}

.page-contact .rhythm__list li {
  padding-block: var(--s3);
  border-bottom: 1px solid var(--rock);
}

.page-contact .rhythm__list strong {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--orange-soft);
  letter-spacing: 0.02em;
}

.page-contact .rhythm__list span {
  display: block;
  margin-top: 6px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(246, 245, 242, 0.72);
}

.page-contact .rhythm__media {
  margin: 0;
  min-width: 0;
}

.page-contact .rhythm__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--rock);
}

.page-contact .rhythm__media figcaption {
  margin-top: var(--s2);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: rgba(246, 245, 242, 0.5);
}

@media (min-width: 900px) {
  .page-contact .rhythm__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: var(--s6);
    align-items: start;
  }
}

/* ---------- 合作 ---------- */
.page-contact .partners {
  background: var(--white);
  padding-block: var(--s6);
}

.page-contact .partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s4);
  margin-top: var(--s4);
}

.page-contact .partners__item {
  border-top: 1px solid var(--line);
  padding-top: var(--s3);
}

.page-contact .partners__item h3 {
  margin: 0 0 var(--s2);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-contact .partners__item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--mid);
}

.page-contact .partners__item a {
  color: var(--teal);
}

@media (min-width: 760px) {
  .page-contact .partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s5) var(--s6);
  }
}

/* ---------- 备案信息 ---------- */
.page-contact .legal {
  background: var(--cloud);
  padding-block: var(--s6) var(--s7);
}

.page-contact .legal__list {
  margin: var(--s4) 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .legal__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding-block: var(--s3);
  border-bottom: 1px solid var(--line);
}

.page-contact .legal__row dt {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mid);
}

.page-contact .legal__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.98rem;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .legal__domain {
  position: relative;
  display: inline-block;
  border-bottom: 1px dashed var(--line);
  cursor: help;
}

.page-contact .legal__domain::after {
  content: "https://" attr(data-domain);
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  padding: 6px 10px;
  background: var(--ink);
  color: var(--cloud);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), visibility 0.18s var(--ease);
  z-index: 2;
}

.page-contact .legal__domain:hover::after,
.page-contact .legal__domain:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-contact .legal__note {
  margin: var(--s5) 0 0;
  max-width: 62ch;
  font-size: 0.84rem;
  line-height: 1.85;
  color: var(--mid);
}

@media (min-width: 640px) {
  .page-contact .legal__row {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: var(--s3);
  }
}

/* ---------- 收束线 ---------- */
.page-contact .contact-rule {
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--orange-soft) 44%, var(--teal) 100%);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .legal__domain::after {
    transition: none;
    transform: none;
  }
}
<<<END>>>