.page-contact {
  background-color: var(--blue-night);
  color: var(--on-night);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  background-color: var(--blue-night);
  border-bottom: 1px solid var(--line);
  padding-block: 0.7rem;
}

.page-contact .breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.page-contact .breadcrumb-list li {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.page-contact .breadcrumb-list li + li::before {
  content: "/";
  color: var(--line);
}

.page-contact .breadcrumb-list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-contact .breadcrumb-list a:hover,
.page-contact .breadcrumb-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb-list a[aria-current="page"] {
  color: var(--on-night);
  border-bottom-color: transparent;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(135deg, rgba(46, 155, 230, 0.16) 0%, rgba(10, 18, 32, 0) 58%),
    linear-gradient(315deg, rgba(33, 212, 194, 0.1) 0%, rgba(10, 18, 32, 0) 42%);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.32;
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: clamp(-6rem, -6vw, 0rem);
  width: clamp(180px, 34vw, 420px);
  aspect-ratio: 1 / 1;
  border: 1px solid var(--flag-yellow);
  opacity: 0.34;
  transform: rotate(18deg);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 62rem;
  padding-block: clamp(2.6rem, 7vw, 5rem);
}

.page-contact .contact-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 6.4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0.7rem 0 1rem;
  max-width: 20ch;
}

.page-contact .contact-hero .lede {
  color: var(--on-night);
  max-width: 46ch;
}

.page-contact .contact-hero .tag-row {
  margin-top: 1.5rem;
}

.page-contact .contact-hero__aside {
  margin: 1.4rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--on-night-soft);
  max-width: 44ch;
}

.page-contact .contact-hero__aside a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 212, 194, 0.45);
  margin-left: 0.25rem;
}

.page-contact .contact-hero__aside a:hover,
.page-contact .contact-hero__aside a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 通道分工 ---------- */
.page-contact .contact-channels .section-head {
  max-width: 44rem;
}

.page-contact .channel-stack {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .channel-card {
  position: relative;
  border: 1px solid var(--line);
  border-left: 3px solid var(--flag-blue);
  border-radius: var(--r);
  background-image: linear-gradient(180deg, rgba(18, 28, 48, 0.92), rgba(10, 18, 32, 0.92));
  padding: 1.3rem 1.35rem 1.45rem;
  transition: border-color 140ms var(--ease), transform 140ms var(--ease);
}

.page-contact .channel-card--quiet {
  border-left-color: var(--flag-red);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-1px);
}

.page-contact .channel-card__lead {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.page-contact .channel-card__lead .card-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .channel-card__lead .card-idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--flag-yellow);
}

.page-contact .channel-card__value {
  margin: 1rem 0 0.75rem;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 3.6vw, 1.22rem);
  letter-spacing: 0.08em;
  color: var(--white);
  border-top: 1px dashed var(--line);
  padding-top: 0.9rem;
  word-break: break-word;
}

.page-contact .channel-card__use {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--on-night);
  max-width: 58ch;
}

.page-contact .stack-note {
  margin: 1.6rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-left: 2px solid var(--flag-yellow);
  padding-left: 0.85rem;
}

/* ---------- 纠错提交 ---------- */
.page-contact .correct-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

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

.page-contact .step-item {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 1rem;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--paper-line);
  position: relative;
}

.page-contact .step-item:first-child {
  border-top: 1px solid var(--paper-line);
}

.page-contact .step-item::before {
  content: "";
  position: absolute;
  left: 1.18rem;
  top: 2.9rem;
  bottom: -0.6rem;
  width: 1px;
  background-color: var(--flag-blue);
  opacity: 0.45;
}

.page-contact .step-item:last-child::before {
  display: none;
}

.page-contact .step-no {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--flag-blue);
  letter-spacing: 0.08em;
  line-height: 1.6;
  background-color: var(--paper);
  position: relative;
  z-index: 1;
}

.page-contact .step-title {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-contact .step-body p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 52ch;
}

.page-contact .correct-aside {
  position: relative;
  border: 1px solid var(--paper-line);
  border-radius: var(--r);
  background-color: var(--white);
  padding: 1.4rem 1.35rem 1.5rem;
  align-self: start;
}

.page-contact .correct-aside .eyebrow {
  color: var(--flag-blue);
}

.page-contact .correct-kv {
  margin: 1rem 0 1.3rem;
}

.page-contact .correct-kv dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-top: 0.85rem;
}

.page-contact .correct-kv dd {
  margin: 0.2rem 0 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--ink);
}

.page-contact .contact-correct .figure {
  margin-top: clamp(1.8rem, 5vw, 3rem);
}

/* ---------- 阵容变动线索 ---------- */
.page-contact .clue-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-contact .clue-card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background-image: linear-gradient(160deg, rgba(18, 28, 48, 0.95), rgba(10, 18, 32, 0.95));
  padding: 1.35rem 1.35rem 1.5rem;
}

.page-contact .clue-card .card-title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--white);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}

.page-contact .clue-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-contact .clue-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--on-night);
}

.page-contact .clue-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background-color: var(--flag-green);
}

.page-contact .clue-list--route li {
  padding-left: 2rem;
}

.page-contact .clue-list--route li::before {
  display: none;
}

.page-contact .route-idx {
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 1.35rem;
  height: 1.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--blue-night);
  background-color: var(--flag-yellow);
}

.page-contact .clue-card .btn {
  margin-top: 1.4rem;
}

/* ---------- 响应节奏 ---------- */
.page-contact .rhythm-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  background-color: var(--paper-line);
  border: 1px solid var(--paper-line);
}

.page-contact .rhythm-item {
  background-color: var(--white);
  padding: 1.3rem 1.25rem 1.45rem;
}

.page-contact .rhythm-item--alert {
  background-color: #FFF6F5;
}

.page-contact .rhythm-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .rhythm-val {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 4.4vw, 1.4rem);
  letter-spacing: 0.04em;
  color: var(--ink);
  line-height: 1.25;
}

.page-contact .rhythm-item--alert .rhythm-val {
  color: var(--flag-red);
}

.page-contact .rhythm-item p {
  margin: 0.7rem 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 40ch;
}

.page-contact .contact-rhythm .figure {
  margin-top: clamp(1.8rem, 5vw, 3rem);
}

/* ---------- 服务区域与备案 ---------- */
.page-contact .region-grid {
  display: grid;
  gap: clamp(1.6rem, 5vw, 3rem);
}

.page-contact .region-copy {
  max-width: 48ch;
}

.page-contact .region-copy .section-title {
  color: var(--white);
}

.page-contact .region-copy p {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--on-night);
}

.page-contact .region-panel {
  position: relative;
  border: 1px solid var(--line);
  border-top: 2px solid var(--flag-yellow);
  border-radius: var(--r);
  background-color: rgba(18, 28, 48, 0.78);
  padding: 1.4rem 1.35rem 1.5rem;
  align-self: start;
}

.page-contact .region-panel .eyebrow {
  color: var(--flag-yellow);
}

.page-contact .region-kv {
  margin: 1rem 0 0;
}

.page-contact .region-kv dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 0.9rem;
}

.page-contact .region-kv dd {
  margin: 0.22rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 提交之后 ---------- */
.page-contact .next-grid {
  display: grid;
  gap: 1.6rem;
  align-items: end;
}

.page-contact .next-grid .section-title {
  color: var(--white);
}

.page-contact .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-card {
    display: grid;
    grid-template-columns: minmax(0, 15rem) 1fr;
    column-gap: 1.6rem;
    align-items: start;
  }

  .page-contact .channel-card__lead {
    grid-column: 1;
    align-self: start;
  }

  .page-contact .channel-card__value {
    grid-column: 1;
    margin-top: 0;
    border-top: 0;
    padding-top: 0.6rem;
  }

  .page-contact .channel-card__use {
    grid-column: 2;
    grid-row: 1 / span 2;
    border-left: 1px solid var(--line);
    padding-left: 1.6rem;
    align-self: stretch;
    display: flex;
    align-items: center;
  }

  .page-contact .rhythm-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-contact .correct-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .clue-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 1.5rem;
  }

  .page-contact .region-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .next-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2.5rem;
  }
}

@media (max-width: 460px) {
  .page-contact .contact-hero__title {
    font-size: 1.72rem;
  }

  .page-contact .channel-card__value {
    font-size: 0.9rem;
    letter-spacing: 0.04em;
  }

  .page-contact .step-item {
    grid-template-columns: 2.2rem 1fr;
    gap: 0.7rem;
  }

  .page-contact .step-item::before {
    left: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within {
    transform: none;
  }
}