.page-contact {
  --contact-gap: clamp(18px, 3vw, 34px);
  --contact-offset: clamp(24px, 6vw, 112px);
  background: var(--night);
  color: var(--ink);
  overflow-x: hidden;
}

.page-contact .container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.page-contact .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-contact .breadcrumbs [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-top: clamp(18px, 3vw, 32px);
  background: var(--grad-stand);
}

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: clamp(26px, 5vw, 46px);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-bottom: clamp(30px, 5vw, 56px);
}

.page-contact .contact-hero__text h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.14;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-contact .contact-hero__text .lede {
  margin: 20px 0 0;
  max-width: 34ch;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .contact-hero__aside {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--grad-panel);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-contact .checklist-mini {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .checklist-mini li {
  position: relative;
  padding-left: 18px;
}

.page-contact .checklist-mini li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--mint);
}

.page-contact .checklist-mini a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-a16);
}

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

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

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: clamp(170px, 34vw, 380px);
  object-fit: cover;
  object-position: center 62%;
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 19, 31, 0.18) 0%, rgba(5, 19, 31, 0.55) 58%, var(--night) 100%);
}

/* ---------- 章节通用骨架 ---------- */
.page-contact .section {
  padding-block: var(--section-pad);
}

.page-contact .section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.26;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-contact .section-lede {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .chapter-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 52px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--line);
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

.page-contact .chapter-index:hover,
.page-contact .chapter-index:focus-visible,
.page-contact .chapter-index[aria-current="true"] {
  color: var(--cyan);
}

.page-contact .prose {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .figure {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1;
  color: var(--cyan);
}

/* ---------- 01 三条渠道 ---------- */
.page-contact .contact-channels {
  background: linear-gradient(180deg, var(--night) 0%, var(--relay) 100%);
}

.page-contact .contact-channels__head,
.page-contact .contact-routes__head,
.page-contact .contact-brief__head {
  display: grid;
  gap: 6px;
  margin-bottom: clamp(28px, 5vw, 52px);
}

.page-contact .contact-channels__grid {
  display: grid;
  gap: var(--contact-gap);
}

.page-contact .channel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--grad-panel);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--line);
  border-radius: var(--radius);
}

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

.page-contact .channel--service {
  border-top-color: var(--mint);
}

.page-contact .channel--phone {
  border-top-color: var(--coral);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.1vw, 20px);
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .channel--mail .channel__value {
  color: var(--cyan);
}

.page-contact .channel--service .channel__value {
  color: var(--mint);
}

.page-contact .channel--phone .channel__value {
  color: var(--coral);
}

.page-contact .channel__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .channel__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 02 问题分流条带 ---------- */
.page-contact .contact-routes {
  background: var(--relay);
}

.page-contact .route-list {
  border-top: 1px solid var(--line-soft);
}

.page-contact .route {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .route__toggle {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 6px;
  background: transparent;
  border: 0;
  color: var(--ink);
  font-family: inherit;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: background 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-contact .route__toggle:hover,
.page-contact .route__toggle:focus-visible {
  background: var(--cyan-a08);
  padding-left: 14px;
  outline: none;
}

.page-contact .route__toggle:focus-visible {
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.page-contact .route__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .route__title {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.page-contact .route__hint {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .route__toggle::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform 0.24s var(--ease);
}

.page-contact .route__toggle[aria-expanded="true"]::after {
  content: "–";
}

.page-contact .route__panel {
  overflow: hidden;
}

.page-contact .route__body {
  padding: 0 6px 24px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .route__body p {
  margin: 0;
  max-width: 62ch;
}

.page-contact .route__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  max-width: 62ch;
}

.page-contact .route__list li {
  position: relative;
  padding-left: 20px;
}

.page-contact .route__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 1px;
  background: var(--coral);
}

.page-contact .route__note {
  margin-top: 16px !important;
  padding: 12px 14px;
  background: var(--amber-a12);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 03 回复时效 ---------- */
.page-contact .contact-timing {
  background: linear-gradient(180deg, var(--relay) 0%, var(--night) 100%);
}

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

.page-contact .timing-figures {
  display: grid;
  gap: 20px;
  margin-top: clamp(26px, 4vw, 38px);
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .timing-figure {
  display: grid;
  gap: 8px;
}

.page-contact .timing-figure .mono-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .contact-shot {
  margin: 0;
}

.page-contact .contact-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-contact .contact-shot .media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 04 来函要素 ---------- */
.page-contact .contact-brief {
  background: var(--night);
}

.page-contact .brief-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .brief-item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num label"
    "num desc";
  gap: 4px 14px;
  padding: 18px 18px;
  background: var(--relay);
}

.page-contact .brief-item__num {
  grid-area: num;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .brief-item__label {
  grid-area: label;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .brief-item__desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 05 地址与备案 ---------- */
.page-contact .contact-registry {
  background: var(--relay);
}

.page-contact .contact-registry__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .registry-list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-contact .registry-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .registry-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(14px, 2vw, 17px);
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

/* ---------- 06 合作与授权 ---------- */
.page-contact .contact-partner {
  background: var(--night);
}

.page-contact .contact-partner__panel {
  padding: clamp(22px, 4vw, 48px);
  background: var(--grad-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-contact .contact-partner__head {
  display: grid;
  gap: 6px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .partner-grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .partner-cell {
  padding: 20px 18px;
  background: var(--tier);
}

.page-contact .partner-cell p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .partner-cell .mono-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-contact .contact-partner__note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--coral);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 结尾 ---------- */
.page-contact .contact-tail {
  background: linear-gradient(180deg, var(--night) 0%, var(--relay) 100%);
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-tail__inner {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

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

.page-contact .contact-tail .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 14px;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .contact-tail .btn--primary {
  background: var(--cyan);
  color: var(--night);
  border: 1px solid var(--cyan);
}

.page-contact .contact-tail .btn--primary:hover,
.page-contact .contact-tail .btn--primary:focus-visible {
  background: var(--mint);
  border-color: var(--mint);
}

.page-contact .contact-tail .btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.page-contact .contact-tail .btn--ghost:hover,
.page-contact .contact-tail .btn--ghost:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact a:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-contact .contact-hero__aside {
    margin-top: clamp(16px, 3vw, 44px);
  }

  .page-contact .contact-channels__head,
  .page-contact .contact-routes__head,
  .page-contact .contact-brief__head {
    grid-template-columns: minmax(72px, 108px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 34px);
    align-items: start;
  }

  .page-contact .contact-routes__head .section-title,
  .page-contact .contact-brief__head .section-title {
    margin-top: 0;
  }

  .page-contact .contact-routes__head > div,
  .page-contact .contact-brief__head > div {
    padding-top: 4px;
  }

  .page-contact .contact-channels__head .section-title {
    margin-top: 0;
  }

  .page-contact .contact-channels__head > div {
    padding-top: 4px;
  }

  .page-contact .contact-channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 2.6vw, 34px);
    align-items: start;
  }

  .page-contact .channel:nth-child(2) {
    margin-top: 56px;
  }

  .page-contact .channel:nth-child(3) {
    margin-top: 112px;
  }

  .page-contact .route__toggle {
    gap: 24px;
    padding: 22px 8px;
  }

  .page-contact .route__toggle:hover,
  .page-contact .route__toggle:focus-visible {
    padding-left: 18px;
  }

  .page-contact .route__title {
    font-size: 17px;
    min-width: 8em;
  }

  .page-contact .route__hint {
    font-size: 13.5px;
  }

  .page-contact .route__body {
    padding: 0 8px 30px 74px;
  }

  .page-contact .contact-timing__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(28px, 4vw, 60px);
  }

  .page-contact .contact-shot {
    margin-top: clamp(20px, 4vw, 62px);
  }

  .page-contact .timing-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .brief-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .contact-registry__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(24px, 5vw, 72px);
    align-items: start;
  }

  .page-contact .contact-registry__intro {
    position: sticky;
    top: 24px;
  }

  .page-contact .contact-tail__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

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

@media (min-width: 1024px) {
  .page-contact .route__toggle {
    padding: 26px 10px;
  }

  .page-contact .route__body {
    padding-left: 96px;
    max-width: 78ch;
  }

  .page-contact .brief-item {
    padding: 22px 24px;
  }

  .page-contact .partner-cell {
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}