.page-contact {
  --pc-lede: #C7D2DF;
  --pc-sub: #9FB0C2;
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(72px, 10vw, 140px);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.page-contact .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .breadcrumb__item a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--fast) var(--ease);
}
.page-contact .breadcrumb__item a:hover,
.page-contact .breadcrumb__item a:focus-visible {
  color: var(--gold);
}
.page-contact .breadcrumb__item span[aria-current="page"] {
  color: var(--pc-sub);
}
.page-contact .breadcrumb__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(30px, 5vw, 64px) 0 clamp(24px, 3.5vw, 44px);
}
.page-contact .eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 64px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--paper);
}
.page-contact .contact-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--pc-lede);
}
.page-contact .contact-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: clamp(16px, 2vw, 22px) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.page-contact .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
}
.page-contact .media-frame__inner {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .media-frame--wide .media-frame__inner {
  aspect-ratio: 1400 / 800;
}
.page-contact .media-frame--band .media-frame__inner {
  aspect-ratio: 1200 / 700;
}
.page-contact .media-frame__caption {
  padding: 12px clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--ink-2);
}
.page-contact .contact-band {
  margin-top: clamp(8px, 2vw, 18px);
}

/* ---------- 章节识别 ---------- */
.page-contact .sec-head {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2.5vw, 30px);
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(20px, 3vw, 34px);
  border-top: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 76px);
}
.page-contact section:first-of-type .sec-head {
  margin-top: clamp(32px, 5vw, 56px);
}
.page-contact .sec-num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7vw, 80px);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: var(--line);
  transition: color var(--slow) var(--ease);
}
.page-contact [data-section].is-visible .sec-num {
  color: var(--gold);
}
.page-contact .sec-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.4;
  color: var(--paper);
}

/* ---------- 三栏渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-contact .channel {
  padding: clamp(22px, 4vw, 32px) 0;
  outline-offset: 6px;
}
.page-contact .channel + .channel {
  border-top: 1px solid var(--line);
}
.page-contact .channel:focus-visible {
  outline: 2px solid var(--gold);
}
.page-contact .channel__role {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.page-contact .channel__name {
  margin: 0 0 16px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--paper);
}
.page-contact .channel__value {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(14.5px, 1.6vw, 16.5px);
  line-height: 1.75;
  letter-spacing: 0.02em;
  word-break: break-word;
  color: var(--gold-lift);
}
.page-contact .channel__copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 18px;
}
.page-contact .copy-btn {
  appearance: none;
  padding: 7px 16px;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.page-contact .copy-btn:hover {
  color: var(--gold-lift);
  border-color: var(--gold-lift);
}
.page-contact .copy-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.page-contact .channel__status {
  margin: 0;
  min-height: 1em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--jade);
}
.page-contact .channel__fit {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pc-lede);
}
.page-contact .channel__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.page-contact .channel__tags a {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--line);
  color: var(--pc-sub);
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.page-contact .channel__tags a:hover,
.page-contact .channel__tags a:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}
.page-contact .channel__tags a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- 邮箱说明 ---------- */
.page-contact .mail-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}
.page-contact .mail-list {
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-contact .mail-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-contact .mail-list__mark {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.page-contact .mail-list__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-lede);
}
.page-contact .mail-list__text strong {
  display: block;
  margin-bottom: 4px;
  color: var(--paper);
  font-weight: 700;
}
.page-contact .prose p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-lede);
}
.page-contact .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 来信四项 ---------- */
.page-contact .fields {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}
.page-contact .field {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 3vw, 30px);
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .field__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.page-contact .field__title {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17.5px;
  line-height: 1.5;
  color: var(--paper);
}
.page-contact .field__text {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pc-lede);
}

/* ---------- 到访 ---------- */
.page-contact .visit-panel {
  padding: clamp(26px, 4vw, 52px);
  background: var(--paper);
  color: var(--graphite);
  border: 1px solid var(--paper-line);
}
.page-contact .visit-meta {
  margin: 0 0 clamp(20px, 3vw, 28px);
}
.page-contact .visit-meta__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--paper-line);
}
.page-contact .visit-meta dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--graphite-soft);
}
.page-contact .visit-meta dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}
.page-contact .visit-panel p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--graphite-soft);
}
.page-contact .visit-panel p:last-child {
  margin-bottom: 0;
}
.page-contact .visit-panel a {
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.page-contact .visit-panel a:hover,
.page-contact .visit-panel a:focus-visible {
  color: var(--cinnabar);
  border-color: var(--cinnabar);
}
.page-contact .visit-panel a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 绑定流程 ---------- */
.page-contact .flow-rail {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 clamp(22px, 3vw, 36px);
}
.page-contact .flow-rail polyline {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.6;
}
.page-contact .flow-rail .rail-node {
  fill: var(--gold);
}
.page-contact .flow-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-contact .flow-step {
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--line);
  outline-offset: 6px;
  transition: padding-left var(--fast) var(--ease);
}
.page-contact .flow-step:focus-visible {
  outline: 2px solid var(--gold);
}
.page-contact .flow-step__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
}
.page-contact .flow-step__idx {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
}
.page-contact .flow-step__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17.5px;
  line-height: 1.5;
  color: var(--paper);
}
.page-contact .flow-step__time {
  flex: 0 0 auto;
  padding: 3px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--pc-sub);
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease), border-color var(--fast) var(--ease);
}
.page-contact .flow-step:hover .flow-step__time,
.page-contact .flow-step:focus-within .flow-step__time {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}
.page-contact .flow-step__text {
  margin: 12px 0 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pc-lede);
}

/* ---------- 自助查找 ---------- */
.page-contact .route-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-contact .route-link {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  transition: padding-left var(--fast) var(--ease);
}
.page-contact .route-link:hover {
  padding-left: 10px;
}
.page-contact .route-link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}
.page-contact .route-link__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-contact .route-link__t {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--pc-lede);
}
.page-contact .route-link__go {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--fast) var(--ease);
}
.page-contact .route-link:hover .route-link__go {
  color: var(--gold);
}
.page-contact .closing-line {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: clamp(18px, 2.5vw, 26px);
  border-top: 1px solid var(--line-soft);
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pc-lede);
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-contact .sec-head {
    flex-direction: column;
    gap: 10px;
  }
  .page-contact .sec-num {
    font-size: 44px;
  }
}

@media (min-width: 760px) {
  .page-contact .fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
  .page-contact .route-link {
    grid-template-columns: 132px minmax(0, 1fr) auto;
    align-items: center;
    gap: 0 24px;
  }
  .page-contact .visit-meta__row {
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .channel {
    padding: clamp(26px, 3vw, 38px) clamp(20px, 2.6vw, 36px);
  }
  .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);
  }
  .page-contact .mail-block {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-contact .flow-steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--line);
  }
  .page-contact .flow-step {
    padding: clamp(22px, 2.6vw, 32px) clamp(16px, 2vw, 28px) clamp(22px, 2.6vw, 32px) 0;
    border-bottom: 0;
  }
  .page-contact .flow-step + .flow-step {
    border-left: 1px solid var(--line);
    padding-left: clamp(16px, 2vw, 28px);
  }
  .page-contact .flow-step__head {
    flex-direction: column;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel__tags a,
  .page-contact .copy-btn,
  .page-contact .flow-step,
  .page-contact .flow-step__time,
  .page-contact .route-link,
  .page-contact .route-link__go,
  .page-contact .sec-num {
    transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
  }
  .page-contact .route-link:hover {
    padding-left: 0;
  }
  .page-contact .flow-step:hover {
    padding-left: 0;
  }
}