.page-contact {
  --contact-step-ink: rgba(169, 189, 212, .3);
  --contact-gap: clamp(30px, 6vw, 84px);
  --contact-neon-soft: rgba(75, 255, 158, .38);
}

.page-contact [id] {
  scroll-margin-top: 96px;
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

.page-contact a:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 2px;
}

/* 页首 */
.page-contact .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-contact .contact-head {
  max-width: 62ch;
  padding: clamp(22px, 4vw, 44px) 0 0;
}

.page-contact .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--neon);
}

.page-contact .page-title {
  margin: 0;
  font-size: clamp(29px, 6.6vw, 58px);
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--cold-white);
}

.page-contact .page-lede {
  margin: 18px 0 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.62;
  color: var(--mist-200);
}

.page-contact .contact-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

/* 头部横贯图 */
.page-contact .contact-hero {
  margin: clamp(26px, 5vw, 56px) auto 0;
  max-width: var(--shell-max);
  padding: 0 var(--gutter);
}

.page-contact .contact-hero img {
  display: block;
  width: 100%;
  height: clamp(180px, 40vw, 420px);
  object-fit: cover;
  border-radius: var(--radius-m);
  filter: saturate(.85) contrast(1.05);
}

/* 骨架 */
.page-contact .shell-split {
  padding-top: clamp(42px, 7vw, 96px);
}

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

.page-contact .section {
  padding-block: clamp(34px, 6vw, 74px);
}

.page-contact #citation {
  padding-block: clamp(56px, 10vw, 128px) clamp(34px, 6vw, 72px);
}

.page-contact .section-head {
  max-width: 56ch;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-contact .section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--steel-500);
}

.page-contact .section-title {
  margin: 8px 0 0;
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 600;
  font-style: italic;
  letter-spacing: -.01em;
  color: var(--cold-white);
}

.page-contact .section-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist-200);
}

.page-contact .lead-subtitle {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  font-style: italic;
  letter-spacing: .02em;
  color: var(--cold-white);
}

.page-contact .prose {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.62;
  color: var(--mist-200);
}

.page-contact .prose a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--contact-neon-soft);
  transition: border-color var(--t) var(--ease);
}

.page-contact .prose a:hover {
  border-bottom-color: var(--neon);
}

/* 首屏并排：材料清单 + 渠道 */
.page-contact .lead-grid {
  display: grid;
  gap: clamp(38px, 7vw, 82px);
}

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
}

.page-contact .prep-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--neon);
  padding-top: 4px;
}

.page-contact .prep-term {
  display: block;
  font-size: 16px;
  font-weight: 600;
  font-style: italic;
  color: var(--cold-white);
}

.page-contact .prep-desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist-200);
}

.page-contact .channel-list {
  display: grid;
  gap: 16px;
}

.page-contact .channel-card {
  padding: 20px;
  border: 1px solid var(--hair);
  border-left: 2px solid var(--steel-500);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-contact .channel-card:hover {
  border-color: var(--hair-strong);
  border-left-color: var(--mist-200);
}

.page-contact .channel-card--primary {
  border-color: var(--contact-neon-soft);
  border-left-color: var(--neon);
  background:
    linear-gradient(180deg, rgba(75, 255, 158, .07), rgba(75, 255, 158, 0) 72%),
    var(--ink-800);
}

.page-contact .channel-card--primary:hover {
  border-color: var(--neon);
}

.page-contact .channel-label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist-200);
}

.page-contact .channel-card--primary .channel-label {
  color: var(--neon);
}

.page-contact .channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.55;
  color: var(--cold-white);
  overflow-wrap: anywhere;
}

.page-contact .channel-tel {
  color: var(--cold-white);
  text-decoration: none;
  border-bottom: 1px solid var(--contact-neon-soft);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-contact .channel-tel:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-contact .channel-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-200);
  opacity: .82;
}

.page-contact .channel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-contact .copy-btn {
  font: inherit;
  font-size: 13px;
  padding: 7px 16px;
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--cold-white);
  cursor: pointer;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-contact .copy-btn:hover {
  border-color: var(--neon);
  color: var(--neon);
}

.page-contact .copy-btn[data-copied] {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(75, 255, 158, .1);
}

/* 处理节奏 */
.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .step-item {
  display: grid;
  gap: 10px;
  padding: clamp(26px, 4vw, 42px) 0;
  border-top: 1px solid var(--hair);
  transition: border-color var(--t) var(--ease);
}

.page-contact .step-item:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-contact .step-item:hover {
  border-top-color: var(--hair-strong);
}

.page-contact .step-num {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(46px, 8vw, 86px);
  line-height: .88;
  letter-spacing: -.04em;
  color: var(--contact-step-ink);
  transition: color var(--t) var(--ease);
}

.page-contact .step-item:hover .step-num {
  color: var(--neon);
}

.page-contact .step-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  font-style: italic;
  color: var(--cold-white);
}

.page-contact .step-body p {
  margin: 8px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.62;
  color: var(--mist-200);
}

.page-contact .flow-figure {
  margin: clamp(38px, 7vw, 74px) 0 0;
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  filter: saturate(.9);
}

/* 引用与协作 */
.page-contact .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .rule-item {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.62;
  color: var(--mist-200);
}

.page-contact .rule-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 10px;
  height: 2px;
  background: var(--neon);
}

/* 备案与服务范围 */
.page-contact .filing-block {
  display: grid;
  gap: 20px 32px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--hair);
  border-radius: var(--radius-m);
  background:
    linear-gradient(180deg, rgba(27, 47, 92, .5), rgba(11, 20, 40, .9)),
    var(--ink-800);
}

.page-contact .filing-key {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel-500);
}

.page-contact .filing-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--cold-white);
  overflow-wrap: anywhere;
}

.page-contact .filing-tail {
  margin-top: clamp(18px, 3vw, 28px);
}

/* 响应式 */
@media (min-width: 760px) {
  .page-contact .step-item {
    grid-template-columns: minmax(104px, 156px) minmax(0, 1fr);
    gap: clamp(20px, 4vw, 56px);
    align-items: start;
  }

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

@media (min-width: 1000px) {
  .page-contact .lead-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-contact .filing-block {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</style>