.page-contact {
  --contact-rule: rgba(216, 208, 193, 0.26);
  --contact-fill: rgba(16, 38, 58, 0.68);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 55% at 88% -8%, rgba(47, 217, 198, 0.10), transparent 62%),
    radial-gradient(90% 50% at -5% 4%, rgba(255, 107, 44, 0.08), transparent 58%);
  background-repeat: no-repeat;
  color: var(--paper-100);
  padding-bottom: clamp(48px, 7vw, 110px);
  overflow-x: hidden;
}

.page-contact :focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-contact .breadcrumb {
  padding-top: calc(var(--header-h) + 20px);
  font-size: 13px;
}

.page-contact .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.page-contact .breadcrumb__item::after {
  content: "/";
  color: var(--gray-500);
}

/* 首屏 */
.page-contact__intro {
  display: grid;
  gap: 22px;
  padding: 18px 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--contact-rule);
}

.page-contact__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-200);
}

.page-contact__title {
  margin: 0;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.14;
  font-size: clamp(28px, 6.2vw, 58px);
}

.page-contact__lede {
  margin: 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 4px 0 0;
  background: var(--contact-rule);
  border: 1px solid var(--contact-rule);
}

.page-contact__facts > div {
  background: var(--ink-900);
  padding: 14px 16px;
}

.page-contact__facts dt {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray-500);
}

.page-contact__facts dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--paper-100);
}

/* 分屏 */
.page-contact .split-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 56px);
  padding-top: clamp(34px, 5vw, 64px);
}

.page-contact__section {
  padding-bottom: clamp(44px, 6vw, 88px);
  width: 100%;
}

.page-contact .section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin: 0 0 14px;
}

.page-contact__lead {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cyan-200);
}

.page-contact .note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-500);
}

/* 纸面 */
.page-contact__stack {
  position: relative;
  margin: 24px 0 0;
}

.page-contact__stack::before {
  content: "";
  position: absolute;
  inset: 9px -9px -9px 9px;
  background: var(--paper-300);
  border-radius: var(--radius);
  opacity: 0.3;
}

.page-contact__paper {
  position: relative;
  background: var(--paper-100);
  color: var(--text-900);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
}

.page-contact .prose {
  margin: 0;
  color: var(--text-900);
  font-size: 16px;
  line-height: 1.85;
}

.page-contact__points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact__points li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-900);
}

.page-contact__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--signal-500);
}

.page-contact__point-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray-500);
}

/* 图像 */
.page-contact .figure {
  margin: clamp(24px, 3vw, 40px) 0 0;
}

.page-contact .figure__media {
  background: var(--ink-700);
  border: 1px solid var(--contact-rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray-500);
}

/* 区间图 */
.range-chart {
  margin: 24px 0 0;
  padding: 20px 16px 14px;
  background: var(--ink-700);
  border: 1px solid var(--contact-rule);
  border-radius: var(--radius);
}

.range-chart__track {
  position: relative;
  height: 18px;
  border-left: 1px solid var(--contact-rule);
  border-right: 1px solid var(--contact-rule);
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(100% / 12 - 1px),
    var(--contact-rule) calc(100% / 12 - 1px),
    var(--contact-rule) calc(100% / 12)
  );
}

.range-chart__seg {
  position: absolute;
  top: 3px;
  bottom: 3px;
  background: var(--signal-500);
}

.range-chart__seg--a {
  left: 16.66%;
  width: 25%;
}

.range-chart__seg--b {
  left: 41.66%;
  width: 33.34%;
}

.range-chart__seg--c {
  left: 75%;
  width: 25%;
}

.range-chart__scale {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
  color: var(--gray-500);
}

/* 分段切换 */
.page-contact__tabs {
  margin-top: 26px;
}

.page-contact .tablist {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  border-bottom: 1px solid var(--contact-rule);
}

.page-contact .tab {
  flex: 0 0 auto;
  padding: 12px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  cursor: pointer;
}

.page-contact .tab:hover {
  color: var(--cyan-200);
}

.page-contact .tab[data-active="true"] {
  color: var(--ink-900);
  background: var(--paper-100);
  border-color: var(--paper-300);
}

.page-contact .tabpanel[data-active="false"] {
  display: none;
}

.page-contact .tabpanel {
  padding-top: 24px;
}

.page-contact__table-wrap {
  overflow-x: auto;
  border: 1px solid var(--paper-300);
  border-radius: var(--radius);
  background: var(--paper-100);
}

.page-contact__table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
  color: var(--text-900);
}

.page-contact__table th {
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--paper-100);
  background: var(--ink-700);
}

.page-contact__table td {
  padding: 14px 16px;
  border-top: 1px solid var(--paper-300);
  line-height: 1.65;
  vertical-align: top;
}

.page-contact__table tbody tr:nth-child(even) {
  background: rgba(216, 208, 193, 0.28);
}

.page-contact__code {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--signal-500);
  white-space: nowrap;
}

/* 联系卡 */
.page-contact__channels {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

.contact-card {
  position: relative;
  background: var(--paper-100);
  color: var(--text-900);
  border: 1px solid var(--paper-300);
  border-radius: var(--radius);
  padding: 26px 22px 30px 30px;
}

.contact-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 8px;
  background: var(--signal-500);
}

.contact-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -9px;
  height: 9px;
  background-image: repeating-linear-gradient(
    135deg,
    var(--paper-100) 0,
    var(--paper-100) 6px,
    transparent 6px,
    transparent 12px
  );
}

.contact-card .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.contact-card__value {
  margin: 14px 0 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-900);
  word-break: break-all;
}

.contact-card__value--text {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.65;
}

.contact-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #3d4d5a;
}

.contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.page-contact .contact-card .btn--quiet {
  color: var(--text-900);
  border-color: var(--paper-300);
  background: transparent;
}

.page-contact .contact-card .btn--quiet:hover {
  border-color: var(--signal-500);
  color: var(--signal-500);
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan-400);
  background: transparent;
  border: 1px solid var(--hair);
  border-radius: 2px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .copy-btn:hover {
  color: var(--cyan-200);
  border-color: var(--cyan-400);
}

.page-contact .contact-card .copy-btn {
  color: var(--text-900);
  border-color: var(--paper-300);
}

.page-contact .copy-btn.is-copied {
  color: var(--ink-900);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-contact__service-note {
  margin: 30px 0 0;
  max-width: 60ch;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-400);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* 处理流程 */
.page-contact__flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--contact-rule);
}

.page-contact__flow li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--contact-rule);
}

.page-contact__stamp {
  grid-row: span 2;
  align-self: start;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-900);
  background: var(--signal-500);
  border-radius: 2px;
}

.page-contact__flow h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-contact__flow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 自检清单 */
.page-contact__checklist {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--contact-rule);
  border: 1px solid var(--contact-rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact__checklist li {
  background: var(--ink-700);
}

.page-contact__checklist label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
}

.page-contact__checklist label:hover {
  background: rgba(47, 217, 198, 0.07);
}

.page-contact__checklist input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  position: relative;
  background: transparent;
  border: 2px solid var(--cyan-400);
  border-radius: 2px;
  cursor: pointer;
}

.page-contact__checklist input:checked {
  background: var(--signal-500);
  border-color: var(--signal-500);
}

.page-contact__checklist input:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  transform: rotate(40deg);
}

.page-contact__check {
  display: grid;
  gap: 4px;
}

.page-contact__check-key {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--cyan-200);
}

.page-contact__check-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact__checklist input:checked ~ .page-contact__check .page-contact__check-key {
  color: var(--signal-300);
}

.page-contact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 索引条 */
.page-contact__rail {
  background: var(--ink-700);
  border: 1px solid var(--contact-rule);
  border-radius: var(--radius);
  padding: 20px 18px 22px;
}

.page-contact .index-rail__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--contact-rule);
}

.page-contact .index-rail__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-contact .index-rail__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray-500);
}

.page-contact .index-rail__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .index-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper-100);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .index-rail__link:hover {
  background: rgba(47, 217, 198, 0.08);
  border-left-color: var(--cyan-400);
}

.page-contact .index-rail__link[aria-current="true"] {
  background: rgba(255, 107, 44, 0.14);
  border-left-color: var(--signal-500);
  color: #ffffff;
}

.page-contact .index-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--cyan-400);
}

.page-contact__rail-actions {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--contact-rule);
}

.page-contact__rail-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray-500);
}

.page-contact__rail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.page-contact__rail-mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--paper-100);
  word-break: break-all;
}

.page-contact__rail-note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray-500);
}

@media (max-width: 1179px) {
  .page-contact .split-layout__rail {
    order: -1;
  }
}

@media (min-width: 720px) {
  .page-contact__facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact__channels {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-contact__flow {
    grid-template-columns: repeat(3, 1fr);
    border-top: 2px solid var(--contact-rule);
  }

  .page-contact__flow li {
    grid-template-columns: auto 1fr;
    padding: 26px 22px 26px 0;
    border-bottom: none;
    border-right: 1px dashed var(--contact-rule);
  }

  .page-contact__flow li:last-child {
    border-right: none;
    padding-right: 0;
  }
}

@media (min-width: 1024px) {
  .page-contact__channels {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1180px) {
  .page-contact .split-layout {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    align-items: start;
  }

  .page-contact .split-layout__rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-contact__panel {
    padding-right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .index-rail__link,
  .page-contact .copy-btn {
    transition: none;
  }
}