.page-contact {
  --contact-shadow: 8px 8px 0 var(--paper-2), 8px 8px 0 1px var(--line);
  --contact-shadow-accent: 8px 8px 0 var(--orange-soft), 8px 8px 0 1px var(--line);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-head {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4.5vw, 48px) 0 clamp(24px, 4.5vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-head::after {
  content: "";
  position: absolute;
  top: -12%;
  right: -8%;
  width: min(44%, 480px);
  height: 124%;
  background: linear-gradient(152deg, var(--orange) 0%, var(--orange-deep) 52%, var(--ice-deep) 100%);
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.9;
  pointer-events: none;
}

.page-contact .contact-head > * {
  position: relative;
  z-index: 1;
}

.page-contact .contact-head .page-title {
  max-width: 20ch;
  margin: 14px 0 0;
}

.page-contact .contact-head .lede {
  max-width: 62ch;
  margin-top: 18px;
}

.page-contact .head-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-contact .head-facts li {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
  line-height: 1.5;
}

.page-contact .head-facts b {
  display: block;
  font-family: var(--sans);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

/* ---------- 分屏骨架 ---------- */
.page-contact .contact-split {
  display: grid;
  gap: clamp(36px, 5vw, 60px);
  padding-block: clamp(36px, 5vw, 72px);
}

.page-contact .contact-flow > .section + .section {
  margin-top: clamp(44px, 6vw, 76px);
}

.page-contact .section-intro {
  max-width: 56ch;
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.75;
}

.page-contact .section-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

/* ---------- 合作方式标签 ---------- */
.page-contact .tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-contact .tab {
  flex: 0 0 auto;
  cursor: pointer;
  padding: 10px 18px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .tab:hover {
  border-color: var(--ink);
}

.page-contact .tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  box-shadow: inset 0 -3px 0 var(--orange);
}

.page-contact .tab:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .tabpanels {
  display: block;
}

.page-contact .tabpanel {
  display: grid;
  gap: 16px;
  padding: clamp(20px, 3vw, 30px);
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--contact-shadow-accent);
}

.page-contact .tabpanel + .tabpanel {
  margin-top: 22px;
}

.page-contact .tabpanel[hidden] {
  display: none;
}

.page-contact .tabpanel h3 {
  margin: 0;
  font-size: var(--h3);
  line-height: 1.35;
  color: var(--ink);
}

.page-contact .tabpanel > p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-contact .point-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .point-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .point-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--orange);
}

.page-contact .ways-figure {
  margin: clamp(24px, 3.5vw, 34px) 0 0;
}

/* ---------- 媒体框 ---------- */
.page-contact .media-frame {
  border: 1px solid var(--ink);
  background: var(--paper-2);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-contact .figure-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--gray);
}

/* ---------- 推进节奏 ---------- */
.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .step-no {
  grid-column: 1;
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-contact .step h3 {
  grid-column: 2;
  margin: 0;
  font-size: var(--h3);
  line-height: 1.3;
}

.page-contact .step p {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 来访与远程 ---------- */
.page-contact .visit-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.4vw, 38px);
  background: var(--forest);
  border: 1px solid var(--forest-deep);
  border-radius: var(--radius);
  color: var(--forest-ink);
}

.page-contact .visit-panel::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle at 35% 35%, rgba(111, 183, 201, 0.34), rgba(18, 58, 50, 0) 70%);
  pointer-events: none;
}

.page-contact .visit-panel > * {
  position: relative;
  z-index: 1;
}

.page-contact .eyebrow-on-dark {
  color: var(--gold);
}

.page-contact .visit-panel .section-title {
  color: var(--paper);
  margin: 10px 0 0;
}

.page-contact .visit-panel > p {
  max-width: 58ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--forest-ink);
}

.page-contact .visit-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .visit-points li {
  display: grid;
  gap: 6px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--forest-ink);
}

.page-contact .tag-dark {
  justify-self: start;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  color: var(--gold);
  border: 1px solid rgba(199, 154, 68, 0.55);
  border-radius: var(--radius);
}

/* ---------- 沟通准备清单 ---------- */
.page-contact .brief-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .brief-item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .brief-key {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--ice-deep);
}

.page-contact .brief-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 侧栏联系面板 ---------- */
.page-contact .contact-aside {
  min-width: 0;
}

.page-contact .aside-sticky {
  display: grid;
  gap: 18px;
}

.page-contact .aside-visual {
  margin: 0;
}

.page-contact .contact-panel {
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--contact-shadow);
  overflow: hidden;
}

.page-contact .panel-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 20px;
  background: var(--ink);
}

.page-contact .panel-top .eyebrow {
  margin: 0;
  color: var(--gold);
}

.page-contact .panel-badge {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--paper);
  padding: 2px 8px;
  border: 1px solid var(--orange);
  background: rgba(226, 96, 28, 0.22);
  border-radius: var(--radius);
}

.page-contact .panel-body {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.page-contact .info-row {
  display: grid;
  gap: 5px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.page-contact .info-row:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.page-contact .info-key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-contact .info-val {
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .info-val.mono {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.01em;
}

/* 地址展开 */
.page-contact .addr-details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-2);
}

.page-contact .addr-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--ice-deep);
  list-style: none;
}

.page-contact .addr-details summary::-webkit-details-marker {
  display: none;
}

.page-contact .addr-details summary::after {
  content: "＋";
  color: var(--orange);
  font-size: 15px;
  line-height: 1;
}

.page-contact .addr-details[open] summary::after {
  content: "－";
}

.page-contact .addr-details summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .addr-body {
  padding: 0 14px 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 备案块 */
.page-contact .filing {
  display: grid;
  gap: 8px;
  padding: 16px;
  background: var(--forest);
  border: 1px solid var(--gold);
  border-radius: var(--radius);
}

.page-contact .info-key-on-dark {
  color: var(--forest-muted);
}

.page-contact .filing-code {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-contact .filing p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--forest-ink);
}

.page-contact .filing-subject {
  font-family: var(--mono);
  color: var(--paper);
  padding: 2px 6px;
  border: 1px solid rgba(199, 154, 68, 0.5);
  background: rgba(199, 154, 68, 0.16);
  word-break: break-all;
}

.page-contact .aside-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .aside-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}

.page-contact .aside-note a {
  color: var(--ice-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .aside-note a:hover {
  color: var(--orange-deep);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .brief-item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 8px 24px;
    align-items: baseline;
  }

  .page-contact .step {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 6px 24px;
  }

  .page-contact .visit-points li {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.24fr) minmax(320px, 0.76fr);
    align-items: start;
  }

  .page-contact .aside-sticky {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 719px) {
  .page-contact .contact-head::after {
    width: 38%;
    height: 56%;
    top: -6%;
    right: -12%;
    opacity: 0.5;
  }

  .page-contact .contact-head .page-title {
    max-width: none;
  }

  .page-contact .head-facts {
    gap: 12px 22px;
  }

  .page-contact .head-facts li {
    flex: 1 1 40%;
  }

  .page-contact .tabs {
    margin-inline: calc(var(--gutter) * -1);
    padding-inline: var(--gutter);
  }

  .page-contact .tabpanel {
    box-shadow: 5px 5px 0 var(--orange-soft), 5px 5px 0 1px var(--line);
  }

  .page-contact .contact-panel {
    box-shadow: 5px 5px 0 var(--paper-2), 5px 5px 0 1px var(--line);
  }

  .page-contact .step {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .page-contact .step-no {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .tab,
  .page-contact .contact-head::after {
    transition: none;
    animation: none;
  }
}