.page-contact {
  --contact-pad: clamp(18px, 2.2vw, 28px);
  --contact-sticky: 108px;
  position: relative;
  padding-bottom: clamp(56px, 8vw, 120px);
  background-image:
    radial-gradient(680px 420px at 90% -8%, rgba(124, 60, 255, 0.22), transparent 70%),
    radial-gradient(560px 400px at 2% 22%, rgba(35, 211, 238, 0.1), transparent 72%);
  background-repeat: no-repeat;
}

.page-contact .mono {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
}

.page-contact .block-idx {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-cyan);
  text-transform: uppercase;
}

.page-contact .block-head {
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.page-contact .block-head .section-title,
.page-contact .contact-rail__head .section-title {
  margin: 0 0 10px;
  font-family: var(--f-display);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--c-text);
}

.page-contact .block-head > p:last-child,
.page-contact .contact-rail__note {
  margin: 0;
  max-width: 46ch;
  color: var(--c-muted);
  font-size: 15px;
}

.page-contact .lead {
  max-width: 40ch;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.78;
}

.page-contact a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 211, 238, 0.4);
}

.page-contact a:hover {
  color: var(--c-lime);
  border-bottom-color: rgba(166, 255, 60, 0.6);
}

.page-contact .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 0;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background-color 0.26s ease, color 0.26s ease, border-color 0.26s ease;
}

.page-contact .btn--primary {
  background: var(--c-purple);
  color: var(--c-text);
}

.page-contact .btn--primary:hover {
  background: var(--c-cyan);
  color: #06121A;
}

.page-contact .btn--ghost {
  border: 1px solid var(--c-line);
  color: var(--c-text);
}

.page-contact .btn--ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: 18px 0 clamp(40px, 6vw, 76px);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-lime);
}

.page-contact .contact-hero h1 {
  margin: 0 0 18px;
  font-family: var(--f-display);
  font-size: clamp(38px, 7.4vw, 78px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .contact-hero__status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 20px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-contact .contact-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(124, 60, 255, 0.28), transparent 55%);
  pointer-events: none;
}

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

/* ---------- 主体双栏 ---------- */
.page-contact .contact-body__inner {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  align-items: start;
}

.page-contact .contact-rail__head {
  margin-bottom: 18px;
}

/* 联系卡片 */
.page-contact .contact-card {
  position: relative;
  margin-bottom: 16px;
  padding: var(--contact-pad);
  background: var(--c-panel);
  border: 1px solid rgba(35, 211, 238, 0.28);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: border-color 0.28s ease, transform 0.28s ease;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-brand);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.32s ease;
}

.page-contact .contact-card:hover {
  border-color: var(--c-purple);
  transform: translateY(-2px);
}

.page-contact .contact-card:hover::before {
  transform: scaleY(1);
}

.page-contact .contact-card__idx {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}

.page-contact .contact-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--c-text);
}

.page-contact .contact-card p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .contact-card__meta {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-amber);
  opacity: 0.72;
  transition: opacity 0.28s ease;
}

.page-contact .contact-card:hover .contact-card__meta {
  opacity: 1;
}

.page-contact .contact-card__addr {
  font-family: var(--f-mono);
  font-size: 15px;
  font-style: normal;
  line-height: 1.6;
  color: var(--c-text);
}

.page-contact .copy-line {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.page-contact .copy-text {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(15px, 1.5vw, 19px);
  letter-spacing: -0.01em;
  color: var(--c-text);
  word-break: break-all;
  transition: color 0.24s ease;
}

.page-contact .copy-hint {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-contact .copy-line:hover .copy-text,
.page-contact .copy-line:focus-visible .copy-text {
  color: var(--c-cyan);
}

.page-contact .copy-line:focus-visible {
  outline: 1px solid var(--c-cyan);
  outline-offset: 4px;
}

.page-contact .copy-line[data-copied] .copy-text {
  color: var(--c-lime);
}

/* 地址卡片底纹 */
.page-contact .contact-card--map {
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(rgba(35, 211, 238, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 211, 238, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-contact .contact-card__node {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-lime);
  box-shadow: 0 0 0 6px rgba(166, 255, 60, 0.14), 0 0 18px rgba(166, 255, 60, 0.5);
}

/* ---------- 受理范围 ---------- */
.page-contact .scope,
.page-contact .checklist-block,
.page-contact .response,
.page-contact .coop {
  margin-bottom: clamp(40px, 6vw, 72px);
}

.page-contact .scope-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .scope-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 4px 16px;
  padding: 20px 0;
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .scope-item:last-child {
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .scope-no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
  padding-top: 4px;
}

.page-contact .scope-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--c-text);
}

.page-contact .scope-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 纠错清单 ---------- */
.page-contact .checklist ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .check-item {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  background: rgba(29, 34, 51, 0.55);
  border: 1px solid var(--c-line-soft);
  cursor: pointer;
  transition: border-color 0.24s ease, background-color 0.24s ease;
}

.page-contact .check-item:hover {
  border-color: rgba(35, 211, 238, 0.45);
}

.page-contact .check-item input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .check-box {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--c-line);
  position: relative;
  transition: border-color 0.24s ease, background-color 0.24s ease;
}

.page-contact .check-item input:checked + .check-box {
  border-color: var(--c-lime);
  background: rgba(166, 255, 60, 0.14);
}

.page-contact .check-item input:checked + .check-box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 6px;
  height: 11px;
  border: 2px solid var(--c-lime);
  border-top: 0;
  border-left: 0;
  transform: rotate(42deg);
}

.page-contact .check-item input:focus-visible + .check-box {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-contact .check-item input:checked ~ .check-text {
  color: var(--c-text);
}

.page-contact .check-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .check-text strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-text);
  font-weight: 500;
}

.page-contact .check-ready {
  margin: 14px 0 0;
  padding: 12px 16px;
  border-left: 3px solid rgba(166, 255, 60, 0.4);
  background: rgba(166, 255, 60, 0.05);
  font-size: 14px;
  color: var(--c-muted);
  transition: opacity 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.page-contact .checklist:has(#ck-1:checked):has(#ck-2:checked):has(#ck-3:checked):has(#ck-4:checked) .check-ready {
  border-left-color: var(--c-lime);
  background: rgba(166, 255, 60, 0.12);
  color: var(--c-text);
}

.page-contact .checklist-foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 响应节奏 ---------- */
.page-contact .resp-grid {
  display: grid;
  gap: 14px;
}

.page-contact .resp-item {
  padding: 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-top: 2px solid rgba(35, 211, 238, 0.5);
}

.page-contact .resp-num {
  display: block;
  font-size: clamp(24px, 3.6vw, 34px);
  letter-spacing: -0.02em;
  color: var(--c-lime);
}

.page-contact .resp-label {
  display: block;
  margin: 8px 0 10px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-text);
}

.page-contact .resp-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .resp-foot {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-media {
  margin: 0 0 24px;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  overflow: hidden;
}

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

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

.page-contact .coop-item {
  padding: 22px var(--contact-pad);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  transition: border-color 0.26s ease, background-color 0.26s ease;
}

.page-contact .coop-item:hover {
  border-color: var(--c-cyan);
  background: rgba(29, 34, 51, 0.85);
}

.page-contact .coop-no {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-lime);
  border: 1px solid rgba(166, 255, 60, 0.35);
}

.page-contact .coop-item h3 {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--c-text);
}

.page-contact .coop-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact .coop-need {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  font-family: var(--f-mono);
  font-size: 12px !important;
  letter-spacing: 0.04em;
  color: var(--c-cyan) !important;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 760px) {
  .page-contact .resp-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-body__inner {
    grid-template-columns: minmax(268px, 0.78fr) minmax(0, 1.62fr);
    gap: clamp(40px, 4.6vw, 78px);
  }

  .page-contact .contact-rail__inner {
    position: sticky;
    top: var(--contact-sticky);
  }
}

@media (max-width: 420px) {
  .page-contact .contact-hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .page-contact .scope-item {
    grid-template-columns: 34px 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .contact-card::before,
  .page-contact .coop-item,
  .page-contact .check-ready {
    transition: none;
  }

  .page-contact .contact-card:hover {
    transform: none;
  }
}