.page-contact {
  --contact-cut: 20px;
  --contact-cut-sm: 14px;
  --contact-glow: drop-shadow(0 0 20px rgba(123, 92, 255, .45));
  --contact-cyan-glow: drop-shadow(0 0 16px rgba(51, 225, 222, .4));
}

/* ---------- 首屏分屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-contact .hero-copy {
  min-width: 0;
}

.page-contact .hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: 12px 0 16px;
  color: var(--white);
}

.page-contact .hero-copy .section-lede {
  max-width: 58ch;
}

/* ---------- 渠道卡片 ---------- */
.page-contact .channel-stack {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-contact .channel-card {
  position: relative;
  padding: 20px 22px 22px;
  background:
    linear-gradient(158deg, rgba(18, 31, 73, .95), rgba(10, 18, 48, .95));
  border: 1px solid var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--contact-cut)) 0,
    100% var(--contact-cut),
    100% 100%,
    var(--contact-cut) 100%,
    0 calc(100% - var(--contact-cut))
  );
  transition: border-color var(--dur) var(--ease), filter var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 74px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--violet);
  filter: var(--contact-glow);
  transform: translateY(-2px);
}

.page-contact .card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-contact .channel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .channel-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--violet);
  letter-spacing: .08em;
}

.page-contact .channel-value {
  margin: 12px 0 8px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--white);
  word-break: break-word;
}

.page-contact .channel-desc {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.page-contact .copy-hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ---------- 右侧坐标视觉区 ---------- */
.page-contact .coord-visual {
  position: relative;
  min-height: 320px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(
    0 0,
    calc(100% - 26px) 0,
    100% 26px,
    100% 100%,
    26px 100%,
    0 calc(100% - 26px)
  );
}

.page-contact .coord-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  opacity: .45;
  filter: saturate(.85) contrast(1.05);
}

.page-contact .coord-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.page-contact .coord-caption {
  position: absolute;
  inset: auto 0 0 0;
  margin: 0;
  padding: 22px 18px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  background: linear-gradient(to top, rgba(5, 9, 26, .94), rgba(5, 9, 26, 0));
}

/* ---------- 受理事由折叠清单 ---------- */
.page-contact .topic-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .topic-fold {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 31, 73, .72), rgba(10, 18, 48, .72));
  clip-path: polygon(
    0 0,
    calc(100% - var(--contact-cut-sm)) 0,
    100% var(--contact-cut-sm),
    100% 100%,
    var(--contact-cut-sm) 100%,
    0 calc(100% - var(--contact-cut-sm))
  );
  transition: border-color var(--dur) var(--ease);
}

.page-contact .topic-fold[open] {
  border-color: rgba(123, 92, 255, .65);
}

.page-contact .topic-fold .fold-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 16px 20px;
}

.page-contact .fold-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--white);
  flex: 1 1 auto;
}

.page-contact .topic-fold .fold-body {
  padding: 0 20px 18px;
}

.page-contact .topic-fold .fold-body p {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 9px 0;
  border-top: 1px dashed rgba(43, 58, 110, .9);
  font-size: 14px;
  line-height: 1.65;
}

.page-contact .meta-key {
  flex: 0 0 auto;
  min-width: 5em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-contact .meta-val {
  flex: 1 1 12ch;
  min-width: 0;
  color: var(--white);
}

/* ---------- 回复时效 ---------- */
.page-contact .response-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-contact .response-main {
  min-width: 0;
}

.page-contact .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.page-contact .stat-tile {
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 31, 73, .8), rgba(10, 18, 48, .8));
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-contact .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: .01em;
  color: var(--cyan);
}

.page-contact .stat-cap {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .prep-panel {
  border-left: 2px solid var(--violet);
}

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

.page-contact .prep-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .prep-tag {
  flex: 0 0 auto;
  padding: 3px 8px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: 2px;
}

.page-contact .response-media {
  margin: 0;
}

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

.page-contact .media-cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-contact .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .partner-cell {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(200deg, rgba(10, 18, 48, .95), rgba(18, 31, 73, .6));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--contact-cut-sm)), calc(100% - var(--contact-cut-sm)) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .partner-cell:hover {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-contact .partner-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--magenta);
  border: 1px solid rgba(255, 61, 154, .5);
  border-radius: 2px;
}

.page-contact .partner-cell h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--white);
}

.page-contact .partner-cell p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .partner-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 到访 ---------- */
.page-contact .visit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .visit-card {
  padding: 20px;
  border: 1px solid var(--line);
  background: rgba(18, 31, 73, .5);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut-sm)) 0, 100% var(--contact-cut-sm), 100% 100%, 0 100%);
}

.page-contact .visit-label {
  display: block;
  margin-bottom: 12px;
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .visit-address {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-size: 17px;
  line-height: 1.7;
  color: var(--white);
}

.page-contact .visit-steps {
  margin: 0;
  padding-left: 1.2em;
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .visit-card--note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .visit-card--note {
  border-left: 2px solid var(--amber);
}

/* ---------- 自助帮助 ---------- */
.page-contact .self-help-panel {
  padding: clamp(22px, 3.4vw, 38px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(123, 92, 255, .18), transparent 60%),
    linear-gradient(180deg, rgba(10, 18, 48, .95), rgba(5, 9, 26, .95));
  clip-path: polygon(
    0 0,
    calc(100% - 30px) 0,
    100% 30px,
    100% 100%,
    30px 100%,
    0 calc(100% - 30px)
  );
}

.page-contact .self-help-copy {
  max-width: 62ch;
  margin-bottom: 24px;
}

.page-contact .help-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .help-link {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: rgba(5, 9, 26, .6);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-contact .help-link:hover,
.page-contact .help-link:focus-visible {
  border-color: var(--violet);
  filter: var(--contact-cyan-glow);
  transform: translateX(4px);
}

.page-contact .help-kicker {
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-contact .help-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.45;
  color: var(--white);
}

.page-contact .help-desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .topic-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .visit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .visit-card--note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: clamp(30px, 4vw, 56px);
  }
  .page-contact .response-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
  .page-contact .visit-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, .9fr);
  }
  .page-contact .visit-card--note {
    grid-column: auto;
  }
}

@media (min-width: 1200px) {
  .page-contact .coord-visual {
    min-height: 460px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .partner-cell,
  .page-contact .help-link {
    transition: none;
    transform: none;
    filter: none;
  }
}
</main>