/* ========== 联系通道 / page-contact ========== */

.page-contact {
  background: var(--dark-background);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 面包屑 */
.page-contact .breadcrumb {
  padding: 1.75rem 0 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.page-contact .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus {
  color: var(--neon-green);
}

/* 首屏区域 */
.page-contact .contact-hero {
  background:
    radial-gradient(circle at 82% 16%, rgba(57, 255, 136, 0.16) 0%, transparent 32%),
    radial-gradient(circle at 6% 74%, rgba(255, 122, 24, 0.14) 0%, transparent 28%),
    linear-gradient(135deg, var(--deep-space), var(--dark-background) 80%);
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border-line);
}

.page-contact .contact-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: end;
}

.page-contact .contact-hero-copy h1 {
  margin: 0.5rem 0 1rem;
  max-width: 16em;
  font-family: var(--heading-family);
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text-light);
}

.page-contact .contact-hero-desc {
  margin: 0;
  max-width: 44rem;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.75;
}

.page-contact .contact-hero-tags {
  display: grid;
  gap: 0.5rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--border-line);
}

.page-contact .hero-tag {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.625rem 0.375rem;
  color: var(--text-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 74, 125, 0.65);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.page-contact .hero-tag:hover,
.page-contact .hero-tag:focus {
  background: rgba(57, 255, 136, 0.08);
  color: var(--neon-green);
}

.page-contact .hero-tag-num {
  font-family: var(--heading-family);
  font-weight: 700;
  color: var(--orange-red);
}

/* 左右分屏主体 */
.page-contact .contact-split {
  padding: 3.5rem 0 3rem;
  background-image:
    radial-gradient(circle, rgba(57, 255, 136, 0.06) 1px, transparent 1px),
    radial-gradient(circle, rgba(255, 122, 24, 0.045) 1px, transparent 1px);
  background-size: 30px 30px, 30px 30px;
  background-position: 0 0, 15px 15px;
}

.page-contact .contact-split-inner {
  display: grid;
  gap: 2.5rem;
}

.page-contact .contact-card-col,
.page-contact .feedback-col {
  min-width: 0;
}

/* 左侧联系卡 */
.page-contact .contact-card {
  background: linear-gradient(180deg, rgba(57, 255, 136, 0.05), var(--deep-space) 34%);
  border: 1px solid var(--border-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 0.85rem), 0 100%);
}

.page-contact .contact-card-media {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-line);
}

.page-contact .contact-map-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-contact .media-chip {
  position: absolute;
  left: 0.85rem;
  bottom: 0.85rem;
  background: var(--dark-background);
  color: var(--neon-green);
  border: 1px solid var(--border-line);
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
}

.page-contact .contact-card-body {
  padding: 1.5rem 1.25rem 1.75rem;
}

.page-contact .contact-card h2,
.page-contact .feedback-panel h2 {
  margin: 0.25rem 0 1.25rem;
  font-family: var(--heading-family);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.01em;
}

.page-contact .contact-channel-list {
  margin: 0 0 1.25rem;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-contact .channel-item {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.875rem;
  padding: 1.125rem 0;
  border-bottom: 1px dashed var(--border-line);
}

.page-contact .channel-item:last-child {
  border-bottom: 0;
}

.page-contact .channel-icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--border-line);
  background: rgba(57, 255, 136, 0.06);
  color: var(--neon-green);
  font-style: normal;
  font-size: 1.05rem;
}

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

.page-contact .contact-label {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-contact .channel-value {
  display: block;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-light);
  word-break: break-word;
}

.page-contact .channel-desc {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.page-contact .contact-note-box {
  margin-top: 1rem;
  background: rgba(255, 122, 24, 0.08);
  border-left: 3px solid var(--orange-red);
  padding: 0.875rem 1rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-contact .contact-note-box strong,
.page-contact .feedback-lead strong {
  color: var(--neon-green);
}

/* 右侧反馈面板 */
.page-contact .feedback-panel {
  position: relative;
  background: var(--deep-space);
  border: 1px solid var(--border-line);
  padding: 1.75rem 1.25rem 2rem;
  clip-path: polygon(0 0.85rem, 100% 0, 100% 100%, 0 100%);
}

.page-contact .feedback-visual {
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.page-contact .feedback-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 12rem;
  margin-left: auto;
  border: 1px solid var(--border-line);
  opacity: 0.9;
}

.page-contact .feedback-lead {
  margin: 0 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.975rem;
  line-height: 1.7;
}

.page-contact .feedback-guide {
  display: grid;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
}

.page-contact .guide-row {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.875rem 1rem;
  background: rgba(5, 11, 24, 0.55);
  border: 1px solid var(--border-line);
}

.page-contact .guide-index {
  font-family: var(--heading-family);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--orange-red);
}

.page-contact .guide-copy {
  display: grid;
  gap: 0.2rem;
}

.page-contact .guide-label {
  color: var(--text-light);
  font-weight: 600;
  font-size: 0.9375rem;
}

.page-contact .guide-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.55;
}

.page-contact .feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* 响应时间与边界 */
.page-contact .response-section {
  background: var(--light-background);
  color: var(--deep-space);
  padding: 3.75rem 0 4rem;
}

.page-contact .response-head {
  margin-bottom: 2rem;
}

.page-contact .response-head h2 {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--heading-family);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.page-contact .response-desc {
  margin: 0;
  max-width: 40rem;
  color: var(--gray-text);
  line-height: 1.7;
}

.page-contact .response-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.page-contact .response-card {
  background: var(--text-light);
  border: 1px solid rgba(46, 74, 125, 0.5);
  padding: 1.5rem 1.25rem;
  box-shadow: 0 10px 24px rgba(11, 29, 58, 0.06);
}

.page-contact .response-num {
  display: inline-block;
  padding: 0.4rem 0.625rem;
  background: var(--deep-space);
  color: var(--neon-green);
  font-family: var(--heading-family);
  font-weight: 700;
  font-size: 1.625rem;
  line-height: 1;
}

.page-contact .response-card h3 {
  margin: 0.875rem 0 0.5rem;
  color: var(--deep-space);
  font-family: var(--heading-family);
  font-size: 1.125rem;
}

.page-contact .response-card p {
  margin: 0;
  color: var(--gray-text);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-contact .boundary-note {
  margin-top: 1rem;
  background: var(--dark-background);
  color: var(--text-light);
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--border-line);
}

.page-contact .boundary-note-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.125rem;
}

.page-contact .boundary-note-head h3 {
  margin: 0;
  color: var(--text-light);
  font-family: var(--heading-family);
  font-size: 1.15rem;
}

.page-contact .tag-dark {
  background: rgba(57, 255, 136, 0.1);
  color: var(--neon-green);
  border: 1px solid var(--border-line);
}

.page-contact .boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.875rem;
}

.page-contact .boundary-list li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-contact .boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.625rem;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--neon-green);
  transform: skewX(-20deg);
}

.page-contact .boundary-list a {
  color: var(--neon-green);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-contact .boundary-list strong {
  color: var(--text-light);
}

/* 中等屏幕 */
@media (min-width: 640px) {
  .page-contact .contact-card-body {
    padding: 1.75rem 1.5rem 2rem;
  }

  .page-contact .feedback-panel {
    padding: 2rem 1.5rem 2.25rem;
  }

  .page-contact .feedback-visual img {
    max-width: 14rem;
  }

  .page-contact .boundary-note {
    padding: 1.75rem 1.5rem 1.875rem;
  }
}

/* 桌面端 */
@media (min-width: 961px) {
  .page-contact .contact-hero {
    padding: 4rem 0 2.5rem;
  }

  .page-contact .contact-hero-grid {
    grid-template-columns: 1.6fr 1fr;
    gap: 3rem;
  }

  .page-contact .contact-split {
    padding: 4rem 0;
  }

  .page-contact .contact-split-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-contact .response-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}