.page-contact {
  --contact-red: #E53935;
  --contact-blue: #1E88E5;
  --contact-yellow: #FFC107;
  --contact-bg-dark: #212121;
  --contact-bg-card: #2C2C2C;
  --contact-text-primary: #FFFFFF;
  --contact-text-secondary: #B0BEC5;
  --contact-font-heading: Impact, 'Montserrat Black', sans-serif;
  --contact-font-body: Inter, system-ui, sans-serif;
  --contact-card-radius: 4px;
  --contact-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--contact-bg-dark);
  color: var(--contact-text-primary);
  font-family: var(--contact-font-body);
  overflow: hidden;
  padding: 80px 20px 60px;
}

/* ===== 热力图背景 ===== */
.heatmap-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.heatmap-bg__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.heatmap-bg__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 22% 38%, rgba(229, 57, 53, 0.35) 0%, transparent 55%),
    radial-gradient(circle at 78% 62%, rgba(30, 136, 229, 0.35) 0%, transparent 55%),
    radial-gradient(circle at 50% 50%, rgba(255, 193, 7, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 10% 85%, rgba(229, 57, 53, 0.20) 0%, transparent 45%),
    radial-gradient(circle at 90% 15%, rgba(30, 136, 229, 0.20) 0%, transparent 45%);
  animation: heatwave 12s ease-in-out infinite alternate;
}

@keyframes heatwave {
  0% {
    background:
      radial-gradient(circle at 22% 38%, rgba(229, 57, 53, 0.35) 0%, transparent 55%),
      radial-gradient(circle at 78% 62%, rgba(30, 136, 229, 0.35) 0%, transparent 55%),
      radial-gradient(circle at 50% 50%, rgba(255, 193, 7, 0.12) 0%, transparent 40%),
      radial-gradient(circle at 10% 85%, rgba(229, 57, 53, 0.20) 0%, transparent 45%),
      radial-gradient(circle at 90% 15%, rgba(30, 136, 229, 0.20) 0%, transparent 45%);
  }
  33% {
    background:
      radial-gradient(circle at 35% 22%, rgba(30, 136, 229, 0.35) 0%, transparent 50%),
      radial-gradient(circle at 65% 78%, rgba(229, 57, 53, 0.35) 0%, transparent 50%),
      radial-gradient(circle at 50% 50%, rgba(255, 193, 7, 0.15) 0%, transparent 35%),
      radial-gradient(circle at 85% 10%, rgba(30, 136, 229, 0.20) 0%, transparent 40%),
      radial-gradient(circle at 15% 90%, rgba(229, 57, 53, 0.20) 0%, transparent 40%);
  }
  66% {
    background:
      radial-gradient(circle at 68% 32%, rgba(229, 57, 53, 0.30) 0%, transparent 52%),
      radial-gradient(circle at 32% 68%, rgba(30, 136, 229, 0.30) 0%, transparent 52%),
      radial-gradient(circle at 50% 50%, rgba(255, 193, 7, 0.10) 0%, transparent 38%),
      radial-gradient(circle at 5% 45%, rgba(229, 57, 53, 0.25) 0%, transparent 42%),
      radial-gradient(circle at 95% 55%, rgba(30, 136, 229, 0.25) 0%, transparent 42%);
  }
  100% {
    background:
      radial-gradient(circle at 42% 68%, rgba(30, 136, 229, 0.35) 0%, transparent 54%),
      radial-gradient(circle at 58% 32%, rgba(229, 57, 53, 0.35) 0%, transparent 54%),
      radial-gradient(circle at 50% 50%, rgba(255, 193, 7, 0.14) 0%, transparent 36%),
      radial-gradient(circle at 75% 88%, rgba(229, 57, 53, 0.18) 0%, transparent 44%),
      radial-gradient(circle at 25% 12%, rgba(30, 136, 229, 0.18) 0%, transparent 44%);
  }
}

.heatmap-bg__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ===== 面包屑 ===== */
.breadcrumbs {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 880px;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--contact-text-secondary);
  font-family: var(--contact-font-body);
  letter-spacing: 0.3px;
}

.breadcrumbs__link {
  color: var(--contact-text-secondary);
  text-decoration: none;
  transition: color var(--contact-transition);
  border-bottom: 1px solid transparent;
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--contact-red);
  border-bottom-color: var(--contact-red);
}

.breadcrumbs__sep {
  color: var(--contact-text-secondary);
  opacity: 0.5;
}

.breadcrumbs__current {
  color: var(--contact-text-primary);
  font-weight: 600;
}

/* ===== 主内容区 ===== */
.contact-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 880px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* ===== 标题 ===== */
.contact-header {
  margin-bottom: 48px;
}

.contact-title {
  font-family: var(--contact-font-heading);
  font-size: clamp(40px, 10vw, 72px);
  font-weight: 900;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: -0.5px;
  color: var(--contact-text-primary);
  margin: 0 0 12px;
  transform: skewX(-8deg);
  display: inline-block;
}

.text-accent {
  color: var(--contact-red);
  display: inline-block;
  background: linear-gradient(135deg, var(--contact-red), var(--contact-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-subtitle {
  font-family: var(--contact-font-body);
  font-size: clamp(16px, 3vw, 22px);
  font-weight: 400;
  color: var(--contact-text-secondary);
  letter-spacing: 2px;
  margin: 0;
  text-transform: uppercase;
  border-top: 2px solid var(--contact-red);
  padding-top: 14px;
  display: inline-block;
}

/* ===== 联系卡片 ===== */
.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 560px;
  margin-bottom: 28px;
}

.contact-card {
  background: var(--contact-bg-card);
  border-radius: var(--contact-card-radius);
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform var(--contact-transition), box-shadow var(--contact-transition), border-color var(--contact-transition);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--card-line, var(--contact-red));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--contact-transition);
}

.contact-card:hover,
.contact-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

.contact-card:hover::before,
.contact-card:focus-within::before {
  transform: scaleX(1);
}

.contact-card--email {
  --card-line: var(--contact-red);
  border-left: 3px solid var(--contact-red);
}

.contact-card--phone {
  --card-line: var(--contact-blue);
  border-left: 3px solid var(--contact-blue);
}

.contact-card--address {
  --card-line: var(--contact-yellow);
  border-left: 3px solid var(--contact-yellow);
}

.contact-card__icon {
  font-size: 32px;
  line-height: 1;
  margin-bottom: 10px;
  display: block;
}

.contact-card__label {
  font-family: var(--contact-font-body);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--contact-text-secondary);
  margin: 0 0 8px;
}

.contact-card__value {
  font-family: var(--contact-font-body);
  font-size: clamp(17px, 3.6vw, 22px);
  font-weight: 500;
  color: var(--contact-text-primary);
  text-decoration: none;
  transition: color var(--contact-transition);
  word-break: break-all;
}

.contact-card__value--text {
  word-break: normal;
}

a.contact-card__value:hover,
a.contact-card__value:focus-visible {
  color: var(--contact-red);
  text-decoration: underline;
}

/* ===== 辅助说明 ===== */
.contact-note {
  font-size: 14px;
  color: var(--contact-text-secondary);
  margin: 0 0 36px;
  padding: 12px 24px;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--contact-card-radius);
  background: rgba(0, 0, 0, 0.2);
}

/* ===== 操作按钮 ===== */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.contact-actions .btn {
  font-family: var(--contact-font-body);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: var(--contact-card-radius);
  text-decoration: none;
  transition: transform var(--contact-transition), box-shadow var(--contact-transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.5px;
  border: none;
  cursor: pointer;
  transform: skewX(-4deg);
}

.contact-actions .btn--primary {
  background: var(--contact-red);
  color: #fff;
}

.contact-actions .btn--secondary {
  background: var(--contact-blue);
  color: #fff;
}

.contact-actions .btn:hover,
.contact-actions .btn:focus-visible {
  transform: skewX(-4deg) translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.contact-actions .btn:active {
  transform: skewX(-4deg) translateY(0);
}

/* ===== 装饰图片 ===== */
.contact-deco {
  position: relative;
  z-index: 2;
  margin-top: 48px;
  width: 100%;
  max-width: 240px;
  opacity: 0.6;
  transition: opacity var(--contact-transition);
}

.contact-deco:hover {
  opacity: 0.9;
}

.contact-deco__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--contact-card-radius);
  border: 1px solid rgba(255, 255, 255, 0.06);
  display: block;
}

/* ===== 桌面端 - 非对称增强 ===== */
@media (min-width: 768px) {
  .page-contact {
    padding: 100px 40px 80px;
  }

  .breadcrumbs {
    max-width: 1080px;
    margin-bottom: 40px;
    font-size: 14px;
  }

  .contact-content {
    max-width: 1080px;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    text-align: left;
    gap: 0;
  }

  .contact-header {
    flex: 0 0 100%;
    margin-bottom: 56px;
    text-align: left;
  }

  .contact-title {
    font-size: clamp(56px, 6vw, 88px);
    transform: skewX(-10deg);
  }

  .contact-subtitle {
    font-size: clamp(18px, 2vw, 24px);
    padding-top: 16px;
  }

  .contact-cards {
    flex: 0 0 60%;
    max-width: 600px;
    margin-bottom: 0;
    gap: 24px;
  }

  .contact-card {
    padding: 28px 36px;
    flex-direction: row;
    text-align: left;
    gap: 20px;
    align-items: center;
  }

  .contact-card__icon {
    font-size: 36px;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .contact-card__label {
    margin-bottom: 2px;
    font-size: 12px;
  }

  .contact-card__value {
    font-size: clamp(18px, 2vw, 24px);
  }

  .contact-note {
    flex: 0 0 100%;
    max-width: 600px;
    margin-top: 32px;
    margin-bottom: 0;
    text-align: center;
  }

  .contact-actions {
    flex: 0 0 100%;
    justify-content: flex-start;
    margin-top: 36px;
  }

  .contact-deco {
    flex: 0 0 32%;
    max-width: 320px;
    margin-top: 0;
    margin-left: auto;
    align-self: flex-end;
    position: relative;
    top: -20px;
  }
}

@media (min-width: 1024px) {
  .page-contact {
    padding: 120px 60px 100px;
  }

  .contact-cards {
    flex: 0 0 55%;
    gap: 28px;
  }

  .contact-deco {
    flex: 0 0 35%;
    max-width: 380px;
    top: -40px;
  }

  .contact-card {
    padding: 32px 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .heatmap-bg__overlay {
    animation: none;
  }

  .contact-card,
  .contact-actions .btn {
    transition: none;
  }

  .contact-card:hover,
  .contact-card:focus-within {
    transform: none;
  }

  .contact-actions .btn:hover,
  .contact-actions .btn:focus-visible {
    transform: none;
  }
}