.page-contact {
  --contact-gold-glow: rgba(255, 215, 0, 0.15);
  --contact-red-flare: rgba(220, 20, 60, 0.25);
  --contact-card-radius: 6px;
  --contact-card-w: min(360px, 100%);
  --contact-transition-speed: 0.55s;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  padding: 0 var(--container-padding) 60px;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ── 面包屑 ── */
.page-contact .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 16px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  max-width: 1200px;
  margin: 0 auto;
}
.page-contact .breadcrumb a {
  color: var(--color-accent-gold);
  text-decoration: none;
  transition: color 0.2s;
}
.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--color-primary);
  outline: none;
}
.page-contact .breadcrumb__sep {
  color: var(--color-border);
  font-weight: 300;
}

/* ── Hero 区 ── */
.page-contact__hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 30px 20px;
  max-width: 1200px;
  margin: 0 auto 48px;
  position: relative;
}
.page-contact__hero::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-gold), var(--color-accent-blue), transparent);
  opacity: 0.5;
}
.page-contact__hero-text {
  flex: 1 1 260px;
}
.page-contact__hero-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.7;
  letter-spacing: 2px;
}
.page-contact__hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 4px 0 12px;
  color: var(--color-text);
  text-transform: uppercase;
}
.page-contact__hero-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 400px;
  line-height: 1.6;
}
.page-contact__hero-visual {
  flex: 0 0 auto;
  width: min(400px, 100%);
  transform: rotate(2deg) scale(1.02);
  border: 2px solid var(--color-accent-gold);
  box-shadow: 8px 8px 0 var(--contact-red-flare);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-contact__hero-visual:hover {
  transform: rotate(0deg) scale(1.04);
  box-shadow: 12px 12px 0 var(--contact-gold-glow);
}
.page-contact__hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* ── 卡片容器 ── */
.page-contact__cards {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px 30px;
  padding: 20px 0 30px;
}

/* ── 动态连接线（桌面） ── */
.page-contact__lines {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}
.page-contact__line {
  position: absolute;
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-primary), var(--color-accent-blue));
  opacity: 0.25;
  border-radius: 2px;
  transform-origin: left center;
  animation: contactLinePulse 3s ease-in-out infinite alternate;
}
.page-contact__line--1 {
  width: 120px;
  height: 2px;
  top: 18%;
  left: 20%;
  transform: rotate(18deg);
  animation-delay: 0s;
}
.page-contact__line--2 {
  width: 160px;
  height: 2px;
  top: 52%;
  left: 48%;
  transform: rotate(-12deg);
  animation-delay: 0.6s;
}
.page-contact__line--3 {
  width: 90px;
  height: 2px;
  top: 78%;
  left: 15%;
  transform: rotate(25deg);
  animation-delay: 1.2s;
}
@keyframes contactLinePulse {
  0% { opacity: 0.15; transform: scaleX(0.8) rotate(18deg); }
  100% { opacity: 0.45; transform: scaleX(1.2) rotate(18deg); }
}

/* ── 单张名片卡片 ── */
.contact-card {
  flex: 0 0 var(--contact-card-w);
  position: relative;
  z-index: 1;
  perspective: 1200px;
}
.contact-card:nth-child(2) { transform: translateY(8px) rotate(-1.5deg); }
.contact-card:nth-child(3) { transform: translateY(-6px) rotate(1.2deg); }
.contact-card:nth-child(4) { transform: translateY(12px) rotate(-0.8deg); }

.contact-card__toggle {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.contact-card__label {
  display: block;
  cursor: pointer;
  outline: none;
  border-radius: var(--contact-card-radius);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.contact-card__label:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 4px;
}
.contact-card__label:hover {
  transform: scale(1.02);
}

.contact-card__inner {
  position: relative;
  width: 100%;
  min-height: 320px;
  transition: transform var(--contact-transition-speed) cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
  border: 2px solid var(--color-accent-gold);
  border-radius: var(--contact-card-radius);
  background: var(--color-surface);
  box-shadow: 6px 6px 0 rgba(220, 20, 60, 0.3), 0 0 30px var(--contact-gold-glow);
}

.contact-card__toggle:checked + .contact-card__label .contact-card__inner {
  transform: rotateY(180deg);
}

.contact-card__front,
.contact-card__back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  min-height: 320px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px 24px;
  border-radius: var(--contact-card-radius);
  box-sizing: border-box;
}

.contact-card__front {
  background: var(--color-surface);
  background-image: radial-gradient(circle at 85% 20%, var(--contact-red-flare) 0%, transparent 60%);
}

.contact-card__back {
  background: var(--color-surface);
  background-image: linear-gradient(135deg, rgba(220,20,60,0.12), rgba(0,191,255,0.08));
  transform: rotateY(180deg);
  justify-content: center;
  text-align: center;
  border: 2px solid var(--color-accent-blue);
  border-radius: var(--contact-card-radius);
}

.contact-card__number {
  position: absolute;
  top: 10px;
  left: 14px;
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.25;
  letter-spacing: 1px;
  pointer-events: none;
}

.contact-card__title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-card__icon-wrap {
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card__icon {
  display: block;
  width: 80px;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 6px;
  background: rgba(255,255,255,0.03);
}
.contact-card__svg-icon {
  display: block;
  width: 64px;
  height: auto;
}

.contact-card__info {
  margin: 4px 0 10px;
  text-align: center;
}
.contact-card__link {
  color: var(--color-accent-gold);
  text-decoration: none;
  font-size: 1.05rem;
  word-break: break-all;
  font-weight: 500;
  transition: color 0.2s;
}
.contact-card__link:hover,
.contact-card__link:focus-visible {
  color: var(--color-primary);
  outline: none;
}
.contact-card__phone {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--color-text);
  letter-spacing: 0.5px;
  background: rgba(0,0,0,0.3);
  padding: 4px 14px;
  border-radius: 4px;
  border-left: 3px solid var(--color-accent-gold);
}
.contact-card__address {
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.5;
  display: inline-block;
  background: rgba(0,0,0,0.2);
  padding: 6px 14px;
  border-radius: 4px;
  border-left: 3px solid var(--color-accent-blue);
}

.contact-card__hint {
  font-size: 0.75rem;
  color: var(--color-accent-blue);
  opacity: 0.7;
  margin-top: 12px;
  letter-spacing: 0.5px;
  border-bottom: 1px dashed var(--color-accent-blue);
  padding-bottom: 2px;
}

.contact-card__back-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 280px;
  margin: 0 auto;
  padding: 10px;
}

/* ── 底部注脚 ── */
.page-contact__footnote {
  max-width: 1200px;
  margin: 20px auto 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  padding-top: 28px;
}
.page-contact__footnote-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}
.page-contact__footnote-link {
  color: var(--color-accent-gold);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.page-contact__footnote-link:hover,
.page-contact__footnote-link:focus-visible {
  color: var(--color-primary);
  outline: none;
}

/* ── 移动端 (默认已移动优先，此处补充窄屏调校) ── */
@media (max-width: 600px) {
  .page-contact {
    padding: 0 12px 40px;
  }
  .page-contact__hero {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    margin-bottom: 32px;
  }
  .page-contact__hero-visual {
    width: 100%;
    transform: rotate(0deg) scale(1);
    box-shadow: 4px 4px 0 var(--contact-red-flare);
  }
  .page-contact__hero-visual:hover {
    transform: scale(1.02);
    box-shadow: 6px 6px 0 var(--contact-gold-glow);
  }
  .page-contact__hero-number {
    font-size: 2.8rem;
  }
  .page-contact__hero-title {
    font-size: 1.8rem;
  }
  .page-contact__cards {
    gap: 28px 0;
    padding: 10px 0;
  }
  .contact-card {
    flex: 0 0 100%;
  }
  .contact-card:nth-child(2),
  .contact-card:nth-child(3),
  .contact-card:nth-child(4) {
    transform: none;
  }
  .contact-card__inner {
    min-height: 270px;
  }
  .contact-card__front,
  .contact-card__back {
    min-height: 270px;
    padding: 24px 18px;
  }
  .contact-card__number {
    font-size: 2.6rem;
  }
  .contact-card__title {
    font-size: 1.3rem;
    margin-bottom: 12px;
  }
  .contact-card__icon {
    width: 60px;
  }
  .contact-card__svg-icon {
    width: 48px;
  }
  .contact-card__hint {
    font-size: 0.7rem;
  }
  .page-contact__footnote {
    padding-top: 20px;
  }
}

/* ── 桌面增强 ── */
@media (min-width: 768px) {
  .page-contact__lines {
    display: block;
  }
  .page-contact__cards {
    justify-content: space-between;
    gap: 20px;
  }
  .contact-card {
    flex: 0 1 calc(33.33% - 20px);
  }
}

@media (min-width: 1024px) {
  .page-contact__hero-number {
    font-size: 5rem;
  }
  .contact-card__inner {
    min-height: 350px;
  }
  .contact-card__front,
  .contact-card__back {
    min-height: 350px;
    padding: 36px 28px;
  }
  .contact-card__number {
    font-size: 3.8rem;
  }
  .contact-card__title {
    font-size: 1.8rem;
  }
}