.page-contact{
  --contact-space-sm:1rem;
  --contact-space-md:2rem;
  --contact-space-lg:4rem;
  background-color:var(--color-bg);
}

/* ===== 首屏 ===== */
.page-contact .contact-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--color-line);
}
.page-contact .contact-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(90deg,transparent 10%,#000 70%);
  pointer-events:none;
}
.page-contact .contact-hero__inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:2.25rem;
  padding:3.5rem 1.25rem 3rem;
  align-items:center;
}
.page-contact .contact-hero__crumb{
  display:inline-flex;
  align-items:center;
  padding:.4rem .8rem;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--color-accent);
  background:var(--color-accent-dim);
  border-left:2px solid var(--color-accent);
  margin-bottom:1.25rem;
}
.page-contact .contact-hero__content h1{
  font-family:var(--font-display);
  font-size:clamp(2.375rem,5vw,4rem);
  line-height:.96;
  letter-spacing:.012em;
  color:var(--color-text);
  margin:0 0 1.125rem;
  max-width:680px;
}
.page-contact .contact-hero__lead{
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.7;
  color:var(--color-text-dim);
  margin:0 0 1.5rem;
  max-width:560px;
}
.page-contact .contact-hero__anchors{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem;
}
.page-contact .contact-hero__facts{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;
  margin-top:2.25rem;
  background:var(--color-line);
  border:1px solid var(--color-line);
  max-width:520px;
}
.page-contact .hero-fact{
  background:var(--color-surface);
  padding:.875rem 1rem;
  display:flex;
  flex-direction:column;
  gap:.25rem;
  min-width:0;
}
.page-contact .hero-fact__num{
  font-family:var(--font-mono);
  font-size:1.25rem;
  font-weight:600;
  color:var(--color-accent);
  line-height:1.1;
}
.page-contact .hero-fact__label{
  font-family:var(--font-body);
  font-size:.75rem;
  color:var(--color-text-dim);
  letter-spacing:.05em;
}
.page-contact .contact-hero__media{
  position:relative;
  margin:0;
}
.page-contact .contact-hero__media img{
  display:block;
  width:100%;
  height:auto;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
  border:1px solid var(--color-line-accent);
  filter:saturate(1.12) contrast(1.06);
}
.page-contact .contact-hero__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,transparent 46%,rgba(0,255,156,.4) 46.2%,rgba(0,255,156,.4) 46.7%,transparent 47%);
  pointer-events:none;
}

/* ===== 联系通道区 ===== */
.page-contact .contact-channels{
  background:linear-gradient(180deg,var(--color-surface) 0%,var(--color-surface-light) 100%);
  padding:var(--contact-space-lg) 0;
}
.page-contact .contact-section-desc{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.65;
  color:var(--color-text-dim);
  margin:.75rem 0 0;
  max-width:520px;
}
.page-contact .contact-channels__layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:2.5rem;
  margin-top:2.5rem;
}
.page-contact .contact-channels__list{
  display:grid;
  gap:1.25rem;
  align-content:start;
}
.page-contact .channel-card{
  position:relative;
  background:var(--color-bg);
  padding:1.75rem 1.5rem 1.5rem;
  border-left:3px solid var(--color-accent);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
  transition:transform .3s ease,box-shadow .3s ease;
}
.page-contact .channel-card::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:48px;
  height:48px;
  background:linear-gradient(135deg,transparent 50%,rgba(138,155,181,.1) 50%);
}
.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within{
  transform:translateX(6px);
  box-shadow:0 14px 32px rgba(0,0,0,.28);
}
.page-contact .channel-card__tag{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--color-info);
  margin-bottom:.625rem;
}
.page-contact .channel-card__title{
  font-family:var(--font-display);
  font-size:1.5rem;
  letter-spacing:.02em;
  color:var(--color-text);
  margin:0 0 .75rem;
}
.page-contact .channel-card__value{
  font-family:var(--font-mono);
  font-size:clamp(1.125rem,2.4vw,1.625rem);
  font-weight:600;
  line-height:1.4;
  color:var(--color-accent);
  margin:0 0 .75rem;
  word-break:break-all;
  user-select:all;
  cursor:text;
}
.page-contact .channel-card__note{
  font-family:var(--font-body);
  font-size:.9375rem;
  line-height:1.65;
  color:var(--color-text-dim);
  margin:0 0 1rem;
}
.page-contact .channel-card__meta{
  margin:0;
  padding-top:.875rem;
  border-top:1px solid var(--color-line);
}
.page-contact .channel-meta{
  display:flex;
  justify-content:space-between;
  gap:1rem;
  padding:.375rem 0;
}
.page-contact .channel-meta dt{
  font-family:var(--font-body);
  font-size:.8125rem;
  color:var(--color-text-dim);
}
.page-contact .channel-meta dd{
  font-family:var(--font-mono);
  font-size:.8125rem;
  color:var(--color-text);
  margin:0;
  text-align:right;
  overflow-wrap:anywhere;
}
.page-contact .contact-channels__aside{
  display:flex;
  flex-direction:column;
  gap:1rem;
}
.page-contact .channel-map{
  position:relative;
  margin:0;
}
.page-contact .channel-map img{
  display:block;
  width:100%;
  height:auto;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%);
  border:1px solid var(--color-line);
}
.page-contact .channel-map__caption{
  display:flex;
  align-items:center;
  gap:.625rem;
  padding:.875rem 1rem;
  background:var(--color-bg);
  border-left:2px solid var(--color-accent);
}
.page-contact .channel-map__caption p{
  font-family:var(--font-body);
  font-size:.8125rem;
  line-height:1.5;
  color:var(--color-text-dim);
  margin:0;
}

/* ===== 反馈栏指南 ===== */
.page-contact .contact-guide{
  padding:var(--contact-space-lg) 0;
  background:var(--color-bg);
}
.page-contact .contact-guide__inner{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:2.5rem;
}
.page-contact .contact-guide__main h2{
  font-family:var(--font-display);
  font-size:clamp(1.875rem,3vw,2.625rem);
  color:var(--color-text);
  margin:.75rem 0 0;
}
.page-contact .contact-guide__lead{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.7;
  color:var(--color-text-dim);
  margin:1.25rem 0 0;
  max-width:640px;
}
.page-contact .contact-guide__steps{
  list-style:none;
  margin:2rem 0 0;
  padding:0;
  display:grid;
}
.page-contact .contact-guide__steps li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:1.25rem;
  padding:1.375rem 0;
  border-top:1px solid var(--color-line);
}
.page-contact .contact-guide__steps li:last-child{
  border-bottom:1px solid var(--color-line);
}
.page-contact .contact-guide__step-num{
  font-family:var(--font-mono);
  font-size:1.25rem;
  font-weight:600;
  line-height:1.3;
  color:var(--color-accent);
}
.page-contact .contact-guide__step-body h3{
  font-family:var(--font-display);
  font-size:1.375rem;
  letter-spacing:.02em;
  color:var(--color-text);
  margin:0 0 .375rem;
}
.page-contact .contact-guide__step-body p{
  font-family:var(--font-body);
  font-size:.9375rem;
  line-height:1.65;
  color:var(--color-text-dim);
  margin:0;
}
.page-contact .contact-guide__aside{
  display:flex;
}
.page-contact .contact-guide__card{
  display:flex;
  flex-direction:column;
  gap:1rem;
  width:100%;
  padding:2rem 1.75rem;
  background:var(--color-surface);
  border:1px solid var(--color-line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,18px 100%,0 calc(100% - 18px));
}
.page-contact .contact-guide__card-label{
  font-family:var(--font-mono);
  font-size:.8rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--color-info);
  margin:0 0 .5rem;
}
.page-contact .contact-guide__card .btn{
  width:100%;
  justify-content:center;
}
.page-contact .contact-guide__card-note{
  font-family:var(--font-body);
  font-size:.875rem;
  line-height:1.65;
  color:var(--color-text-dim);
  margin:.875rem 0 0;
  padding-top:1rem;
  border-top:1px solid var(--color-line);
}

/* ===== 桌面布局 ===== */
@media (min-width:900px){
  .page-contact .contact-hero__inner{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    gap:3rem;
    padding:6rem 1.25rem 4.5rem;
  }
  .page-contact .contact-channels{
    padding:5rem 0;
  }
  .page-contact .contact-channels__layout{
    grid-template-columns:minmax(0,1fr) minmax(0,.82fr);
    gap:3rem;
    align-items:start;
  }
  .page-contact .contact-guide{
    padding:5rem 0;
  }
  .page-contact .contact-guide__inner{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
    gap:4rem;
    align-items:start;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-contact .channel-card{
    transition:none;
  }
  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within{
    transform:none;
    box-shadow:none;
  }
}