.page-contact{
  --ct-r:22px;
  --ct-gap:clamp(16px,2.6vw,28px);
  display:block;
  overflow-x:clip;
}

.page-contact [id]{scroll-margin-top:120px;}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs-wrap{padding-top:22px;}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero{
  padding-block:clamp(28px,5vw,58px) clamp(34px,5vw,68px);
  border-bottom:1px solid var(--line);
  background:radial-gradient(120% 150% at 0% 0%,rgba(41,240,220,.06),transparent 58%);
}
.page-contact .contact-hero h1{
  font-family:var(--font-display);
  font-weight:700;
  letter-spacing:-.02em;
  line-height:1.08;
  font-size:clamp(31px,5.8vw,66px);
  color:var(--ice);
  margin:14px 0 0;
  max-width:900px;
}
.page-contact .contact-hero__lede{
  max-width:62ch;
  margin:20px 0 0;
  color:var(--fog);
  font-size:clamp(15px,1.4vw,18px);
  line-height:1.78;
}
.page-contact .contact-chips{
  list-style:none;
  margin:26px 0 0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

/* ---------- 通用标题 ---------- */
.page-contact h2{
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.16;
  font-size:clamp(25px,3.5vw,40px);
  color:var(--ice);
  margin:10px 0 0;
}
.page-contact h3{
  font-size:16px;
  font-weight:600;
  color:var(--ice);
  margin:0;
  letter-spacing:.01em;
}
.page-contact .section-head{margin-bottom:clamp(20px,3vw,30px);}
.page-contact .section-head h2{max-width:24ch;}
.page-contact .section-head__note{
  margin:12px 0 0;
  color:var(--fog);
  font-size:15px;
  line-height:1.75;
  max-width:54ch;
}
.page-contact .mono{
  font-family:var(--font-mono);
  color:var(--cyan);
  overflow-wrap:anywhere;
}

/* ---------- 渠道总览 ---------- */
.page-contact .contact-channels{padding-block:clamp(42px,7vw,90px);}
.page-contact .contact-channels__grid{
  display:grid;
  gap:var(--ct-gap);
  align-items:start;
}
@media (min-width:960px){
  .page-contact .contact-channels__grid{
    grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
    gap:clamp(24px,3.5vw,48px);
  }
}
.page-contact .chan{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--ct-r);
  padding:clamp(18px,2.4vw,26px);
  transition:transform .15s ease,border-color .15s ease;
}
.page-contact .chan + .chan{margin-top:14px;}
.page-contact .chan:hover,
.page-contact .chan:focus-within{
  transform:translateY(-2px);
  border-color:var(--cyan);
}
.page-contact .chan__head{display:flex;align-items:center;gap:12px;}
.page-contact .chan__icon{
  width:38px;
  height:38px;
  flex:0 0 38px;
  display:grid;
  place-items:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--ink-900);
  color:var(--cyan);
}
.page-contact .chan__value{
  margin:16px 0 18px;
  font-family:var(--font-mono);
  font-size:clamp(17px,2.1vw,24px);
  letter-spacing:.015em;
  line-height:1.4;
  color:var(--cyan);
  overflow-wrap:anywhere;
}
.page-contact .chan__value--addr{
  font-family:var(--font-body);
  font-size:clamp(15px,1.5vw,18px);
  letter-spacing:0;
  line-height:1.65;
  color:var(--ice);
}
.page-contact .chan__meta{margin:0;display:grid;gap:9px;}
.page-contact .chan__meta > div{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.page-contact .chan__meta dt{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--fog-dim);
}
.page-contact .chan__meta dd{
  margin:0;
  font-size:14px;
  line-height:1.65;
  color:var(--fog);
}
.page-contact .contact-channels__media{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--ct-r);
  overflow:hidden;
  background:var(--panel);
}
.page-contact .contact-channels__media img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
}
.page-contact .contact-channels__media figcaption{
  padding:14px 18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--fog-dim);
}

/* ---------- 勘误说明 ---------- */
.page-contact .errata{
  background:var(--ink-850);
  border-block:1px solid var(--line);
  padding-block:clamp(44px,7vw,92px);
}
.page-contact .errata__grid{display:grid;gap:var(--ct-gap);}
@media (min-width:960px){
  .page-contact .errata__grid{
    grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);
    gap:clamp(24px,4vw,56px);
    align-items:center;
  }
}
.page-contact .errata__media{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--ct-r);
  overflow:hidden;
  background:var(--panel);
}
.page-contact .errata__media img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:3/2;
  object-fit:cover;
}
.page-contact .errata__body p{
  margin:16px 0 0;
  color:var(--fog);
  font-size:15.5px;
  line-height:1.8;
  max-width:58ch;
}
.page-contact .mail-example{
  margin:22px 0 0 !important;
  padding:16px 18px;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-left:4px solid var(--orange);
  border-radius:12px;
  font-family:var(--font-mono);
  font-size:clamp(12.5px,1.3vw,14px) !important;
  line-height:1.95;
  letter-spacing:.02em;
  color:var(--ice) !important;
  overflow-wrap:anywhere;
}
.page-contact .errata__points{
  list-style:none;
  margin:22px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.page-contact .errata__points li{
  position:relative;
  padding-left:18px;
  color:var(--fog);
  font-size:15px;
  line-height:1.72;
}
.page-contact .errata__points li::before{
  content:"";
  position:absolute;
  left:0;
  top:.62em;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
}
.page-contact .errata__points strong{color:var(--ice);font-weight:600;}
.page-contact .errata__body .btn{margin-top:26px;}

/* ---------- 合作共建 ---------- */
.page-contact .coop{padding-block:clamp(44px,7vw,92px);}
.page-contact .coop__grid{display:grid;gap:14px;}
@media (min-width:760px){
  .page-contact .coop__grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
}
.page-contact .coop__item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--ct-r);
  padding:clamp(18px,2.4vw,26px);
  transition:transform .15s ease,border-color .15s ease;
}
.page-contact .coop__item:hover{transform:translateY(-2px);border-color:var(--cyan);}
.page-contact .coop__num{
  display:inline-grid;
  place-items:center;
  width:30px;
  height:30px;
  border-radius:9px;
  background:var(--ink-900);
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--orange);
  margin-bottom:14px;
}
.page-contact .coop__item p{
  margin:10px 0 0;
  color:var(--fog);
  font-size:14.5px;
  line-height:1.78;
}
.page-contact .coop__note{
  margin:24px 0 0;
  color:var(--fog);
  font-size:14.5px;
  line-height:1.85;
  max-width:66ch;
}
.page-contact .coop__note a{
  color:var(--cyan);
  text-decoration:underline;
  text-underline-offset:3px;
}

/* ---------- 响应节奏 ---------- */
.page-contact .rhythm{
  background:var(--ink-850);
  border-block:1px solid var(--line);
  padding-block:clamp(44px,7vw,92px);
}
.page-contact .rhythm__grid{display:grid;gap:var(--ct-gap);}
@media (min-width:960px){
  .page-contact .rhythm__grid{
    grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
    gap:clamp(24px,4vw,56px);
    align-items:start;
  }
}
.page-contact .rhythm__body p{
  margin:16px 0 0;
  color:var(--fog);
  font-size:15.5px;
  line-height:1.82;
  max-width:58ch;
}
.page-contact .rhythm__body a{
  color:var(--cyan);
  text-decoration:underline;
  text-underline-offset:3px;
}
.page-contact .rhythm__stats{display:grid;gap:12px;}
.page-contact .rcard{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px 20px;
  display:grid;
  gap:6px;
}
.page-contact .rcard__val{
  font-family:var(--font-mono);
  font-size:clamp(20px,2.6vw,30px);
  letter-spacing:.02em;
  color:var(--cyan);
  line-height:1.2;
}
.page-contact .rcard:nth-child(2) .rcard__val{color:var(--orange);}
.page-contact .rcard:nth-child(3) .rcard__val{color:var(--green);}
.page-contact .rcard__lab{
  font-size:13px;
  letter-spacing:.04em;
  color:var(--fog-dim);
}

/* ---------- 提交提示 ---------- */
.page-contact .tips{padding-block:clamp(44px,7vw,92px);}
.page-contact .steps{display:grid;gap:12px;}
@media (min-width:820px){
  .page-contact .steps{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:16px;
    align-items:start;
  }
}
.page-contact .step{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--ct-r);
  overflow:hidden;
  transition:border-color .15s ease;
}
.page-contact .step:hover{border-color:var(--cyan);}
.page-contact .step__sum{
  display:flex;
  align-items:center;
  gap:12px;
  padding:16px 18px;
  cursor:pointer;
  list-style:none;
}
.page-contact .step__sum::-webkit-details-marker{display:none;}
.page-contact .step__num{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--ink-900);
  background:var(--cyan);
  border-radius:8px;
  padding:4px 8px;
}
.page-contact .step__title{font-size:15px;font-weight:600;color:var(--ice);}
.page-contact .step__plus{
  margin-left:auto;
  position:relative;
  width:12px;
  height:12px;
  flex:0 0 12px;
}
.page-contact .step__plus::before,
.page-contact .step__plus::after{
  content:"";
  position:absolute;
  background:var(--fog);
  border-radius:2px;
}
.page-contact .step__plus::before{left:0;top:5px;width:12px;height:2px;}
.page-contact .step__plus::after{left:5px;top:0;width:2px;height:12px;transition:transform .2s ease;}
.page-contact .step[open] .step__plus::after{transform:scaleY(0);}
.page-contact .step__body{
  margin:0;
  padding:0 18px 18px;
  color:var(--fog);
  font-size:14.5px;
  line-height:1.78;
}
.page-contact .tips__note{
  margin:26px 0 0;
  color:var(--fog-dim);
  font-size:14px;
  line-height:1.85;
  max-width:60ch;
}
.page-contact .tips__note a{
  color:var(--cyan);
  text-decoration:underline;
  text-underline-offset:3px;
}

/* ---------- 收束 ---------- */
.page-contact .contact-close{padding-block:clamp(40px,6vw,80px);}
.page-contact .contact-close__panel{
  position:relative;
  overflow:hidden;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:26px;
  padding:clamp(24px,4vw,48px);
}
.page-contact .contact-close__panel::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:5px;
  background:var(--cyan);
}
.page-contact .contact-close__lede{
  margin:16px 0 0;
  color:var(--fog);
  font-size:15.5px;
  line-height:1.8;
  max-width:56ch;
}
.page-contact .contact-close__panel .btn{margin-top:26px;}
.page-contact .contact-close__icp{
  margin:22px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--fog-dim);
}

/* ---------- 底部色带 ---------- */
.page-contact .contact-band{
  display:flex;
  width:100%;
  height:10px;
}
.page-contact .contact-band__seg{display:block;height:100%;}
.page-contact .contact-band__seg--cyan{flex:0 0 22%;background:var(--cyan);}
.page-contact .contact-band__seg--orange{flex:0 0 12%;background:var(--orange);}
.page-contact .contact-band__seg--line{flex:1 1 auto;background:var(--line);}

@media (prefers-reduced-motion:reduce){
  .page-contact .chan,
  .page-contact .coop__item,
  .page-contact .step,
  .page-contact .step__plus::after{transition:none;}
  .page-contact .chan:hover,
  .page-contact .chan:focus-within,
  .page-contact .coop__item:hover{transform:none;}
}