.page-contact{
  --ct-gap: clamp(1.25rem, 3vw, 2.25rem);
  --ct-block: clamp(3rem, 7vw, 6rem);
  background: var(--space);
  color: var(--muted);
  overflow-x: hidden;
  overflow-x: clip;
}

.page-contact .breadcrumbs{
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .headline{
  margin: 0 0 1.25rem;
}

/* ---------- 首屏框景 ---------- */
.contact-hero{
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.contact-frame{
  position: relative;
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(130% 120% at 4% -10%, rgba(108, 59, 255, .28), transparent 62%),
    radial-gradient(90% 90% at 100% 110%, rgba(34, 224, 214, .12), transparent 60%),
    linear-gradient(165deg, rgba(16, 31, 74, .86), rgba(7, 16, 38, .94));
  padding: clamp(1.5rem, 3.6vw, 3rem);
}

.contact-frame::before,
.contact-frame::after{
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  opacity: .7;
  pointer-events: none;
}

.contact-frame::before{
  top: 10px;
  left: 10px;
  border-right: 0;
  border-bottom: 0;
}

.contact-frame::after{
  right: 10px;
  bottom: 10px;
  border-top: 0;
  border-left: 0;
}

.contact-frame__inner{
  min-width: 0;
}

.contact-frame__tag{
  display: block;
  margin-bottom: .9rem;
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .28em;
  color: var(--cyan);
}

.contact-frame__title{
  margin: 0 0 1.25rem;
  color: var(--glass);
  max-width: 20ch;
}

.contact-frame__lede{
  margin: 0;
  max-width: var(--measure);
  color: var(--muted);
}

.contact-frame__quick{
  display: flex;
  flex-wrap: wrap;
  gap: .9rem 2.5rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding-top: clamp(1rem, 2.5vw, 1.5rem);
  border-top: 1px solid var(--line-soft);
}

.contact-quick{
  display: flex;
  flex-direction: column;
  gap: .35rem;
  margin: 0;
  min-width: 0;
}

.contact-quick__k{
  font-size: .7rem;
  letter-spacing: .28em;
  color: var(--muted);
}

.contact-quick__v{
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--glass);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

@media (min-width: 900px){
  .contact-frame{
    padding-left: 6rem;
  }
  .contact-frame__tag{
    position: absolute;
    top: 50%;
    left: 1.15rem;
    margin: 0;
    writing-mode: vertical-rl;
    transform: translateY(-50%);
    letter-spacing: .32em;
  }
}

/* ---------- 左右分屏 ---------- */
.contact-split-section{
  padding: 0 0 var(--ct-block);
}

.contact-split{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.25rem, 5vw, 4rem);
}

.contact-split__aside,
.contact-split__main{
  min-width: 0;
}

.contact-split__cap{
  display: flex;
  align-items: center;
  gap: .65rem;
  margin: 0 0 .85rem;
  font-size: .72rem;
  letter-spacing: .28em;
  color: var(--cyan);
}

.contact-split__cap::before{
  content: "";
  flex: 0 0 auto;
  width: 22px;
  height: 2px;
  background: var(--violet);
}

.contact-figure{
  margin: 0 0 1.5rem;
}

.page-contact .media-frame{
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink);
}

.page-contact .media-frame img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .media-frame__caption{
  padding: .7rem .9rem;
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--muted);
  opacity: .8;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 渠道卡片 ---------- */
.channel-list{
  display: grid;
  gap: .9rem;
  margin-top: 1.5rem;
}

.channel-card{
  position: relative;
  border: 1px solid var(--line-soft);
  background: rgba(16, 31, 74, .68);
  padding: 1.1rem 1.15rem 1.2rem;
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.channel-card::before{
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan);
  opacity: .35;
  transition: opacity var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.channel-card:hover,
.channel-card:focus-within{
  border-color: var(--cyan-soft);
  background: rgba(16, 31, 74, .92);
  transform: translateX(3px);
}

.channel-card:hover::before,
.channel-card:focus-within::before{
  opacity: 1;
  background: var(--violet);
}

.channel-card__label{
  margin: 0 0 .5rem;
  font-size: .7rem;
  letter-spacing: .28em;
  color: var(--cyan);
}

.channel-card__value{
  margin: 0 0 .7rem;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  font-weight: 800;
  line-height: 1.45;
  color: var(--glass);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.channel-card--address .channel-card__value{
  font-size: 1rem;
  font-weight: 600;
}

.channel-card__use{
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 反馈分类列表 ---------- */
.feedback-list{
  display: grid;
  gap: .75rem;
  margin-top: 1.75rem;
}

.feedback-item{
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(16, 31, 74, .58), rgba(7, 16, 38, .6));
  transition: border-color var(--dur) var(--ease);
}

.feedback-item[open]{
  border-color: var(--cyan-soft);
}

.feedback-item > summary{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .9rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

.feedback-item > summary::-webkit-details-marker{
  display: none;
}

.feedback-item > summary:hover{
  background: rgba(34, 224, 214, .06);
}

.feedback-item > summary:focus-visible{
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.feedback-item__num{
  font-size: .95rem;
  font-weight: 800;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease);
}

.feedback-item__num::after{
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  margin-left: .55rem;
  vertical-align: middle;
  background: var(--line);
  transition: width var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.feedback-item__title{
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--glass);
}

.feedback-item__desc{
  flex: 1 1 100%;
  font-size: .82rem;
  line-height: 1.6;
  color: var(--muted);
  opacity: .82;
}

.feedback-item__sign{
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-left: auto;
  align-self: center;
}

.feedback-item__sign::before,
.feedback-item__sign::after{
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.feedback-item__sign::before{
  top: 50%;
  left: 0;
  right: 0;
  height: 1.5px;
  margin-top: -.75px;
}

.feedback-item__sign::after{
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1.5px;
  margin-left: -.75px;
}

.feedback-item[open] .feedback-item__sign::before{
  background: var(--cyan);
}

.feedback-item[open] .feedback-item__sign::after{
  transform: scaleY(0);
}

.feedback-item[open] .feedback-item__num{
  color: var(--cyan);
}

.feedback-item[open] .feedback-item__num::after{
  width: 30px;
  background: var(--cyan);
}

.feedback-item__body{
  padding: 0 1.1rem 1.2rem;
  border-top: 1px dashed var(--line-soft);
  padding-top: 1rem;
}

.feedback-item__body .prose{
  margin: 0;
  font-size: .92rem;
}

.submit-points{
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.submit-points li{
  position: relative;
  padding-left: 1.25rem;
  font-size: .89rem;
  line-height: 1.75;
  color: var(--muted);
}

.submit-points li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

@media (min-width: 960px){
  .contact-split{
    grid-template-columns: 38fr 62fr;
  }
  .feedback-item__desc{
    flex: 0 1 auto;
  }
}

/* ---------- 合作与供稿 ---------- */
.contact-collab{
  padding: 0 0 var(--ct-block);
}

.collab-panel{
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
}

.collab-panel .panel__label{
  margin: 0 0 .85rem;
}

.collab-lede{
  margin: 0;
  max-width: var(--measure);
}

.collab-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.35rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.collab-cell{
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  transition: border-color var(--dur) var(--ease);
}

.collab-cell:hover{
  border-color: var(--cyan);
}

.collab-cell h3{
  margin: 0 0 .5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--glass);
}

.collab-cell p{
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--muted);
}

.collab-note{
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--muted);
}

.collab-link{
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-soft);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.collab-link:hover,
.collab-link:focus-visible{
  color: var(--glass);
  border-bottom-color: var(--cyan);
}

@media (min-width: 720px){
  .collab-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.25rem, 3vw, 2rem);
  }
}

/* ---------- 站点信息与备案 ---------- */
.contact-facts{
  padding: 0 0 clamp(3rem, 7vw, 5.5rem);
}

.contact-facts__panel{
  border: 1px solid var(--line-hard);
  background: var(--ink);
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
}

.contact-facts__panel .panel__label{
  margin: 0 0 .85rem;
}

.contact-facts__title{
  margin: 0;
}

.contact-facts__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem 2rem;
  margin-top: clamp(1.35rem, 3vw, 2rem);
}

.fact{
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding-left: .9rem;
  border-left: 1px solid var(--line-soft);
  transition: border-color var(--dur) var(--ease);
}

.fact:hover{
  border-color: var(--cyan);
}

.contact-facts__legal{
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
  opacity: .82;
  font-variant-numeric: tabular-nums;
  transition: opacity var(--dur) var(--ease);
}

.contact-facts__legal:hover{
  opacity: 1;
}

@media (min-width: 640px){
  .contact-facts__grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px){
  .contact-facts__grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>