.page-contact{
  --contact-panel-line: var(--line-strong);
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(40px, 6vw, 84px);
}

.page-contact .breadcrumb{
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(8px, 1.4vw, 16px);
}

.page-contact__stage{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 40px);
}

.page-contact__stage > *{
  min-width: 0;
}

/* ---------- 首屏 ---------- */
.page-contact__lead{
  max-width: 46rem;
}

.page-contact__title{
  margin: 10px 0 0;
  font-size: clamp(38px, 11vw, 84px);
  line-height: 1.04;
  letter-spacing: 0.06em;
  font-weight: 900;
  color: var(--paper);
}

.page-contact__title span{
  display: block;
  color: var(--mint);
  letter-spacing: 0.08em;
}

.page-contact__intro{
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 40rem;
  font-size: clamp(15.5px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-contact__meta{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 14px 0 0;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact__meta li{
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-contact__meta-key{
  color: var(--mint);
  font-size: 11px;
  letter-spacing: 0.12em;
}

/* ---------- 首屏配图 ---------- */
.page-contact__visual{
  margin: 0;
  border: 2px solid var(--contact-panel-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

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

/* ---------- 右侧信息栏 ---------- */
.page-contact__rail{
  min-width: 0;
}

.page-contact__rail-inner{
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-contact__panel{
  border: 2px solid var(--contact-panel-line);
  background: var(--panel);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: var(--shadow-hard-sm);
}

.page-contact__panel-index{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-contact__panel-title{
  margin: 0 0 14px;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-contact__mail,
.page-contact__tel{
  display: block;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color var(--ease), border-color var(--ease);
}

.page-contact__mail{
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.6vw, 18px);
  line-height: 1.5;
  color: var(--mint);
  border-bottom: 2px solid var(--teal);
  padding-bottom: 6px;
}

.page-contact__mail:hover{
  color: var(--paper);
  border-bottom-color: var(--mint);
}

.page-contact__tel{
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 30px);
  letter-spacing: 0.04em;
  color: var(--paper);
  border-bottom: 2px solid var(--contact-panel-line);
  padding-bottom: 8px;
}

.page-contact__tel:hover{
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-contact__mail:focus-visible,
.page-contact__tel:focus-visible{
  outline: 2px solid var(--mint);
  outline-offset: 4px;
}

.page-contact__panel-note{
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-contact__template{
  margin-top: 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--red);
  background: rgba(7, 26, 43, 0.72);
}

.page-contact__template--normal{
  border-left-color: var(--mist);
}

.page-contact__template-label{
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-contact__template--normal .page-contact__template-label{
  color: var(--mist);
}

.page-contact__template-text{
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-contact__desk{
  margin: 0;
  border: 2px solid var(--contact-panel-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard-sm);
}

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

.page-contact__facts{
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}

.page-contact__fact{
  display: grid;
  gap: 4px;
}

.page-contact__fact dt{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-contact__fact dd{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 章节通用标题 ---------- */
.page-contact__section-head{
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-contact__section-title{
  margin: 10px 0 0;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.18;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-contact__section-lead{
  margin: 12px 0 0;
  max-width: 44rem;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper-soft);
}

/* ---------- 三条通道 ---------- */
.page-contact__channel-list{
  display: grid;
  gap: clamp(12px, 2vw, 16px);
}

.page-contact__channel{
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: clamp(16px, 2.6vw, 22px);
}

.page-contact__channel:focus-within{
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

.page-contact__channel-index{
  margin: 0;
  padding-right: 10px;
  border-right: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.1;
  color: var(--mint);
}

.page-contact__channel-body{
  min-width: 0;
}

.page-contact__channel-title{
  margin: 0 0 8px;
  font-size: clamp(17px, 2.4vw, 21px);
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-contact__channel-body p{
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-soft);
}

/* ---------- 合作准备 ---------- */
.page-contact__steps{
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-contact__steps li{
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 0;
  border-bottom: 2px solid var(--line);
}

.page-contact__step-num{
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-contact__steps h3{
  margin: 0;
  font-size: 16.5px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-contact__steps p{
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-contact__aside-note{
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--teal);
  background: rgba(18, 58, 87, 0.55);
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-soft);
}

/* ---------- 问题反馈 ---------- */
.page-contact__checklist{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-contact__checklist li{
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-contact__checklist li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 12px;
  height: 2px;
  background: var(--red);
}

.page-contact__checklist strong{
  color: var(--paper);
  font-weight: 600;
}

.page-contact__feedback-side{
  border: 2px solid var(--contact-panel-line);
  background: var(--ink-2);
  padding: clamp(16px, 2.4vw, 22px);
  box-shadow: var(--shadow-hard-sm);
}

.page-contact__feedback-side p{
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-soft);
}

/* ---------- 备案与地区 ---------- */
.page-contact__registry{
  border-top: 2px solid var(--contact-panel-line);
  padding-top: clamp(18px, 3vw, 26px);
}

.page-contact__registry dl{
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
}

.page-contact__reg-row{
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

.page-contact__reg-row dt{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact__reg-row dd{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact__registry-note{
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper-soft);
}

/* ---------- 收束带 ---------- */
.page-contact__closing{
  margin-top: clamp(26px, 4.4vw, 40px);
  padding-top: clamp(22px, 3.6vw, 34px);
  padding-bottom: clamp(10px, 2vw, 18px);
  border-top: 2px solid var(--red);
  display: grid;
  gap: 14px;
}

.page-contact__closing-title{
  margin: 0;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.16;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-contact__closing-text{
  margin: 0;
  max-width: 44rem;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-contact__closing-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

/* ---------- 桌面：非对称双栏 ---------- */
@media (min-width: 900px){
  .page-contact__stage{
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-contact__lead,
  .page-contact__visual,
  .page-contact__channels,
  .page-contact__cooperation,
  .page-contact__feedback,
  .page-contact__registry{
    grid-column: 1;
  }

  .page-contact__rail{
    grid-column: 2;
    grid-row: 1 / span 6;
    align-self: stretch;
  }

  .page-contact__rail-inner{
    position: sticky;
    top: 88px;
  }

  .page-contact__closing{
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    column-gap: clamp(24px, 4vw, 48px);
  }

  .page-contact__closing-title,
  .page-contact__closing-text{
    grid-column: 1;
  }

  .page-contact__closing-actions{
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: end;
    margin-top: 0;
  }
}

@media (min-width: 1180px){
  .page-contact__channel{
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .page-contact__channel-index{
    font-size: 26px;
  }
}
<<<END>>>