.page-contact .breadcrumb { margin-top: 24px; }

/* ---------- 首屏：左窄右宽 ---------- */
.page-contact .contact-hero { padding: 24px 0 0; }
.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-contact .rail {
  background: var(--ink-2);
  color: var(--on-dark);
  border-top: 4px solid var(--orange);
  padding: 26px 22px 24px;
}
.page-contact .rail__label {
  margin: 0 0 14px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--orange);
}
.page-contact .rail__row {
  padding: 15px 12px;
  border-bottom: 1px solid var(--line-dark);
  transition: background .18s var(--ease);
}
.page-contact .rail__row:hover { background: rgba(255, 90, 31, .14); }
.page-contact .rail__k {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
  margin-bottom: 6px;
}
.page-contact .rail__v {
  display: block;
  font-family: var(--mono);
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}
.page-contact .rail__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .contact-hero__main { padding-top: 4px; }
.page-contact .contact-hero__main h1 {
  margin: 12px 0 20px;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ink);
}
.page-contact .contact-hero__lede {
  max-width: 34em;
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
}
.page-contact .contact-hero__text {
  max-width: 34em;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}
.page-contact .contact-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 段落通用 ---------- */
.page-contact .section__lede {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 三类事项切换 ---------- */
.page-contact .routing {
  margin-top: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 20px 18px 22px;
}
.page-contact .routing__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.page-contact .routing__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-contact .routing__tab {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1;
  padding: 11px 18px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  cursor: pointer;
  transition: background .16s var(--ease), color .16s var(--ease), border-color .16s var(--ease);
}
.page-contact .routing__tab:hover {
  border-color: var(--orange);
  color: var(--orange-deep);
}
.page-contact #rk-sub:checked ~ .routing__tabs .routing__tab[for="rk-sub"],
.page-contact #rk-proj:checked ~ .routing__tabs .routing__tab[for="rk-proj"],
.page-contact #rk-site:checked ~ .routing__tabs .routing__tab[for="rk-site"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.page-contact .routing__radio:focus-visible ~ .routing__tabs .routing__tab {
  outline: 2px solid var(--orange-deep);
  outline-offset: 2px;
}
.page-contact .routing__panels {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.page-contact .routing__panel { display: none; }
.page-contact #rk-sub:checked ~ .routing__panels .routing__panel--sub,
.page-contact #rk-proj:checked ~ .routing__panels .routing__panel--proj,
.page-contact #rk-site:checked ~ .routing__panels .routing__panel--site { display: block; }

.page-contact .routing__panel h3 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
}
.page-contact .routing__panel > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-contact .kv { margin: 18px 0 0; }
.page-contact .kv__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.page-contact .kv dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}
.page-contact .kv dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.page-contact .routing__more { margin: 16px 0 0; font-size: 15px; }
.page-contact .routing__more a {
  color: var(--orange-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
  transition: border-bottom-width .16s var(--ease);
}
.page-contact .routing__more a:hover { border-bottom-width: 2px; }

/* ---------- 渠道选择 ---------- */
.page-contact .channel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: start;
}
.page-contact .channel__intro h2 {
  margin: 12px 0 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
}
.page-contact .channel__intro p {
  margin: 12px 0 0;
  max-width: 28em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--slate);
}
.page-contact .channel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-contact .channel__item {
  padding: 18px 0;
  border-top: 1px solid var(--line);
  transition: border-color .16s var(--ease);
}
.page-contact .channel__item:last-child { border-bottom: 1px solid var(--line); }
.page-contact .channel__item:hover { border-top-color: var(--orange); }
.page-contact .channel__item h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}
.page-contact .channel__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- 反馈三样 ---------- */
.page-contact .feedback {
  background: var(--sand);
  padding: 54px 0;
}
.page-contact .feedback__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-contact .feedback__body h2 {
  margin: 12px 0 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
}
.page-contact .feedback__body > p {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-contact .checklist {
  margin-top: 24px;
  background: var(--white);
  border: 1px solid var(--line);
}
.page-contact .check {
  position: relative;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 16px;
  border-top: 1px solid var(--line);
  cursor: pointer;
  transition: background .16s var(--ease);
}
.page-contact .check:first-of-type { border-top: 0; }
.page-contact .check:hover { background: rgba(255, 90, 31, .06); }
.page-contact .check input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.page-contact .check__box {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--line-strong);
  background: var(--white);
  transition: background .16s var(--ease), border-color .16s var(--ease);
}
.page-contact .check input:checked + .check__box {
  background: var(--orange);
  border-color: var(--orange);
}
.page-contact .check input:checked + .check__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 5px;
  height: 11px;
  border: 2px solid var(--white);
  border-top: 0;
  border-left: 0;
  transform: rotate(42deg);
}
.page-contact .check input:focus-visible + .check__box {
  outline: 2px solid var(--orange-deep);
  outline-offset: 2px;
}
.page-contact .check__txt {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-contact .check__txt strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 2px;
}
.page-contact .checklist__ready {
  display: none;
  margin: 0;
  padding: 13px 16px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
}
.page-contact .checklist:has(#ck-page:checked):has(#ck-device:checked):has(#ck-desc:checked) .checklist__ready {
  display: block;
}
.page-contact .feedback__foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}
.page-contact .feedback__foot a {
  color: var(--orange-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
}
.page-contact .feedback__foot a:hover { border-bottom-width: 2px; }
.page-contact .feedback__figure { margin: 0; }

/* ---------- 四步洽谈流程 ---------- */
.page-contact .steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}
.page-contact .step {
  position: relative;
  padding: 24px 16px 24px 0;
  border-top: 1px solid var(--line-strong);
}
.page-contact .step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--slate-100);
  transition: background .16s var(--ease);
}
.page-contact .step:hover::before,
.page-contact .step:has(> .step__d[open])::before { background: var(--orange); }
.page-contact .step__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 12px;
  align-items: baseline;
  list-style: none;
  cursor: pointer;
  padding-top: 4px;
}
.page-contact .step__sum::-webkit-details-marker { display: none; }
.page-contact .step__sum:focus-visible {
  outline: 2px solid var(--orange-deep);
  outline-offset: 4px;
}
.page-contact .step__num {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--orange-deep);
}
.page-contact .step__title {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-contact .step__time {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
}
.page-contact .step__body {
  padding-top: 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- 来访与接待 ---------- */
.page-contact .visit__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}
.page-contact .visit__figure { margin: 0; }
.page-contact .visit__figure .figure__media,
.page-contact .visit__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .visit__body h2 {
  margin: 12px 0 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.01em;
}
.page-contact .visit__body > p {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-contact .map {
  position: relative;
  height: 190px;
  margin-top: 24px;
  border: 1px solid var(--line);
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 34px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 34px 100%,
    var(--white);
  overflow: hidden;
}
.page-contact .map__road {
  position: absolute;
  left: 0;
  right: 0;
  top: 40%;
  height: 12px;
  background: var(--sand);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-contact .map__pin {
  position: absolute;
  left: 50%;
  top: 31%;
  width: 13px;
  height: 13px;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, .18);
}
.page-contact .map__tag {
  position: absolute;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  color: var(--ink-2);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 4px 8px;
}
.page-contact .map__tag--name { left: 10px; top: calc(40% + 20px); }
.page-contact .map__tag--fl { right: 10px; top: 12px; border-color: var(--orange); color: var(--orange-deep); }

.page-contact .visit__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}
.page-contact .visit__list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-contact .visit__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 10px;
  height: 2px;
  background: var(--orange);
}

/* ---------- 图片基础 ---------- */
.page-contact .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.page-contact .figure__cap {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 420px) {
  .page-contact .rail__v { font-size: 14px; }
  .page-contact .routing__tab { padding: 10px 14px; }
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 640px) {
  .page-contact .kv__row { grid-template-columns: 132px minmax(0, 1fr); gap: 16px; align-items: baseline; }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
  }
  .page-contact .routing { padding: 26px 28px 30px; }
  .page-contact .channel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
  }
  .page-contact .channel__intro { position: sticky; top: 96px; }
  .page-contact .feedback { padding: 72px 0; }
  .page-contact .feedback__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }
  .page-contact .steps { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-contact .step { padding-right: 24px; }
  .page-contact .visit__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .rail__row,
  .page-contact .routing__tab,
  .page-contact .channel__item,
  .page-contact .check,
  .page-contact .check__box,
  .page-contact .step::before,
  .page-contact .routing__more a,
  .page-contact .feedback__foot a {
    transition: none;
  }
}