.page-contact {
  --pc-line: #123A2F;
  --pc-rail-w: 5fr;
  --pc-flow-w: 7fr;
  padding-top: clamp(104px, 13vw, 148px);
  padding-bottom: 64px;
  background: var(--ink-900);
  color: var(--paper-100);
  overflow-x: hidden;
}

.page-contact .wrap {
  padding-left: 18px;
  padding-right: 18px;
}

/* 面包屑 */
.page-contact .crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted-400);
  margin-bottom: 22px;
}

.page-contact .crumb a {
  color: var(--muted-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-contact .crumb a:hover,
.page-contact .crumb a:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
}

/* 首屏拼贴 */
.page-contact .masthead {
  display: grid;
  gap: 26px;
  padding-bottom: clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .masthead__text {
  position: relative;
}

.page-contact .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan-300);
  margin: 0 0 14px;
}

.page-contact .eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--cyan-300);
}

.page-contact .display {
  margin: 0 0 16px;
  font-size: clamp(30px, 7.4vw, 56px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.01em;
}

.page-contact .masthead__lede {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted-400);
}

.page-contact .masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-contact .masthead__stamp {
  margin-top: 20px;
}

.page-contact .masthead__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--pc-line);
}

.page-contact .masthead__media img,
.page-contact .fb-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* 双栏主体 */
.page-contact .contact-grid {
  display: grid;
  gap: clamp(28px, 5vw, 54px);
  padding-top: clamp(30px, 5vw, 54px);
}

.page-contact .rail-block + .rail-block {
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px solid var(--pc-line);
}

.page-contact .rail-title {
  margin: 0 0 8px;
  font-size: clamp(20px, 4.4vw, 26px);
  font-weight: 800;
  line-height: 1.2;
}

.page-contact .rail-sub {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted-400);
}

/* 联系路径胶囊 */
.page-contact .path {
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius-md);
  transition: border-color var(--ease), background-color var(--ease);
}

.page-contact .path + .path {
  margin-top: 10px;
}

.page-contact .path:hover,
.page-contact .path[open] {
  border-color: var(--lime-600);
}

.page-contact .path[open] {
  background: var(--ink-700);
}

.page-contact .path__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-md);
}

.page-contact .path__head::-webkit-details-marker {
  display: none;
}

.page-contact .path__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  border-radius: var(--pill);
  background: var(--ink-900);
  color: var(--cyan-300);
  border: 1px solid var(--pc-line);
}

.page-contact .path[open] .path__icon {
  color: var(--lime-400);
  border-color: var(--lime-600);
}

.page-contact .path__body {
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-contact .path__label {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted-400);
}

.page-contact .path__value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--paper-100);
  overflow-wrap: anywhere;
}

.page-contact .path__value--long {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

.page-contact .path__cue {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--muted-400);
  transition: transform var(--ease), color var(--ease);
}

.page-contact .path[open] .path__cue {
  transform: rotate(45deg);
  color: var(--lime-400);
}

.page-contact .path__panel {
  padding: 0 16px 16px 66px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-contact .path__panel p {
  margin: 0 0 8px;
}

.page-contact .path__panel p:last-child {
  margin-bottom: 0;
}

/* 响应时标尺 */
.page-contact .ruler {
  padding: 18px 16px 12px;
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius-md);
}

.page-contact .ruler__track {
  position: relative;
  height: 14px;
  border-radius: var(--pill);
  background: var(--ink-900);
  box-shadow: inset 0 0 0 1px var(--pc-line);
}

.page-contact .ruler__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 37.5%;
  width: 37.5%;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--lime-600), var(--lime-400));
}

.page-contact .ruler__tip {
  position: absolute;
  left: 37.5%;
  bottom: calc(100% + 8px);
  padding: 4px 10px;
  font-size: 11px;
  white-space: nowrap;
  color: var(--ink-900);
  background: var(--lime-400);
  border-radius: var(--pill);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--ease), transform var(--ease);
  pointer-events: none;
}

.page-contact .ruler__track:hover .ruler__tip,
.page-contact .ruler__track:focus-visible .ruler__tip {
  opacity: 1;
  transform: translateY(0);
}

.page-contact .ruler__scale {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted-400);
}

.page-contact .reply-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-contact .reply-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 12px;
}

.page-contact .reply-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--cyan-300);
}

.page-contact .reply-num {
  color: var(--lime-400);
  font-weight: 700;
}

.page-contact .rail-note {
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-400);
  background: var(--ink-800);
  border-left: 2px solid var(--cyan-300);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* 右栏章节 */
.page-contact .block + .block {
  margin-top: clamp(34px, 6vw, 58px);
  padding-top: clamp(30px, 5vw, 48px);
  border-top: 1px solid var(--pc-line);
}

.page-contact .block h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 800;
  line-height: 1.18;
}

.page-contact .block-lede {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted-400);
  max-width: 36em;
}

.page-contact .block-foot {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted-400);
}

.page-contact .block-foot a {
  color: var(--cyan-300);
  text-decoration: none;
  border-bottom: 1px solid var(--pc-line);
  transition: color var(--ease), border-color var(--ease);
}

.page-contact .block-foot a:hover,
.page-contact .block-foot a:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
}

/* 反馈章节 */
.page-contact .fb-split {
  display: grid;
  gap: 18px;
  margin-bottom: 22px;
}

.page-contact .fb-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--pc-line);
}

.page-contact .fb-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-contact .fb-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .fb-item:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .fb-key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-300);
  padding-top: 3px;
}

.page-contact .fb-item strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-contact .fb-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted-400);
}

.page-contact .sample {
  margin-top: 20px;
  padding: 16px 18px;
  background: var(--ink-800);
  border-left: 3px solid var(--lime-400);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-contact .sample__label {
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--lime-400);
}

.page-contact .sample__line {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper-100);
}

.page-contact .sample__foot {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted-400);
}

/* 商务与合作 */
.page-contact .biz {
  display: grid;
  gap: 10px;
}

.page-contact .biz-item {
  background: var(--ink-800);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius-md);
  transition: border-color var(--ease);
}

.page-contact .biz-item:hover,
.page-contact .biz-item[open] {
  border-color: var(--lime-600);
}

.page-contact .biz-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-contact .biz-head::-webkit-details-marker {
  display: none;
}

.page-contact .biz-title {
  flex: 1 1 auto;
  font-size: 15px;
  font-weight: 700;
}

.page-contact .biz-meta {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--muted-400);
  padding: 3px 9px;
  border-radius: var(--pill);
  background: var(--ink-900);
}

.page-contact .biz-cue {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--muted-400);
  transition: transform var(--ease), color var(--ease);
}

.page-contact .biz-item[open] .biz-cue {
  transform: rotate(45deg);
  color: var(--lime-400);
}

.page-contact .biz-list {
  margin: 0;
  padding: 0 16px 16px 34px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-contact .biz-list li {
  margin-bottom: 8px;
}

.page-contact .biz-list li::marker {
  color: var(--cyan-300);
}

/* 到访提示 */
.page-contact .visit-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.78;
  color: var(--paper-100);
}

.page-contact .visit-list li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .visit-list li:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .visit-dot {
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--lime-400);
}

.page-contact .visit-card {
  margin-top: 20px;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--ink-700), var(--ink-800));
  border: 1px solid var(--pc-line);
}

.page-contact .visit-card__label {
  margin: 0 0 8px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--cyan-300);
}

.page-contact .visit-card__value {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
}

.page-contact .visit-card__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted-400);
}

/* 底部坐标 */
.page-contact .coord-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: clamp(34px, 6vw, 56px);
  padding-top: 16px;
  border-top: 1px dashed var(--pc-line);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--muted-400);
}

.page-contact .coord-strip__tick {
  flex: 1 1 auto;
  height: 8px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--pc-line) 0,
    var(--pc-line) 1px,
    transparent 1px,
    transparent 12px
  );
}

/* 中等屏幕：反馈图文并排 */
@media (min-width: 720px) {
  .page-contact .fb-split {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
  }
}

/* 桌面：非对称双栏 */
@media (min-width: 960px) {
  .page-contact .wrap {
    padding-left: 28px;
    padding-right: 28px;
  }

  .page-contact .masthead {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 40px;
  }

  .page-contact .masthead__media {
    margin-top: 6px;
  }

  .page-contact .contact-grid {
    grid-template-columns: minmax(0, var(--pc-rail-w)) minmax(0, var(--pc-flow-w));
    align-items: start;
  }

  .page-contact .rail {
    position: sticky;
    top: 104px;
  }

  .page-contact .path__panel {
    padding-left: 66px;
  }
}

@media (min-width: 1180px) {
  .page-contact .masthead {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
  }
}
<<<END>>>