.page-contact {
  --ct-hair: rgba(110, 98, 82, 0.34);
  --ct-hair-soft: rgba(110, 98, 82, 0.16);
  --ct-grid: rgba(110, 98, 82, 0.09);
  --ct-shadow: 0 24px 52px -32px rgba(11, 31, 26, 0.78);
  --ct-text: #45392E;
  background-color: var(--night);
  color: var(--ink);
  padding: clamp(18px, 3vw, 34px) 0 clamp(56px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(232, 220, 192, 0.58);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-contact .breadcrumb a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--paper-light);
  border-bottom-color: var(--signal);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--seal);
}

/* ---------- 纸面画布 ---------- */
.page-contact .contact-sheet {
  position: relative;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--ct-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ct-grid) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: -1px -1px;
  padding: clamp(24px, 4.4vw, 62px) clamp(18px, 4vw, 68px) clamp(32px, 5vw, 72px);
  box-shadow: var(--ct-shadow), inset 0 0 0 1px rgba(27, 21, 18, 0.1);
  color: var(--ink);
}

/* ---------- 通用标题与正文 ---------- */
.page-contact h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--ink);
}

/* ---------- 刊头 ---------- */
.page-contact .contact-mast {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding-bottom: clamp(24px, 3.4vw, 42px);
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .contact-mast__main {
  min-width: 0;
}

.page-contact .contact-mast h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.6vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.012em;
  margin: 12px 0 0;
  color: var(--ink);
}

.page-contact .contact-mast__intro {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.9vw, 17px);
  line-height: 1.78;
  color: var(--ct-text);
}

.page-contact .contact-mast__side {
  display: flex;
  min-width: 0;
}

.page-contact .contact-stamp {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 16px 18px;
  min-width: 190px;
  border: 1px dashed var(--seal);
  background-color: rgba(232, 179, 60, 0.1);
}

.page-contact .contact-stamp__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ash);
}

.page-contact .contact-stamp__text {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .contact-stamp__sub {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 12.5px;
  color: var(--ash);
}

/* ---------- 三条通道：左清单 / 右说明 ---------- */
.page-contact .contact-channels {
  margin-top: clamp(34px, 5vw, 58px);
  display: grid;
  gap: clamp(24px, 3.4vw, 34px);
}

.page-contact .channel-rail {
  min-width: 0;
}

.page-contact .channel-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  border-top: 1px solid var(--ct-hair);
}

.page-contact .channel-list__item {
  border-bottom: 1px solid var(--ct-hair);
}

.page-contact .channel-link {
  position: relative;
  display: grid;
  gap: 3px;
  padding: 15px 14px 15px 18px;
  color: inherit;
  text-decoration: none;
  transition: background-color 0.22s var(--ease);
}

.page-contact .channel-link::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background-color: var(--signal);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.26s var(--ease);
}

.page-contact .channel-link:hover,
.page-contact .channel-link:focus-visible {
  background-color: rgba(232, 179, 60, 0.14);
}

.page-contact .channel-link:hover::before,
.page-contact .channel-link:focus-visible::before {
  transform: scaleY(1);
}

.page-contact .channel-link:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-contact .channel-link__idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.page-contact .channel-link__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .channel-link__value {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ash);
  word-break: break-word;
}

.page-contact .channel-panels {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  min-width: 0;
}

.page-contact .channel-panel {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
  scroll-margin-top: 24px;
}

.page-contact .channel-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-contact .channel-panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 25px);
  line-height: 1.24;
  margin: 0;
  color: var(--ink);
}

.page-contact .channel-panel__lead {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.76;
  color: var(--ct-text);
}

.page-contact .fit-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .fit-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ct-text);
}

.page-contact .fit-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.66em;
  width: 7px;
  height: 7px;
  border: 1px solid var(--signal);
  transform: rotate(45deg);
}

/* ---------- 图片 ---------- */
.page-contact .contact-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
  display: grid;
  gap: 12px;
}

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

.page-contact .contact-figure figcaption {
  margin: 0;
}

/* ---------- 数据纠错 ---------- */
.page-contact .contact-fix {
  margin-top: clamp(46px, 7vw, 82px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: 1px solid var(--ct-hair);
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-contact .contact-fix__intro {
  min-width: 0;
}

.page-contact .contact-fix__intro p {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: 16.5px;
  line-height: 1.76;
  color: var(--ct-text);
}

.page-contact .fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ct-hair-soft);
  min-width: 0;
}

.page-contact .fix-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 4px;
  border-bottom: 1px dashed var(--ct-hair);
}

.page-contact .fix-item__box {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1.5px solid var(--ash);
  background-color: var(--paper-light);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.6);
}

.page-contact .fix-item__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--signal);
  border-bottom: 2px solid var(--signal);
  transform: rotate(42deg) scale(0);
  transform-origin: center;
  transition: transform 0.22s var(--ease);
}

.page-contact .fix-item:hover .fix-item__box::after {
  transform: rotate(42deg) scale(1);
}

.page-contact .fix-item__body {
  min-width: 0;
}

.page-contact .fix-item h3 {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-contact .fix-item p {
  margin: 6px 0 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ct-text);
}

/* ---------- 合作与资料交换 ---------- */
.page-contact .contact-coop {
  margin-top: clamp(46px, 7vw, 82px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: 1px solid var(--ct-hair);
}

.page-contact .contact-coop__lead {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 16.5px;
  line-height: 1.76;
  color: var(--ct-text);
}

.page-contact .coop-list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-contact .coop-item {
  padding: 2px 0 2px 22px;
  border-left: 2px solid var(--seal);
  min-width: 0;
}

.page-contact .coop-item__idx {
  display: block;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--link);
}

.page-contact .coop-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.3vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .coop-item p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 15.8px;
  line-height: 1.74;
  color: var(--ct-text);
}

/* ---------- 回复节奏 ---------- */
.page-contact .contact-cadence {
  margin-top: clamp(46px, 7vw, 82px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: 1px solid var(--ct-hair);
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-contact .contact-cadence__body {
  min-width: 0;
}

.page-contact .contact-cadence__body > p {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.76;
  color: var(--ct-text);
}

.page-contact .cadence-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .cadence-list li {
  display: grid;
  gap: 5px;
  padding-left: 16px;
  border-left: 1px solid var(--ct-hair);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ct-text);
}

.page-contact .cadence-list .mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--link);
}

.page-contact .contact-figure--side {
  margin-top: 0;
}

/* ---------- 通信与来访 ---------- */
.page-contact .contact-visit {
  margin-top: clamp(46px, 7vw, 82px);
  padding-top: clamp(26px, 3.6vw, 42px);
  border-top: 1px solid var(--ct-hair);
}

.page-contact .visit-grid {
  margin-top: clamp(22px, 3vw, 32px);
  display: grid;
  gap: clamp(20px, 2.8vw, 30px);
}

.page-contact .visit-block {
  padding-top: 14px;
  border-top: 1px solid var(--ct-hair);
  min-width: 0;
}

.page-contact .visit-block h3 {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-contact .visit-block p {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ct-text);
}

.page-contact .visit-address {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-contact .visit-record {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--link);
}

/* ---------- 便签提示 ---------- */
.page-contact .contact-note {
  margin: clamp(40px, 6vw, 70px) 0 0;
  max-width: 620px;
  padding: 24px 26px 22px;
  background-color: var(--paper-light);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(110, 98, 82, 0.05) 0 6px,
    transparent 6px 12px
  );
  border: 1px solid var(--ct-hair);
  border-left: 4px solid var(--seal);
  box-shadow: 0 16px 30px -22px rgba(11, 31, 26, 0.8);
  transform: rotate(-0.6deg);
}

.page-contact .contact-note__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .contact-note p {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--ct-text);
}

.page-contact .contact-note__sign {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13.5px;
  color: var(--ash);
  text-align: right;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 880px) {
  .page-contact .contact-mast {
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: start;
  }

  .page-contact .contact-mast__side {
    justify-content: flex-end;
  }

  .page-contact .contact-channels {
    grid-template-columns: 274px minmax(0, 1fr);
    gap: clamp(32px, 4.2vw, 58px);
  }

  .page-contact .channel-rail {
    position: sticky;
    top: clamp(16px, 2.4vw, 28px);
    align-self: start;
  }

  .page-contact .contact-fix {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: clamp(32px, 4.2vw, 58px);
  }

  .page-contact .contact-cadence {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }

  .page-contact .visit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-contact .coop-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 2.6vw, 34px);
  }
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 600px) {
  .page-contact .contact-sheet {
    padding-left: 16px;
    padding-right: 16px;
    background-size: 22px 22px;
  }

  .page-contact .contact-note {
    transform: none;
    padding: 20px 18px 18px;
  }

  .page-contact .contact-stamp {
    min-width: 0;
    width: 100%;
  }
}

/* ---------- 降级动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-link,
  .page-contact .channel-link::before,
  .page-contact .fix-item__box::after {
    transition-duration: 0.01ms;
  }

  .page-contact .channel-link::before {
    transform: scaleY(1);
    opacity: 0;
  }

  .page-contact .channel-link:hover::before,
  .page-contact .channel-link:focus-visible::before {
    opacity: 1;
  }

  .page-contact .fix-item__box::after {
    transform: rotate(42deg) scale(1);
    opacity: 0.25;
  }
}