.page-contact {
  --c-gap: clamp(1rem, 2.6vw, 1.75rem);
  --c-cut: 16px;
  position: relative;
  padding: clamp(1.1rem, 3vw, 1.8rem) 0 clamp(3rem, 7vw, 5.5rem);
  color: var(--fx-paper);
  font-family: var(--font-sans);
  background:
    radial-gradient(120% 60% at 88% -10%, rgba(255, 90, 31, 0.16), transparent 62%),
    radial-gradient(80% 50% at 0% 18%, rgba(57, 230, 210, 0.08), transparent 66%),
    var(--fx-night);
}

.page-contact h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.2vw, 1.95rem);
  line-height: 1.32;
  letter-spacing: 0.01em;
}

.page-contact .mono,
.page-contact .chan-mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
  letter-spacing: 0.01em;
  word-break: break-word;
  color: var(--fx-sand);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--fx-cyan);
  outline-offset: 3px;
}

.page-contact .breadcrumb {
  padding-top: 0.3rem;
  font-size: 0.82rem;
}

.page-contact .eyebrow {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fx-orange);
}

/* 首屏 */
.contact-hero {
  padding: clamp(1.6rem, 5vw, 3.4rem) 0 clamp(1.2rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.contact-hero__title {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.85rem, 5.2vw, 3.4rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

.contact-hero__lede {
  margin: clamp(0.9rem, 2.4vw, 1.3rem) 0 0;
  max-width: 60ch;
  font-size: clamp(0.96rem, 2.1vw, 1.05rem);
  line-height: 1.85;
  color: rgba(243, 239, 229, 0.88);
}

.contact-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.3rem, 3vw, 2rem) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.contact-hero__facts > li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 0.95rem;
  background: var(--fx-night-deep);
}

.fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--fx-cyan);
}

.fact-label {
  font-size: 0.76rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--fx-stone);
}

/* 章节头 */
.sec-head {
  position: relative;
  display: grid;
  gap: 0.45rem;
  margin-bottom: clamp(1rem, 2.4vw, 1.6rem);
  padding-top: clamp(0.9rem, 2vw, 1.2rem);
  border-top: 1px solid var(--line);
}

.sec-head::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--fx-orange), var(--fx-orange-deep));
}

.sec-head__note {
  margin: 0;
  max-width: 64ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--fx-stone);
}

/* 坐标卡 + 节点入口 */
.contact-map,
.correction,
.channels,
.checklist-block,
.registry {
  margin-top: clamp(2rem, 5vw, 3.4rem);
}

.contact-map__grid {
  display: grid;
  gap: var(--c-gap);
}

.coord-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(170deg, var(--fx-archive), rgba(16, 23, 18, 0.98));
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - var(--c-cut)) 0, 100% var(--c-cut), 100% 100%, 0 100%);
}

.coord-card__figure {
  position: relative;
  margin: 0;
  border-bottom: 1px solid rgba(255, 90, 31, 0.45);
  background: var(--fx-night-deep);
}

.coord-card__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 23, 18, 0) 45%, rgba(20, 61, 43, 0.85) 100%);
  pointer-events: none;
}

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

.coord-card__body {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1rem, 2.6vw, 1.45rem);
}

.coord-card__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--fx-orange);
}

.coord-card__addr {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.02rem, 2.2vw, 1.28rem);
  line-height: 1.55;
}

.coord-rows,
.reg-rows {
  display: grid;
  gap: 0.6rem;
  margin: 0;
}

.coord-row,
.reg-row {
  display: grid;
  gap: 0.15rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--line);
}

.coord-row dt,
.reg-row dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fx-sand);
}

.coord-row dd,
.reg-row dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(243, 239, 229, 0.94);
}

.coord-row--mono dd,
.reg-row--mono dd {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.01em;
  color: var(--fx-sand);
}

.coord-card__note {
  margin: 0;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--fx-stone);
}

.node-list {
  display: grid;
  gap: var(--c-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.node {
  position: relative;
  padding: clamp(1rem, 2.4vw, 1.5rem) clamp(1rem, 2.6vw, 1.6rem);
  background: linear-gradient(180deg, rgba(28, 42, 35, 0.94), rgba(16, 23, 18, 0.98));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--c-cut)), calc(100% - var(--c-cut)) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.node::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--fx-orange), var(--fx-orange-deep));
}

.node:hover {
  border-color: rgba(255, 90, 31, 0.5);
}

.node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.7rem;
}

.node__num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  line-height: 1;
  color: var(--fx-orange);
}

.node__title {
  margin: 0;
  flex: 1 1 12ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.08rem, 2.4vw, 1.32rem);
  line-height: 1.45;
}

.node__text {
  margin: 0.8rem 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(243, 239, 229, 0.86);
}

.node__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  padding-bottom: 2px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 230, 210, 0.42);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.node__link:hover {
  color: var(--fx-paper);
  border-color: var(--fx-paper);
}

/* 纠错格式 */
.step-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: clamp(0.9rem, 2.2vw, 1.3rem);
  background: var(--fx-night-deep);
}

.step__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--fx-sand);
}

.step h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fx-paper);
}

.step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--fx-stone);
}

/* 渠道表 */
.channels__scroll {
  border: 1px solid var(--line);
}

.channels__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.channels__table thead th {
  padding: 0.7rem 0.9rem;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fx-sand);
  background: rgba(20, 61, 43, 0.72);
  border-bottom: 1px solid var(--line-strong);
}

.channels__table tbody td {
  padding: 0.85rem 0.9rem;
  vertical-align: top;
  line-height: 1.75;
  border-bottom: 1px solid var(--line);
  color: rgba(243, 239, 229, 0.88);
}

.channels__table tbody tr:last-child td {
  border-bottom: 0;
}

.channels__table tbody tr:nth-child(even) {
  background: rgba(20, 61, 43, 0.34);
}

/* 合作准备清单 */
.checklist {
  display: grid;
  gap: var(--c-gap);
}

.checklist__figure {
  margin: 0;
}

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

.checklist__figure .media__caption {
  margin-top: 0.6rem;
}

.coop {
  background: rgba(16, 23, 18, 0.94);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}

.coop + .coop {
  margin-top: 0.7rem;
}

.coop:hover {
  border-color: rgba(57, 230, 210, 0.42);
}

.coop summary {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.95rem 1.1rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--fx-paper);
  cursor: pointer;
  list-style: none;
}

.coop summary::-webkit-details-marker {
  display: none;
}

.coop summary::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--fx-orange);
  transform: rotate(45deg);
}

.coop summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--fx-sand);
}

.coop[open] summary {
  background: rgba(20, 61, 43, 0.62);
  border-bottom: 1px solid var(--line);
}

.coop[open] summary::after {
  content: "－";
  color: var(--fx-cyan);
}

.coop__body {
  margin: 0;
  padding: 0.35rem 1.1rem 1rem;
}

.coop__item {
  display: grid;
  gap: 0.2rem;
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--line);
}

.coop__item:last-child {
  border-bottom: 0;
  padding-bottom: 0.2rem;
}

.coop__item dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--fx-sand);
}

.coop__item dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(243, 239, 229, 0.88);
}

/* 地址与备案 */
.registry__panel {
  display: grid;
  gap: var(--c-gap);
  padding: clamp(1.1rem, 3vw, 1.8rem);
  background: linear-gradient(135deg, rgba(20, 61, 43, 0.92), rgba(16, 23, 18, 0.96));
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--c-cut) 100%, 0 calc(100% - var(--c-cut)));
}

.reg-row dd {
  max-width: 62ch;
}

.registry__links-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fx-orange);
}

.registry__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.registry__links a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 0.9rem;
  color: var(--fx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(57, 230, 210, 0.38);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.registry__links a:hover {
  color: var(--fx-paper);
  border-color: var(--fx-paper);
}

/* 移动端渠道表改为分条 */
@media (max-width: 719px) {
  .channels__scroll {
    border: 0;
  }

  .channels__table,
  .channels__table tbody,
  .channels__table tr,
  .channels__table td {
    display: block;
    width: 100%;
  }

  .channels__table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .channels__table tbody tr {
    margin-bottom: 0.7rem;
    background: rgba(16, 23, 18, 0.94);
    border: 1px solid var(--line);
  }

  .channels__table tbody tr:nth-child(even) {
    background: rgba(16, 23, 18, 0.94);
  }

  .channels__table tbody td {
    padding: 0.7rem 0.9rem;
    border-bottom: 1px dashed var(--line);
  }

  .channels__table tbody tr td:last-child {
    border-bottom: 0;
  }

  .channels__table tbody td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--fx-stone);
  }
}

@media (min-width: 760px) {
  .contact-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .contact-map__grid {
    grid-template-columns: minmax(280px, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .coord-card {
    position: sticky;
    top: calc(var(--bar-h) + 16px);
  }

  .checklist {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .registry__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .contact-hero__title {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .node:hover {
    transform: none;
  }
}
<<<END>>>