.page-contact {
  --paper-ink: #0A1A2F;
  --paper-muted: rgba(10, 26, 47, 0.68);
  --paper-line: rgba(10, 26, 47, 0.14);
  --paper-soft: rgba(10, 26, 47, 0.05);
}

.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(1.8rem, 4.5vw, 3rem);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-contact .contact-hero .eyebrow {
  margin: 0;
}

.page-contact .contact-hero__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.8rem, 9vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-contact .contact-hero__lede {
  max-width: 54ch;
  margin: 1.1rem 0 0;
  font-size: clamp(0.98rem, 2.2vw, 1.08rem);
  line-height: 1.78;
  color: var(--cold);
}

.page-contact .contact-hero__meta {
  max-width: 60ch;
  margin: 0.9rem 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--stone);
}

.page-contact .contact-hero__orb {
  position: absolute;
  right: -3rem;
  top: 46%;
  width: clamp(140px, 24vw, 280px);
  aspect-ratio: 1 / 1;
  transform: translateY(-50%);
  border-radius: 50%;
  border: 1px solid var(--line-glow);
  background: radial-gradient(circle at 34% 32%, rgba(41, 185, 164, 0.34), rgba(41, 185, 164, 0.05) 62%, transparent 74%);
  pointer-events: none;
}

@media (max-width: 47.99rem) {
  .page-contact .contact-hero__orb {
    display: none;
  }
}

/* ---------- 分栏 ---------- */

.page-contact .contact-split {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vw, 3.4rem);
}

@media (min-width: 64rem) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-contact .contact-column .figure {
  margin: 1.4rem 0 1.8rem;
}

/* ---------- 渠道列表 ---------- */

.page-contact .channels {
  border-bottom: 1px solid var(--line);
}

.page-contact .channel {
  border-top: 1px solid var(--line);
  transition: border-color 0.22s var(--ease);
}

.page-contact .channel:hover {
  border-color: var(--lake);
}

.page-contact .channel[open] {
  border-color: var(--line-glow);
}

.page-contact .channel__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.25rem 0.85rem;
  align-items: center;
  padding: 1.05rem 0.2rem;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .channel__head:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 2px;
}

.page-contact .channel__idx {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--glow);
  letter-spacing: 0.06em;
}

.page-contact .channel__name {
  font-size: 1.14rem;
  font-weight: 600;
  color: var(--cream);
  letter-spacing: -0.01em;
}

.page-contact .channel__mark {
  position: relative;
  width: 1rem;
  height: 1rem;
}

.page-contact .channel__mark::before,
.page-contact .channel__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--lake);
  transform: translate(-50%, -50%);
  transition: transform 0.22s var(--ease);
}

.page-contact .channel__mark::before {
  width: 12px;
  height: 1.5px;
}

.page-contact .channel__mark::after {
  width: 1.5px;
  height: 12px;
}

.page-contact .channel[open] .channel__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-contact .channel__hint {
  grid-column: 2 / 4;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--stone);
}

.page-contact .channel__body {
  padding: 0.2rem 0.2rem 1.4rem;
}

.page-contact .channel__intro {
  margin: 0 0 0.85rem;
  max-width: 60ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--cold);
}

.page-contact .channel__list {
  margin: 0 0 0.3rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--stone);
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--lake);
}

.page-contact .reach {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  align-items: baseline;
  margin: 0.95rem 0 0;
  padding: 0.7rem 0.9rem;
  border: 1px dashed var(--line);
  border-radius: 12px 3px 12px 3px;
  background: rgba(41, 185, 164, 0.05);
}

.page-contact .reach__k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-contact .reach__v {
  font-family: var(--font-mono);
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--glow);
  user-select: all;
  word-break: break-all;
}

.page-contact .channel__body .note {
  margin: 0.7rem 0 0;
}

/* ---------- 米白面板 ---------- */

.page-contact .paper {
  background: var(--cream);
  color: var(--paper-ink);
  border-radius: 4px 30px 4px 30px;
  padding: clamp(1.35rem, 3.2vw, 2.2rem);
  box-shadow: 0 30px 60px -44px rgba(0, 0, 0, 0.95);
}

.page-contact .paper__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 3.4vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper-ink);
}

.page-contact .paper__sub {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--paper-muted);
}

.page-contact .checklist {
  counter-reset: ck;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.8rem;
}

.page-contact .checklist li {
  counter-increment: ck;
  position: relative;
  padding-left: 2.5rem;
  font-size: 0.93rem;
  line-height: 1.68;
  color: var(--paper-ink);
}

.page-contact .checklist li::before {
  content: counter(ck, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: #2A7F73;
  border-bottom: 2px solid var(--clay);
  padding-bottom: 1px;
}

.page-contact .checklist strong {
  font-weight: 700;
}

.page-contact .samples {
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--paper-line);
}

.page-contact .samples__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  font-weight: 700;
  color: var(--paper-muted);
}

.page-contact .sample {
  border-top: 1px solid var(--paper-line);
}

.page-contact .sample__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--paper-ink);
}

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

.page-contact .sample__summary:focus-visible {
  outline: 2px solid #2A7F73;
  outline-offset: 2px;
}

.page-contact .sample__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 0.85rem;
  height: 0.85rem;
}

.page-contact .sample__toggle::before,
.page-contact .sample__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--clay);
  transform: translate(-50%, -50%);
}

.page-contact .sample__toggle::before {
  width: 11px;
  height: 1.5px;
}

.page-contact .sample__toggle::after {
  width: 1.5px;
  height: 11px;
  transition: transform 0.22s var(--ease);
}

.page-contact .sample[open] .sample__toggle::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-contact .sample__pre {
  margin: 0 0 1rem;
  padding: 0.85rem 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.9;
  color: #13233A;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--paper-soft);
  border-left: 3px solid var(--clay);
  border-radius: 0 8px 8px 0;
}

/* ---------- 流程长卷 ---------- */

.page-contact .contact-flow {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-contact .flow-wrap {
  margin-top: 1.2rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding-bottom: 0.9rem;
}

.page-contact .flow-wrap:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 4px;
}

.page-contact .flow {
  display: block;
  width: 100%;
  min-width: 640px;
  height: auto;
}

.page-contact .flow__node {
  fill: none;
  stroke: var(--lake);
  stroke-width: 1.4;
}

.page-contact .flow__node--key {
  stroke: var(--flag);
}

.page-contact .flow__link {
  stroke: var(--amber);
  stroke-width: 1.5;
  stroke-dasharray: 7 7;
}

.page-contact .flow__num {
  fill: var(--glow);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  text-anchor: middle;
}

.page-contact .flow__num--key {
  fill: var(--flag);
  font-size: 15px;
}

.page-contact .flow__label {
  fill: var(--cream);
  font-family: var(--font-body);
  font-size: 17px;
  text-anchor: middle;
}

.page-contact .flow__sub {
  fill: var(--stone);
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-anchor: middle;
}

/* ---------- 合作 ---------- */

.page-contact .section {
  padding-block: clamp(2rem, 5vw, 3.2rem);
}

.page-contact .coop {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

@media (min-width: 48rem) {
  .page-contact .coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .coop__item {
  padding: 1.15rem 1.15rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 14px 3px 14px 3px;
  background: linear-gradient(180deg, rgba(28, 38, 53, 0.72), rgba(14, 21, 34, 0.72));
  transition: border-color 0.22s var(--ease), translate 0.22s var(--ease);
}

.page-contact .coop__item:hover {
  border-color: var(--lake);
  translate: 0 -3px;
}

.page-contact .coop__item .chip {
  margin: 0 0 0.7rem;
}

.page-contact .coop__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-contact .coop__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 回音时效 ---------- */

.page-contact .timing {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.2rem;
  padding: 1.4rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 48rem) {
  .page-contact .timing {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.6rem;
  }
}

.page-contact .timing__cell {
  padding-left: 0.9rem;
  border-left: 2px solid var(--lake);
}

.page-contact .timing__cell:nth-child(2) {
  border-left-color: var(--amber);
}

.page-contact .timing__cell:nth-child(3) {
  border-left-color: var(--moss);
}

.page-contact .timing__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.6vw, 1.85rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--glow);
}

.page-contact .timing__label {
  margin: 0.45rem 0 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--cream);
}

.page-contact .timing__note {
  margin: 0.4rem 0 0;
  font-size: 0.82rem;
  line-height: 1.68;
  color: var(--stone);
}

.page-contact .section__note {
  margin: 1.2rem 0 0;
  max-width: 62ch;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 来信地址 ---------- */

.page-contact .postal {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.4rem);
  border-top: 1px solid var(--line-soft);
}

@media (min-width: 60rem) {
  .page-contact .postal {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
  }
}

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

.page-contact .postal__body .section__head {
  margin-top: 0;
}

.page-contact .postal__addr {
  display: grid;
  gap: 0.35rem;
  margin: 1.1rem 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line-glow);
  border-radius: 3px 18px 3px 18px;
  background: rgba(41, 185, 164, 0.06);
}

.page-contact .postal__k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-contact .postal__v {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--cream);
  user-select: all;
}

.page-contact .postal__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.page-contact .postal__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--stone);
}

.page-contact .postal__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 7px;
  height: 1px;
  background: var(--clay);
}

/* ---------- 延伸入口 ---------- */

.page-contact .next {
  border-top: 1px solid var(--line-soft);
}

.page-contact .next__list {
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.1rem;
}

.page-contact .next__list li {
  border-top: 1px solid var(--line-soft);
}

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

.page-contact .next__list .more-link {
  display: block;
  padding: 0.9rem 0.2rem;
}

.page-contact .next__list .more-link:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel__mark::before,
  .page-contact .channel__mark::after,
  .page-contact .sample__toggle::after,
  .page-contact .coop__item {
    transition: none;
  }

  .page-contact .coop__item:hover {
    translate: 0 0;
  }
}
<<<END>>>