.page-contact {
  --contact-grid-line: rgba(220, 227, 223, 0.62);
  background-color: var(--paper);
  color: var(--black);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  padding-bottom: 40px;
  overflow-x: hidden;
}

.page-contact .breadcrumb {
  padding: 16px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}

.page-contact .breadcrumb__item {
  color: var(--slate);
}

.page-contact .breadcrumb__item a {
  color: var(--ink-500);
  text-decoration: none;
}

.page-contact .breadcrumb__item + .breadcrumb__item::before {
  content: " / ";
  color: var(--line);
}

.page-contact .breadcrumb__item[aria-current="page"] {
  color: var(--ink-900);
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  padding: 14px 0 8px;
  background-color: var(--paper);
  background-image: linear-gradient(var(--contact-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
}

.page-contact .contact-hero__frame {
  position: relative;
  margin: 0;
  padding: 24px 18px 22px;
  border: 1px solid var(--line);
  background: rgba(244, 246, 244, 0.94);
}

.page-contact .contact-hero__frame::before,
.page-contact .contact-hero__frame::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  pointer-events: none;
}

.page-contact .contact-hero__frame::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--signal-500);
  border-left: 2px solid var(--signal-500);
}

.page-contact .contact-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--signal-500);
  border-bottom: 2px solid var(--signal-500);
}

.page-contact .contact-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 1.75rem;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .contact-hero__lead {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 通道卡 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  background: #ffffff;
  overflow: hidden;
}

.page-contact .channel-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--signal-500);
}

.page-contact .channel-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .channel-card__value {
  margin: 0;
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.02em;
  line-height: 1.5;
  word-break: break-all;
  background: var(--signal-100);
  color: var(--ink-900);
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .channel-card__meta {
  margin: auto 0 0;
  padding: 10px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .channel-card--mail {
  background: var(--ink-700);
  border-color: var(--ink-700);
}

.page-contact .channel-card--mail .channel-card__no {
  color: var(--signal-100);
}

.page-contact .channel-card--mail .channel-card__title {
  color: var(--paper);
}

.page-contact .channel-card--mail .channel-card__desc {
  color: rgba(244, 246, 244, 0.82);
}

.page-contact .channel-card--mail .channel-card__meta {
  border-top-color: rgba(220, 227, 223, 0.3);
  color: rgba(244, 246, 244, 0.72);
}

.page-contact .channel-card--tel {
  border-top: 3px solid var(--signal-500);
}

.page-contact .channel-card--tel .channel-card__no {
  color: var(--signal-600);
}

.page-contact .channel-card--addr {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--paper);
  min-height: 210px;
}

.page-contact .channel-card--addr > *:not(.channel-card__bg) {
  position: relative;
  z-index: 1;
}

.page-contact .channel-card__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  z-index: 0;
}

.page-contact .channel-card--addr .channel-card__no {
  color: var(--signal-100);
  margin: 0;
}

.page-contact .channel-card--addr .channel-card__title {
  color: var(--paper);
}

.page-contact .channel-card__value--plain {
  background: transparent;
  color: var(--paper);
  padding: 0;
  font-family: var(--font-body);
  font-size: var(--fs-14);
  letter-spacing: 0.01em;
  word-break: normal;
}

.page-contact .channel-card--addr .channel-card__desc {
  color: rgba(244, 246, 244, 0.8);
}

.page-contact .channel-card--addr .channel-card__meta {
  border-top-color: rgba(220, 227, 223, 0.3);
  color: rgba(244, 246, 244, 0.7);
}

/* ---------- 章节通用 ---------- */
.page-contact .contact-section {
  padding: 40px 0 0;
}

.page-contact .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no title"
    "no note";
  gap: 4px 12px;
  align-items: start;
  margin: 0 0 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-contact .section-head__no {
  grid-area: no;
  margin: 0;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--signal-500);
}

.page-contact .section-head__title {
  grid-area: title;
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .section-head__note {
  grid-area: note;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 反馈单 ---------- */
.page-contact .contact-form {
  border: 1px solid var(--line);
  background: #ffffff;
}

.page-contact .contact-field {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 0 12px;
  padding: 15px 14px;
  border-bottom: 1px dashed var(--line);
}

.page-contact .contact-field:last-child {
  border-bottom: 0;
}

.page-contact .contact-field--filled {
  background: rgba(255, 230, 216, 0.32);
}

.page-contact .contact-field__no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate);
  padding-top: 2px;
}

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

.page-contact .contact-field__label {
  display: block;
  margin-bottom: 5px;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-contact .contact-field__hint {
  margin: 0;
  padding-bottom: 4px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate);
  border-bottom: 1px dashed var(--line);
}

.page-contact .contact-field__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--ink-900);
}

/* ---------- 归档咨询 ---------- */
.page-contact .archive-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-contact .archive-copy p {
  margin: 0 0 14px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--black);
  max-width: 36em;
}

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

.page-contact .archive-inline {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  padding: 1px 5px;
  background: var(--line);
  color: var(--ink-900);
}

.page-contact .archive-code {
  display: inline-block;
  padding: 3px 10px;
  margin: 0 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.08em;
  background: var(--archive);
  color: #ffffff;
}

.page-contact .archive-figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.page-contact .archive-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-contact .archive-figure figcaption {
  margin-top: 8px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 处理流程（深色带） ---------- */
.page-contact .contact-section--band {
  margin-top: 40px;
  padding: 34px 0 36px;
  background: var(--ink-900);
  color: var(--paper);
}

.page-contact .contact-section--band .section-head {
  border-bottom-color: rgba(220, 227, 223, 0.28);
}

.page-contact .contact-section--band .section-head__no {
  color: var(--signal-100);
}

.page-contact .contact-section--band .section-head__title {
  color: var(--paper);
}

.page-contact .contact-section--band .section-head__note {
  color: rgba(244, 246, 244, 0.72);
}

.page-contact .process-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .process-step {
  position: relative;
  padding-top: 18px;
  border-top: 1px solid rgba(220, 227, 223, 0.24);
}

.page-contact .process-step__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal-500);
}

.page-contact .process-step__no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--signal-100);
}

.page-contact .process-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .process-step__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(244, 246, 244, 0.75);
}

/* ---------- 纠错与合作 ---------- */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-contact .coop-item {
  padding: 18px 16px 16px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-top-width: 3px;
}

.page-contact .coop-item--fix {
  border-top-color: var(--ink-500);
}

.page-contact .coop-item--reprint {
  border-top-color: var(--archive);
}

.page-contact .coop-item--build {
  border-top-color: var(--indigo);
}

.page-contact .coop-item__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-contact .coop-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--fs-20);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .coop-item__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .coop-details {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-contact .coop-details summary,
.page-contact .address-details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  font-size: var(--fs-14);
  color: var(--ink-500);
  list-style: none;
}

.page-contact .coop-details summary::-webkit-details-marker,
.page-contact .address-details summary::-webkit-details-marker {
  display: none;
}

.page-contact .coop-details summary::marker,
.page-contact .address-details summary::marker {
  content: "";
}

.page-contact .coop-details summary::after,
.page-contact .address-details summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--signal-500);
}

.page-contact .coop-details[open] summary::after,
.page-contact .address-details[open] summary::after {
  content: "－";
}

.page-contact .coop-details ul {
  margin: 10px 0 0;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--slate);
}

.page-contact .coop-details li + li {
  margin-top: 4px;
}

/* ---------- 通信地址 ---------- */
.page-contact .address-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 22px 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--archive);
  background: #ffffff;
}

.page-contact .address-mark {
  width: 72px;
  height: 72px;
  color: var(--ink-700);
}

.page-contact .address-copy__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--archive);
}

.page-contact .address-copy__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .address-copy__text {
  margin: 0 0 8px;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--black);
}

.page-contact .address-copy__note {
  margin: 0 0 14px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .address-details {
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.page-contact .address-details__full {
  margin: 10px 0 0;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  line-height: 1.8;
  background: var(--paper);
  color: var(--ink-900);
  border-left: 2px solid var(--signal-500);
}

/* ---------- 收束 ---------- */
.page-contact .contact-section--closing {
  padding-top: 44px;
}

.page-contact .closing-list {
  border-top: 2px solid var(--ink-900);
  padding-top: 18px;
}

.page-contact .closing-list__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--signal-500);
}

.page-contact .closing-list__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .closing-list ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .closing-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 0 12px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
  align-items: baseline;
}

.page-contact .closing-no {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--signal-500);
}

.page-contact .closing-main {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-contact .closing-link {
  font-size: var(--fs-16);
  line-height: 1.5;
  color: var(--ink-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-contact .closing-link:hover,
.page-contact .closing-link:focus-visible {
  color: var(--signal-600);
  border-bottom-color: var(--signal-500);
}

.page-contact .closing-desc {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 620px) {
  .page-contact .contact-hero__frame {
    padding: 30px 26px 26px;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-card--addr {
    grid-column: span 2;
  }

  .page-contact .contact-field {
    grid-template-columns: 62px minmax(0, 1fr);
    padding: 16px 20px;
  }

  .page-contact .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .address-block {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: 26px 24px;
  }

  .page-contact .address-mark {
    width: 88px;
    height: 88px;
  }
}

@media (min-width: 780px) {
  .page-contact .section-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "no title note";
    align-items: baseline;
    gap: 0 14px;
  }

  .page-contact .section-head__note {
    text-align: right;
    max-width: 22em;
  }

  .page-contact .archive-split {
    grid-template-columns: 7fr 5fr;
    gap: 34px;
    align-items: start;
  }

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

  .page-contact .process-step {
    padding: 20px 22px 0;
    border-top: 1px solid rgba(220, 227, 223, 0.24);
    border-left: 1px solid rgba(220, 227, 223, 0.24);
  }

  .page-contact .process-step:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .process-step:last-child {
    padding-right: 0;
  }

  .page-contact .process-step__dot {
    left: 22px;
  }

  .page-contact .process-step:first-child .process-step__dot {
    left: 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact {
    padding-bottom: 56px;
  }

  .page-contact .contact-hero__title {
    font-size: var(--fs-44);
    max-width: 16em;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .channel-card--mail {
    grid-column: span 5;
  }

  .page-contact .channel-card--tel {
    grid-column: span 4;
  }

  .page-contact .channel-card--addr {
    grid-column: span 3;
  }

  .page-contact .channel-card {
    padding: 22px 20px 18px;
  }

  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .contact-section {
    padding-top: 52px;
  }

  .page-contact .contact-section--band {
    padding: 44px 0 46px;
  }

  .page-contact .address-block {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 40px;
    padding: 32px 30px;
  }

  .page-contact .address-mark {
    width: 112px;
    height: 112px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-contact .contact-hero__frame,
  .page-contact .channel-card {
    animation: contact-rise 600ms ease-out both;
  }

  .page-contact .channel-card:nth-child(2) {
    animation-delay: 90ms;
  }

  .page-contact .channel-card:nth-child(3) {
    animation-delay: 180ms;
  }
}

@keyframes contact-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
<<<END>>>