.page-contact {
  --c-radius: 2px;
  background: var(--night);
  overflow-x: hidden;
}

.page-contact .breadcrumb {
  padding: 22px 0 10px;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 100% at 90% 6%, rgba(31, 169, 122, 0.22), transparent 58%),
    radial-gradient(100% 90% at 2% 96%, rgba(124, 77, 255, 0.18), transparent 62%),
    var(--night);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(154, 167, 180, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 167, 180, 0.06) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 76%);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 36px 0 46px;
}

.page-contact .contact-hero .eyebrow {
  margin: 0 0 16px;
  color: var(--neon);
}

.page-contact .contact-hero h1 {
  margin: 0 0 20px;
  max-width: 12em;
  font-family: var(--font-data);
  font-weight: 800;
  font-size: clamp(30px, 5vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__lead {
  margin: 0 0 28px;
  max-width: 46ch;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
}

.page-contact .contact-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .contact-hero__visual {
  position: relative;
  margin: 0;
  background: var(--night-deep);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-contact .contact-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(11, 27, 51, 0.52), rgba(11, 27, 51, 0) 58%);
  pointer-events: none;
}

.page-contact .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: 52px;
    padding: 66px 0 78px;
  }
}

/* ---------- 深色区标题色 ---------- */

.page-contact .contact-channels .section__title,
.page-contact .contact-coop .section__title {
  color: var(--paper);
}

.page-contact .contact-channels .section__lead,
.page-contact .contact-coop .section__lead {
  color: var(--mist);
}

.page-contact .contact-flow .eyebrow,
.page-contact .contact-kit .eyebrow {
  color: var(--grass);
}

.page-contact .contact-flow .section__title,
.page-contact .contact-kit .section__title {
  color: var(--ink);
}

.page-contact .contact-flow .section__lead,
.page-contact .contact-kit .section__lead {
  color: rgba(14, 22, 33, 0.72);
}

.page-contact .contact-coop .eyebrow {
  color: var(--violet);
}

/* ---------- 联络渠道 ---------- */

.page-contact .contact-channels {
  background: var(--night-deep);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: -1px;
  width: 2px;
  background: var(--blaze);
}

.page-contact .channel-card__kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--blaze);
}

.page-contact .channel-card__title {
  margin: 0;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.1vw, 22px);
  line-height: 1.35;
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-card__value--addr {
  font-family: var(--font-data);
  font-size: clamp(16px, 1.9vw, 20px);
  letter-spacing: 0.02em;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .copy-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  margin-top: auto;
  padding: 10px 12px;
  background: var(--night);
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  color: var(--mist);
  font-family: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-contact .copy-chip:hover,
.page-contact .copy-chip:focus-visible {
  border-color: var(--neon);
  color: var(--paper);
  outline: none;
}

.page-contact .copy-chip.is-copied {
  border-color: var(--grass);
  background: rgba(31, 169, 122, 0.18);
}

.page-contact .copy-chip__label {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .copy-chip__value {
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-contact .copy-chip__cue {
  flex: none;
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-contact .copy-chip.is-copied .copy-chip__value,
.page-contact .copy-chip.is-copied .copy-chip__cue {
  color: var(--neon);
}

@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 勘误四步 ---------- */

.page-contact .contact-flow {
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.page-contact .flow-rail {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid rgba(14, 22, 33, 0.18);
}

.page-contact .flow-step {
  padding: 24px 0;
  border-bottom: 1px solid rgba(14, 22, 33, 0.12);
}

.page-contact .flow-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0 0 16px;
  border-radius: 50%;
  background: var(--night);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-contact .flow-step__title {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(14, 22, 33, 0.76);
}

.page-contact .flow-more {
  margin-top: 14px;
  border-top: 1px dashed rgba(14, 22, 33, 0.22);
}

.page-contact .flow-more > summary {
  padding: 12px 0 4px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--grass);
  cursor: pointer;
  list-style: none;
}

.page-contact .flow-more > summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-more > summary::after {
  content: " ＋";
  font-family: var(--font-mono);
  color: var(--grass);
}

.page-contact .flow-more[open] > summary::after {
  content: " －";
}

.page-contact .flow-more p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(14, 22, 33, 0.7);
}

.page-contact .flow-more a,
.page-contact .kit-item a {
  color: var(--grass);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 900px) {
  .page-contact .flow-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow-step {
    padding: 26px 20px;
    border-bottom: 0;
    border-left: 1px solid rgba(14, 22, 33, 0.12);
  }

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

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

/* ---------- 准备材料 ---------- */

.page-contact .contact-kit {
  background: var(--paper-2);
  border-top: 1px solid rgba(14, 22, 33, 0.1);
}

.page-contact .kit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-contact .kit-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-contact .kit-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(14, 22, 33, 0.13);
}

.page-contact .kit-item:first-child {
  border-top: 1px solid rgba(14, 22, 33, 0.13);
}

.page-contact .kit-item__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--grass);
}

.page-contact .kit-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(14, 22, 33, 0.8);
}

.page-contact .kit-item strong {
  color: var(--ink);
  font-weight: 700;
}

.page-contact .kit-visual {
  margin: 0;
}

@media (min-width: 940px) {
  .page-contact .kit-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
  }
}

/* ---------- 合作与引用 ---------- */

.page-contact .contact-coop {
  background: var(--night);
  border-top: 1px solid var(--line);
}

.page-contact .coop-tabs {
  position: relative;
  margin-top: 30px;
}

.page-contact .coop-tabs__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-contact .coop-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.page-contact .coop-tabs__label {
  display: inline-block;
  padding: 9px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  color: var(--mist);
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-contact .coop-tabs__label:hover {
  border-color: var(--neon);
  color: var(--paper);
}

.page-contact #coop-content:checked ~ .coop-tabs__bar [for="coop-content"],
.page-contact #coop-quote:checked ~ .coop-tabs__bar [for="coop-quote"],
.page-contact #coop-reprint:checked ~ .coop-tabs__bar [for="coop-reprint"],
.page-contact #coop-offline:checked ~ .coop-tabs__bar [for="coop-offline"] {
  background: rgba(53, 224, 176, 0.16);
  border-color: var(--neon);
  color: var(--neon);
}

.page-contact .coop-tabs__input:focus-visible ~ .coop-tabs__bar {
  outline: 1px dashed var(--neon);
  outline-offset: 6px;
}

.page-contact .coop-tabs__panel {
  display: none;
  padding: 24px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-contact #coop-content:checked ~ .coop-tabs__panels > [data-panel="content"],
.page-contact #coop-quote:checked ~ .coop-tabs__panels > [data-panel="quote"],
.page-contact #coop-reprint:checked ~ .coop-tabs__panels > [data-panel="reprint"],
.page-contact #coop-offline:checked ~ .coop-tabs__panels > [data-panel="offline"] {
  display: block;
}

.page-contact .coop-tabs__title {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 20px;
  color: var(--paper);
}

.page-contact .coop-tabs__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .coop-tabs__text a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .mail-subject {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin: 20px 0 0;
  padding: 14px 16px;
  background: var(--night-deep);
  border: 1px solid var(--line);
  border-left: 2px solid var(--violet);
}

.page-contact .mail-subject__key {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .mail-subject__val {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 响应时效 ---------- */

.page-contact .contact-response {
  background: var(--night-deep);
  border-top: 1px solid var(--line);
}

.page-contact .response-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 22px 20px;
  background: linear-gradient(100deg, rgba(255, 194, 75, 0.16), rgba(255, 194, 75, 0) 72%);
  border: 1px solid rgba(255, 194, 75, 0.45);
  border-left: 3px solid var(--amber);
}

.page-contact .response-band__kicker {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-contact .response-band__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-contact .response-band__value span {
  margin-left: 6px;
  font-size: 18px;
  letter-spacing: 0.08em;
}

.page-contact .response-band__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .response-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 20px;
}

.page-contact .response-note {
  padding: 20px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line-soft);
}

.page-contact .response-note__title {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
}

.page-contact .response-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .response-note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 860px) {
  .page-contact .response-band {
    grid-template-columns: auto auto minmax(0, 1fr);
    align-items: center;
    gap: 26px;
    padding: 24px 28px;
  }

  .page-contact .response-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

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