.page-contact {
  --cc-shell: 940px;
  --cc-gap: clamp(16px, 2.4vw, 24px);
  position: relative;
  overflow-x: clip;
  color: var(--text);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(760px 420px at 6% 0%, rgba(124, 77, 255, .18), transparent 68%),
    radial-gradient(620px 360px at 100% 12%, rgba(56, 242, 224, .09), transparent 70%);
  background-repeat: no-repeat;
  padding-block: clamp(20px, 4vw, 40px) clamp(64px, 9vw, 112px);
}

.page-contact .contact-shell {
  max-width: var(--cc-shell);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 头部 ---------- */
.page-contact .contact-hero {
  padding-bottom: clamp(24px, 4vw, 38px);
}

.page-contact .contact-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .contact-hero__eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-contact .contact-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(36px, 6.2vw, 66px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-contact .contact-hero__lede {
  margin: 0 0 22px;
  max-width: 48ch;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 26, 44, .72);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-dim);
}

.page-contact .contact-hero__meta li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(70, 227, 155, .14);
}

/* ---------- 头部横幅 ---------- */
.page-contact .contact-banner {
  position: relative;
  margin: 0 0 clamp(40px, 6vw, 64px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
  aspect-ratio: 16 / 7;
}

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

.page-contact .contact-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(56, 242, 224, .05) 0 1px, transparent 1px 5px);
}

/* ---------- 章节骨架 ---------- */
.page-contact .section {
  margin-bottom: clamp(44px, 6.4vw, 76px);
}

.page-contact .section--last {
  margin-bottom: 0;
}

.page-contact .section__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-contact .section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--purple-lt);
}

.page-contact .section__title {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .section__lede {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 联系渠道卡片 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--cc-gap);
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(20, 26, 44, .92), rgba(14, 18, 32, .92));
  transition: border-color .2s ease, background-color .2s ease;
}

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

.page-contact .channel-card__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .channel-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--purple-lt);
  text-decoration: none;
  word-break: break-word;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .16s ease, border-color .16s ease;
}

.page-contact .channel-card__value:hover,
.page-contact .channel-card__value:focus-visible {
  color: var(--text);
  border-bottom-color: var(--purple-lt);
}

.page-contact .channel-card__value--plain {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: default;
}

.page-contact .channel-card__text {
  margin: 0;
  flex: 1;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .channel-card__foot {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--orange);
}

/* ---------- 渠道纹理图 ---------- */
.page-contact .channel-visual {
  position: relative;
  margin: var(--cc-gap) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
  aspect-ratio: 3 / 1;
  min-height: 140px;
}

.page-contact .channel-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .72;
}

/* ---------- 纠错三步 ---------- */
.page-contact .fix-steps {
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}

.page-contact .fix-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  padding: clamp(18px, 2.6vw, 24px) clamp(18px, 2.8vw, 26px);
  background: var(--ink-800);
}

.page-contact .fix-step__idx {
  padding-top: 4px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-contact .fix-step__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
}

.page-contact .fix-step__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .fix-note {
  padding: clamp(18px, 2.6vw, 24px);
  border: 1px solid rgba(255, 154, 60, .34);
  border-radius: var(--r-lg);
  background: rgba(255, 154, 60, .06);
}

.page-contact .fix-note__lead {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-contact .fix-note p:last-child {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 合作共建 ---------- */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--cc-gap);
  margin-bottom: clamp(16px, 2.4vw, 22px);
}

.page-contact .coop-card {
  padding: clamp(18px, 2.6vw, 24px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--purple);
  border-radius: var(--r-md);
  background: rgba(14, 18, 32, .88);
  transition: border-color .2s ease;
}

.page-contact .coop-card:hover {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-contact .coop-card__title {
  margin: 0 0 8px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.page-contact .coop-card__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .coop-foot {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-mute);
}

/* ---------- 备案 ---------- */
.page-contact .filing {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-contact .filing__list {
  display: grid;
  gap: 14px;
  margin: 0 0 18px;
  padding: 0;
}

.page-contact .filing__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.page-contact .filing__row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .filing__row dt {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--text-mute);
}

.page-contact .filing__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--text);
}

.page-contact .filing__more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--purple-lt);
  list-style: none;
}

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

.page-contact .filing__more summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .filing__more[open] summary::before {
  content: "−";
}

.page-contact .filing__more p {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--text-dim);
}

/* ---------- 收尾链接 ---------- */
.page-contact .next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--cc-gap);
}

.page-contact .next-link {
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(14, 18, 32, .8);
  text-decoration: none;
  transition: border-color .2s ease, background-color .2s ease;
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  border-color: var(--purple);
  background: rgba(58, 36, 134, .22);
}

.page-contact .next-link__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .next-link__text {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 焦点态 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 1040px) {
  .page-contact .next-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .coop-card,
  .page-contact .next-link {
    transition: none;
  }
}