.page-contact {
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  padding: 0 0 88px;
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 560px;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(61, 242, 210, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(61, 242, 210, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0) 92%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0) 92%);
  pointer-events: none;
}

.page-contact__shell {
  position: relative;
  z-index: 1;
  padding-top: 28px;
}

.page-contact a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 面包屑 */
.page-contact .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-contact .breadcrumb__link {
  color: var(--grey-blue);
  text-decoration: none;
}

.page-contact .breadcrumb__link:hover {
  color: var(--cyan);
}

.page-contact .breadcrumb__sep {
  color: var(--ink-700);
}

.page-contact .breadcrumb__current {
  color: var(--paper);
}

/* 首屏 */
.contact-hero {
  max-width: 880px;
  padding-bottom: 8px;
}

.contact-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.contact-hero__kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}

.contact-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.contact-hero__lede {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--grey-blue);
}

/* 标签 */
.pc-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.05em;
}

.pc-tag--cyan {
  background: var(--cyan);
  color: var(--ink-900);
}

.pc-tag--slate {
  background: var(--slate);
  color: var(--paper-warm);
}

.pc-tag--orange {
  background: transparent;
  color: var(--orange);
  border-color: var(--orange);
}

/* 联系方式 + 时间线 */
.contact-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 34px;
}

.contact-card {
  position: relative;
  padding: 26px 22px 26px 28px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-xl);
  background: linear-gradient(158deg, var(--ink-800) 0%, var(--ink-900) 78%);
  overflow: hidden;
}

.contact-card::before {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 0;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 100%);
}

.contact-card__title {
  margin: 14px 0 4px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.contact-list {
  margin: 8px 0 0;
  padding: 0;
}

.contact-row {
  display: grid;
  gap: 5px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--ink-700);
}

.contact-row:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.contact-row__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey-blue);
}

.contact-row__value {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
  word-break: break-word;
}

.contact-row__value--mono {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.contact-row__value--addr {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}

.contact-row__hint {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--grey-blue);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 180ms var(--ease), color 180ms var(--ease),
    border-color 180ms var(--ease), transform 180ms var(--ease);
}

.contact-btn--primary {
  background: var(--cyan);
  color: var(--ink-900);
}

.contact-btn--primary:hover {
  background: var(--cyan-soft);
  transform: translateY(-2px);
}

.contact-btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--ink-700);
}

.contact-btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

/* 时间线面板 */
.contact-flow {
  padding: 26px 22px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-xl);
  background: var(--ink-800);
}

.contact-flow__num,
.scope__num,
.version__num,
.ops__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.contact-flow__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.flow-list {
  position: relative;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.flow-list::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 11px;
  border-left: 1px dashed var(--ink-700);
}

.flow-step {
  position: relative;
  padding: 0 0 22px 40px;
}

.flow-step:last-child {
  padding-bottom: 0;
}

.flow-step__dot {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  transition: transform 180ms var(--ease), background-color 180ms var(--ease),
    color 180ms var(--ease);
}

.flow-step:hover .flow-step__dot {
  background: var(--cyan);
  color: var(--ink-900);
  transform: scale(1.12);
}

.flow-step__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.flow-step__meta {
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.flow-step__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey-blue);
}

.flow-step__need {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-soft);
}

.flow-step__need li::before {
  content: "— ";
  color: var(--cyan);
}

@media (hover: hover) and (pointer: fine) {
  .page-contact .flow-step__need {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 220ms var(--ease), opacity 220ms var(--ease),
      margin-top 220ms var(--ease);
  }

  .page-contact .flow-step:hover .flow-step__need {
    max-height: 180px;
    margin-top: 8px;
    opacity: 1;
  }
}

.contact-flow__figure {
  margin: 24px 0 0;
}

.page-contact .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--ink-700);
  background: var(--ink-900);
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .media-frame__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--ink-900);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .media-frame__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--grey-blue);
  background: var(--ink-800);
}

/* 受理范围 */
.scope {
  margin-top: 64px;
  scroll-margin-top: 120px;
}

.scope__head {
  max-width: 640px;
}

.scope__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--paper);
}

.scope__note {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey-blue);
}

.scope__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.scope-item {
  padding: 22px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.scope-item:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.scope-item__title {
  margin: 14px 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.scope-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--grey-blue);
}

.scope-tip {
  padding: 22px;
  border: 1px dashed var(--orange);
  border-radius: var(--radius-lg);
  background: rgba(255, 138, 61, 0.09);
}

.scope-tip__title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--orange);
}

.scope-tip__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--paper-warm);
}

.scope-tip__list li {
  position: relative;
  padding-left: 18px;
}

.scope-tip__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1.5px solid var(--orange);
}

/* 版本对照 */
.version {
  margin-top: 56px;
}

.version__body {
  padding: 28px 22px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 100% 0%, rgba(61, 242, 210, 0.12) 0%, rgba(61, 242, 210, 0) 58%),
    var(--ink-800);
}

.version__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.version__text {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey-blue);
}

.version__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.version__list li {
  padding: 14px 16px;
  border-left: 3px solid var(--slate);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(52, 80, 106, 0.28);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper-warm);
}

.version__list .mono {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.version__links {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--grey-blue);
}

.version__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 210, 0.4);
  padding-bottom: 1px;
}

.version__links a:hover {
  border-bottom-color: var(--cyan);
}

/* 运营与备案 */
.ops {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--ink-700);
}

.ops__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.ops__text {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--grey-blue);
}

.ops__facts {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper-warm);
}

.ops__facts li {
  padding-left: 16px;
  position: relative;
}

.ops__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1.5px;
  background: var(--cyan);
}

.ops__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

@media (min-width: 640px) {
  .page-contact__shell {
    padding-top: 36px;
  }

  .contact-hero__title {
    font-size: 44px;
  }

  .contact-hero__lede {
    font-size: 17px;
  }

  .contact-card,
  .contact-flow {
    padding: 30px;
  }

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

  .scope-tip {
    grid-column: span 2;
  }

  .scope__title,
  .version__title {
    font-size: 30px;
  }

  .version__body {
    padding: 34px 32px;
  }
}

@media (min-width: 900px) {
  .contact-board {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
    align-items: start;
  }

  .ops {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 40px;
  }
}

@media (min-width: 1100px) {
  .contact-hero__title {
    font-size: 52px;
  }

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

  .scope-tip {
    grid-column: span 3;
  }

  .scope__title,
  .version__title {
    font-size: 32px;
  }

  .ops__title {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-btn,
  .page-contact .scope-item,
  .page-contact .flow-step__dot {
    transition: none;
  }

  .page-contact .scope-item:hover,
  .page-contact .contact-btn:hover {
    transform: none;
  }
}
<<<END>>>