.page-contact {
  --co-border: var(--grid);
  --co-shadow-panel: rgba(6, 13, 28, 0.55);
  padding-bottom: 72px;
}

.page-contact .co-intro {
  display: grid;
  gap: 18px;
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--co-border);
}

.page-contact .co-intro__title {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(30px, 7.2vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-intro__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.84;
}

.page-contact .co-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-contact .co-facts li {
  position: relative;
  padding-left: 12px;
}

.page-contact .co-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  background: var(--lime);
}

/* 双列：左常驻联系牌 + 右内容 */
.page-contact .co-layout {
  display: grid;
  gap: 32px;
  padding-top: 40px;
}

.page-contact .co-main {
  min-width: 0;
  display: grid;
  gap: 56px;
}

/* 联系信息牌 */
.page-contact .co-panel {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 22px 20px 20px;
  background: var(--midnight);
  border: 1px solid var(--co-border);
  border-top: 1px solid var(--lime);
  box-shadow: 0 18px 40px -28px var(--co-shadow-panel);
}

.page-contact .co-panel__badge {
  justify-self: start;
  padding: 3px 9px;
  background: var(--lime);
  color: var(--ink);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.5;
}

.page-contact .co-panel__title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-panel__list {
  display: grid;
  gap: 16px;
  margin: 0;
}

.page-contact .co-panel__row {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--co-border);
}

.page-contact .co-panel__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-panel__row dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-contact .co-panel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 4.2vw, 19px);
  line-height: 1.4;
  letter-spacing: 0.01em;
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .co-panel__value--sm {
  font-size: 14px;
  line-height: 1.6;
  color: var(--steel);
}

.page-contact .co-panel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-contact .co-panel__legal {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--co-border);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

/* 区块通用 */
.page-contact .co-section {
  display: grid;
  gap: 10px;
  padding-bottom: 4px;
}

.page-contact .co-section h2,
.page-contact .co-flow h2,
.page-contact .co-outro h2 {
  margin: 0;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .co-section__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

/* 合作方向卡片 */
.page-contact .co-cards {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px;
  background: var(--ink);
  border: 1px solid var(--co-border);
  transition: border-color var(--t-fast), background var(--t-fast);
}

.page-contact .co-card:hover,
.page-contact .co-card:focus-within {
  border-color: var(--lime);
  background: var(--midnight);
}

.page-contact .co-card__for {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.page-contact .co-card h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .co-card a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast), color var(--t-fast);
}

.page-contact .co-card a:hover,
.page-contact .co-card a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 四步流程 */
.page-contact .co-flow {
  position: relative;
  overflow: hidden;
  padding: 26px 18px 30px;
  background: var(--midnight);
  border: 1px solid var(--co-border);
}

.page-contact .co-flow__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.page-contact .co-flow__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
}

.page-contact .co-steps {
  display: grid;
  gap: 26px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-step {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 10px 10px 10px 6px;
  transition: background var(--t-fast);
}

.page-contact .co-step::after {
  content: "";
  position: absolute;
  left: 26px;
  top: 56px;
  bottom: -26px;
  width: 1px;
  background: var(--co-border);
  transition: background var(--t-fast);
}

.page-contact .co-step:last-child::after {
  display: none;
}

.page-contact .co-step__num {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--ink);
  border: 1px solid var(--co-border);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--lime);
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
}

.page-contact .co-step__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .co-step:hover {
  background: rgba(228, 255, 63, 0.06);
}

.page-contact .co-step:hover .co-step__num {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-contact .co-step:hover::after {
  background: var(--lime);
}

/* 来信自查清单 */
.page-contact .co-check {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-check label {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 16px 16px 14px;
  background: var(--ink);
  border: 1px solid var(--co-border);
  cursor: pointer;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.page-contact .co-check label:hover {
  border-color: var(--lime);
  background: var(--midnight);
}

.page-contact .co-check input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
}

.page-contact .co-check__box {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--steel);
  transition: border-color var(--t-fast);
}

.page-contact .co-check__box::after {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--lime);
  opacity: 0;
  transition: opacity var(--t-fast);
}

.page-contact .co-check input:checked + .co-check__box {
  border-color: var(--lime);
}

.page-contact .co-check input:checked + .co-check__box::after {
  opacity: 1;
}

.page-contact .co-check input:focus-visible + .co-check__box {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-contact .co-check__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-contact .co-check__text strong {
  display: block;
  margin-bottom: 3px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

/* 常见疑问 */
.page-contact .co-faq {
  margin-top: 14px;
  border-top: 1px solid var(--co-border);
}

.page-contact .co-faq details {
  border-bottom: 1px solid var(--co-border);
}

.page-contact .co-faq summary {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  transition: color var(--t-fast);
}

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

.page-contact .co-faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--lime);
}

.page-contact .co-faq details[open] summary::after {
  content: "–";
}

.page-contact .co-faq summary:hover {
  color: var(--lime);
}

.page-contact .co-faq summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-contact .co-faq p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-contact .co-faq p a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--co-border);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-contact .co-faq p a:hover,
.page-contact .co-faq p a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 页尾收束 */
.page-contact .co-outro {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--co-border);
}

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

.page-contact .co-outro__body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  padding: 30px 20px;
  background: linear-gradient(100deg, rgba(6, 13, 28, 0.94) 0%, rgba(11, 23, 48, 0.62) 100%);
}

.page-contact .co-outro__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.86;
}

.page-contact .co-outro__contact {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime);
  opacity: 1;
  overflow-wrap: anywhere;
}

.page-contact .co-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding-top: 18px;
  border-top: 1px solid var(--co-border);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .co-links a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-contact .co-links a:hover,
.page-contact .co-links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* 平板及以上 */
@media (min-width: 640px) {
  .page-contact .co-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .co-flow {
    padding: 32px 26px 36px;
  }

  .page-contact .co-outro__body {
    padding: 40px 32px;
  }
}

/* 桌面：左侧联系牌常驻 */
@media (min-width: 960px) {
  .page-contact {
    padding-bottom: 96px;
  }

  .page-contact .co-intro {
    padding: 34px 0 48px;
  }

  .page-contact .co-layout {
    grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
    gap: 56px;
    padding-top: 52px;
  }

  .page-contact .co-panel {
    position: sticky;
    top: 108px;
    padding: 24px 22px 20px;
  }

  .page-contact .co-main {
    gap: 64px;
  }

  .page-contact .co-steps {
    gap: 30px;
  }

  .page-contact .co-step::after {
    bottom: -30px;
  }
}

@media (min-width: 1200px) {
  .page-contact .co-layout {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 72px;
  }
}
<<<END>>>