.page-contact {
  --co-accent: var(--c-deep);
  padding-bottom: 80px;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: 40px 0 32px;
  overflow: hidden;
  isolation: isolate;
}

.page-contact .co-hero__deco,
.page-contact .co-hero__slice {
  position: absolute;
  top: -70px;
  right: -52%;
  width: 100%;
  border-radius: 44px;
  transform: rotate(9deg);
  pointer-events: none;
  z-index: 0;
}

.page-contact .co-hero__deco {
  height: 126%;
  background: var(--c-deep);
  opacity: .07;
}

.page-contact .co-hero__slice {
  height: 22%;
  background: var(--c-amber);
  opacity: .14;
  border-radius: 44px 44px 0 0;
}

.page-contact .co-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .co-hero__kicker {
  margin: 0 0 14px;
  color: var(--c-deep-3);
}

.page-contact .co-hero__title {
  margin: 0 0 18px;
  max-width: 16em;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.page-contact .co-hero__lede {
  max-width: 36em;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--c-ink);
}

.page-contact .co-hero__lede p {
  margin: 0 0 12px;
}

.page-contact .co-hero__lede p:last-child {
  margin-bottom: 0;
}

.page-contact .co-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-hero__facts li {
  padding: 8px 15px;
  border: 1px solid var(--c-mist);
  border-radius: 999px;
  background: var(--c-paper);
  color: var(--c-deep-2);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
}

/* ---------- 通用区块 ---------- */
.page-contact .co-lines,
.page-contact .co-flow,
.page-contact .co-materials,
.page-contact .co-versions,
.page-contact .co-contact,
.page-contact .co-visit {
  margin-top: 60px;
}

.page-contact .co-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-l);
  background: var(--c-fog);
}

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

.page-contact .co-figure figcaption {
  padding: 11px 15px 13px;
  background: var(--c-paper);
  color: var(--c-graphite);
  font-family: var(--font-display);
  font-size: 12.5px;
  line-height: 1.5;
}

/* ---------- 三条合作线 ---------- */
.page-contact .co-lines__top {
  display: grid;
  gap: 24px;
}

.page-contact .co-lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}

.page-contact .co-line {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 22px 24px;
  overflow: hidden;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-l);
  background: var(--c-paper);
  box-shadow: var(--shadow);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-contact .co-line::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: var(--co-accent);
}

.page-contact .co-line--a { --co-accent: var(--c-deep); }
.page-contact .co-line--b { --co-accent: var(--c-deep-2); }
.page-contact .co-line--c { --co-accent: var(--c-deep-3); }

.page-contact .co-line:hover,
.page-contact .co-line:focus-within {
  transform: translateY(-2px);
  border-color: var(--c-amber-soft);
  box-shadow: 0 12px 28px rgba(11, 37, 69, .16);
}

.page-contact .co-line__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--co-accent);
}

.page-contact .co-line__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .co-line__body {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-graphite);
}

.page-contact .co-line__spec {
  display: grid;
  gap: 12px;
  margin: auto 0 0;
  padding: 0;
}

.page-contact .co-line__spec dt {
  margin-bottom: 3px;
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--c-deep-3);
}

.page-contact .co-line__spec dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-contact .co-lines__note {
  margin: 24px 0 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-graphite);
}

.page-contact .co-lines__note a {
  color: var(--c-deep-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 流程四步 ---------- */
.page-contact .co-flow__top {
  display: grid;
  gap: 24px;
}

.page-contact .co-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-step {
  position: relative;
  padding: 22px 20px 24px;
  border-radius: var(--r-m);
  background: var(--c-fog);
  border: 1px solid transparent;
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-contact .co-step:hover,
.page-contact .co-step:focus-within {
  border-color: var(--c-amber-soft);
  background: var(--c-paper);
}

.page-contact .co-step__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: var(--c-deep);
  color: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .06em;
}

.page-contact .co-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-ink);
}

.page-contact .co-step__time {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 11px;
  border-radius: 999px;
  background: var(--c-paper);
  color: var(--c-warn);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
}

.page-contact .co-step__body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-graphite);
}

/* ---------- 材料清单 ---------- */
.page-contact .co-materials__grid {
  display: grid;
  gap: 26px;
}

.page-contact .co-checklist {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-checklist__item {
  display: flex;
  gap: 12px;
  padding: 15px 16px;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-s);
  background: var(--c-paper);
}

.page-contact .co-checklist__box {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border: 2px solid var(--c-deep-3);
  border-radius: 4px;
}

.page-contact .co-checklist__label {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-contact .co-checklist__desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.68;
  color: var(--c-graphite);
}

/* ---------- 早前版本 ---------- */
.page-contact .co-versions__card {
  padding: 30px 24px 28px;
  border-radius: var(--r-l);
  border-left: 6px solid var(--c-amber);
  background: var(--c-paper);
  box-shadow: var(--shadow);
}

.page-contact .co-versions__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.32;
  color: var(--c-ink);
}

.page-contact .co-versions__body {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-graphite);
}

.page-contact .co-versions__template {
  display: block;
  margin: 0 0 14px;
  padding: 14px 16px;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-s);
  background: var(--c-fog);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.6;
  word-break: break-word;
}

.page-contact .co-versions__hint {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-graphite);
}

.page-contact .co-versions__hint a {
  color: var(--c-deep-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 联系区 ---------- */
.page-contact .co-contact__panel {
  position: relative;
  overflow: hidden;
  padding: 40px 24px 36px;
  border-radius: 24px;
  background: var(--c-deep);
  color: var(--c-paper);
}

.page-contact .co-contact__panel::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -120px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: var(--c-deep-3);
  opacity: .55;
}

.page-contact .co-contact__body {
  position: relative;
  z-index: 1;
}

.page-contact .co-contact__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-contact .co-contact__lede {
  margin: 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .co-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 28px 0 0;
  padding: 0;
}

.page-contact .co-contact__label {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--c-mist);
  opacity: .82;
}

.page-contact .co-contact__value {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.5;
  color: var(--c-paper);
}

.page-contact .co-contact__value--hl {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  color: var(--c-amber);
  word-break: break-all;
}

.page-contact .co-contact__note {
  margin: 26px 0 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-contact .co-contact__note a {
  color: var(--c-amber-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 信件与到访 ---------- */
.page-contact .co-visit__grid {
  display: grid;
  gap: 24px;
}

.page-contact .co-visit__card {
  padding: 26px 22px;
  border: 1px solid var(--c-mist);
  border-radius: var(--r-l);
  background: var(--c-fog);
}

.page-contact .co-visit__label {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--c-deep-3);
}

.page-contact .co-visit__addr {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--c-ink);
}

.page-contact .co-visit__hint {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-graphite);
}

.page-contact .co-visit__mono {
  margin: 0;
  color: var(--c-deep-3);
  font-size: 13px;
}

/* ---------- 焦点可见性 ---------- */
.page-contact a:focus-visible,
.page-contact .co-line:focus-visible,
.page-contact .co-step:focus-visible {
  outline: 2px solid var(--c-amber);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-contact .co-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .co-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 32px;
  }
}

@media (min-width: 820px) {
  .page-contact .co-lines__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .co-step::after {
    content: "";
    position: absolute;
    top: 42px;
    left: calc(100% + 1px);
    width: 16px;
    height: 2px;
    background: var(--c-mist);
  }

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

@media (min-width: 900px) {
  .page-contact .co-hero {
    padding: 64px 0 56px;
  }

  .page-contact .co-hero__deco,
  .page-contact .co-hero__slice {
    right: -8%;
    width: 46%;
    opacity: 1;
  }

  .page-contact .co-hero__deco {
    height: 132%;
  }

  .page-contact .co-hero__slice {
    height: 20%;
  }

  .page-contact .co-hero__inner {
    max-width: 56%;
  }

  .page-contact .co-hero__title {
    font-size: 52px;
  }

  .page-contact .co-lines__top {
    grid-template-columns: 1.15fr .85fr;
    align-items: end;
    gap: 36px;
  }

  .page-contact .co-flow__top {
    grid-template-columns: 1.2fr .8fr;
    align-items: center;
    gap: 36px;
  }

  .page-contact .co-materials__grid {
    grid-template-columns: .78fr 1.22fr;
    align-items: start;
    gap: 40px;
  }

  .page-contact .co-versions__card {
    padding: 38px 40px 34px;
  }

  .page-contact .co-contact__panel {
    padding: 52px 48px 46px;
  }

  .page-contact .co-contact__title {
    font-size: 32px;
  }

  .page-contact .co-visit__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 40px;
  }

  .page-contact .co-visit__card {
    padding: 30px 28px;
  }
}
<<<END>>>