.page-contact {
  --co-line: rgba(246, 243, 236, .14);
  --co-line-strong: rgba(246, 243, 236, .3);
  --co-glass: rgba(20, 40, 61, .62);
  --co-ink-line: rgba(11, 23, 38, .14);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-contact .co-crumb {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
}

.page-contact .co-eyebrow {
  color: var(--mint);
}

.page-contact .co-eyebrow--dark {
  color: var(--rust);
}

.page-contact .co-h1 {
  margin: .5rem 0 0;
  font-size: clamp(2.3rem, 7.2vw, 4.9rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-contact .co-h2 {
  margin: .6rem 0 0;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.005em;
}

.page-contact .co-h2--dark {
  color: var(--ink);
}

.page-contact .co-lede {
  margin: 1.4rem 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- Hero ---------- */
.page-contact .co-hero {
  position: relative;
  padding-block: clamp(1.25rem, 3.5vw, 2.25rem) clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 85% at 88% -10%, rgba(20, 40, 61, .95), rgba(11, 23, 38, 0) 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink) 62%, var(--ink-soft) 100%);
}

.page-contact .co-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-contact .co-kinds {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  gap: .1rem 1.75rem;
}

.page-contact .co-kind {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .62rem 0;
  border-bottom: 1px solid var(--co-line);
  font-size: .95rem;
  color: var(--paper);
}

.page-contact .co-kind__no {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--mint);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem;
  margin-top: 1.9rem;
}

.page-contact .co-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .85rem 1.5rem;
  font-size: .95rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}

.page-contact .co-btn--mint {
  background: var(--mint);
  color: var(--ink);
}

.page-contact .co-btn--mint:hover,
.page-contact .co-btn--mint:focus-visible {
  background: var(--paper);
  color: var(--ink);
}

.page-contact .co-copy {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .34rem .7rem;
  background: rgba(95, 242, 194, .08);
  border: 1px solid rgba(95, 242, 194, .45);
  border-radius: 2px;
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .co-copy:hover,
.page-contact .co-copy:focus-visible {
  background: rgba(95, 242, 194, .2);
  border-color: var(--mint);
}

.page-contact .co-copy--outline {
  padding: .8rem 1.3rem;
  font-size: .82rem;
  background: transparent;
  border-color: var(--co-line-strong);
  color: var(--paper);
  border-radius: 2px;
}

.page-contact .co-copy--outline:hover,
.page-contact .co-copy--outline:focus-visible {
  border-color: var(--mint);
  color: var(--mint);
  background: rgba(95, 242, 194, .07);
}

.page-contact .co-copy[data-state="copied"] {
  background: var(--mint);
  color: var(--ink);
  border-color: var(--mint);
}

.page-contact .co-copy[data-state="copied"]::after {
  content: "已复制";
  font-family: var(--font-sans);
  font-size: .7rem;
  letter-spacing: 0;
}

.page-contact .co-hero__aside {
  position: relative;
  display: grid;
  gap: 1rem;
}

.page-contact .co-shot {
  position: relative;
  margin: 0;
  border: 1px solid var(--co-line-strong);
  background:
    repeating-linear-gradient(90deg, rgba(95, 242, 194, .07) 0 1px, transparent 1px 34px),
    var(--ink-soft);
  overflow: hidden;
}

.page-contact .co-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-contact .co-shot__cap {
  padding: .7rem .9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .03em;
  color: var(--mist);
  border-top: 1px solid var(--co-line);
}

.page-contact .co-glass {
  padding: 1.25rem 1.3rem 1.35rem;
  background: var(--co-glass);
  border: 1px solid rgba(95, 242, 194, .26);
  border-radius: 3px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-contact .co-glass__label {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .co-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .7rem;
  padding: .6rem 0;
  border-top: 1px solid var(--co-line);
}

.page-contact .co-line__k {
  flex: 0 0 auto;
  min-width: 2.6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-contact .co-line__v {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: .86rem;
  line-height: 1.6;
  color: var(--paper);
  text-decoration: none;
  word-break: break-word;
}

.page-contact a.co-line__v:hover,
.page-contact a.co-line__v:focus-visible {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .co-glass__note {
  margin: .95rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid var(--co-line);
  font-size: .82rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .co-address {
  padding: 1.1rem 1.25rem 1.2rem;
  background: var(--rust);
  color: var(--paper);
  border-radius: 2px;
}

.page-contact .co-address__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: rgba(246, 243, 236, .82);
}

.page-contact .co-address__v {
  margin: .4rem 0 0;
  font-size: clamp(.95rem, 1.6vw, 1.05rem);
  font-weight: 700;
  line-height: 1.6;
}

/* ---------- 数据条 ---------- */
.page-contact .co-strip {
  padding-block: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--ink-soft);
  border-top: 1px solid var(--co-line);
  border-bottom: 1px solid var(--co-line);
}

.page-contact .co-strip__grid {
  display: grid;
  gap: 1.4rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-strip__item {
  padding-left: 1rem;
  border-left: 2px solid var(--rust);
}

.page-contact .co-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1.2;
  color: var(--paper);
  letter-spacing: -.01em;
}

.page-contact .co-num__unit {
  margin-left: .18rem;
  font-size: .62em;
  color: var(--mint);
}

.page-contact .co-cap {
  margin: .45rem 0 0;
  font-size: .84rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 区块头 ---------- */
.page-contact .co-sec-head {
  max-width: 62ch;
}

.page-contact .co-sec-note {
  margin: 1rem 0 0;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作流程 ---------- */
.page-contact .co-flow-sec {
  padding-block: clamp(2.75rem, 6vw, 5rem);
  background: var(--ink);
}

.page-contact .co-flow__stage {
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.25rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-shot--flow {
  border-color: var(--co-line);
}

.page-contact .co-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--co-line);
  border-top: 1px solid var(--co-line);
  border-bottom: 1px solid var(--co-line);
}

.page-contact .co-flow__item {
  position: relative;
  padding: 1.4rem 1.15rem 1.5rem;
  background: var(--ink);
  transition: background .4s var(--ease);
}

.page-contact .co-flow__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--rust);
  transition: width .45s var(--ease), background .45s var(--ease);
}

.page-contact .co-flow__item:hover,
.page-contact .co-flow__item:focus-within {
  background: var(--ink-soft);
}

.page-contact .co-flow__item:hover::before,
.page-contact .co-flow__item:focus-within::before {
  width: 100%;
  background: var(--mint);
}

.page-contact .co-flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-contact .co-flow__title {
  margin: .55rem 0 .5rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .co-flow__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .co-flow__extra {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  line-height: 1.7;
  color: var(--mint);
  transition: max-height .45s var(--ease), opacity .3s var(--ease), margin-top .45s var(--ease);
}

.page-contact .co-flow__item:hover .co-flow__extra,
.page-contact .co-flow__item:focus-within .co-flow__extra {
  max-height: 8rem;
  opacity: 1;
  margin-top: .7rem;
}

/* ---------- 合作方 ---------- */
.page-contact .co-partners {
  padding-block: clamp(2.75rem, 6vw, 5rem);
  background: var(--paper);
  color: var(--ink);
}

.page-contact .co-partners .co-sec-note {
  color: var(--stone);
}

.page-contact .co-partners__list {
  list-style: none;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .co-partner {
  padding: 1.5rem 0 1.6rem;
  border-top: 1px solid var(--co-ink-line);
}

.page-contact .co-partner__no {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--rust);
}

.page-contact .co-partner__title {
  margin: .4rem 0 .55rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 700;
  color: var(--ink);
}

.page-contact .co-partner__tag {
  display: inline-block;
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
}

.page-contact .co-partner__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: #2C3A48;
}

.page-contact .co-partner__gain {
  margin: .7rem 0 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--rust);
}

/* ---------- 常见咨询 ---------- */
.page-contact .co-faq {
  padding-block: clamp(2.75rem, 6vw, 5rem);
  background: var(--ink-soft);
  color: var(--paper);
}

.page-contact .co-faq__list {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  border-bottom: 1px solid var(--co-line-strong);
}

.page-contact .co-details {
  border-top: 1px solid var(--co-line-strong);
}

.page-contact .co-details summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 0;
  font-size: .98rem;
  font-weight: 700;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-details summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--mint);
}

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

.page-contact .co-details summary:hover,
.page-contact .co-details summary:focus-visible {
  color: var(--mint);
}

.page-contact .co-details p {
  margin: 0 0 1.25rem;
  max-width: 66ch;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .co-inline-link {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .co-inline-link:hover,
.page-contact .co-inline-link:focus-visible {
  color: var(--mint);
}

/* ---------- 下一步 ---------- */
.page-contact .co-next {
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
  background: var(--ink);
  border-top: 1px solid var(--co-line);
}

.page-contact .co-next__inner {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-contact .co-next__note {
  margin: 1rem 0 0;
  max-width: 42ch;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .co-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--co-line);
  border-top: 1px solid var(--co-line);
  border-bottom: 1px solid var(--co-line);
}

.page-contact .co-next__link {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.1rem;
  background: var(--ink);
  text-decoration: none;
  color: var(--paper);
  transition: background .3s var(--ease), padding-left .3s var(--ease);
}

.page-contact .co-next__link span {
  font-size: 1rem;
  font-weight: 700;
}

.page-contact .co-next__link em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: .74rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-contact .co-next__link:hover,
.page-contact .co-next__link:focus-visible {
  background: var(--ink-soft);
  padding-left: 1.4rem;
}

.page-contact .co-next__link:hover span,
.page-contact .co-next__link:focus-visible span {
  color: var(--mint);
}

/* ---------- 焦点可见性 ---------- */
.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-contact .co-kinds {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-contact .co-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-strip__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.75rem;
  }

  .page-contact .co-partners__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(1.75rem, 4vw, 3.5rem);
  }

  .page-contact .co-next__inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 960px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-contact .co-glass {
    position: relative;
    z-index: 2;
    margin: -4.25rem 0 0 clamp(1rem, 3vw, 2.5rem);
  }

  .page-contact .co-address {
    margin: 1rem 0 0 clamp(2.25rem, 5vw, 3.75rem);
  }

  .page-contact .co-flow__stage {
    grid-template-columns: minmax(0, .38fr) minmax(0, .62fr);
    align-items: start;
  }

  .page-contact .co-shot--flow {
    position: sticky;
    top: calc(var(--bar-h) + 1.5rem);
  }
}

@media (max-width: 859px) {
  .page-contact .co-flow__extra {
    max-height: none;
    opacity: 1;
    margin-top: .7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-btn,
  .page-contact .co-copy,
  .page-contact .co-flow__item,
  .page-contact .co-flow__extra,
  .page-contact .co-flow__item::before,
  .page-contact .co-next__link {
    transition: none;
  }

  .page-contact .co-flow__item:hover .co-flow__extra,
  .page-contact .co-flow__item:focus-within .co-flow__extra {
    max-height: none;
  }
}
<<<END>>>