.page-contact {
  display: block;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-contact .co-crumbs-wrap {
  padding-block: 1.15rem 0.25rem;
}

/* ---------- 首屏：对角线分区 ---------- */
.page-contact .co-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: 1.75rem 2.75rem;
  background: linear-gradient(168deg, var(--midnight) 0%, #1b2b4d 58%, #24375e 100%);
  color: var(--cream);
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -30%;
  right: -22%;
  width: 78%;
  height: 170%;
  background: linear-gradient(155deg, rgba(230, 57, 70, 0.92), rgba(244, 162, 97, 0.42) 58%, transparent 92%);
  transform: skewX(-14deg);
  opacity: 0.5;
  transform-origin: top right;
}

.page-contact .co-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.page-contact .co-hero .eyebrow,
.page-contact .co-hero__eyebrow {
  color: var(--gold);
  margin: 0 0 0.75rem;
}

.page-contact .co-hero__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-contact .co-hero__lead {
  max-width: 48ch;
  margin: 0 0 1.6rem;
  font-size: clamp(0.98rem, 0.3vw + 0.95rem, 1.1rem);
  color: rgba(255, 248, 240, 0.86);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-contact .co-hero__numbers {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
  margin-top: 1.9rem;
  padding-top: 1.35rem;
  border-top: 1px solid rgba(255, 248, 240, 0.16);
}

.page-contact .co-hero__num strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-contact .co-hero__num span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: rgba(255, 248, 240, 0.72);
}

.page-contact .co-hero__media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.38);
}

.page-contact .co-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 主体：左主栏 + 右侧固定联系卡 ---------- */
.page-contact .co-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-block: 2.5rem 3.5rem;
}

.page-contact .co-main {
  min-width: 0;
}

.page-contact .co-block {
  padding-bottom: 2.1rem;
  margin-bottom: 2.1rem;
  border-bottom: 1px dashed var(--line);
}

.page-contact .co-block:last-of-type {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-block__head {
  max-width: 62ch;
}

.page-contact .co-block__head h2 {
  margin: 0.35rem 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 1.1vw + 1.2rem, 2.05rem);
  line-height: 1.15;
  color: var(--ink);
}

.page-contact .co-block__head p {
  margin: 0;
  color: var(--graphite);
  font-size: 0.96rem;
}

/* 合作方向 */
.page-contact .co-dirs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.4rem;
}

.page-contact .co-dir {
  position: relative;
  padding: 1.35rem 1.2rem 1.25rem 1.35rem;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.page-contact .co-dir::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--red);
}

.page-contact .co-dir:nth-child(2)::before { background: var(--gold); }
.page-contact .co-dir:nth-child(3)::before { background: var(--teal); }
.page-contact .co-dir:nth-child(4)::before { background: var(--ink); }

.page-contact .co-dir__idx {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-contact .co-dir h3 {
  margin: 0 0 0.4rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .co-dir p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--graphite);
}

/* 服务内容 */
.page-contact .co-svc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1.3rem;
}

.page-contact .co-svc {
  padding: 1.2rem 1.2rem 1.15rem;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-contact .co-svc[hidden] {
  display: none;
}

.page-contact .co-svc h3 {
  margin: 0.6rem 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .co-svc p {
  margin: 0;
  font-size: 0.91rem;
  color: var(--graphite);
}

/* 对接流程 */
.page-contact .co-process__media {
  margin-top: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .co-process__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-contact .co-steps {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-contact .co-step {
  position: relative;
  padding: 0 0 1.7rem 3.1rem;
}

.page-contact .co-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 1.05rem;
  top: 2.35rem;
  bottom: 0.3rem;
  width: 2px;
  background: linear-gradient(180deg, var(--red), var(--gold));
  opacity: 0.55;
}

.page-contact .co-step__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 2.15rem;
  height: 2.15rem;
  display: grid;
  place-items: center;
  border-radius: 0.62rem;
  background: var(--ink);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  transform: rotate(-4deg);
}

.page-contact .co-step h3 {
  margin: 0.2rem 0 0.35rem;
  font-size: 1.03rem;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .co-step p {
  margin: 0 0 0.4rem;
  font-size: 0.92rem;
  color: var(--graphite);
}

.page-contact .co-step p.co-step__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--teal);
}

/* 合作网络 */
.page-contact .co-net {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.4rem;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .co-net__cell {
  padding: 1.15rem 1rem;
  background: #ffffff;
}

.page-contact .co-net__cell strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-contact .co-net__cell:nth-child(1) strong { color: var(--red); }
.page-contact .co-net__cell:nth-child(2) strong { color: var(--red-deep); }
.page-contact .co-net__cell:nth-child(3) strong { color: var(--teal); }
.page-contact .co-net__cell:nth-child(4) strong { color: var(--ink); }

.page-contact .co-net__cell span {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.8rem;
  color: var(--graphite);
  line-height: 1.45;
}

.page-contact .co-cases {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .co-cases li {
  position: relative;
  padding: 0.8rem 1rem 0.8rem 1.6rem;
  background: var(--mist);
  border-radius: 0.6rem;
  font-size: 0.9rem;
  color: var(--graphite);
}

.page-contact .co-cases li::before {
  content: "";
  position: absolute;
  left: 0.7rem;
  top: 1.15rem;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--gold);
}

.page-contact .co-cases strong {
  color: var(--ink);
}

.page-contact .co-net__more {
  margin: 1.1rem 0 0;
  font-size: 0.88rem;
  color: var(--graphite);
}

.page-contact .co-net__more a {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-contact .co-net__more a:hover {
  color: var(--red);
}

/* 资料清单 */
.page-contact .co-check {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-contact .co-check__item {
  position: relative;
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  padding: 1.05rem 1.1rem;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-contact .co-check__item:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
}

.page-contact .co-check__item input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.page-contact .co-check__box {
  flex: 0 0 auto;
  width: 1.2rem;
  height: 1.2rem;
  margin-top: 0.18rem;
  border: 2px solid var(--ink);
  border-radius: 0.32rem;
  background: var(--cream);
  display: grid;
  place-items: center;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .co-check__box::after {
  content: "";
  width: 0.5rem;
  height: 0.28rem;
  margin-top: -0.12rem;
  border-left: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
  transform: rotate(-45deg) scale(0);
  transition: transform 0.16s var(--ease);
}

.page-contact .co-check__item input:checked + .co-check__box {
  background: var(--red);
  border-color: var(--red);
}

.page-contact .co-check__item input:checked + .co-check__box::after {
  transform: rotate(-45deg) scale(1);
}

.page-contact .co-check__item input:focus-visible + .co-check__box {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

.page-contact .co-check__text strong {
  display: block;
  margin-bottom: 0.18rem;
  font-size: 0.95rem;
  color: var(--ink);
}

.page-contact .co-check__text span {
  display: block;
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--graphite);
}

/* ---------- 右侧联系卡 ---------- */
.page-contact .co-side {
  min-width: 0;
}

.page-contact .co-side__card {
  position: relative;
  margin-top: 1.5rem;
  padding: 1.5rem 1.35rem;
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.92), rgba(255, 248, 240, 0.76));
  border: 1px solid rgba(29, 53, 87, 0.12);
  box-shadow: var(--shadow-md);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  overflow: hidden;
}

.page-contact .co-side__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--red), var(--gold) 55%, var(--teal));
}

.page-contact .co-side .eyebrow,
.page-contact .co-side__eyebrow {
  color: var(--red);
  margin: 0 0 0.4rem;
}

.page-contact .co-side__title {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--ink);
}

.page-contact .co-side__text {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--graphite);
}

.page-contact .co-side__list {
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .co-side__list > div {
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--line);
}

.page-contact .co-side__list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-side__list dt {
  margin-bottom: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-contact .co-side__list dd {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .co-side__list dd a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-contact .co-side__list dd a:hover {
  color: var(--red);
}

.page-contact .co-side__note {
  margin: 0 0 1rem;
  padding: 0.7rem 0.85rem;
  font-size: 0.79rem;
  line-height: 1.6;
  color: var(--ink);
  background: rgba(244, 162, 97, 0.18);
  border-radius: 0.6rem;
}

.page-contact .co-side__btn {
  display: block;
  text-align: center;
}

.page-contact .co-side__icp {
  margin: 0.9rem 0 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-contact .co-hero__numbers {
    gap: 2rem 2.5rem;
  }

  .page-contact .co-net__cell {
    padding: 1.3rem 1.15rem;
  }
}

@media (min-width: 680px) {
  .page-contact .co-dirs,
  .page-contact .co-svc-grid,
  .page-contact .co-check {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero {
    padding-block: 2.5rem 3.5rem;
  }

  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 3.25rem;
    align-items: center;
  }

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

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

@media (min-width: 1000px) {
  .page-contact .co-layout {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 3rem;
    padding-block: 3.5rem 5rem;
    align-items: start;
  }

  .page-contact .co-side {
    position: sticky;
    top: calc(var(--head-h) + 1.25rem);
  }

  .page-contact .co-side__card {
    margin-top: 0;
  }
}

@media (min-width: 1100px) {
  .page-contact .co-steps {
    padding-left: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-hero__title {
    transform: none;
  }

  .page-contact .co-step__num,
  .page-contact .co-check__box,
  .page-contact .co-check__box::after,
  .page-contact .co-check__item {
    transition: none;
  }
}
<<<END>>>