.page-contact {
  --co-paper-line: #ded7c8;
  --co-soft: rgba(16, 24, 32, 0.62);
  --co-dark-line: rgba(199, 206, 214, 0.22);
  background: var(--c-snow);
  color: var(--c-ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-contact .co-section {
  padding: clamp(2.75rem, 6vw, 5rem) 0;
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  background: linear-gradient(135deg, var(--c-deep) 0%, var(--c-night) 62%, #0d2a45 100%);
  color: var(--c-snow);
  overflow: hidden;
  border-bottom: 4px solid var(--c-orange);
}

.page-contact .co-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(159, 211, 219, 0.11) 0 1px, transparent 1px 40px);
  pointer-events: none;
}

.page-contact .co-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.5rem;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-contact .co-hero__kicker {
  margin: 0 0 1rem;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ice);
}

.page-contact .co-hero__title {
  margin: 0;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  transform: skewX(-3deg);
  transform-origin: left center;
}

.page-contact .co-hero__text {
  margin: 1.5rem 0 0;
  max-width: 640px;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(247, 249, 252, 0.82);
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.page-contact .co-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--co-dark-line);
  border: 1px solid var(--co-dark-line);
}

.page-contact .co-fact {
  margin: 0;
  padding: 1.15rem 1.1rem;
  background: rgba(11, 27, 51, 0.72);
}

.page-contact .co-fact__key {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-ice);
}

.page-contact .co-fact__val {
  margin: 0.4rem 0 0;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-snow);
}

.page-contact .co-fact__val .mono {
  color: var(--c-orange);
  font-size: 1.6rem;
}

.page-contact .co-fact__note {
  margin: 0.3rem 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(247, 249, 252, 0.6);
}

/* ---------- 通用章节标题 ---------- */
.page-contact .co-head__title {
  margin: 1.5rem 0 0;
  font-size: clamp(1.45rem, 3.1vw, 2.1rem);
  font-weight: 800;
  line-height: 1.25;
}

.page-contact .co-head {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.5rem;
}

.page-contact .co-head__text p {
  margin: 1rem 0 0;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--co-soft);
}

.page-contact .co-head__figure {
  margin: 0;
}

.page-contact .co-head__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--c-silver);
}

.page-contact .media-caption {
  margin-top: 0.65rem;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-alu);
}

/* ---------- 合作方向 ---------- */
.page-contact .co-tracks__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.page-contact .co-track {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1.5rem 1.4rem 1.6rem;
  background: var(--c-paper);
  border: 1px solid var(--co-paper-line);
}

.page-contact .co-track--b,
.page-contact .co-track--d {
  background: #fbf7ee;
}

.page-contact .co-track__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.page-contact .co-track__idx {
  font-size: 2rem;
  line-height: 1;
  color: var(--c-silver);
  font-weight: 700;
}

.page-contact .co-track__title {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 800;
  line-height: 1.35;
}

.page-contact .co-track__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--co-soft);
}

.page-contact .co-track__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
  border-top: 1px solid var(--co-paper-line);
  padding-top: 0.9rem;
}

.page-contact .co-track__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-contact .co-track__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 2px;
  background: var(--c-teal);
}

.page-contact .co-track__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  font-size: 13.5px;
  line-height: 1.55;
}

.page-contact .co-track__meta-k {
  color: var(--c-teal);
  letter-spacing: 0.06em;
  font-size: 12px;
  min-width: 2.6rem;
}

.page-contact .co-track__meta-v {
  color: var(--c-ink);
}

.page-contact .co-track__link {
  align-self: flex-start;
  margin-top: auto;
  color: var(--c-teal);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-contact .co-track__link:hover,
.page-contact .co-track__link:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 合作流程 ---------- */
.page-contact .co-flow {
  background: linear-gradient(180deg, #eef2f7 0%, var(--c-snow) 100%);
}

.page-contact .co-flow__title {
  margin-top: 1.5rem;
}

.page-contact .co-flow__intro {
  margin: 0.85rem 0 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--co-soft);
}

.page-contact .co-steps {
  list-style: none;
  margin: 2.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 2.25rem;
}

.page-contact .co-step {
  position: relative;
  padding-top: 1.35rem;
  border-top: 2px solid var(--c-silver);
  transition: border-color 200ms var(--ease);
}

.page-contact .co-step::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--c-orange);
}

.page-contact .co-step:hover,
.page-contact .co-step:focus-within {
  border-top-color: var(--c-orange);
}

.page-contact .co-step__num {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-teal);
  line-height: 1;
}

.page-contact .co-step__title {
  margin: 0.7rem 0 0;
  font-size: 1.08rem;
  font-weight: 800;
}

.page-contact .co-step__text {
  margin: 0.55rem 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--co-soft);
}

.page-contact .co-step__eta {
  margin: 0.8rem 0 0;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--c-alu);
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-channels {
  background: var(--c-night);
  color: var(--c-snow);
}

.page-contact .co-channels .co-head__title {
  color: var(--c-snow);
}

.page-contact .co-channels__lead {
  margin: 1rem 0 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(247, 249, 252, 0.76);
}

.page-contact .co-channels__grid {
  display: grid;
  gap: 2.25rem;
  margin-top: 2.25rem;
}

.page-contact .co-cards {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.page-contact .co-card {
  padding: 1.4rem 1.35rem;
  background: rgba(11, 27, 51, 0.72);
  border: 1px solid var(--co-dark-line);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .co-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-orange);
}

.page-contact .co-card--mail {
  border-left: 4px solid var(--c-orange);
}

.page-contact .co-card__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-snow);
}

.page-contact .co-card__val {
  margin: 0;
  font-size: clamp(0.98rem, 2.4vw, 1.15rem);
  font-weight: 700;
  color: var(--c-ice);
  word-break: break-all;
}

.page-contact .co-card__val--addr {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--c-snow);
  word-break: normal;
}

.page-contact .co-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 249, 252, 0.68);
}

.page-contact .co-card__btn {
  align-self: flex-start;
  margin-top: 0.35rem;
}

.page-contact .co-channels__side {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-contact .co-side-block {
  padding: 1.25rem 1.2rem;
  border-top: 2px solid var(--c-teal);
  background: rgba(159, 211, 219, 0.08);
}

.page-contact .co-side-block--quiet {
  border-top-color: var(--c-silver);
  background: transparent;
}

.page-contact .co-side-block__title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-snow);
}

.page-contact .co-side-block p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(247, 249, 252, 0.74);
}

.page-contact .co-side-block .link-underline {
  color: var(--c-ice);
}

.page-contact .co-side-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-contact .co-side-list li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 14.5px;
  line-height: 1.65;
  color: rgba(247, 249, 252, 0.78);
}

.page-contact .co-side-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--c-amber);
}

/* ---------- 现场服务台 ---------- */
.page-contact .co-desk__intro {
  margin: 1rem 0 0;
  max-width: 660px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--co-soft);
}

.page-contact .co-desk__figure {
  margin: 2rem 0 0;
  position: relative;
}

.page-contact .co-desk__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  border-top: 1px solid var(--c-silver);
  border-bottom: 1px solid var(--c-silver);
}

.page-contact .co-desk__figure .media-caption {
  max-width: 1320px;
  margin: 0.7rem auto 0;
  padding: 0 clamp(20px, 4vw, 56px);
}

.page-contact .co-desk__list {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.page-contact .co-desk__item {
  position: relative;
  padding: 1.25rem 1.2rem 1.3rem;
  background: var(--c-paper);
  border: 1px solid var(--co-paper-line);
  border-top: 3px solid var(--c-teal);
}

.page-contact .co-desk__idx {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--c-orange);
  line-height: 1;
}

.page-contact .co-desk__title {
  margin: 0.65rem 0 0;
  font-size: 1.06rem;
  font-weight: 800;
}

.page-contact .co-desk__item p {
  margin: 0.55rem 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--co-soft);
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  background: linear-gradient(180deg, var(--c-snow) 0%, #eaf0f5 100%);
}

.page-contact .co-faq__list {
  display: grid;
  gap: 0.85rem;
  margin-top: 2.25rem;
}

.page-contact .co-faq__item {
  background: var(--c-snow);
  border: 1px solid var(--c-silver);
}

.page-contact .co-faq__item[open] {
  border-left: 4px solid var(--c-orange);
}

.page-contact .co-faq__item .fold__summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--c-ink);
}

.page-contact .co-faq__item .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--co-soft);
}

.page-contact .co-faq__tail {
  margin: 2rem 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--co-soft);
}

.page-contact .co-faq__tail .link-underline {
  color: var(--c-teal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .co-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .co-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 4rem;
  }

  .page-contact .co-head {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
    gap: 3rem;
  }

  .page-contact .co-tracks__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 2rem;
  }

  .page-contact .co-track--a {
    grid-column: span 7;
  }

  .page-contact .co-track--b {
    grid-column: span 5;
    margin-top: 3rem;
  }

  .page-contact .co-track--c {
    grid-column: span 5;
  }

  .page-contact .co-track--d {
    grid-column: span 7;
    margin-top: 1.25rem;
  }

  .page-contact .co-channels__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 3rem;
  }

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

@media (max-width: 480px) {
  .page-contact .co-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .co-track__idx {
    font-size: 1.5rem;
  }
}
</style>