.page-contact {
  --co-accent-a: var(--orange-600);
  --co-accent-b: var(--terracotta);
  --co-accent-c: var(--cyan-deep);
  --co-soft: rgba(245, 241, 232, .78);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 58%, var(--navy-700) 100%);
  color: var(--cream);
  padding: clamp(1.25rem, 4vw, 2.25rem) 0 clamp(2.25rem, 6vw, 4rem);
}

.page-contact .co-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(58deg, rgba(245, 241, 232, .055) 0 1px, transparent 1px 28px);
  pointer-events: none;
}

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

.page-contact .co-hero .breadcrumb {
  color: var(--co-soft);
  font-size: .85rem;
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-contact .co-hero .breadcrumb a {
  color: var(--cyan-400);
  text-decoration: none;
}

.page-contact .co-hero .breadcrumb a:hover,
.page-contact .co-hero .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-contact .co-hero__layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-contact .co-hero__intro .eyebrow {
  color: var(--cyan-400);
  margin-bottom: .75rem;
}

.page-contact .co-hero h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.4vw, 3rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  margin: 0 0 1rem;
}

.page-contact .co-hero .lede {
  color: var(--co-soft);
  font-size: clamp(.98rem, 2.4vw, 1.08rem);
  line-height: 1.85;
  max-width: 40rem;
  margin: 0 0 1.75rem;
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-contact .co-hero__media {
  margin: 0;
  position: relative;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
  background: var(--navy-700);
}

.page-contact .co-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.03);
}

/* ---------- 章节通用 ---------- */
.page-contact .section {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0;
}

.page-contact .co-section-head {
  display: grid;
  gap: .6rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
  padding-left: 1rem;
  border-left: 3px solid var(--orange-600);
}

.page-contact .section-title {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .7rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 1.7rem);
  line-height: 1.3;
  color: var(--carbon);
  margin: 0;
}

.page-contact .section-title__index {
  font-size: .9rem;
  letter-spacing: .1em;
  color: var(--orange-600);
  font-weight: 700;
}

.page-contact .co-section-note {
  margin: 0;
  max-width: 46rem;
  color: var(--ink-soft);
  font-size: .95rem;
  line-height: 1.8;
}

/* ---------- 三条合作线 ---------- */
.page-contact .co-track-grid {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: 1fr;
}

.page-contact .co-track {
  display: flex;
  flex-direction: column;
  gap: .7rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--co-accent-a);
  padding: clamp(1.15rem, 3vw, 1.6rem);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .co-track--b { border-left-color: var(--co-accent-b); }
.page-contact .co-track--c { border-left-color: var(--co-accent-c); }

.page-contact .co-track:hover,
.page-contact .co-track:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.page-contact .co-track__no {
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--orange-600);
  margin: 0;
}

.page-contact .co-track--b .co-track__no { color: var(--co-accent-b); }
.page-contact .co-track--c .co-track__no { color: var(--co-accent-c); }

.page-contact .co-track .panel__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.4;
  color: var(--carbon);
  margin: 0;
}

.page-contact .co-track__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .co-track__fit {
  margin: auto 0 0;
  padding-top: .85rem;
  border-top: 1px dashed var(--line-strong);
  font-size: .83rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 场馆章节 ---------- */
.page-contact .co-venue-section {
  background: linear-gradient(180deg, var(--cream) 0%, var(--white) 100%);
}

.page-contact .co-venue {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .co-venue__media {
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 0 100%);
  background: var(--navy-700);
}

.page-contact .co-venue__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
}

.page-contact .co-venue__body p {
  margin: 0 0 1rem;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--carbon);
}

.page-contact .co-venue__link {
  color: var(--ink-soft) !important;
  font-size: .9rem !important;
}

.page-contact .co-venue__body a {
  color: var(--orange-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 87, 46, .4);
}

.page-contact .co-venue__body a:hover,
.page-contact .co-venue__body a:focus-visible {
  border-bottom-color: var(--orange-600);
}

.page-contact .co-venue__side {
  background: var(--navy-800);
  color: var(--cream);
  padding: clamp(1.15rem, 3vw, 1.6rem);
  border-top: 4px solid var(--terracotta);
}

.page-contact .co-venue__side-title {
  margin: 0 0 .85rem;
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--cyan-400);
}

.page-contact .co-venue__list {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .6rem;
}

.page-contact .co-venue__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--co-soft);
}

.page-contact .co-venue__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  background: var(--cyan-400);
  transform: rotate(45deg);
}

.page-contact .co-venue__note {
  margin: 0;
  padding-top: .9rem;
  border-top: 1px solid var(--line-light);
  font-size: .82rem;
  line-height: 1.75;
  color: rgba(245, 241, 232, .62);
}

/* ---------- 流程条 ---------- */
.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: co-step;
}

.page-contact .co-step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  padding: 1.15rem 1.15rem 1.35rem;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .co-step:hover,
.page-contact .co-step:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan-400);
}

.page-contact .co-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--orange-600);
  letter-spacing: .04em;
}

.page-contact .co-step__no::after {
  content: "";
  display: block;
  width: 100%;
  height: 2px;
  margin-top: .55rem;
  background: linear-gradient(90deg, var(--cyan-400) 0%, rgba(53, 208, 186, 0) 100%);
}

.page-contact .co-step__title {
  margin: .8rem 0 .5rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--carbon);
}

.page-contact .co-step p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 材料清单 ---------- */
.page-contact .co-prepare {
  background: var(--cream);
}

.page-contact .co-materials {
  display: grid;
  gap: .7rem;
  grid-template-columns: 1fr;
}

.page-contact .co-material {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  background: var(--white);
  border-left: 3px solid var(--stone);
  padding: .9rem 1rem;
}

.page-contact .co-material:nth-child(3n + 1) { border-left-color: var(--orange-600); }
.page-contact .co-material:nth-child(3n + 2) { border-left-color: var(--terracotta); }
.page-contact .co-material:nth-child(3n) { border-left-color: var(--moss); }

.page-contact .co-material__no {
  flex: none;
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--stone);
  padding-top: .15rem;
}

.page-contact .co-material p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .co-material strong {
  color: var(--carbon);
}

/* ---------- 响应时效 ---------- */
.page-contact .co-response {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--navy-800);
  color: var(--cream);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 0 100%);
}

.page-contact .co-response__title {
  margin: 0 0 .9rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.2rem, 3.2vw, 1.5rem);
  color: var(--cream);
}

.page-contact .co-response__clock {
  margin: 0 0 .6rem;
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--cyan-400);
  letter-spacing: .04em;
}

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

.page-contact .co-response__tips-title {
  margin: 0 0 .8rem;
  font-size: .95rem;
  font-weight: 700;
  color: var(--cream);
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--line-light);
}

.page-contact .co-response__tips ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .65rem;
}

.page-contact .co-response__tips li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .89rem;
  line-height: 1.78;
  color: var(--co-soft);
}

.page-contact .co-response__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 2px;
  background: var(--terracotta);
}

/* ---------- 联系方式 ---------- */
.page-contact .co-contact {
  background: var(--cream);
  border: 1px solid var(--line-strong);
  border-top: 4px solid var(--orange-600);
  padding: clamp(1.25rem, 4vw, 2.25rem);
}

.page-contact .co-contact__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.page-contact .co-contact__item {
  padding-left: 1rem;
  border-left: 3px solid var(--navy-700);
}

.page-contact .co-contact__label {
  margin: 0;
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--ink-soft);
}

.page-contact .co-contact__value {
  margin: .4rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(.92rem, 2.6vw, 1.08rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--carbon);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .co-contact__hint {
  margin: .5rem 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .co-contact__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  margin: 1.5rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--line-strong);
  font-size: .87rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  display: grid;
  gap: .7rem;
}

.page-contact .co-faq__item {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--navy-700);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .co-faq__item[open] {
  border-left-color: var(--orange-600);
}

.page-contact .co-faq__item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  font-weight: 600;
  font-size: .96rem;
  line-height: 1.6;
  color: var(--carbon);
  list-style: none;
}

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

.page-contact .co-faq__item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--cyan-deep);
}

.page-contact .co-faq__item[open] summary::after {
  content: "–";
  color: var(--orange-600);
}

.page-contact .co-faq__item summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-contact .co-faq__body {
  padding: 0 1.15rem 1.15rem;
}

.page-contact .co-faq__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .co-faq__body a {
  color: var(--orange-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 87, 46, .4);
}

.page-contact .co-faq__body a:hover,
.page-contact .co-faq__body a:focus-visible {
  border-bottom-color: var(--orange-600);
}

/* ---------- 结尾行动 ---------- */
.page-contact .co-outro-section {
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.page-contact .co-outro {
  display: grid;
  gap: 1.5rem;
  background: var(--navy-900);
  color: var(--cream);
  border-top: 4px solid var(--orange-600);
  padding: clamp(1.5rem, 4vw, 2.75rem);
}

.page-contact .co-outro__title {
  margin: 0 0 .75rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.25rem, 3.4vw, 1.6rem);
  color: var(--cream);
}

.page-contact .co-outro__text p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--co-soft);
}

.page-contact .co-outro__text .mono {
  font-family: var(--font-mono);
  color: var(--cyan-400);
  overflow-wrap: anywhere;
}

.page-contact .co-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .co-materials {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 768px) {
  .page-contact .co-track-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .co-response {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-contact .co-hero__layout {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }

  .page-contact .co-venue {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    align-items: start;
  }

  .page-contact .co-venue__media {
    grid-column: 1 / -1;
  }

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

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

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

  .page-contact .co-outro {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: center;
  }

  .page-contact .co-outro__links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-track,
  .page-contact .co-step,
  .page-contact .co-faq__item {
    transition: none;
  }

  .page-contact .co-track:hover,
  .page-contact .co-track:focus-within,
  .page-contact .co-step:hover,
  .page-contact .co-step:focus-within {
    transform: none;
  }
}