.page-contact {
  --co-pad: clamp(48px, 7vw, 96px);
  --co-gap: clamp(16px, 2.2vw, 24px);
  color: var(--fg);
}

.page-contact .breadcrumb {
  padding-top: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 var(--co-pad);
  overflow: hidden;
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(720px, 78vw);
  height: min(720px, 78vw);
  background: radial-gradient(circle, rgba(122, 43, 255, 0.16) 0%, rgba(255, 106, 31, 0.08) 38%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .co-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.page-contact .co-hero__title {
  margin: clamp(14px, 2vw, 22px) 0 0;
  font-size: clamp(2.25rem, 7.4vw, 5.25rem);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -0.02em;
}

.page-contact .co-hero__lede {
  max-width: 48ch;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  color: var(--fg-muted);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
}

.page-contact .co-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}

.page-contact .co-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  background: var(--ink-800);
}

.page-contact .co-fact__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}

.page-contact .co-fact__label {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3.4vw, 38px);
}

.page-contact .co-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
  transform: rotate(-1.2deg);
  box-shadow: 0 26px 60px -42px rgba(0, 0, 0, 0.95);
}

.page-contact .co-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-contact .co-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.1) 0%, rgba(11, 18, 32, 0.72) 100%);
  pointer-events: none;
}

.page-contact .co-hero__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  margin: 0;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--ice);
}

/* ---------- 合作方式 ---------- */
.page-contact .co-ways {
  padding: var(--co-pad) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-ways__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--co-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-contact .co-way {
  position: relative;
  padding: clamp(24px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 28, 46, 0.92) 0%, rgba(11, 18, 32, 0.62) 100%);
  transition: border-color 0.24s ease, transform 0.24s ease, box-shadow 0.24s ease;
}

.page-contact .co-way:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
  box-shadow: 0 20px 44px -34px rgba(255, 106, 31, 0.65);
}

.page-contact .co-way__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  opacity: 0.9;
}

.page-contact .co-way__title {
  margin: 14px 0 0;
  font-size: clamp(1.12rem, 1.8vw, 1.3rem);
  font-weight: 800;
  color: var(--ice);
}

.page-contact .co-way__desc {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

.page-contact .co-way__fit {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--green);
}

@media (hover: hover) and (pointer: fine) {
  .page-contact .co-way__fit {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.28s ease, opacity 0.28s ease, margin-top 0.28s ease, padding-top 0.28s ease;
  }

  .page-contact .co-way:hover .co-way__fit,
  .page-contact .co-way:focus-within .co-way__fit {
    max-height: 9em;
    margin-top: 14px;
    padding-top: 12px;
    border-top-color: var(--line);
    opacity: 1;
  }
}

/* ---------- 流程带 ---------- */
.page-contact .co-flow {
  position: relative;
  padding: var(--co-pad) 0;
  overflow: hidden;
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-flow__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .co-flow__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-contact .co-flow__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--ink-900) 0%, rgba(11, 18, 32, 0.86) 42%, var(--ink-900) 100%);
}

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

.page-contact .co-flow__track {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 34px);
  margin-top: clamp(30px, 4.4vw, 52px);
}

.page-contact .co-flow__track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, var(--line) 10%, var(--line) 90%, transparent 100%);
}

.page-contact .co-step {
  position: relative;
  padding-left: 32px;
}

.page-contact .co-step__dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 5px rgba(87, 242, 164, 0.13);
  animation: co-breathe 1.6s ease-in-out infinite;
}

@keyframes co-breathe {
  0%, 100% { box-shadow: 0 0 0 5px rgba(87, 242, 164, 0.13); }
  50% { box-shadow: 0 0 0 9px rgba(87, 242, 164, 0.05); }
}

.page-contact .co-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-contact .co-step__title {
  margin: 8px 0 0;
  font-size: clamp(1.05rem, 1.7vw, 1.2rem);
  font-weight: 800;
  color: var(--ice);
}

.page-contact .co-step__text {
  margin: 10px 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

.page-contact .co-step__more {
  margin-top: 12px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.page-contact .co-step__more summary {
  display: inline-block;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--green);
  transition: color 0.2s ease;
}

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

.page-contact .co-step__more summary::before {
  content: "＋ ";
}

.page-contact .co-step__more[open] summary::before {
  content: "－ ";
}

.page-contact .co-step__more summary:hover {
  color: var(--orange);
}

.page-contact .co-step__more p {
  margin: 10px 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--fg-muted);
}

/* ---------- 合作方类型（浅色区） ---------- */
.page-contact .co-partners {
  padding: var(--co-pad) 0;
  color: var(--brown);
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-partners .section-title {
  color: var(--brown);
}

.page-contact .co-partners .eyebrow {
  color: #b8471a;
}

.page-contact .co-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-contact .co-partners__note {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(26, 21, 18, 0.76);
}

.page-contact .co-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(26, 21, 18, 0.18);
  background: rgba(26, 21, 18, 0.18);
  overflow: hidden;
}

.page-contact .co-metric {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--cream);
}

.page-contact .co-metric__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.25rem);
  font-weight: 700;
  line-height: 1;
  color: #b8471a;
}

.page-contact .co-metric__label {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: rgba(26, 21, 18, 0.7);
}

/* ---------- 联系方式 ---------- */
.page-contact .co-contact {
  padding: var(--co-pad) 0 0;
}

.page-contact .co-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--co-gap);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .co-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(24px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.02) inset, 0 22px 48px -40px rgba(0, 0, 0, 0.95);
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-contact .co-card:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-contact .co-card__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .co-card__value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.4rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
  word-break: break-word;
}

.page-contact .co-card--mail .co-card__value {
  color: var(--green);
}

.page-contact .co-card__note {
  margin: 4px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

.page-contact .co-card--addr {
  overflow: hidden;
}

.page-contact .co-card--addr::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(115deg, rgba(255, 106, 31, 0.07) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(25deg, rgba(87, 242, 164, 0.05) 0 1px, transparent 1px 20px);
}

.page-contact .co-card--addr > * {
  position: relative;
  z-index: 1;
}

/* ---------- 需求清单 ---------- */
.page-contact .co-brief {
  padding: var(--co-pad) 0;
}

.page-contact .co-brief__list {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: brief;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .co-brief__item {
  position: relative;
  padding: 16px 18px 16px 62px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--fg-muted);
  background: rgba(19, 28, 46, 0.55);
}

.page-contact .co-brief__item::before {
  counter-increment: brief;
  content: counter(brief, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--orange);
}

/* ---------- 延伸入口 ---------- */
.page-contact .co-links {
  padding: 0 0 var(--co-pad);
}

.page-contact .co-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--co-gap);
  margin-top: clamp(24px, 3.4vw, 38px);
}

.page-contact .co-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.24s ease, background-color 0.24s ease, transform 0.24s ease;
}

.page-contact .co-link:hover,
.page-contact .co-link:focus-visible {
  border-color: var(--orange);
  background: var(--ink-800);
  transform: translateY(-2px);
}

.page-contact .co-link__title {
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ice);
}

.page-contact .co-link__text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--fg-muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .co-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .co-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

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

@media (min-width: 900px) {
  .page-contact .co-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

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

  .page-contact .co-flow__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(18px, 2.4vw, 28px);
  }

  .page-contact .co-flow__track::before {
    left: 0;
    right: 0;
    top: 5px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--line) 0%, var(--line) 82%, transparent 100%);
  }

  .page-contact .co-step {
    padding-left: 0;
    padding-top: 30px;
  }

  .page-contact .co-step__dot {
    left: 0;
    top: 0;
  }

  .page-contact .co-partners__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

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

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

  .page-contact .co-brief__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .co-brief__item:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1120px) {
  .page-contact .co-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .co-hero__figure {
    transform: rotate(-1.6deg);
  }
}

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

  .page-contact .co-way,
  .page-contact .co-card,
  .page-contact .co-link {
    transition: none;
  }

  .page-contact .co-way:hover,
  .page-contact .co-card:hover,
  .page-contact .co-link:hover {
    transform: none;
  }
}