.page-contact {
  --contact-pad: clamp(20px, 5vw, 40px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: clamp(28px, 5vw, 56px);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-contact .contact-hero__body .eyebrow {
  margin: 0 0 14px;
}

.page-contact .contact-hero__body h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 6.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--text);
  max-width: 18ch;
}

.page-contact .contact-hero__lead {
  margin: 0 0 26px;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-contact .contact-hero__meta {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-hero__meta > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-contact .contact-hero__meta dt {
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .contact-hero__meta dd {
  margin: 0;
  font-size: 15px;
  color: var(--cyan-soft);
  text-align: right;
}

.page-contact .contact-hero__media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(37, 225, 212, 0.14), transparent 58%);
  pointer-events: none;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-grid {
  display: grid;
  gap: 18px;
}

.page-contact .coop-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-contact .coop-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 22px;
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .coop-card:hover,
.page-contact .coop-card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(37, 225, 212, 0.5);
  background: color-mix(in srgb, var(--panel) 88%, var(--cyan) 12%);
}

.page-contact .coop-card .tag {
  align-self: flex-start;
  margin-bottom: 14px;
}

.page-contact .coop-card h3 {
  margin: 0 0 12px;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .coop-card__desc {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .coop-card__sub {
  margin: 0 0 10px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
}

.page-contact .coop-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .coop-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .coop-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 四步流程 ---------- */
.page-contact .flow {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow__step {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 30px;
  height: 2px;
  background: var(--orange);
}

.page-contact .flow__num {
  display: block;
  font-size: 30px;
  line-height: 1;
  font-weight: 700;
  color: rgba(255, 155, 61, 0.9);
  margin-bottom: 12px;
}

.page-contact .flow__title {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
}

.page-contact .flow__time {
  margin: 0 0 12px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .flow__desc {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .flow__who {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels-intro {
  display: grid;
  gap: 22px;
  margin-bottom: 26px;
}

.page-contact .channels-intro__text {
  margin: 0;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .channels-intro__media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-contact .channels-intro__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-contact .channel-grid {
  display: grid;
  gap: 18px;
}

.page-contact .channel-card {
  position: relative;
  padding: 30px 24px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border: 1px solid rgba(43, 58, 87, 0.9);
  border-radius: 50%;
  pointer-events: none;
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 14px;
  height: 14px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  opacity: 0.7;
  pointer-events: none;
}

.page-contact .channel-card__coord {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .channel-card__label {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
}

.page-contact .channel-card__value {
  margin: 0 0 16px;
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.5;
  font-weight: 700;
  color: var(--text);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .channel-card__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .channel-footnote {
  margin: 20px 0 0;
  color: var(--muted);
}

/* ---------- 留言板 ---------- */
.page-contact .msg-board {
  display: grid;
  gap: 28px;
  padding: 28px 22px;
  border-radius: var(--radius);
  border: 1px solid rgba(43, 58, 87, 0.85);
}

.page-contact .msg-board__title {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}

.page-contact .msg-board__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .msg-board__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .msg-board__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
}

.page-contact .msg-board__format {
  display: grid;
  gap: 10px;
  padding: 18px 16px;
  background: rgba(7, 12, 24, 0.62);
  border: 1px dashed rgba(43, 58, 87, 0.95);
  border-radius: var(--radius-sm);
}

.page-contact .msg-board__format p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .msg-board__format span {
  display: inline-block;
  min-width: 8.5em;
  margin-right: 8px;
  color: var(--muted);
}

.page-contact .msg-board__hint {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq-list {
  display: grid;
  gap: 12px;
}

.page-contact .faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 160ms var(--ease);
}

.page-contact .faq-item[open] {
  border-color: rgba(37, 225, 212, 0.42);
}

.page-contact .faq-item summary {
  position: relative;
  padding: 18px 52px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text);
}

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

.page-contact .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-contact .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
  border-radius: var(--radius);
}

.page-contact .faq-item p {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 服务区域 ---------- */
.page-contact .region-grid {
  display: grid;
  gap: 16px;
}

.page-contact .region-item {
  padding: 24px 22px;
  background: linear-gradient(180deg, rgba(22, 34, 58, 0.92), rgba(14, 23, 41, 0.72));
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius-sm);
}

.page-contact .region-item__k {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-contact .region-item__t {
  margin: 0 0 12px;
  font-size: 17.5px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--text);
}

.page-contact .region-item__d {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .region-cta {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-contact .region-cta__text {
  margin: 0 0 18px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .region-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

  .page-contact .contact-hero__meta > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-right: 18px;
  }

  .page-contact .contact-hero__meta > div + div {
    padding-left: 18px;
    border-left: 1px solid var(--line);
  }

  .page-contact .contact-hero__meta dd {
    text-align: left;
  }

  .page-contact .msg-board {
    padding: 32px 30px;
  }

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

  .page-contact .region-item:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 820px) {
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .msg-board {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
  }

  .page-contact .channels-intro {
    grid-template-columns: 6fr 5fr;
    align-items: center;
    gap: 40px;
  }

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

  .page-contact .region-item:first-child {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow__step {
    padding: 28px 22px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-card,
  .page-contact .faq-item {
    transition: border-color 160ms var(--ease);
  }

  .page-contact .coop-card:hover,
  .page-contact .coop-card:focus-within {
    transform: none;
  }
}