.page-contact {
  --pc-surface: rgba(16, 26, 43, 0.66);
  --pc-surface-2: rgba(11, 14, 19, 0.88);
  --pc-glass: linear-gradient(158deg, rgba(16, 26, 43, 0.92) 0%, rgba(5, 7, 10, 0.94) 78%);
  --pc-tone: var(--cyan);
  width: 100%;
  padding: clamp(20px, 4vw, 44px) clamp(16px, 4vw, 40px) clamp(56px, 8vw, 96px);
}

.page-contact *,
.page-contact *::before,
.page-contact *::after {
  box-sizing: border-box;
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius-s);
  box-shadow: 0 0 0 5px rgba(16, 26, 43, 0.92);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  max-width: 46rem;
  margin: clamp(18px, 3vw, 30px) 0 clamp(36px, 6vw, 64px);
}

.page-contact .contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.6vw, 3.55rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--white);
  margin: 14px 0 18px;
}

.page-contact .contact-hero__lede {
  margin: 0;
  color: var(--silver);
  font-size: clamp(0.98rem, 2.4vw, 1.06rem);
  line-height: 1.8;
}

.page-contact .contact-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-contact .contact-jump__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: rgba(11, 14, 19, 0.6);
  color: var(--silver);
  font-size: 0.86rem;
  text-decoration: none;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease),
    background-color var(--dur-1) var(--ease);
}

.page-contact .contact-jump__link:hover {
  color: var(--white);
  border-color: var(--line-strong);
  background: rgba(16, 26, 43, 0.9);
}

.page-contact .contact-jump__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */
.page-contact .contact-section {
  margin-top: clamp(48px, 8vw, 88px);
  transition: opacity var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-contact .contact-section__head {
  margin-bottom: clamp(20px, 3.2vw, 34px);
  max-width: 48rem;
}

.page-contact .contact-section__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.8vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--white);
  margin: 0;
}

.page-contact .contact-section__desc {
  margin: 12px 0 0;
  color: var(--silver);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* ---------- 合作类型 ---------- */
.page-contact .contact-types {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-contact .type-card {
  position: relative;
  padding: 22px 22px 26px;
  border-radius: var(--radius-l);
  background: var(--pc-glass);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease),
    box-shadow var(--dur-1) var(--ease);
}

.page-contact .type-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--pc-tone) 0%, transparent 70%);
  opacity: 0.16;
  pointer-events: none;
}

.page-contact .type-card::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 12px;
  height: 2px;
  border-radius: var(--pill);
  background: var(--pc-tone);
  opacity: 0.75;
}

.page-contact .type-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 40px -28px var(--pc-tone);
}

.page-contact .type-card__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--pc-tone);
}

.page-contact .type-card__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .type-card__desc {
  margin: 0;
  color: var(--silver);
  font-size: 0.92rem;
  line-height: 1.72;
}

.page-contact .type-card--cyan { --pc-tone: var(--cyan); }
.page-contact .type-card--gold { --pc-tone: var(--gold); }
.page-contact .type-card--azure { --pc-tone: var(--azure); }
.page-contact .type-card--lime { --pc-tone: var(--lime); }

/* ---------- 联系渠道 ---------- */
.page-contact .contact-channels {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-contact .channel-stack {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .channel-card {
  padding: 20px 22px;
  border-radius: var(--radius-l);
  background: var(--pc-surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--pc-tone);
  display: grid;
  gap: 8px;
}

.page-contact .channel-card--cyan { --pc-tone: var(--cyan); }
.page-contact .channel-card--gold { --pc-tone: var(--gold); }
.page-contact .channel-card--azure { --pc-tone: var(--azure); }

.page-contact .channel-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--pc-tone);
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 2.6vw, 1.14rem);
  color: var(--white);
  word-break: break-word;
  overflow-wrap: anywhere;
  line-height: 1.5;
}

.page-contact .channel-card__value a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-contact .channel-card__value a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .contact-channel-address {
  font-size: clamp(0.92rem, 2.4vw, 1.02rem);
}

.page-contact .channel-card__note {
  margin: 0;
  color: var(--silver);
  font-size: 0.88rem;
  line-height: 1.68;
}

.page-contact .contact-hours {
  margin-top: 4px;
  padding: 20px 22px;
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, rgba(34, 211, 238, 0.12) 0%, rgba(11, 14, 19, 0.92) 62%);
  border: 1px solid var(--line-strong);
}

.page-contact .contact-hours__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--white);
}

.page-contact .contact-hours__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 0.88rem;
  color: var(--silver);
}

.page-contact .contact-hours__row:last-of-type {
  border-bottom: 0;
}

.page-contact .contact-hours__val {
  font-family: var(--font-mono);
  color: var(--white);
}

.page-contact .contact-hours__note {
  margin: 14px 0 0;
  color: var(--silver);
  font-size: 0.86rem;
  line-height: 1.7;
}

.page-contact .contact-media {
  margin: 0;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: var(--pc-surface-2);
  overflow: hidden;
}

.page-contact .contact-media img,
.page-contact .contact-visit__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .media__caption {
  padding: 12px 18px 16px;
  color: var(--silver);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* ---------- 合作流程 ---------- */
.page-contact .contact-flow {
  display: grid;
  gap: 18px;
}

.page-contact .contact-flow__svg {
  display: none;
  width: 100%;
  height: 56px;
}

.page-contact .contact-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-contact .flow-step {
  position: relative;
  padding: 20px 20px 22px;
  border-radius: var(--radius-l);
  background: var(--pc-surface-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--pc-tone);
  transition: transform var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-contact .flow-step:hover {
  transform: translateY(-2px);
}

.page-contact .flow-step--cyan { --pc-tone: var(--cyan); }
.page-contact .flow-step--azure { --pc-tone: var(--azure); }
.page-contact .flow-step--gold { --pc-tone: var(--gold); }
.page-contact .flow-step--lime { --pc-tone: var(--lime); }

.page-contact .flow-step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--pc-tone);
}

.page-contact .flow-step__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  color: var(--white);
}

.page-contact .flow-step__desc {
  margin: 0;
  color: var(--silver);
  font-size: 0.9rem;
  line-height: 1.72;
}

/* ---------- 来访沟通 ---------- */
.page-contact .contact-visit {
  display: grid;
  gap: 22px;
  grid-template-columns: 1fr;
}

.page-contact .contact-visit__address-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--azure);
}

.page-contact .contact-address {
  margin: 0;
  padding: 15px 18px;
  border-radius: var(--radius-m);
  background: rgba(16, 26, 43, 0.72);
  border: 1px dashed var(--line-strong);
  font-family: var(--font-mono);
  font-size: clamp(0.94rem, 2.5vw, 1.02rem);
  color: var(--white);
  line-height: 1.55;
}

.page-contact .contact-visit__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .contact-visit__list li {
  position: relative;
  padding-left: 22px;
  color: var(--silver);
  font-size: 0.92rem;
  line-height: 1.72;
}

.page-contact .contact-visit__list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.7);
}

.page-contact .contact-visit__hint {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  color: var(--silver);
  font-size: 0.88rem;
  line-height: 1.72;
}

.page-contact .contact-visit__media {
  margin: 0;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: var(--pc-surface-2);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 常见问题 ---------- */
.page-contact .contact-faq {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  align-items: start;
}

.page-contact .fold {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--pc-surface-2);
  overflow: hidden;
  transition: border-color var(--dur-1) var(--ease);
}

.page-contact .fold:hover {
  border-color: var(--line-strong);
}

.page-contact .fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 52px;
  padding: 14px 18px;
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
}

.page-contact .fold__summary::-webkit-details-marker {
  display: none;
}

.page-contact .fold__summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--cyan);
  transition: transform var(--dur-1) var(--ease);
}

.page-contact .fold[open] .fold__summary::after {
  content: "–";
}

.page-contact .fold__body {
  padding: 0 18px 18px;
  color: var(--silver);
  font-size: 0.9rem;
  line-height: 1.78;
}

.page-contact .fold__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.5);
}

.page-contact .fold__body a:hover {
  border-color: var(--cyan);
}

/* ---------- 相关入口 ---------- */
.page-contact .contact-links {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-contact .contact-link-card {
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: var(--pc-surface);
  text-decoration: none;
  transition: transform var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease),
    box-shadow var(--dur-1) var(--ease);
}

.page-contact .contact-link-card:hover {
  transform: translateY(-2px);
  border-color: var(--pc-tone);
  box-shadow: 0 20px 44px -32px var(--pc-tone);
}

.page-contact .contact-link-card--cyan { --pc-tone: var(--cyan); }
.page-contact .contact-link-card--azure { --pc-tone: var(--azure); }
.page-contact .contact-link-card--gold { --pc-tone: var(--gold); }
.page-contact .contact-link-card--lime { --pc-tone: var(--lime); }

.page-contact .contact-link-card__title {
  font-family: var(--font-display);
  font-size: 1.04rem;
  color: var(--white);
}

.page-contact .contact-link-card__desc {
  color: var(--silver);
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-contact .contact-link-card__more {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--pc-tone);
}

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

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

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

@media (min-width: 900px) {
  .page-contact .contact-channels {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 26px;
  }

  .page-contact .contact-flow__svg {
    display: block;
  }

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

  .page-contact .contact-visit {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: center;
    gap: 30px;
  }

  .page-contact .contact-faq {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 16px;
  }
}

@media (min-width: 1120px) {
  .page-contact .contact-types {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .type-card,
  .page-contact .flow-step,
  .page-contact .contact-link-card,
  .page-contact .contact-jump__link,
  .page-contact .fold,
  .page-contact .contact-section {
    transition: none;
  }

  .page-contact .type-card:hover,
  .page-contact .flow-step:hover,
  .page-contact .contact-link-card:hover {
    transform: none;
  }
}