.page-contact {
  --contact-hair: rgba(34, 199, 255, 0.24);
  --contact-edge: rgba(30, 58, 107, 0.9);
  --contact-veil: rgba(20, 41, 92, 0.42);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(2.2rem, 6vw, 4.2rem)) 0 clamp(2.4rem, 5vw, 3.8rem);
  background:
    radial-gradient(120% 95% at 92% -12%, rgba(34, 199, 255, 0.15), transparent 62%),
    linear-gradient(152deg, var(--c-night) 0%, var(--c-black) 100%);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(30, 58, 107, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 107, 0.34) 1px, transparent 1px);
  background-size: 78px 78px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 78%);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: 56%;
  height: 152%;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(148deg, rgba(58, 141, 255, 0.22), rgba(34, 199, 255, 0.05) 56%, transparent);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
}

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

.page-contact .hero-eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(1.85rem, 5vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-contact .hero-lead {
  margin: 1.15rem 0 0;
  max-width: 62ch;
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--c-silver);
}

/* ---------- 首屏信息条 ---------- */

.page-contact .hero-strip {
  margin-top: clamp(1.8rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--contact-hair);
  border-radius: var(--r-md);
  background: var(--contact-hair);
  overflow: hidden;
  box-shadow: var(--shadow-panel);
}

.page-contact .strip-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.5rem 1.5rem 1.6rem;
  background: linear-gradient(180deg, rgba(11, 27, 58, 0.96), rgba(6, 7, 12, 0.94));
}

.page-contact .strip-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-neon);
  opacity: 0.6;
}

.page-contact .strip-primary::before {
  opacity: 1;
}

.page-contact .strip-key {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-contact .strip-val {
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 2.4vw, 1.1rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-paper);
  word-break: break-word;
}

.page-contact .strip-addr {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: 0;
}

.page-contact .strip-note {
  font-size: 0.88rem;
  line-height: 1.66;
  color: var(--c-muted);
}

/* ---------- 准备清单 ---------- */

.page-contact .prep-grid,
.page-contact .flow-grid,
.page-contact .local-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3vw, 2.2rem);
  margin-top: clamp(1.6rem, 3vw, 2.4rem);
}

.page-contact .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.page-contact .prep-item {
  position: relative;
  padding: 1.15rem 1.3rem 1.2rem 3.3rem;
  background: var(--contact-veil);
  border: 1px solid var(--contact-edge);
  border-radius: var(--r-md);
}

.page-contact .prep-item::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 1.5rem;
  width: 15px;
  height: 15px;
  border: 2px solid var(--c-cyan);
  border-radius: 3px;
}

.page-contact .prep-item::after {
  content: "";
  position: absolute;
  left: 1.56rem;
  top: 1.66rem;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--c-mint);
  border-bottom: 2px solid var(--c-mint);
  transform: rotate(42deg);
}

.page-contact .prep-name {
  margin: 0 0 0.32rem;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-contact .prep-text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--c-silver);
}

.page-contact .prep-aside {
  align-self: start;
  padding: 1.6rem 1.5rem 1.7rem;
}

.page-contact .aside-mark {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .aside-title {
  margin: 0 0 0.6rem;
  font-size: 1.16rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--c-paper);
}

.page-contact .aside-text {
  margin: 0 0 1.2rem;
  font-size: 0.93rem;
  line-height: 1.74;
  color: var(--c-silver);
}

/* ---------- 处理环节 ---------- */

.page-contact .flow-track {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.page-contact .flow-step {
  border: 1px solid var(--contact-edge);
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--r-md);
  background: var(--contact-veil);
  overflow: hidden;
}

.page-contact .flow-sum {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.15rem;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

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

.page-contact .flow-sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--c-cyan);
  transition: transform 0.28s var(--ease);
}

.page-contact .flow-step[open] .flow-sum::after {
  transform: rotate(45deg);
}

.page-contact .step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-contact .flow-body {
  padding: 0 1.15rem 1.15rem 3.05rem;
}

.page-contact .flow-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.74;
  color: var(--c-silver);
}

.page-contact .flow-media,
.page-contact .local-media {
  margin: 0;
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  overflow: hidden;
}

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

/* ---------- 本地支持 ---------- */

.page-contact .local-body {
  align-self: center;
}

.page-contact .local-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}

.page-contact .local-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.94rem;
  line-height: 1.74;
  color: var(--c-silver);
}

.page-contact .local-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(34, 199, 255, 0.14);
}

.page-contact .local-list strong {
  color: var(--c-paper);
  font-weight: 700;
}

/* ---------- 内容协作 ---------- */

.page-contact .collab-grid {
  margin-top: clamp(1.6rem, 3vw, 2.4rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-contact .collab-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.4rem 1.6rem;
  border: 1px solid var(--contact-edge);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, rgba(20, 41, 92, 0.6), rgba(6, 7, 12, 0.58));
}

.page-contact .collab-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -55% auto;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(34, 199, 255, 0.16), transparent 70%);
}

.page-contact .collab-tag {
  display: inline-block;
  margin-bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .collab-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-contact .collab-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.74;
  color: var(--c-silver);
}

/* ---------- 收尾 ---------- */

.page-contact .final-panel {
  padding: clamp(1.6rem, 4vw, 2.6rem);
  border-radius: var(--r-lg);
  border: 1px solid var(--contact-hair);
  background:
    radial-gradient(95% 130% at 100% 0%, rgba(34, 199, 255, 0.16), transparent 62%),
    linear-gradient(150deg, var(--c-mid), var(--c-black));
}

.page-contact .final-title {
  margin: 0 0 0.7rem;
  font-size: clamp(1.3rem, 2.6vw, 1.75rem);
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-contact .final-text {
  margin: 0 0 1rem;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--c-silver);
}

.page-contact .final-note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact .mono {
  font-family: var(--font-mono);
  color: var(--c-cyan);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-contact .collab-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-contact .hero-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }

  .page-contact .flow-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-contact .local-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .flow-sum::after {
    transition: none;
  }
}