.page-contact {
  --contact-grid-line: rgba(47, 227, 208, 0.13);
  --contact-soft-glow: rgba(90, 75, 224, 0.26);
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(60px, 9vw, 116px);
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--contact-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--contact-grid-line) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 16%, #000 58%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 16%, #000 58%, transparent);
  opacity: 0.55;
}

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

/* ---------- 首屏：邮箱信标 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 30px;
  padding-block: clamp(26px, 5vw, 58px) clamp(44px, 7vw, 88px);
}

.page-contact .hero-copy h1 {
  margin: 14px 0 0;
  font-size: clamp(34px, 7.4vw, 76px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--ghost);
}

.page-contact .hero-lead {
  margin: 18px 0 0;
  max-width: 38ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--haze);
}

.page-contact .mail-block {
  position: relative;
  margin-top: 26px;
  padding: 16px 18px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background:
    radial-gradient(120% 160% at 0% 0%, rgba(47, 227, 208, 0.16), transparent 62%),
    linear-gradient(150deg, rgba(11, 32, 54, 0.92), rgba(6, 20, 39, 0.96));
  box-shadow: 0 26px 56px -34px rgba(47, 227, 208, 0.7);
}

.page-contact .mail-block::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(47, 227, 208, 0));
}

.page-contact .mail-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-contact .mail-display {
  margin: 8px 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(16px, 4.1vw, 32px);
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: 0.005em;
  color: var(--cyan-soft);
  text-shadow: 0 0 16px rgba(47, 227, 208, 0.5), 0 0 40px rgba(47, 227, 208, 0.22);
  word-break: break-all;
  -webkit-user-select: all;
  user-select: all;
  cursor: text;
}

.page-contact .mail-hint {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--haze);
}

.page-contact .hero-note {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-contact .hero-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-contact .hero-note a:hover {
  color: var(--cyan-soft);
}

.page-contact .hero-media {
  position: relative;
}

.page-contact .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--trench), var(--deep));
}

.page-contact .hero-media::after {
  content: "";
  position: absolute;
  inset: -18% -12% 30% 26%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--contact-soft-glow), transparent 68%);
  filter: blur(18px);
  pointer-events: none;
}

/* ---------- 回信节奏 ---------- */
.page-contact .reply-band {
  padding: clamp(26px, 4vw, 40px) 0 clamp(34px, 5vw, 54px);
  border-top: 1px solid var(--line-soft);
}

.page-contact .band-head h2,
.page-contact .prep-head h2,
.page-contact .topics-head h2,
.page-contact .operator-plate h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ghost);
}

.page-contact .band-head p,
.page-contact .prep-head p {
  margin: 12px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--haze);
}

.page-contact .reply-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-contact .reply-card {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(165deg, rgba(11, 32, 54, 0.86), rgba(6, 20, 39, 0.72));
}

.page-contact .reply-card:first-child {
  border-color: var(--line-strong);
  background: linear-gradient(165deg, rgba(47, 227, 208, 0.13), rgba(6, 20, 39, 0.9) 62%);
}

.page-contact .reply-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--lime);
  text-shadow: 0 0 14px rgba(245, 225, 74, 0.32);
}

.page-contact .reply-card h3 {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ghost);
}

.page-contact .reply-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

/* ---------- 准备清单 ---------- */
.page-contact .prep {
  position: relative;
  padding: clamp(34px, 5vw, 62px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .prep-head {
  max-width: 46ch;
}

.page-contact .prep-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-contact .prep-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0 20px 2px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .prep-item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .prep-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(47, 227, 208, 0.4);
  padding-top: 2px;
}

.page-contact .prep-body h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ghost);
}

.page-contact .prep-body p {
  margin: 7px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 常见主题 ---------- */
.page-contact .topics {
  padding: clamp(34px, 5vw, 62px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .topic-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .topic-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px dashed var(--line);
}

.page-contact .topic-row:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-contact .topic-name {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ghost);
}

.page-contact .topic-tip {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze);
}

.page-contact .topic-link {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, 0.4);
  padding-bottom: 2px;
}

.page-contact .topic-link:hover {
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

.page-contact .topics-foot {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 运营主体 ---------- */
.page-contact .operator {
  position: relative;
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(28px, 5vw, 56px) clamp(16px, 3vw, 34px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(155deg, rgba(2, 10, 18, 0.94), rgba(11, 32, 54, 0.9));
}

.page-contact .operator-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  -webkit-mask-image: linear-gradient(120deg, transparent, #000 55%, #000);
  mask-image: linear-gradient(120deg, transparent, #000 55%, #000);
  pointer-events: none;
}

.page-contact .operator-plate {
  position: relative;
  z-index: 1;
  max-width: 560px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(11, 32, 54, 0.72), rgba(6, 20, 39, 0.86));
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(6px);
}

.page-contact .operator-lead {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--haze);
}

.page-contact .operator-list {
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
}

.page-contact .operator-row {
  display: grid;
  gap: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .operator-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .operator-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ghost);
  word-break: break-word;
}

.page-contact .operator-icp,
.page-contact .operator-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  color: var(--cyan-soft);
  text-shadow: 0 0 12px rgba(47, 227, 208, 0.26);
}

.page-contact .operator-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--haze);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-contact .mail-block {
    padding: 14px 14px 16px;
  }

  .page-contact .prep-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-contact .operator {
    padding-inline: 14px;
  }
}

/* ---------- 桌面版式 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 48px;
  }

  .page-contact .hero-media {
    transform: translateY(16px);
  }

  .page-contact .reply-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .prep {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .prep-list {
    margin-top: 4px;
  }

  .page-contact .topic-row {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.5fr) 150px;
    align-items: baseline;
    gap: 22px;
  }

  .page-contact .topic-link {
    justify-self: end;
  }

  .page-contact .operator-plate {
    margin-left: auto;
  }
}