/* ===== 联系我们 · 通讯板 ===== */
.page-contact {
  --contact-glow: rgba(53, 240, 208, 0.08);
  padding-bottom: 96px;
}

/* ---------- 顶部上下文 ---------- */
.page-contact .contact-masthead {
  padding-top: clamp(24px, 5vw, 56px);
}

.page-contact .contact-masthead h1 {
  font-size: clamp(1.85rem, 6.2vw, 3.35rem);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--white);
  margin: 16px 0 18px;
  max-width: 760px;
}

.page-contact .contact-masthead .lead {
  max-width: 660px;
}

.page-contact .contact-nightscape {
  position: relative;
  margin: 36px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(120deg, #06110F 0%, #0B1F1B 48%, #12332C 100%);
}

.page-contact .contact-nightscape::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 240, 208, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 240, 208, 0.06) 1px, transparent 1px);
  background-size: 52px 52px;
}

.page-contact .contact-nightscape img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 8 / 3;
}

.page-contact .contact-nightscape__cap {
  position: relative;
  z-index: 1;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* ---------- 章节标题 ---------- */
.page-contact .contact-board h2,
.page-contact .contact-prep h2,
.page-contact .contact-partners h2,
.page-contact .contact-faq h2,
.page-contact .contact-reply h2 {
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 14px 0 0;
  max-width: 800px;
}

/* ---------- 01 联系板 ---------- */
.page-contact .contact-board__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 28px;
}

.page-contact .contact-card {
  position: relative;
  overflow: hidden;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, var(--panel) 0%, var(--panel-2) 100%);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 240, 208, 0.22), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-line {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--line);
}

.page-contact .contact-line:first-of-type {
  padding-top: 12px;
}

.page-contact .contact-line:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .contact-line__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-contact .contact-line__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-contact .contact-line__value {
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 3.6vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--white);
  word-break: break-all;
  overflow-wrap: anywhere;
}

.page-contact .contact-line__address {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 3.2vw, 1.12rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-contact .contact-line__hint {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--muted);
  max-width: 46ch;
}

.page-contact .contact-line .copy-btn {
  border-color: var(--cyan);
  color: var(--cyan);
  flex: 0 0 auto;
}

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

.page-contact .contact-route {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-contact .contact-route:hover {
  border-color: var(--cyan);
  background: var(--panel-2);
}

.page-contact .contact-route__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-contact .contact-route__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.42;
  color: var(--white);
}

.page-contact .contact-route p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 02 咨询准备 ---------- */
.page-contact .contact-prep__intro {
  margin: 18px 0 0;
  max-width: var(--textw);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 30px;
}

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

.page-contact .prep-list__item {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .prep-list__item:first-child {
  padding-top: 0;
}

.page-contact .prep-list__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .prep-list__tick {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
}

.page-contact .prep-list__tick::after {
  content: "✓";
  font-size: 11px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .prep-list__item strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--white);
}

.page-contact .prep-list__item span {
  display: block;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-mail-shot {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--panel-2);
}

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

.page-contact .contact-mail-shot__cap {
  padding: 12px 18px 15px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .contact-prep__note {
  margin: 30px 0 0;
  max-width: var(--textw);
  padding: 16px 0 16px 18px;
  border-left: 2px solid var(--orange);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 03 合作咨询 ---------- */
.page-contact .contact-partners__lead {
  margin: 18px 0 0;
  max-width: var(--textw);
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .coop-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .coop-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 18px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-left-color 0.2s ease, background 0.2s ease;
}

.page-contact .coop-list__item:hover {
  border-left-color: var(--orange);
  background: var(--contact-glow);
}

.page-contact .coop-list__item h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-contact .coop-list__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-partners__note {
  margin: 24px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 04 常见问题引导 ---------- */
.page-contact .contact-faq__band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel);
}

.page-contact .contact-faq__band h2 {
  margin-top: 12px;
}

.page-contact .contact-faq__band p {
  margin: 14px 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--muted);
  max-width: 62ch;
}

.page-contact .contact-faq__band .btn {
  justify-self: start;
}

/* ---------- 05 回复时间 ---------- */
.page-contact .reply-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 26px;
  padding: 28px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(125deg, rgba(53, 240, 208, 0.12) 0%, rgba(255, 138, 61, 0.09) 62%, transparent 100%),
    var(--panel);
}

.page-contact .reply-band__num {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 12vw, 5.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-contact .reply-band__body h2 {
  margin-top: 0;
}

.page-contact .reply-band__body p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 链接样式 ---------- */
.page-contact .contact-personal-links,
.page-contact main a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-contact .contact-prep__note a,
.page-contact .contact-partners__lead a,
.page-contact .contact-partners__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-prep__note a:hover,
.page-contact .contact-partners__lead a:hover,
.page-contact .contact-partners__note a:hover {
  color: var(--cyan-soft);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-board__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 28px;
    align-items: start;
  }

  .page-contact .contact-card {
    padding: 34px 32px;
  }

  .page-contact .prep-grid {
    grid-template-columns: 1fr 0.72fr;
    gap: 44px;
    align-items: start;
  }

  .page-contact .contact-mail-shot {
    position: sticky;
    top: calc(var(--rail) + 24px);
  }
}

@media (min-width: 780px) {
  .page-contact .coop-list__item {
    grid-template-columns: 232px 1fr;
    gap: 28px;
    align-items: baseline;
    padding: 24px 20px;
  }

  .page-contact .contact-faq__band {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 44px;
    padding: 34px 38px;
  }

  .page-contact .reply-band {
    grid-template-columns: 176px 1fr;
    gap: 40px;
    align-items: center;
    padding: 40px;
  }
}

@media (max-width: 480px) {
  .page-contact .contact-line__row {
    gap: 10px;
  }

  .page-contact .contact-line__value {
    font-size: 0.98rem;
  }

  .page-contact .contact-route {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .page-contact .contact-route__idx {
    padding-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-route,
  .page-contact .coop-list__item {
    transition: none;
  }
}