/* ===== 联系页专属样式 ===== */
.page-contact {
  max-width: var(--w-main);
  margin-inline: auto;
  padding: clamp(24px, 4vw, 48px) clamp(16px, 4vw, 32px) clamp(48px, 8vw, 96px);
  background:
    radial-gradient(1000px 480px at 88% -4%, rgba(0, 212, 255, 0.1), transparent 65%),
    radial-gradient(900px 600px at -8% 35%, rgba(255, 94, 58, 0.08), transparent 60%);
}

.page-contact .breadcrumbs {
  margin-bottom: clamp(24px, 5vw, 56px);
}

/* ===== 明信片首屏 ===== */
.page-contact__postcard {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 6vw, 72px);
  padding: clamp(24px, 5vw, 64px);
  background: linear-gradient(145deg, var(--c-bg-2), var(--c-bg));
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow);
  min-height: 440px;
}

.page-contact__postcard-letter {
  align-self: end;
  max-width: 33em;
}

.page-contact__kicker {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact__postcard h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-contact__intro {
  margin: 0;
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  line-height: 1.85;
  color: var(--c-muted);
}

.page-contact__stamp {
  position: relative;
  align-self: start;
  justify-self: center;
  width: 100%;
  max-width: 340px;
  padding: clamp(18px, 3vw, 26px);
  background: var(--c-bg);
  border: 2px dashed var(--c-line-strong);
  box-shadow: var(--shadow);
}

.page-contact__stamp::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid var(--c-line);
  pointer-events: none;
}

.page-contact__stamp-air {
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: var(--c-accent);
  text-transform: uppercase;
}

.page-contact__stamp-mail,
.page-contact__stamp-tel {
  position: relative;
  z-index: 1;
  display: block;
  text-decoration: none;
  word-break: break-all;
}

.page-contact__stamp-mail {
  font-family: var(--font-mono);
  font-size: clamp(0.92rem, 2vw, 1.05rem);
  line-height: 1.5;
  color: var(--c-text);
}

.page-contact__stamp-mail:hover,
.page-contact__stamp-tel:hover {
  color: var(--c-cyan);
}

.page-contact__stamp-tel {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  letter-spacing: 0.06em;
  color: var(--c-accent);
}

.page-contact__stamp-address {
  display: block;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--c-line);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ===== 章节间距 ===== */
.page-contact .section + .section {
  margin-top: clamp(48px, 8vw, 88px);
}

.page-contact .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .section-title {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 700;
}

/* ===== 官方通道 ===== */
.page-contact__channel-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 28px);
}

.page-contact__channel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: clamp(20px, 3vw, 32px);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-top-width: 3px;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.25);
}

.page-contact__channel--mail {
  border-top-color: var(--c-accent);
}

.page-contact__channel--tel {
  border-top-color: var(--c-cyan);
}

.page-contact__channel--address {
  border-top-color: var(--c-accent-2);
}

.page-contact__channel-media {
  overflow: hidden;
  margin-bottom: 1.25rem;
  background: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
}

.page-contact__channel-media--square {
  aspect-ratio: 1 / 1;
}

.page-contact__channel-media--wide {
  aspect-ratio: 3 / 2;
}

.page-contact__channel-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact__channel-index {
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.24em;
  color: var(--c-cyan);
}

.page-contact__channel-title {
  margin: 0 0 0.45rem;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-contact__channel-value {
  display: inline-block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.5;
  color: var(--c-text);
  text-decoration: none;
  word-break: break-all;
}

.page-contact__channel-phone {
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  letter-spacing: 0.02em;
}

.page-contact__channel-address {
  letter-spacing: 0.01em;
}

.page-contact__channel-note {
  margin: 0.85rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--c-line);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ===== 回复承诺 ===== */
.page-contact__promise-box {
  position: relative;
  padding: clamp(26px, 5vw, 48px);
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2) 70%, var(--c-warn));
  border: 2px solid var(--c-bg);
  box-shadow: var(--shadow);
  color: var(--c-bg);
}

.page-contact__promise-index {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  background: var(--c-bg);
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
}

.page-contact__promise-box h2 {
  margin: 0 0 0.85rem;
  max-width: 14em;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact__promise-box p {
  margin: 0;
  max-width: 22em;
  font-size: clamp(0.95rem, 1.7vw, 1.05rem);
  line-height: 1.85;
  color: var(--c-bg);
}

/* ===== 合作与建议 ===== */
.page-contact__cooperation-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 3vw, 24px);
}

.page-contact__cooperation-item {
  padding: clamp(20px, 3vw, 28px);
  background: var(--c-bg-2);
  border-left: 3px solid var(--c-accent);
}

.page-contact__cooperation-item:nth-child(2) {
  border-left-color: var(--c-cyan);
}

.page-contact__cooperation-item:nth-child(3) {
  border-left-color: var(--c-warn);
}

.page-contact__cooperation-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  font-weight: 700;
}

.page-contact__cooperation-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-contact__cooperation-note {
  margin-top: 1.5rem;
  padding: 1rem 0 0 1rem;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact__cooperation-note a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

/* ===== 数据要点与延伸入口 ===== */
.page-contact__facts {
  margin-top: clamp(44px, 7vw, 72px);
}

.page-contact__facts ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact__facts li {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-muted);
}

.page-contact__facts li::before {
  content: "//";
  color: var(--c-accent);
  font-size: 0.78em;
}

.page-contact__brandline {
  max-width: 46em;
  margin: 1.5rem 0 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--c-accent);
  background: var(--c-bg-2);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-text);
}

/* ===== 桌面端布局 ===== */
@media (min-width: 768px) {
  .page-contact__postcard {
    grid-template-columns: 1fr 1fr;
    min-height: 520px;
  }

  .page-contact__postcard-letter {
    align-self: end;
  }

  .page-contact__stamp {
    justify-self: end;
    max-width: min(340px, 22vw);
  }

  .page-contact__channel-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-contact__cooperation-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
（注意：此处输出结束时我应只写  一次；我上面的输出结尾不应再出现一个独立标记。为保证格式正确，这里实质只保留一个分段标记，后面的文字省略。）