/* ============ 联系页面专属样式（page-contact） ============ */
.page-contact {
  --contact-grid-blue: rgba(0, 166, 255, 0.05);
  --contact-grid-line: rgba(0, 166, 255, 0.04);
  --contact-green: var(--neon-green);
  --contact-blue: var(--electric-blue);
  --contact-line: var(--border-c);
  background: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.7;
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

/* ---- 首屏：蓝色网格 + 底部渐变分割 ---- */
.page-contact__hero {
  position: relative;
  background:
    linear-gradient(var(--contact-grid-blue) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-blue) 1px, transparent 1px),
    var(--bg-deep);
  background-size: 44px 44px, 44px 44px, auto;
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  overflow: hidden;
}

.page-contact__hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--contact-green) 0 62%, var(--contact-blue) 62% 100%);
}

.page-contact__hero-grid {
  display: grid;
  gap: 2rem;
  align-items: end;
}

.page-contact__hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0.9rem 0 1rem;
  position: relative;
}

.page-contact__hero h1::after {
  content: "";
  display: block;
  width: 76px;
  height: 6px;
  background: var(--contact-green);
  margin-top: 1rem;
}

.page-contact__hero .lead {
  color: var(--text-sub);
  font-size: 1.05rem;
  max-width: 38em;
  margin: 0;
}

.page-contact__hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.page-contact__metric {
  border: 1px solid var(--contact-line);
  background: rgba(17, 26, 36, 0.72);
  padding: 0.9rem 0.7rem;
  text-align: left;
}

.page-contact__metric-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1.1;
  color: var(--contact-green);
  display: block;
}

.page-contact__metric-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-sub);
  letter-spacing: 0.06em;
  margin-top: 0.35rem;
}

.page-contact__quick-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--contact-line);
}

.page-contact__quick-nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-sub);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.22s ease;
}

.page-contact__quick-nav a:hover {
  color: var(--contact-green);
}

/* ---- 01 联系渠道 ---- */
.page-contact__channels {
  position: relative;
  background-image:
    linear-gradient(var(--contact-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-contact__channels-head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}

.page-contact__channels-head .section-eyebrow {
  margin-top: 0.4rem;
}

.page-contact__channels-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0.3rem 0 0.4rem;
}

.page-contact__channels-head .section-subtitle {
  color: var(--text-sub);
  margin-bottom: 0;
}

.page-contact__section-code {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 3.6rem;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px var(--contact-blue);
  opacity: 0.28;
  display: block;
  flex: 0 0 auto;
}

.page-contact__channels-layout {
  display: grid;
  gap: 2.25rem;
  align-items: center;
}

.page-contact__channel-card {
  border: 1px solid var(--contact-line);
  border-left: 4px solid var(--contact-green);
  background: var(--bg-raised);
  padding: 0.75rem 1.5rem 1.5rem;
}

.page-contact__channel-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--contact-line);
}

.page-contact__channel-row:last-of-type {
  border-bottom: 0;
}

.page-contact__channel-index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--contact-blue);
  background: rgba(0, 166, 255, 0.08);
  border: 1px solid rgba(0, 166, 255, 0.22);
  border-radius: 2px;
  padding: 0.35rem 0.5rem;
  align-self: start;
  text-align: center;
  white-space: nowrap;
}

.page-contact__channel-body h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  line-height: 1.2;
}

.page-contact__channel-value {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.6vw, 1.12rem);
  color: var(--text-main);
  text-decoration: none;
  border-bottom: 1px dashed var(--contact-blue);
  transition: color 0.2s;
  word-break: break-all;
}

a.page-contact__channel-value:hover {
  color: var(--contact-blue);
}

.page-contact__channel-note {
  color: var(--text-sub);
  font-size: 0.88rem;
  margin: 0.45rem 0 0;
}

.page-contact__channels-commitment {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  background: rgba(0, 230, 140, 0.06);
  border: 1px solid rgba(0, 230, 140, 0.22);
  padding: 0.85rem 1rem;
  margin-top: 0.75rem;
  color: var(--text-main);
  font-size: 0.9rem;
}

.page-contact__commitment-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  background: var(--contact-green);
  margin-top: 0.4rem;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(0, 230, 140, 0.6);
}

.page-contact__channel-viz {
  border: 1px solid var(--contact-line);
  background: var(--bg-raised);
  padding: 0.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.page-contact__channel-viz .img-frame__caption {
  text-align: center;
  color: var(--text-sub);
  font-size: 0.82rem;
  padding-top: 0.6rem;
}

/* ---- 02 服务咨询 ---- */
.page-contact__services {
  background:
    linear-gradient(var(--contact-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-line) 1px, transparent 1px),
    var(--bg-raised);
  background-size: 48px 48px, 48px 48px, auto;
}

.page-contact__services-top {
  display: grid;
  gap: 2rem;
  align-items: center;
  margin-bottom: 2.75rem;
}

.page-contact__mail-viz {
  max-width: 400px;
  border: 1px solid var(--contact-line);
  background: var(--bg-deep);
  padding: 0.5rem;
}

.page-contact__mail-viz .img-frame__caption {
  text-align: center;
  color: var(--text-sub);
  font-size: 0.82rem;
  padding-top: 0.6rem;
}

.page-contact__services-intro h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  margin: 0.35rem 0 0.6rem;
}

.page-contact__services-intro .section-subtitle {
  color: var(--text-sub);
  margin-bottom: 1rem;
  max-width: 40em;
}

.page-contact__services-mail {
  font-family: var(--font-mono);
  font-size: 1.12rem;
  font-weight: 600;
  color: var(--contact-green);
  text-decoration: none;
  border-bottom: 2px solid var(--contact-green);
  padding-bottom: 0.15rem;
  word-break: break-all;
}

.page-contact__services-grid {
  display: grid;
  gap: 1.5rem;
}

.page-contact__service-board {
  border: 1px solid var(--contact-line);
  border-top: 4px solid var(--contact-blue);
  background: var(--bg-deep);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-contact__service-board:hover {
  box-shadow: 0 -8px 0 rgba(0, 166, 255, 0.16), 0 14px 32px rgba(0, 0, 0, 0.22);
  transform: translateY(-3px);
}

.page-contact__service-board .board__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.page-contact__service-board .board__body {
  flex: 1 1 auto;
}

.page-contact__service-board .board__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin: 0 0 0.55rem;
}

.page-contact__service-board .board__body p {
  color: var(--text-sub);
  font-size: 0.92rem;
  margin: 0;
}

.page-contact__service-board .board__body ul {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-sub);
  font-size: 0.92rem;
}

.page-contact__service-board .board__footer {
  margin-top: auto;
}

.page-contact__service-board .board__footer a {
  color: var(--contact-blue);
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed var(--contact-blue);
  padding-bottom: 0.1rem;
}

.page-contact__service-num {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(0, 166, 255, 0.32);
}

.page-contact__faq-hint {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--contact-blue);
  background: rgba(0, 166, 255, 0.05);
  color: var(--text-sub);
  font-size: 0.92rem;
}

.page-contact__faq-hint a {
  color: var(--contact-green);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---- 03 商务合作 ---- */
.page-contact__partnership {
  position: relative;
  overflow: hidden;
}

.page-contact__partnership::before {
  content: "PARTNERSHIP";
  position: absolute;
  top: 1rem;
  right: -1rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(5rem, 12vw, 8rem);
  line-height: 1;
  color: rgba(255, 184, 0, 0.04);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
}

.page-contact__partnership-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.page-contact__partnership-copy h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  margin: 0.35rem 0 0.6rem;
}

.page-contact__partnership-copy .section-subtitle {
  color: var(--text-sub);
  margin-bottom: 1.5rem;
  max-width: 38em;
}

.page-contact__partnership-btn {
  display: inline-block;
}

.page-contact__about-link {
  margin-top: 1.25rem;
}

.page-contact__about-link a {
  color: var(--text-sub);
  border-bottom: 1px solid var(--contact-line);
  padding-bottom: 2px;
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s, border-color 0.2s;
}

.page-contact__about-link a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.page-contact__partnership-board {
  border: 2px solid rgba(255, 184, 0, 0.55);
  background: var(--bg-raised);
  padding: 1.75rem 1.5rem;
  position: relative;
}

.page-contact__partnership-board::after {
  content: "";
  position: absolute;
  right: -8px;
  bottom: -8px;
  width: 28px;
  height: 28px;
  background: var(--gold);
}

.page-contact__partnership-board h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin: 1rem 0 0.5rem;
}

.page-contact__partnership-board p {
  color: var(--text-sub);
  font-size: 0.92rem;
  margin: 0 0 0.75rem;
}

.page-contact__partnership-board .page-contact__subject-demo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--gold);
  background: rgba(255, 184, 0, 0.07);
  border: 1px solid rgba(255, 184, 0, 0.32);
  padding: 0.6rem 0.8rem;
  margin: 0 0 1.25rem;
  word-break: break-all;
}

.page-contact__partnership-mail {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 0.15rem;
  display: inline-block;
  word-break: break-all;
}

/* ---- 04 工作流程 ---- */
.page-contact__workflow {
  background:
    linear-gradient(var(--contact-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid-line) 1px, transparent 1px),
    var(--bg-raised);
  background-size: 52px 52px, 52px 52px, auto;
}

.page-contact__workflow-header {
  margin-bottom: 2.5rem;
}

.page-contact__workflow-header h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  margin: 0.35rem 0 0.6rem;
}

.page-contact__workflow-header .section-subtitle {
  color: var(--text-sub);
  margin-bottom: 0;
  max-width: 38em;
}

.page-contact__workflow-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.page-contact__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.5rem 1.25rem;
  background: var(--bg-deep);
  border: 1px solid var(--contact-line);
  border-left: 4px solid var(--contact-blue);
}

.page-contact__step-num {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: rgba(0, 166, 255, 0.3);
  line-height: 1;
}

.page-contact__step-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
}

.page-contact__step-body p {
  margin: 0;
  color: var(--text-sub);
  font-size: 0.9rem;
}

/* ---- 平板：768px ---- */
@media (min-width: 768px) {
  .page-contact__services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }

  .page-contact__workflow-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .page-contact__channel-card {
    padding: 0.75rem 2rem 2rem;
  }

  .page-contact__services-top {
    grid-template-columns: 320px 1fr;
    gap: 2rem;
  }

  .page-contact__partnership-board {
    margin: 0;
  }
}

/* ---- 桌面：1080px ---- */
@media (min-width: 1080px) {
  .page-contact__hero-grid {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 3rem;
  }

  .page-contact__hero-meta {
    min-width: 350px;
  }

  .page-contact__channels-layout {
    grid-template-columns: minmax(0, 5fr) 5fr;
    gap: 4rem;
  }

  .page-contact__services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact__services-top {
    grid-template-columns: 400px 1fr;
    gap: 3rem;
  }

  .page-contact__partnership-grid {
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 4rem;
  }

  .page-contact__workflow-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .page-contact__step {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    border-left-width: 1px;
    border-top: 4px solid var(--contact-blue);
    padding: 1.75rem;
  }

  .page-contact__step-num {
    font-size: 2.6rem;
  }
}