.page-contact {
  --contact-rail-w: 180px;
  --contact-stack: clamp(28px, 5vw, 72px);
  background: var(--c-night);
  color: var(--c-body);
  font-family: var(--font-sans);
  padding-bottom: clamp(72px, 12vw, 160px);
  overflow-x: hidden;
}

/* ---------- 首屏氛围条 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
}

.page-contact .contact-hero-img {
  display: block;
  width: 100%;
  height: clamp(210px, 32vw, 380px);
  object-fit: cover;
  max-width: 100%;
  opacity: .62;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(7, 12, 22, .30) 0%, rgba(7, 12, 22, .88) 72%, var(--c-night) 100%),
    linear-gradient(118deg, rgba(77, 225, 255, .12) 0%, rgba(198, 255, 61, .07) 52%, rgba(7, 12, 22, 0) 78%);
}

.page-contact .contact-hero-inner {
  position: relative;
  z-index: 2;
  margin-top: -64px;
  padding-bottom: 8px;
}

.page-contact .contact-hero .eyebrow {
  margin: 0;
  color: var(--c-green);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-contact .contact-hero .display {
  margin: 14px 0 0;
  font-weight: 200;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--c-white);
}

.page-contact .contact-hero .lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(14px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--c-body);
}

/* ---------- 主栅格 ---------- */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-stack);
  margin-top: clamp(44px, 7vw, 100px);
}

.page-contact .contact-body {
  min-width: 0;
}

/* ---------- 左侧索引带 ---------- */
.page-contact .rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-muted);
}

.page-contact .rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-contact .rail-list::-webkit-scrollbar {
  display: none;
}

.page-contact .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  color: var(--c-body);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  background: rgba(14, 21, 38, .6);
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-contact .rail-list a:hover,
.page-contact .rail-list a[aria-current="true"] {
  border-color: var(--s-green-line);
  color: var(--c-white);
  background: var(--s-green);
}

.page-contact .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--c-green);
}

/* ---------- 章节 ---------- */
.page-contact .contact-section {
  padding-top: clamp(52px, 8vw, 104px);
}

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

.page-contact .index-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-green);
}

.page-contact .headline {
  margin: 12px 0 0;
  font-size: clamp(23px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -.012em;
  line-height: 1.2;
  color: var(--c-white);
}

/* ---------- 联系方式卡片 ---------- */
.page-contact .contact-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3vw, 38px);
}

.page-contact .channel-card {
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-panel);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-contact .channel-card:hover {
  transform: translateY(-2px);
  border-color: var(--s-green-line);
}

.page-contact .channel-card--orange:hover {
  border-color: var(--s-orange-line);
}

.page-contact .channel-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

.page-contact .channel-value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.24;
  color: var(--c-white);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-value--xl {
  font-size: clamp(16px, 2.3vw, 28px);
  color: var(--c-green);
}

.page-contact .channel-value--lg {
  font-size: clamp(26px, 4.4vw, 52px);
  color: var(--c-orange);
  letter-spacing: .01em;
}

.page-contact .channel-value--sm {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.8vw, 19px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-white);
}

.page-contact .channel-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-body);
}

.page-contact .contact-figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-contact .contact-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  filter: brightness(.72) saturate(.9);
}

.page-contact .contact-figure figcaption {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 服务时间 ---------- */
.page-contact .hours-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 3vw, 38px);
}

.page-contact .hours-table {
  width: 100%;
  border-collapse: collapse;
}

.page-contact .hours-table caption {
  padding-bottom: 16px;
  text-align: left;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .hours-table th,
.page-contact .hours-table td {
  padding: 16px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .hours-table th {
  position: relative;
  width: 32%;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--c-white);
}

.page-contact .hours-table th::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--c-orange);
  opacity: 0;
  transition: opacity .18s var(--ease);
}

.page-contact .hours-table td {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-body);
}

.page-contact .hours-table tbody tr {
  transition: background .18s var(--ease);
}

.page-contact .hours-table tbody tr:hover {
  background: rgba(255, 255, 255, .03);
}

.page-contact .hours-table tbody tr:hover th::before {
  opacity: 1;
}

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

.page-contact .node-graphic {
  align-self: start;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(77, 225, 255, .07) 0%, rgba(14, 21, 38, .9) 46%, rgba(7, 12, 22, .8) 100%);
  color: var(--c-ice);
}

.page-contact .node-graphic svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 320px;
  opacity: .85;
}

.page-contact .node-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-body);
}

/* ---------- 三步反馈 ---------- */
.page-contact .steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .step {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-panel);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-contact .step:hover {
  transform: translateY(-2px);
  border-color: var(--s-green-line);
}

.page-contact .step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-orange);
}

.page-contact .step-title {
  margin: 10px 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--c-white);
}

.page-contact .step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-body);
}

/* ---------- 合作与线索 ---------- */
.page-contact .collab-grid {
  margin-top: clamp(24px, 3vw, 38px);
}

.page-contact .collab-card {
  padding-top: 22px;
  border-top: 1px solid var(--c-line-strong);
}

.page-contact .collab-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--c-white);
}

.page-contact .collab-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .collab-links {
  margin: 30px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .collab-links a {
  color: var(--c-ice);
  text-decoration: none;
  border-bottom: 1px solid var(--s-ice-line);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .collab-links a:hover {
  color: var(--c-green);
  border-bottom-color: var(--s-green-line);
}

/* ---------- 常见问题浮岛 ---------- */
.page-contact .faq-lede {
  margin: clamp(22px, 2.6vw, 30px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .faq-dock {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--c-line);
  border-radius: 28px;
  background: linear-gradient(118deg, rgba(14, 21, 38, .94) 0%, rgba(7, 12, 22, .72) 100%);
}

.page-contact .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--c-line-strong);
  border-radius: 999px;
  background: rgba(7, 12, 22, .5);
  color: var(--c-body);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-contact .faq-chip::after {
  content: "›";
  color: var(--c-muted);
  transition: color .18s var(--ease);
}

.page-contact .faq-chip:hover {
  border-color: var(--s-green-line);
  background: var(--s-green);
  color: var(--c-white);
}

.page-contact .faq-chip:hover::after {
  color: var(--c-green);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero-inner {
    margin-top: -110px;
  }

  .page-contact .contact-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .channel-card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-contact .hours-wrap {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .step::after {
    content: "→";
    position: absolute;
    top: 50%;
    right: -18px;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 16px;
    color: var(--c-line-strong);
    pointer-events: none;
  }

  .page-contact .step:last-child::after {
    content: none;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-layout {
    grid-template-columns: var(--contact-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 96px);
  }

  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-contact .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-contact .rail-list a {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (min-width: 1200px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .channel-card--wide {
    grid-column: span 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .step,
  .page-contact .faq-chip,
  .page-contact .rail-list a,
  .page-contact .hours-table tbody tr {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .step:hover {
    transform: none;
  }
}