.page-contact {
  --pc-rail-w: 300px;
  --pc-radius: 0;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  border-bottom: 1px solid var(--line);
  background: var(--deep-900);
}

.page-contact .contact-hero-media {
  position: relative;
  overflow: hidden;
  background: var(--deep-900);
}

.page-contact .contact-hero-media img {
  display: block;
  width: 100%;
  height: clamp(190px, 32vw, 340px);
  object-fit: cover;
  object-position: center 60%;
}

.page-contact .contact-hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 24, 43, 0.15) 0%, rgba(6, 24, 43, 0.92) 100%);
  pointer-events: none;
  z-index: 1;
}

.page-contact .contact-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 68, 104, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 68, 104, 0.4) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.28;
  pointer-events: none;
  z-index: 2;
}

.page-contact .contact-hero-body {
  position: relative;
  z-index: 3;
  margin-top: clamp(-96px, -7vw, -56px);
  padding-bottom: clamp(30px, 5vw, 54px);
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 40px);
  margin-top: 20px;
}

.page-contact .contact-hero-title h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(29px, 5.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 16ch;
}

.page-contact .contact-hero-copy .lede {
  margin: 0;
  color: var(--mist);
  font-size: 17px;
  line-height: 1.75;
  max-width: 60ch;
}

.page-contact .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 5vw, 68px);
  padding-block: clamp(34px, 5.5vw, 72px);
}

/* ---------- 左侧信息卡 ---------- */
.page-contact .contact-rail {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-content: start;
}

.page-contact .rail-card {
  border: 1px solid var(--line);
  background: var(--deep-800);
  padding: 18px 20px 20px;
  transition: border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.page-contact .rail-card:hover,
.page-contact .rail-card:focus-within {
  border-color: var(--cyan);
  background: var(--deep-700);
}

.page-contact .rail-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-contact .rail-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-contact .rail-value--short {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
}

.page-contact .rail-note {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 右栏章节 ---------- */
.page-contact .contact-flow {
  display: grid;
  gap: 0;
}

.page-contact .contact-block {
  border-top: 1px solid var(--line);
  padding-block: clamp(26px, 3.6vw, 44px);
}

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

.page-contact .contact-block > h2 {
  margin: 10px 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-contact .contact-block .chapter-no {
  display: inline-block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--coral);
}

.page-contact .contact-block > p.contact-text,
.page-contact .contact-text {
  margin: 0 0 12px;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.78;
  max-width: 62ch;
}

.page-contact .contact-text:last-child {
  margin-bottom: 0;
}

/* ---------- 要点清单 ---------- */
.page-contact .contact-bullets {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  max-width: 62ch;
}

.page-contact .contact-bullets li {
  position: relative;
  padding: 10px 0 10px 26px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-contact .contact-bullets li:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-bullets li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 8px;
  height: 2px;
  background: var(--coral);
}

/* ---------- 标题示例块 ---------- */
.page-contact .subject-demo {
  margin: 20px 0 22px;
  border: 1px solid rgba(245, 185, 66, 0.45);
  border-left: 3px solid var(--gold);
  background: rgba(245, 185, 66, 0.07);
  padding: 16px 18px 18px;
  max-width: 62ch;
}

.page-contact .subject-demo-label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-contact .subject-demo-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 17px);
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 处理流程 ---------- */
.page-contact .step-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line);
}

.page-contact .step {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 30px);
}

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

.page-contact .step::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
}

.page-contact .step-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .step h3 {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-contact .step .contact-text {
  font-size: 15px;
  margin-bottom: 0;
}

.page-contact .flow-figure {
  margin-top: clamp(24px, 3.4vw, 38px);
  border: 1px solid var(--line);
}

/* ---------- 地址块 ---------- */
.page-contact .address-slab {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: var(--deep-800);
  padding: 20px 22px 22px;
  max-width: 62ch;
}

.page-contact .address-slab .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-contact .address-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 反馈写法列表 ---------- */
.page-contact .feedback-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .feedback-item {
  border: 1px solid var(--line);
  background: var(--deep-800);
  padding: 16px 18px 18px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-contact .feedback-item:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-contact .feedback-item .tag {
  display: inline-block;
  margin-bottom: 10px;
}

.page-contact .feedback-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .note {
  margin-top: 22px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 62ch;
}

.page-contact .note a {
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, 0.45);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-contact .note a:hover,
.page-contact .note a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--cyan);
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-contact .contact-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .feedback-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: end;
  }

  .page-contact .contact-layout {
    grid-template-columns: minmax(0, var(--pc-rail-w)) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-rail {
    grid-template-columns: 1fr;
    gap: 12px;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-contact .contact-block {
    padding-block: clamp(32px, 3.4vw, 52px);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .rail-card,
  .page-contact .feedback-item,
  .page-contact .note a {
    transition: none;
  }

  .page-contact .feedback-item:hover {
    transform: none;
  }
}
</main>