.page-contact {
  --rail-width: 318px;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
}

.page-contact .contact-wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--edge);
}

.page-contact .breadcrumb {
  padding-top: clamp(20px, 3vw, 30px);
}

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .breadcrumb-link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .breadcrumb-link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb-current {
  color: var(--text);
}

.page-contact .breadcrumb-item::after {
  content: "/";
  margin-left: 8px;
  color: var(--line);
}

/* 首屏 */
.page-contact .contact-lead {
  padding-block: clamp(32px, 5.5vw, 68px) clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(to right, rgba(30, 58, 82, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 82, 0.45) 1px, transparent 1px);
  background-size: 64px 64px;
}

.page-contact .lead-code,
.page-contact .section-code,
.page-contact .rail-index,
.page-contact .rail-heading,
.page-contact .type-link {
  font-family: var(--mono);
  text-transform: uppercase;
}

.page-contact .lead-code {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact h1 {
  margin: 0 0 20px;
  max-width: 20ch;
  font-family: var(--mono);
  font-size: clamp(2.1rem, 5.2vw, 3.8rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .lead-text {
  margin: 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .lead-hint {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .lead-hint li {
  padding-left: 14px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .hint-key {
  margin-right: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text);
}

/* 主体双栏 */
.page-contact .contact-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(36px, 5vw, 56px);
  padding-block: clamp(34px, 5vw, 60px) clamp(48px, 7vw, 96px);
}

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

.page-contact .rail-heading {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-contact .rail-card {
  position: relative;
  margin-bottom: 12px;
  padding: 20px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .rail-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--card-accent, var(--cyan));
  opacity: 0.65;
  transition: opacity var(--dur) var(--ease);
}

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

.page-contact .rail-card:hover::before {
  opacity: 1;
}

.page-contact .rail-card[data-accent="cyan"] { --card-accent: var(--cyan); }
.page-contact .rail-card[data-accent="amber"] { --card-accent: var(--amber); }
.page-contact .rail-card[data-accent="violet"] { --card-accent: var(--violet); }

.page-contact .rail-index {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .rail-value {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--text);
  word-break: break-word;
  user-select: all;
}

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

.page-contact .rail-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 章节 */
.page-contact .contact-main {
  min-width: 0;
}

.page-contact .contact-section + .contact-section {
  margin-top: clamp(44px, 6vw, 78px);
  padding-top: clamp(40px, 5.5vw, 68px);
  border-top: 1px solid var(--line);
}

.page-contact .section-code {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .section-title {
  margin: 0 0 14px;
  max-width: 26ch;
  font-family: var(--mono);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  line-height: 1.28;
  color: var(--text);
}

.page-contact .section-lede {
  margin: 0 0 30px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

/* 反馈清单 */
.page-contact .feedback-list {
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .feedback-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .feedback-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 26px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .feedback-item:hover .feedback-num {
  border-color: var(--cyan);
}

.page-contact .feedback-name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

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

/* 处理节奏 */
.page-contact .flow-list {
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  border: 1px solid var(--line);
}

.page-contact .flow-step {
  padding: 24px 22px 26px;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

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

.page-contact .flow-step:hover {
  background: var(--panel-deep);
}

.page-contact .flow-num {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--line);
  transition: color var(--dur) var(--ease);
}

.page-contact .flow-step:hover .flow-num {
  color: var(--cyan);
}

.page-contact .flow-name {
  margin: 14px 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.page-contact .flow-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

/* 图组 */
.page-contact .contact-figure {
  margin: 0;
}

.page-contact .contact-figure .media-frame {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

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

.page-contact .media-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.68;
  color: var(--muted);
}

/* 常见类型 */
.page-contact .type-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--line);
}

.page-contact .type-card {
  position: relative;
  padding: 26px 22px 28px;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.page-contact .type-card:last-child {
  border-bottom: 0;
}

.page-contact .type-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--card-accent, var(--cyan));
  opacity: 0.5;
  transition: opacity var(--dur) var(--ease);
}

.page-contact .type-card:hover {
  background: var(--panel-deep);
}

.page-contact .type-card:hover::before {
  opacity: 1;
}

.page-contact .type-card[data-accent="cyan"] { --card-accent: var(--cyan); }
.page-contact .type-card[data-accent="amber"] { --card-accent: var(--amber); }
.page-contact .type-card[data-accent="violet"] { --card-accent: var(--violet); }

.page-contact .type-tag {
  display: inline-block;
  margin: 0 0 16px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--card-accent, var(--cyan));
}

.page-contact .type-name {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.page-contact .type-text {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .type-link {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease);
}

.page-contact .type-link:hover,
.page-contact .type-link:focus-visible {
  color: var(--amber);
}

/* 页尾补充 */
.page-contact .contact-coda {
  margin: clamp(34px, 5vw, 54px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-coda a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-coda a:hover,
.page-contact .contact-coda a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-contact a:focus-visible,
.page-contact .type-card:focus-within {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* 桌面 */
@media (min-width: 720px) {
  .page-contact .lead-hint {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
    max-width: 780px;
  }

  .page-contact .flow-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    display: grid;
  }

  .page-contact .flow-step {
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-contact .flow-step:last-child {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-body {
    grid-template-columns: var(--rail-width) minmax(0, 1fr);
    gap: clamp(44px, 4.5vw, 64px);
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 96px;
  }

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

  .page-contact .type-card {
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-contact .type-card:last-child {
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .rail-card,
  .page-contact .flow-step,
  .page-contact .type-card,
  .page-contact .feedback-num,
  .page-contact .type-link,
  .page-contact .breadcrumb-link,
  .page-contact .contact-coda a {
    transition: none;
  }
}