.page-contact {
  display: block;
  padding-bottom: clamp(56px, 9vw, 110px);
  background-image:
    linear-gradient(rgba(140, 255, 228, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 255, 228, .04) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: center top;
}

.page-contact .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: clamp(18px, 3vw, 28px) 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-contact .crumb__item + .crumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-grass-mid);
}

.page-contact .crumb__item[aria-current="page"] {
  color: var(--c-cyan);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  margin-top: clamp(16px, 3vw, 28px);
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 48px) clamp(30px, 5vw, 52px);
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(120% 110% at 10% 0%, rgba(25, 240, 195, .16), transparent 58%),
    radial-gradient(90% 90% at 100% 100%, rgba(108, 92, 231, .18), transparent 62%),
    var(--glass);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -100px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 1px solid var(--line-mid);
  background: radial-gradient(circle, rgba(25, 240, 195, .14), transparent 70%);
  pointer-events: none;
}

.page-contact .contact-hero .eyebrow {
  color: var(--c-cyan-soft);
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  max-width: 24ch;
  font-size: clamp(30px, 5.4vw, 60px);
  font-weight: 300;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--c-white);
}

.page-contact .contact-hero .lede {
  position: relative;
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--c-mist);
}

.page-contact .hero-facts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 左主区 + 右侧栏 ---------- */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  margin-top: clamp(32px, 5vw, 56px);
}

.page-contact .contact-main {
  display: grid;
  gap: clamp(34px, 5vw, 62px);
  min-width: 0;
}

.page-contact .contact-section {
  position: relative;
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 110px;
}

.page-contact .contact-section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-violet));
}

.page-contact .section-head {
  margin-bottom: 14px;
}

.page-contact .section-head__index {
  color: var(--c-cyan);
}

.page-contact .section-head__title {
  color: var(--c-white);
}

.page-contact .section-lede {
  max-width: 66ch;
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 联系通道卡 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 22px 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
  background: var(--glass);
  transition:
    border-color var(--step-mid) var(--ease),
    transform var(--step-mid) var(--ease),
    background-color var(--step-mid) var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 0;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--c-cyan);
  opacity: .55;
  transition: opacity var(--step-fast) var(--ease);
}

.page-contact .channel-card:nth-child(2)::before {
  background: var(--c-violet);
}

.page-contact .channel-card:nth-child(3)::before {
  background: var(--c-orange);
}

.page-contact .channel-card:hover {
  border-color: var(--c-cyan-soft);
  background: rgba(16, 56, 42, .78);
  transform: translateX(4px);
}

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

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

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.55;
  color: var(--c-white);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 图片容器 ---------- */
.page-contact .media-frame {
  margin: clamp(24px, 4vw, 34px) 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
  background: var(--glass-strong);
  overflow: hidden;
}

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

.page-contact .media-frame--diagram img {
  opacity: .88;
}

.page-contact .media-frame__caption {
  margin: 0;
  padding: 12px 18px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-mist);
}

/* ---------- 值守时段 ---------- */
.page-contact .shift-bar {
  margin: 4px 0 22px;
}

.page-contact .shift-bar__scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-mist);
}

.page-contact .shift-bar__track {
  margin-top: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(27, 90, 65, .6);
  overflow: hidden;
}

.page-contact .shift-bar__fill {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-violet));
}

.page-contact .shift-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .shift-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(16, 56, 42, .42);
}

.page-contact .shift-list__num {
  flex: none;
  min-width: 1.6em;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .shift-list__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 步骤条 ---------- */
.page-contact .step-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .step {
  position: relative;
  padding: 16px 18px 16px 68px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--c-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(11, 31, 22, .6);
  transition:
    border-color var(--step-fast) var(--ease),
    background-color var(--step-fast) var(--ease);
}

.page-contact .step:hover {
  border-color: var(--line-mid);
  border-left-color: var(--c-cyan-soft);
  background: rgba(16, 56, 42, .62);
}

.page-contact .step__num {
  position: absolute;
  top: 17px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .step__title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--c-white);
}

.page-contact .step__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-contact .step-list--violet .step {
  border-left-color: var(--c-violet);
}

.page-contact .step-list--violet .step__num {
  color: var(--c-violet-soft);
}

.page-contact .step-list--violet .step:hover {
  border-left-color: var(--c-violet-soft);
}

/* ---------- 请求写法示例 ---------- */
.page-contact .req-sample {
  margin: 18px 0 0;
  padding: 14px 18px;
  border: 1px dashed var(--line-mid);
  border-radius: var(--radius-sm);
  background: rgba(11, 31, 22, .5);
}

.page-contact .req-sample summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--c-cyan-soft);
}

.page-contact .req-sample[open] summary {
  color: var(--c-white);
}

.page-contact .req-sample pre {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--c-mist);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-contact .req-sample--violet {
  border-color: rgba(180, 170, 255, .45);
}

.page-contact .req-sample--violet summary {
  color: var(--c-violet-soft);
}

/* ---------- 纠错面板 ---------- */
.page-contact .grid--2 {
  gap: 16px;
}

.page-contact .panel {
  padding: 20px;
}

.page-contact .panel__label {
  color: var(--c-cyan-soft);
}

.page-contact .panel .list-flat {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--c-mist);
}

/* ---------- 合作列表 ---------- */
.page-contact .coop-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop-item {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
  background:
    linear-gradient(160deg, rgba(108, 92, 231, .14), transparent 62%),
    var(--glass);
  transition: border-color var(--step-fast) var(--ease);
}

.page-contact .coop-item:hover {
  border-color: var(--line-mid);
}

.page-contact .coop-item__title {
  margin: 0;
  font-size: 15px;
  color: var(--c-white);
}

.page-contact .coop-item__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 右侧栏 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-contact .rail-card {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-panel);
  background: var(--glass);
}

.page-contact .rail-card--version {
  border-color: var(--line-mid);
  background:
    linear-gradient(150deg, rgba(25, 240, 195, .16), rgba(11, 31, 22, .92) 72%);
}

.page-contact .rail-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-cyan-soft);
}

.page-contact .rail-card__version {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--c-white);
}

.page-contact .rail-card__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-mist);
}

.page-contact .rail-links {
  display: grid;
  gap: 2px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .rail-links a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--c-mist);
  text-decoration: none;
  transition:
    color var(--step-fast) var(--ease),
    background-color var(--step-fast) var(--ease),
    transform var(--step-fast) var(--ease);
}

.page-contact .rail-links a:hover,
.page-contact .rail-links a:focus-visible {
  color: var(--c-cyan);
  background: rgba(25, 240, 195, .1);
  transform: translateX(4px);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .shift-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-contact .coop-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 1fr) 264px;
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .step,
  .page-contact .coop-item,
  .page-contact .rail-links a {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .rail-links a:hover,
  .page-contact .rail-links a:focus-visible {
    transform: none;
  }
}