.page-contact {
  --contact-cut: 18px;
  overflow-x: clip;
}

.page-contact .contact-top {
  padding-top: clamp(1.1rem, 3vw, 1.7rem);
  padding-bottom: .2rem;
}

/* 首屏 */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--night);
  border-bottom: 1px solid var(--rule);
}

.page-contact .contact-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  opacity: .3;
  filter: saturate(.85);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(78% 68% at 12% 0%, rgba(43, 232, 165, .16), transparent 62%),
    linear-gradient(180deg, rgba(10, 27, 22, .68) 0%, rgba(10, 27, 22, .9) 58%, var(--night) 100%);
}

.page-contact .contact-hero-inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(2.2rem, 6vw, 4.4rem);
  padding-bottom: clamp(2.2rem, 6vw, 4rem);
}

.page-contact .contact-kicker {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--signal);
}

.page-contact .contact-h1 {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5.4vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-contact .contact-lede {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.4vw, 1.06rem);
  line-height: 1.75;
  color: var(--ink-soft);
}

/* 渠道卡 */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-contact .channel {
  position: relative;
  min-width: 0;
  padding: 1.35rem 1.3rem 1.5rem;
  background: rgba(15, 42, 34, .92);
  clip-path: polygon(0 0, calc(100% - var(--contact-cut)) 0, 100% var(--contact-cut), 100% 100%, var(--contact-cut) 100%, 0 calc(100% - var(--contact-cut)));
  transition: background-color .25s ease, transform .25s ease;
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  background: var(--stand);
  transform: translateY(-2px);
}

.page-contact .channel-head {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: .9rem;
}

.page-contact .channel-no {
  font-size: .82rem;
  color: var(--signal);
}

.page-contact .channel-name {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .95rem;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .channel-icon {
  color: var(--signal-dim);
}

.page-contact .channel-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(.98rem, 2.6vw, 1.12rem);
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  word-break: break-all;
}

.page-contact .channel-val--addr {
  font-family: var(--font-body);
  font-weight: 600;
  word-break: break-word;
}

.page-contact .channel-for {
  margin: .8rem 0 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-contact .channel-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem;
  margin-top: 1rem;
}

.page-contact .channel-tag {
  font-size: .78rem;
}

/* 章节壳（页面内统一节奏） */
.page-contact .issue-block,
.page-contact .fix-block,
.page-contact .sla-block,
.page-contact .next-block {
  padding-top: clamp(2.4rem, 6vw, 4rem);
}

.page-contact .partner-block {
  padding-top: clamp(2.4rem, 6vw, 4rem);
}

/* 问题分类 */
.page-contact .issue-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-contact .issue {
  position: relative;
  padding: 1.3rem 1.2rem 1.45rem;
  background: linear-gradient(158deg, var(--stand), var(--field));
  border-top: 3px solid var(--signal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--contact-cut)), calc(100% - var(--contact-cut)) 100%, 0 100%);
  transition: transform .25s ease;
}

.page-contact .issue:hover {
  transform: translateY(-2px);
}

.page-contact .issue--b {
  border-top-color: var(--signal-dim);
}

.page-contact .issue--c {
  border-top-color: var(--amber);
}

.page-contact .issue--d {
  border-top-color: var(--amber-dim);
}

.page-contact .issue-key {
  margin: 0 0 .5rem;
  font-size: .82rem;
  color: var(--ink-soft);
  letter-spacing: .08em;
}

.page-contact .issue-title {
  margin: 0 0 .6rem;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .issue-text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-contact .issue-text a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .issue-foot {
  margin: 1.2rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--amber);
  font-size: .92rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 纠错说明 */
.page-contact .fix {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 4vw, 2.4rem);
  align-items: start;
}

.page-contact .fix-lede {
  margin: 0 0 1rem;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .fix-item {
  border-bottom: 1px dashed var(--rule);
}

.page-contact .fix-item label {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .8rem 0;
  font-size: .95rem;
  line-height: 1.65;
  color: var(--ink);
  cursor: pointer;
}

.page-contact .fix-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: .2rem 0 0;
  background: var(--stand);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  transition: background-color .2s ease, border-color .2s ease;
}

.page-contact .fix-item input[type="checkbox"]:checked {
  background: var(--signal);
  border-color: var(--signal);
}

.page-contact .fix-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-contact .fix-item input[type="checkbox"]:checked + span {
  color: var(--signal);
}

.page-contact .fix-note {
  margin: 1.1rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .fix-figure {
  margin: 0;
  --bare: 0;
}

/* 处理时效 */
.page-contact .sla {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}

.page-contact .sla-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .35rem 1.2rem;
  padding: .95rem 1.15rem;
  background: var(--field);
  border-left: 3px solid var(--signal);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-contact .sla-row--amber {
  border-left-color: var(--amber);
}

.page-contact .sla-name {
  font-size: .97rem;
  font-weight: 600;
  color: var(--ink);
}

.page-contact .sla-time {
  font-size: .9rem;
  color: var(--signal);
}

.page-contact .sla-row--amber .sla-time {
  color: var(--amber);
}

.page-contact .sla-note {
  margin-top: 1.2rem;
  max-width: 66ch;
}

.page-contact .sla-note p {
  margin: 0 0 .8rem;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .sla-note p:last-child {
  margin-bottom: 0;
}

.page-contact .sla-note .num {
  color: var(--ink);
}

/* 内容共建 */
.page-contact .partner {
  padding: clamp(1.5rem, 4vw, 2.4rem);
  background: linear-gradient(150deg, var(--field), var(--night) 78%);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-contact .partner-lede {
  margin: 0 0 1.5rem;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .partner-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: .8rem;
  margin-bottom: 1.5rem;
}

.page-contact .partner-stat {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: .85rem 1rem;
  background: var(--stand);
}

.page-contact .partner-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-contact .partner-key {
  font-size: .92rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-contact .partner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

/* 底部索引带 */
.page-contact .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-contact .route-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 1rem;
  row-gap: .3rem;
  align-items: baseline;
  padding: .95rem 1.15rem;
  background: var(--field);
  color: var(--ink);
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, calc(100% - 16px) 100%, 0 100%);
  transition: background-color .22s ease, transform .22s ease;
}

.page-contact .route-list a:hover,
.page-contact .route-list a:focus-visible {
  background: var(--stand);
  transform: translateY(-2px);
}

.page-contact .route-no {
  font-size: .82rem;
  color: var(--signal);
}

.page-contact .route-meta {
  font-size: 1rem;
  font-weight: 700;
}

.page-contact .route-desc {
  grid-column: 2;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.page-contact .next-foot {
  display: flex;
  justify-content: center;
  margin-top: 1.8rem;
}

.page-contact .to-top {
  text-decoration: none;
}

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

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

@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .fix {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-contact .issue-foot {
    max-width: 70ch;
  }
}

@media (min-width: 1040px) {
  .page-contact .issue-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .contact-h1 {
    font-size: 3.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .issue,
  .page-contact .route-list a,
  .page-contact .fix-item input[type="checkbox"] {
    transition: none;
  }

  .page-contact .channel:hover,
  .page-contact .channel:focus-within,
  .page-contact .issue:hover,
  .page-contact .route-list a:hover,
  .page-contact .route-list a:focus-visible {
    transform: none;
  }
}