.page-contact {
  --pc-cut: 18px;
  --pc-gap: clamp(14px, 2.4vw, 24px);
  color: var(--ab-text);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  padding-block: clamp(32px, 5.5vw, 72px) clamp(36px, 6vw, 76px);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(59, 232, 168, 0.10), transparent 58%),
    linear-gradient(170deg, var(--ab-surface) 0%, var(--ab-ink) 64%);
  border-bottom: 1px solid var(--ab-line);
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(340px, 48%);
  height: 3px;
  background: linear-gradient(90deg, var(--ab-accent), rgba(59, 232, 168, 0));
}

.page-contact .pc-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
  margin-top: clamp(18px, 3vw, 32px);
}

.page-contact .pc-hero__title {
  margin: 14px 0 0;
  font-size: clamp(1.95rem, 6.2vw, 3.6rem);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.03em;
}

.page-contact .pc-hero__title strong {
  font-weight: 800;
  color: var(--ab-accent);
}

.page-contact .pc-hero__copy .ab-lead {
  margin-top: clamp(14px, 2vw, 22px);
}

.page-contact .pc-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ab-muted);
}

.page-contact .pc-hero__quick li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-contact .pc-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ab-accent);
  box-shadow: 0 0 0 3px rgba(59, 232, 168, 0.14);
  flex: none;
}

.page-contact .pc-dot--amber {
  background: var(--ab-amber);
  box-shadow: 0 0 0 3px rgba(242, 162, 60, 0.16);
}

.page-contact .pc-hero__media {
  margin: 0;
}

.page-contact .pc-hero__media .ab-figure {
  border: 1px solid var(--ab-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%);
}

.page-contact .pc-hero__media img,
.page-contact .pc-howto__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* ---------- 章节小标题 ---------- */
.page-contact .pc-sec-head {
  max-width: 620px;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-contact .pc-sec-title {
  margin: 10px 0 0;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.page-contact .pc-sec-sub {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-muted);
}

/* ---------- 渠道条 ---------- */
.page-contact .pc-channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
}

.page-contact .pc-channel {
  position: relative;
  padding: 26px 22px 28px;
  background: var(--ab-surface);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%);
  transition: background 0.35s var(--ab-ease);
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--ab-line);
  transition: background 0.35s var(--ab-ease);
}

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  background: var(--ab-layer);
}

.page-contact .pc-channel:hover::before,
.page-contact .pc-channel:focus-within::before {
  background: var(--ab-accent);
}

.page-contact .pc-channel__tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--ab-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ab-accent);
  border: 1px solid rgba(59, 232, 168, 0.4);
  border-radius: 2px;
}

.page-contact .pc-channel__tag--amber {
  color: var(--ab-amber);
  border-color: rgba(242, 162, 60, 0.44);
}

.page-contact .pc-channel__name {
  margin: 16px 0 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ab-muted);
}

.page-contact .pc-channel__value {
  margin: 10px 0 0;
  font-family: var(--ab-mono);
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--ab-text);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel__fit {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ab-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-muted);
  transition: color 0.35s var(--ab-ease);
}

.page-contact .pc-channel:hover .pc-channel__fit,
.page-contact .pc-channel:focus-within .pc-channel__fit {
  color: var(--ab-text);
}

/* ---------- 反馈写法 ---------- */
.page-contact .pc-howto {
  background: linear-gradient(180deg, var(--ab-ink) 0%, rgba(14, 31, 26, 0.6) 100%);
  border-top: 1px solid var(--ab-line);
}

.page-contact .pc-howto__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
}

.page-contact .pc-howto__lead {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 36em;
}

.page-contact .pc-template {
  margin-top: clamp(20px, 3vw, 28px);
  background: var(--ab-ink);
  border: 1px solid var(--ab-line);
  border-radius: 10px;
  overflow: hidden;
}

.page-contact .pc-template__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: var(--ab-layer);
  border-bottom: 1px solid var(--ab-line);
}

.page-contact .pc-template__bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(159, 184, 175, 0.35);
}

.page-contact .pc-template__bar span:first-child {
  background: rgba(242, 162, 60, 0.7);
}

.page-contact .pc-template__bar em {
  margin-left: 8px;
  font-family: var(--ab-mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ab-muted);
}

.page-contact .pc-template__body {
  margin: 0;
  padding: 20px 18px 22px;
  overflow-x: auto;
  font-family: var(--ab-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--ab-text);
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}

.page-contact .pc-template__body code {
  font-family: inherit;
}

.page-contact .pc-template__body .k {
  color: var(--ab-accent);
}

.page-contact .pc-template__body b {
  color: var(--ab-amber);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-contact .pc-howto__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--ab-amber);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-muted);
}

.page-contact .pc-howto__side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  align-content: start;
}

.page-contact .pc-howto__figure {
  margin: 0;
}

.page-contact .pc-howto__figure .ab-figure {
  border: 1px solid var(--ab-line);
  border-radius: 10px;
  overflow: hidden;
}

.page-contact .pc-howto__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: 10px;
  overflow: hidden;
}

.page-contact .pc-howto__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ab-surface);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-text);
}

.page-contact .pc-howto__list li span {
  flex: none;
  font-family: var(--ab-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ab-accent);
}

/* ---------- 处理路径 ---------- */
.page-contact .pc-paths {
  border-top: 1px solid var(--ab-line);
}

.page-contact .pc-table {
  min-width: 580px;
}

.page-contact .pc-table__caption {
  padding: 0 0 12px;
  text-align: left;
  font-family: var(--ab-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ab-muted);
}

.page-contact .pc-table th[scope="row"] {
  color: var(--ab-text);
  font-weight: 600;
  white-space: nowrap;
}

.page-contact .pc-table td.is-num {
  color: var(--ab-amber);
  white-space: nowrap;
}

/* ---------- 备案收束带 ---------- */
.page-contact .pc-filing {
  padding-block: clamp(32px, 5vw, 58px);
  background: var(--ab-layer);
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.page-contact .pc-filing__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-contact .pc-filing__title {
  margin: 10px 0 0;
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .pc-filing__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-muted);
  max-width: 30em;
}

.page-contact .pc-filing__list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: 8px;
  overflow: hidden;
}

.page-contact .pc-filing__item {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 12px 16px;
  background: var(--ab-surface);
}

.page-contact .pc-filing__item dt {
  flex: none;
  width: 5.2em;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ab-muted);
  padding-top: 2px;
}

.page-contact .pc-filing__item dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ab-text);
  overflow-wrap: anywhere;
}

.page-contact .pc-filing__item dd.is-num {
  font-family: var(--ab-mono);
  letter-spacing: 0.02em;
}

/* ---------- 栏目页入口 ---------- */
.page-contact .pc-entry {
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-contact .pc-entry__panel {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(59, 232, 168, 0.10), transparent 60%),
    linear-gradient(125deg, var(--ab-surface) 0%, var(--ab-layer) 100%);
  border-left: 3px solid var(--ab-amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-contact .pc-entry__title {
  margin: 10px 0 0;
  font-size: clamp(1.25rem, 3.2vw, 1.75rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.page-contact .pc-entry__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-muted);
}

.page-contact .pc-entry__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: 8px;
  overflow: hidden;
}

.page-contact .pc-entry__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  background: rgba(8, 17, 15, 0.55);
  font-size: 14px;
  color: var(--ab-text);
  text-decoration: none;
  transition: background 0.28s var(--ab-ease), color 0.28s var(--ab-ease);
}

.page-contact .pc-entry__links a::after {
  content: "→";
  font-family: var(--ab-mono);
  color: var(--ab-mint);
  transition: transform 0.28s var(--ab-ease);
}

.page-contact .pc-entry__links a:hover,
.page-contact .pc-entry__links a:focus-visible {
  background: var(--ab-surface);
  color: var(--ab-accent);
}

.page-contact .pc-entry__links a:hover::after {
  transform: translateX(4px);
}

.page-contact .pc-entry__trace {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ab-muted);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .pc-channel-grid > .pc-channel:first-child {
    grid-column: 1 / -1;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

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

  .page-contact .pc-channel-grid > .pc-channel:first-child {
    grid-column: auto;
  }

  .page-contact .pc-howto__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-contact .pc-filing__inner {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-channel,
  .page-contact .pc-channel::before,
  .page-contact .pc-channel__fit,
  .page-contact .pc-entry__links a,
  .page-contact .pc-entry__links a::after {
    transition: none;
  }
}