.page-contact {
  --contact-ink: var(--c-mist);
  --contact-dim: var(--c-stone);
  --contact-panel: rgba(20, 42, 69, .62);
  --contact-panel-solid: #142A45;
  --contact-max: 940px;
  --contact-card-pad: clamp(18px, 2.5vw, 26px);
  max-width: calc(var(--contact-max) + var(--pad-x) * 2);
  margin-inline: auto;
  padding: clamp(18px, 3vw, 34px) var(--pad-x) clamp(52px, 7vw, 96px);
  color: var(--contact-ink);
  font-family: var(--font-head);
  overflow-x: hidden;
  box-sizing: border-box;
}

.page-contact *,
.page-contact *::before,
.page-contact *::after {
  box-sizing: border-box;
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--contact-dim);
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-contact .contact-crumbs a {
  color: var(--contact-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 1px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .contact-crumbs a:hover,
.page-contact .contact-crumbs a:focus-visible {
  color: var(--c-lake);
  border-bottom-color: var(--c-lake);
}

.page-contact .contact-crumbs-sep {
  color: var(--c-slate);
}

/* ---------- 章节节奏 ---------- */
.page-contact .section {
  margin-top: clamp(34px, 5vw, 64px);
}

.page-contact .section + .section {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(30px, 4.5vw, 54px);
}

.page-contact .contact-channel {
  margin-top: 0;
}

.page-contact .section-head {
  margin-bottom: clamp(18px, 2.8vw, 28px);
}

.page-contact .sec-index {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-lake);
}

.page-contact .sec-index::after {
  content: "";
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--c-lake), rgba(47, 182, 196, 0));
}

.page-contact .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.7vw, 28px);
  line-height: 1.34;
  letter-spacing: .04em;
  color: var(--c-mist);
  margin: 12px 0 10px;
}

.page-contact .section-head .muted,
.page-contact .muted {
  font-size: 14px;
  line-height: 1.85;
  color: var(--contact-dim);
  margin: 0;
  max-width: 46ch;
}

/* ---------- 首屏渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
  align-items: start;
}

.page-contact .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-lake);
  margin: 0 0 12px;
}

.page-contact h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.3;
  letter-spacing: .035em;
  color: var(--c-mist);
  margin: 0 0 16px;
}

.page-contact .lede {
  font-size: 15px;
  line-height: 1.9;
  color: var(--contact-dim);
  margin: 0;
  max-width: 42ch;
}

.page-contact .channel-copy {
  position: relative;
  padding-left: 2px;
}

.page-contact .channel-copy h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-coral) 70%, rgba(242, 112, 74, 0));
  border-radius: 2px;
}

/* 图片框 */
.page-contact .contact-frame {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--c-night-deep);
  box-shadow: var(--shadow-card);
}

.page-contact .contact-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 14, 24, 0) 48%, rgba(6, 14, 24, .72));
  pointer-events: none;
}

.page-contact .contact-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
}

/* 渠道卡片 */
.page-contact .channel-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-contact .channel-card {
  position: relative;
  padding: calc(var(--contact-card-pad) + 12px) var(--contact-card-pad) var(--contact-card-pad);
  background: var(--contact-panel-solid);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: 5px 5px 0 0 var(--c-night-deep), 5px 5px 0 1px var(--line), var(--shadow-card);
}

.page-contact .channel-card.is-primary {
  border-color: rgba(232, 178, 76, .42);
  background: linear-gradient(170deg, rgba(232, 178, 76, .1), rgba(20, 42, 69, .95) 46%);
}

.page-contact .channel-tag {
  position: absolute;
  top: 0;
  left: var(--contact-card-pad);
  transform: translateY(-50%);
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--c-stone);
  background: var(--c-night);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.page-contact .channel-card.is-primary .channel-tag {
  color: var(--c-night);
  background: var(--c-gold);
  border-color: var(--c-gold);
}

.page-contact .channel-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--c-mist);
  margin: 0 0 10px;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-size: clamp(13.5px, 1.7vw, 15px);
  letter-spacing: .01em;
  line-height: 1.6;
  color: var(--c-volt);
  margin: 0 0 12px;
  overflow-wrap: anywhere;
}

.page-contact .channel-card.is-primary .channel-value {
  color: var(--c-gold);
}

.page-contact .channel-desc {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--contact-dim);
  margin: 0;
}

/* ---------- 邮件写法 ---------- */
.page-contact .howto-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-contact .howto-block {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--contact-panel);
  padding: var(--contact-card-pad);
}

.page-contact .howto-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-mist);
  margin: 0 0 14px;
}

.page-contact .howto-template {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--c-gold);
  background: rgba(232, 178, 76, .07);
  border: 1px dashed rgba(232, 178, 76, .42);
  border-radius: var(--r);
  padding: 12px 14px;
  margin: 0 0 14px;
  overflow-wrap: anywhere;
}

.page-contact .howto-list,
.page-contact .howto-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .howto-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--contact-dim);
  padding: 9px 0;
  border-top: 1px solid var(--line-soft);
  overflow-wrap: anywhere;
}

.page-contact .howto-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .howto-list .mono {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--c-lake);
}

.page-contact .howto-steps {
  counter-reset: hs;
}

.page-contact .howto-steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  counter-increment: hs;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--contact-dim);
  padding: 9px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .howto-steps li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .howto-steps li::before {
  content: counter(hs, decimal-leading-zero);
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  line-height: 1.8;
  letter-spacing: .08em;
  color: var(--c-lake);
  padding-top: 2px;
}

.page-contact .howto-steps li > span {
  flex: 1;
}

.page-contact .howto-steps b {
  font-weight: 700;
  color: var(--c-mist);
}

/* ---------- 受理范围 ---------- */
.page-contact .scope-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-contact .scope-col {
  border: 1px solid var(--line);
  border-top-width: 3px;
  border-radius: var(--r);
  background: var(--contact-panel);
  padding: var(--contact-card-pad);
}

.page-contact .scope-col.is-in {
  border-top-color: var(--c-lake);
}

.page-contact .scope-col.is-out {
  border-top-color: var(--c-coral);
}

.page-contact .scope-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--c-mist);
  margin: 0 0 14px;
}

.page-contact .scope-dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.page-contact .is-in .scope-dot {
  background: var(--c-volt);
  box-shadow: 0 0 0 4px rgba(111, 227, 210, .14);
}

.page-contact .is-out .scope-dot {
  background: var(--c-coral);
  box-shadow: 0 0 0 4px rgba(242, 112, 74, .14);
}

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

.page-contact .scope-list li {
  position: relative;
  padding: 10px 0 10px 18px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--contact-dim);
  border-top: 1px solid var(--line-soft);
}

.page-contact .scope-list li:first-child {
  border-top: 0;
}

.page-contact .scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 7px;
  height: 1px;
  background: var(--c-lake);
}

.page-contact .is-out .scope-list li::before {
  background: var(--c-coral);
}

/* ---------- 准备清单 ---------- */
.page-contact .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .check-item label {
  position: relative;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--contact-panel);
  cursor: pointer;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-contact .check-item label:hover {
  border-color: var(--line-strong);
}

.page-contact .check-item input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .check-box {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--c-night);
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .check-box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--c-night);
  border-bottom: 2px solid var(--c-night);
  transform: rotate(42deg) scale(0);
  transform-origin: center;
  transition: transform .18s var(--ease);
}

.page-contact .check-item input:checked + .check-box {
  background: var(--c-gold);
  border-color: var(--c-gold);
}

.page-contact .check-item input:checked + .check-box::after {
  transform: rotate(42deg) scale(1);
}

.page-contact .check-item input:focus-visible + .check-box {
  outline: 2px solid var(--c-lake);
  outline-offset: 2px;
}

.page-contact .check-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex: 1;
  min-width: 0;
}

.page-contact .check-text b {
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--c-mist);
  transition: color .18s var(--ease);
}

.page-contact .check-item input:checked ~ .check-text b {
  color: var(--c-volt);
}

.page-contact .check-text .muted {
  font-size: 13px;
  line-height: 1.8;
  max-width: none;
}

/* ---------- 备案与地区 ---------- */
.page-contact .region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
  align-items: center;
}

.page-contact .region-figure img {
  aspect-ratio: 4 / 3;
}

.page-contact .region-copy .section-title {
  margin-top: 12px;
}

.page-contact .region-facts {
  display: grid;
  gap: 1px;
  margin: 0 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--line-soft);
}

.page-contact .region-facts > div {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 11px 14px;
  background: var(--c-night);
}

.page-contact .region-facts dt {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--c-stone);
}

.page-contact .region-facts dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
  overflow-wrap: anywhere;
}

.page-contact .region-facts dd.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-gold);
  letter-spacing: .02em;
}

/* ---------- 下一步 ---------- */
.page-contact .next-bar {
  display: grid;
  gap: 18px;
  padding: var(--contact-card-pad);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-gold);
  border-radius: var(--r);
  background: linear-gradient(135deg, rgba(20, 42, 69, .92), rgba(11, 26, 46, .92));
}

.page-contact .next-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--contact-dim);
}

.page-contact .inline-link {
  color: var(--c-lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 182, 196, .36);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  color: var(--c-volt);
  border-bottom-color: var(--c-volt);
}

.page-contact .next-bar .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 印刷标签条 ---------- */
.page-contact .contact-stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(34px, 5vw, 58px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px dashed var(--line);
}

.page-contact .stamp-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--c-mist);
  background: var(--c-indigo);
  box-shadow: 3px 3px 0 0 var(--c-night-deep);
}

.page-contact .stamp-chip:last-child {
  color: var(--c-night);
  background: var(--c-paper);
  border-color: var(--c-paper);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-contact .howto-grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-contact .scope-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .next-bar {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 720px) {
  .page-contact .channel-cards {
    grid-template-columns: repeat(3, 1fr);
    padding-bottom: 42px;
  }

  .page-contact .channel-card:nth-child(2) {
    transform: translateY(20px);
  }

  .page-contact .channel-card:nth-child(3) {
    transform: translateY(38px);
  }
}

@media (min-width: 860px) {
  .page-contact .region-grid {
    grid-template-columns: 5fr 7fr;
  }
}

@media (max-width: 719px) {
  .page-contact .channel-card {
    box-shadow: 4px 4px 0 0 var(--c-night-deep), 4px 4px 0 1px var(--line), var(--shadow-card);
  }
}

@media (max-width: 420px) {
  .page-contact .region-facts > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-contact .channel-value {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .check-box,
  .page-contact .check-box::after,
  .page-contact .check-item label,
  .page-contact .inline-link {
    transition: none;
  }
}