.page-contact .breadcrumb {
  padding: 28px 0 0;
}

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}

.page-contact .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line-strong);
}

.page-contact .breadcrumb-item a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .breadcrumb-item a:hover,
.page-contact .breadcrumb-item a:focus-visible {
  color: var(--blue);
  border-bottom-color: var(--blue);
}

.page-contact .breadcrumb-item.is-current {
  color: var(--cream);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero-section {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 5.5vw, 68px) 0 clamp(42px, 6.5vw, 84px);
}

.page-contact .contact-hero-section::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -18%;
  width: 52%;
  height: 138%;
  background: linear-gradient(158deg, rgba(255, 90, 54, .18), rgba(45, 155, 240, .06) 60%, transparent 88%);
  clip-path: polygon(22% 0, 100% 0, 78% 100%, 0 100%);
  pointer-events: none;
}

.page-contact .contact-hero {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 20px;
  font-size: clamp(32px, 6.8vw, 62px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--cream);
}

.page-contact .contact-hero-lead {
  margin: 0 0 26px;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .contact-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .contact-hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: center;
  }
}

/* ---------- 区块节奏 ---------- */

.page-contact .contact-block {
  padding: clamp(42px, 6vw, 78px) 0;
}

.page-contact .block-head {
  max-width: 74ch;
  margin-bottom: clamp(26px, 3.6vw, 42px);
}

.page-contact .block-head .section-title,
.page-contact .check-head .section-title,
.page-contact .rhythm-head .section-title {
  margin: 10px 0 12px;
}

.page-contact .block-head .section-lead,
.page-contact .check-head .section-lead,
.page-contact .rhythm-head .section-lead,
.page-contact .collab-main .section-title {
  margin: 0;
}

/* ---------- 三条通道 ---------- */

.page-contact .channel-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

@media (min-width: 780px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 30px 24px 24px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--blue);
  background: #191310;
}

.page-contact .channel-band {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
}

.page-contact .channel-card--mail .channel-band { background: var(--orange); }
.page-contact .channel-card--phone .channel-band { background: var(--blue); }
.page-contact .channel-card--collab .channel-band { background: var(--spring-green); }

.page-contact .channel-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--silver);
}

.page-contact .channel-name {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 800;
  line-height: 1.14;
  color: var(--cream);
}

.page-contact .channel-desc {
  flex: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--silver);
}

.page-contact .channel-value {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  background: rgba(246, 226, 122, .06);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--spring-yellow);
  word-break: break-all;
}

.page-contact .channel-details {
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}

.page-contact .channel-details summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  list-style: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--ice);
  transition: color 180ms var(--ease);
}

.page-contact .channel-details summary::-webkit-details-marker {
  display: none;
}

.page-contact .channel-details summary::before {
  content: "+";
  display: inline-block;
  width: 12px;
  font-family: var(--font-mono);
  color: var(--blue);
}

.page-contact .channel-details[open] summary::before {
  content: "–";
}

.page-contact .channel-details summary:hover,
.page-contact .channel-details summary:focus-visible {
  color: var(--blue);
}

.page-contact .channel-list {
  display: grid;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.page-contact .channel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--line-strong);
}

/* ---------- 自查清单 ---------- */

.page-contact .check-split {
  display: grid;
  gap: 30px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-contact .check-split {
    grid-template-columns: 5fr 7fr;
    gap: 56px;
    align-items: start;
  }
}

.page-contact .check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  counter-reset: none;
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .check-box {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line-strong);
}

.page-contact .check-box::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 4px;
  width: 9px;
  height: 4px;
  border-left: 1.5px solid var(--spring-green);
  border-bottom: 1.5px solid var(--spring-green);
  transform: rotate(-45deg);
}

.page-contact .check-title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}

.page-contact .check-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--silver);
}

/* ---------- 四步流程 ---------- */

.page-contact .process-split {
  display: grid;
  gap: 34px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-contact .process-split {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }
}

.page-contact .flow-list {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow-list::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 54px;
  bottom: 54px;
  width: 1px;
  background: var(--line);
}

.page-contact .flow-item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 22px;
  padding-bottom: 30px;
}

.page-contact .flow-item:last-child {
  padding-bottom: 0;
}

.page-contact .flow-index {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid var(--line-strong);
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 17px;
  font-variant-numeric: tabular-nums;
  color: var(--ice);
}

.page-contact .flow-body {
  padding-top: 4px;
}

.page-contact .flow-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  color: var(--cream);
}

.page-contact .flow-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .process-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

/* ---------- 响应节奏 ---------- */

.page-contact .rhythm-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .rhythm-panel::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -40%;
  width: 40%;
  height: 140%;
  background: linear-gradient(180deg, transparent, rgba(224, 161, 0, .1));
  clip-path: polygon(30% 0, 100% 0, 70% 100%, 0 100%);
  pointer-events: none;
}

.page-contact .rhythm-head {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  margin-bottom: 30px;
}

.page-contact .rhythm-stats {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .page-contact .rhythm-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .rhythm-stat {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, .02);
}

.page-contact .rhythm-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 7.6vw, 74px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--spring-yellow);
}

.page-contact .rhythm-num span {
  margin-left: 8px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--silver);
}

.page-contact .rhythm-label {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--silver);
}

.page-contact .rhythm-note {
  position: relative;
  z-index: 1;
  max-width: 72ch;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.76;
  color: var(--silver);
}

/* ---------- 内容建议与合作 ---------- */

.page-contact .collab-grid {
  display: grid;
  gap: 30px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-contact .collab-grid {
    grid-template-columns: 8fr 4fr;
    gap: 56px;
    align-items: start;
  }
}

.page-contact .collab-main .section-title {
  margin: 10px 0 16px;
}

.page-contact .collab-main > p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--silver);
}

.page-contact .inline-link {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 180ms var(--ease);
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  color: var(--orange-soft);
}

.page-contact .collab-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .collab-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .collab-list strong {
  font-weight: 700;
  color: var(--cream);
}

.page-contact .collab-aside {
  position: relative;
  padding: 28px 24px 24px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .collab-aside::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--amber);
}

.page-contact .collab-criteria {
  display: grid;
  gap: 14px;
  margin: 16px 0 20px;
  padding: 0;
  list-style: none;
}

.page-contact .collab-criteria li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--cream);
}

.page-contact .collab-criteria li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 10px;
  height: 1px;
  background: var(--amber);
}

.page-contact .collab-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.72;
  color: var(--silver);
  word-break: break-word;
}

/* ---------- 页尾联系条 ---------- */

.page-contact .contact-tail {
  padding-bottom: clamp(52px, 7vw, 92px);
}

.page-contact .tail-panel {
  position: relative;
  display: grid;
  gap: 26px;
  grid-template-columns: 1fr;
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-contact .tail-panel::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--spring-green) 0 22%,
    var(--spring-yellow) 22% 44%,
    var(--orange) 44% 66%,
    var(--blue) 66% 84%,
    var(--ice) 84% 100%);
}

@media (min-width: 860px) {
  .page-contact .tail-panel {
    grid-template-columns: 7fr 5fr;
    gap: 40px;
    align-items: center;
  }
}

.page-contact .tail-title {
  margin: 10px 0 14px;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--cream);
}

.page-contact .tail-line {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--silver);
  word-break: break-word;
}

.page-contact .tail-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .tail-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  color: var(--cream);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-contact .tail-link:hover,
.page-contact .tail-link:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(45, 155, 240, .08);
}

/* ---------- 焦点可见性 ---------- */

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .tail-link,
  .page-contact .inline-link,
  .page-contact .channel-details summary {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within {
    transform: none;
  }
}