.page-contact {
  --pc-hair: rgba(138, 153, 173, .22);
  --pc-hair-soft: rgba(138, 153, 173, .1);
  --pc-signal-glow: rgba(255, 122, 26, .16);
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-contact .breadcrumb {
  padding-top: clamp(.9rem, 3vw, 1.6rem);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--pc-hair-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--pc-hair-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 72% 82% at 28% 22%, #000 0%, transparent 76%);
  mask-image: radial-gradient(ellipse 72% 82% at 28% 22%, #000 0%, transparent 76%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: -14% -18% auto -18%;
  height: 360px;
  z-index: -1;
  background:
    radial-gradient(ellipse at 26% 0%, rgba(111, 182, 201, .16), transparent 66%),
    radial-gradient(ellipse at 78% 8%, rgba(255, 122, 26, .14), transparent 62%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: end;
}

.page-contact .contact-hero__copy h1 {
  margin: .65rem 0 1rem;
  max-width: 22ch;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

.page-contact .contact-hero__meta {
  margin: 1.25rem 0 0;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--orbit);
}

.page-contact .contact-hero__media,
.page-contact .contact-partner__media {
  margin: 0;
}

@media (min-width: 920px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: end;
  }
  .page-contact .contact-hero__copy {
    padding-bottom: .75rem;
  }
}

/* ---------- 联系渠道 ---------- */
.page-contact .channels__head {
  max-width: 48rem;
}

.page-contact .channel-grid {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact .channel {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 3.5vw, 1.75rem);
  background: linear-gradient(158deg, var(--panel) 0%, var(--midnight) 62%, var(--void) 100%);
  border: 1px solid var(--pc-hair);
  border-radius: var(--radius-lg);
  transition: border-color var(--seek) ease;
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  right: -34%;
  bottom: -58%;
  width: 210px;
  height: 210px;
  background: radial-gradient(circle, var(--pc-signal-glow), transparent 70%);
  pointer-events: none;
}

.page-contact .channel--primary {
  border-color: rgba(255, 122, 26, .38);
}

.page-contact .channel:hover {
  border-color: rgba(255, 122, 26, .55);
}

.page-contact .channel__node {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, .12);
}

.page-contact .channel:not(.channel--primary) .channel__node {
  background: var(--mist);
  box-shadow: 0 0 0 5px rgba(111, 182, 201, .14);
}

.page-contact .channel__index {
  margin: 0;
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--orbit);
  text-transform: uppercase;
}

.page-contact .channel h3 {
  margin: .75rem 0 .6rem;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  letter-spacing: -.01em;
  color: var(--silver);
}

.page-contact .channel .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  margin-bottom: .9rem;
}

.page-contact .channel .copy-value {
  flex: 1 1 12rem;
  min-width: 0;
  font-size: .875rem;
  line-height: 1.55;
  color: var(--signal-soft);
  word-break: break-all;
}

.page-contact .channel__note {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--orbit);
}

@media (min-width: 860px) {
  .page-contact .channel-grid {
    grid-template-columns: 1.35fr 1fr 1fr;
    gap: 1.25rem;
  }
}

/* ---------- 咨询流程 + 标题生成器 ---------- */
.page-contact .contact-flow__grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
  align-items: start;
}

.page-contact .contact-steps {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: .25rem;
}

.page-contact .contact-steps .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-top: 1px solid var(--pc-hair-soft);
}

.page-contact .contact-steps .step__num {
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--signal);
  padding-top: .2rem;
}

.page-contact .contact-steps h3 {
  margin: 0 0 .4rem;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  letter-spacing: -.01em;
  color: var(--silver);
}

.page-contact .contact-steps p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--orbit);
}

.page-contact .builder {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: clamp(1.25rem, 3.5vw, 1.75rem);
  background: var(--midnight);
  border: 1px solid var(--pc-hair);
  border-radius: var(--radius-lg);
}

.page-contact .builder::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(1.25rem, 3.5vw, 1.75rem);
  width: 52px;
  height: 2px;
  background: linear-gradient(90deg, var(--signal), transparent);
}

.page-contact .builder__title,
.page-contact .builder__intro,
.page-contact .builder__lines {
  flex: 0 0 100%;
  min-width: 0;
}

.page-contact .builder__title {
  margin: .35rem 0 .5rem;
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  letter-spacing: -.01em;
  color: var(--silver);
}

.page-contact .builder__intro {
  margin: 0 0 .75rem;
  font-size: .9375rem;
  line-height: 1.7;
}

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

.page-contact .builder__option {
  display: inline-flex;
  align-items: center;
  padding: .45rem .9rem;
  border: 1px solid var(--pc-hair);
  border-radius: 999px;
  background: rgba(19, 30, 51, .6);
  font-size: .875rem;
  color: var(--orbit);
  cursor: pointer;
  transition: color var(--seek) ease, background var(--seek) ease, border-color var(--seek) ease;
}

.page-contact .builder__option:hover {
  color: var(--silver);
  border-color: rgba(255, 122, 26, .45);
}

.page-contact .builder__radio:checked + .builder__option {
  color: #1A0E04;
  background: var(--signal);
  border-color: var(--signal);
  font-weight: 600;
}

.page-contact .builder__radio:focus-visible + .builder__option {
  outline: 2px solid var(--signal-soft);
  outline-offset: 2px;
}

.page-contact .builder__lines {
  margin-top: .75rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--pc-hair);
}

.page-contact .builder__line {
  display: none;
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--orbit);
}

.page-contact .builder__line .mono {
  display: block;
  margin-bottom: .35rem;
  font-size: .875rem;
  color: var(--signal-soft);
  word-break: break-all;
}

.page-contact .builder__line em {
  font-style: normal;
}

.page-contact #pc-topic-version:checked ~ .builder__lines .builder__line--version,
.page-contact #pc-topic-data:checked ~ .builder__lines .builder__line--data,
.page-contact #pc-topic-replay:checked ~ .builder__lines .builder__line--replay,
.page-contact #pc-topic-partner:checked ~ .builder__lines .builder__line--partner,
.page-contact #pc-topic-other:checked ~ .builder__lines .builder__line--other {
  display: block;
}

@media (min-width: 980px) {
  .page-contact .contact-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }
}

/* ---------- 服务时间 ---------- */
.page-contact .hours {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.5rem, 4vw, 2.25rem);
  background: linear-gradient(135deg, var(--midnight) 0%, var(--panel) 100%);
  border: 1px solid var(--pc-hair);
  border-radius: var(--radius-lg);
}

.page-contact .hours__intro h2 {
  margin: .6rem 0 .9rem;
}

.page-contact .hours__intro p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
}

.page-contact .hours__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-contact .hours__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .3rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--pc-hair-soft);
}

.page-contact .hours__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .hours__key {
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--signal);
}

.page-contact .hours__val {
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--silver);
}

@media (min-width: 560px) {
  .page-contact .hours__item {
    grid-template-columns: minmax(0, 9.5rem) minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-contact .hours {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: center;
  }
}

/* ---------- 合作与资料协助 ---------- */
.page-contact .contact-partner__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-contact .contact-partner__copy h2 {
  margin: .6rem 0 0;
}

.page-contact .partner-list {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-contact .partner-list li {
  padding: 1rem 1.15rem;
  background: rgba(19, 30, 51, .55);
  border-left: 2px solid var(--mist);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-contact .partner-list li:nth-child(2) {
  border-left-color: var(--signal);
}

.page-contact .partner-list li:nth-child(3) {
  border-left-color: var(--ok);
}

.page-contact .partner-list h3 {
  margin: 0 0 .4rem;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  letter-spacing: -.01em;
  color: var(--silver);
}

.page-contact .partner-list p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.72;
  color: var(--orbit);
}

@media (min-width: 900px) {
  .page-contact .contact-partner__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }
}

/* ---------- 常见咨询场景 ---------- */
.page-contact .scenes__head {
  max-width: 42rem;
}

.page-contact .qa-list {
  display: grid;
  gap: .75rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  max-width: 58rem;
}

.page-contact .qa {
  background: rgba(14, 22, 40, .72);
  border: 1px solid var(--pc-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-contact .qa[open] {
  border-color: rgba(255, 122, 26, .38);
}

.page-contact .qa__q {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: 1rem 1.15rem;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--silver);
}

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

.page-contact .qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--signal);
}

.page-contact .qa[open] .qa__q::after {
  content: "−";
}

.page-contact .qa__idx {
  flex: 0 0 auto;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--orbit);
}

.page-contact .qa__a {
  padding: 0 1.15rem 1.15rem;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--orbit);
}

.page-contact .qa__a p {
  margin: 0;
}

/* ---------- 快捷返回 ---------- */
.page-contact .return-panel {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  background:
    radial-gradient(circle at 88% 0%, rgba(255, 122, 26, .14), transparent 55%),
    var(--void);
  border: 1px solid var(--pc-hair);
  border-radius: var(--radius-lg);
}

.page-contact .return-panel__copy h2 {
  margin: .6rem 0 .8rem;
}

.page-contact .return-panel__copy p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
}

.page-contact .return-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-contact .return-link {
  display: inline-flex;
  align-items: center;
  padding: .5rem .95rem;
  border: 1px solid var(--pc-hair);
  border-radius: 999px;
  font-size: .875rem;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--seek) ease, border-color var(--seek) ease;
}

.page-contact .return-link:hover {
  color: var(--signal);
  border-color: var(--signal);
}

@media (min-width: 860px) {
  .page-contact .return-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, auto);
    align-items: center;
    gap: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .builder__option,
  .page-contact .return-link {
    transition: none;
  }
}