.page-contact {
  margin-top: calc(var(--rb-header-space) * -1);
  background: var(--rb-black);
  color: var(--rb-ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--rb-header-space) + clamp(30px, 6vw, 68px)) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(210, 32, 47, 0.3), transparent 62%),
    radial-gradient(90% 80% at -6% 104%, rgba(46, 125, 255, 0.18), transparent 64%),
    var(--rb-black);
  border-bottom: 1px solid var(--rb-line);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(243, 245, 247, 0.035) 0 1px, transparent 1px 4px);
  opacity: 0.7;
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  grid-template-columns: 1fr;
  align-items: center;
}

.page-contact .contact-hero__crumb {
  margin-bottom: 18px;
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 12px;
}

.page-contact .contact-hero__title {
  margin: 0 0 20px;
}

.page-contact .contact-hero__title span {
  color: var(--rb-red);
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 34em;
  color: var(--rb-ink-soft);
}

.page-contact .contact-hero__stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin: 28px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--rb-line);
}

.page-contact .contact-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-contact .contact-hero__stats .rb-num {
  font-family: var(--rb-font-mono);
  font-size: 1.5rem;
  color: var(--rb-yellow);
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.page-contact .contact-hero__stats li span:last-child {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--rb-ink-dim);
}

.page-contact .contact-hero__media {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-contact .contact-hero__frame {
  position: relative;
  border: 1px solid var(--rb-line);
  background: linear-gradient(140deg, var(--rb-panel), var(--rb-indigo));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--rb-cut)), calc(100% - var(--rb-cut)) 100%, 0 100%);
  overflow: hidden;
}

.page-contact .contact-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: contrast(1.08) saturate(1.05);
}

.page-contact .contact-hero__media figcaption {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--rb-ink-dim);
  letter-spacing: 0.02em;
  border-left: 2px solid var(--rb-yellow);
  padding-left: 12px;
}

/* ---------- 清单与渠道主体 ---------- */

.page-contact .contact-body {
  padding: clamp(48px, 8vw, 100px) 0;
  background:
    linear-gradient(180deg, var(--rb-black) 0%, #0c1015 55%, var(--rb-black) 100%);
}

.page-contact .contact-body__grid {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-contact .contact-check__title {
  margin: 10px 0 14px;
}

.page-contact .contact-check__intro {
  margin: 0;
  max-width: 42em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--rb-ink-soft);
}

.page-contact .contact-check__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-contact .contact-check__item {
  display: grid;
  grid-template-columns: 18px 30px 1fr;
  gap: 12px;
  align-items: start;
  padding: 18px 20px;
  background: var(--rb-panel);
  border-left: 3px solid var(--rb-line);
  transition: border-color var(--rb-dur) var(--rb-ease),
    transform var(--rb-dur) var(--rb-ease),
    background var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-check__item:hover {
  border-left-color: var(--rb-red);
  background: #171c26;
  transform: translateX(3px);
}

.page-contact .contact-check__box {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1.5px solid var(--rb-gray);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  transition: border-color var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-check__box::after {
  content: "";
  position: absolute;
  inset: 4px;
  background: var(--rb-blue);
  opacity: 0;
  transition: opacity var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-check__item:hover .contact-check__box {
  border-color: var(--rb-yellow);
}

.page-contact .contact-check__item:hover .contact-check__box::after {
  opacity: 1;
}

.page-contact .contact-check__no {
  font-family: var(--rb-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--rb-red);
  padding-top: 5px;
}

.page-contact .contact-check__label {
  margin: 0 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--rb-ink);
}

.page-contact .contact-check__content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--rb-ink-soft);
}

/* ---------- 渠道栏 ---------- */

.page-contact .contact-channels__title {
  margin: 0 0 10px;
}

.page-contact .contact-channels__note {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--rb-ink-dim);
}

.page-contact .contact-channels__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-contact .contact-channel {
  position: relative;
  padding: 24px 22px;
  background: linear-gradient(160deg, var(--rb-panel), #0d1016);
  border: 1px solid var(--rb-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--rb-cut)), calc(100% - var(--rb-cut)) 100%, 0 100%);
  transition: transform var(--rb-dur) var(--rb-ease), border-color var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-channel:hover {
  transform: translateY(-4px);
  border-color: var(--rb-line-strong);
}

.page-contact .contact-channels__list > li + li::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 1px;
  background: repeating-linear-gradient(105deg, var(--rb-line) 0 9px, transparent 9px 19px);
}

.page-contact .contact-channel__label {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--rb-yellow);
}

.page-contact .contact-channel__value {
  margin: 0;
  font-size: clamp(1rem, 2.6vw, 1.125rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--rb-ink);
  letter-spacing: 0.01em;
  word-break: break-word;
}

.page-contact .contact-channel__value--mono {
  font-family: var(--rb-font-mono);
  letter-spacing: 0.02em;
}

.page-contact .contact-channel__note {
  margin: 10px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--rb-ink-soft);
}

.page-contact .contact-channel__copy {
  margin-top: 14px;
  appearance: none;
  background: transparent;
  border: 1px solid var(--rb-blue);
  color: var(--rb-blue);
  font: inherit;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  padding: 7px 16px;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 82% 100%, 0 100%);
  transition: background var(--rb-dur) var(--rb-ease), color var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-channel__copy:hover {
  background: var(--rb-blue);
  color: var(--rb-black);
}

.page-contact .contact-channel__copy:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--rb-yellow);
}

.page-contact .contact-record {
  margin-top: 24px;
  padding: 24px 22px;
  background: var(--rb-teal);
  border-left: 3px solid var(--rb-yellow);
}

.page-contact .contact-record__label {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--rb-yellow);
}

.page-contact .contact-record__no {
  margin: 0;
  font-family: var(--rb-font-mono);
  font-size: 1.0625rem;
  letter-spacing: 0.04em;
  color: var(--rb-white);
}

.page-contact .contact-record__text {
  margin: 12px 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(243, 245, 247, 0.82);
}

.page-contact .contact-record__text a {
  color: var(--rb-yellow);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问题类型分段 ---------- */

.page-contact .contact-topics {
  padding: clamp(48px, 8vw, 100px) 0;
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(210, 32, 47, 0.2), transparent 60%),
    var(--rb-indigo);
  border-top: 1px solid var(--rb-line);
  border-bottom: 1px solid var(--rb-line);
}

.page-contact .contact-topics__head {
  max-width: 46em;
}

.page-contact .contact-topics__head .rb-title {
  margin: 10px 0 14px;
}

.page-contact .contact-topics__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--rb-ink-soft);
}

.page-contact .contact-topics__tabs {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .contact-topics__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-contact .contact-topics__list .rb-tab {
  flex: 0 0 auto;
  white-space: nowrap;
}

.page-contact .contact-topic {
  display: grid;
  gap: 26px;
  grid-template-columns: 1fr;
  margin-top: 22px;
  padding: clamp(24px, 4vw, 40px);
  background: var(--rb-panel);
  border: 1px solid var(--rb-line);
  border-top: 3px solid var(--rb-red);
}

.page-contact .contact-topic__body {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .contact-topic__title {
  margin: 0;
  font-size: clamp(1.25rem, 2.6vw, 1.625rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--rb-ink);
}

.page-contact .contact-topic__text {
  margin: 0;
  font-size: 0.9688rem;
  line-height: 1.78;
  color: var(--rb-ink-soft);
}

.page-contact .contact-topic__points {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .contact-topic__points li {
  position: relative;
  padding-left: 22px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--rb-ink);
}

.page-contact .contact-topic__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 11px;
  height: 2px;
  background: var(--rb-yellow);
}

.page-contact .contact-topic__points .rb-num {
  font-family: var(--rb-font-mono);
  color: var(--rb-yellow);
  letter-spacing: 0.02em;
}

.page-contact .contact-topic__aside {
  align-self: start;
  padding: 22px;
  background: rgba(10, 11, 13, 0.6);
  border-left: 3px solid var(--rb-blue);
}

.page-contact .contact-topic__aside-label {
  margin: 0 0 10px;
  font-family: var(--rb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--rb-blue);
}

.page-contact .contact-topic__aside-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--rb-ink-soft);
}

.page-contact .contact-topic__aside-text a {
  color: var(--rb-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 时效与顺序 ---------- */

.page-contact .contact-reply {
  padding: clamp(48px, 8vw, 100px) 0 0;
  background: var(--rb-black);
}

.page-contact .contact-reply__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-contact .contact-reply__intro .rb-title {
  margin: 10px 0 16px;
}

.page-contact .contact-reply__lead {
  margin: 0;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--rb-ink-soft);
}

.page-contact .contact-reply__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-contact .contact-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--rb-line);
  transition: padding-left var(--rb-dur) var(--rb-ease);
}

.page-contact .contact-step:last-child {
  border-bottom: 1px solid var(--rb-line);
}

.page-contact .contact-step:hover {
  padding-left: 8px;
}

.page-contact .contact-step__no {
  font-family: var(--rb-font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--rb-yellow);
  padding-top: 4px;
}

.page-contact .contact-step__body h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--rb-ink);
}

.page-contact .contact-step__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--rb-ink-soft);
}

.page-contact .contact-reply__strip {
  position: relative;
  margin-top: clamp(40px, 6vw, 76px);
}

.page-contact .contact-reply__strip::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 11, 13, 0.72) 0%, rgba(10, 11, 13, 0.25) 45%, rgba(10, 11, 13, 0.85) 100%);
  pointer-events: none;
}

.page-contact .contact-reply__strip img {
  display: block;
  width: 100%;
  height: clamp(150px, 26vw, 300px);
  object-fit: cover;
  opacity: 0.85;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-contact .contact-hero__stats {
    gap: 14px 44px;
  }

  .page-contact .contact-topic {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(40px, 5vw, 72px);
  }

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

  .page-contact .contact-channels {
    position: sticky;
    top: calc(var(--rb-header-space) + 28px);
  }

  .page-contact .contact-reply__grid {
    grid-template-columns: 4fr 8fr;
    gap: clamp(40px, 5vw, 72px);
  }

  .page-contact .contact-check__item {
    padding: 20px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-check__item,
  .page-contact .contact-channel,
  .page-contact .contact-step,
  .page-contact .contact-channel__copy,
  .page-contact .contact-check__box,
  .page-contact .contact-check__box::after {
    transition-duration: 120ms;
  }

  .page-contact .contact-check__item:hover,
  .page-contact .contact-channel:hover,
  .page-contact .contact-step:hover {
    transform: none;
    padding-left: 20px;
  }
}