.page-contact {
  --ct-radius: var(--by-radius);
  display: block;
  color: var(--by-text);
  background: var(--by-ink);
}

.page-contact .by-crumbs {
  padding: clamp(1rem, 2.5vw, 1.5rem) 0 0;
}

.page-contact .by-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .82rem;
}

.page-contact .by-crumbs__sep {
  color: var(--by-edge);
}

.page-contact .by-crumbs__here {
  color: var(--by-muted);
}

.page-contact .by-band {
  margin-bottom: .9rem;
}

.page-contact .ct-h2 {
  font-family: var(--by-font-display);
  font-size: clamp(1.6rem, 3.6vw, 2.35rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .01em;
  margin: 0 0 .6rem;
}

.page-contact .ct-h3 {
  margin: 0 0 .55rem;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
}

.page-contact .ct-sub {
  margin: 0;
  max-width: 64ch;
  color: var(--by-muted);
  font-size: .95rem;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.2rem, 3.5vw, 2.4rem) 0 clamp(1.6rem, 4vw, 2.4rem);
  background:
    radial-gradient(760px 380px at 88% -22%, rgba(61, 245, 198, .16), transparent 62%),
    linear-gradient(180deg, var(--by-ink) 0%, var(--by-ink-deep) 100%);
  border-bottom: 1px solid var(--by-edge);
}

.page-contact .ct-hero__inner {
  position: relative;
}

.page-contact .ct-kicker {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin: 0 0 clamp(1rem, 2.5vw, 1.5rem);
  padding: .35rem .8rem;
  font-family: var(--by-font-mono);
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--by-neon);
  background: rgba(61, 245, 198, .08);
  border: 1px solid rgba(61, 245, 198, .28);
  border-radius: 999px;
}

.page-contact .ct-hero__title {
  margin: 0 0 1rem;
  max-width: 21ch;
  font-family: var(--by-font-display);
  font-size: clamp(2.05rem, 6.4vw, 3.9rem);
  font-weight: 700;
  line-height: 1.06;
}

.page-contact .ct-hero__title em {
  display: block;
  font-style: normal;
  color: var(--by-neon);
  text-shadow: 0 0 26px rgba(61, 245, 198, .32);
}

.page-contact .ct-hero__lead {
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  max-width: 60ch;
  color: var(--by-text);
  opacity: .88;
}

.page-contact .ct-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

.page-contact .ct-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--by-edge);
}

.page-contact .ct-fact {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .9rem 0;
  border-bottom: 1px solid var(--by-edge);
}

.page-contact .ct-fact:last-child {
  border-bottom: 0;
}

.page-contact .ct-fact__num {
  font-family: var(--by-font-mono);
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--by-neon);
  text-shadow: 0 0 16px rgba(61, 245, 198, .3);
  white-space: nowrap;
}

.page-contact .ct-fact__cap {
  color: var(--by-muted);
  font-size: .84rem;
}

/* ---------- 反馈类型切换 ---------- */
.page-contact .ct-types,
.page-contact .ct-prepare,
.page-contact .ct-process,
.page-contact .ct-cooperate {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
}

.page-contact .ct-prepare {
  background: linear-gradient(180deg, var(--by-ink) 0%, rgba(10, 31, 26, .92) 52%, var(--by-ink) 100%);
}

.page-contact .ct-process {
  background: var(--by-ink);
  border-top: 1px solid var(--by-edge);
}

.page-contact .ct-cooperate {
  background: linear-gradient(180deg, var(--by-ink) 0%, var(--by-ink-deep) 100%);
  border-top: 1px solid var(--by-edge);
}

.page-contact .ct-types__layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.6rem);
  margin-top: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-contact .ct-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  white-space: nowrap;
  clip-path: inset(50%);
}

.page-contact .ct-types__rail {
  display: flex;
  gap: .6rem;
  overflow-x: auto;
  padding-bottom: .35rem;
}

.page-contact .ct-type {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .65rem;
  min-width: 15rem;
  padding: .85rem .95rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: rgba(22, 58, 49, .55);
  cursor: pointer;
  transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

.page-contact .ct-type:hover {
  transform: translateY(-2px);
  border-color: rgba(61, 245, 198, .45);
}

.page-contact .ct-type__no {
  flex: 0 0 auto;
  padding: .15rem .42rem;
  font-family: var(--by-font-mono);
  font-size: .8rem;
  font-weight: 700;
  color: var(--by-ink);
  background: var(--by-neon);
  border-radius: .35rem;
}

.page-contact .ct-type__body {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  min-width: 0;
}

.page-contact .ct-type__name {
  font-size: .95rem;
  font-weight: 600;
}

.page-contact .ct-type__hint {
  color: var(--by-muted);
  font-size: .76rem;
}

.page-contact #ct-type-a:checked ~ .ct-types__rail label[for="ct-type-a"],
.page-contact #ct-type-b:checked ~ .ct-types__rail label[for="ct-type-b"],
.page-contact #ct-type-c:checked ~ .ct-types__rail label[for="ct-type-c"] {
  border-color: var(--by-neon);
  background: linear-gradient(140deg, rgba(61, 245, 198, .16), rgba(22, 58, 49, .9));
  box-shadow: 0 0 0 1px rgba(61, 245, 198, .3), 0 18px 34px -24px rgba(0, 0, 0, .9);
}

.page-contact #ct-type-a:focus-visible ~ .ct-types__rail label[for="ct-type-a"],
.page-contact #ct-type-b:focus-visible ~ .ct-types__rail label[for="ct-type-b"],
.page-contact #ct-type-c:focus-visible ~ .ct-types__rail label[for="ct-type-c"] {
  outline: 2px solid var(--by-neon);
  outline-offset: 3px;
}

.page-contact .ct-panel {
  display: none;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid var(--by-edge);
  border-left: 3px solid var(--by-neon);
  border-radius: var(--ct-radius);
  background: linear-gradient(160deg, rgba(22, 58, 49, .92), rgba(10, 31, 26, .94));
  box-shadow: var(--by-shadow);
}

.page-contact #ct-type-a:checked ~ .ct-types__panels .ct-panel[data-panel="a"],
.page-contact #ct-type-b:checked ~ .ct-types__panels .ct-panel[data-panel="b"],
.page-contact #ct-type-c:checked ~ .ct-types__panels .ct-panel[data-panel="c"] {
  display: block;
}

.page-contact .ct-panel__title {
  margin: 0 0 .6rem;
  font-family: var(--by-font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  font-weight: 700;
  line-height: 1.2;
}

.page-contact .ct-panel__lead {
  margin: 0 0 .9rem;
  color: var(--by-text);
  opacity: .88;
}

.page-contact .ct-panel__list {
  display: grid;
  gap: .55rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.page-contact .ct-panel__list li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--by-muted);
  font-size: .9rem;
}

.page-contact .ct-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: .45rem;
  height: .45rem;
  background: var(--by-neon);
  border-radius: 1px;
  box-shadow: 0 0 10px rgba(61, 245, 198, .5);
}

.page-contact .ct-panel__foot {
  margin: 0;
  padding-top: .9rem;
  border-top: 1px dashed rgba(31, 74, 63, .9);
  color: var(--by-text);
  font-size: .88rem;
}

.page-contact .ct-panel__foot a {
  color: var(--by-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 245, 198, .45);
}

.page-contact .ct-panel__foot a:hover {
  border-bottom-color: var(--by-neon);
}

/* ---------- 图片 ---------- */
.page-contact .ct-figure {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
}

.page-contact .ct-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: var(--by-ink-deep);
}

.page-contact .ct-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .ct-figure--wide .ct-media img {
  aspect-ratio: 14 / 9;
}

.page-contact .ct-figure__cap {
  margin: .7rem 0 0;
  color: var(--by-muted);
  font-size: .82rem;
  line-height: 1.6;
}

/* ---------- 栅格保护 ---------- */
.page-contact .by-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.6rem);
}

/* ---------- 02 信息准备 ---------- */
.page-contact .ct-prepare__main,
.page-contact .ct-prepare__side {
  min-width: 0;
}

.page-contact .ct-sheet {
  margin-top: 1.2rem;
  padding: clamp(1rem, 2.6vw, 1.5rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: linear-gradient(180deg, rgba(22, 58, 49, .72), rgba(10, 31, 26, .88));
  box-shadow: var(--by-shadow);
}

.page-contact .ct-sheet__head {
  margin: 0 0 .4rem;
  font-family: var(--by-font-mono);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--by-neon);
}

.page-contact .ct-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .2rem;
  padding: .8rem .5rem .8rem .7rem;
  border-bottom: 1px dashed rgba(31, 74, 63, .9);
  border-left: 2px solid transparent;
  transition: background .2s ease, border-left-color .2s ease;
}

.page-contact .ct-field:last-child {
  border-bottom: 0;
}

.page-contact .ct-field:hover {
  background: rgba(61, 245, 198, .06);
  border-left-color: var(--by-neon);
}

.page-contact .ct-field__key {
  font-family: var(--by-font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--by-muted);
}

.page-contact .ct-field__val {
  color: var(--by-text);
  font-size: .92rem;
}

.page-contact .ct-prepare__side {
  align-self: start;
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: radial-gradient(280px 180px at 100% 0%, rgba(61, 245, 198, .1), transparent 70%), rgba(22, 58, 49, .45);
}

.page-contact .ct-tips {
  display: grid;
  gap: .6rem;
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.page-contact .ct-tips li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--by-muted);
  font-size: .88rem;
}

.page-contact .ct-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: .55rem;
  height: 2px;
  background: var(--by-neon);
}

.page-contact .ct-inline-link {
  display: inline-block;
  padding-bottom: 1px;
  font-size: .86rem;
  color: var(--by-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 245, 198, .45);
}

.page-contact .ct-inline-link:hover {
  border-bottom-color: var(--by-neon);
}

/* ---------- 03 处理流程 ---------- */
.page-contact .ct-steps {
  display: grid;
  gap: clamp(.9rem, 2.2vw, 1.2rem);
  margin: clamp(1.4rem, 3.5vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .9rem;
  padding: clamp(1rem, 2.4vw, 1.4rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: rgba(22, 58, 49, .5);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.page-contact .ct-step:hover {
  transform: translateY(-2px);
  border-color: rgba(61, 245, 198, .4);
  background: rgba(22, 58, 49, .78);
}

.page-contact .ct-step__no {
  font-family: var(--by-font-mono);
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--by-neon);
  text-shadow: 0 0 14px rgba(61, 245, 198, .35);
}

.page-contact .ct-step__body {
  min-width: 0;
}

.page-contact .ct-step__body p {
  margin: 0;
  color: var(--by-muted);
  font-size: .9rem;
}

/* ---------- 04 联系渠道 ---------- */
.page-contact .ct-channel {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
  background:
    radial-gradient(880px 400px at 12% -10%, rgba(61, 245, 198, .09), transparent 62%),
    var(--by-ink-deep);
  border-top: 1px solid var(--by-edge);
  border-bottom: 1px solid var(--by-edge);
}

.page-contact .ct-plate {
  min-width: 0;
  padding: clamp(1.1rem, 2.8vw, 1.7rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: linear-gradient(165deg, rgba(22, 58, 49, .94), rgba(10, 31, 26, .96));
  box-shadow: var(--by-shadow);
}

.page-contact .ct-plate__row {
  display: grid;
  gap: .25rem;
  padding: .9rem 0;
  border-bottom: 1px solid rgba(31, 74, 63, .8);
}

.page-contact .ct-plate__row:first-child {
  padding-top: 0;
}

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

.page-contact .ct-plate__key {
  font-family: var(--by-font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--by-muted);
}

.page-contact .ct-plate__val {
  color: var(--by-text);
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.page-contact .ct-plate__val--mono {
  font-family: var(--by-font-mono);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--by-neon);
  text-shadow: 0 0 14px rgba(61, 245, 198, .26);
}

.page-contact .ct-plate__note {
  color: var(--by-muted);
  font-size: .82rem;
  line-height: 1.6;
}

.page-contact .ct-slot {
  min-width: 0;
  align-self: start;
  padding: clamp(1.1rem, 2.8vw, 1.6rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: rgba(22, 58, 49, .42);
}

.page-contact .ct-slot p {
  margin: 0 0 .7rem;
  color: var(--by-muted);
  font-size: .88rem;
}

.page-contact .ct-slot p:last-child {
  margin-bottom: 0;
}

.page-contact .ct-slot .ct-slot__big {
  margin-bottom: .8rem;
  font-family: var(--by-font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--by-neon);
}

/* ---------- 05 收录合作 ---------- */
.page-contact .ct-card {
  min-width: 0;
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: rgba(22, 58, 49, .45);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.page-contact .ct-card:hover {
  transform: translateY(-3px);
  border-color: rgba(61, 245, 198, .4);
  background: rgba(22, 58, 49, .72);
}

.page-contact .ct-card .ct-h3 {
  margin-top: .7rem;
}

.page-contact .ct-card p {
  margin: 0;
  color: var(--by-muted);
  font-size: .9rem;
}

.page-contact .ct-cooperate__note {
  margin: clamp(1.4rem, 3.5vw, 2rem) 0 0;
  padding: clamp(1rem, 2.6vw, 1.4rem);
  border-left: 3px solid var(--by-neon);
  border-radius: 0 var(--ct-radius) var(--ct-radius) 0;
  background: rgba(22, 58, 49, .45);
  color: var(--by-text);
  font-size: .92rem;
}

/* ---------- 相关入口 ---------- */
.page-contact .ct-more {
  padding: clamp(2.4rem, 6vw, 4rem) 0 clamp(2.6rem, 6vw, 4.4rem);
  background: linear-gradient(180deg, var(--by-ink-deep) 0%, var(--by-ink) 100%);
}

.page-contact .ct-more__title {
  margin-bottom: 1.2rem;
}

.page-contact .ct-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-link {
  display: grid;
  gap: .2rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--ct-radius);
  background: rgba(22, 58, 49, .42);
  color: var(--by-text);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.page-contact .ct-link:hover {
  transform: translateY(-2px);
  border-color: rgba(61, 245, 198, .45);
  background: rgba(22, 58, 49, .74);
}

.page-contact .ct-link:focus-visible {
  outline: 2px solid var(--by-neon);
  outline-offset: 3px;
}

.page-contact .ct-link__name {
  font-weight: 600;
}

.page-contact .ct-link__name::after {
  content: " →";
  color: var(--by-neon);
}

.page-contact .ct-link__desc {
  color: var(--by-muted);
  font-size: .84rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .ct-field {
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-contact .ct-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .ct-fact {
    padding: 1.1rem 1.2rem;
    border-bottom: 0;
    border-left: 1px solid var(--by-edge);
  }

  .page-contact .ct-fact:first-child {
    padding-left: 0;
    border-left: 0;
  }

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

@media (min-width: 900px) {
  .page-contact .ct-types__layout {
    grid-template-columns: minmax(0, 262px) minmax(0, 1fr);
    align-items: start;
    gap: clamp(1.4rem, 3vw, 2.4rem);
  }

  .page-contact .ct-types__rail {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-contact .ct-type {
    width: 100%;
    min-width: 0;
  }

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

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

  .page-contact .by-grid--8-4 {
    grid-template-columns: 8fr 4fr;
  }

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

@media (min-width: 1080px) {
  .page-contact .ct-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-type,
  .page-contact .ct-step,
  .page-contact .ct-card,
  .page-contact .ct-link,
  .page-contact .ct-field {
    transition: none;
  }

  .page-contact .ct-type:hover,
  .page-contact .ct-step:hover,
  .page-contact .ct-card:hover,
  .page-contact .ct-link:hover {
    transform: none;
  }
}