.page-contact {
  --ct-pad: clamp(18px, 3.6vw, 28px);
  position: relative;
  overflow-x: clip;
  padding: clamp(22px, 4.5vw, 52px) 0 clamp(64px, 9vw, 120px);
  isolation: isolate;
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 540px;
  background-image:
    linear-gradient(to right, rgba(36, 48, 79, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 48, 79, 0.55) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse at 28% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at 28% 0%, #000 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-contact > .fs-wrap {
  position: relative;
  z-index: 1;
}

/* ---------- 面包屑 ---------- */
.page-contact .ct-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3.4vw, 32px);
  font-family: var(--f6-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--f6-mist);
}

.page-contact .ct-crumbs a {
  color: var(--f6-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--f6-ease), border-color 0.2s var(--f6-ease);
}

.page-contact .ct-crumbs a:hover {
  color: var(--f6-blue);
  border-bottom-color: var(--f6-blue);
}

/* ---------- 首屏声明 ---------- */
.page-contact .ct-head {
  position: relative;
  isolation: isolate;
  max-width: 880px;
}

.page-contact .ct-head::after {
  content: "";
  position: absolute;
  top: -38%;
  right: -12%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 26, 0.2), transparent 68%);
  pointer-events: none;
  z-index: -1;
}

.page-contact .ct-h1 {
  margin: 10px 0 0;
  font-family: var(--f6-display);
  font-size: clamp(2.1rem, 7.2vw, 4.1rem);
  line-height: 1.12;
  letter-spacing: 0.008em;
  color: var(--f6-white);
}

.page-contact .ct-h1__mark {
  background: linear-gradient(100deg, var(--f6-orange) 0%, var(--f6-cherry) 52%, var(--f6-grape) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-contact .ct-lead {
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--f6-mist);
}

/* ---------- 通用小标题 ---------- */
.page-contact .ct-h2 {
  margin: 0;
  font-family: var(--f6-display);
  font-size: clamp(1.5rem, 4.2vw, 2.25rem);
  line-height: 1.26;
  letter-spacing: 0.01em;
  color: var(--f6-white);
}

.page-contact .ct-note {
  margin: 12px 0 22px;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--f6-mist);
}

/* ---------- 联系渠道板 ---------- */
.page-contact .ct-board {
  margin-top: clamp(34px, 5.6vw, 64px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

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

.page-contact .ct-channel {
  position: relative;
  margin-bottom: 14px;
  padding: var(--ct-pad);
  border-radius: var(--f6-r-lg);
  border: 1px solid var(--f6-line);
  background: linear-gradient(155deg, rgba(18, 26, 51, 0.96), rgba(10, 13, 28, 0.92));
}

.page-contact .ct-channel--mail {
  border-color: rgba(255, 122, 26, 0.42);
  box-shadow: 0 26px 70px -52px rgba(255, 122, 26, 0.95);
}

.page-contact .ct-channel--tel {
  border-color: rgba(47, 211, 255, 0.3);
}

.page-contact .ct-channel--addr {
  border-color: rgba(36, 48, 79, 0.95);
}

.page-contact .ct-channel__tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: var(--f6-pill);
  border: 1px solid var(--f6-line);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--f6-mist);
}

.page-contact .ct-channel__value {
  margin: 14px 0 10px;
  font-size: clamp(1.02rem, 4.3vw, 1.72rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--f6-white);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .ct-channel--mail .ct-channel__value {
  color: var(--f6-orange);
}

.page-contact .ct-channel--tel .ct-channel__value {
  color: var(--f6-blue);
}

.page-contact .ct-channel__value--sm {
  font-family: var(--f6-body);
  font-size: clamp(0.95rem, 3.3vw, 1.1rem);
  letter-spacing: 0;
  color: var(--f6-white);
}

.page-contact .ct-channel__desc {
  margin: 0 0 16px;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--f6-mist);
}

.page-contact .ct-channel__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .ct-channel__acts .fs-btn,
.page-contact .ct-collab__cta {
  text-decoration: none;
  max-width: 100%;
}

.page-contact .ct-board__fig {
  position: relative;
  margin: 0;
  border-radius: var(--f6-r-lg);
  border: 1px solid var(--f6-line);
  overflow: hidden;
  background: var(--f6-panel);
}

.page-contact .ct-board__fig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1000 / 650;
  object-fit: cover;
}

.page-contact .ct-board__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 4px 12px;
  border-radius: var(--f6-pill);
  background: rgba(10, 13, 28, 0.76);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--f6-lime);
}

/* ---------- 咨询准备 ---------- */
.page-contact .ct-prep {
  margin-top: clamp(46px, 8vw, 92px);
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

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

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

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

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

.page-contact .ct-check__label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 16px;
  border-radius: 16px;
  border: 1px solid var(--f6-line);
  background: rgba(18, 26, 51, 0.55);
  cursor: pointer;
  transition: border-color 0.2s var(--f6-ease), background 0.2s var(--f6-ease);
}

.page-contact .ct-check__label:hover {
  border-color: rgba(184, 255, 61, 0.5);
}

.page-contact .ct-check__tick {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border-radius: 6px;
  border: 1px solid var(--f6-line);
  display: grid;
  place-items: center;
  transition: background 0.18s var(--f6-ease), border-color 0.18s var(--f6-ease);
}

.page-contact .ct-check__box:checked + .ct-check__label {
  border-color: rgba(184, 255, 61, 0.72);
  background: rgba(184, 255, 61, 0.07);
}

.page-contact .ct-check__box:checked + .ct-check__label .ct-check__tick {
  background: var(--f6-lime);
  border-color: var(--f6-lime);
}

.page-contact .ct-check__box:checked + .ct-check__label .ct-check__tick::after {
  content: "✓";
  font-size: 13px;
  line-height: 1;
  color: var(--f6-ink);
}

.page-contact .ct-check__box:focus-visible + .ct-check__label {
  outline: 2px solid var(--f6-blue);
  outline-offset: 2px;
}

.page-contact .ct-check__num {
  flex: 0 0 auto;
  margin-top: 2px;
  font-family: var(--f6-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--f6-orange);
}

.page-contact .ct-check__text {
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--f6-mist);
  overflow-wrap: anywhere;
}

.page-contact .ct-check__text strong {
  color: var(--f6-white);
  font-weight: 600;
}

.page-contact .ct-tip {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--f6-orange);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--f6-mist);
}

.page-contact .ct-prep__fig {
  margin: 0;
  border-radius: var(--f6-r-lg);
  border: 1px solid var(--f6-line);
  overflow: hidden;
  box-shadow: 0 34px 80px -58px rgba(139, 92, 246, 0.95);
}

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

/* ---------- 回复节奏 ---------- */
.page-contact .ct-flow {
  margin-top: clamp(46px, 8vw, 92px);
}

.page-contact .ct-flow__grid {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.page-contact .ct-flow__item {
  padding: clamp(18px, 2.6vw, 26px);
  border-radius: var(--f6-r-md);
  border: 1px solid var(--f6-line);
  background:
    radial-gradient(120% 110% at 0% 0%, rgba(47, 211, 255, 0.12), transparent 62%),
    var(--f6-panel);
}

.page-contact .ct-flow__item:nth-child(2) {
  background:
    radial-gradient(120% 110% at 0% 0%, rgba(184, 255, 61, 0.11), transparent 62%),
    var(--f6-panel);
}

.page-contact .ct-flow__item:nth-child(3) {
  background:
    radial-gradient(120% 110% at 0% 0%, rgba(139, 92, 246, 0.16), transparent 62%),
    var(--f6-panel);
}

.page-contact .ct-flow__num {
  margin: 0 0 10px;
  font-family: var(--f6-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--f6-lime);
}

.page-contact .ct-flow__item h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--f6-white);
}

.page-contact .ct-flow__item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--f6-mist);
}

.page-contact .ct-flow__hint {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--f6-mist);
}

.page-contact .ct-flow__hint a {
  color: var(--f6-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 211, 255, 0.45);
  transition: color 0.2s var(--f6-ease), border-color 0.2s var(--f6-ease);
}

.page-contact .ct-flow__hint a:hover {
  color: var(--f6-orange);
  border-bottom-color: var(--f6-orange);
}

/* ---------- 合作与互校 ---------- */
.page-contact .ct-collab {
  margin-top: clamp(46px, 8vw, 92px);
  padding: clamp(24px, 4vw, 46px);
  border-radius: clamp(22px, 3vw, 34px);
  border: 1px solid rgba(139, 92, 246, 0.38);
  background:
    radial-gradient(92% 122% at 100% 0%, rgba(139, 92, 246, 0.24), transparent 62%),
    radial-gradient(72% 102% at 0% 100%, rgba(255, 122, 26, 0.16), transparent 60%),
    var(--f6-panel);
}

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

.page-contact .ct-collab__list li {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed rgba(36, 48, 79, 0.95);
}

.page-contact .ct-collab__idx {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--f6-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--f6-orange);
}

.page-contact .ct-collab__list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--f6-white);
}

.page-contact .ct-collab__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--f6-mist);
}

.page-contact .ct-collab__cta {
  display: inline-block;
  margin-top: 24px;
}

/* ---------- 品牌与备案 ---------- */
.page-contact .ct-about {
  margin-top: clamp(46px, 8vw, 92px);
}

.page-contact .ct-facts {
  margin: 22px 0 0;
  display: grid;
  border-top: 1px solid var(--f6-line);
}

.page-contact .ct-fact {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--f6-line);
}

.page-contact .ct-fact dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--f6-mist);
}

.page-contact .ct-fact dd {
  margin: 0;
  font-family: var(--f6-mono);
  font-size: 13.5px;
  color: var(--f6-white);
  overflow-wrap: anywhere;
}

.page-contact .ct-about__links {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .ct-about__links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--f6-pill);
  border: 1px solid var(--f6-line);
  font-size: 13px;
  color: var(--f6-mist);
  text-decoration: none;
  transition: color 0.2s var(--f6-ease), border-color 0.2s var(--f6-ease);
}

.page-contact .ct-about__links a:hover {
  color: var(--f6-orange);
  border-color: rgba(255, 122, 26, 0.6);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .ct-facts {
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(28px, 5vw, 64px);
  }

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

@media (min-width: 900px) {
  .page-contact .ct-board {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-contact .ct-board__fig {
    position: sticky;
    top: 96px;
  }

  .page-contact .ct-prep {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-contact .ct-prep__fig {
    transform: rotate(-2deg);
  }

  .page-contact .ct-collab__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 34px);
  }

  .page-contact .ct-collab__list li {
    border-bottom: 0;
    border-top: 1px solid rgba(139, 92, 246, 0.35);
    padding: 16px 0 0;
  }
}

@media (min-width: 1200px) {
  .page-contact .ct-channel__value {
    font-size: clamp(1.3rem, 1.9vw, 1.85rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-check__label,
  .page-contact .ct-check__tick,
  .page-contact .ct-about__links a,
  .page-contact .ct-crumbs a,
  .page-contact .ct-flow__hint a {
    transition: none;
  }

  .page-contact .ct-prep__fig {
    transform: none;
  }
}