.page-contact {
  --ct-gap: clamp(22px, 3.2vw, 40px);
  --ct-line: rgba(242, 235, 221, .14);
  --ct-line-soft: rgba(242, 235, 221, .09);
  background: var(--tb-ink);
  color: var(--tb-bone);
  overflow-x: hidden;
}

/* ================= 首屏框景 ================= */
.page-contact .ct-hero {
  position: relative;
  padding-top: clamp(88px, 12vw, 132px);
  background:
    radial-gradient(120% 100% at 8% 0%, rgba(62, 92, 75, .55) 0%, rgba(7, 26, 23, 0) 62%),
    linear-gradient(165deg, #0C2233 0%, #071A17 72%);
}

.page-contact .ct-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(76, 242, 212, 0), rgba(76, 242, 212, .55), rgba(255, 210, 63, .3), rgba(76, 242, 212, 0));
}

.page-contact .ct-hero__frame {
  position: relative;
  width: min(100%, var(--tb-max));
  margin-inline: auto;
  padding: 0 var(--tb-gutter) clamp(32px, 5vw, 56px);
  border-left: 1px solid var(--ct-line-soft);
  border-right: 1px solid var(--ct-line-soft);
}

.page-contact .ct-hero__title {
  margin: 14px 0 18px;
  font-family: var(--tb-display);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 66px);
  line-height: 1.04;
  letter-spacing: -.01em;
}

.page-contact .ct-hero__accent {
  position: relative;
  display: inline-block;
  color: var(--tb-whistle);
}

.page-contact .ct-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -.06em;
  height: 5px;
  background: linear-gradient(90deg, var(--tb-cyan), rgba(76, 242, 212, 0));
  transform: skewX(-18deg);
  opacity: .6;
}

.page-contact .ct-hero__lede {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: rgba(242, 235, 221, .82);
}

.page-contact .ct-hero__ruler {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  background: var(--ct-line);
  border: 1px solid var(--ct-line);
}

.page-contact .ct-hero__ruler li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: rgba(7, 26, 23, .74);
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(242, 235, 221, .78);
}

.page-contact .ct-hero__rnum {
  font-family: var(--tb-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--tb-whistle);
}

/* ================= 主体两栏 ================= */
.page-contact .ct-body {
  display: grid;
  gap: var(--ct-gap);
  padding-top: clamp(36px, 6vw, 72px);
  padding-bottom: clamp(40px, 7vw, 90px);
  align-items: start;
}

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

.page-contact .ct-main > .tb-section + .tb-section {
  padding-top: clamp(30px, 5vw, 54px);
  border-top: 1px solid var(--ct-line-soft);
}

/* ================= 清单步骤流 ================= */
.page-contact .ct-flow__head {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-contact .ct-track {
  position: relative;
  height: 6px;
  margin: 14px 0 0;
  background: rgba(242, 235, 221, .12);
  overflow: hidden;
}

.page-contact .ct-track::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, rgba(7, 26, 23, .85) 0 1px, transparent 1px 25%);
}

.page-contact .ct-track__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--tb-cyan), var(--tb-whistle));
  transition: width .3s var(--tb-ease);
}

.page-contact:has(#fstep-1:checked) .ct-track__fill { width: 25%; }
.page-contact:has(#fstep-1:checked):has(#fstep-2:checked) .ct-track__fill { width: 50%; }
.page-contact:has(#fstep-1:checked):has(#fstep-2:checked):has(#fstep-3:checked) .ct-track__fill { width: 75%; }
.page-contact:has(#fstep-1:checked):has(#fstep-2:checked):has(#fstep-3:checked):has(#fstep-4:checked) .ct-track__fill { width: 100%; }

.page-contact .ct-shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--ct-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-contact .ct-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}

.page-contact .ct-shot--list {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-contact .ct-shot--list img {
  aspect-ratio: 4 / 3;
  height: clamp(170px, 30vw, 300px);
}

.page-contact .ct-shot--coop {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .ct-shot--coop img {
  aspect-ratio: 3 / 2;
  height: clamp(180px, 32vw, 320px);
}

.page-contact .ct-shot figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(242, 235, 221, .85);
  background: rgba(7, 26, 23, .82);
  border-top: 1px solid var(--ct-line);
  border-right: 1px solid var(--ct-line);
}

.page-contact .ct-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
}

.page-contact .ct-step {
  position: relative;
  padding: clamp(18px, 2.4vw, 24px);
  background: linear-gradient(170deg, rgba(12, 34, 51, .92), rgba(7, 26, 23, .92));
  border: 1px solid var(--ct-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: background .28s var(--tb-ease), border-color .28s var(--tb-ease);
}

.page-contact .ct-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 34px;
  background: var(--tb-whistle);
  opacity: .5;
  transition: background .28s var(--tb-ease), opacity .28s var(--tb-ease), height .28s var(--tb-ease);
}

.page-contact .ct-step:has(input:checked) {
  background: linear-gradient(170deg, rgba(62, 92, 75, .6), rgba(7, 26, 23, .96));
  border-color: rgba(76, 242, 212, .45);
}

.page-contact .ct-step:has(input:checked)::before {
  background: var(--tb-cyan);
  opacity: 1;
  height: 100%;
}

.page-contact .ct-step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-contact .ct-step__num {
  font-family: var(--tb-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--tb-whistle);
}

.page-contact .ct-step__title {
  margin: 0;
  font-family: var(--tb-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: .01em;
  color: var(--tb-bone);
}

.page-contact .ct-step__text {
  max-width: 64ch;
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 235, 221, .8);
}

.page-contact .ct-step__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
}

.page-contact .ct-step__tags li {
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(242, 235, 221, .85);
  background: rgba(242, 235, 221, .04);
  border: 1px solid var(--ct-line);
  border-radius: 999px;
}

.page-contact .ct-step__check {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(242, 235, 221, .72);
  cursor: pointer;
  user-select: none;
}

.page-contact .ct-step__check input {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 20px;
  height: 20px;
  margin: 0;
  display: inline-grid;
  place-content: center;
  border: 1px solid rgba(242, 235, 221, .35);
  border-radius: 4px;
  background: rgba(242, 235, 221, .05);
  cursor: pointer;
  transition: background .2s var(--tb-ease), border-color .2s var(--tb-ease);
}

.page-contact .ct-step__check input::after {
  content: "";
  width: 5px;
  height: 9px;
  margin-top: -2px;
  border-right: 2px solid #071A17;
  border-bottom: 2px solid #071A17;
  transform: rotate(45deg) scale(0);
  transition: transform .18s var(--tb-ease);
}

.page-contact .ct-step__check input:checked {
  background: var(--tb-cyan);
  border-color: var(--tb-cyan);
}

.page-contact .ct-step__check input:checked::after {
  transform: rotate(45deg) scale(1);
}

.page-contact .ct-step__check input:focus-visible {
  outline: 2px solid var(--tb-whistle);
  outline-offset: 3px;
}

/* ================= 问题分类与自查 ================= */
.page-contact .ct-cats__lede {
  max-width: 62ch;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 235, 221, .78);
}

.page-contact .ct-cats__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .ct-cat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 10px 14px;
  padding: 18px 0;
  border-top: 1px solid var(--ct-line-soft);
}

.page-contact .ct-cat:last-child {
  border-bottom: 1px solid var(--ct-line-soft);
}

.page-contact .ct-cat__tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  white-space: nowrap;
  color: var(--cat, var(--tb-bone));
  border: 1px solid currentColor;
  border-radius: 2px;
  background: rgba(242, 235, 221, .03);
}

.page-contact .ct-cat__body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--tb-bone);
}

.page-contact .ct-cat__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 235, 221, .76);
}

.page-contact .ct-cat__link {
  grid-column: 2;
  justify-self: start;
  font-size: 13px;
  color: var(--tb-whistle);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 210, 63, .4);
  transition: color .2s var(--tb-ease), border-color .2s var(--tb-ease);
}

.page-contact .ct-cat__link:hover,
.page-contact .ct-cat__link:focus-visible {
  color: var(--tb-cyan);
  border-color: rgba(76, 242, 212, .6);
}

/* ================= 合作咨询 ================= */
.page-contact .ct-coop__lede {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 235, 221, .78);
}

.page-contact .ct-coop__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-contact .ct-coop__card {
  padding: 20px 18px 22px;
  background: linear-gradient(180deg, rgba(62, 92, 75, .34), rgba(12, 34, 51, .62));
  border-top: 2px solid var(--accent, var(--tb-clay));
  border-left: 1px solid var(--ct-line);
  border-right: 1px solid var(--ct-line);
  border-bottom: 1px solid var(--ct-line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-contact .ct-coop__card h3 {
  margin: 0 0 10px;
  font-family: var(--tb-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--tb-bone);
}

.page-contact .ct-coop__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 235, 221, .78);
}

.page-contact .ct-coop__hint {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px dashed rgba(242, 235, 221, .16);
  font-family: var(--tb-mono);
  font-size: 12px !important;
  letter-spacing: .04em;
  color: rgba(76, 242, 212, .85) !important;
}

/* ================= 提交之后 ================= */
.page-contact .ct-after__list {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
}

.page-contact .ct-after__item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 18px;
  background: rgba(242, 235, 221, .03);
  border-left: 2px solid var(--tb-moss);
}

.page-contact .ct-after__dot {
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--tb-cyan);
  box-shadow: 0 0 0 3px rgba(76, 242, 212, .14);
}

.page-contact .ct-after__item h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--tb-bone);
}

.page-contact .ct-after__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 235, 221, .76);
}

/* ================= 联系侧栏 ================= */
.page-contact .ct-side {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-contact .ct-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 24px);
  background: linear-gradient(165deg, rgba(12, 34, 51, .96), rgba(7, 26, 23, .96));
  border: 1px solid var(--ct-line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-contact .ct-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 3px;
  background: var(--tb-whistle);
}

.page-contact .ct-card--alt::before {
  background: var(--tb-signal);
}

.page-contact .ct-card__label {
  margin: 0 0 14px;
  font-family: var(--tb-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--tb-cyan);
}

.page-contact .ct-card__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
}

.page-contact .ct-card__row dt {
  margin-bottom: 3px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: rgba(242, 235, 221, .55);
}

.page-contact .ct-card__row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--tb-bone);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .ct-card__row--mono dd {
  font-family: var(--tb-mono);
  font-weight: 700;
  font-size: 13px;
  color: var(--tb-whistle);
}

.page-contact .ct-card__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ct-line-soft);
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(242, 235, 221, .6);
}

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

.page-contact .ct-card__links a {
  position: relative;
  display: block;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(242, 235, 221, .82);
  text-decoration: none;
  transition: color .2s var(--tb-ease);
}

.page-contact .ct-card__links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 1px;
  background: var(--tb-signal);
  transition: width .2s var(--tb-ease);
}

.page-contact .ct-card__links a:hover,
.page-contact .ct-card__links a:focus-visible {
  color: var(--tb-whistle);
}

.page-contact .ct-card__links a:hover::before,
.page-contact .ct-card__links a:focus-visible::before {
  width: 10px;
}

/* ================= 响应式 ================= */
@media (min-width: 720px) {
  .page-contact .ct-hero__ruler {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .ct-cat {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px 18px;
  }

  .page-contact .ct-cat__link {
    grid-column: 3;
    align-self: center;
  }

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

@media (min-width: 980px) {
  .page-contact .ct-body {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 348px);
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-contact .ct-side {
    position: sticky;
    top: calc(var(--tb-hh) + 24px);
    padding-left: clamp(18px, 2.2vw, 28px);
    border-left: 1px solid var(--ct-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-track__fill,
  .page-contact .ct-step,
  .page-contact .ct-step::before,
  .page-contact .ct-cat__link,
  .page-contact .ct-card__links a,
  .page-contact .ct-card__links a::before,
  .page-contact .ct-step__check input,
  .page-contact .ct-step__check input::after {
    transition: none !important;
  }
}
<<<END>>>

.page-contact {
  --accent: currentColor;
  --cat: currentColor;
}