.page-contact {
  --pc-line: rgba(199, 209, 219, .18);
  --pc-line-strong: rgba(199, 209, 219, .36);
  --pc-card-ink: #141923;
  --pc-paper-line: rgba(11, 13, 16, .16);
  --pc-paper-line-strong: rgba(11, 13, 16, .3);
  --pc-paper-text: #2b333d;
  --pc-paper-muted: #55606c;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4.5vw, 2.4rem) clamp(2.2rem, 6vw, 4.4rem);
  isolation: isolate;
}
.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(680px, 92vw);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 68% 32%, rgba(0, 229, 255, .15), transparent 62%),
    radial-gradient(circle at 32% 70%, rgba(124, 77, 255, .14), transparent 60%);
  pointer-events: none;
  z-index: -1;
}
.page-contact .pc-hero .k5-wrap {
  position: relative;
}
.page-contact .pc-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  align-items: end;
  margin-top: clamp(1.2rem, 3vw, 2rem);
}
.page-contact .pc-hero__text h1 {
  font-family: var(--k5-font-display);
  font-size: clamp(2.1rem, 7.6vw, 4.4rem);
  line-height: .98;
  letter-spacing: -.02em;
  margin: .55rem 0 0;
  color: var(--k5-paper);
  text-shadow: 0 0 36px rgba(0, 229, 255, .2);
}
.page-contact .pc-hero__text .k5-lede {
  margin-top: clamp(1rem, 2.6vw, 1.5rem);
  max-width: 46ch;
  color: var(--k5-steel);
  font-size: clamp(.96rem, 1.5vw, 1.08rem);
  line-height: 1.75;
}
.page-contact .pc-hero__figure {
  margin: 0;
  border: 1px solid var(--pc-line-strong);
  background: var(--pc-card-ink);
  position: relative;
}
.page-contact .pc-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(0, 229, 255, .12), transparent 55%);
  pointer-events: none;
}
.page-contact .pc-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}
.page-contact .pc-hero__figure figcaption {
  font-family: var(--k5-font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--k5-steel);
  padding: .6rem .85rem;
  border-top: 1px solid var(--pc-line);
}

/* ---------- 通道总览 ---------- */
.page-contact .pc-channels {
  padding-block: clamp(2.4rem, 6vw, 4.4rem);
}
.page-contact .pc-channels__head h2 {
  font-family: var(--k5-font-display);
  font-size: clamp(1.7rem, 4.2vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: .5rem 0 0;
}
.page-contact .pc-channels__intro {
  margin: .9rem 0 0;
  max-width: 58ch;
  color: var(--k5-steel);
  line-height: 1.75;
  font-size: .98rem;
}
.page-contact .pc-channels__grid {
  display: grid;
  gap: clamp(.9rem, 2.6vw, 1.4rem);
  margin-top: clamp(1.5rem, 4vw, 2.4rem);
}
.page-contact .pc-channel-stack {
  display: grid;
  gap: clamp(.9rem, 2.6vw, 1.4rem);
  align-content: start;
}

.page-contact .pc-channel {
  position: relative;
  border: 1px solid var(--pc-line-strong);
  background:
    linear-gradient(155deg, rgba(0, 229, 255, .07), rgba(0, 229, 255, 0) 58%),
    var(--pc-card-ink);
  padding: clamp(1.1rem, 3vw, 1.8rem);
}
.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 3px;
  background: var(--k5-cyan);
}
.page-contact .pc-channel--biz {
  background:
    linear-gradient(155deg, rgba(124, 77, 255, .16), rgba(124, 77, 255, 0) 58%),
    var(--pc-card-ink);
}
.page-contact .pc-channel--biz::before {
  background: var(--k5-violet);
}
.page-contact .pc-channel__top {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.page-contact .pc-channel__title {
  font-family: var(--k5-font-body);
  font-size: clamp(1.02rem, 2.2vw, 1.2rem);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--k5-paper);
  margin: .85rem 0 0;
}
.page-contact .pc-channel__list {
  list-style: none;
  margin: clamp(.9rem, 2.4vw, 1.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}
.page-contact .pc-channel__list li {
  display: grid;
  gap: .18rem;
  padding-bottom: .85rem;
  border-bottom: 1px dashed var(--pc-line);
}
.page-contact .pc-channel__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-contact .pc-channel__label {
  font-family: var(--k5-font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--k5-steel);
}
.page-contact .pc-mail {
  font-family: var(--k5-font-mono);
  font-size: clamp(.9rem, 4.2vw, 1.42rem);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--k5-paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}
.page-contact .pc-tel {
  font-family: var(--k5-font-mono);
  font-size: clamp(1rem, 4.6vw, 1.55rem);
  letter-spacing: .02em;
  color: var(--k5-cyan);
  overflow-wrap: anywhere;
}
.page-contact .pc-addr {
  font-family: var(--k5-font-body);
  font-size: .95rem;
  line-height: 1.6;
  color: var(--k5-paper);
}
.page-contact .pc-channel__note {
  margin: clamp(.9rem, 2.4vw, 1.2rem) 0 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--k5-steel);
}

/* ---------- 咨询前准备 ---------- */
.page-contact .pc-prep {
  border: 1px solid var(--pc-line-strong);
  background: var(--k5-paper);
  color: var(--pc-paper-text);
  padding: clamp(1.1rem, 3vw, 1.8rem);
  box-shadow: 6px 6px 0 rgba(0, 229, 255, .16);
}
.page-contact .pc-prep .k5-eyebrow {
  color: #3c4652;
  border-color: var(--pc-paper-line-strong);
}
.page-contact .pc-prep__title {
  font-family: var(--k5-font-editorial);
  font-size: clamp(1.28rem, 3.2vw, 1.72rem);
  line-height: 1.24;
  margin: .55rem 0 0;
  color: #12161c;
}
.page-contact .pc-prep__list {
  display: grid;
  gap: 0;
  margin-top: clamp(1rem, 2.6vw, 1.4rem);
}
.page-contact .pc-prep__item {
  display: flex;
  gap: .7rem;
  align-items: flex-start;
  padding: .8rem 0;
  border-top: 1px solid var(--pc-paper-line);
  cursor: pointer;
  font-size: .9rem;
  line-height: 1.62;
  color: var(--pc-paper-muted);
}
.page-contact .pc-prep__item strong {
  display: block;
  font-family: var(--k5-font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: #12161c;
  margin-bottom: .15rem;
}
.page-contact .pc-check {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 1.2rem;
  height: 1.2rem;
  margin: .15rem 0 0;
  border: 1px solid var(--pc-paper-line-strong);
  background: transparent;
  position: relative;
  cursor: pointer;
  transition: background var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}
.page-contact .pc-check:checked {
  background: var(--k5-cyan);
  border-color: var(--k5-cyan);
}
.page-contact .pc-check:checked::after {
  content: "";
  position: absolute;
  left: .38rem;
  top: .12rem;
  width: .3rem;
  height: .6rem;
  border: solid #0B0D10;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.page-contact .pc-check:focus-visible {
  outline: 2px solid var(--k5-violet);
  outline-offset: 2px;
}
.page-contact .pc-check:checked + span {
  color: #12161c;
}

/* ---------- 合作方向 ---------- */
.page-contact .pc-scenes {
  padding-block: clamp(2.4rem, 6vw, 4.4rem);
  color: var(--pc-paper-text);
}
.page-contact .pc-scenes__head h2 {
  font-family: var(--k5-font-editorial);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.14;
  margin: .5rem 0 0;
  color: #12161c;
}
.page-contact .pc-scenes__head .k5-eyebrow {
  color: #3c4652;
}
.page-contact .pc-scenes__intro {
  margin: .9rem 0 0;
  max-width: 56ch;
  color: var(--pc-paper-muted);
  line-height: 1.75;
}
.page-contact .pc-scenes__grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
  align-items: start;
}
.page-contact .pc-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--pc-paper-line-strong);
}
.page-contact .pc-tabs__btn {
  font-family: var(--k5-font-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  padding: .55rem .85rem;
  min-height: 40px;
  border: 1px solid var(--pc-paper-line-strong);
  background: transparent;
  color: #333b45;
  cursor: pointer;
  transition: background var(--k5-dur) var(--k5-ease), color var(--k5-dur) var(--k5-ease), border-color var(--k5-dur) var(--k5-ease);
}
.page-contact .pc-tabs__btn:hover {
  border-color: #12161c;
  color: #12161c;
}
.page-contact .pc-tabs__btn:focus-visible {
  outline: 2px solid var(--k5-violet);
  outline-offset: 2px;
}
.page-contact .pc-tabs__btn[aria-selected="true"] {
  background: var(--k5-carbon);
  border-color: var(--k5-carbon);
  color: var(--k5-yellow);
}
.page-contact .pc-tabs__panel {
  padding-top: clamp(1rem, 2.6vw, 1.5rem);
}
.page-contact .pc-tabs__panel[hidden] {
  display: none;
}
.page-contact .pc-tabs__panel h3 {
  font-family: var(--k5-font-editorial);
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  line-height: 1.3;
  margin: 0;
  color: #12161c;
}
.page-contact .pc-tabs__panel p {
  margin: .75rem 0 0;
  line-height: 1.78;
  color: var(--pc-paper-muted);
  font-size: .95rem;
}
.page-contact .pc-scenes__points {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: .45rem;
}
.page-contact .pc-scenes__points li {
  font-family: var(--k5-font-mono);
  font-size: .76rem;
  line-height: 1.6;
  color: #333b45;
  padding-left: .9rem;
  position: relative;
}
.page-contact .pc-scenes__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: .4rem;
  height: .4rem;
  background: var(--k5-violet);
}
.page-contact .pc-scenes__figure {
  margin: 0;
  border: 1px solid var(--pc-paper-line-strong);
  background: var(--k5-carbon);
}
.page-contact .pc-scenes__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}
.page-contact .pc-scenes__figure figcaption {
  font-family: var(--k5-font-mono);
  font-size: .7rem;
  letter-spacing: .05em;
  color: var(--k5-steel);
  padding: .55rem .8rem;
}

/* ---------- 响应流程 ---------- */
.page-contact .pc-flow {
  padding-block: clamp(2.4rem, 6vw, 4.2rem);
}
.page-contact .pc-flow__head h2 {
  font-family: var(--k5-font-display);
  font-size: clamp(1.6rem, 3.8vw, 2.5rem);
  line-height: 1.12;
  margin: .5rem 0 0;
}
.page-contact .pc-flow__grid {
  list-style: none;
  display: grid;
  gap: clamp(.8rem, 2.4vw, 1.2rem);
  margin: clamp(1.4rem, 3.6vw, 2.2rem) 0 0;
  padding: 0;
  counter-reset: none;
}
.page-contact .pc-flow__step {
  position: relative;
  border-top: 2px solid var(--k5-cyan);
  padding: clamp(1rem, 2.6vw, 1.4rem) 0 0;
}
.page-contact .pc-flow__step:nth-child(2) {
  border-top-color: var(--k5-violet);
}
.page-contact .pc-flow__step:nth-child(3) {
  border-top-color: var(--k5-yellow);
}
.page-contact .pc-flow__num {
  display: block;
  font-family: var(--k5-font-display);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
  color: rgba(199, 209, 219, .3);
  letter-spacing: -.02em;
}
.page-contact .pc-flow__step h3 {
  font-family: var(--k5-font-body);
  font-size: 1.05rem;
  font-weight: 700;
  margin: .55rem 0 0;
  color: var(--k5-paper);
}
.page-contact .pc-flow__step p {
  margin: .5rem 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--k5-steel);
}

/* ---------- 分流 ---------- */
.page-contact .pc-route {
  padding-block: clamp(2.2rem, 5.5vw, 3.8rem) clamp(2.6rem, 6vw, 4.4rem);
}
.page-contact .pc-route__head h2 {
  font-family: var(--k5-font-editorial);
  font-size: clamp(1.55rem, 3.8vw, 2.4rem);
  line-height: 1.16;
  margin: .5rem 0 0;
}
.page-contact .pc-route__intro {
  margin: .85rem 0 0;
  max-width: 54ch;
  color: var(--k5-steel);
  line-height: 1.75;
  font-size: .96rem;
}
.page-contact .pc-route__grid {
  display: grid;
  gap: clamp(.75rem, 2.2vw, 1.1rem);
  margin-top: clamp(1.4rem, 3.6vw, 2rem);
}
.page-contact .pc-route__card {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  border: 1px solid var(--pc-line);
  background: var(--pc-card-ink);
  padding: clamp(1rem, 2.6vw, 1.35rem);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--k5-dur) var(--k5-ease), transform var(--k5-dur) var(--k5-ease), box-shadow var(--k5-dur) var(--k5-ease);
}
.page-contact .pc-route__card:hover,
.page-contact .pc-route__card:focus-visible {
  border-color: var(--k5-cyan);
  transform: translateY(-3px);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, .35), 0 14px 30px -18px rgba(0, 229, 255, .7);
  outline: none;
}
.page-contact .pc-route__tag {
  font-family: var(--k5-font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--k5-cyan);
}
.page-contact .pc-route__card h3 {
  font-family: var(--k5-font-body);
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
  color: var(--k5-paper);
  line-height: 1.45;
}
.page-contact .pc-route__card p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.68;
  color: var(--k5-steel);
}
.page-contact .pc-route__go {
  margin-top: auto;
  padding-top: .5rem;
  font-family: var(--k5-font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--k5-yellow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-flow__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 2.5vw, 1.6rem);
  }
  .page-contact .pc-route__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .88fr);
  }
  .page-contact .pc-channels__grid {
    grid-template-columns: minmax(0, 1.34fr) minmax(0, .82fr);
    align-items: start;
  }
  .page-contact .pc-scenes__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (min-width: 1080px) {
  .page-contact .pc-route__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-contact .pc-heavy-frame {
    padding-inline: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-route__card,
  .page-contact .pc-check,
  .page-contact .pc-tabs__btn {
    transition: none;
  }
  .page-contact .pc-route__card:hover,
  .page-contact .pc-route__card:focus-visible {
    transform: none;
  }
}
<<<END>>>