.page-contact {
  --pc-grid-line: rgba(0, 229, 255, .07);
  --pc-hairline: rgba(0, 229, 255, .2);
  --pc-cyan-veil: rgba(0, 229, 255, .12);
  background: var(--page-bg);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(28px, 5vw, 50px) clamp(48px, 7vw, 88px);
  background:
    radial-gradient(120% 140% at 88% 4%, rgba(0, 229, 255, .2), transparent 58%),
    radial-gradient(90% 120% at 2% 96%, rgba(255, 46, 147, .13), transparent 62%),
    linear-gradient(158deg, var(--navy) 0%, var(--navy-3) 52%, var(--navy-deep) 100%);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--pc-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--pc-grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 72% 18%, #000 8%, transparent 72%);
  mask-image: radial-gradient(ellipse at 72% 18%, #000 8%, transparent 72%);
}

.page-contact .pc-hero__kicker {
  margin: 22px 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .pc-hero__title {
  margin: 0 0 18px;
  max-width: min(100%, 780px);
  font-size: clamp(29px, 5.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--white);
}

.page-contact .pc-hero__lead {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-contact .pc-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--on-dark);
  word-break: break-all;
}

.page-contact .pc-hero__meta li::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(0, 196, 140, .18);
}

/* ---------- 左右分屏：反馈渠道 ---------- */
.page-contact .pc-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .pc-split__main {
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
  align-content: start;
}

.page-contact .pc-side {
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
  align-content: start;
}

.page-contact .pc-pre {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
  padding: clamp(20px, 3vw, 30px);
  background: var(--panel-bg);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

.page-contact .pc-pre__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.page-contact .pc-pre__hint {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--ink-faint);
}

.page-contact .pc-pre__note {
  margin: 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .pc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .pc-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--mist);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .2s ease, background .2s ease, color .2s ease, transform .2s ease;
}

.page-contact .pc-chip:hover,
.page-contact .pc-chip:focus-visible {
  border-color: var(--cyan);
  background: var(--pc-cyan-veil);
  color: var(--ink-strong);
  transform: translateY(-1px);
}

.page-contact .pc-chip__num {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--navy);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.35;
}

.page-contact .pc-version {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-contact .pc-version__code {
  padding: 8px 12px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--mist);
  color: var(--ink-strong);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
}

.page-contact .pc-steps {
  counter-reset: pcstep;
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-steps li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-contact .pc-steps li::before {
  counter-increment: pcstep;
  content: counter(pcstep, decimal-leading-zero);
  flex: none;
  margin-top: 2px;
  padding: 3px 6px;
  border-radius: 4px;
  background: var(--pc-cyan-veil);
  color: var(--cyan-deep);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
}

/* ---------- 图片容器 ---------- */
.page-contact .pc-flow {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-lg);
}

.page-contact .pc-channels {
  aspect-ratio: 4 / 3;
  border-radius: var(--r-lg);
}

.page-contact .pc-flow img,
.page-contact .pc-channels img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 右栏信息卡 ---------- */
.page-contact .pc-card-dark {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy-2) 100%);
  color: var(--on-dark);
}

.page-contact .pc-card-dark::after {
  content: "";
  position: absolute;
  top: -46px;
  right: -46px;
  width: 158px;
  height: 158px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 255, .22), transparent 70%);
  pointer-events: none;
}

.page-contact .pc-card-dark__label {
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .pc-contact {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-contact__k {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--on-dark-faint);
}

.page-contact .pc-contact__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 16px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .pc-contact__v--plain {
  color: var(--white);
}

.page-contact .pc-card-dark__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
  font-size: 13px;
  line-height: 1.72;
  color: var(--on-dark-soft);
}

.page-contact .pc-card-light {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel-bg);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

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

.page-contact .pc-timeline li {
  position: relative;
  margin-left: 5px;
  padding: 0 0 20px 26px;
  border-left: 1px solid var(--line-strong);
}

.page-contact .pc-timeline li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .pc-timeline li::before {
  content: "";
  position: absolute;
  top: 5px;
  left: -5.5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, .16);
}

.page-contact .pc-timeline__t {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-strong);
}

.page-contact .pc-timeline__d {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 常见反馈分类 ---------- */
.page-contact .pc-cats {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .pc-cat {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  background: var(--panel-bg);
  box-shadow: var(--shadow-card);
  scroll-margin-top: 130px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}

.page-contact .pc-cat:hover {
  border-left-color: var(--gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-contact .pc-cat__id {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-contact .pc-cat__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--ink-strong);
}

.page-contact .pc-cat__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-soft);
}

/* ---------- 资料下载协助 ---------- */
.page-contact .pc-assist {
  border-block: 1px solid var(--line);
}

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

.page-contact .pc-help {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel-bg);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-card);
}

.page-contact .pc-help .dot {
  display: inline-block;
}

.page-contact .pc-help__title {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.45;
  color: var(--ink-strong);
}

.page-contact .pc-help__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ink-soft);
}

.page-contact .pc-help__tip {
  margin: 0;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  background: var(--mist);
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  line-height: 1.6;
}

/* ---------- 地址与备案 ---------- */
.page-contact .pc-legal {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--r-xl);
  background:
    radial-gradient(90% 130% at 92% 8%, rgba(255, 184, 0, .16), transparent 60%),
    linear-gradient(140deg, var(--navy-3) 0%, var(--navy) 100%);
  color: var(--on-dark);
}

.page-contact .pc-legal__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .pc-legal__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-contact .pc-legal__desc {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-contact .pc-legal__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-legal__list li {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .pc-legal__list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-contact .pc-legal__k {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--on-dark-faint);
}

.page-contact .pc-legal__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(13.5px, 1.6vw, 15px);
  line-height: 1.6;
  color: var(--on-dark);
  word-break: break-all;
}

/* ---------- 下一步 ---------- */
.page-contact .pc-next__inner {
  display: grid;
  gap: 24px;
  padding-top: clamp(8px, 2vw, 20px);
}

.page-contact .pc-next__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--ink-strong);
}

.page-contact .pc-next__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .pc-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .pc-legal {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
    gap: 36px;
  }

  .page-contact .pc-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 980px) {
  .page-contact .pc-split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }
}

@media (max-width: 520px) {
  .page-contact .pc-hero__meta li {
    width: 100%;
  }

  .page-contact .pc-next__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-chip,
  .page-contact .pc-cat {
    transition: none;
  }
}
<<<END>>>