.page-contact {
  --pc-angle: 20px;
  --pc-panel-width: 380px;
  background:
    radial-gradient(120% 70% at 88% 0%, rgba(58, 7, 16, 0.55) 0%, rgba(11, 13, 16, 0) 62%),
    var(--ms-ink);
  color: var(--ms-frost);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(16px, 3vw, 30px) clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--ms-line);
  background-image:
    radial-gradient(80% 60% at 78% 4%, rgba(58, 7, 16, 0.6) 0%, rgba(11, 13, 16, 0) 70%),
    repeating-linear-gradient(to right, var(--ms-line) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(to bottom, var(--ms-line) 0 1px, transparent 1px 80px);
}

.page-contact .pc-hero__bg {
  position: absolute;
  top: 6%;
  right: -8%;
  width: 58%;
  max-width: 720px;
  height: auto;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, rgba(0, 0, 0, 0.4) 55%, transparent 80%);
  mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, rgba(0, 0, 0, 0.4) 55%, transparent 80%);
}

.page-contact .pc-hero .ms-container {
  position: relative;
  z-index: 1;
}

.page-contact .pc-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: clamp(18px, 3vw, 32px);
}

.page-contact .pc-hero__lead h1 {
  margin: 10px 0 0;
  font-family: var(--ms-font-display);
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ms-frost);
}

.page-contact .pc-hero__intro {
  max-width: 40em;
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(242, 246, 248, 0.82);
}

/* 四类反馈卡 */
.page-contact .pc-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 30px;
}

.page-contact .pc-card {
  background: var(--ms-graphite);
  box-shadow: inset 0 0 0 1px var(--ms-line);
  clip-path: polygon(var(--pc-angle) 0, 100% 0, 100% 100%, 0 100%, 0 var(--pc-angle));
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-contact .pc-card:hover {
  background: #222A34;
  box-shadow: inset 0 0 0 1px var(--ms-line-strong);
  transform: translateY(-2px);
}

.page-contact .pc-card[open] {
  box-shadow: inset 0 0 0 1px var(--ms-line-strong);
}

.page-contact .pc-card__head {
  list-style: none;
  cursor: pointer;
  display: grid;
  gap: 6px;
  padding: 16px 18px;
}

.page-contact .pc-card__head::-webkit-details-marker {
  display: none;
}

.page-contact .pc-card__head:focus-visible {
  outline: 2px solid var(--ms-ice);
  outline-offset: -4px;
}

.page-contact .pc-card__tag {
  font-family: var(--ms-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ms-ice);
}

.page-contact .pc-card__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ms-frost);
}

.page-contact .pc-card__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--ms-line);
  margin-top: 2px;
  padding-top: 14px;
}

.page-contact .pc-card__body p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 246, 248, 0.78);
}

.page-contact .pc-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-contact .pc-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.66;
  color: var(--ms-mist);
}

.page-contact .pc-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  width: 8px;
  height: 1px;
  background: var(--ms-ice);
}

/* 客服信息板 */
.page-contact .pc-panel {
  padding: 22px 20px 6px;
  border: 2px solid var(--ms-ice);
  border-radius: var(--ms-radius);
  background:
    linear-gradient(180deg, rgba(88, 200, 240, 0.1) 0%, rgba(11, 13, 16, 0.92) 55%),
    var(--ms-ink-2);
  box-shadow: 0 24px 60px -40px rgba(88, 200, 240, 0.8);
}

.page-contact .pc-panel__title {
  margin: 8px 0 12px;
  font-size: clamp(19px, 2.2vw, 22px);
  line-height: 1.35;
  color: var(--ms-frost);
}

.page-contact .pc-panel__state {
  margin: 0 0 18px;
  font-size: 0;
}

.page-contact .pc-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .pc-panel__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--ms-line);
}

.page-contact .pc-panel__key {
  font-family: var(--ms-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ms-ice);
}

.page-contact .pc-panel__val {
  font-family: var(--ms-font-mono);
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ms-frost);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .pc-panel__val--mail {
  font-size: 15px;
  color: var(--ms-ice-pale);
}

.page-contact .pc-panel__val--addr {
  font-family: var(--ms-font-sans);
  font-size: 15px;
  font-weight: 500;
}

.page-contact .pc-panel__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ms-mist);
}

/* ---------- 通用小节 ---------- */
.page-contact .pc-lede {
  max-width: 46em;
  margin: 14px 0 26px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 246, 248, 0.78);
}

.page-contact .pc-link {
  color: var(--ms-ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(88, 200, 240, 0.45);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-contact .pc-link:hover {
  color: var(--ms-ice-pale);
  border-color: var(--ms-ice-pale);
}

.page-contact .pc-link:focus-visible {
  outline: 2px solid var(--ms-ice);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 01 反馈写法 ---------- */
.page-contact .pc-write {
  border-bottom: 1px solid var(--ms-line);
}

.page-contact .pc-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .pc-check__item {
  padding-top: 16px;
  border-top: 1px solid var(--ms-line-strong);
}

.page-contact .pc-check__no {
  display: block;
  font-family: var(--ms-font-mono);
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--ms-ice);
}

.page-contact .pc-check__title {
  margin: 10px 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ms-frost);
}

.page-contact .pc-check__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ms-mist);
}

.page-contact .pc-sample {
  margin-top: 26px;
  padding: 18px 18px 10px;
  border-left: 3px solid var(--ms-ice);
  border-radius: 0 var(--ms-radius) var(--ms-radius) 0;
  background: var(--ms-ink-2);
}

.page-contact .pc-sample__head {
  margin: 0 0 8px;
  font-family: var(--ms-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ms-ice);
}

.page-contact .pc-sample__list {
  margin: 0;
}

.page-contact .pc-sample__line {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--ms-line);
}

.page-contact .pc-sample__line:last-child {
  border-bottom: 0;
}

.page-contact .pc-sample__line dt {
  font-family: var(--ms-font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.1em;
  color: var(--ms-mist);
}

.page-contact .pc-sample__line dd {
  margin: 0;
  font-family: var(--ms-font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ms-frost);
  overflow-wrap: anywhere;
}

/* ---------- 02 处理流程 ---------- */
.page-contact .pc-flow {
  background:
    repeating-linear-gradient(to bottom, var(--ms-line) 0 1px, transparent 1px 80px),
    var(--ms-ink-2);
  border-bottom: 1px solid var(--ms-line);
}

.page-contact .pc-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .pc-step {
  position: relative;
  padding-left: 24px;
  border-left: 1px solid var(--ms-line-strong);
}

.page-contact .pc-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ms-ice);
  box-shadow: 0 0 0 4px rgba(88, 200, 240, 0.16);
}

.page-contact .pc-step__time {
  margin: 0 0 4px;
  font-family: var(--ms-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ms-red);
}

.page-contact .pc-step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ms-frost);
}

.page-contact .pc-step__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ms-mist);
  transition: color 0.25s ease;
}

.page-contact .pc-flow__tail {
  margin: 32px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--ms-line);
  max-width: 44em;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(242, 246, 248, 0.76);
}

/* ---------- 03 合作与引用 ---------- */
.page-contact .pc-coop__media {
  position: relative;
  margin: 0 0 30px;
  border: 2px solid var(--ms-line-strong);
  border-radius: var(--ms-radius);
  overflow: hidden;
}

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

.page-contact .pc-coop__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(58, 7, 16, 0.62) 0%, rgba(11, 13, 16, 0.18) 48%, rgba(88, 200, 240, 0.24) 100%);
}

.page-contact .pc-coop__text {
  max-width: 36em;
}

.page-contact .pc-coop__text p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(242, 246, 248, 0.8);
}

.page-contact .pc-coop__text p:last-child {
  margin-bottom: 0;
}

/* ---------- 返回顶部 ---------- */
.page-contact .pc-end {
  padding-block: 40px 56px;
}

.page-contact .pc-top {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 2px;
  border-top: 2px solid var(--ms-red);
  border-bottom: 2px solid var(--ms-red);
  font-family: var(--ms-font-mono);
  text-decoration: none;
  color: var(--ms-frost);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-contact .pc-top__arrow {
  font-size: 18px;
  line-height: 1;
  color: var(--ms-red);
}

.page-contact .pc-top__label {
  font-size: 12px;
  letter-spacing: 0.24em;
}

.page-contact .pc-top:hover {
  color: var(--ms-ice);
  border-color: var(--ms-ice);
}

.page-contact .pc-top:hover .pc-top__arrow {
  color: var(--ms-ice);
}

.page-contact .pc-top:focus-visible {
  outline: 2px solid var(--ms-ice);
  outline-offset: 4px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .pc-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    align-items: start;
  }

  .page-contact .pc-check {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 960px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.82fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .pc-panel {
    position: sticky;
    top: 96px;
  }

  .page-contact .pc-write__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--pc-panel-width);
    gap: 44px;
    align-items: start;
  }

  .page-contact .pc-sample {
    margin-top: 0;
  }

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

  .page-contact .pc-step {
    padding-left: 0;
    padding-right: 28px;
    padding-top: 26px;
    border-left: 0;
    border-top: 1px solid var(--ms-line-strong);
  }

  .page-contact .pc-step::before {
    left: 0;
    top: -5px;
  }

  .page-contact .pc-step:last-child {
    padding-right: 0;
  }

  .page-contact .pc-coop__media {
    margin-bottom: 40px;
  }
}

@media (min-width: 960px) and (hover: hover) {
  .page-contact .pc-step__note {
    color: rgba(166, 178, 190, 0.66);
  }

  .page-contact .pc-step:hover .pc-step__note,
  .page-contact .pc-step:focus-within .pc-step__note {
    color: var(--ms-mist);
  }
}

@media (max-width: 719px) {
  .page-contact .pc-hero__bg {
    width: 96%;
    right: -26%;
    top: 0;
    opacity: 0.14;
  }
}
<<<END>>>