.page-contact {
  --pc-line: rgba(201, 211, 216, 0.9);
  --pc-line-soft: rgba(201, 211, 216, 0.55);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(8px, 2vw, 24px);
}

.page-contact .pc-num {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink-blue);
  margin-right: 4px;
  letter-spacing: -0.02em;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  padding: clamp(20px, 3vw, 32px) 0 clamp(48px, 7vw, 88px);
}

.page-contact .pc-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.page-contact .pc-hero__intro .display-xl {
  margin: 12px 0 0;
  color: var(--ink-blue);
  letter-spacing: -0.025em;
}

.page-contact .pc-hero__lead {
  margin: 20px 0 0;
  max-width: 36rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--grey);
}

.page-contact .pc-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  color: var(--grey);
}

.page-contact .pc-hero__facts li {
  display: inline-flex;
  align-items: baseline;
}

.page-contact .pc-hero__figure {
  position: relative;
  margin: 32px 0 0;
  max-width: 560px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--pc-line);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}

.page-contact .pc-hero__figure::before,
.page-contact .pc-hero__figure::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--cyan);
  opacity: 0.75;
}

.page-contact .pc-hero__figure::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .pc-hero__figure::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-contact .pc-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
}

/* ---------- 联系卡片 ---------- */
.page-contact .pc-card {
  position: relative;
  padding: clamp(24px, 3vw, 32px) clamp(20px, 3vw, 28px);
  isolation: isolate;
}

.page-contact .pc-card::before,
.page-contact .pc-card::after {
  content: "";
  position: absolute;
  border-radius: var(--card-radius);
}

.page-contact .pc-card::before {
  inset: 14px -8px -14px 10px;
  background: var(--orange-soft);
  border: 1px solid rgba(242, 140, 40, 0.32);
  transform: rotate(-0.8deg);
}

.page-contact .pc-card::after {
  inset: 0;
  background: #fff;
  border: 1px solid var(--pc-line);
  box-shadow: var(--shadow-card);
}

.page-contact .pc-card > * {
  position: relative;
  z-index: 1;
}

.page-contact .pc-card__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-contact .pc-card__title {
  margin: 10px 0 0;
  color: var(--ink-blue);
  font-size: 1.25rem;
  line-height: 1.4;
}

.page-contact .pc-card__contact {
  margin: 22px 0 0;
  display: grid;
  gap: 14px;
}

.page-contact .pc-card__contact > div {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--pc-line);
}

.page-contact .pc-card__contact > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .pc-card__contact dt {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-contact .pc-card__contact dd {
  margin: 5px 0 0;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-blue);
  overflow-wrap: anywhere;
}

.page-contact .pc-card__note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--grey);
}

.page-contact .pc-card__actions {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

/* ---------- 章节标题 ---------- */
.page-contact .pc-sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .pc-sec-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--cyan);
}

.page-contact .pc-sec-head .h2 {
  margin: 0;
  color: var(--ink-blue);
  letter-spacing: -0.015em;
}

.page-contact .pc-sec-lead {
  grid-column: 2;
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 问题分流 ---------- */
.page-contact .pc-routes {
  padding: clamp(48px, 7vw, 88px) 0;
  background: var(--sage);
  border-top: 1px solid var(--pc-line);
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-contact .pc-route {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.page-contact .pc-route .tag {
  align-self: flex-start;
}

.page-contact .pc-route .card-title {
  margin: 8px 0 0;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--ink-blue);
}

.page-contact .pc-route .card-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--grey);
}

.page-contact .pc-route__more {
  width: 100%;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .pc-route__more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-blue);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-route__more summary::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.2s var(--ease);
}

.page-contact .pc-route__more[open] summary::after {
  transform: rotate(-135deg) translateY(-2px);
}

.page-contact .pc-route__more summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-contact .pc-route__more ul {
  margin: 8px 0 2px;
  padding-left: 18px;
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 准备清单 ---------- */
.page-contact .pc-prepare {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-contact .pc-prepare__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-contact .pc-prepare__note {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--grey);
}

.page-contact .pc-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .pc-compare__col {
  padding: 16px 18px;
  border: 1px solid var(--pc-line);
  border-radius: var(--card-radius);
  background: #fff;
}

.page-contact .pc-compare__col--good {
  background: var(--mist);
  border-color: rgba(15, 163, 163, 0.38);
}

.page-contact .pc-compare__col--weak {
  background: var(--orange-soft);
  border-color: rgba(242, 140, 40, 0.38);
}

.page-contact .pc-compare__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--ink-blue);
}

.page-contact .pc-compare__sample {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .pc-prepare__list {
  counter-reset: pcstep;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-prepare__list > li {
  counter-increment: pcstep;
  position: relative;
  padding: 20px 0 20px 52px;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-prepare__list > li::before {
  content: counter(pcstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-contact .pc-prepare__list .h3 {
  margin: 0;
  font-size: 1.0625rem;
  color: var(--ink-blue);
}

.page-contact .pc-prepare__list p {
  margin: 8px 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 响应流程（深色区） ---------- */
.page-contact .pc-reply {
  padding: clamp(48px, 7vw, 96px) 0;
  background-color: var(--ink-blue);
  background-image: radial-gradient(circle at 88% 0%, rgba(15, 163, 163, 0.32), transparent 56%);
  color: #fff;
}

.page-contact .pc-reply .pc-sec-head .h2 {
  color: #fff;
}

.page-contact .pc-reply .pc-sec-lead {
  color: rgba(255, 255, 255, 0.72);
}

.page-contact .pc-reply__figure {
  margin: 0 0 clamp(32px, 5vw, 48px);
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--card-radius);
  background: rgba(255, 255, 255, 0.04);
}

.page-contact .pc-reply__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
}

.page-contact .pc-track {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-track__node {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.22);
  outline: none;
}

.page-contact .pc-track__node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(15, 163, 163, 0.22);
  transition: background-color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-contact .pc-track__time {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .pc-track__title {
  margin: 8px 0 0;
  font-size: 1rem;
  line-height: 1.5;
  color: #fff;
}

.page-contact .pc-track__text {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.76);
}

.page-contact .pc-track__note {
  margin: 10px 0 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.58);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-contact .pc-track__node:hover::before,
.page-contact .pc-track__node:focus-within::before,
.page-contact .pc-track__node:focus::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(242, 140, 40, 0.28);
}

.page-contact .pc-track__node:hover .pc-track__note,
.page-contact .pc-track__node:focus-within .pc-track__note,
.page-contact .pc-track__node:focus .pc-track__note {
  opacity: 1;
  transform: none;
}

.page-contact .pc-track__node:focus-visible {
  border-left-color: var(--orange);
}

.page-contact .pc-reply__stat {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(32px, 5vw, 48px);
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.page-contact .pc-reply__stat p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.76);
}

.page-contact .pc-reply__stat .pc-num {
  font-size: 1.75rem;
  color: #fff;
  margin-right: 8px;
}

/* ---------- 升级路径 ---------- */
.page-contact .pc-escalate {
  padding: clamp(48px, 7vw, 96px) 0;
  background: var(--paper);
}

.page-contact .pc-escalate__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-escalate__item {
  position: relative;
  padding: 28px 22px 24px;
  border: 1px solid var(--pc-line);
  border-radius: var(--card-radius);
  background: #fff;
  box-shadow: var(--shadow-card);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .pc-escalate__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--cyan);
}

.page-contact .pc-escalate__item:nth-child(2)::before {
  background: var(--ink-blue);
}

.page-contact .pc-escalate__item:nth-child(3)::before {
  background: var(--orange);
}

.page-contact .pc-escalate__item:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-contact .pc-escalate__tier {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--grey);
}

.page-contact .pc-escalate__item .h3 {
  margin: 10px 0 0;
  font-size: 1.0625rem;
  color: var(--ink-blue);
}

.page-contact .pc-escalate__item p {
  margin: 10px 0 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--grey);
}

/* ---------- 信息使用提示 ---------- */
.page-contact .pc-notice {
  padding: clamp(24px, 4vw, 40px) 0 clamp(48px, 7vw, 80px);
}

.page-contact .pc-notice__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid rgba(242, 140, 40, 0.42);
  border-radius: var(--card-radius);
  background: var(--orange-soft);
}

.page-contact .pc-notice__box .h3 {
  margin: 0;
  font-size: 1.125rem;
  color: var(--ink-blue);
}

.page-contact .pc-notice__box p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--ink);
}

.page-contact .pc-notice__box a {
  color: var(--ink-blue);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

.page-contact .pc-notice__box a:hover {
  text-decoration-color: var(--orange);
}

.page-contact .pc-notice__box a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
  border-radius: 3px;
}

.page-contact .pc-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  padding-bottom: 3px;
  font-size: 0.875rem;
  color: var(--ink-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-contact .pc-top::before {
  content: "↑";
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-contact .pc-top:hover {
  color: var(--cyan);
}

.page-contact .pc-top:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-route-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .pc-compare {
    grid-template-columns: 1.35fr minmax(0, 1fr);
  }

  .page-contact .pc-reply__stat {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-contact .pc-prepare__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

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

  .page-contact .pc-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }

  .page-contact .pc-track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 11px;
    height: 1px;
    background-image: repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.42) 0 7px,
      transparent 7px 15px
    );
  }

  .page-contact .pc-track__node {
    padding-left: 0;
    padding-top: 34px;
    border-left: 0;
  }

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

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

@media (min-width: 1024px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .pc-card {
    position: sticky;
    top: 104px;
  }

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

  .page-contact .pc-route:last-child {
    grid-column: span 2;
  }

  .page-contact .pc-notice__box {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: center;
    gap: 24px;
  }
}

@media (hover: none) {
  .page-contact .pc-track__note {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-escalate__item,
  .page-contact .pc-track__note,
  .page-contact .pc-route__more summary::after {
    transition: none;
  }

  .page-contact .pc-escalate__item:hover {
    transform: none;
  }

  .page-contact .pc-track__note {
    transform: none;
  }
}
<<<END>>>