.page-contact {
  --pc-gap: clamp(20px, 3.2vw, 34px);
  font-family: var(--font-body);
  color: var(--charcoal);
  background-color: var(--paper);
}

.page-contact .container {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* 首屏 */
.page-contact .pc-hero {
  padding: calc(var(--header-h) + 18px) 0 clamp(36px, 6vw, 56px);
  background:
    radial-gradient(90% 120% at 88% -12%, rgba(255, 122, 26, 0.14) 0%, rgba(255, 122, 26, 0) 62%),
    linear-gradient(180deg, #FBF7EF 0%, var(--paper) 78%);
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .pc-breadcrumb {
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--blue-mid);
}

.page-contact .pc-breadcrumb a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-contact .pc-breadcrumb a:hover {
  color: var(--orange-deep);
  border-bottom-color: var(--orange-deep);
}

.page-contact .pc-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: center;
}

.page-contact .title-display {
  margin: 10px 0 0;
  color: var(--ink);
}

.page-contact .pc-lead {
  max-width: 34em;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--charcoal);
}

.page-contact .pc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-contact .media {
  margin: 0;
}

.page-contact .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line-paper);
  border-radius: var(--radius-md);
  object-fit: cover;
  filter: saturate(0.6) contrast(1.02);
}

.page-contact .media-cap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--blue-mid);
}

/* 通道选择板 */
.page-contact .pc-channels {
  padding: clamp(32px, 5vw, 48px) 0 clamp(40px, 6vw, 64px);
  background: linear-gradient(180deg, rgba(228, 235, 241, 0.5) 0%, rgba(247, 243, 235, 0) 100%);
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .pc-channels-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.page-contact .pc-channels-head .title-section {
  margin: 0;
  color: var(--ink);
}

.page-contact .pc-channels-lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--charcoal);
}

.page-contact .pc-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .filter-btn {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1;
  padding: 8px 14px;
  border: 1px solid var(--line-paper);
  border-radius: 999px;
  background: var(--card);
  color: var(--charcoal);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-contact .filter-btn:hover {
  border-color: var(--orange);
  color: var(--ink);
}

.page-contact .filter-btn[aria-pressed="true"],
.page-contact .filter-btn.is-active {
  background: var(--orange-soft);
  border-color: var(--orange);
  color: var(--ink);
}

.page-contact .filter-status {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-contact .filter-item[hidden] {
  display: none !important;
}

.page-contact .pc-channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .pc-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 20px 18px;
  background: var(--card);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  transition: box-shadow var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  top: -1px;
  height: 3px;
  background: var(--orange);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  transition: height var(--t-fast) var(--ease);
}

.page-contact .pc-channel:hover {
  box-shadow: var(--shadow-lift);
}

.page-contact .pc-channel:hover::before,
.page-contact .pc-channel:focus-within::before {
  height: 6px;
}

.page-contact .pc-channel-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--blue-mid);
}

.page-contact .pc-channel-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-contact .pc-channel-use {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .pc-channel-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line-paper);
}

.page-contact .pc-channel-value {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--ink);
  word-break: break-all;
}

.page-contact .pc-copy {
  flex: none;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--blue);
  background: var(--paper);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.page-contact .pc-copy:hover {
  color: var(--orange-deep);
  border-color: var(--orange-deep);
  background: var(--orange-soft);
}

.page-contact .pc-copy[data-copied] {
  color: var(--green);
  border-color: var(--green);
  background: rgba(30, 107, 87, 0.08);
}

.page-contact .pc-copy-status {
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--green);
}

.page-contact .pc-copy-status:empty {
  display: none;
}

.page-contact .pc-channel-foot {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--blue);
}

/* 章节通用 */
.page-contact .section {
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-contact .pc-title-group {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
}

.page-contact .pc-title-group .index-num {
  color: var(--orange-deep);
}

.page-contact .pc-title-group .title-sep {
  display: inline-block;
  width: 1px;
  height: 18px;
  background: var(--line-paper);
}

.page-contact .pc-title-group .title-section {
  margin: 0;
  color: var(--ink);
}

/* 准备清单 */
.page-contact .pc-prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .pc-prep-lead {
  margin: 0 0 8px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .pc-check-list {
  margin-top: 12px;
  border-top: 1px solid var(--line-paper);
}

.page-contact .pc-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--line-paper);
  cursor: pointer;
}

.page-contact .pc-check-input {
  flex: none;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--orange);
  cursor: pointer;
}

.page-contact .pc-check-body {
  display: block;
  transition: opacity var(--t-fast) var(--ease);
}

.page-contact .pc-check-input:checked + .pc-check-body {
  opacity: 0.62;
}

.page-contact .pc-check-title {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .pc-check-desc {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--charcoal);
}

.page-contact .pc-note {
  margin-top: 22px;
  padding: 14px 16px;
  background: var(--sand);
  border-left: 3px solid var(--blue-mid);
  border-radius: var(--radius);
}

.page-contact .pc-note .note-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-contact .pc-note p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .pc-prep-media {
  order: -1;
}

/* 回复时间 */
.page-contact .pc-reply-inner {
  max-width: 820px;
}

.page-contact .pc-reply-lead {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .pc-time-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-paper);
}

.page-contact .pc-time-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .pc-time-label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-contact .pc-time-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .pc-reply-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--charcoal);
}

/* 版本互通与合作 */
.page-contact .pc-coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .pc-coop-lead {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .pc-steps {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .pc-steps li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-paper);
}

.page-contact .pc-steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .pc-step-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange-deep);
  padding-top: 3px;
}

.page-contact .pc-steps strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .pc-steps p {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .pc-coop-panel {
  background: var(--card);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.page-contact .pc-coop-panel .panel-head {
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .pc-coop-panel .panel-body {
  padding: 4px 16px 14px;
}

.page-contact .pc-coop-panel .panel-block {
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-paper);
}

.page-contact .pc-coop-panel .panel-block:last-child {
  border-bottom: 0;
}

.page-contact .pc-panel-title {
  margin: 0 0 5px;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
}

.page-contact .pc-coop-panel .panel-block p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
}

/* 快捷入口带 */
.page-contact .pc-shortcuts {
  padding: clamp(28px, 4vw, 44px) 0;
  background: var(--sand);
  border-top: 1px solid var(--line-paper);
  border-bottom: 1px solid var(--line-paper);
}

.page-contact .pc-shortcuts .title-sub {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .pc-shortcut-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 16px;
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .pc-shortcut {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 16px;
  background: var(--card);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-contact .pc-shortcut span {
  font-family: var(--font-mono);
  color: var(--orange-deep);
}

.page-contact .pc-shortcut:hover {
  background: var(--orange-soft);
}

/* 地址与备案 */
.page-contact .pc-addr {
  padding: 18px 18px 16px;
  background: var(--sand);
  border: 1px solid var(--line-paper);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
}

.page-contact .pc-addr-line {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .pc-addr-accordion {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-cool);
}

.page-contact .pc-addr-h {
  margin: 0;
  font-size: 12px;
  font-weight: 400;
}

.page-contact .pc-addr-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  background: none;
  border: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--blue);
  cursor: pointer;
}

.page-contact .pc-addr-trigger::after {
  content: "＋";
  color: var(--orange-deep);
  transition: transform var(--t-fast) var(--ease);
}

.page-contact .pc-addr-trigger[aria-expanded="true"]::after {
  content: "－";
}

.page-contact .pc-addr-trigger:hover {
  color: var(--orange-deep);
}

.page-contact .pc-addr-panel {
  padding-top: 8px;
  font-size: 13.5px;
  line-height: 1.85;
}

.page-contact .pc-addr-panel[hidden] {
  display: none;
}

.page-contact .pc-addr-panel p {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  word-break: break-word;
}

/* 断点 */
@media (min-width: 720px) {
  .page-contact .pc-time-row {
    grid-template-columns: 180px 1fr;
    gap: 18px;
    align-items: baseline;
  }

  .page-contact .pc-shortcut-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .page-contact .pc-channels-head {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 24px;
  }

  .page-contact .pc-prep-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-contact .pc-prep-media {
    order: 0;
  }

  .page-contact .pc-coop-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

@media (min-width: 820px) {
  .page-contact .pc-channel-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1040px) {
  .page-contact .pc-shortcut-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-channel,
  .page-contact .pc-channel::before,
  .page-contact .pc-copy,
  .page-contact .filter-btn,
  .page-contact .pc-shortcut,
  .page-contact .pc-check-body,
  .page-contact .pc-addr-trigger::after {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>
</main>