.page-contact {
  --pc-edge: 2px solid var(--line-000);
  --pc-shadow: 6px 6px 0 0 #000;
  --pc-gap: clamp(14px, 2.2vw, 24px);
  --pc-pad: clamp(18px, 2.6vw, 30px);
}

.page-contact .pc-intro {
  padding-block: clamp(20px, 4vw, 40px) clamp(24px, 4vw, 40px);
}

.page-contact .pc-intro__title {
  margin: 6px 0 var(--fs-16);
  max-width: 17ch;
  font-size: var(--fs-40);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-contact .pc-intro__lede {
  max-width: 44ch;
  color: var(--muted);
  font-size: var(--fs-16);
  line-height: 1.85;
  margin: 0;
}

/* 通栏氛围带 */
.page-contact .pc-band {
  position: relative;
  margin: 0;
  border-top: var(--pc-edge);
  border-bottom: var(--pc-edge);
  background: var(--ink-100);
  overflow: hidden;
}

.page-contact .pc-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(120px, 19vw, 210px);
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.66;
  filter: saturate(0.85);
}

.page-contact .pc-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 16, 12, 0.35) 0%, rgba(6, 16, 12, 0.05) 45%, rgba(6, 16, 12, 0.9) 100%);
  pointer-events: none;
}

.page-contact .pc-band__cap {
  position: absolute;
  left: clamp(16px, 4.5vw, 48px);
  bottom: 12px;
  z-index: 1;
  max-width: 30ch;
  padding: 4px 10px;
  border-left: 2px solid var(--volt);
  background: rgba(6, 16, 12, 0.8);
  color: var(--muted);
  font-size: var(--fs-12);
  line-height: 1.7;
}

/* 通道区 */
.page-contact .pc-channels {
  padding-block: clamp(28px, 5vw, 56px) clamp(28px, 5vw, 48px);
}

.page-contact .pc-channels__head h2 {
  margin: 6px 0 0;
  font-size: var(--fs-28);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--paper);
}

.page-contact .pc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .pc-grid__main,
.page-contact .pc-grid__side {
  min-width: 0;
}

.page-contact .pc-grid__side {
  display: grid;
  gap: var(--pc-gap);
  align-content: start;
}

/* 通道块：邮箱最大、电话居中、地址最小 */
.page-contact .pc-card {
  position: relative;
  display: block;
  border: var(--pc-edge);
  background: var(--ink-200);
  box-shadow: var(--pc-shadow);
  padding: var(--pc-pad);
  margin-bottom: var(--pc-gap);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-contact .pc-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 4px;
  background: var(--volt);
}

.page-contact .pc-card--phone::before {
  background: var(--cyan);
}

.page-contact .pc-card--addr::before {
  background: var(--signal);
}

.page-contact .pc-card__kind {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .pc-card__title {
  margin: 0 0 12px;
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .pc-card__value {
  display: inline-block;
  max-width: 100%;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--line-000);
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  color: var(--volt);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .pc-card__value--num {
  font-size: var(--fs-28);
  letter-spacing: 0.02em;
}

.page-contact .pc-card__value--addr {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.7;
  color: var(--paper);
}

.page-contact .pc-card__desc {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .pc-card__meta {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 2px solid var(--line-000);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
}

.page-contact .pc-card--mail {
  padding-block: clamp(24px, 3.4vw, 40px);
  border-left: 6px solid var(--line-000);
}

/* 右侧窄栏：准备清单 */
.page-contact .pc-ready {
  border: var(--pc-edge);
  background: var(--ink-100);
  box-shadow: var(--pc-shadow);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-contact .pc-ready__title,
.page-contact .pc-reply__title {
  margin: 0 0 10px;
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--paper);
}

.page-contact .pc-ready__lead {
  margin: 0 0 16px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}

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

.page-contact .pc-ready__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-000);
}

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

.page-contact .pc-ready__no {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--signal);
  line-height: 1.5;
}

.page-contact .pc-ready__list strong {
  display: block;
  margin-bottom: 4px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-ready__list p {
  margin: 0;
  font-size: var(--fs-12);
  line-height: 1.8;
  color: var(--muted);
}

/* 右侧窄栏：响应时效 */
.page-contact .pc-reply {
  border: var(--pc-edge);
  background: var(--ink-200);
  box-shadow: var(--pc-shadow);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-contact .pc-reply__scale {
  position: relative;
  height: 30px;
  margin: 6px 0 0;
  border-bottom: 2px solid var(--line-000);
  background-image: repeating-linear-gradient(
    to right,
    var(--line-000) 0 1px,
    transparent 1px 12.5%
  );
  background-size: 100% 14px;
  background-position: left top;
  background-repeat: repeat-x;
}

.page-contact .pc-reply__scale::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 68%;
  height: 2px;
  background: linear-gradient(90deg, var(--volt), var(--signal));
}

.page-contact .pc-reply__time {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 14px 0 12px;
  font-size: var(--fs-12);
  line-height: 1.5;
  color: var(--muted);
}

.page-contact .pc-reply__num {
  font-family: var(--font-mono);
  font-size: var(--fs-40);
  font-weight: 700;
  line-height: 0.9;
  color: var(--signal);
}

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

.page-contact .pc-reply__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-12);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .pc-reply__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--volt);
}

/* 合作区 */
.page-contact .pc-coop {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(32px, 5.5vw, 72px);
  border-top: 2px solid var(--line-000);
}

.page-contact .pc-coop__body {
  min-width: 0;
}

.page-contact .pc-coop__body h2 {
  margin: 6px 0 14px;
  max-width: 20ch;
  font-size: var(--fs-28);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .pc-coop__lead {
  margin: 0 0 20px;
  max-width: 44ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--muted);
}

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

.page-contact .pc-coop__list li {
  padding-left: 14px;
  border-left: 2px solid var(--volt);
  display: grid;
  gap: 4px;
}

.page-contact .pc-coop__list strong {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-coop__list span {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .pc-coop__tip {
  margin: 0 0 22px;
  padding: 14px 16px;
  border: 2px solid var(--line-000);
  background: var(--ink-100);
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--paper);
  max-width: 52ch;
}

.page-contact .pc-coop__fig {
  margin: 0;
  min-width: 0;
  border: var(--pc-edge);
  box-shadow: var(--pc-shadow);
  background: var(--ink-100);
}

.page-contact .pc-coop__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  opacity: 0.85;
}

.page-contact .pc-coop__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--line-000);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--muted);
}

/* 属地与备案 */
.page-contact .pc-stamp {
  border-top: 2px solid var(--line-000);
  padding-block: clamp(24px, 4vw, 44px) clamp(44px, 7vw, 84px);
  display: grid;
  gap: 14px;
}

.page-contact .pc-stamp h2 {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .pc-stamp p {
  margin: 0;
  max-width: 46ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .pc-stamp__links {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-contact .pc-stamp__links a {
  font-size: var(--fs-14);
  color: var(--paper);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--line-000);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

@media (hover: hover) {
  .page-contact .pc-card:hover {
    border-color: var(--volt);
    box-shadow: 6px 6px 0 0 var(--ink-000), 0 0 0 2px var(--volt) inset;
  }

  .page-contact .pc-card:hover .pc-card__value {
    color: var(--lime);
    border-color: var(--volt);
  }

  .page-contact .pc-stamp__links a:hover {
    color: var(--volt);
    border-color: var(--volt);
  }
}

@media (min-width: 720px) {
  .page-contact .pc-card__value {
    font-size: var(--fs-20);
  }

  .page-contact .pc-card__value--num {
    font-size: var(--fs-40);
  }

  .page-contact .pc-card__value--addr {
    font-size: var(--fs-20);
  }

  .page-contact .pc-card--phone {
    width: 88%;
  }

  .page-contact .pc-card--addr {
    width: 74%;
  }

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

@media (min-width: 900px) {
  .page-contact .pc-intro__title {
    font-size: var(--fs-64);
  }

  .page-contact .pc-channels__head h2,
  .page-contact .pc-coop__body h2 {
    font-size: var(--fs-40);
  }

  .page-contact .pc-grid {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .pc-grid__side {
    position: sticky;
    top: 92px;
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .pc-reply__num {
    font-size: var(--fs-64);
  }

  .page-contact .pc-coop {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-card,
  .page-contact .pc-card__value,
  .page-contact .pc-stamp__links a {
    transition: none;
  }
}
<<<END>>>