.page-contact {
  --pc-line: rgba(14, 27, 44, 0.14);
  --pc-line-light: rgba(244, 246, 248, 0.2);
  background: var(--fog);
  color: var(--ink);
}

.page-contact .yy-crumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-contact .yy-h1 {
  margin: 14px 0 0;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-contact .yy-h2 {
  margin: 12px 0 0;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  padding-block: clamp(22px, 4vw, 40px) clamp(40px, 7vw, 80px);
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--pc-line) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-contact .pc-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

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

.page-contact .pc-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .pc-channels {
  margin-top: clamp(24px, 4vw, 34px);
  border-top: 1px solid var(--pc-line);
  display: grid;
  gap: 0;
}

.page-contact .pc-channel {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--pc-line);
  min-width: 0;
}

.page-contact .pc-channel__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--graphite);
}

.page-contact .pc-channel__value {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--ink);
  word-break: break-word;
}

.page-contact .pc-channel__note {
  flex-basis: 100%;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

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

.page-contact .pc-hero__media::before {
  content: "";
  display: block;
  width: 44%;
  height: 6px;
  background: var(--yellow);
  margin-bottom: 12px;
}

.page-contact .pc-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

/* ---------- 01 邮件写法 ---------- */
.page-contact .pc-brief {
  padding-block: clamp(44px, 7vw, 84px);
}

.page-contact .pc-brief__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: start;
}

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

.page-contact .pc-brief__lead {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .pc-steps {
  list-style: none;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 0;
}

.page-contact .pc-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding-block: 18px 16px;
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-step:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .pc-step__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 5px;
}

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

.page-contact .pc-step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink);
}

.page-contact .pc-step__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
}

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

.page-contact .pc-brief__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

/* ---------- 02 事项分类 + 时段 ---------- */
.page-contact .pc-topics {
  padding-block: clamp(44px, 7vw, 84px);
}

.page-contact .pc-topics__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

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

.page-contact .pc-topics__lead {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 246, 248, 0.72);
}

.page-contact .pc-acc {
  margin-top: clamp(22px, 4vw, 32px);
}

.page-contact .pc-item {
  border-top: 1px solid var(--pc-line-light);
}

.page-contact .pc-item:last-child {
  border-bottom: 1px solid var(--pc-line-light);
}

.page-contact .pc-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .pc-item__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.page-contact .pc-item__title {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 19px);
  color: var(--fog);
  line-height: 1.4;
}

.page-contact .pc-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--yellow);
  transition: transform 240ms var(--ease);
}

.page-contact .pc-item[open] summary::after {
  content: "−";
}

.page-contact .pc-item__body {
  padding: 0 0 22px;
}

.page-contact .pc-item__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 246, 248, 0.76);
}

.page-contact .pc-item__subject {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--fog);
  background: rgba(245, 197, 24, 0.12);
  border-left: 3px solid var(--yellow);
  padding: 10px 12px;
}

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

.page-contact .pc-inline-link {
  display: inline-block;
  color: var(--mint);
  text-decoration: none;
  font-size: 14.5px;
  border-bottom: 1px solid rgba(63, 214, 168, 0.45);
  padding-bottom: 2px;
  transition: border-color 200ms var(--ease);
}

.page-contact .pc-inline-link:hover {
  border-bottom-color: var(--mint);
}

.page-contact .pc-side {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-contact .pc-side__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.3;
  color: var(--fog);
}

.page-contact .pc-side__panel {
  padding: 22px 20px;
}

.page-contact .pc-side__panel--accent {
  background: var(--yellow);
  color: var(--ink);
}

.page-contact .pc-side__panel--glass {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  color: var(--fog);
}

.page-contact .pc-side__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
}

.page-contact .pc-side__panel--accent .pc-side__label {
  color: rgba(14, 27, 44, 0.66);
}

.page-contact .pc-side__panel--glass .pc-side__label {
  color: var(--yellow);
}

.page-contact .pc-side__clock {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 31px);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.page-contact .pc-side__clock--sm {
  font-size: clamp(19px, 3vw, 24px);
  word-break: break-word;
}

.page-contact .pc-side__text {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-contact .pc-side__panel--accent .pc-side__text {
  color: rgba(14, 27, 44, 0.78);
}

.page-contact .pc-side__panel--glass .pc-side__text {
  color: rgba(244, 246, 248, 0.78);
}

/* ---------- 03 站务信息 ---------- */
.page-contact .pc-site {
  padding-block: clamp(44px, 7vw, 84px);
  border-top: 1px solid var(--pc-line);
}

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

.page-contact .pc-signs {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-contact .pc-sign {
  position: relative;
  min-width: 0;
  padding: 18px 20px 20px;
  background: var(--ink);
  color: var(--fog);
  border-left: 5px solid var(--yellow);
}

.page-contact .pc-sign__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--yellow);
}

.page-contact .pc-sign__value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.42;
  word-break: break-word;
}

.page-contact .pc-sign__value--mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(15px, 1.8vw, 19px);
  letter-spacing: 0.01em;
}

.page-contact .pc-sign__note {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 246, 248, 0.7);
}

.page-contact .pc-sign--address {
  background: var(--yellow);
  color: var(--ink);
  border-left-color: var(--ink);
}

.page-contact .pc-sign--address .pc-sign__label {
  color: rgba(14, 27, 44, 0.68);
}

.page-contact .pc-sign--address .pc-sign__value {
  font-size: clamp(20px, 3vw, 28px);
}

.page-contact .pc-site__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .pc-site__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--pc-line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--graphite);
  word-break: break-word;
}

.page-contact .pc-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: clamp(26px, 4vw, 38px);
  padding-top: clamp(18px, 3vw, 24px);
  border-top: 1px solid var(--pc-line);
}

.page-contact .pc-jump__link {
  display: inline-block;
  color: var(--ink);
  text-decoration: none;
  font-size: 15px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(63, 214, 168, 0.7);
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-contact .pc-jump__link:hover {
  border-bottom-color: var(--ink);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .pc-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .pc-brief__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .pc-signs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-contact .pc-sign--address {
    grid-column: 1 / -1;
  }
}

@media (min-width: 980px) {
  .page-contact .pc-topics__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-item summary::after,
  .page-contact .pc-inline-link,
  .page-contact .pc-jump__link {
    transition: none;
  }
}
</main>