.page-contact {
  background: var(--green-900);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(24px, 4vw, 44px) clamp(40px, 6vw, 74px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -12% -18% 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(560px 340px at 78% 4%, rgba(47, 240, 196, .15), transparent 70%),
    radial-gradient(420px 260px at 2% 94%, rgba(255, 176, 32, .08), transparent 72%);
}

.page-contact .contact-hero__kicker {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 20ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .contact-hero__lead {
  margin-top: clamp(16px, 2vw, 22px);
  max-width: 58ch;
  color: rgba(242, 247, 244, .76);
}

/* 三通道速览 */
.page-contact .contact-strip {
  margin-top: clamp(34px, 4.5vw, 58px);
  display: grid;
  gap: 1px;
  background: var(--green-500);
  border: 1px solid var(--green-500);
  border-radius: var(--r-m);
  overflow: hidden;
}

@media (min-width: 820px) {
  .page-contact .contact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .contact-strip__item {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--green-700);
}

.page-contact .contact-strip__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--cyan-400);
  overflow-wrap: anywhere;
  transition: color 160ms var(--ease);
}

.page-contact .contact-strip__value--soft {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .005em;
}

.page-contact .contact-strip__item:hover .contact-strip__value {
  color: var(--cyan-200);
}

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

/* ---------- 章节头补充 ---------- */
.page-contact .section__note {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 通道切换 ---------- */
.page-contact .contact-split {
  display: grid;
  gap: var(--gap-m);
  margin-top: clamp(24px, 3vw, 36px);
}

@media (min-width: 980px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--gap-l);
    align-items: start;
  }
}

.page-contact .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--green-500);
}

.page-contact .tab {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
}

.page-contact .tab-panel {
  padding-top: clamp(20px, 2.6vw, 30px);
}

.page-contact .channel__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .channel__text {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(242, 247, 244, .74);
}

.page-contact .channel__text--tail {
  margin: 16px 0 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-contact .channel__text--tail a,
.page-contact .prep-note a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .channel__actions {
  margin: 4px 0 0;
}

.page-contact .channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .channel-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 247, 244, .68);
}

.page-contact .channel-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 12px;
  width: 10px;
  height: 1px;
  background: var(--cyan-400);
}

/* 深色分区的标签需要在浅色底上重设 */
.page-contact .section--tint .label--block {
  color: var(--cyan-400);
}

.page-contact .contact-media {
  margin: 0;
  border: 1px solid var(--green-500);
  border-radius: var(--r-m);
  overflow: hidden;
}

/* ---------- 值守与节奏 ---------- */
.page-contact .rhythm-grid {
  display: grid;
  gap: var(--gap-s);
  margin-top: clamp(24px, 3vw, 36px);
}

@media (min-width: 760px) {
  .page-contact .rhythm-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gap-m);
  }
}

.page-contact .rhythm-cell {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 20px;
  border-top: 1px solid var(--green-500);
}

.page-contact .rhythm-cell__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-400);
}

.page-contact .rhythm-cell__value--wide {
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: 0;
}

.page-contact .rhythm-cell p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 247, 244, .68);
}

.page-contact .rhythm-alert {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  max-width: 74ch;
  margin: clamp(26px, 3vw, 38px) 0 0;
  padding: 16px 20px;
  border: 1px solid rgba(255, 176, 32, .3);
  border-radius: var(--r-m);
  background: rgba(255, 176, 32, .07);
  font-size: 15px;
  line-height: 1.72;
  color: rgba(242, 247, 244, .82);
}

/* ---------- 合作对接 ---------- */
.page-contact .coop-tabs {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-contact .material-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 760px) {
  .page-contact .material-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .material-list li {
  padding: 12px 16px;
  border-left: 2px solid var(--green-500);
  border-radius: 0 var(--r-s) var(--r-s) 0;
  background: var(--green-700);
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 247, 244, .8);
}

/* ---------- 来函准备 ---------- */
.page-contact .prepare-grid {
  display: grid;
  gap: var(--gap-m);
  margin-top: clamp(24px, 3vw, 36px);
}

@media (min-width: 920px) {
  .page-contact .prepare-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--gap-l);
  }
}

.page-contact .prep-list ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .prep-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 1px solid var(--green-500);
  border-radius: var(--r-s);
  cursor: pointer;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(242, 247, 244, .82);
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-contact .prep-item:hover {
  border-color: var(--cyan-200);
}

.page-contact .prep-item:has(.prep-item__box:checked) {
  border-color: var(--cyan-400);
  background: rgba(47, 240, 196, .07);
}

.page-contact .prep-item__box {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--green-500);
  border-radius: 4px;
  background: rgba(255, 255, 255, .04);
  cursor: pointer;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-contact .prep-item__box:checked {
  border-color: var(--cyan-400);
  background: rgba(47, 240, 196, .18);
}

.page-contact .prep-item__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--cyan-400);
  border-bottom: 2px solid var(--cyan-400);
  transform: rotate(42deg);
}

.page-contact .prep-item__box:focus-visible {
  outline: 2px solid var(--cyan-200);
  outline-offset: 2px;
}

.page-contact .prep-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .mail-template {
  margin: 14px 0 0;
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--green-500);
  border-radius: var(--r-m);
  background: var(--green-900);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: rgba(242, 247, 244, .86);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- 地址与备案 ---------- */
.page-contact .contact-address {
  color: var(--ink-900);
}

.page-contact .contact-address .section__head h2 {
  color: var(--ink-900);
}

.page-contact .contact-address .section__note {
  color: var(--ink-600);
}

.page-contact .contact-address .label {
  color: var(--ink-600);
}

.page-contact .addr-grid {
  display: grid;
  gap: var(--gap-m);
  margin-top: clamp(24px, 3vw, 36px);
}

@media (min-width: 920px) {
  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: var(--gap-l);
    align-items: stretch;
  }
}

.page-contact .addr-card {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid #D6E1D9;
  border-radius: var(--r-l);
  background: #FFFFFF;
  box-shadow: 0 20px 46px -34px rgba(4, 21, 14, .5);
}

.page-contact .addr-pin {
  color: var(--green-500);
}

.page-contact .addr-card__value {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
  color: var(--ink-900);
}

.page-contact .addr-list {
  margin: 2px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: #D6E1D9;
  border-block: 1px solid #D6E1D9;
}

.page-contact .addr-list > div {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  background: #FFFFFF;
}

.page-contact .addr-list dt {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-600);
}

.page-contact .addr-list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .addr-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-600);
}

.page-contact .addr-media {
  margin: 0;
  border: 1px solid #D6E1D9;
  border-radius: var(--r-l);
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-strip__value,
  .page-contact .prep-item,
  .page-contact .prep-item__box {
    transition: none;
  }
}