.page-contact {
  --contact-hairline: rgba(10, 15, 20, .14);
  --contact-ink-mute: rgba(10, 15, 20, .55);
  color: var(--text);
}

.page-contact .crumbs-wrap {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(20px, 3.4vw, 40px) 0 clamp(32px, 5.5vw, 64px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__lede {
  max-width: 40em;
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, var(--step-4));
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-contact .contact-hero__intro {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: var(--step-0);
  line-height: 1.9;
  color: var(--text-dim);
}

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

.page-contact .contact-hero__media .media__frame {
  border: 1px solid var(--line-strong);
  background: var(--ink-800);
  overflow: hidden;
}

.page-contact .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 通道切换 ---------- */
.page-contact .channel-switch {
  padding-top: clamp(30px, 5vw, 60px);
}

.page-contact .channel-switch__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, var(--step-2));
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .channel-switch__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: var(--step-0);
  line-height: 1.9;
  color: var(--text-dim);
}

.page-contact .channel-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
}

.page-contact .channel-switch__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(22px, 4vw, 56px);
  margin-top: clamp(24px, 3.6vw, 40px);
  border-bottom: 1px solid var(--line-strong);
}

.page-contact .channel-switch__tab {
  position: relative;
  padding: 8px 2px 14px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, var(--step-1));
  letter-spacing: .01em;
  color: var(--text-mute);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-contact .channel-switch__tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.page-contact .channel-switch__tab:hover {
  color: var(--mist);
}

.page-contact #ch-player:checked ~ .channel-switch__tabs .tab-player,
.page-contact #ch-partner:checked ~ .channel-switch__tabs .tab-partner {
  color: var(--gold-light);
}

.page-contact #ch-player:checked ~ .channel-switch__tabs .tab-player::after,
.page-contact #ch-partner:checked ~ .channel-switch__tabs .tab-partner::after {
  transform: scaleX(1);
}

.page-contact .channel-switch__panels {
  padding-top: clamp(26px, 4vw, 44px);
}

.page-contact .channel-panel {
  display: none;
}

.page-contact #ch-player:checked ~ .channel-switch__panels .channel-panel[data-panel="player"],
.page-contact #ch-partner:checked ~ .channel-switch__panels .channel-panel[data-panel="partner"] {
  display: block;
  animation: contact-panel-in .26s var(--ease) both;
}

@keyframes contact-panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 面板内两栏 ---------- */
.page-contact .panel-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-contact .panel-split__media {
  margin: 0;
}

.page-contact .panel-split__media .media__frame {
  border: 1px solid var(--line);
  background: var(--bg-alt);
  overflow: hidden;
}

.page-contact .panel-split__body h3,
.page-contact .partner-intro h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, var(--step-1));
  line-height: 1.35;
  color: var(--mist);
}

.page-contact .panel-split__body > p,
.page-contact .partner-intro > p {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: var(--step-0);
  line-height: 1.9;
  color: var(--text-dim);
}

/* ---------- 联系方式列表 ---------- */
.page-contact .contact-list {
  margin: clamp(22px, 3vw, 30px) 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-list__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-list dt {
  font-size: var(--step--2);
  letter-spacing: .14em;
  color: var(--text-mute);
}

.page-contact .contact-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: .01em;
  color: var(--gold-light);
  overflow-wrap: anywhere;
}

/* ---------- 自助区 ---------- */
.page-contact .self-help {
  margin-top: clamp(26px, 3.6vw, 40px);
  padding: clamp(18px, 2.6vw, 26px) clamp(18px, 2.6vw, 28px);
  background: var(--bg-alt);
  border-left: 2px solid var(--brass);
}

.page-contact .self-help h4 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-0);
  letter-spacing: .01em;
  color: var(--gold);
}

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

.page-contact .self-help li {
  position: relative;
  padding-left: 18px;
  font-size: var(--step--1);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-contact .self-help li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 8px;
  height: 1px;
  background: var(--brass);
}

.page-contact .self-help a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid var(--brass);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .self-help a:hover {
  color: var(--mist);
  border-color: var(--gold);
}

/* ---------- 合作方向折叠 ---------- */
.page-contact .partner-intro {
  max-width: 46em;
}

.page-contact .directions {
  margin-top: clamp(22px, 3.2vw, 34px);
  border-top: 1px solid var(--line);
}

.page-contact .direction {
  border-bottom: 1px solid var(--line);
}

.page-contact .direction__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

.page-contact .direction__head::-webkit-details-marker {
  display: none;
}

.page-contact .direction__num {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .08em;
  color: var(--brass);
}

.page-contact .direction__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, var(--step-1));
  color: inherit;
  transition: color var(--dur) var(--ease);
}

.page-contact .direction__cue {
  font-size: var(--step--2);
  letter-spacing: .12em;
  color: var(--text-mute);
  white-space: nowrap;
}

.page-contact .direction__cue::before {
  content: "+";
  display: inline-block;
  width: 12px;
  margin-right: 6px;
  font-family: var(--font-mono);
  color: var(--gold);
}

.page-contact .direction[open] .direction__cue::before {
  content: "\2212";
}

.page-contact .direction:hover .direction__title,
.page-contact .direction[open] .direction__title {
  color: var(--gold-light);
}

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

.page-contact .direction__body p {
  margin: 0;
  max-width: 38em;
  font-size: var(--step--1);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-contact .direction__body ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .direction__body li {
  position: relative;
  padding-left: 18px;
  font-size: var(--step--1);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .direction__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--brass);
}

.page-contact .partner-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: var(--step--1);
  line-height: 1.85;
  color: var(--text-mute);
}

/* ---------- 流程 ---------- */
.page-contact .flow-section {
  padding-top: clamp(46px, 7vw, 88px);
}

.page-contact .flow-section h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.5vw, var(--step-2));
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--mist);
  max-width: 22em;
}

.page-contact .flow-section__lede {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: var(--step-0);
  line-height: 1.9;
  color: var(--text-dim);
}

.page-contact .flow {
  margin: clamp(28px, 4.4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  max-width: 46em;
}

.page-contact .flow__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: clamp(24px, 3.4vw, 34px);
}

.page-contact .flow__item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 32px;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

.page-contact .flow__item:last-child {
  padding-bottom: 0;
}

.page-contact .flow__item:last-child::before {
  display: none;
}

.page-contact .flow__num {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  line-height: 1;
  padding-top: 4px;
  color: var(--gold);
  transition: color var(--dur) var(--ease);
}

.page-contact .flow__item[data-visible="true"] .flow__num {
  color: var(--gold-light);
}

.page-contact .flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--step-0);
  letter-spacing: .01em;
  color: var(--mist);
}

.page-contact .flow__body p {
  margin: 8px 0 0;
  font-size: var(--step--1);
  line-height: 1.88;
  color: var(--text-dim);
}

/* ---------- 账页地址块 ---------- */
.page-contact .ledger {
  margin-top: clamp(46px, 7vw, 88px);
  padding: clamp(36px, 6vw, 72px) 0;
  background: var(--paper);
  color: var(--black);
  border-top: 1px solid var(--brass);
}

.page-contact .ledger .eyebrow {
  color: var(--contact-ink-mute);
}

.page-contact .ledger h2 {
  margin: 12px 0 0;
  max-width: 24em;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, var(--step-2));
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--black);
}

.page-contact .ledger__grid {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: clamp(24px, 3.6vw, 38px);
  border-top: 1px solid var(--contact-hairline);
}

.page-contact .ledger__block {
  padding: 18px 0;
  border-bottom: 1px solid var(--contact-hairline);
}

.page-contact .ledger__key {
  display: block;
  margin-bottom: 6px;
  font-size: var(--step--2);
  letter-spacing: .14em;
  color: var(--contact-ink-mute);
}

.page-contact .ledger__val {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--black);
  overflow-wrap: anywhere;
}

.page-contact .ledger__val--mono {
  font-family: var(--font-mono);
  letter-spacing: .01em;
}

.page-contact .ledger__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 46em;
  font-size: var(--step--1);
  line-height: 1.9;
  color: rgba(10, 15, 20, .68);
}

.page-contact .ledger__note a {
  color: var(--black);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .ledger__note a:hover {
  border-color: var(--coral);
}

/* ---------- 收束金线 ---------- */
.page-contact .contact-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold) 22%, var(--gold) 78%, transparent);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-contact .contact-list__row {
    grid-template-columns: 116px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 860px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(28px, 4vw, 60px);
  }

  .page-contact .panel-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(26px, 3.6vw, 52px);
  }

  .page-contact .ledger__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ledger__block:nth-child(odd) {
    padding-right: 30px;
    border-right: 1px solid var(--contact-hairline);
  }

  .page-contact .ledger__block:nth-child(even) {
    padding-left: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-panel {
    animation: none;
  }

  .page-contact .channel-switch__tab::after,
  .page-contact .flow__num {
    transition: none;
  }
}
</main>