.page-contact {
  --pc-on-light: #2A3352;
  --pc-on-light-soft: #566080;
  --pc-gap: clamp(18px, 2.6vw, 36px);
}

/* ---------- 通用章节头部 ---------- */
.page-contact .section-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-contact .section-head .lede {
  margin-top: 14px;
  color: var(--pc-on-light-soft);
}

.page-contact .section:not(.section--paper) .section-head .lede {
  color: var(--slate-300);
}

.page-contact .section-title {
  margin: 8px 0 0;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white-050);
}

.page-contact .section--paper .section-title {
  color: var(--ink-950);
}

.page-contact .section--paper .eyebrow {
  color: var(--ink-900);
  opacity: .72;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  padding-top: clamp(30px, 5vw, 76px);
}

.page-contact .contact-intro__head {
  max-width: 24ch;
}

.page-contact .display {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(34px, 6.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--white-050);
}

.page-contact .contact-intro__lede {
  max-width: 58ch;
  margin-top: 20px;
  color: var(--slate-300);
}

.channel-deck {
  margin-top: clamp(34px, 5vw, 72px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 2.6vw, 34px);
  border: 1px solid var(--ink-700);
  border-top-width: 3px;
  border-radius: var(--r-lg);
  background: var(--ink-900);
  transition: transform .38s var(--ease), border-color .38s var(--ease), background-color .38s var(--ease);
}

.channel-card--mail { border-top-color: var(--cyan-400); }
.channel-card--call { border-top-color: var(--orange-500); }
.channel-card--partner { border-top-color: var(--violet-500); }

.channel-card:hover,
.channel-card:focus-within {
  transform: translateY(-6px);
  border-color: var(--cyan-400);
  background: #111941;
}

.channel-card--call:hover,
.channel-card--call:focus-within { border-color: var(--orange-500); }
.channel-card--partner:hover,
.channel-card--partner:focus-within { border-color: var(--violet-500); }

.channel-card__idx {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .16em;
  color: var(--cyan-200);
}

.channel-card--call .channel-card__idx { color: #FFC29E; }
.channel-card--partner .channel-card__idx { color: #C8BCFF; }

.channel-card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--t-lg);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white-050);
}

.channel-card__desc {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.7;
  color: var(--slate-300);
}

.channel-card__meta {
  margin: 4px 0 0;
  padding: 14px 16px;
  border-radius: var(--r-sm);
  background: rgba(8, 13, 31, .72);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
}

.channel-card__meta dt {
  color: var(--cyan-200);
  letter-spacing: .06em;
}

.channel-card__meta dd {
  margin: 0;
  color: var(--white-050);
  letter-spacing: .02em;
}

.channel-card__detail {
  margin: 10px 0 0;
  font-size: var(--t-xs);
  line-height: 1.75;
  color: var(--slate-300);
  border-left: 2px solid var(--ink-700);
  padding-left: 12px;
}

.channel-card__link {
  margin-top: auto;
  padding-top: 8px;
  font-size: var(--t-xs);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--cyan-400);
  text-decoration: none;
}

.channel-card--call .channel-card__link { color: var(--orange-500); }
.channel-card--partner .channel-card__link { color: #B3A5FF; }

.channel-card__link:hover { text-decoration: underline; text-underline-offset: 4px; }

@media (hover: hover) and (min-width: 900px) {
  .channel-card__detail {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    border-left-color: transparent;
    padding-left: 0;
    transition: max-height .4s var(--ease), opacity .3s var(--ease), margin-top .4s var(--ease), padding-left .4s var(--ease), border-left-color .3s var(--ease);
  }
  .channel-card:hover .channel-card__detail,
  .channel-card:focus-within .channel-card__detail {
    max-height: 200px;
    margin-top: 12px;
    opacity: 1;
    padding-left: 12px;
    border-left-color: var(--ink-700);
  }
}

/* ---------- 问题归类 ---------- */
.route-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(8, 13, 31, .13);
  border: 1px solid rgba(8, 13, 31, .13);
  border-radius: var(--r-md);
  overflow: hidden;
}

.route-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--white-050);
}

.route-item__label {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--pill);
  background: var(--ink-950);
  color: var(--cyan-200);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .1em;
}

.route-item__text {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.72;
  color: var(--pc-on-light);
}

.route-item__text a {
  color: #114B66;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.route-item__tag {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(8, 13, 31, .18);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .06em;
  color: var(--violet-500);
}

/* ---------- 联系方式 ---------- */
.reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: clamp(24px, 3vw, 40px);
}

.reach-card {
  position: relative;
  padding: clamp(24px, 3vw, 40px);
  border: 1px solid var(--ink-700);
  border-left-width: 4px;
  border-radius: var(--r-lg);
  background: var(--ink-900);
  overflow: hidden;
}

.reach-card--mail { border-left-color: var(--cyan-400); }
.reach-card--phone { border-left-color: var(--orange-500); }

.reach-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.reach-card__value {
  margin: 14px 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.2vw, 32px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--white-050);
  word-break: break-word;
}

.reach-card--mail .reach-card__value { color: var(--cyan-200); }
.reach-card--phone .reach-card__value { color: #FFB285; }

.reach-card__hint {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.72;
  color: var(--slate-300);
}

.page-contact .note {
  margin-top: clamp(22px, 3vw, 34px);
  font-size: var(--t-xs);
  line-height: 1.8;
  color: var(--slate-300);
}

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

/* ---------- 服务时段 ---------- */
.hours-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 56px);
}

.page-contact .hours-copy .prose {
  margin-top: 16px;
  color: var(--slate-300);
}

.hours-legend {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hours-legend li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .04em;
  color: var(--slate-300);
}

.dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot--lime { background: var(--lime-400); }
.dot--orange { background: var(--orange-500); }
.dot--gray { background: var(--ink-700); }

.hours-figure {
  margin: 0;
  border: 1px solid var(--ink-700);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-900);
}

.hours-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hours-figure .media__caption {
  padding: 14px 18px;
  font-size: var(--t-xs);
  color: var(--slate-300);
  border-top: 1px solid var(--ink-700);
}

/* ---------- 提交准备 ---------- */
.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.checklist__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(16px, 2.4vw, 30px);
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-top: 1px solid var(--ink-700);
}

.checklist__item:last-child {
  border-bottom: 1px solid var(--ink-700);
}

.checklist__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  color: var(--lime-400);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
}

.checklist__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--t-md);
  letter-spacing: -0.01em;
  color: var(--white-050);
}

.checklist__body p {
  margin: 0;
  font-size: var(--t-sm);
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 合作洽谈 ---------- */
.partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 64px);
}

.page-contact .partner-copy .prose {
  margin-top: 16px;
  color: var(--slate-300);
}

.page-contact .partner-copy .prose a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.partner-aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: clamp(24px, 3vw, 36px);
  background: var(--ink-900);
  border-color: var(--ink-700);
}

.partner-aside .card__index {
  color: var(--cyan-200);
}

.partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.partner-list li {
  position: relative;
  padding-left: 22px;
  font-size: var(--t-sm);
  line-height: 1.68;
  color: var(--slate-300);
}

.partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 2px;
  background: var(--cyan-400);
}

.partner-aside .btn {
  align-self: flex-start;
  margin-top: 4px;
}

/* ---------- 来函地址 ---------- */
.letter-wrap {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  isolation: isolate;
}

.letter-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  z-index: 0;
}

.letter-copy {
  position: relative;
  z-index: 1;
  padding: clamp(28px, 5vw, 72px);
  background: linear-gradient(115deg, rgba(8, 13, 31, .95) 0%, rgba(8, 13, 31, .78) 58%, rgba(8, 13, 31, .48) 100%);
}

.page-contact .letter-copy .prose {
  max-width: 54ch;
  margin-top: 16px;
  color: var(--slate-300);
}

.letter-address {
  display: block;
  margin: clamp(22px, 3vw, 32px) 0 clamp(24px, 3vw, 34px);
  padding: 16px 20px;
  border-left: 3px solid var(--orange-500);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(14, 21, 51, .78);
  font-family: var(--font-mono);
  font-style: normal;
  font-size: var(--t-sm);
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--cyan-200);
}

.letter-fold {
  max-width: 62ch;
  border-top: 1px solid var(--ink-700);
}

.letter-fold .fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--lime-400);
}

.letter-fold .fold__mark {
  flex: none;
  width: 14px;
  height: 14px;
  border-right: 2px solid var(--lime-400);
  border-bottom: 2px solid var(--lime-400);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .3s var(--ease);
}

.letter-fold .fold__trigger[aria-expanded="true"] .fold__mark {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.letter-fold .fold__panel {
  padding-bottom: 20px;
}

.letter-fold .fold__panel p {
  margin: 0 0 12px;
  font-size: var(--t-sm);
  line-height: 1.75;
  color: var(--slate-300);
}

.letter-fold .fold__panel p:last-child {
  margin-bottom: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .route-grid { grid-template-columns: repeat(2, 1fr); }
  .reach-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .channel-deck { grid-template-columns: repeat(12, 1fr); align-items: start; }
  .channel-card--mail { grid-column: 1 / span 5; }
  .channel-card--call { grid-column: 6 / span 3; margin-top: 26px; }
  .channel-card--partner { grid-column: 9 / span 4; margin-top: 58px; }

  .hours-grid { grid-template-columns: 5fr 6fr; align-items: center; }
}

@media (min-width: 1000px) {
  .partner-grid { grid-template-columns: 7fr 5fr; align-items: start; }
}

@media (min-width: 1100px) {
  .route-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .checklist__item { grid-template-columns: 1fr; gap: 14px; }
  .checklist__mark { width: 40px; height: 40px; border-radius: 12px; font-size: 13px; }
  .reach-card__value { word-break: break-all; }
}