.page-contact {
  --pc-shadow: 6px 6px 0 0 rgba(7, 11, 24, .9);
  --pc-shadow-hot: 6px 6px 0 0 rgba(168, 85, 247, .45);
  --pc-hair: 2px solid var(--c-line);
}

/* ── 坐标索引条 ───────────────────────────── */
.page-contact .pc-coordbar {
  margin: clamp(18px, 3vw, 28px) 0 0;
}

/* ── A0 首屏 ──────────────────────────────── */
.page-contact .pc-open {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: clamp(18px, 3vw, 30px);
  padding: clamp(38px, 7vw, 82px) 0 clamp(46px, 8vw, 98px);
  background:
    radial-gradient(120% 90% at 86% 0%, rgba(168, 85, 247, .22), transparent 62%),
    linear-gradient(170deg, var(--c-deep) 0%, var(--c-void) 64%);
  border-top: var(--pc-hair);
  border-bottom: var(--pc-hair);
}

.page-contact .pc-open::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(147, 162, 196, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 162, 196, .09) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: linear-gradient(140deg, #000 8%, transparent 74%);
  mask-image: linear-gradient(140deg, #000 8%, transparent 74%);
}

.page-contact .pc-open::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -34%;
  right: -16%;
  width: 56%;
  height: 168%;
  pointer-events: none;
  transform: rotate(11deg);
  background: linear-gradient(205deg, rgba(168, 85, 247, .30), rgba(34, 211, 238, .14) 52%, transparent 76%);
}

.page-contact .pc-open .arc-wrap {
  position: relative;
  z-index: 1;
}

.page-contact .pc-open__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
  align-items: start;
}

.page-contact .pc-open__kicker {
  margin: 0 0 12px;
  font-family: var(--f-index);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-contact .pc-open__title {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(28px, 5.6vw, 50px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--c-ivory);
  text-shadow: 0 0 32px rgba(168, 85, 247, .28);
}

.page-contact .pc-open__lead {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 52ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-contact .pc-open__facts {
  display: grid;
  grid-template-columns: 1fr;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  border-top: var(--pc-hair);
}

.page-contact .pc-open__fact {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 2px solid var(--c-line-soft);
}

.page-contact .pc-open__fact dt {
  min-width: 8ch;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-contact .pc-open__fact dd {
  margin: 0;
  font-size: 15px;
  color: var(--c-ivory);
}

.page-contact .pc-open__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 36px);
}

.page-contact .pc-open__figure {
  margin: 0;
  border: var(--pc-hair);
  box-shadow: var(--hard-violet);
  background: var(--c-void);
}

/* ── 通用区块标题 ─────────────────────────── */
.page-contact .pc-head {
  max-width: 70ch;
}

.page-contact .pc-head__code {
  margin: 0 0 10px;
  font-family: var(--f-index);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--c-violet);
}

.page-contact .pc-head__title {
  margin: 0;
  font-size: clamp(24px, 4.2vw, 42px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.012em;
  color: var(--c-ivory);
}

.page-contact .pc-head__title::after {
  content: "";
  display: block;
  width: 62px;
  height: 3px;
  margin-top: 16px;
  background: linear-gradient(90deg, var(--c-violet), var(--c-cyan));
}

.page-contact .pc-head__lead {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ── 图片容器 ─────────────────────────────── */
.page-contact .pc-figure {
  position: relative;
  overflow: hidden;
  background: var(--c-deep);
}

.page-contact .pc-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-contact .pc-figure__cap {
  padding: 10px 14px 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-mist);
  border-top: 2px solid var(--c-line-soft);
  background: rgba(7, 11, 24, .72);
}

/* ── A1 三类合作 ──────────────────────────── */
.page-contact .pc-tracks {
  padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 76px);
}

.page-contact .pc-tracks__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 26px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .pc-track {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 3vw, 28px);
  background: var(--c-deep);
  border: var(--pc-hair);
  box-shadow: var(--pc-shadow);
  transition: transform var(--t-mid) ease, border-color var(--t-mid) ease, box-shadow var(--t-mid) ease;
}

.page-contact .pc-track::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--c-violet);
}

.page-contact .pc-track:hover,
.page-contact .pc-track:focus-within {
  transform: translateY(-4px);
  border-color: var(--c-lilac);
  box-shadow: var(--pc-shadow-hot);
}

.page-contact .pc-track--content::before { background: var(--c-violet); }
.page-contact .pc-track--channel::before { background: var(--c-cyan); }

.page-contact .pc-track--media {
  background: linear-gradient(180deg, rgba(122, 30, 60, .55), rgba(7, 11, 24, .96));
  border-color: rgba(196, 181, 253, .30);
}

.page-contact .pc-track--media::before { background: var(--c-red); }

.page-contact .pc-track__code {
  margin: 0;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-mist);
}

.page-contact .pc-track__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 23px);
  font-weight: 700;
  color: var(--c-ivory);
}

.page-contact .pc-track__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .pc-track__list {
  list-style: none;
  margin: 2px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.page-contact .pc-track__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-ivory);
}

.page-contact .pc-track__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--c-cyan);
  transform: rotate(45deg);
}

.page-contact .pc-track--media .pc-track__list li::before { background: var(--c-gold); }

.page-contact .pc-track__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--c-line-soft);
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .1em;
  line-height: 1.7;
  color: var(--c-lilac);
}

/* ── A2 四步对接 ──────────────────────────── */
.page-contact .pc-steps {
  padding: clamp(42px, 6.5vw, 82px) 0 clamp(46px, 7vw, 90px);
  background: linear-gradient(180deg, rgba(11, 26, 34, .9), rgba(7, 11, 24, 0));
  border-top: var(--pc-hair);
  border-bottom: var(--pc-hair);
}

.page-contact .pc-steps__list {
  position: relative;
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
}

.page-contact .pc-steps__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), var(--c-violet) 62%, transparent);
}

.page-contact .pc-step {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) 42px;
}

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

.page-contact .pc-step::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 5px;
  width: 18px;
  height: 18px;
  background: var(--c-void);
  border: 2px solid var(--c-cyan);
  animation: pc-pulse 4s ease-in-out infinite;
}

.page-contact .pc-step__num {
  margin: 0 0 6px;
  font-family: var(--f-index);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-contact .pc-step__title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--c-ivory);
}

.page-contact .pc-step__text {
  margin: 8px 0 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-contact .pc-step__expect {
  display: inline-block;
  margin: 12px 0 0;
  padding: 4px 10px;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-mint);
  border: 1px solid rgba(74, 222, 128, .42);
}

@keyframes pc-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, .48); }
  50% { box-shadow: 0 0 0 7px rgba(34, 211, 238, 0); }
}

/* ── A3 联系渠道 ──────────────────────────── */
.page-contact .pc-channels {
  padding: clamp(46px, 7vw, 88px) 0;
  background:
    radial-gradient(90% 70% at 12% 0%, rgba(122, 30, 60, .40), transparent 66%),
    linear-gradient(180deg, rgba(11, 26, 34, .6), rgba(7, 11, 24, 0));
}

.page-contact .pc-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .pc-channels__cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .pc-channel {
  padding: clamp(18px, 3vw, 26px);
  background: rgba(11, 26, 34, .95);
  border: var(--pc-hair);
  box-shadow: 5px 5px 0 0 rgba(7, 11, 24, .88);
  transition: border-color var(--t-mid) ease, transform var(--t-mid) ease;
}

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  border-color: var(--c-lilac);
  transform: translateX(4px);
}

.page-contact .pc-channel--mail {
  border-left: 4px solid var(--c-violet);
}

.page-contact .pc-channel--phone {
  border-left: 4px solid var(--c-gold);
}

.page-contact .pc-channel--addr {
  border-left: 4px solid var(--c-cyan);
}

.page-contact .pc-channel__code {
  margin: 0 0 8px;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--c-mist);
}

.page-contact .pc-channel--mail .pc-channel__code { color: var(--c-lilac); }
.page-contact .pc-channel--phone .pc-channel__code { color: var(--c-gold); }

.page-contact .pc-channel__label {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-contact .pc-channel__value {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(17px, 2.6vw, 23px);
  letter-spacing: .01em;
  line-height: 1.45;
  color: var(--c-ivory);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel__value--mail {
  color: var(--c-lilac);
}

.page-contact .pc-channel__value--num {
  color: var(--c-gold);
}

.page-contact .pc-channel__value--addr {
  font-family: var(--f-body);
  font-size: clamp(15.5px, 2vw, 17px);
  line-height: 1.7;
  color: var(--c-ivory);
}

.page-contact .pc-channel__note {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .pc-channels__hours {
  margin: 4px 0 0;
  padding: 14px 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-ivory);
  background: rgba(34, 211, 238, .08);
  border: 2px solid rgba(34, 211, 238, .35);
}

.page-contact .pc-channels__hours-label {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 8px;
  font-family: var(--f-index);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-void);
  background: var(--c-cyan);
}

.page-contact .pc-channels__figure {
  margin: 0;
  border: var(--pc-hair);
  box-shadow: var(--hard-cyan);
}

/* ── A4 邮件提速 ──────────────────────────── */
.page-contact .pc-mailtips {
  padding: clamp(44px, 7vw, 86px) 0 clamp(40px, 6vw, 72px);
  border-top: var(--pc-hair);
}

.page-contact .pc-mailtips__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 38px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-contact .pc-mailtips__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-contact .pc-mailtips__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 16px;
  padding: 18px 0;
  border-bottom: 2px solid var(--c-line-soft);
}

.page-contact .pc-mailtips__item:first-child {
  border-top: 2px solid var(--c-line-soft);
}

.page-contact .pc-mailtips__num {
  font-family: var(--f-index);
  font-size: 13px;
  letter-spacing: .14em;
  line-height: 1.6;
  color: var(--c-violet);
}

.page-contact .pc-mailtips__body h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--c-ivory);
}

.page-contact .pc-mailtips__body p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--c-mist);
}

.page-contact .pc-mailtips__aside {
  align-self: start;
  padding: clamp(20px, 3vw, 26px);
  background: linear-gradient(180deg, rgba(122, 30, 60, .45), rgba(11, 26, 34, .96));
  border: var(--pc-hair);
  box-shadow: var(--pc-shadow);
}

.page-contact .pc-mailtips__aside-code {
  margin: 0 0 12px;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-red);
}

.page-contact .pc-mailtips__aside-text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ivory);
}

.page-contact .pc-mailtips__link {
  display: inline-block;
  position: relative;
  margin-top: 16px;
  font-size: 14.5px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .45);
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-contact .pc-mailtips__link:hover,
.page-contact .pc-mailtips__link:focus-visible {
  color: var(--c-ivory);
  border-color: var(--c-ivory);
}

/* ── 下一站路线条 ─────────────────────────── */
.page-contact .pc-next {
  margin: clamp(32px, 5vw, 56px) 0 clamp(48px, 7vw, 88px);
  padding: clamp(20px, 3vw, 28px);
  border: var(--pc-hair);
  background: rgba(11, 26, 34, .8);
}

.page-contact .pc-next__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-contact .pc-next__list li {
  border-bottom: 2px solid var(--c-line-soft);
}

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

.page-contact .pc-next__code {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--f-index);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-violet);
}

.page-contact .pc-next__label {
  display: inline;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ivory);
}

.page-contact .pc-next .arc-next__link {
  display: block;
  padding: 12px 0;
  text-decoration: none;
  transition: color var(--t-fast) ease, padding-left var(--t-fast) ease;
}

.page-contact .pc-next .arc-next__link:hover,
.page-contact .pc-next .arc-next__link:focus-visible {
  padding-left: 8px;
}

.page-contact .pc-next .arc-next__link:hover .pc-next__label,
.page-contact .pc-next .arc-next__link:focus-visible .pc-next__label {
  color: var(--c-cyan);
}

/* ── 桌面栅格 ─────────────────────────────── */
@media (min-width: 700px) {
  .page-contact .pc-open__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 0;
    gap: 0 24px;
  }

  .page-contact .pc-open__fact {
    display: block;
    padding: 0;
    border-top: var(--pc-hair);
    border-bottom: 0;
    padding-top: 12px;
  }

  .page-contact .pc-open__fact dt {
    display: block;
    margin-bottom: 6px;
  }

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

  .page-contact .pc-mailtips__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (min-width: 920px) {
  .page-contact .pc-open__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-contact .pc-tracks__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: clamp(20px, 2.6vw, 30px);
    align-items: start;
  }

  .page-contact .pc-track--content {
    grid-column: 1 / span 5;
  }

  .page-contact .pc-track--channel {
    grid-column: 6 / span 4;
    margin-top: 46px;
  }

  .page-contact .pc-track--media {
    grid-column: 10 / span 3;
    margin-top: 92px;
  }

  .page-contact .pc-channels__grid {
    grid-template-columns: 8fr 4fr;
    gap: clamp(28px, 4vw, 44px);
    align-items: start;
  }

  .page-contact .pc-steps__list {
    max-width: 900px;
  }

  .page-contact .pc-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 26px;
  }

  .page-contact .pc-next__list li {
    border-bottom: 0;
    border-top: var(--pc-hair);
  }
}

@media (min-width: 1180px) {
  .page-contact .pc-open__title {
    font-size: 56px;
  }

  .page-contact .pc-head__title {
    font-size: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-step::before {
    animation: none;
  }

  .page-contact .pc-track,
  .page-contact .pc-channel,
  .page-contact .pc-next .arc-next__link,
  .page-contact .pc-mailtips__link {
    transition: none;
  }
}