.page-contact {
  position: relative;
  padding-bottom: clamp(40px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
  padding-bottom: clamp(10px, 2vw, 18px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  z-index: 0;
  isolation: isolate;
  overflow: hidden;
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  background: var(--ink);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: saturate(.72) contrast(1.12);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(115% 85% at 12% 6%, rgba(138, 79, 255, .20), transparent 58%),
    radial-gradient(90% 70% at 92% 88%, rgba(46, 197, 255, .12), transparent 62%),
    linear-gradient(180deg, rgba(8, 9, 12, .48) 0%, rgba(8, 9, 12, .93) 82%, var(--ink) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  padding-top: clamp(38px, 7vw, 84px);
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-contact .contact-hero__lead .eyebrow {
  display: block;
  margin: 0;
}

.page-contact .contact-hero__lead h1 {
  margin: 12px 0 0;
  line-height: 1.02;
  letter-spacing: -.02em;
}

.page-contact .contact-hero__rule {
  display: block;
  width: min(230px, 46%);
  height: 2px;
  margin: 24px 0 22px;
  background: var(--grad-gold);
  box-shadow: 0 0 20px rgba(212, 175, 55, .55);
}

.page-contact .contact-hero__lead .lead {
  max-width: 56ch;
}

.page-contact .contact-hero__pulse {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 26px 0 0;
  padding: 7px 15px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--bone-70);
  background: rgba(8, 9, 12, .55);
}

.page-contact .contact-hero__pulse-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 12px var(--blue);
  animation: contact-pulse 1.9s ease-in-out infinite;
}

@keyframes contact-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .3; transform: scale(.7); }
}

.page-contact .contact-hero__channels {
  display: grid;
  gap: 14px;
}

.page-contact .contact-channel {
  position: relative;
  padding: clamp(18px, 3.4vw, 24px);
  border: 1px solid var(--hair-soft);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(42, 45, 49, .88), rgba(14, 16, 20, .94));
  box-shadow: 0 18px 38px rgba(0, 0, 0, .46);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.page-contact .contact-channel:hover {
  transform: translateY(-3px);
  border-left-color: var(--violet);
  box-shadow: 0 24px 46px rgba(138, 79, 255, .24);
}

.page-contact .contact-channel:nth-child(2):hover {
  border-left-color: var(--blue);
  box-shadow: 0 24px 46px rgba(46, 197, 255, .22);
}

.page-contact .contact-channel:nth-child(3):hover {
  border-left-color: var(--amber);
  box-shadow: 0 24px 46px rgba(255, 138, 61, .20);
}

.page-contact .contact-channel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.page-contact .contact-channel__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.6vw, 17px);
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.55;
  color: var(--gold-light);
  word-break: break-all;
}

.page-contact .contact-channel__value--text {
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--bone);
  word-break: normal;
}

.page-contact .contact-channel .btn {
  padding: 8px 18px;
  font-size: 13px;
}

.page-contact .contact-channel__meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair-soft);
  font-size: 13px;
  line-height: 1.75;
  color: var(--bone-50);
}

/* ---------- 合作入口 ---------- */
.page-contact .contact-coop .section__head {
  max-width: 62ch;
}

.page-contact .contact-coop__list {
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--hair-soft);
}

.page-contact .contact-coop__item {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 3.6vw, 30px) 0;
  border-bottom: 1px solid var(--hair-soft);
  transition: padding-left .3s ease, background-color .3s ease;
}

.page-contact .contact-coop__item:hover {
  padding-left: 14px;
  background: linear-gradient(90deg, rgba(212, 175, 55, .06), transparent 62%);
}

.page-contact .contact-coop__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-contact .contact-coop__item h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(19px, 3.6vw, 24px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--bone);
}

.page-contact .contact-coop__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bone-70);
}

/* ---------- 到访与联络点 ---------- */
.page-contact .contact-visit__grid {
  display: grid;
  gap: clamp(26px, 4.5vw, 50px);
}

.page-contact .contact-visit__media {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--hair-soft);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-contact .contact-visit__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.06);
}

.page-contact .contact-visit__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(212, 175, 55, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, .16) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .7;
}

.page-contact .contact-visit__body h2 {
  margin: 10px 0 18px;
}

.page-contact .contact-visit__body > p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--bone-70);
}

.page-contact .contact-visit__body .contact-list {
  margin: 24px 0;
}

.page-contact .contact-visit__body .contact-list__k {
  color: var(--gold);
}

/* ---------- 响应节奏 ---------- */
.page-contact .contact-sla .section__head {
  max-width: 60ch;
}

.page-contact .contact-sla__track {
  display: grid;
  gap: 2px;
  margin-top: clamp(26px, 4vw, 40px);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .contact-sla__item {
  padding: clamp(22px, 4vw, 34px) clamp(18px, 3.4vw, 28px);
  border-top: 2px solid var(--hair);
  background: linear-gradient(180deg, rgba(42, 45, 49, .62), rgba(14, 16, 20, .82));
}

.page-contact .contact-sla__item:nth-child(1) { border-top-color: var(--blue); }
.page-contact .contact-sla__item:nth-child(2) { border-top-color: var(--gold); }
.page-contact .contact-sla__item:nth-child(3) { border-top-color: var(--amber); }

.page-contact .contact-sla__time {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--blue);
}

.page-contact .contact-sla__item:nth-child(2) .contact-sla__time { color: var(--gold-light); }
.page-contact .contact-sla__item:nth-child(3) .contact-sla__time { color: var(--amber); }

.page-contact .contact-sla__item h3 {
  margin: 12px 0 10px;
  font-family: var(--font-head);
  font-size: clamp(17px, 3.2vw, 21px);
  font-weight: 700;
  color: var(--bone);
}

.page-contact .contact-sla__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--bone-70);
}

/* ---------- 常见联系问题 ---------- */
.page-contact .contact-faq .section__head {
  max-width: 56ch;
}

.page-contact .contact-faq__item {
  border-bottom: 1px solid var(--hair-soft);
}

.page-contact .contact-faq__item:first-of-type {
  margin-top: clamp(22px, 3.6vw, 34px);
  border-top: 1px solid var(--hair-soft);
}

.page-contact .contact-faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(15.5px, 3vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--bone);
  transition: color .25s ease;
}

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

.page-contact .contact-faq__item summary:hover {
  color: var(--gold-light);
}

.page-contact .contact-faq__item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
  transition: transform .25s ease;
}

.page-contact .contact-faq__item[open] summary::after {
  transform: rotate(45deg);
}

.page-contact .contact-faq__body {
  max-width: 70ch;
  padding: 0 0 22px;
}

.page-contact .contact-faq__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--bone-70);
}

/* ---------- 备案与运营信息 ---------- */
.page-contact .contact-legal {
  margin-top: clamp(34px, 6vw, 64px);
  padding-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid var(--hair);
}

.page-contact .contact-legal__row {
  display: grid;
  gap: 18px;
}

.page-contact .contact-legal__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--bone-50);
}

.page-contact .contact-legal__v {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gold-light);
  word-break: break-all;
}

.page-contact .contact-legal__note {
  margin: 26px 0 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--bone-50);
}

.page-contact .contact-legal__note a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: rgba(46, 197, 255, .4);
  text-underline-offset: 3px;
}

.page-contact .contact-legal__note a:hover {
  color: var(--gold-light);
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-legal__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-contact .contact-coop__item {
    grid-template-columns: 62px minmax(0, 1fr);
    column-gap: 22px;
    align-items: start;
  }

  .page-contact .contact-coop__item h3,
  .page-contact .contact-coop__item p {
    grid-column: 2;
  }

  .page-contact .contact-coop__item p {
    margin-top: 8px;
  }
}

@media (min-width: 860px) {
  .page-contact .contact-sla__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .contact-visit__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(40px, 5vw, 72px);
  }

  .page-contact .contact-coop__item {
    grid-template-columns: 72px minmax(150px, 1fr) minmax(0, 2fr);
    align-items: baseline;
  }

  .page-contact .contact-coop__item h3,
  .page-contact .contact-coop__item p {
    grid-column: auto;
  }

  .page-contact .contact-coop__item p {
    margin-top: 0;
  }

  .page-contact .contact-legal__row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-contact .contact-channel,
  .page-contact .contact-coop__item,
  .page-contact .contact-faq__item summary::after {
    transition: none;
  }
}