.page-contact {
  background: var(--c-night);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-contact .wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--c-signal);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--bar-h) + 40px) 0 52px;
  background:
    repeating-linear-gradient(90deg, rgba(111, 217, 230, 0.055) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(111, 217, 230, 0.055) 0 1px, transparent 1px 72px),
    radial-gradient(120% 90% at 10% 0%, rgba(30, 59, 110, 0.95) 0%, rgba(10, 23, 51, 0) 62%),
    linear-gradient(180deg, var(--c-deep) 0%, var(--c-night) 100%);
}

.page-contact .crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  color: var(--ink-mute);
  margin-bottom: 26px;
}

.page-contact .crumb__link {
  color: var(--c-glacier);
  text-decoration: none;
}

.page-contact .crumb__link:hover {
  color: var(--c-snow);
}

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

.page-contact .crumb__current {
  color: var(--ink-soft);
}

.page-contact .contact-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  color: var(--c-lava);
}

.page-contact .contact-hero__title {
  margin: 0 0 18px;
  font-size: clamp(30px, 7.2vw, 62px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-snow);
}

.page-contact .contact-hero__title span {
  display: block;
  font-weight: 400;
  color: var(--c-glacier);
}

.page-contact .contact-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .hero-chips {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .hero-chip {
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 37, 74, 0.6);
  font-family: var(--font-num);
  font-size: var(--step-1);
  color: var(--ink-soft);
}

.page-contact .hero-chip--lava {
  border-color: rgba(255, 107, 44, 0.5);
  color: var(--c-lava);
}

.page-contact .hero-chip--signal {
  border-color: rgba(53, 208, 138, 0.45);
  color: var(--c-signal);
}

/* ---------- 面板通用 ---------- */

.page-contact .panel-block {
  padding: 52px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .panel-kicker {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.18em;
  color: var(--c-lava);
}

.page-contact .panel-title {
  margin: 0 0 14px;
  font-size: clamp(24px, 5vw, var(--step-6));
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-snow);
}

.page-contact .panel-lead {
  max-width: 62ch;
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .panel-lead a,
.page-contact .dir-card__text a,
.page-contact .channel__note a,
.page-contact .faq__a a {
  color: var(--c-glacier);
  text-underline-offset: 3px;
}

/* ---------- 合作方向 ---------- */

.page-contact .dir-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.page-contact .dir-card {
  position: relative;
  padding: 24px 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--glass);
  backdrop-filter: blur(8px);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .dir-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  border-radius: var(--radius-m) var(--radius-m) 0 0;
  background: var(--c-lava);
}

.page-contact .dir-card--signal::before {
  background: var(--c-signal);
}

.page-contact .dir-card--glacier::before {
  background: var(--c-glacier);
}

.page-contact .dir-card--amber::before {
  background: var(--c-amber);
}

.page-contact .dir-card:hover,
.page-contact .dir-card:focus-within {
  transform: translateY(-2px);
  background: var(--glass-hi);
}

.page-contact .dir-card__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  color: var(--ink-mute);
}

.page-contact .dir-card__title {
  margin: 0 0 10px;
  font-size: var(--step-4);
  font-weight: 700;
  color: var(--c-snow);
}

.page-contact .dir-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .dir-card__fit {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-num);
  font-size: var(--step-1);
  line-height: 1.6;
  color: var(--c-glacier);
}

/* ---------- 图片 ---------- */

.page-contact .contact-figure {
  margin: 34px 0 0;
}

.page-contact .contact-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  object-fit: cover;
}

.page-contact .contact-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  line-height: 1.6;
  color: var(--ink-mute);
}

/* ---------- 合作流程 ---------- */

.page-contact .flow {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-contact .flow__step {
  padding-top: 18px;
  border-top: 2px solid rgba(111, 217, 230, 0.32);
}

.page-contact .flow__step--accent {
  border-top-color: var(--c-lava);
}

.page-contact .flow__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-4);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--c-glacier);
}

.page-contact .flow__step--accent .flow__num {
  color: var(--c-lava);
}

.page-contact .flow__title {
  margin: 12px 0 8px;
  font-size: var(--step-4);
  font-weight: 700;
  color: var(--c-snow);
}

.page-contact .flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .flow__time {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  color: var(--c-amber);
}

/* ---------- 联系渠道 ---------- */

.page-contact .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 32px;
}

.page-contact .channel-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .channel {
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .channel:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .channel__k {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  color: var(--c-glacier);
}

.page-contact .channel__v {
  display: block;
  font-size: clamp(18px, 4.6vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-snow);
  overflow-wrap: anywhere;
}

.page-contact .channel__v--mail {
  font-family: var(--font-num);
  color: var(--c-lava);
}

.page-contact .channel__v--lava {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--c-lava);
}

.page-contact .channel__note {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .channel-tip {
  margin: 26px 0 0;
  padding: 14px 18px;
  border-left: 3px solid var(--c-amber);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(255, 194, 75, 0.08);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-contact .contact-card {
  padding: 24px 22px 26px;
  border-radius: var(--radius-l);
  background: var(--c-snow);
  color: var(--ink-invert);
  box-shadow: 0 28px 56px -32px rgba(0, 0, 0, 0.78);
}

.page-contact .contact-card__kicker {
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.16em;
  color: #B4481A;
}

.page-contact .sla {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-contact .sla li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: #2A3D5C;
}

.page-contact .sla li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-signal);
}

/* ---------- 常见问题 ---------- */

.page-contact .faq {
  display: grid;
  gap: 10px;
  margin-top: 30px;
}

.page-contact .faq__item {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--glass);
  transition: background var(--dur) var(--ease);
}

.page-contact .faq__item[open] {
  background: var(--glass-hi);
}

.page-contact .faq__q {
  position: relative;
  padding: 17px 52px 17px 20px;
  list-style: none;
  cursor: pointer;
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1.6;
  color: var(--c-snow);
}

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

.page-contact .faq__q::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-size: var(--step-4);
  line-height: 1;
  color: var(--c-lava);
}

.page-contact .faq__item[open] .faq__q::after {
  content: "–";
}

.page-contact .faq__a {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 尾部信息条 ---------- */

.page-contact .stamp-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  padding: 26px 0 44px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-num);
  font-size: var(--step-1);
  color: var(--ink-mute);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-contact .panel-block {
    padding: 76px 0;
  }

  .page-contact .dir-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .flow {
    gap: 28px;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero {
    padding: calc(var(--bar-h) + 64px) 0 76px;
  }

  .page-contact .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .flow__step {
    padding-right: 8px;
  }

  .page-contact .split {
    grid-template-columns: minmax(0, 62fr) minmax(0, 34fr);
    gap: 4%;
    align-items: start;
  }

  .page-contact .split__side {
    position: sticky;
    top: calc(var(--bar-h-slim) + 24px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-card,
  .page-contact .faq__item {
    transition: none;
  }

  .page-contact .dir-card:hover,
  .page-contact .dir-card:focus-within {
    transform: none;
  }
}