.page-contact {
  background:
    radial-gradient(120% 60% at 78% -10%, rgba(53, 240, 138, .10), transparent 62%),
    radial-gradient(90% 50% at 8% 4%, rgba(111, 195, 255, .10), transparent 66%),
    var(--abyss-900);
  color: var(--frost-050);
  padding-block: clamp(92px, 13vw, 148px) clamp(56px, 9vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumbs {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--slate-400);
}

.page-contact .breadcrumb a {
  color: var(--slate-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--mint-200);
  border-bottom-color: var(--line-tint);
}

.page-contact .breadcrumb-sep {
  color: var(--slate-400);
  opacity: .55;
}

/* ---------- 首屏文字 ---------- */
.page-contact .contact-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--neon-400);
  margin-bottom: 18px;
}

.page-contact .contact-title {
  font-family: var(--font-body);
  font-weight: 900;
  font-size: clamp(29px, 8.2vw, 58px);
  line-height: 1.14;
  letter-spacing: -.02em;
  max-width: 15em;
  color: var(--frost-050);
}

.page-contact .contact-lede {
  margin-top: 20px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 横向信息带 ---------- */
.page-contact .contact-band {
  margin-top: clamp(32px, 6vw, 56px);
}

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

.page-contact .channel {
  padding: 24px 0;
}

.page-contact .channel + .channel {
  border-top: 1px solid var(--line-tint);
}

.page-contact .channel__label {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate-400);
  margin-bottom: 10px;
}

.page-contact .channel__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(19px, 5.2vw, 27px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--frost-050);
  overflow-wrap: anywhere;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-tint);
  display: inline-block;
  transition: border-color .3s var(--ease), color .3s var(--ease);
}

.page-contact .channel:hover .channel__value {
  border-bottom-color: var(--mint-200);
}

.page-contact .channel__value--amber {
  color: var(--amber-400);
}

.page-contact .channel__value--text {
  font-family: var(--font-body);
  font-size: clamp(17px, 4.4vw, 21px);
  font-weight: 500;
  letter-spacing: 0;
}

.page-contact .channel__hint {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-400);
  max-width: 34em;
}

/* ---------- 页头氛围图 ---------- */
.page-contact .contact-figure {
  margin-top: clamp(26px, 4vw, 44px);
}

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

/* ---------- 通用章节 ---------- */
.page-contact .contact-section {
  margin-top: clamp(52px, 9vw, 100px);
}

.page-contact .sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  border-top: 1px solid var(--line-tint);
  padding-top: clamp(20px, 3vw, 28px);
}

.page-contact .sec-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--neon-400);
  padding-top: 7px;
}

.page-contact .sec-title {
  font-size: clamp(22px, 5.4vw, 34px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -.015em;
  color: var(--frost-050);
}

.page-contact .sec-sub {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate-400);
  max-width: 56ch;
}

.page-contact .sec-foot {
  margin-top: 22px;
  padding-left: 15px;
  border-left: 2px solid rgba(53, 240, 138, .35);
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-400);
  max-width: 62ch;
}

/* ---------- 处理顺序 ---------- */
.page-contact .order-list {
  margin-top: 26px;
  list-style: none;
}

.page-contact .order-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line-tint);
}

.page-contact .order-item:last-child {
  border-bottom: 1px solid var(--line-tint);
}

.page-contact .order-rank {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--amber-400);
  line-height: 1.2;
}

.page-contact .order-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--frost-050);
  margin-bottom: 8px;
}

.page-contact .order-desc {
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate-400);
  max-width: 60ch;
}

/* ---------- 数据纠错 ---------- */
.page-contact .fix-grid {
  margin-top: 26px;
  display: grid;
  gap: 16px;
}

.page-contact .fix-step {
  padding: 20px 18px;
  border: 1px solid var(--line-tint);
  border-radius: var(--radius-card);
  background: linear-gradient(170deg, rgba(18, 41, 77, .62), rgba(10, 23, 48, .34));
}

.page-contact .fix-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sky-300);
  margin-bottom: 10px;
}

.page-contact .fix-step__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--frost-050);
  margin-bottom: 8px;
}

.page-contact .fix-step__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-400);
  overflow-wrap: anywhere;
}

/* ---------- 两栏布局 ---------- */
.page-contact .contact-split {
  margin-top: 28px;
  display: grid;
  gap: 26px;
}

.page-contact .contact-split--coop {
  align-items: start;
}

/* ---------- 合作清单 ---------- */
.page-contact .coop-list {
  list-style: none;
}

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

.page-contact .coop-item:last-child {
  border-bottom: 1px solid var(--line-tint);
}

.page-contact .coop-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--frost-050);
  margin-bottom: 8px;
}

.page-contact .coop-desc {
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate-400);
  max-width: 46ch;
}

.page-contact .coop-need {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  line-height: 1.7;
  color: var(--mint-200);
}

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

.page-contact .coop-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 表单 ---------- */
.page-contact .msg-panel {
  border: 1px solid var(--line-tint);
  border-radius: var(--radius-card);
  padding: clamp(20px, 4vw, 32px);
  background: linear-gradient(180deg, rgba(18, 41, 77, .60), rgba(10, 23, 48, .40));
}

.page-contact .field {
  margin-bottom: 18px;
}

.page-contact .field__label {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--slate-400);
  margin-bottom: 8px;
}

.page-contact .field__input {
  width: 100%;
  box-sizing: border-box;
  padding: 13px 15px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--frost-050);
  background: rgba(5, 11, 26, .55);
  border: 1px solid var(--line-tint);
  border-radius: 12px;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}

.page-contact .field__input::placeholder {
  color: rgba(132, 151, 176, .72);
}

.page-contact .field__input:focus {
  outline: none;
  border-color: var(--neon-400);
  background: rgba(5, 11, 26, .82);
  box-shadow: 0 0 0 3px rgba(53, 240, 138, .14);
}

.page-contact .field__input--area {
  min-height: 132px;
  resize: vertical;
  line-height: 1.75;
}

.page-contact select.field__input option {
  background: var(--navy-800);
  color: var(--frost-050);
}

.page-contact .msg-submit {
  width: 100%;
  margin-top: 4px;
}

.page-contact .msg-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- 表单旁注 ---------- */
.page-contact .msg-aside {
  border-top: 1px solid var(--line-tint);
  padding-top: 20px;
}

.page-contact .aside-title {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--neon-400);
  margin-bottom: 16px;
}

.page-contact .aside-list {
  list-style: none;
}

.page-contact .aside-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 14px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--slate-400);
}

.page-contact .aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 1px;
  background: var(--sky-300);
}

.page-contact .aside-foot {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-contact .aside-foot a {
  color: var(--mint-200);
  text-decoration: none;
  border-bottom: 1px solid rgba(166, 255, 212, .35);
  transition: border-color .3s var(--ease);
}

.page-contact .aside-foot a:hover,
.page-contact .aside-foot a:focus-visible {
  border-bottom-color: var(--mint-200);
}

/* ---------- 页尾次级入口 ---------- */
.page-contact .contact-tail {
  margin-top: clamp(48px, 8vw, 88px);
  padding-top: clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line-tint);
}

.page-contact .tail-line {
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-400);
  margin-bottom: 18px;
}

.page-contact .tail-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-contact .fix-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .msg-submit {
    width: auto;
    min-width: 180px;
  }
}

@media (min-width: 880px) {
  .page-contact .contact-band__inner {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .channel {
    padding: 32px 30px;
  }

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

  .page-contact .channel:last-child {
    padding-right: 0;
  }

  .page-contact .channel + .channel {
    border-top: 0;
    border-left: 1px solid var(--line-tint);
  }

  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 40px;
    align-items: start;
  }

  .page-contact .contact-split--coop {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    gap: 44px;
  }

  .page-contact .msg-aside {
    border-top: 0;
    padding-top: 4px;
    border-left: 1px solid var(--line-tint);
    padding-left: 28px;
  }
}

@media (min-width: 1120px) {
  .page-contact .channel {
    padding: 36px 36px;
  }

  .page-contact .fix-step {
    padding: 24px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel__value,
  .page-contact .field__input,
  .page-contact .breadcrumb a,
  .page-contact .aside-foot a {
    transition: none;
  }
}