.page-contact {
  --pc-key-w: 132px;
  --pc-pad: clamp(16px, 4vw, 32px);
  background: var(--ink-900);
  color: var(--slate-100);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 5vw, 60px);
  background: var(--ink-950);
  border-bottom: 1px solid var(--line-700);
}

.page-contact .pc-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: saturate(0.55) contrast(1.05);
  pointer-events: none;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 8% 0%, rgba(22, 115, 255, 0.22), transparent 58%),
    linear-gradient(180deg, rgba(6, 16, 32, 0.55), rgba(6, 16, 32, 0.94));
  pointer-events: none;
}

.page-contact .pc-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .pc-frame {
  position: relative;
  padding: clamp(24px, 4vw, 48px) var(--pc-pad) clamp(28px, 4vw, 52px);
  border: 1px solid var(--line-700);
  background: rgba(10, 26, 47, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-contact .pc-frame::before,
.page-contact .pc-frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--mint-400);
}

.page-contact .pc-frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .pc-frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-contact .pc-frame__code,
.page-contact .pc-frame__stamp {
  position: absolute;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--slate-400);
}

.page-contact .pc-frame__code {
  top: 10px;
  left: var(--pc-pad);
}

.page-contact .pc-frame__stamp {
  right: var(--pc-pad);
  bottom: 12px;
  color: var(--mint-400);
}

.page-contact .pc-frame .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: clamp(18px, 3vw, 30px) 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--slate-400);
}

.page-contact .pc-crumb-sep {
  color: var(--line-700);
}

.page-contact .pc-frame .eyebrow {
  margin: 0 0 10px;
}

.page-contact h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.75rem, 5.6vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 22em;
  color: var(--slate-100);
}

.page-contact .pc-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--slate-100);
}

/* ---------- 主体骨架 ---------- */
.page-contact .pc-body {
  padding: clamp(32px, 5vw, 56px) 0 clamp(48px, 6vw, 76px);
  gap: clamp(20px, 3vw, 40px);
}

.page-contact .pc-rail {
  padding: 16px;
  border-radius: var(--radius-md);
}

.page-contact .anchor-rail__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .anchor-rail__link {
  display: block;
  padding: 9px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
  text-decoration: none;
  border-left: 2px solid var(--line-700);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .anchor-rail__link:hover,
.page-contact .anchor-rail__link:focus-visible {
  color: var(--slate-100);
}

.page-contact .anchor-rail__link[aria-current="true"] {
  color: var(--mint-400);
  border-left-color: var(--mint-400);
}

.page-contact .pc-read {
  min-width: 0;
}

.page-contact .pc-read > .section + .section {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--line-700);
}

.page-contact h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.375rem, 3.6vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--slate-100);
}

.page-contact .pc-lead {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--slate-100);
}

.page-contact .pc-read p {
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.8;
}

.page-contact .pc-read p + p {
  margin-top: 14px;
}

/* ---------- 联络信息等宽清单 ---------- */
.page-contact .pc-list {
  margin: 0 0 24px;
  border-top: 1px solid var(--line-700);
}

.page-contact .pc-list__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .pc-list__key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-400);
}

.page-contact .pc-list__val {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--slate-100);
}

.page-contact .pc-list__val--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

/* ---------- 邮件标题结构 ---------- */
.page-contact .pc-mailbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 14px 16px;
  background: var(--ink-800);
  border-left: 3px solid var(--brand-500);
  border-radius: var(--radius-sm);
  font-size: var(--fs-14);
}

.page-contact .pc-mailbar__label {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--slate-400);
}

.page-contact .pc-mailbar__part {
  padding: 4px 10px;
  border: 1px solid var(--line-700);
  border-radius: 999px;
  color: var(--slate-100);
  font-size: var(--fs-12);
}

.page-contact .pc-mailbar__part--accent {
  color: var(--mint-400);
  border-color: var(--mint-400);
}

.page-contact .pc-mailbar__sep {
  color: var(--slate-400);
  font-size: var(--fs-12);
}

/* ---------- 分段切换 ---------- */
.page-contact .pc-seg {
  display: block;
  margin-top: 6px;
}

.page-contact .segmented__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.page-contact .segmented__btn {
  appearance: none;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--slate-400);
  background: var(--ink-950);
  border: 1px solid var(--line-700);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .segmented__btn:hover {
  color: var(--slate-100);
  border-color: var(--brand-500);
}

.page-contact .segmented__btn[aria-selected="true"] {
  color: var(--ink-950);
  background: var(--mint-400);
  border-color: var(--mint-400);
}

.page-contact .segmented__btn:focus-visible {
  outline: 2px solid var(--mint-400);
  outline-offset: 2px;
}

.page-contact .segmented__panel {
  padding: 18px var(--pc-pad);
  background: var(--ink-800);
  border-radius: var(--radius-md);
}

.page-contact .segmented__panel[hidden] {
  display: none;
}

.page-contact .pc-example {
  margin: 0 0 10px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--slate-100);
  overflow-wrap: anywhere;
}

.page-contact .pc-example__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 记录字段模板 ---------- */
.page-contact .pc-fields {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-700);
}

.page-contact .pc-fields__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .pc-fields__idx {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--brand-300);
}

.page-contact .pc-fields__name {
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--slate-100);
}

.page-contact .pc-fields__hint {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 提交类型 ---------- */
.page-contact .pc-types {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-700);
}

.page-contact .pc-types__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .pc-types__idx {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--brand-300);
}

.page-contact .pc-types__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--slate-100);
}

.page-contact .pc-types__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 流程 ---------- */
.page-contact .pc-flow-fig {
  margin: 0 0 24px;
}

.page-contact .media-frame {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .media-figure__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate-400);
}

.page-contact .pc-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-contact .pc-flow__step {
  position: relative;
  padding: 18px 16px 20px;
  background: var(--ink-800);
  border-top: 2px solid var(--line-700);
  border-radius: var(--radius-sm);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .pc-flow__step:hover,
.page-contact .pc-flow__step:focus-within {
  border-top-color: var(--mint-400);
  background: var(--ink-900);
}

.page-contact .pc-flow__idx {
  display: block;
  margin-bottom: 10px;
  font-size: var(--fs-28);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--brand-500);
}

.page-contact .pc-flow__name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--slate-100);
}

.page-contact .pc-flow__desc {
  margin: 0 0 12px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-100);
}

.page-contact .pc-flow__cycle {
  display: block;
  padding-top: 10px;
  border-top: 1px dashed var(--line-700);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
  opacity: 0.75;
  transition: opacity 0.18s var(--ease), color 0.18s var(--ease);
}

.page-contact .pc-flow__step:hover .pc-flow__cycle,
.page-contact .pc-flow__step:focus-within .pc-flow__cycle {
  opacity: 1;
  color: var(--mint-400);
}

/* ---------- 提示条 ---------- */
.page-contact .notice {
  margin: 20px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
}

/* ---------- 页尾元信息条 ---------- */
.page-contact .pc-meta-bar {
  border-top: 1px solid var(--line-700);
  background: var(--ink-950);
}

.page-contact .pc-meta-bar__inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 0;
}

.page-contact .pc-meta-bar__item {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--slate-400);
}

.page-contact .pc-meta-bar__link {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--brand-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .pc-meta-bar__link:hover {
  color: var(--mint-400);
  border-bottom-color: var(--mint-400);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-list__row {
    grid-template-columns: var(--pc-key-w) minmax(0, 1fr);
    gap: 4px 24px;
    align-items: baseline;
  }

  .page-contact .pc-fields__row {
    grid-template-columns: 92px 168px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: baseline;
  }

  .page-contact .pc-fields__idx {
    grid-column: 1;
  }

  .page-contact .pc-fields__name {
    grid-column: 2;
  }

  .page-contact .pc-fields__hint {
    grid-column: 3;
  }

  .page-contact .pc-meta-bar__inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 760px) {
  .page-contact .pc-types__item {
    grid-template-columns: 72px 190px minmax(0, 1fr);
    gap: 4px 20px;
    align-items: baseline;
  }

  .page-contact .pc-types__idx {
    grid-column: 1;
  }

  .page-contact .pc-types__name {
    grid-column: 2;
  }

  .page-contact .pc-types__desc {
    grid-column: 3;
  }

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

@media (min-width: 1024px) {
  .page-contact .pc-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-contact .anchor-rail__list {
    grid-template-columns: 1fr;
  }
}