.page-contact {
  --pc-line: 1px solid var(--ink-500);
  --pc-hair: 1px solid rgba(159, 178, 196, 0.22);
  background: var(--ink-900);
  color: var(--white-soft);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-contact .wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  box-sizing: border-box;
}

.page-contact a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 214, 0.42);
  transition: color 140ms ease, border-color 140ms ease;
}

.page-contact a:hover {
  color: var(--amber-400);
  border-bottom-color: var(--amber-400);
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--amber-400);
  outline-offset: 3px;
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  padding-top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-300);
}

.page-contact .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-contact .crumbs li + li::before {
  content: "/";
  color: var(--ink-500);
}

.page-contact .crumbs a {
  border-bottom: none;
  color: var(--slate-300);
}

.page-contact .crumbs a:hover {
  color: var(--cyan-400);
}

.page-contact .crumbs [aria-current="page"] {
  color: var(--amber-400);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: 34px 0 60px;
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: 34px;
}

.page-contact .eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-contact h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white-soft);
  overflow-wrap: break-word;
}

.page-contact .lede {
  max-width: 54ch;
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-contact .quickline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-contact .quickline .chip {
  padding: 6px 12px;
  border: var(--pc-line);
  background: var(--ink-700);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate-300);
}

.page-contact .hero-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-300);
}

.page-contact .media-figure {
  margin: 0;
}

.page-contact .media-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--pc-line);
  filter: saturate(0.55) contrast(1.05) brightness(0.9);
}

.page-contact .media-caption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan-700);
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-300);
}

/* ---------- 主体左右分置 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: 52px;
  padding: 56px 0 64px;
  border-top: var(--pc-line);
  border-bottom: var(--pc-line);
}

.page-contact .section-title {
  margin: 0 0 26px;
  padding-bottom: 12px;
  border-bottom: var(--pc-line);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.01em;
  color: var(--white-soft);
}

/* 通道卡片 */
.page-contact .channel-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-card {
  position: relative;
  padding: 24px 22px 20px 25px;
  background: var(--ink-700);
  border: var(--pc-line);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: -1px;
  width: 3px;
  background: var(--cyan-400);
  transition: background-color 160ms ease;
}

.page-contact .channel-card:hover {
  border-color: var(--cyan-700);
  background: var(--ink-500);
}

.page-contact .channel-card:hover::before {
  background: var(--amber-400);
}

.page-contact .channel-card__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}

.page-contact .channel-card__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--amber-400);
}

.page-contact .channel-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--white-soft);
}

.page-contact .channel-card__value {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-left: 2px solid var(--cyan-700);
  background: rgba(53, 208, 214, 0.07);
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  word-break: break-all;
  user-select: all;
}

.page-contact .channel-card__desc {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-contact .channel-card__meta {
  margin: 0;
  padding-top: 12px;
  border-top: var(--pc-hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--slate-300);
}

/* 准备清单 */
.page-contact .prep {
  margin-bottom: 52px;
}

.page-contact .checklist {
  display: grid;
  gap: 0;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-contact .checklist > li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: var(--pc-hair);
}

.page-contact .checklist > li:first-child {
  padding-top: 4px;
}

.page-contact .checklist__box {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--cyan-700);
  background: var(--ink-700);
}

.page-contact .checklist__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--amber-400);
  border-bottom: 2px solid var(--amber-400);
  transform: rotate(40deg);
}

.page-contact .checklist__label {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white-soft);
}

.page-contact .checklist__hint {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-contact .prep__figure {
  margin-bottom: 24px;
}

.page-contact .prep__more {
  border: var(--pc-line);
  background: var(--ink-700);
}

.page-contact .prep__more summary {
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--cyan-400);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .prep__more summary::before {
  content: "＋";
  display: inline-block;
  width: 18px;
  color: var(--amber-400);
  font-family: var(--font-mono);
}

.page-contact .prep__more[open] summary::before {
  content: "－";
}

.page-contact .prep__more-body {
  padding: 0 16px 16px 34px;
  border-top: var(--pc-hair);
}

.page-contact .prep__more-body p {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* 回复节奏 */
.page-contact .flow__lead {
  margin: 0 0 26px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-300);
}

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

.page-contact .flow__item {
  position: relative;
  margin-left: 21px;
  padding: 0 0 26px 24px;
  border-left: 1px solid var(--ink-500);
  transition: background-color 160ms ease;
}

.page-contact .flow__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .flow__item:hover,
.page-contact .flow__item:focus-within {
  background: rgba(18, 112, 122, 0.14);
}

.page-contact .flow__step {
  position: absolute;
  left: -21px;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 22px;
  box-sizing: border-box;
  background: var(--ink-900);
  border: 1px solid var(--ink-500);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--amber-400);
}

.page-contact .flow__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--white-soft);
}

.page-contact .flow__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 合作 ---------- */
.page-contact .partner {
  padding: 56px 0;
  background: linear-gradient(180deg, var(--ink-700) 0%, var(--ink-900) 100%);
  border-bottom: var(--pc-line);
}

.page-contact .partner__inner {
  display: grid;
  gap: 34px;
}

.page-contact .partner h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white-soft);
}

.page-contact .partner__text p {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate-300);
}

.page-contact .partner__text p:last-child {
  margin-bottom: 0;
}

.page-contact .partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair);
}

.page-contact .partner__list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: var(--pc-hair);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--white-soft);
}

.page-contact .partner__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber-400);
}

/* ---------- 站点身份横带 ---------- */
.page-contact .ident {
  padding: 52px 0 68px;
}

.page-contact .ident__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.page-contact .ident__band {
  display: grid;
  gap: 1px;
  background: var(--ink-500);
  border: var(--pc-line);
}

.page-contact .ident__cell {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: var(--ink-700);
}

.page-contact .ident__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-300);
}

.page-contact .ident__val {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--amber-400);
  word-break: break-all;
}

.page-contact .ident__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate-300);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: 44px 0 68px;
  }

  .page-contact .contact-body {
    padding: 68px 0 76px;
  }

  .page-contact .partner {
    padding: 68px 0;
  }

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

  .page-contact .checklist > li {
    padding: 18px 0;
  }
}

@media (min-width: 940px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: end;
  }

  .page-contact .contact-body {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 60px;
  }

  .page-contact .partner__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .flow__item,
  .page-contact a {
    transition: none;
  }
}
</style>