.page-contact {
  --ct-gap: clamp(1.75rem, 4.5vw, 3.25rem);
  --ct-pad: clamp(1.25rem, 4vw, 2.5rem);
  width: 100%;
  max-width: calc(var(--shell) + var(--ct-pad) * 2);
  margin-inline: auto;
  padding: clamp(1.25rem, 3.5vw, 2.25rem) var(--ct-pad) clamp(3rem, 7vw, 5rem);
  color: var(--fog);
}

.page-contact > * + * {
  margin-block-start: var(--ct-gap);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-lead {
  display: grid;
  gap: 0.95rem;
}

.page-contact .contact-intro {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(148deg, rgba(90, 15, 30, 0.66) 0%, rgba(90, 15, 30, 0.1) 48%, rgba(16, 17, 20, 0) 74%),
    var(--ink);
  padding: clamp(2.25rem, 6vw, 4rem) clamp(1.5rem, 5vw, 3.5rem) clamp(2.5rem, 7vw, 4.75rem);
}

.page-contact .contact-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
}

.page-contact .contact-intro::after {
  content: "";
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 0;
  width: min(42%, 320px);
  height: 4px;
  background: linear-gradient(90deg, var(--neon) 0%, rgba(228, 255, 63, 0) 100%);
}

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

.page-contact .contact-intro h1 {
  margin: 0.7rem 0 1rem;
  max-width: 20ch;
  font-size: clamp(1.85rem, 4.6vw, 4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-contact .contact-intro__lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: rgba(242, 243, 245, 0.76);
}

/* ---------- 反馈队列视觉 ---------- */

.page-contact .contact-visual {
  margin-inline: 0;
  margin-block: 0;
}

.page-contact .contact-visual .media {
  border: 1px solid var(--line);
}

/* ---------- 三条路径 ---------- */

.page-contact .section__head {
  max-width: 62rem;
  margin-block-end: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .contact-paths__sub {
  margin: 0.7rem 0 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(242, 243, 245, 0.62);
}

.page-contact .contact-paths__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.85rem, 2.2vw, 1.35rem);
}

.page-contact .contact-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(1.4rem, 2.8vw, 2rem);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 48, 46, 0.26) 0%, rgba(16, 17, 20, 0.92) 78%);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  height: 3px;
  background: var(--blau);
}

.page-contact .contact-card--tel::before {
  background: var(--ziegel);
}

.page-contact .contact-card--addr::before {
  background: var(--neon);
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-contact .contact-card__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--steel);
}

.page-contact .contact-card__title {
  margin: 0.45rem 0 0;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-contact .contact-card__desc {
  margin: 0.55rem 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(242, 243, 245, 0.66);
}

.page-contact .contact-card__value {
  margin: auto 0 0.4rem;
  padding-block-start: 1.1rem;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.45vw, 1.1rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--neon);
  word-break: break-word;
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .contact-card--tel .contact-card__value {
  color: var(--blau);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  letter-spacing: 0.02em;
}

.page-contact .contact-card__value--addr {
  font-size: clamp(0.88rem, 1.3vw, 1rem);
  color: var(--fog);
  letter-spacing: 0.01em;
}

.page-contact .contact-card__meta {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 数据勘误 ---------- */

.page-contact .contact-fix {
  padding-block-start: clamp(1.5rem, 4vw, 2.5rem);
  border-block-start: 1px solid var(--line);
}

.page-contact .contact-fix__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-contact .contact-fix__text {
  margin: 0.95rem 0 0;
  max-width: 46ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(242, 243, 245, 0.74);
}

.page-contact .contact-fix__hint {
  margin: 1.15rem 0 0;
  max-width: 46ch;
  padding: 0.9rem 1.1rem;
  border-inline-start: 2px solid var(--blau);
  background: rgba(74, 155, 255, 0.07);
  font-size: 0.88rem;
  line-height: 1.78;
  color: rgba(242, 243, 245, 0.72);
}

.page-contact .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: ct-step;
  border-block-start: 1px solid var(--line);
}

.page-contact .step-list__item {
  position: relative;
  counter-increment: ct-step;
  padding: clamp(1rem, 2.4vw, 1.35rem) clamp(0.6rem, 2vw, 1rem) clamp(1rem, 2.4vw, 1.35rem) clamp(3rem, 6vw, 4rem);
  border-block-end: 1px solid var(--line);
  transition: background-color 0.3s var(--ease);
}

.page-contact .step-list__item::before {
  content: counter(ct-step, decimal-leading-zero);
  position: absolute;
  inset-inline-start: clamp(0.6rem, 2vw, 1rem);
  inset-block-start: clamp(0.95rem, 2.4vw, 1.3rem);
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--blau);
  transition: color 0.3s var(--ease);
}

.page-contact .step-list__item:hover,
.page-contact .step-list__item:focus-within {
  background: rgba(74, 155, 255, 0.06);
}

.page-contact .step-list__item:hover::before,
.page-contact .step-list__item:focus-within::before {
  color: var(--neon);
}

.page-contact .step-list__title {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--fog);
}

.page-contact .step-list__body {
  margin: 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.82;
  color: rgba(242, 243, 245, 0.68);
}

/* ---------- 合作与选题 ---------- */

.page-contact .contact-collab__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.85rem, 2.2vw, 1.5rem);
}

.page-contact .contact-collab__card {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
}

.page-contact .contact-collab__title {
  margin: 0 0 0.85rem;
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-contact .contact-collab__card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(242, 243, 245, 0.76);
}

.page-contact .contact-collab__list {
  display: grid;
  gap: 0.7rem;
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-collab__list li {
  position: relative;
  padding-inline-start: 1.15rem;
  font-size: 0.89rem;
  line-height: 1.78;
  color: rgba(242, 243, 245, 0.68);
}

.page-contact .contact-collab__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.68em;
  width: 7px;
  height: 2px;
  background: var(--neon);
}

/* ---------- 来信地址 ---------- */

.page-contact .contact-mail__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.85rem, 2.2vw, 1.5rem);
}

.page-contact .contact-mail__card {
  padding: clamp(1.75rem, 4vw, 3rem);
  border: 1px solid var(--line);
}

.page-contact .contact-mail__addr {
  display: block;
  margin: 1rem 0 0;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--fog);
}

.page-contact .contact-mail__text {
  margin: 1.15rem 0 0;
  max-width: 48ch;
  font-size: 0.93rem;
  line-height: 1.85;
  color: rgba(242, 243, 245, 0.7);
}

.page-contact .contact-mail__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(6, 48, 46, 0.5) 0%, rgba(16, 17, 20, 0.2) 100%);
}

.page-contact .contact-mail__visual svg {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
}

/* ---------- 底部通栏与脚注 ---------- */

.page-contact .contact-band {
  margin-inline: 0;
  margin-block: 0;
}

.page-contact .contact-band .media {
  border: 1px solid var(--line);
}

.page-contact .contact-footnote {
  margin: 0;
  padding-block-start: clamp(0.75rem, 2vw, 1.25rem);
  max-width: 74ch;
  font-size: 0.86rem;
  line-height: 1.85;
  color: var(--steel);
}

.page-contact .contact-footnote a {
  color: var(--blau);
  text-decoration: none;
  border-block-end: 1px solid rgba(74, 155, 255, 0.4);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-contact .contact-footnote a:hover,
.page-contact .contact-footnote a:focus-visible {
  color: var(--neon);
  border-block-end-color: var(--neon);
}

/* ---------- 响应式 ---------- */

@media (min-width: 800px) {
  .page-contact .contact-paths__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }
}

@media (min-width: 860px) {
  .page-contact .contact-collab__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .contact-fix__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-mail__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: stretch;
  }
}

@media (max-width: 560px) {
  .page-contact .contact-intro h1 {
    max-width: none;
  }

  .page-contact .contact-card__value {
    word-break: break-all;
  }

  .page-contact .step-list__item {
    padding-inline-start: 2.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .step-list__item,
  .page-contact .step-list__item::before,
  .page-contact .contact-footnote a {
    transition: none;
  }

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