.page-contact {
  --c-coord-w: 340px;
  --c-note-gap: 40px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background-color: var(--ink);
}

.page-contact .contact-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .contact-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
  filter: saturate(0.7) contrast(1.15) brightness(0.8);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 47, 0.6) 0%, rgba(10, 26, 47, 0.92) 62%, var(--ink) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 48px;
  padding-bottom: 52px;
}

.page-contact .contact-hero .breadcrumb {
  margin-bottom: 28px;
}

.page-contact .contact-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 6.2vw, 58px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--bone);
  margin: 18px 0 20px;
  max-width: 20em;
}

.page-contact .contact-hero .lede {
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
  max-width: 40em;
  margin: 0;
}

/* ---------- 横向概况带 ---------- */
.page-contact .contact-strip {
  background-color: var(--wine);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-strip__inner {
  display: grid;
  gap: 18px;
  padding-top: 26px;
  padding-bottom: 26px;
}

.page-contact .contact-strip__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
}

.page-contact .contact-strip__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  flex: none;
  letter-spacing: 0.02em;
}

.page-contact .contact-strip__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--bone);
}

@media (min-width: 760px) {
  .page-contact .contact-strip__inner {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
    align-items: start;
  }
}

/* ---------- 信息板 ---------- */
.page-contact .contact-board {
  padding: 48px 0 72px;
  background-color: var(--ink);
}

.page-contact .contact-board__grid {
  display: grid;
  gap: 36px;
}

/* ---------- 联系坐标 ---------- */
.page-contact .contact-coords {
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: linear-gradient(180deg, rgba(6, 48, 43, 0.6) 0%, rgba(10, 26, 47, 0.95) 100%);
  padding: 26px 22px 22px;
}

.page-contact .contact-coords__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 20px;
}

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

.page-contact .coord {
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-contact .coord__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
  margin-bottom: 7px;
}

.page-contact .coord__v {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .coord--mail .coord__v {
  color: var(--cyan);
  font-size: 14px;
}

.page-contact .coord--phone .coord__v {
  color: var(--orange);
  font-size: 27px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-contact .coord--icp .coord__v {
  color: var(--slate);
  font-size: 13px;
}

.page-contact .coord__copy {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-contact .coord__copy:hover {
  color: var(--ink);
  background-color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .coord__copy:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .contact-coords__note {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 说明段落 ---------- */
.page-contact .contact-board__main {
  display: block;
}

.page-contact .contact-note {
  border-top: 1px solid var(--line);
  padding: 30px 0 38px;
}

.page-contact .contact-note:first-child {
  border-top: 2px solid var(--line-light);
  padding-top: 34px;
}

.page-contact .contact-note__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-contact .contact-note__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  flex: none;
}

.page-contact .contact-note__title {
  font-family: var(--font-head);
  font-size: clamp(21px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--bone);
  margin: 0;
}

.page-contact .contact-note__body > p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
  max-width: 38em;
}

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

.page-contact .contact-note__tail {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
  max-width: 40em;
}

.page-contact .hl {
  color: var(--bone);
  font-weight: 600;
}

.page-contact .hl--cyan {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 0.94em;
  word-break: break-all;
}

.page-contact .hl--orange {
  font-family: var(--font-mono);
  color: var(--orange);
  letter-spacing: 0.03em;
}

.page-contact .contact-note__body .link-underline {
  color: var(--cyan);
}

/* ---------- 合作与纠错项目卡 ---------- */
.page-contact .project-grid {
  display: grid;
  gap: 18px;
  margin: 22px 0 18px;
}

@media (min-width: 740px) {
  .page-contact .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-contact .project {
  border: 1px solid var(--line);
  border-left: 2px solid var(--wine);
  background-color: rgba(10, 26, 47, 0.6);
  padding: 20px 20px 18px;
  transition: transform 0.22s ease, border-color 0.22s ease, background-color 0.22s ease;
}

.page-contact .project:hover,
.page-contact .project:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  background-color: rgba(6, 48, 43, 0.65);
}

.page-contact .project:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-contact .project__title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--bone);
  margin: 0 0 10px;
}

.page-contact .project__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .project__hint {
  display: none;
}

@media (hover: hover) {
  .page-contact .project__hint {
    display: block;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--cyan);
  }
}

.page-contact .project-more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.24s ease, margin-top 0.24s ease;
}

.page-contact .project:hover .project-more,
.page-contact .project:focus-within .project-more {
  max-height: 420px;
  opacity: 1;
  margin-top: 14px;
}

@media (hover: none) {
  .page-contact .project-more {
    max-height: 480px;
    opacity: 1;
    margin-top: 14px;
  }
}

.page-contact .project-more__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .project-more__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .project-more__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background-color: var(--cyan);
}

/* ---------- 办公地点 ---------- */
.page-contact .office-grid {
  display: grid;
  gap: 28px;
  margin-top: 20px;
}

.page-contact .office-grid__text > p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--mist);
  max-width: 36em;
}

.page-contact .address-lines {
  list-style: none;
  margin: 0 0 22px;
  padding: 4px 0 4px 20px;
  border-left: 1px solid var(--cyan);
}

.page-contact .address-lines li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 7px 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--bone);
}

.page-contact .address-lines__k {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.page-contact .office-map {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  margin-top: 6px;
  border: 1px solid var(--line-soft);
  background-color: rgba(6, 48, 43, 0.35);
}

.page-contact .office-figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .office-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.12) brightness(0.86);
}

.page-contact .office-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 47, 0.1) 0%, rgba(10, 26, 47, 0.72) 100%);
  pointer-events: none;
}

@media (min-width: 880px) {
  .page-contact .office-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
    gap: 46px;
    align-items: start;
  }
}

/* ---------- 准备清单 ---------- */
.page-contact .prep-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background-color: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 620px) {
  .page-contact .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .prep-list li {
  background-color: var(--ink);
  padding: 18px 20px;
  transition: background-color 0.2s ease;
}

.page-contact .prep-list li:hover {
  background-color: rgba(6, 48, 43, 0.6);
}

.page-contact .prep-list__k {
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .prep-list__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 桌面端轨道布局 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-hero__inner {
    padding-top: 72px;
    padding-bottom: 76px;
  }

  .page-contact .contact-board {
    padding: 64px 0 96px;
  }

  .page-contact .contact-board__grid {
    grid-template-columns: minmax(0, 1fr) var(--c-coord-w);
    gap: 64px;
    align-items: start;
  }

  .page-contact .contact-coords {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 110px;
  }

  .page-contact .contact-board__main {
    grid-column: 1;
    grid-row: 1;
  }

  .page-contact .contact-note {
    padding-bottom: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coord__copy,
  .page-contact .project,
  .page-contact .project-more,
  .page-contact .prep-list li {
    transition: none;
  }

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