.page-contact {
  --contact-rail: clamp(96px, 11vw, 152px);
  background: var(--ink);
  color: var(--body-text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(400px, 56vw, 560px);
  border-bottom: 1px solid var(--steel);
  overflow: hidden;
}

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

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.55) contrast(1.15) brightness(.72);
}

.page-contact .contact-hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 224, 224, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 224, 224, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 45%, #000 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 45%, #000 100%);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 86% 26%, rgba(22, 224, 224, .14), transparent 62%),
    linear-gradient(270deg, rgba(6, 9, 12, .96) 0%, rgba(6, 9, 12, .62) 48%, rgba(6, 9, 12, .18) 100%),
    linear-gradient(180deg, rgba(6, 9, 12, .5) 0%, rgba(6, 9, 12, .2) 34%, rgba(6, 9, 12, .9) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: flex-end;
  width: 100%;
  padding-block: clamp(56px, 8vw, 96px) clamp(32px, 4vw, 56px);
}

.page-contact .contact-hero__text {
  width: min(100%, 640px);
}

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

.page-contact .contact-hero h1 {
  margin: 16px 0 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.6vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--white);
}

.page-contact .contact-hero__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--body-text);
}

/* ---------- 章节骨架 ---------- */
.page-contact .contact-section {
  padding-block: clamp(44px, 6vw, 88px);
}

.page-contact .contact-section + .contact-section {
  border-top: 1px solid var(--steel);
}

.page-contact .section-head {
  display: grid;
  gap: 10px;
  margin: 0 0 clamp(24px, 3vw, 38px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--steel);
}

.page-contact .section-head__num {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-contact .section-head__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
  letter-spacing: -.006em;
  color: var(--white);
}

.page-contact .section-head__note {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 名片式联系板 ---------- */
.page-contact .contact-board {
  display: grid;
  gap: 1px;
  background: var(--steel);
  border: 1px solid var(--steel);
}

.page-contact .contact-row {
  --row-accent: var(--cyan);
  display: grid;
  grid-template-columns: 1fr;
  background: var(--ink);
}

.page-contact .contact-row--tel { --row-accent: var(--lime); }
.page-contact .contact-row--addr { --row-accent: var(--paper); }
.page-contact .contact-row--hours { --row-accent: var(--flare); }

.page-contact .contact-row__label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 14px clamp(16px, 2vw, 22px);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--mist);
  background: var(--ink);
  border-bottom: 1px solid var(--steel);
}

.page-contact .contact-row__label .mono {
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .contact-row__body {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px) clamp(18px, 2.6vw, 38px);
  background: var(--panel);
}

.page-contact .contact-row__body::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--row-accent);
}

.page-contact .contact-value {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.02rem, 2.6vw, 1.5rem);
  line-height: 1.4;
  letter-spacing: .01em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .contact-value--mail,
.page-contact .contact-value--tel {
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .contact-value--addr {
  font-size: clamp(.96rem, 1.9vw, 1.12rem);
  color: var(--paper);
}

.page-contact .contact-value--hours {
  color: var(--lime);
}

.page-contact .contact-row__desc {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--mist);
}

/* ---------- 四类问题 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--steel);
  border-top: 2px solid var(--cyan);
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: var(--steel);
}

.page-contact .channel-card__num {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-contact .channel-card__title {
  margin: 0;
  font-family: var(--display);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-contact .channel-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .channel-card__foot {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--steel);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--lime);
}

/* ---------- 提问准备清单 ---------- */
.page-contact .prep-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--steel);
  border: 1px solid var(--steel);
}

.page-contact .prep-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 18px;
  background: var(--ink);
}

.page-contact .prep-item__num {
  flex: 0 0 auto;
  font-size: 22px;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-contact .prep-item__body {
  display: grid;
  gap: 6px;
}

.page-contact .prep-item__title {
  margin: 0;
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-contact .prep-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .prep-figure {
  margin: var(--gap) 0 0;
  max-width: 820px;
  border: 1px solid var(--steel);
  background: var(--panel);
  overflow: hidden;
}

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

.page-contact .prep-figure__cap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  padding: 14px 18px;
  border-top: 1px solid var(--steel);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 合作三条线 ---------- */
.page-contact .coop-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--steel);
}

.page-contact .coop-row {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--steel);
}

.page-contact .coop-row__key {
  margin: 0;
  font-family: var(--display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cyan);
}

.page-contact .coop-row__body {
  display: grid;
  gap: 10px;
}

.page-contact .coop-row__text {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--body-text);
}

.page-contact .coop-row__hint {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--lime);
}

/* ---------- 站点信息 ---------- */
.page-contact .site-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--steel);
  border: 1px solid var(--steel);
}

.page-contact .site-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 16px 18px;
  background: var(--ink);
}

.page-contact .site-facts__row dt {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-contact .site-facts__row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .site-info__note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .site-info__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收束色带 ---------- */
.page-contact .contact-outro {
  position: relative;
  background: linear-gradient(100deg, var(--deep) 0%, var(--panel) 58%, var(--ink) 100%);
  border-top: 1px solid var(--steel);
}

.page-contact .contact-outro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(240px, 34%);
  height: 2px;
  background: var(--cyan);
}

.page-contact .contact-outro__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
  padding-block: clamp(28px, 4vw, 48px);
}

.page-contact .contact-outro__lead {
  margin: 0;
  max-width: 44ch;
  font-family: var(--display);
  font-size: clamp(1.02rem, 2.2vw, 1.32rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
}

.page-contact .contact-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-contact .contact-outro__links .btn {
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 700px) {
  .page-contact .site-facts {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 780px) {
  .page-contact .contact-row {
    grid-template-columns: var(--contact-rail) 1fr;
  }

  .page-contact .contact-row__label {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 12px;
    padding-top: 26px;
    border-bottom: 0;
    border-right: 1px solid var(--steel);
  }
}

@media (min-width: 820px) {
  .page-contact .prep-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .coop-row {
    grid-template-columns: minmax(150px, 200px) 1fr;
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 639px) {
  .page-contact .contact-hero {
    min-height: clamp(380px, 92vw, 520px);
  }

  .page-contact .contact-hero__media::after {
    background:
      radial-gradient(140% 70% at 80% 12%, rgba(22, 224, 224, .12), transparent 66%),
      linear-gradient(180deg, rgba(6, 9, 12, .72) 0%, rgba(6, 9, 12, .45) 30%, rgba(6, 9, 12, .95) 100%);
  }

  .page-contact .contact-outro__inner {
    align-items: flex-start;
  }

  .page-contact .contact-outro__links {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}