.page-contact {
  --contact-line: rgba(169, 181, 173, .22);
  --contact-border: 2px solid rgba(243, 246, 242, .2);
  --contact-shadow: 10px 10px 0 rgba(24, 224, 122, .13);
  --contact-shadow-hot: 12px 12px 0 rgba(24, 224, 122, .26);
  background: var(--ink);
  color: var(--chalk);
}

.page-contact h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.005em;
  margin: .3em 0 .55em;
  font-size: clamp(1.6rem, 4.6vw, 2.5rem);
}

.page-contact p {
  margin: 0;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 2px solid rgba(24, 224, 122, .45);
}

.page-contact .hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-contact .hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  filter: grayscale(.45) contrast(1.08);
}

.page-contact .hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(24, 224, 122, .2), transparent 62%),
    linear-gradient(180deg, rgba(8, 11, 10, .62) 0%, rgba(8, 11, 10, .9) 58%, var(--ink) 100%);
}

.page-contact .hero-inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 44px);
  padding-block: clamp(18px, 4vw, 30px) clamp(38px, 6vw, 68px);
}

.page-contact .hero-crumbs {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
}

.page-contact .hero-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--silver);
}

.page-contact .hero-crumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: rgba(169, 181, 173, .55);
}

.page-contact .hero-crumbs a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .hero-crumbs a:hover,
.page-contact .hero-crumbs a:focus-visible {
  color: var(--pitch);
  border-bottom-color: var(--pitch);
}

.page-contact .hero-head h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.1rem, 8.2vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -.015em;
  margin: .28em 0 .5em;
}

.page-contact .hero-head h1 span {
  color: var(--pitch);
  display: inline-block;
}

.page-contact .hero-head .lede {
  max-width: 44ch;
  color: var(--chalk);
  opacity: .86;
  font-size: clamp(.95rem, 2.4vw, 1.06rem);
  line-height: 1.72;
}

/* 三块信息卡 */

.page-contact .contact-cards {
  display: grid;
  gap: 14px;
}

.page-contact .info-card {
  background: rgba(27, 42, 34, .88);
  border: var(--contact-border);
  box-shadow: var(--contact-shadow);
  padding: 18px 16px 16px;
  display: grid;
  gap: 8px;
  transition: transform .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-contact .info-card:hover,
.page-contact .info-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(24, 224, 122, .8);
  box-shadow: var(--contact-shadow-hot);
}

.page-contact .info-card__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--pitch);
  text-transform: uppercase;
}

.page-contact .info-card__value {
  font-weight: 600;
  font-size: clamp(.92rem, 3.4vw, 1rem);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.page-contact .info-card__value.mono {
  font-family: var(--font-mono);
  letter-spacing: .01em;
}

.page-contact .info-card__value--tel {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 6.6vw, 2rem);
  color: var(--lime);
  letter-spacing: .02em;
}

.page-contact .info-card__value--addr {
  font-size: .9rem;
  line-height: 1.65;
  color: var(--chalk);
}

.page-contact .info-card__note {
  color: var(--silver);
  font-size: .84rem;
  line-height: 1.6;
}

.page-contact .copy-btn {
  justify-self: start;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  padding: 6px 11px;
  background: transparent;
  color: var(--orange);
  border: 1px solid rgba(255, 107, 44, .55);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .copy-btn:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

/* ---------- 传导线 ---------- */

.page-contact .relay {
  display: flex;
  align-items: center;
  height: 2px;
  margin-block: clamp(26px, 5vw, 44px) 0;
}

.page-contact .relay__node {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--pitch);
  box-shadow: 0 0 0 4px rgba(24, 224, 122, .14);
}

.page-contact .relay__line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, rgba(24, 224, 122, .85), rgba(24, 224, 122, .06));
}

.page-contact .relay__node--end {
  background: transparent;
  border: 2px solid rgba(24, 224, 122, .5);
  box-shadow: none;
}

/* ---------- 反馈前准备 ---------- */

.page-contact .prep__head {
  max-width: 52ch;
}

.page-contact .prep__head p {
  color: var(--silver);
  font-size: .95rem;
  line-height: 1.72;
}

.page-contact .prep-list {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px 24px;
}

.page-contact .prep-item {
  border-left: 2px solid rgba(24, 224, 122, .38);
  padding-left: 16px;
  display: grid;
  gap: 6px;
}

.page-contact .prep-item__num {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--pitch);
}

.page-contact .prep-item h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
  color: var(--chalk);
}

.page-contact .prep-item p {
  color: var(--silver);
  font-size: .88rem;
  line-height: 1.65;
}

.page-contact .prep__hint {
  margin-top: clamp(24px, 4vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--contact-line);
  display: grid;
  gap: 14px;
  align-items: start;
}

.page-contact .prep__hint p {
  color: var(--silver);
  font-size: .9rem;
  line-height: 1.68;
  max-width: 60ch;
}

.page-contact .prep__hint .btn {
  justify-self: start;
}

/* ---------- 渠道 ---------- */

.page-contact .channels__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-contact .channels__intro {
  color: var(--silver);
  font-size: .95rem;
  line-height: 1.72;
  max-width: 54ch;
}

.page-contact .channels__media .figure {
  box-shadow: var(--contact-shadow);
}

.page-contact .channels__media .figure__caption {
  color: var(--silver);
}

.page-contact .channel-list {
  display: grid;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .channel {
  background: rgba(14, 34, 51, .72);
  border: 1px solid var(--contact-line);
  padding: 14px 16px;
  display: grid;
  gap: 5px;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-contact .channel:hover {
  border-color: rgba(24, 224, 122, .6);
  background: rgba(14, 34, 51, .95);
}

.page-contact .channel__name {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--silver);
}

.page-contact .channel__value {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 600;
  color: var(--chalk);
  overflow-wrap: anywhere;
  line-height: 1.45;
}

.page-contact .channel__value--addr {
  font-family: var(--font-sans);
  font-size: .9rem;
  font-weight: 500;
  line-height: 1.6;
}

.page-contact .channel__note {
  color: var(--silver);
  font-size: .84rem;
  line-height: 1.6;
}

/* ---------- 合作 ---------- */

.page-contact .coop__head {
  max-width: 58ch;
}

.page-contact .coop__head p {
  color: var(--silver);
  font-size: .95rem;
  line-height: 1.72;
}

.page-contact .coop-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-contact .coop-card {
  background: var(--deep);
  border: var(--contact-border);
  padding: 20px 18px 22px;
  display: grid;
  gap: 9px;
  align-content: start;
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .coop-card:hover {
  transform: translateY(-3px);
  border-color: rgba(24, 224, 122, .7);
}

.page-contact .coop-card .tag {
  justify-self: start;
}

.page-contact .coop-card h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.42;
  color: var(--chalk);
}

.page-contact .coop-card p {
  color: var(--silver);
  font-size: .88rem;
  line-height: 1.68;
}

/* ---------- 回音 ---------- */

.page-contact .response__panel {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(22px, 4vw, 40px);
  border: var(--contact-border);
}

.page-contact .response__lead p:not(.eyebrow) {
  color: var(--silver);
  font-size: .92rem;
  line-height: 1.72;
  max-width: 40ch;
}

.page-contact .response__rows {
  margin: 0;
  display: grid;
}

.page-contact .response__row {
  border-top: 1px solid var(--contact-line);
  padding-block: 14px;
  display: grid;
  gap: 5px;
}

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

.page-contact .response__row:last-child {
  padding-bottom: 0;
}

.page-contact .response__row dt {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-contact .response__row dd {
  margin: 0;
  color: var(--silver);
  font-size: .88rem;
  line-height: 1.68;
}

/* ---------- 法律入口 ---------- */

.page-contact .legal__inner {
  display: grid;
  gap: 18px;
  border-top: 1px solid var(--contact-line);
  padding-top: clamp(20px, 3vw, 28px);
}

.page-contact .legal__inner h2 {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  margin-top: 0;
}

.page-contact .legal__inner p {
  color: var(--silver);
  font-size: .88rem;
  line-height: 1.7;
  max-width: 56ch;
}

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

.page-contact .legal__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 15px;
  border: 1px solid rgba(169, 181, 173, .35);
  border-radius: var(--radius);
  color: var(--chalk);
  font-size: .88rem;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-contact .legal__link:hover,
.page-contact .legal__link:focus-visible {
  border-color: var(--pitch);
  color: var(--pitch);
  background: rgba(24, 224, 122, .06);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .prep__hint {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-contact .prep__hint .btn {
    justify-self: end;
  }

  .page-contact .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-contact .hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
    column-gap: clamp(32px, 5vw, 68px);
  }

  .page-contact .hero-crumbs {
    grid-column: 1 / -1;
  }

  .page-contact .contact-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-top: 8px;
  }

  .page-contact .info-card:nth-child(1) {
    margin-right: 16%;
  }

  .page-contact .info-card:nth-child(2) {
    margin-left: 10%;
    margin-right: 4%;
  }

  .page-contact .info-card:nth-child(3) {
    margin-left: 4%;
  }

  .page-contact .channels__grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: start;
  }

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

  .page-contact .response__panel {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-contact .legal__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .info-card,
  .page-contact .coop-card,
  .page-contact .copy-btn,
  .page-contact .legal__link,
  .page-contact .channel {
    transition: none;
  }

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