/* ===== 联系我们 · 页面专属样式（作用域：.page-contact） ===== */

.page-contact {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: clamp(28px, 5vw, 58px) 0 clamp(36px, 6vw, 76px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: min(620px, 84%);
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.75;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0) 86%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0) 86%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-contact .contact-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(52px, 13vw, 152px);
  line-height: 0.9;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--white);
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.85;
  color: var(--rule);
}

.page-contact .contact-hero__facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-hero__facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  white-space: nowrap;
}

.page-contact .contact-hero__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.3vw, 15px);
  color: var(--cyan);
  text-align: right;
}

.page-contact .contact-hero__figure {
  position: relative;
  z-index: 1;
  margin: clamp(30px, 5vw, 58px) 0 0;
}

/* ---------- 通用章节 ---------- */

.page-contact .section {
  padding: clamp(46px, 7vw, 92px) 0;
}

.page-contact .section--alt {
  background: var(--bg-2);
}

.page-contact .section-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-contact .section-head__index {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .section-head__title {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-contact .section-head__note {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 渠道 ---------- */

.page-contact .filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(24px, 3vw, 36px);
}

.page-contact .filter__btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 9px 16px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 0;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

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

.page-contact .filter__btn[aria-pressed="true"],
.page-contact .filter__btn.is-active {
  color: var(--ink-on-cyan);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .filter__count {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-left: 4px;
}

.page-contact .contact-channels__body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-contact .contact-channels__list {
  display: grid;
  border-top: 1px solid var(--line);
}

.page-contact .chan {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .chan__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.7vw, 34px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-contact .chan--address .chan__value {
  font-size: clamp(16px, 1.9vw, 22px);
  line-height: 1.5;
}

.page-contact .chan__desc {
  margin: 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rule);
}

.page-contact .chan__meta {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-contact .chan__meta::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 9px;
  background: var(--orange);
  vertical-align: middle;
}

.page-contact .contact-channels__figure {
  margin: 0;
}

/* ---------- 合作 ---------- */

.page-contact .contact-coop__list {
  display: grid;
}

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

.page-contact .coop:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-contact .coop__sum {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  color: var(--ink);
  transition: color 0.18s ease;
}

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

.page-contact .coop__sum:hover {
  color: var(--cyan);
}

.page-contact .coop__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  color: var(--cyan);
}

.page-contact .coop[open] .coop__sum::after {
  content: "–";
}

.page-contact .coop__no {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .coop__body {
  padding: 0 0 clamp(20px, 3vw, 32px);
  max-width: 66ch;
}

.page-contact .coop__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rule);
}

.page-contact .coop__req {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .coop__req li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .coop__req li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .contact-coop__more {
  margin: clamp(26px, 4vw, 40px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-coop__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
  transition: border-color 0.18s ease;
}

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

/* ---------- 纠错 ---------- */

.page-contact .contact-fix__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .contact-fix__steps > li {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--bg);
}

.page-contact .contact-fix__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .contact-fix__steps h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .contact-fix__steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--rule);
}

.page-contact .contact-fix__foot {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.page-contact .contact-fix__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

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

/* ---------- 到访与回复窗口 ---------- */

.page-contact .contact-visit__grid {
  display: grid;
  gap: clamp(30px, 4vw, 56px);
}

.page-contact .contact-visit__address {
  margin: 20px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.8vw, 20px);
  line-height: 1.7;
  color: var(--ink);
}

.page-contact .contact-visit__note {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--rule);
}

.page-contact .contact-window {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-window > div {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-window dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .contact-window dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--rule);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-contact .contact-fix__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.55fr);
    align-items: end;
  }

  .page-contact .contact-channels__body {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-contact .contact-channels__figure {
    position: sticky;
    top: calc(var(--hdr-h) + 28px);
  }

  .page-contact .contact-visit__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }

  .page-contact .contact-visit__aside {
    padding-left: clamp(24px, 3vw, 40px);
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-fix__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .filter__btn,
  .page-contact .coop__sum,
  .page-contact .contact-coop__more a {
    transition: none;
  }
}