.page-contact {
  --ct-cut: 22px;
  background-color: var(--bt-paper);
  background-image: radial-gradient(rgba(11, 31, 51, .04) 1px, transparent 1px);
  background-size: 3px 3px;
  color: var(--bt-black);
  font-family: var(--bt-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-contact .ct-crumbs {
  padding-top: 26px;
}

.page-contact .ct-crumbs .bt-crumbs__item a {
  color: var(--bt-mist);
  text-decoration: none;
}

.page-contact .ct-crumbs .bt-crumbs__item a:hover,
.page-contact .ct-crumbs .bt-crumbs__item a:focus-visible {
  color: var(--bt-gold-deep);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  padding-block: 26px 58px;
}

.page-contact .ct-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

.page-contact .ct-eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px 6px 12px;
  background: var(--bt-gold-soft);
  color: var(--bt-gold-deep);
  font-family: var(--bt-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}

.page-contact .ct-hero__title {
  margin: 0 0 18px;
  max-width: 14ch;
  font-family: var(--bt-serif);
  font-weight: 700;
  font-size: clamp(2rem, 7.4vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--bt-ink);
}

.page-contact .ct-hero__text {
  margin: 0;
  max-width: 54ch;
  color: #232E3A;
}

.page-contact .ct-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .ct-quick__item {
  padding: 13px 16px;
  background: #FFFFFF;
  border: 1px solid var(--bt-silver);
  border-left: 3px solid var(--bt-gold);
}

.page-contact .ct-quick__key {
  display: block;
  font-family: var(--bt-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--bt-mist);
}

.page-contact .ct-quick__val {
  display: block;
  font-family: var(--bt-mono);
  font-size: clamp(.9rem, 3.4vw, 1.05rem);
  color: var(--bt-ink);
  word-break: break-word;
}

.page-contact .ct-hero__figure {
  margin: 0;
}

.page-contact .ct-hero__figure .bt-figure__frame {
  aspect-ratio: 14 / 9;
  background-color: var(--bt-ink);
  background-image: repeating-linear-gradient(135deg, rgba(225, 199, 163, .18) 0 1px, transparent 1px 14px);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
  overflow: hidden;
}

.page-contact .ct-hero__figure .bt-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .ct-hero__figure .bt-figure__caption {
  margin-top: 12px;
  font-family: var(--bt-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--bt-mist);
}

/* ---------- 通用章节 ---------- */
.page-contact .ct-section {
  padding-block: 54px;
}

.page-contact .ct-section__head {
  max-width: 66ch;
  margin-bottom: 34px;
}

.page-contact .ct-section__index {
  display: block;
  margin-bottom: 12px;
  font-family: var(--bt-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--bt-gold-deep);
}

.page-contact .ct-section__title {
  margin: 0 0 14px;
  font-family: var(--bt-serif);
  font-weight: 700;
  font-size: clamp(1.55rem, 5vw, 2.4rem);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--bt-ink);
}

.page-contact .ct-section__lead {
  margin: 0;
  max-width: 62ch;
  color: #232E3A;
}

/* ---------- 渠道卡 ---------- */
.page-contact .ct-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .ct-channel {
  --acc: var(--bt-mist);
  position: relative;
  padding: 26px 22px 24px;
  background: #FFFFFF;
  border-top: 4px solid var(--acc);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ct-cut)), calc(100% - var(--ct-cut)) 100%, 0 100%);
  transition: background-color var(--bt-dur) var(--bt-ease), transform var(--bt-dur) var(--bt-ease);
}

.page-contact .ct-channel--a { --acc: var(--bt-mist); }
.page-contact .ct-channel--b { --acc: var(--bt-gold); }
.page-contact .ct-channel--c { --acc: var(--bt-night); }

.page-contact .ct-channel:hover {
  background: #FFFDF6;
  transform: translateY(-3px);
}

.page-contact .ct-channel__num {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--bt-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--acc);
}

.page-contact .ct-channel__title {
  margin: 0 0 12px;
  font-family: var(--bt-serif);
  font-size: 1.22rem;
  line-height: 1.35;
  color: var(--bt-ink);
}

.page-contact .ct-channel__text {
  margin: 0 0 16px;
  font-size: .95rem;
  color: #2A3542;
}

.page-contact .ct-channel__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  border-top: 1px dashed var(--bt-silver);
  padding-top: 14px;
}

.page-contact .ct-channel__list li {
  position: relative;
  padding-left: 18px;
  font-size: .875rem;
  line-height: 1.65;
  color: #34404D;
}

.page-contact .ct-channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 2px;
  background: var(--acc);
}

.page-contact .ct-channel__foot {
  margin: 16px 0 0;
  font-family: var(--bt-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--bt-mist);
  word-break: break-word;
}

/* ---------- 版本核验 ---------- */
.page-contact .ct-verify {
  background-color: var(--bt-mist-soft);
  background-image: repeating-linear-gradient(135deg, rgba(11, 31, 51, .045) 0 1px, transparent 1px 13px);
  border-block: 1px solid var(--bt-silver);
}

.page-contact .ct-verify__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-contact .ct-steps {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: ct-step;
  display: grid;
  gap: 18px;
}

.page-contact .ct-steps li {
  position: relative;
  padding-left: 50px;
  counter-increment: ct-step;
  color: #232E3A;
}

.page-contact .ct-steps li::before {
  content: counter(ct-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 34px;
  height: 24px;
  display: grid;
  place-items: center;
  background: #FFFFFF;
  border: 1px solid var(--bt-gold);
  font-family: var(--bt-mono);
  font-size: 12px;
  color: var(--bt-gold-deep);
}

.page-contact .ct-steps strong {
  color: var(--bt-ink);
}

.page-contact .ct-verify__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-contact .ct-tpl {
  background: #FFFFFF;
  border: 1px solid var(--bt-silver);
  border-top: 3px solid var(--bt-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-contact .ct-tpl summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 17px 20px;
  font-family: var(--bt-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--bt-ink);
}

.page-contact .ct-tpl summary::-webkit-details-marker { display: none; }

.page-contact .ct-tpl summary::after {
  content: "+";
  font-size: 17px;
  line-height: 1;
  color: var(--bt-gold);
}

.page-contact .ct-tpl[open] summary::after {
  content: "–";
}

.page-contact .ct-tpl summary:focus-visible {
  outline: 2px solid var(--bt-gold);
  outline-offset: -2px;
}

.page-contact .ct-tpl__body {
  padding: 4px 20px 22px;
  border-top: 1px dashed var(--bt-silver);
}

.page-contact .ct-tpl__line {
  margin: 12px 0 0;
  font-family: var(--bt-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: #2A3542;
  word-break: break-word;
}

.page-contact .ct-verify__aside .bt-note {
  margin-top: 20px;
}

/* ---------- 合作 ---------- */
.page-contact .ct-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

.page-contact .ct-coop__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-contact .ct-coop__list li {
  padding-left: 20px;
  border-left: 2px solid var(--bt-mist);
  color: #232E3A;
}

.page-contact .ct-coop__list strong {
  color: var(--bt-ink);
}

.page-contact .ct-coop__note {
  margin: 22px 0 24px;
  padding: 16px 18px;
  background: var(--bt-gold-soft);
  font-size: .92rem;
  color: #3A2A16;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-contact .ct-coop__figure {
  margin: 0;
}

.page-contact .ct-coop__figure .bt-figure__frame {
  aspect-ratio: 10 / 7;
  background-color: var(--bt-ink);
  background-image: repeating-linear-gradient(135deg, rgba(111, 143, 138, .22) 0 1px, transparent 1px 14px);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
  overflow: hidden;
}

.page-contact .ct-coop__figure .bt-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .ct-coop__figure .bt-figure__caption {
  margin-top: 12px;
  font-family: var(--bt-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--bt-mist);
}

/* ---------- 服务时间 ---------- */
.page-contact .ct-hours {
  background: var(--bt-night);
  color: var(--bt-paper);
  padding-block: 50px;
  position: relative;
  overflow: hidden;
}

.page-contact .ct-hours::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bt-gold) 0%, var(--bt-gold) 22%, transparent 22%);
}

.page-contact .ct-hours__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-contact .ct-hours__clock {
  margin: 0;
  font-family: var(--bt-mono);
  font-size: clamp(1.5rem, 8vw, 3rem);
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--bt-gold-soft);
}

.page-contact .ct-hours__title {
  margin: 0 0 12px;
  font-family: var(--bt-serif);
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  color: #FFFFFF;
}

.page-contact .ct-hours__text p {
  margin: 0 0 12px;
  max-width: 58ch;
  color: rgba(245, 242, 234, .86);
  font-size: .95rem;
}

.page-contact .ct-hours__text p:last-child {
  margin-bottom: 0;
}

/* ---------- 地址与备案 ---------- */
.page-contact .ct-office__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

.page-contact .ct-address {
  margin: 0 0 18px;
  padding-left: 18px;
  border-left: 3px solid var(--bt-gold);
  font-family: var(--bt-serif);
  font-style: normal;
  font-size: clamp(1.05rem, 3.6vw, 1.4rem);
  line-height: 1.6;
  color: var(--bt-ink);
}

.page-contact .ct-office__text {
  margin: 0;
  max-width: 58ch;
  color: #232E3A;
}

.page-contact .ct-meta {
  margin: 0;
  padding: 18px 0 0;
  border-top: 2px solid var(--bt-ink);
  display: grid;
  gap: 0;
}

.page-contact .ct-meta__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 18px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--bt-silver);
}

.page-contact .ct-meta__key {
  margin: 0;
  font-family: var(--bt-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--bt-mist);
}

.page-contact .ct-meta__val {
  margin: 0;
  font-family: var(--bt-mono);
  font-size: .875rem;
  color: var(--bt-ink);
  text-align: right;
  word-break: break-word;
}

.page-contact .ct-office__hint {
  margin: 18px 0 0;
  font-size: .875rem;
  color: #3C4653;
}

.page-contact .ct-office__hint a {
  color: var(--bt-gold-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--bt-gold);
}

.page-contact .ct-office__hint a:hover,
.page-contact .ct-office__hint a:focus-visible {
  background: var(--bt-gold-soft);
}

/* ---------- 焦点可见性 ---------- */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--bt-gold);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-contact .ct-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-hours__grid {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact .ct-hero {
    padding-block: 34px 76px;
  }

  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 52px;
  }

  .page-contact .ct-section {
    padding-block: 82px;
  }

  .page-contact .ct-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .ct-verify__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
    gap: 52px;
    align-items: start;
  }

  .page-contact .ct-coop__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 52px;
  }

  .page-contact .ct-office__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 56px;
  }

  .page-contact .ct-meta__row {
    padding: 13px 0;
  }
}

@media (min-width: 1180px) {
  .page-contact .ct-hero__title {
    font-size: 4rem;
  }
}