.page-contact {
  background: var(--deep-sea);
  color: var(--pearl);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(22px, 3.4vw, 40px) 0 clamp(56px, 8vw, 104px);
  background:
    radial-gradient(115% 88% at 84% -6%, rgba(13, 46, 40, 0.92) 0%, rgba(6, 26, 40, 0) 64%),
    linear-gradient(180deg, #04121d 0%, var(--deep-sea) 56%, var(--midnight) 100%);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.3;
  filter: saturate(0.68);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 40, 0.55) 0%, rgba(6, 26, 40, 0.88) 52%, var(--midnight) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__eyebrow {
  margin-top: clamp(20px, 3vw, 34px);
  color: var(--dark-gold);
  letter-spacing: 0.22em;
}

.page-contact .contact-hero__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(34px, 6.4vw, 74px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin: 12px 0 0;
  max-width: 16em;
  color: var(--pearl);
}

.page-contact .contact-hero__lede {
  margin: clamp(16px, 2.2vw, 26px) 0 0;
  max-width: 44em;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

/* ============ 三张渠道卡 ============ */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(32px, 4.6vw, 56px);
}

.page-contact .channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: transform 340ms var(--ease), border-color 340ms var(--ease), background-color 340ms var(--ease);
}

.page-contact .channel:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 224, 200, 0.55);
  background: rgba(255, 255, 255, 0.11);
}

.page-contact .channel--phone {
  background: linear-gradient(158deg, #0d2e28 0%, #08211d 100%);
  border-color: rgba(110, 106, 85, 0.4);
}

.page-contact .channel--phone:hover {
  background: linear-gradient(158deg, #10362f 0%, #0a2622 100%);
}

.page-contact .channel--addr {
  background: rgba(13, 46, 40, 0.42);
}

.page-contact .channel__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--dark-gold);
}

.page-contact .channel__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(20px, 2.2vw, 25px);
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--pearl);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(15px, 1.45vw, 18px);
  letter-spacing: 0.02em;
  color: var(--neon-teal);
  overflow-wrap: anywhere;
}

.page-contact .channel__value--addr {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--pearl);
}

.page-contact .channel__desc {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-contact .channel__path {
  display: block;
  width: 100%;
  height: 40px;
  margin-top: 10px;
  color: var(--dark-gold);
  opacity: 0.75;
}

.page-contact .channel__copy {
  align-self: flex-start;
  margin-top: 14px;
}

.page-contact .copy-btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid rgba(53, 224, 200, 0.38);
  background: rgba(53, 224, 200, 0.08);
  color: var(--neon-teal);
  cursor: pointer;
  transition: background-color 300ms var(--ease), border-color 300ms var(--ease), color 300ms var(--ease);
}

.page-contact .copy-btn:hover {
  background: rgba(53, 224, 200, 0.18);
  border-color: var(--neon-teal);
}

.page-contact .copy-btn[data-copied] {
  background: var(--neon-teal);
  border-color: var(--neon-teal);
  color: #04211c;
}

/* ============ 章节通用 ============ */
.page-contact .section {
  position: relative;
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-contact .section--routing {
  background: linear-gradient(180deg, var(--midnight) 0%, var(--deep-sea) 22%, var(--deep-sea) 100%);
}

.page-contact .section--window {
  background: linear-gradient(180deg, var(--deep-sea) 0%, var(--ink-green) 30%, #0a251f 100%);
}

.page-contact .section--mail {
  background: linear-gradient(180deg, #0a251f 0%, var(--deep-sea) 34%, var(--deep-sea) 100%);
}

.page-contact .section--index {
  background: linear-gradient(180deg, var(--deep-sea) 0%, #05161f 100%);
  padding-bottom: clamp(64px, 9vw, 118px);
}

.page-contact .chapter {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 4px 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-contact .chapter__num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(40px, 7vw, 74px);
  line-height: 0.82;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold-grey);
  letter-spacing: 0.02em;
}

.page-contact .chapter__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(22px, 3vw, 36px);
  line-height: 1.28;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--pearl);
}

.page-contact .chapter__label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--dark-gold);
}

/* ============ 01 渠道选择 ============ */
.page-contact .routing-figure {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(13, 46, 40, 0.35);
}

.page-contact .routing-figure .figure__media {
  display: block;
  line-height: 0;
}

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

.page-contact .figure__caption {
  padding: 12px 18px 14px;
  font-size: 13px;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  line-height: 1.7;
}

.page-contact .routing-lead {
  margin: 0 0 clamp(18px, 2.4vw, 30px);
  max-width: 48em;
  color: var(--pearl);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

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

.page-contact .route {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 320ms var(--ease);
}

.page-contact .route:hover {
  background: rgba(53, 224, 200, 0.04);
}

.page-contact .route__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--dark-gold);
}

.page-contact .route__main {
  flex: 1 1 300px;
  min-width: 0;
}

.page-contact .route__title {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(18px, 2vw, 23px);
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  color: var(--pearl);
}

.page-contact .route__desc {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.82;
  max-width: 46em;
}

.page-contact .route__channel {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  border: 1px solid rgba(53, 224, 200, 0.34);
  border-radius: 999px;
  color: var(--neon-teal);
  white-space: nowrap;
}

/* ============ 02 回复时段 ============ */
.page-contact .window {
  display: grid;
  gap: 20px;
  padding: clamp(24px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--dark-gold);
  border-radius: var(--radius);
  background: rgba(3, 12, 21, 0.42);
  margin-bottom: clamp(32px, 4.4vw, 56px);
}

.page-contact .window__clock {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1;
  color: var(--pearl);
  letter-spacing: 0.01em;
}

.page-contact .window__dash {
  flex: 1 1 30px;
  max-width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--dark-gold), var(--neon-teal), var(--warm-orange));
}

.page-contact .window__day {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--neon-teal);
}

.page-contact .window__note {
  margin: 0;
  max-width: 46em;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.82;
}

.page-contact .sub-title {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--dark-gold);
}

.page-contact .checklist-lead {
  margin: 0 0 20px;
  max-width: 46em;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.82;
}

.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .check-item {
  border-bottom: 1px dashed rgba(110, 106, 85, 0.3);
}

.page-contact .check-item__label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 4px;
  cursor: pointer;
  transition: background-color 280ms var(--ease);
}

.page-contact .check-item__label:hover {
  background: rgba(255, 255, 255, 0.03);
}

.page-contact .check-item__input {
  flex: none;
  width: 17px;
  height: 17px;
  margin-top: 3px;
  accent-color: var(--neon-teal);
  cursor: pointer;
}

.page-contact .check-item__text {
  color: var(--pearl);
  font-size: 15.5px;
  line-height: 1.72;
}

.page-contact .check-item__input:checked + .check-item__text {
  color: var(--mist);
}

/* ============ 03 邮寄与到访 ============ */
.page-contact .mailing-block {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 3vw, 34px) 0 0;
}

.page-contact .mailing-block__address {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(21px, 3vw, 34px);
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: var(--pearl);
  padding-left: 20px;
  border-left: 2px solid var(--dark-gold);
}

.page-contact .mailing-block__copy {
  display: grid;
  gap: 14px;
  max-width: 46em;
}

.page-contact .mailing-block__copy p {
  margin: 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.85;
}

/* ============ 04 快速索引 ============ */
.page-contact .index-lead {
  margin: 0 0 22px;
  max-width: 48em;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

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

.page-contact .idx__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.12em;
  color: var(--neon-teal);
  transition: color 280ms var(--ease);
}

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

.page-contact .idx__summary:hover {
  color: var(--warm-orange);
}

.page-contact .idx__mark {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-contact .idx__mark::before,
.page-contact .idx__mark::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 320ms var(--ease), opacity 320ms var(--ease);
}

.page-contact .idx__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1.5px;
}

.page-contact .idx__mark::after {
  top: 0;
  left: 6px;
  width: 1.5px;
  height: 14px;
}

.page-contact .idx[open] .idx__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-contact .idx__list {
  list-style: none;
  margin: 0;
  padding: 0 0 12px;
}

.page-contact .idx__item {
  display: grid;
  gap: 4px;
  padding: 16px 2px;
  border-top: 1px dashed rgba(110, 106, 85, 0.3);
}

.page-contact .idx__link {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(17px, 1.9vw, 21px);
  color: var(--pearl);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 280ms var(--ease);
}

.page-contact .idx__link:hover {
  color: var(--neon-teal);
}

.page-contact .idx__desc {
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-contact .window {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

  .page-contact .window__clock {
    flex-wrap: nowrap;
  }

  .page-contact .mailing-block {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-contact .idx__item {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-contact .channel-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr) minmax(0, 0.84fr);
    align-items: start;
    gap: 22px;
  }

  .page-contact .channel--phone {
    margin-top: 30px;
  }

  .page-contact .channel--addr {
    margin-top: 66px;
  }

  .page-contact .channel--mail {
    padding: 32px 28px 34px;
  }

  .page-contact .chapter {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: end;
    gap: 0 26px;
  }

  .page-contact .chapter__label {
    grid-column: 3;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.3em;
    padding-bottom: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .route,
  .page-contact .copy-btn,
  .page-contact .idx__link,
  .page-contact .idx__summary,
  .page-contact .check-item__label,
  .page-contact .idx__mark::before,
  .page-contact .idx__mark::after {
    transition: none;
  }

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