.page-contact {
  --ct-pad: clamp(20px, 4vw, 40px);
  --ct-gap: clamp(20px, 3vw, 36px);
  background: var(--ink-0);
  color: var(--fog);
  overflow-x: hidden;
}

.page-contact .section {
  padding-top: clamp(48px, 7vw, 104px);
}

.page-contact .section__head {
  max-width: 38em;
}

.page-contact .eyebrow {
  color: var(--moss);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: linear-gradient(112deg, #06180f 0%, var(--ink-0) 46%, #04120c 100%);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(18px, 3vw, 32px) clamp(32px, 5vw, 64px);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 5%, var(--lime) 55%, transparent 95%);
  opacity: .6;
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 74% 50%;
  opacity: .4;
  -webkit-mask-image: linear-gradient(90deg, transparent 4%, rgba(0, 0, 0, .55) 46%, #000 96%);
  mask-image: linear-gradient(90deg, transparent 4%, rgba(0, 0, 0, .55) 46%, #000 96%);
}

.page-contact .contact-hero__inner {
  position: relative;
}

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-contact .contact-hero .eyebrow {
  color: var(--lime);
  letter-spacing: .3em;
  font-size: 11px;
}

.page-contact .contact-hero .display {
  margin: 12px 0 0;
  max-width: 14em;
}

.page-contact .contact-hero .lede {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 32em;
  color: var(--fog);
}

.page-contact .contact-lines {
  margin-top: clamp(28px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-contact .contact-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "label btn"
    "value btn";
  align-items: center;
  gap: 6px 14px;
  padding-block: clamp(14px, 2.4vw, 22px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-line__label {
  grid-area: label;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--moss);
}

.page-contact .contact-line__value {
  grid-area: value;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(19px, 4.4vw, 36px);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.page-contact .contact-line__btn {
  grid-area: btn;
  align-self: end;
  white-space: nowrap;
}

/* ---------- 渠道 ---------- */

.page-contact .channels {
  display: grid;
  gap: var(--ct-gap);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-contact .channels__tabs {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.page-contact .channel-tab {
  position: relative;
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 15px 16px 15px 22px;
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--moss);
  cursor: pointer;
  transition: color .18s var(--ease), background .18s var(--ease);
}

.page-contact .channel-tab::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background .18s var(--ease);
}

.page-contact .channel-tab:hover {
  color: var(--lime-mist);
}

.page-contact .channel-tab[aria-selected="true"] {
  color: var(--fog);
  background: linear-gradient(90deg, rgba(217, 255, 60, .1), transparent 72%);
}

.page-contact .channel-tab[aria-selected="true"]::before {
  background: var(--lime);
}

.page-contact .channel-tab:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-contact .channel-tab__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--ink-3);
}

.page-contact .channel-tab[aria-selected="true"] .channel-tab__no {
  color: var(--lime);
}

.page-contact .channel-tab__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-contact .channel-tab__meta {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--moss);
}

.page-contact .channels__panels {
  position: relative;
  padding: var(--ct-pad);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, var(--ink-2) 0%, #092a20 42%, var(--ink-1) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-contact .channel-panel__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--lime);
}

.page-contact .channel-panel__title {
  margin: 10px 0 14px;
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.015em;
  color: var(--fog);
}

.page-contact .channel-panel .body-text {
  color: var(--fog);
}

.page-contact .channel-panel__list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-panel__list li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--moss);
}

.page-contact .channel-panel__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: .68em;
  background: var(--lime);
  transform: rotate(45deg);
}

.page-contact .channel-panel__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-contact .channel-panel__addr {
  flex: 1 1 12em;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2vw, 18px);
  letter-spacing: -.01em;
  color: var(--lime-mist);
  overflow-wrap: anywhere;
}

/* ---------- 邮件要点 ---------- */

.page-contact .mail-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-contact .mail-grid__media {
  margin: 0;
}

.page-contact .maillist {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .maillist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 24px);
  padding-block: clamp(14px, 2.2vw, 20px);
  border-bottom: 1px solid var(--line);
}

.page-contact .maillist__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--lime);
  padding-top: 3px;
}

.page-contact .maillist__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--fog);
}

.page-contact .maillist__text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--moss);
}

.page-contact .mail-acc {
  margin-top: clamp(24px, 3vw, 34px);
  border: 1px solid var(--ink-3);
  background: rgba(14, 58, 44, .38);
}

.page-contact .mail-acc .acc__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: transparent;
  color: var(--lime);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.page-contact .mail-acc .acc__trigger:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

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

.page-contact .mail-acc .acc__sign::before,
.page-contact .mail-acc .acc__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--lime);
}

.page-contact .mail-acc .acc__sign::after {
  transform: rotate(90deg);
  transition: transform .2s var(--ease);
}

.page-contact .mail-acc .acc__trigger[aria-expanded="true"] .acc__sign::after {
  transform: rotate(0deg);
}

.page-contact .mail-acc .acc__panel {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
}

.page-contact .mail-tpl {
  margin: 16px 0 14px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  color: var(--fog);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- 旧版查信息 ---------- */

.page-contact .legacy {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--alert);
  background: linear-gradient(120deg, rgba(255, 107, 61, .06), transparent 45%), var(--ink-1);
}

.page-contact .legacy__note {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--moss);
  max-width: 34em;
}

.page-contact .legacy__note a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .legacy__note a:hover {
  color: var(--lime-mist);
}

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

.page-contact .facts__row {
  display: grid;
  gap: 4px;
  padding-block: 13px;
  border-bottom: 1px solid var(--line);
}

.page-contact .facts__k {
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--moss);
}

.page-contact .facts__v {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fog);
  overflow-wrap: anywhere;
}

/* ---------- 合作 ---------- */

.page-contact .partners {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-contact .partner-card {
  padding: 22px 20px 20px;
  background: linear-gradient(155deg, var(--ink-2), var(--ink-1) 72%);
  border-top: 2px solid var(--ink-3);
}

.page-contact .partner-card:nth-child(odd) {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-contact .partner-card:nth-child(even) {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-contact .partner-card__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--fog);
}

.page-contact .partner-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
}

.page-contact .partner-card__tag {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lime);
}

/* ---------- 位置与备案 ---------- */

.page-contact .where {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-contact .facts--wide {
  border-top-color: var(--ink-3);
}

.page-contact .facts--wide .facts__v {
  font-family: var(--font-sans);
}

/* ---------- 相关页面 ---------- */

.page-contact .contact-next-wrap {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-contact .contact-next {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-next__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background .18s var(--ease);
}

.page-contact .contact-next__link:hover .contact-next__title {
  color: var(--lime);
}

.page-contact .contact-next__no {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
  padding-top: 3px;
}

.page-contact .contact-next__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--fog);
  transition: color .18s var(--ease);
}

.page-contact .contact-next__desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--moss);
}

/* ---------- 媒体容器补充 ---------- */

.page-contact .media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--ink-2), var(--ink-0));
}

.page-contact .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-contact .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--moss);
  border-top: 1px solid var(--line);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .facts__row {
    grid-template-columns: minmax(110px, .32fr) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

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

@media (min-width: 768px) {
  .page-contact .contact-line {
    grid-template-columns: minmax(0, 12em) minmax(0, 1fr) auto;
    grid-template-areas: "label value btn";
    align-items: baseline;
    gap: clamp(16px, 3vw, 36px);
  }

  .page-contact .contact-line__btn {
    align-self: center;
  }

  .page-contact .contact-hero__bg {
    opacity: .5;
  }
}

@media (min-width: 900px) {
  .page-contact .channels {
    grid-template-columns: minmax(0, .74fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .mail-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .58fr);
    align-items: start;
  }

  .page-contact .mail-grid__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-contact .legacy {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .where {
    grid-template-columns: minmax(0, .62fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-contact .contact-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(16px, 2.4vw, 32px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-tab,
  .page-contact .channel-tab::before,
  .page-contact .contact-next__title,
  .page-contact .mail-acc .acc__sign::after {
    transition: none;
  }
}