.page-contact {
  --card-clip: polygon(22px 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%, 0 22px);
  --card-clip-sm: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  color: var(--paper);
  padding-bottom: 64px;
}

.page-contact *,
.page-contact *::before,
.page-contact *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-top: 18px;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -40px;
  left: 0;
  right: 0;
  height: 340px;
  background:
    repeating-linear-gradient(96deg, rgba(55, 240, 214, .055) 0 1px, transparent 1px 42px),
    radial-gradient(120% 110% at 86% 0%, rgba(43, 168, 201, .24), transparent 64%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-contact .crumbs {
  margin-bottom: 4px;
  font-size: 12px;
}

.page-contact .crumbs span {
  color: var(--stone);
}

.page-contact .contact-hero__head {
  max-width: 780px;
  padding: 12px 0 30px;
}

.page-contact h1 {
  font-family: var(--font-sans);
  font-size: clamp(29px, 6vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: .04em;
  margin: 10px 0 18px;
  color: var(--paper);
}

.page-contact .contact-hero__lede {
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 239, 230, .84);
  margin: 0;
}

/* ---------- 三张通道卡 ---------- */
.page-contact .contact-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  padding-bottom: 10px;
}

.page-contact .ch-card {
  position: relative;
  padding: 1px;
  background: linear-gradient(160deg, rgba(55, 240, 214, .42), rgba(55, 240, 214, .07) 44%, rgba(126, 140, 153, .2));
  clip-path: var(--card-clip);
  transition: transform .3s var(--ease);
}

.page-contact .ch-card:hover {
  transform: translateY(-3px);
}

.page-contact .ch-card__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
  padding: 22px;
  overflow: hidden;
  clip-path: var(--card-clip);
  background: linear-gradient(172deg, var(--deep-2), var(--deep) 82%);
}

.page-contact .ch-card__inner > *:not(.ch-card__bg) {
  position: relative;
  z-index: 1;
}

.page-contact .ch-card__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .17;
  pointer-events: none;
  z-index: 0;
}

.page-contact .ch-card__title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.4;
  margin: 0;
  color: var(--paper);
}

.page-contact .ch-card__desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--stone);
  margin: 0;
}

.page-contact .ch-card__tel {
  align-self: flex-start;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
  padding-bottom: 4px;
  margin: 2px 0 4px;
  overflow-wrap: anywhere;
}

.page-contact .ch-card__tel:hover,
.page-contact .ch-card__tel:focus-visible {
  color: var(--paper);
}

.page-contact .ch-card__addr {
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  margin: 0;
  overflow-wrap: anywhere;
}

.page-contact .copy-btn {
  flex: 0 0 auto;
  align-self: flex-start;
}

/* 邮箱条目 */
.page-contact .ch-card__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .mail-block {
  padding: 2px 0 2px 14px;
  border-left: 2px solid rgba(55, 240, 214, .38);
}

.page-contact .mail-block__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.page-contact .mail-block__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-contact .mail-block__v {
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.4vw, 18px);
  letter-spacing: .01em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .mail-block__note {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 场景 + 节奏 ---------- */
.page-contact .contact-split,
.page-contact .coop,
.page-contact .prep {
  padding-top: 52px;
}

.page-contact .sec-title {
  font-size: clamp(21px, 4vw, 30px);
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-contact .sec-title--sm {
  font-size: clamp(18px, 3.4vw, 22px);
  margin-bottom: 4px;
}

.page-contact .sec-lede {
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
  margin: 0;
  max-width: 40em;
}

.page-contact .contact-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

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

.page-contact .route-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 14px;
  padding: 14px 16px;
  border-left: 2px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(19, 59, 87, .55), rgba(19, 59, 87, 0) 78%);
  transition: border-color .28s var(--ease), background .28s var(--ease), transform .28s var(--ease);
}

.page-contact .route-item:hover,
.page-contact .route-item:focus-within {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(19, 59, 87, .92), rgba(19, 59, 87, 0) 84%);
  transform: translateX(4px);
}

.page-contact .route-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .route-item__main {
  min-width: 0;
}

.page-contact .route-item__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.45;
  margin: 0 0 5px;
  color: var(--paper);
}

.page-contact .route-item__desc {
  margin: 0 0 7px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--stone);
}

.page-contact .route-item__via {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--sand);
  opacity: .62;
  transition: opacity .28s var(--ease);
}

.page-contact .route-item:hover .route-item__via,
.page-contact .route-item:focus-within .route-item__via {
  opacity: 1;
}

/* 回复节奏面板 */
.page-contact .rhythm {
  padding: 20px;
  background: var(--deep-2);
  clip-path: var(--card-clip-sm);
}

.page-contact .rhythm-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 10px 14px;
  margin-top: 10px;
  background: rgba(7, 26, 43, .58);
  border-left: 3px solid var(--sand);
}

.page-contact .rhythm-bar__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-contact .rhythm-bar strong {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--sand);
}

.page-contact .rhythm__sub {
  margin: 22px 0 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cyan-2);
  font-family: var(--font-mono);
}

.page-contact .rhythm-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .rhythm-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(242, 239, 230, .84);
}

.page-contact .rhythm-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--cyan-2);
}

/* ---------- 供稿与合作 ---------- */
.page-contact .coop__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: 24px;
  background: rgba(14, 42, 64, .66);
  border: 1px solid var(--line);
  clip-path: var(--card-clip);
}

.page-contact .coop__lede {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 239, 230, .86);
  margin: 0;
}

.page-contact .coop__body h3 {
  margin: 22px 0 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .coop__body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .coop__body li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.74;
  color: rgba(242, 239, 230, .84);
}

.page-contact .coop__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
  opacity: .7;
}

.page-contact .coop__send {
  margin: 20px 0 0;
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.74;
  color: rgba(242, 239, 230, .88);
  background: rgba(7, 26, 43, .64);
  border-left: 3px solid var(--coral);
}

.page-contact .coop__send .mono {
  color: var(--cyan);
  overflow-wrap: anywhere;
}

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

.page-contact .coop__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  clip-path: var(--card-clip-sm);
}

/* ---------- 前置指引 ---------- */
.page-contact .prep__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.page-contact .prep-card {
  padding: 20px 22px;
  background: var(--deep-2);
  clip-path: var(--card-clip-sm);
}

.page-contact .prep-card h3 {
  margin: 12px 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.45;
  color: var(--paper);
}

.page-contact .prep-card p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--stone);
}

.page-contact .prep__more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 18px;
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-split__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .prep__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero {
    padding-top: 24px;
  }

  .page-contact .contact-hero__head {
    padding: 16px 0 38px;
  }

  .page-contact .contact-channels {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-contact .ch-card--mail {
    grid-column: 1 / 9;
    grid-row: 1 / 3;
  }

  .page-contact .ch-card--tel {
    grid-column: 9 / 13;
    grid-row: 1 / 2;
  }

  .page-contact .ch-card--addr {
    grid-column: 9 / 13;
    grid-row: 2 / 3;
  }

  .page-contact .ch-card__inner {
    padding: 26px 28px;
  }

  .page-contact .ch-card--mail .ch-card__title {
    font-size: 21px;
  }

  .page-contact .rhythm {
    padding: 24px 22px;
  }

  .page-contact .coop__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 40px;
    align-items: center;
    padding: 36px 40px;
  }

  .page-contact .contact-split,
  .page-contact .coop,
  .page-contact .prep {
    padding-top: 68px;
  }
}

@media (min-width: 1240px) {
  .page-contact .coop__grid {
    padding: 42px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ch-card,
  .page-contact .route-item,
  .page-contact .route-item__via {
    transition: none;
  }

  .page-contact .ch-card:hover,
  .page-contact .route-item:hover {
    transform: none;
  }
}