/* ===================== 联系我们 · 页面专属样式 ===================== */
.page-contact {
  display: block;
  position: relative;
  background-image:
    radial-gradient(820px 520px at 86% -8%, rgba(61, 242, 192, 0.10), transparent 62%),
    radial-gradient(680px 560px at 2% 16%, rgba(31, 107, 126, 0.22), transparent 68%);
  background-repeat: no-repeat;
  padding-bottom: clamp(44px, 7vw, 96px);
}

.page-contact > * {
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  margin: 0 0 clamp(16px, 2.6vw, 28px);
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--moss);
}

.page-contact .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--neon);
}

/* ---------- 通用标题 ---------- */
.page-contact h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.008em;
  color: var(--paper);
  margin: clamp(10px, 1.6vw, 16px) 0 clamp(12px, 1.8vw, 18px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: clamp(22px, 4vw, 46px) 0 clamp(26px, 3.6vw, 44px);
}

.page-contact .hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(46px, 10vw, 92px);
  line-height: 1;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: clamp(8px, 1.4vw, 16px) 0 0;
}

.page-contact .contact-hero .lede {
  max-width: 54ch;
  margin-top: clamp(18px, 2.6vw, 30px);
  color: rgba(243, 236, 221, 0.78);
}

/* ---------- 联系卡 ---------- */
.page-contact .reach {
  padding-top: clamp(8px, 1.6vw, 20px);
}

.page-contact .deck-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 30px);
  align-items: start;
}

.page-contact .deck-main {
  padding: clamp(20px, 3.2vw, 42px);
  border-radius: var(--radius);
}

.page-contact .deck-title {
  font-size: clamp(22px, 3.2vw, 30px);
  margin: clamp(10px, 1.6vw, 16px) 0 0;
}

.page-contact .channel-list {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel {
  padding-top: clamp(14px, 2vw, 22px);
  border-top: 1px solid var(--hair);
}

.page-contact .channel:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .channel__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .channel__value {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(18px, 3.6vw, 30px);
  line-height: 1.3;
  color: var(--paper);
  text-decoration: none;
  overflow-wrap: anywhere;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-contact a.channel__value:hover,
.page-contact a.channel__value:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-contact .channel__meta {
  display: block;
  margin-top: 10px;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .deck-aside {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
}

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

.page-contact .deck-aside .img-frame__cap {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  padding: 10px 14px 0;
}

/* ---------- 邮件标题 ---------- */
.page-contact .subject {
  padding-top: clamp(40px, 6.5vw, 92px);
}

.page-contact .subject__body {
  color: rgba(243, 236, 221, 0.76);
  line-height: 1.85;
}

.page-contact .subject-samples {
  display: grid;
  gap: 10px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .subject-samples li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 14px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-contact .subject-samples li:hover {
  border-color: rgba(61, 242, 192, 0.4);
}

.page-contact .subject-samples code {
  font-family: var(--font-mono);
  font-size: clamp(13px, 2.2vw, 15px);
  color: var(--paper);
  background: none;
  padding: 0;
  overflow-wrap: anywhere;
}

/* ---------- 提交类型索引 ---------- */
.page-contact .submit {
  padding-top: clamp(44px, 7vw, 100px);
}

.page-contact .submit-head {
  max-width: 62ch;
}

.page-contact .submit-intro {
  color: rgba(243, 236, 221, 0.76);
  line-height: 1.85;
}

.page-contact .submit-list {
  margin: clamp(24px, 3.6vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--hair);
}

.page-contact .submit-item {
  border-bottom: 1px solid var(--hair);
}

.page-contact .submit-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px clamp(14px, 2.4vw, 26px);
  align-items: start;
  padding: clamp(16px, 2.4vw, 24px) 0;
  cursor: pointer;
  list-style: none;
}

.page-contact .submit-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .submit-item summary::marker {
  content: "";
}

.page-contact .submit-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
  padding-top: 5px;
  transition: color 180ms ease;
}

.page-contact .submit-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.32;
  color: var(--paper);
  transition: color 180ms ease;
}

.page-contact .submit-brief {
  display: block;
  margin-top: 6px;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .submit-chev {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mist);
  padding-top: 5px;
  transition: transform 200ms ease, color 200ms ease;
}

.page-contact .submit-item details[open] .submit-chev {
  transform: rotate(45deg);
  color: var(--neon);
}

.page-contact .submit-item details[open] .submit-num {
  color: var(--neon);
}

.page-contact .submit-item summary:hover .submit-name,
.page-contact .submit-item summary:focus-visible .submit-name {
  color: var(--neon);
}

.page-contact .submit-body {
  padding: 0 0 clamp(20px, 3vw, 32px);
}

.page-contact .submit-body__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .mail-template {
  margin: 0;
  padding: clamp(14px, 2.2vw, 22px);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: clamp(12.5px, 2vw, 14px);
  line-height: 1.8;
  color: rgba(243, 236, 221, 0.86);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-contact .submit-foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .submit-foot a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 192, 0.4);
}

.page-contact .submit-foot a:hover,
.page-contact .submit-foot a:focus-visible {
  border-bottom-color: var(--neon);
}

/* ---------- 回复节奏 ---------- */
.page-contact .cadence {
  padding-top: clamp(44px, 7vw, 100px);
}

.page-contact .cadence-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-contact .cadence-lead p {
  max-width: 46ch;
  color: rgba(243, 236, 221, 0.76);
  line-height: 1.85;
}

.page-contact .cadence-lead p + p {
  margin-top: 14px;
}

.page-contact .cadence-lead a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 192, 0.4);
}

.page-contact .cadence-list {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .cadence-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 28px);
  align-items: baseline;
  padding: clamp(14px, 2vw, 20px) 0;
  border-top: 1px solid var(--hair);
}

.page-contact .cadence-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .cadence-value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1;
  color: var(--neon);
  white-space: nowrap;
}

.page-contact .cadence-unit {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-contact .cadence-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(243, 236, 221, 0.76);
}

/* ---------- 合作与媒体 ---------- */
.page-contact .partners {
  padding-top: clamp(44px, 7vw, 100px);
}

.page-contact .partners-panel {
  padding: clamp(24px, 4vw, 52px);
  border-radius: var(--radius);
}

.page-contact .partners-body {
  margin-top: clamp(16px, 2.4vw, 26px);
  max-width: 62ch;
}

.page-contact .partners-body p {
  color: rgba(243, 236, 221, 0.78);
  line-height: 1.85;
}

.page-contact .partners-body p + p {
  margin-top: 14px;
}

.page-contact .partners-need {
  margin-top: clamp(22px, 3.2vw, 36px);
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--glass-line);
}

.page-contact .partners-need__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

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

.page-contact .partners-need__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 236, 221, 0.86);
}

.page-contact .partners-need__list .num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--neon);
  padding-top: 2px;
}

.page-contact .partners-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
}

/* ---------- 收尾长图 ---------- */
.page-contact .closing-frame {
  margin: clamp(44px, 7vw, 96px) 0 0;
}

.page-contact .closing-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-contact .closing-frame figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-contact .deck-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(26px, 3.4vw, 48px);
  }

  .page-contact .cadence-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-contact .deck-aside {
    position: sticky;
    top: 32px;
  }

  .page-contact .closing-frame {
    margin-left: var(--gutter);
    margin-right: var(--gutter);
  }
}

/* ---------- 窄屏收拢 ---------- */
@media (max-width: 560px) {
  .page-contact .submit-item summary {
    gap: 10px 12px;
  }

  .page-contact .submit-brief {
    max-width: none;
  }

  .page-contact .cadence-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-contact .cadence-value {
    font-size: 30px;
  }

  .page-contact .partners-cta .btn {
    width: 100%;
    text-align: center;
  }
}