.page-contact {
  --pc-gap: clamp(18px, 3vw, 36px);
  --pc-narrow: 640px;
  display: block;
  color: var(--shell);
}

.page-contact .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.page-contact a {
  color: inherit;
}

.page-contact .pc-crumb-wrap {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--mist);
}

.page-contact .crumbs li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--clay);
}

.page-contact .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .crumbs a:hover {
  color: var(--glow);
  border-bottom-color: var(--glow);
}

.page-contact .crumbs [aria-current="page"] {
  color: var(--shell);
}

/* 首屏 */
.page-contact .pc-hero {
  max-width: 78ch;
}

.page-contact .pc-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--shell);
}

.page-contact .pc-hero .lede {
  max-width: 62ch;
  margin: 0 0 clamp(24px, 4vw, 40px);
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .pc-banner {
  position: relative;
  margin: 0;
}

.page-contact .pc-banner .media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(69, 224, 206, 0.16), transparent 58%),
    linear-gradient(160deg, var(--tide) 0%, var(--ink) 88%);
  aspect-ratio: 16 / 9;
}

.page-contact .pc-banner .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.86;
}

.page-contact .media-caption {
  margin: 10px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clay);
}

/* 章节通用 */
.page-contact .pc-sec {
  margin-top: clamp(46px, 7vw, 92px);
}
.page-contact .pc-sec:first-of-type {
  margin-top: clamp(38px, 6vw, 74px);
}

.page-contact .pc-head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "aside aside";
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-contact .pc-head .chapter-no {
  grid-area: no;
  font-size: clamp(24px, 4vw, 34px);
  color: var(--glow);
  line-height: 1;
}

.page-contact .pc-head .chapter-title {
  grid-area: title;
  margin: 0;
  font-size: clamp(19px, 2.9vw, 27px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--shell);
}

.page-contact .pc-head .chapter-aside {
  grid-area: aside;
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

/* 01 联络卡与侧注 */
.page-contact .pc-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .pc-card {
  background: var(--rock);
  color: var(--ink);
  border-radius: var(--radius);
  padding: clamp(22px, 3.6vw, 38px);
  box-shadow: 0 18px 44px -32px rgba(0, 0, 0, 0.9);
}

.page-contact .pc-kicker {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--deep);
}

.page-contact .pc-mail {
  display: inline-block;
  max-width: 100%;
  font-size: clamp(17px, 2.5vw, 24px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.05em;
  word-break: break-all;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid var(--deep);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .pc-mail:hover,
.page-contact .pc-mail:focus-visible {
  color: var(--deep);
  border-bottom-color: var(--glow);
}

.page-contact .pc-tel {
  display: inline-block;
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 2px solid var(--deep);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .pc-tel:hover,
.page-contact .pc-tel:focus-visible {
  border-bottom-color: var(--coral);
}

.page-contact .pc-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: #2c4453d9;
  max-width: 40ch;
}

.page-contact .pc-rule {
  height: 0;
  border: 0;
  border-top: 1px dashed rgba(28, 74, 99, 0.32);
  margin: 22px 0;
}

.page-contact .pc-addr {
  border-left: 3px solid var(--clay);
  padding-left: 14px;
  transition: border-color 0.24s var(--ease);
}

.page-contact .pc-addr:hover {
  border-left-color: var(--coral);
}

.page-contact .pc-addr-text {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--ink);
}

.page-contact .pc-side {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 48, 69, 0.92), rgba(10, 27, 41, 0.92));
  padding: clamp(20px, 3vw, 32px);
}

.page-contact .pc-side p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .pc-side a {
  color: var(--shell);
  text-decoration: none;
  border-bottom: 1px solid var(--deep);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .pc-side a:hover,
.page-contact .pc-side a:focus-visible {
  color: var(--glow);
  border-bottom-color: var(--glow);
}

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

.page-contact .pc-side-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .pc-side-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--clay);
}

/* 02 邮件写作 */
.page-contact .pc-mailgrid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  align-items: start;
}

.page-contact .pc-prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
  max-width: var(--pc-narrow);
}

.page-contact .pc-steps {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  counter-reset: pcstep;
  display: grid;
  gap: 12px;
  max-width: var(--pc-narrow);
}

.page-contact .pc-steps li {
  counter-increment: pcstep;
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.75;
  color: var(--shell);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .pc-steps li::before {
  content: counter(pcstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--glow);
  padding-top: 3px;
}

.page-contact .pc-tmpl {
  background: var(--tide);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .pc-tmpl:hover {
  background: var(--deep);
  border-color: var(--mist);
}

.page-contact .pc-tmpl-label {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--clay);
}

.page-contact .pc-tmpl-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 0;
  border-top: 1px dashed rgba(159, 191, 191, 0.22);
}

.page-contact .pc-tmpl-key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .pc-tmpl-val {
  font-size: 13.5px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--shell);
  word-break: break-word;
}

.page-contact .pc-tmpl-subject {
  font-weight: 700;
  color: var(--glow);
}

.page-contact .pc-figure {
  margin: 22px 0 0;
}

.page-contact .pc-figure .media-frame {
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background:
    repeating-linear-gradient(0deg, rgba(159, 191, 191, 0.12) 0 1px, transparent 1px 22px),
    var(--ink);
  aspect-ratio: 4 / 3;
}

.page-contact .pc-figure .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 03 数据纠错 */
.page-contact .pc-narrow {
  max-width: var(--pc-narrow);
}

.page-contact .pc-narrow p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-contact .pc-checks {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .pc-check-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--shell);
  background: rgba(18, 48, 69, 0.5);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-contact .pc-check-item:hover {
  border-color: var(--mist);
  background: var(--tide);
}

.page-contact .pc-check-item .mono {
  font-size: 12px;
  color: var(--glow);
  padding-top: 2px;
}

/* 04 合作 */
.page-contact .pc-lead-in {
  max-width: 70ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
}

.page-contact .pc-partner {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: linear-gradient(170deg, rgba(28, 74, 99, 0.55), rgba(18, 48, 69, 0.9));
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-contact .pc-partner:hover {
  border-color: var(--mist);
}

.page-contact .pc-partner h3 {
  margin: 0 0 12px;
  font-size: clamp(17px, 2.3vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--shell);
}

.page-contact .pc-partner p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .pc-partner a {
  color: var(--shell);
  text-decoration: none;
  border-bottom: 1px solid var(--deep);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .pc-partner a:hover,
.page-contact .pc-partner a:focus-visible {
  color: var(--glow);
  border-bottom-color: var(--glow);
}

.page-contact .pc-partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .pc-partner-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .pc-partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moss);
}

.page-contact .pc-narrow-note {
  max-width: var(--pc-narrow);
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--clay);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* 05 回复节奏 */
.page-contact .pc-flow {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .pc-flow-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: start;
}

.page-contact .pc-flow-no {
  font-size: 15px;
  color: var(--glow);
  line-height: 1.5;
}

.page-contact .pc-flow-item h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--shell);
}

.page-contact .pc-flow-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 62ch;
}

.page-contact .pc-close {
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(110% 120% at 92% 0%, rgba(255, 106, 69, 0.16), transparent 56%),
    var(--tide);
  display: grid;
  gap: 18px;
  align-items: start;
}

.page-contact .pc-close p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--shell);
  max-width: 54ch;
}

.page-contact .pc-close .btn {
  justify-self: start;
  text-decoration: none;
}

/* 桌面 */
@media (min-width: 860px) {
  .page-contact .pc-head {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "no title aside";
    gap: 0 18px;
    align-items: baseline;
  }

  .page-contact .pc-split {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-contact .pc-side {
    margin-top: clamp(28px, 5vw, 64px);
  }

  .page-contact .pc-mailgrid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

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

  .page-contact .pc-partner:nth-child(2) {
    margin-top: clamp(20px, 3vw, 40px);
  }

  .page-contact .pc-close {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1120px) {
  .page-contact .pc-hero .lede {
    font-size: 18px;
  }

  .page-contact .pc-flow-item {
    grid-template-columns: 56px 1fr;
    padding: 24px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition: none !important;
  }
}