.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 7vw, 96px) 0 clamp(30px, 4vw, 52px);
}

.page-contact .pc-hero__arc {
  position: absolute;
  right: -160px;
  top: -70px;
  width: 540px;
  height: 540px;
  color: var(--turf-300);
  opacity: 0.4;
  pointer-events: none;
}

.page-contact .pc-hero__title {
  position: relative;
  margin: 12px 0 22px;
  max-width: 20ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-contact .pc-hero__lead {
  position: relative;
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.9375rem, 1.5vw, 1.0625rem);
  line-height: 1.85;
  color: var(--ink-600);
}

/* 联系渠道三栏条 */
.page-contact .pc-channels {
  padding: clamp(34px, 4.5vw, 62px) 0 0;
}

.page-contact .pc-channels .section__head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-contact .pc-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line-300);
  background: var(--night-50);
}

.page-contact .pc-channel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 24px 22px 24px;
  border-top: 1px solid var(--line-300);
}

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

.page-contact .pc-channel__label {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--turf-500);
}

.page-contact .pc-channel__value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel__value--mail {
  font-size: clamp(0.8125rem, 3.2vw, 1.0625rem);
  word-break: break-all;
}

.page-contact .pc-channel__value--addr {
  font-family: var(--font-body);
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.6;
}

.page-contact .copy-btn {
  align-self: flex-start;
  padding: 7px 13px;
  border: 1px solid var(--turf-500);
  border-radius: 0;
  background: transparent;
  color: var(--turf-500);
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease;
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--turf-500);
  color: var(--night-50);
}

.page-contact .copy-btn.is-copied {
  background: var(--turf-500);
  border-color: var(--turf-500);
  color: var(--night-50);
}

.page-contact .pc-channel__note {
  margin: 4px 0 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--ink-600);
}

/* 首屏横幅图 */
.page-contact .pc-band {
  margin: clamp(30px, 4.5vw, 58px) 0 0;
}

.page-contact .media-frame {
  position: relative;
  overflow: hidden;
  margin: 0;
  background: var(--pitch-900);
}

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

.page-contact .media-frame__caption {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--ink-600);
}

/* 主体双栏 */
.page-contact .pc-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding-top: clamp(40px, 6vw, 88px);
  padding-bottom: clamp(36px, 5vw, 72px);
}

.page-contact .pc-rail {
  display: none;
}

.page-contact .pc-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-600);
}

.page-contact .chapter-index {
  display: flex;
  flex-direction: column;
}

.page-contact .chapter-index__link {
  display: block;
  margin-left: -1px;
  padding: 7px 0 7px 16px;
  border-left: 2px solid transparent;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-600);
  text-decoration: none;
  transition: color 200ms ease, border-color 200ms ease;
}

.page-contact .chapter-index__link:hover,
.page-contact .chapter-index__link:focus-visible {
  color: var(--ink-900);
}

.page-contact .chapter-index__link.is-active {
  border-left-color: var(--flag-600);
  color: var(--flag-600);
  font-weight: 600;
}

.page-contact .pc-stream {
  min-width: 0;
}

.page-contact .pc-section {
  padding: clamp(40px, 5vw, 72px) 0;
  border-top: 1px solid var(--line-300);
  scroll-margin-top: calc(var(--nav-h) + 48px);
}

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

.page-contact .pc-section .section__head {
  max-width: 60ch;
  margin-bottom: clamp(22px, 3vw, 36px);
}

/* 咨询方向编号小卡 */
.page-contact .pc-tracks {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-300);
  background: var(--line-300);
}

.page-contact .pc-track {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 24px 22px 22px;
  background: var(--night-50);
}

.page-contact .pc-track__no {
  font-family: var(--font-num);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--flag-600);
}

.page-contact .pc-track__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--ink-900);
}

.page-contact .pc-track__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-600);
}

.page-contact .pc-track__jump {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--flag-700);
  text-decoration: none;
}

.page-contact .pc-track__jump:hover,
.page-contact .pc-track__jump:focus-visible {
  color: var(--flag-600);
}

/* 邮件标题提示 */
.page-contact .pc-subject {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-300);
  border-left: 3px solid var(--flag-600);
  background: var(--night-50);
}

.page-contact .pc-subject__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  min-width: 0;
}

.page-contact .pc-subject__example {
  margin: 0;
  min-width: 0;
  font-family: var(--font-num);
  font-size: clamp(0.8125rem, 1.7vw, 0.9375rem);
  letter-spacing: 0.01em;
  color: var(--ink-900);
  overflow-wrap: anywhere;
}

.page-contact .pc-subject__note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dotted var(--line-300);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--ink-600);
}

/* 资料准备清单 */
.page-contact .pc-prep {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-contact .pc-prep__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .pc-prep__list li {
  position: relative;
  padding: 13px 0 13px 34px;
  border-bottom: 1px solid var(--line-300);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--ink-900);
}

.page-contact .pc-prep__list li:first-child {
  border-top: 1px solid var(--line-300);
}

.page-contact .pc-prep__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 18px;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  background: var(--turf-500);
  color: var(--night-50);
  font-size: 0.6875rem;
  line-height: 1;
}

.page-contact .pc-prep__media {
  margin: 0;
}

/* 回复节奏 */
.page-contact .pc-cadence {
  display: grid;
  grid-template-columns: 1fr;
}

.page-contact .pc-cadence__item {
  padding: 20px 0;
  border-top: 1px solid var(--line-300);
}

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

.page-contact .pc-cadence__key {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--flag-700);
}

.page-contact .pc-cadence__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-600);
}

/* 延伸阅读 */
.page-contact .pc-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-300);
  background: var(--line-300);
}

.page-contact .pc-links__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  min-width: 0;
  padding: 22px 20px;
  background: var(--night-100);
  color: inherit;
  text-decoration: none;
  transition: background-color 200ms ease;
}

.page-contact .pc-links__item::before {
  content: "";
  display: block;
  width: 0;
  height: 0;
  margin-bottom: 4px;
  border-left: 9px solid var(--flag-600);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
}

.page-contact .pc-links__item:hover,
.page-contact .pc-links__item:focus-visible {
  background: var(--night-50);
}

.page-contact .pc-links__title {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink-900);
}

.page-contact .pc-links__desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--ink-600);
}

/* 底部返回导航 */
.page-contact .pc-tail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: clamp(36px, 5vw, 64px);
  padding-top: 20px;
  border-top: 1px solid var(--line-300);
}

.page-contact .pc-tail__link {
  padding-bottom: 3px;
  border-bottom: 1px solid var(--line-300);
  font-family: var(--font-num);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--ink-600);
  text-decoration: none;
  transition: color 200ms ease, border-color 200ms ease;
}

.page-contact .pc-tail__link:hover,
.page-contact .pc-tail__link:focus-visible {
  border-bottom-color: var(--flag-600);
  color: var(--flag-600);
}

/* 窄屏抽屉式导航开启时避免横向溢出 */
.page-contact .pc-channel__value,
.page-contact .pc-subject__example,
.page-contact .pc-hero__title {
  overflow-wrap: anywhere;
}

@media (min-width: 720px) {
  .page-contact .pc-tracks {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .pc-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .pc-channels__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .pc-channel {
    border-top: 0;
    border-left: 1px solid var(--line-300);
  }

  .page-contact .pc-channel:first-child {
    border-left: 0;
  }
}

@media (min-width: 760px) {
  .page-contact .pc-cadence {
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line-300);
  }

  .page-contact .pc-cadence__item {
    padding: 24px 22px;
    border-top: 0;
    border-left: 1px solid var(--line-300);
  }

  .page-contact .pc-cadence__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .pc-cadence__item:last-child {
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-contact .pc-prep {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 1024px) {
  .page-contact .pc-hero__title {
    max-width: 22ch;
  }
}

@media (min-width: 1080px) {
  .page-contact .pc-body {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 88px);
  }

  .page-contact .pc-rail {
    display: block;
    position: sticky;
    top: calc(var(--nav-h) + 56px);
    align-self: start;
    padding-left: 1px;
    border-left: 1px solid var(--line-300);
  }

  .page-contact .pc-rail__label {
    padding-left: 16px;
  }

  .page-contact .pc-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 899px) {
  .page-contact .pc-hero__arc {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .copy-btn,
  .page-contact .pc-links__item,
  .page-contact .pc-tail__link,
  .page-contact .chapter-index__link {
    transition: none;
  }
}