.page-contact {
  --pc-line: var(--mist);
  --pc-ease: var(--ease);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 48px;
  background: var(--lake-deep);
  color: var(--ice);
}

.page-contact .contact-hero-media {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.page-contact .contact-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .34;
  filter: saturate(.8) contrast(1.06);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(6, 47, 71, .68) 0%, rgba(6, 47, 71, .9) 56%, rgba(6, 47, 71, .98) 100%),
    radial-gradient(120% 80% at 12% 0%, rgba(200, 160, 46, .16) 0%, rgba(200, 160, 46, 0) 62%);
  pointer-events: none;
}

.page-contact .contact-hero-inner {
  position: relative;
  z-index: 3;
}

.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: rgba(244, 246, 244, .72);
}

.page-contact .breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-contact .breadcrumbs li + li::before {
  content: "/";
  color: rgba(191, 208, 216, .55);
}

.page-contact .breadcrumbs a {
  color: rgba(244, 246, 244, .72);
  text-decoration: none;
  transition: color var(--t-fast) var(--pc-ease);
}

.page-contact .breadcrumbs a:hover {
  color: var(--metal);
}

.page-contact .breadcrumbs a[aria-current="page"] {
  color: var(--metal);
}

.page-contact h1 {
  margin: 0 0 18px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 6vw, 46px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-contact .contact-hero-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 246, 244, .86);
}

/* ---------- 邮箱框景 ---------- */
.page-contact .mailbox {
  position: relative;
  margin-top: 34px;
  padding: 20px 18px 18px;
  border: 1px solid rgba(191, 208, 216, .38);
  border-left: 3px solid var(--metal);
  background: rgba(6, 47, 71, .66);
}

.page-contact .mailbox::before,
.page-contact .mailbox::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--metal);
  pointer-events: none;
}

.page-contact .mailbox::before {
  top: -1px;
  left: -1px;
  border-right-color: transparent;
  border-bottom-color: transparent;
}

.page-contact .mailbox::after {
  right: -1px;
  bottom: -1px;
  border-left-color: transparent;
  border-top-color: transparent;
}

.page-contact .mailbox-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(191, 208, 216, .22);
}

.page-contact .mailbox-label {
  flex: 0 0 76px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-contact .mailbox-value {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
  word-break: break-all;
}

.page-contact .mailbox-value--mail {
  color: var(--metal);
  text-decoration: none;
  border-bottom: 1px solid rgba(235, 203, 106, .5);
}

.page-contact .mailbox-value--mail:hover {
  border-bottom-color: var(--metal);
}

.page-contact .mailbox-copy {
  margin-left: auto;
}

.page-contact .mailbox-note {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 1px solid rgba(200, 160, 46, .5);
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: .01em;
  color: rgba(244, 246, 244, .8);
}

/* ---------- 通用章节头 ---------- */
.page-contact .contact-head {
  margin-bottom: 30px;
}

.page-contact .contact-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--lake-deep);
}

.page-contact .contact-head p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 合作类型 ---------- */
.page-contact .coop {
  padding: 52px 0;
  background: var(--ice);
}

.page-contact .coop-layout {
  display: grid;
  gap: 34px;
}

.page-contact .coop-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pc-line);
}

.page-contact .coop-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 24px 0;
  border-bottom: 1px solid var(--pc-line);
  align-items: start;
}

.page-contact .coop-no {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--barley);
}

.page-contact .coop-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--lake-deep);
}

.page-contact .coop-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-contact .coop-gain {
  margin: 14px 0 0;
  padding: 10px 14px;
  background: rgba(237, 230, 212, .78);
  border-left: 2px solid var(--barley);
  font-size: 14px;
  line-height: 1.7;
  color: var(--lake-deep);
}

.page-contact .coop-gain .num {
  font-size: 1.15em;
  color: var(--lake);
}

.page-contact .coop-prep {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--lake);
}

.page-contact .coop-prep-label {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--sand);
  background: var(--lake);
}

.page-contact .coop-figure {
  margin: 0;
  border: 1px solid var(--pc-line);
  background: var(--white);
}

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

.page-contact .coop-figure .media-caption {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: .02em;
  color: var(--lake);
}

/* ---------- 接口申请 ---------- */
.page-contact .apply {
  padding: 52px 0;
  background: var(--lake);
  color: var(--ice);
}

.page-contact .apply .contact-head h2 {
  color: var(--white);
}

.page-contact .apply .contact-head p {
  color: rgba(244, 246, 244, .82);
}

.page-contact .apply-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(191, 208, 216, .3);
  max-width: 860px;
}

.page-contact .apply-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(191, 208, 216, .3);
  align-items: start;
}

.page-contact .apply-no {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--metal);
}

.page-contact .apply-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-contact .apply-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 246, 244, .82);
}

.page-contact .apply-body .num {
  color: var(--metal);
}

/* ---------- 响应节奏 ---------- */
.page-contact .cadence {
  padding: 52px 0;
  background: var(--sand);
}

.page-contact .timeband {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(11, 74, 111, .25);
}

.page-contact .timeband-item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 22px 0 22px 20px;
  border-bottom: 1px solid rgba(11, 74, 111, .25);
}

.page-contact .timeband-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--mist);
  transition: background var(--t-slow) var(--pc-ease);
}

.page-contact .timeband-item.is-revealed::before {
  background: var(--barley);
}

.page-contact .timeband-value {
  font-family: var(--font-mono);
  font-size: 27px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--lake-deep);
}

.page-contact .timeband-label {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--lake);
}

/* ---------- 常见问题 ---------- */
.page-contact .faq {
  padding: 52px 0;
  background: var(--white);
}

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

.page-contact .faq-item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .faq-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: -.01em;
  color: var(--lake-deep);
}

.page-contact .faq-item p {
  margin: 0;
  max-width: 78ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 归属与备案 ---------- */
.page-contact .registry {
  padding: 52px 0;
  background: var(--sand);
}

.page-contact .registry-layout {
  display: grid;
  gap: 30px;
}

.page-contact .registry-plate {
  position: relative;
  margin: 0;
  padding: 22px 20px;
  background: var(--white);
  border: 1px solid var(--pc-line);
  border-top: 3px solid var(--lake);
}

.page-contact .plate-title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--pc-line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--lake);
}

.page-contact .registry-list {
  margin: 0;
}

.page-contact .registry-row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(191, 208, 216, .55);
}

.page-contact .registry-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .registry-row dt {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--lake);
}

.page-contact .registry-row dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--lake-deep);
  word-break: break-all;
}

.page-contact .registry-body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--lake-deep);
}

.page-contact .registry-body p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-contact .registry-body p:last-child {
  margin-bottom: 0;
}

.page-contact .registry-body a {
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--t-fast) var(--pc-ease);
}

.page-contact .registry-body a:hover {
  color: var(--sunset);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: calc(var(--header-h) + 68px) 0 64px;
  }

  .page-contact .mailbox {
    padding: 26px 28px 22px;
  }

  .page-contact .mailbox-row {
    gap: 4px 20px;
  }

  .page-contact .mailbox-label {
    flex: 0 0 88px;
  }

  .page-contact .coop,
  .page-contact .apply,
  .page-contact .cadence,
  .page-contact .faq,
  .page-contact .registry {
    padding: 76px 0;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-contact .coop-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .coop-item {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 2px 20px;
    padding: 28px 0;
  }

  .page-contact .coop-no {
    font-size: 32px;
  }

  .page-contact .coop-figure {
    margin-top: 4px;
  }

  .page-contact .timeband {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .timeband-item {
    padding: 30px 24px 28px 0;
    border-bottom: 0;
    border-right: 1px solid rgba(11, 74, 111, .25);
  }

  .page-contact .timeband-item:last-child {
    border-right: 0;
    padding-right: 0;
  }

  .page-contact .timeband-item::before {
    left: 0;
    top: -1px;
    width: 100%;
    height: 3px;
  }

  .page-contact .faq-item {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.55fr);
    gap: 40px;
    align-items: start;
    padding: 28px 0;
  }

  .page-contact .registry-layout {
    grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
    gap: 56px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .timeband-item::before,
  .page-contact .breadcrumbs a,
  .page-contact .registry-body a {
    transition: none;
  }
}