.page-contact {
  --contact-line: var(--ink-700);
  --contact-surface: var(--ink-900);
  --contact-surface-2: var(--ink-800);
  --contact-glow: rgba(43, 230, 224, 0.16);
  --contact-warm: rgba(255, 91, 35, 0.14);
  scroll-behavior: smooth;
}

.page-contact .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 22px 0 6px;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-contact .crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

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

.page-contact .crumbs__sep {
  color: var(--ink-700);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 30px;
  padding: 26px 0 54px;
  position: relative;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -10%;
  width: 60%;
  height: 320px;
  background: linear-gradient(125deg, rgba(255, 91, 35, 0.14) 0%, rgba(255, 91, 35, 0) 62%);
  clip-path: polygon(0 0, 100% 0, 100% 74%, 22% 100%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero__copy {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 7.4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.032em;
  color: var(--paper);
}

.page-contact .contact-hero__title em {
  font-style: normal;
  color: var(--orange);
  display: block;
}

.page-contact .contact-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--contact-line);
}

.page-contact .fact:first-child {
  border-left-color: var(--orange);
}

.page-contact .fact__num {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .fact__cap {
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .contact-hero__figure {
  position: relative;
  z-index: 1;
  margin: 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), 12% 100%, 0 calc(100% - 22px));
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
  aspect-ratio: 16 / 9;
}

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

/* ---------- 联系面板 ---------- */
.page-contact .contact-desk {
  padding: 0 0 24px;
}

.page-contact .router-body {
  display: grid;
  gap: 20px;
}

.page-contact .idcard {
  padding: 28px 24px;
  background: var(--contact-surface);
  border: 1px solid var(--contact-line);
}

.page-contact .idcard .eyebrow {
  color: var(--cyan);
  margin: 0 0 18px;
}

.page-contact .idcard__list {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-contact .idcard__row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .idcard__row:last-child {
  border-bottom: none;
}

.page-contact .idcard__key {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .idcard__val {
  margin: 0;
  font-size: 1rem;
  color: var(--paper);
  line-height: 1.6;
  word-break: break-word;
}

.page-contact .idcard__val--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  user-select: all;
}

.page-contact .idcard__note {
  margin: 22px 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--muted);
  border-left: 3px solid var(--orange);
  padding-left: 14px;
}

.page-contact .router {
  padding: 26px 22px;
  background: var(--ink-950);
  border: 1px solid var(--contact-line);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-contact .router .eyebrow {
  color: var(--muted);
  margin: 0;
}

.page-contact .router__title {
  margin: 10px 0 20px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .tab-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-contact .tab {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--contact-line);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .tab:hover {
  color: var(--cyan);
  border-color: rgba(43, 230, 224, 0.5);
}

.page-contact .tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .router-body:has(#tab-data:target) .tab[href="#tab-data"],
.page-contact .router-body:has(#tab-access:target) .tab[href="#tab-access"],
.page-contact .router-body:has(#tab-collab:target) .tab[href="#tab-collab"],
.page-contact .router-body:has(#tab-quote:target) .tab[href="#tab-quote"] {
  background: var(--contact-warm);
  border-color: var(--orange);
  color: var(--paper);
}

.page-contact .tab-panel {
  display: none;
  animation: contact-fade 0.34s var(--ease) both;
}

.page-contact .tab-panel:target {
  display: block;
}

.page-contact .tab-stage:not(:has(.tab-panel:target)) .tab-panel:first-child {
  display: block;
}

.page-contact .tab-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

@keyframes contact-fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-contact .tab-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .tab-panel__lead {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-contact .check-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--paper);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--contact-line);
}

.page-contact .check-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-contact .check-list__idx {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  flex-shrink: 0;
}

.page-contact .tab-panel__foot {
  margin: 18px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .tab-panel__foot .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  user-select: all;
}

.page-contact .tab-panel__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 230, 224, 0.4);
}

.page-contact .tab-panel__foot a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 提交指引 ---------- */
.page-contact .submit-guide {
  padding: 56px 0 8px;
}

.page-contact .submit-guide__grid {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-contact .submit-guide__figure {
  margin: 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), 0 100%);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-950));
  position: relative;
}

.page-contact .submit-guide__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-contact .submit-guide__figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font-size: 0.8125rem;
  color: var(--paper);
  background: linear-gradient(to top, rgba(6, 11, 24, 0.94), rgba(6, 11, 24, 0));
}

.page-contact .submit-guide__body p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .flow-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .flow-list__item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--contact-surface);
  border-left: 3px solid var(--orange);
}

.page-contact .flow-list__item:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-contact .flow-list__item:nth-child(3) {
  border-left-color: var(--ink-700);
}

.page-contact .flow-list__idx {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .flow-list__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--paper);
}

/* ---------- 合作 ---------- */
.page-contact .collab {
  padding: 62px 0 10px;
}

.page-contact .collab__intro {
  max-width: 60ch;
}

.page-contact .collab__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4.4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.028em;
  color: var(--paper);
}

.page-contact .collab__lead {
  margin: 16px 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .collab__grid {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .collab-card {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--contact-surface-2);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  transition: background-color 0.25s var(--ease);
}

.page-contact .collab-card:hover {
  background: var(--ink-800);
}

.page-contact .collab-card__tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-contact .collab-card__title {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .collab-card__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 提交之后 ---------- */
.page-contact .after-submit {
  padding: 62px 0 34px;
}

.page-contact .stage-track {
  margin: 22px 0 -6px;
  opacity: 0.85;
}

.page-contact .stage-track svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 40px;
}

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

.page-contact .stage {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--contact-surface);
  border-top: 2px solid var(--contact-line);
}

.page-contact .stage:nth-child(1) { border-top-color: var(--orange); }
.page-contact .stage:nth-child(2) { border-top-color: var(--orange); }
.page-contact .stage:nth-child(3) { border-top-color: var(--cyan); }

.page-contact .stage__idx {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink-700);
  display: block;
}

.page-contact .stage__title {
  margin: 8px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-contact .stage__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .after-submit__foot {
  margin: 26px 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .after-submit__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 230, 224, 0.4);
}

.page-contact .after-submit__foot a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: 34px 0 62px;
  }

  .page-contact .idcard {
    padding: 34px 32px;
  }

  .page-contact .idcard__row {
    flex-direction: row;
    align-items: baseline;
    gap: 20px;
  }

  .page-contact .idcard__key {
    flex: 0 0 108px;
  }

  .page-contact .router {
    padding: 30px 28px;
  }

  .page-contact .submit-guide__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: 34px;
  }

  .page-contact .collab__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .stage-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
    gap: 52px;
    padding: 42px 0 76px;
  }

  .page-contact .contact-hero__figure {
    aspect-ratio: 4 / 3;
    min-height: 340px;
  }

  .page-contact .router-body {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
    gap: 26px;
  }

  .page-contact .router {
    padding: 34px 32px 36px;
  }

  .page-contact .submit-guide__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 46px;
  }

  .page-contact .collab {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 48px;
    align-items: start;
    padding-top: 78px;
  }

  .page-contact .collab__grid {
    margin-top: 0;
  }

  .page-contact .stage-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .stage-track {
    margin: 26px 0 -22px;
  }
}

@media (min-width: 1280px) {
  .page-contact .contact-hero {
    gap: 68px;
  }

  .page-contact .router-body {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .tab-panel {
    animation: none;
  }

  .page-contact .tab,
  .page-contact .collab-card,
  .page-contact .crumbs a {
    transition: none;
  }

  .page-contact {
    scroll-behavior: auto;
  }
}