.page-contact {
  --contact-panel-a: rgba(11, 27, 51, .86);
  --contact-panel-b: rgba(16, 41, 36, .92);
  --contact-softline: rgba(38, 67, 60, .78);
}

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

.page-contact .contact-breadcrumb {
  padding-top: 18px;
  padding-bottom: 2px;
}

.page-contact .contact-breadcrumb .breadcrumb {
  font-size: var(--fs-1);
  color: var(--muted);
}

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

.page-contact .contact-breadcrumb .breadcrumb a:hover {
  color: var(--lime);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  padding-top: 6px;
  position: relative;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 340px;
  background:
    radial-gradient(circle at 82% 8%, rgba(72, 227, 203, .13), transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(201, 255, 77, .09), transparent 40%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  gap: 22px;
  align-items: center;
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-5);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 10px 0 14px;
  color: var(--text);
  max-width: 20em;
}

.page-contact .contact-hero .lead {
  max-width: 34em;
}

.page-contact .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-contact .contact-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--grid);
  background: var(--board);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.82) contrast(1.06);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(72, 227, 203, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(72, 227, 203, .09) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

/* ---------- 反馈类型与渠道 ---------- */

.page-contact .desk-section .section-head {
  max-width: 46em;
}

.page-contact .type-visual {
  margin: 0 0 var(--gap);
  position: relative;
  border: 1px solid var(--grid);
  background: var(--board);
  overflow: hidden;
}

.page-contact .type-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-contact .type-visual figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 6px 12px;
  background: rgba(6, 18, 15, .84);
  border-left: 2px solid var(--lime);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-contact .contact-desk {
  display: grid;
  gap: var(--gap);
}

.page-contact .desk-cards {
  display: grid;
  gap: var(--gap);
}

.page-contact .desk-card {
  padding: 18px 20px;
  display: grid;
  gap: 12px;
  background: linear-gradient(150deg, var(--contact-panel-b), rgba(6, 18, 15, .96));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-contact .desk-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-contact .desk-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  color: var(--lime);
  border: 1px solid var(--grid);
  background: var(--ink);
  padding: 4px 9px;
  letter-spacing: .06em;
}

.page-contact .desk-card h3 {
  font-size: var(--fs-3);
  font-weight: 700;
  color: var(--text);
  margin: 0;
  letter-spacing: .01em;
}

.page-contact .desk-card > p {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--muted);
}

.page-contact .field-list {
  margin: 0;
  display: grid;
  gap: 7px;
  border-top: 1px dashed var(--contact-softline);
  padding-top: 12px;
}

.page-contact .field-list > div {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-contact .field-list dt {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--teal);
}

.page-contact .field-list dd {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .desk-side {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--grid);
  background: linear-gradient(180deg, var(--contact-panel-a), var(--ink));
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-contact .desk-side::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), var(--teal) 55%, transparent);
}

.page-contact .desk-side__title {
  margin: 0 0 18px;
  font-size: var(--fs-3);
  color: var(--text);
  letter-spacing: .02em;
}

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

.page-contact .channel-item {
  padding-left: 14px;
  border-left: 2px solid var(--grid);
  display: grid;
  gap: 4px;
}

.page-contact .channel-item:hover {
  border-left-color: var(--lime);
}

.page-contact .channel-label {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-contact .channel-value {
  font-size: var(--fs-3);
  font-weight: 700;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .channel-value--mono {
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  font-weight: 500;
  color: var(--teal);
  letter-spacing: 0;
}

.page-contact .channel-note {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--muted);
  line-height: 1.7;
}

.page-contact .hours-box {
  margin-top: 22px;
  padding: 16px 16px 18px;
  background: var(--board);
  border-top: 2px solid var(--amber);
}

.page-contact .hours-box h4 {
  margin: 0 0 6px;
  font-size: var(--fs-1);
  letter-spacing: .16em;
  color: var(--amber);
  font-weight: 600;
}

.page-contact .hours-box .hours-value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-3);
  color: var(--text);
}

.page-contact .hours-box p {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--muted);
  line-height: 1.75;
}

.page-contact .hours-box p + p {
  margin-top: 6px;
}

/* ---------- 处理流程 ---------- */

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

.page-contact .flow-node {
  position: relative;
}

.page-contact .flow-node > details {
  border: 1px solid var(--grid);
  background: var(--contact-panel-b);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-contact .flow-node > details[open] {
  border-color: var(--teal);
}

.page-contact .flow-node summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
}

.page-contact .flow-node summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-node__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  background: var(--ink);
  border: 1px solid var(--teal);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-contact .flow-node > details[open] .flow-node__index {
  border-color: var(--lime);
  color: var(--lime);
}

.page-contact .flow-node__name {
  font-size: var(--fs-3);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-contact .flow-node details p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: var(--fs-1);
  color: var(--muted);
  line-height: 1.78;
}

/* ---------- 合作洽谈 ---------- */

.page-contact .coop-section .section-head {
  max-width: 48em;
}

.page-contact .coop-grid {
  display: grid;
  gap: var(--gap);
}

.page-contact .coop-card {
  position: relative;
  padding: 20px;
  border: 1px solid var(--grid);
  border-top-width: 3px;
  background: linear-gradient(170deg, var(--contact-panel-a), rgba(6, 18, 15, .96));
}

.page-contact .coop-card--lime {
  border-top-color: var(--lime);
}

.page-contact .coop-card--amber {
  border-top-color: var(--amber);
}

.page-contact .coop-card--teal {
  border-top-color: var(--teal);
}

.page-contact .coop-index {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-2);
  color: var(--muted);
  margin-bottom: 10px;
  letter-spacing: .1em;
}

.page-contact .coop-card h3 {
  margin: 0 0 10px;
  font-size: var(--fs-3);
  color: var(--text);
}

.page-contact .coop-card p {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--muted);
  line-height: 1.78;
}

.page-contact .coop-prep {
  margin-top: calc(var(--gap) * 2);
  padding: 20px;
  border-left: 3px solid var(--lime);
  background: var(--board);
}

.page-contact .coop-prep h3 {
  margin: 0 0 12px;
  font-size: var(--fs-3);
  color: var(--text);
}

.page-contact .coop-prep ul {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .coop-prep li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-1);
  color: var(--text);
  line-height: 1.72;
}

.page-contact .coop-prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}

.page-contact .coop-prep > p {
  margin: 0;
  font-size: var(--fs-1);
  color: var(--muted);
}

/* ---------- 提交前检查 ---------- */

.page-contact .check-strip {
  position: relative;
  padding: 24px 20px;
  border: 1px solid var(--grid);
  background: linear-gradient(120deg, var(--board), var(--ink));
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-contact .check-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 90% 10%, rgba(201, 255, 77, .16), transparent 44%);
  pointer-events: none;
}

.page-contact .check-strip__head {
  position: relative;
}

.page-contact .check-strip__head .section-title {
  margin-top: 8px;
}

.page-contact .check-strip__head .lead {
  margin-bottom: 18px;
}

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

.page-contact .check-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  background: rgba(6, 18, 15, .68);
  border-left: 2px solid var(--teal);
  font-size: var(--fs-1);
  color: var(--text);
  line-height: 1.7;
}

.page-contact .check-num {
  font-family: var(--font-mono);
  font-size: var(--fs-1);
  color: var(--amber);
  text-align: center;
  border: 1px solid var(--grid);
  line-height: 22px;
}

.page-contact .check-tail {
  margin: 20px 0 0;
  font-size: var(--fs-1);
  color: var(--muted);
  line-height: 1.85;
  max-width: 62em;
}

.page-contact .check-tail a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--contact-softline);
}

.page-contact .check-tail a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-contact .type-visual img {
    aspect-ratio: 16 / 9;
  }

  .page-contact .field-list > div {
    grid-template-columns: 84px minmax(0, 1fr);
  }

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

@media (min-width: 960px) {
  .page-contact h1 {
    font-size: var(--fs-6);
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 44px;
  }

  .page-contact .contact-hero {
    padding-top: 12px;
  }

  .page-contact .type-visual img {
    aspect-ratio: 21 / 9;
  }

  .page-contact .contact-desk {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
    gap: calc(var(--gap) * 1.6);
  }

  .page-contact .desk-side {
    position: sticky;
    top: calc(var(--header-h) + 16px);
  }

  .page-contact .flow-bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }

  .page-contact .flow-node:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 36px;
    right: -28px;
    width: 28px;
    height: 1px;
    background: var(--grid);
  }

  .page-contact .flow-node summary {
    padding: 18px 18px 14px;
  }

  .page-contact .flow-node details p {
    padding: 0 18px 18px;
  }

  .page-contact .coop-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-contact .check-strip {
    display: grid;
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 36px;
    align-items: center;
    padding: 36px 32px;
  }

  .page-contact .check-strip__head .lead {
    margin-bottom: 0;
  }

  .page-contact .coop-prep {
    padding: 26px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .flow-node > details,
  .page-contact .coop-card,
  .page-contact .desk-card {
    transition: none;
  }
}