.page-contact {
  --contact-cut: 6deg;
  --contact-gap: clamp(28px, 6vw, 64px);
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  padding-top: calc(var(--bar-h) + 20px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.page-contact .breadcrumb a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(40px, 8vw, 88px) 0 clamp(48px, 9vw, 96px);
  overflow: hidden;
}
.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -58deg,
      rgba(201, 242, 74, 0.05) 0 2px,
      transparent 2px 26px
    );
  pointer-events: none;
}
.page-contact .hero-inner {
  position: relative;
}
.page-contact .hero-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--lime);
  padding: 7px 14px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  margin: 0 0 24px;
}
.page-contact .contact-hero h1 {
  margin: 0 0 24px;
  max-width: 15ch;
  color: var(--white);
}
.page-contact .contact-hero .lede {
  max-width: 62ch;
  margin: 0;
  color: var(--stone);
}

/* ---------- 通用章节 ---------- */
.page-contact .section {
  padding: var(--contact-gap) 0;
}
.page-contact .section-head {
  max-width: 68ch;
  margin-bottom: clamp(28px, 5vw, 56px);
}
.page-contact .section-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
  margin: 0 0 12px;
}
.page-contact .section-head h2 {
  margin: 0 0 16px;
  color: var(--white);
}
.page-contact .section-head .lede {
  margin: 0;
  color: var(--stone);
}

/* ---------- 来意切换 ---------- */
.page-contact .intent-switch {
  position: relative;
}
.page-contact .intent-chips {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 32px;
}
.page-contact .intent-chip {
  display: block;
  cursor: pointer;
  padding: 20px 22px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), 14px 100%, 0 100%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-contact .chip-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--stone);
  margin-bottom: 10px;
}
.page-contact .chip-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--white);
  margin-bottom: 6px;
}
.page-contact .chip-hint {
  display: block;
  font-size: 13px;
  color: var(--stone);
  line-height: 1.5;
}
.page-contact .intent-chip:hover {
  transform: translateY(-4px) rotate(-0.4deg);
  border-color: var(--line-lime);
}

/* 选中态：翻转为暖橙 */
.page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"],
.page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"],
.page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"],
.page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] {
  background: var(--orange);
  border-color: var(--orange);
  transform: translateY(-4px) rotate(-0.6deg);
}
.page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"] .chip-num,
.page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"] .chip-num,
.page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"] .chip-num,
.page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] .chip-num,
.page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"] .chip-label,
.page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"] .chip-label,
.page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"] .chip-label,
.page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] .chip-label,
.page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"] .chip-hint,
.page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"] .chip-hint,
.page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"] .chip-hint,
.page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] .chip-hint {
  color: var(--ink);
}

/* 键盘焦点 */
.page-contact .intent-switch:has(#intent-a:focus-visible) label[for="intent-a"],
.page-contact .intent-switch:has(#intent-b:focus-visible) label[for="intent-b"],
.page-contact .intent-switch:has(#intent-c:focus-visible) label[for="intent-c"],
.page-contact .intent-switch:has(#intent-d:focus-visible) label[for="intent-d"] {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* 面板 */
.page-contact .intent-panel {
  display: none;
  padding: 26px 24px 28px;
  background: var(--ink-2);
  border-left: 3px solid var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 20px 100%, 0 100%);
}
.page-contact #intent-a:checked ~ .intent-panels #panel-a,
.page-contact #intent-b:checked ~ .intent-panels #panel-b,
.page-contact #intent-c:checked ~ .intent-panels #panel-c,
.page-contact #intent-d:checked ~ .intent-panels #panel-d {
  display: block;
  animation: contact-panel-in 220ms var(--ease) both;
}
@keyframes contact-panel-in {
  from { opacity: 0; transform: translate(12px, 12px); }
  to { opacity: 1; transform: translate(0, 0); }
}

.page-contact .panel-title {
  margin: 0 0 16px;
  color: var(--white);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}
.page-contact .panel-team {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  font-weight: 400;
}
.page-contact .intent-panel > p {
  margin: 0 0 18px;
  color: var(--stone);
  max-width: 68ch;
}
.page-contact .intent-panel a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-lime);
}
.page-contact .intent-panel a:hover,
.page-contact .intent-panel a:focus-visible {
  border-color: var(--lime);
}
.page-contact .panel-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.page-contact .panel-list li {
  position: relative;
  padding-left: 20px;
  color: var(--white);
  font-size: 15px;
  line-height: 1.65;
}
.page-contact .panel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 1px;
  background: var(--lime);
}
.page-contact .panel-list .mono {
  color: var(--amber);
}

/* ---------- 提交前准备 ---------- */
.page-contact .prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-contact .prep-copy h2 {
  margin: 0 0 16px;
  color: var(--white);
}
.page-contact .prep-copy .lede {
  margin: 0 0 28px;
  color: var(--stone);
}
.page-contact .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-contact .prep-list li {
  padding: 16px 0 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--stone);
  font-size: 15px;
  line-height: 1.7;
}
.page-contact .prep-list li strong {
  display: inline-block;
  min-width: 88px;
  color: var(--white);
  font-weight: 700;
}

.page-contact .prep-self {
  padding: 26px 24px 30px;
  color: var(--ink);
}
.page-contact .prep-self h3 {
  margin: 0 0 14px;
  color: var(--ink);
}
.page-contact .prep-self > p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-3);
}
.page-contact .prep-self a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
}
.page-contact .prep-self a:hover,
.page-contact .prep-self a:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}
.page-contact .self-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--paper-2);
}
.page-contact .self-num {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--ink-3);
  background: var(--paper-2);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}
.page-contact .self-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-3);
}
.page-contact .prep-self .btn-primary {
  margin-top: 24px;
  color: var(--white);
}
.page-contact .prep-self .btn-primary:hover,
.page-contact .prep-self .btn-primary:focus-visible {
  color: var(--ink);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-contact .coop-list {
  display: grid;
  gap: 18px;
}
.page-contact .coop-card {
  padding: 24px 22px 26px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 16px 100%, 0 100%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .coop-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  border-color: var(--line-lime);
}
.page-contact .coop-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--lime);
  padding: 5px 12px;
  margin-bottom: 16px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.page-contact .coop-card h3 {
  margin: 0 0 12px;
  color: var(--white);
}
.page-contact .coop-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}
.page-contact .coop-fit {
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--lime) !important;
  font-size: 13px !important;
}
.page-contact .coop-media {
  align-self: start;
}
.page-contact .coop-more {
  margin: 28px 0 0;
  font-size: 15px;
  color: var(--stone);
}
.page-contact .coop-more a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-lime);
}
.page-contact .coop-more a:hover,
.page-contact .coop-more a:focus-visible {
  border-color: var(--lime);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channel-section {
  position: relative;
  padding-top: calc(var(--contact-gap) + 12px);
  padding-bottom: calc(var(--contact-gap) + 12px);
  background: linear-gradient(180deg, transparent 0%, rgba(20, 53, 42, 0.72) 18%, rgba(20, 53, 42, 0.72) 82%, transparent 100%);
}
.page-contact .channel-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-contact .channel-list {
  display: grid;
  gap: 0;
}
.page-contact .channel-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .channel-key {
  grid-column: 1 / -1;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}
.page-contact .channel-val {
  font-size: 15px;
  color: var(--white);
  word-break: break-word;
  line-height: 1.5;
  letter-spacing: 0.02em;
}
.page-contact .channel-note {
  margin-top: 26px;
  padding: 20px 20px 22px;
  background: var(--slate);
  border-left: 3px solid var(--lime);
}
.page-contact .channel-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}
.page-contact .channel-note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-lime);
}
.page-contact .channel-note a:hover,
.page-contact .channel-note a:focus-visible {
  border-color: var(--lime);
}
.page-contact .channel-note .mono {
  color: var(--amber);
}

/* 复制按钮 */
.page-contact .copy-btn {
  flex: 0 0 auto;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime);
  background: transparent;
  border: 1px solid var(--line-lime);
  padding: 7px 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}
.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--lime);
  color: var(--ink);
  border-color: var(--lime);
}
.page-contact .copy-btn[data-copied] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

/* ---------- 处理进度 ---------- */
.page-contact .track {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 26px;
  position: relative;
}
.page-contact .track-step {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), 16px 100%, 0 100%);
}
.page-contact .track-num {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink);
  background: var(--lime);
  padding: 4px 10px;
  margin-bottom: 16px;
}
.page-contact .track-step h3 {
  margin: 0 0 12px;
  color: var(--white);
}
.page-contact .track-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}
.page-contact .track-foot {
  margin: 30px 0 0;
  padding: 20px 20px 22px;
  background: var(--ink-2);
  border-left: 3px solid var(--orange);
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}
.page-contact .track-foot .mono {
  color: var(--amber);
  font-size: 1.05em;
}

/* ---------- 图片容器微调 ---------- */
.page-contact .media-frame img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}
.page-contact .coop-media img {
  aspect-ratio: 14 / 9;
}
.page-contact .channel-media img {
  aspect-ratio: 4 / 3;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-contact .intent-chips {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .page-contact .intent-chip:nth-child(2) { transform: translateY(18px); }
  .page-contact .intent-chip:nth-child(4) { transform: translateY(18px); }
  .page-contact .intent-chip:nth-child(2):hover { transform: translateY(14px) rotate(-0.4deg); }
  .page-contact .intent-chip:nth-child(4):hover { transform: translateY(14px) rotate(-0.4deg); }

  .page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"],
  .page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"],
  .page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"],
  .page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] {
    transform: translateY(0) rotate(-0.6deg);
  }
  .page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"],
  .page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] {
    transform: translateY(18px) rotate(-0.6deg);
  }

  .page-contact .prep-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: start;
  }
  .page-contact .coop-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .page-contact .coop-list .coop-card:nth-child(2) { transform: translateY(22px); }
  .page-contact .coop-list .coop-card:nth-child(4) { transform: translateY(22px); }
  .page-contact .coop-list .coop-card:nth-child(2):hover { transform: translateY(16px) rotate(-0.5deg); }
  .page-contact .coop-list .coop-card:nth-child(4):hover { transform: translateY(16px) rotate(-0.5deg); }

  .page-contact .track {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .page-contact .track::before {
    content: "";
    position: absolute;
    top: 33px;
    left: 8px;
    right: 8px;
    height: 1px;
    background: var(--line-lime);
    z-index: 0;
  }
  .page-contact .track-step {
    z-index: 1;
  }
  .page-contact .track-step:nth-child(2) { transform: translateY(20px); }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-contact .contact-hero h1 {
    max-width: 18ch;
  }
  .page-contact .intent-chips {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .page-contact .intent-chip:nth-child(1) { transform: translateY(0); }
  .page-contact .intent-chip:nth-child(2) { transform: translateY(22px); }
  .page-contact .intent-chip:nth-child(3) { transform: translateY(0); }
  .page-contact .intent-chip:nth-child(4) { transform: translateY(22px); }
  .page-contact .intent-chip:nth-child(1):hover { transform: translateY(-5px) rotate(-0.4deg); }
  .page-contact .intent-chip:nth-child(2):hover { transform: translateY(17px) rotate(-0.4deg); }
  .page-contact .intent-chip:nth-child(3):hover { transform: translateY(-5px) rotate(-0.4deg); }
  .page-contact .intent-chip:nth-child(4):hover { transform: translateY(17px) rotate(-0.4deg); }

  .page-contact #intent-a:checked ~ .intent-chips label[for="intent-a"],
  .page-contact #intent-c:checked ~ .intent-chips label[for="intent-c"] {
    transform: translateY(0) rotate(-0.6deg);
  }
  .page-contact #intent-b:checked ~ .intent-chips label[for="intent-b"],
  .page-contact #intent-d:checked ~ .intent-chips label[for="intent-d"] {
    transform: translateY(22px) rotate(-0.6deg);
  }

  .page-contact .intent-panel {
    padding: 34px 36px 38px;
  }
  .page-contact .channel-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }
  .page-contact .channel-row {
    grid-template-columns: 120px 1fr auto;
    gap: 20px;
    padding: 22px 0;
  }
  .page-contact .channel-key {
    grid-column: auto;
  }
  .page-contact .channel-val {
    font-size: 17px;
  }
  .page-contact .coop-layout {
    grid-template-columns: 1.35fr 0.65fr;
    gap: 44px;
    align-items: start;
  }
  .page-contact .track {
    gap: 30px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .intent-panel {
    animation: none !important;
  }
  .page-contact .intent-chip,
  .page-contact .coop-card {
    transition: none !important;
  }
}
<<<END>>>