.page-contact {
  --pc-line: 1px solid var(--line-500);
  --pc-pad: clamp(18px, 3vw, 30px);
  background: var(--ink-900);
  color: var(--cream-100);
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 2.6vw, 26px) 0 clamp(30px, 5vw, 58px);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  right: -16%;
  top: -18%;
  width: 82%;
  height: 132%;
  background: linear-gradient(155deg, rgba(200, 255, 61, 0.16), rgba(255, 138, 61, 0.12) 52%, rgba(4, 18, 14, 0) 76%);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-contact .pc-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-contact h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 58px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--cream-100);
}

.page-contact .pc-hero .lede {
  margin-top: 16px;
  color: var(--sage-300);
  font-size: 16px;
  line-height: 1.75;
  max-width: 34em;
}

.page-contact .pc-quick {
  display: grid;
  gap: 1px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  background: var(--line-500);
  border: var(--pc-line);
}

.page-contact .pc-quick > div {
  background: var(--ink-950);
  padding: 12px 14px;
}

.page-contact .pc-quick dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim-400);
}

.page-contact .pc-quick dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.4;
  color: var(--cream-100);
  word-break: break-word;
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-contact .pc-hero__figure {
  margin: 0;
  aspect-ratio: 4 / 3;
}

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

/* ---------- 区块骨架 ---------- */
.page-contact .pc-section {
  padding: clamp(36px, 6vw, 72px) 0;
  border-top: var(--pc-line);
}

.page-contact .pc-head {
  margin-bottom: clamp(20px, 3vw, 34px);
  max-width: 46em;
}

.page-contact .pc-head .section-title {
  margin: 10px 0 0;
}

.page-contact .pc-head .lede {
  margin-top: 12px;
  color: var(--sage-300);
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .pc-link {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-contact .pc-link:hover {
  color: var(--lime-300);
  border-bottom-color: var(--lime-300);
}

.page-contact .pc-link:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: 3px;
}

/* ---------- 反馈类型切换 ---------- */
.page-contact .fb-switch {
  display: grid;
  gap: var(--gap);
}

.page-contact .fb-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .fb-timeline {
  position: relative;
  display: grid;
  border-left: var(--pc-line);
  margin-left: 6px;
}

.page-contact .fb-step {
  position: relative;
  display: grid;
  gap: 3px;
  padding: 13px 14px 13px 20px;
  cursor: pointer;
  transition: background var(--t-mid), color var(--t-fast);
}

.page-contact .fb-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 22px;
  width: 9px;
  height: 9px;
  background: var(--node, var(--ink-800));
  border: 1px solid var(--line-500);
  transition: background var(--t-mid);
}

.page-contact .fb-step__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--dim-400);
}

.page-contact .fb-step__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cream-100);
}

.page-contact .fb-step__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage-300);
}

.page-contact .fb-step:hover {
  background: rgba(11, 42, 34, 0.7);
}

.page-contact .fb-radio:nth-of-type(1):checked ~ .fb-timeline .fb-step:nth-child(1),
.page-contact .fb-radio:nth-of-type(2):checked ~ .fb-timeline .fb-step:nth-child(2),
.page-contact .fb-radio:nth-of-type(3):checked ~ .fb-timeline .fb-step:nth-child(3),
.page-contact .fb-radio:nth-of-type(4):checked ~ .fb-timeline .fb-step:nth-child(4) {
  --node: var(--lime-400);
  background: linear-gradient(90deg, rgba(200, 255, 61, 0.14), rgba(200, 255, 61, 0));
}

.page-contact .fb-radio:focus-visible ~ .fb-timeline {
  outline: 2px solid var(--lime-400);
  outline-offset: 4px;
}

.page-contact .fb-panels {
  min-width: 0;
}

.page-contact .fb-panel {
  display: none;
  padding: var(--pc-pad);
  background: var(--ink-800);
  border: var(--pc-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-contact .fb-radio:nth-of-type(1):checked ~ .fb-panels > .fb-panel:nth-child(1),
.page-contact .fb-radio:nth-of-type(2):checked ~ .fb-panels > .fb-panel:nth-child(2),
.page-contact .fb-radio:nth-of-type(3):checked ~ .fb-panels > .fb-panel:nth-child(3),
.page-contact .fb-radio:nth-of-type(4):checked ~ .fb-panels > .fb-panel:nth-child(4) {
  display: block;
}

.page-contact .fb-panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 24px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--cream-100);
}

.page-contact .fb-panel p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sage-300);
  max-width: 40em;
}

.page-contact .fb-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .fb-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage-300);
}

.page-contact .fb-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--orange-500);
}

.page-contact .fb-panel__more {
  margin-top: 18px;
  padding-top: 14px;
  border-top: var(--pc-line);
  font-size: 14px;
}

/* ---------- 反馈内容准备 ---------- */
.page-contact .pc-form {
  display: grid;
  gap: var(--gap);
}

.page-contact .pc-form__aside {
  padding: var(--pc-pad);
  background: var(--ink-800);
  border: var(--pc-line);
  border-top: 3px solid var(--orange-500);
}

.page-contact .pc-form__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 800;
  line-height: 1.18;
  color: var(--cream-100);
}

.page-contact .pc-prep {
  list-style: none;
  counter-reset: prep;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .pc-prep li {
  counter-increment: prep;
  position: relative;
  padding-left: 32px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage-300);
}

.page-contact .pc-prep li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime-400);
}

.page-contact .pc-prep li strong {
  display: block;
  color: var(--cream-100);
  font-weight: 600;
}

.page-contact .pc-prep__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: var(--pc-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim-400);
}

.page-contact .pc-form__main {
  min-width: 0;
  padding: var(--pc-pad);
  background: var(--ink-950);
  border: var(--pc-line);
}

.page-contact .pc-form__lead {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage-300);
}

.page-contact .pc-fields {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-contact .pc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-contact .pc-field__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--dim-400);
}

.page-contact .pc-field input,
.page-contact .pc-field select,
.page-contact .pc-field textarea {
  width: 100%;
  padding: 11px 12px;
  background: var(--ink-800);
  color: var(--cream-100);
  border: 1px solid var(--line-500);
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  appearance: none;
  -webkit-appearance: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}

.page-contact .pc-field textarea {
  min-height: 140px;
  resize: vertical;
}

.page-contact .pc-field input::placeholder,
.page-contact .pc-field textarea::placeholder {
  color: var(--dim-400);
}

.page-contact .pc-field input:focus,
.page-contact .pc-field select:focus,
.page-contact .pc-field textarea:focus {
  outline: none;
  border-color: var(--lime-400);
  box-shadow: inset 0 0 0 1px var(--lime-400);
}

.page-contact .pc-field input[type="email"]:not(:placeholder-shown):invalid {
  border-color: var(--orange-500);
}

.page-contact .pc-hint {
  display: none;
  font-size: 13px;
  line-height: 1.5;
  color: var(--orange-300);
}

.page-contact .pc-field input[type="email"]:not(:placeholder-shown):invalid + .pc-hint {
  display: block;
}

.page-contact .pc-form__send {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: var(--pc-line);
  font-size: 13px;
  line-height: 1.8;
  color: var(--sage-300);
}

.page-contact .pc-form__send strong {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--cream-100);
  word-break: break-all;
}

/* ---------- 联系方式 ---------- */
.page-contact .pc-cards {
  display: grid;
  gap: 1px;
  background: var(--line-500);
  border: var(--pc-line);
}

.page-contact .pc-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--pc-pad);
  background: var(--ink-950);
}

.page-contact .pc-card .eyebrow {
  margin: 0;
}

.page-contact .pc-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.4vw, 20px);
  line-height: 1.35;
  color: var(--lime-400);
  word-break: break-all;
}

.page-contact .pc-card__value--text {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--cream-100);
  word-break: normal;
}

.page-contact .pc-card__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--sage-300);
}

.page-contact .pc-contact__media {
  margin: var(--gap) 0 0;
  aspect-ratio: 1000 / 420;
}

.page-contact .pc-contact__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 处理流程 ---------- */
.page-contact .pc-steps {
  display: grid;
  gap: 1px;
  background: var(--line-500);
  border: var(--pc-line);
}

.page-contact .pc-step {
  padding: clamp(18px, 2.6vw, 24px);
  background: var(--ink-800);
}

.page-contact .pc-step__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime-400);
}

.page-contact .pc-step__title {
  margin: 10px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--cream-100);
}

.page-contact .pc-step p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--sage-300);
}

.page-contact .pc-flow__note {
  margin: 16px 0 0;
  padding: 14px 16px;
  background: var(--ink-800);
  border-left: 2px solid var(--orange-500);
  font-size: 13px;
  line-height: 1.78;
  color: var(--sage-300);
}

/* ---------- 纠错与合作 ---------- */
.page-contact .pc-duo {
  display: grid;
  gap: var(--gap);
}

.page-contact .pc-duo__card {
  padding: var(--pc-pad);
  background: var(--ink-800);
  border: var(--pc-line);
}

.page-contact .pc-duo__card--a {
  border-top: 3px solid var(--lime-400);
}

.page-contact .pc-duo__card--b {
  border-top: 3px solid var(--orange-500);
}

.page-contact .pc-duo__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 24px);
  font-weight: 800;
  line-height: 1.24;
  color: var(--cream-100);
}

.page-contact .pc-duo__card p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--sage-300);
}

.page-contact .pc-duo__more {
  padding-top: 14px;
  border-top: var(--pc-line);
}

/* ---------- 底部引导条 ---------- */
.page-contact .pc-band {
  padding: clamp(32px, 5vw, 58px) 0;
  border-top: var(--pc-line);
  background:
    linear-gradient(118deg, rgba(200, 255, 61, 0.12), rgba(255, 138, 61, 0.08) 46%, rgba(4, 18, 14, 0) 72%),
    var(--ink-950);
}

.page-contact .pc-band__inner {
  display: grid;
  gap: 22px;
}

.page-contact .pc-band__title {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 36px);
  font-weight: 800;
  line-height: 1.12;
  color: var(--cream-100);
}

.page-contact .pc-band p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sage-300);
}

.page-contact .pc-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .pc-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .pc-field--full {
    grid-column: 1 / -1;
  }

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

@media (min-width: 860px) {
  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-contact .pc-hero__figure {
    aspect-ratio: 3 / 2;
  }

  .page-contact .fb-switch {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .pc-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-duo {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .pc-duo__card--b {
    margin-top: 36px;
  }

  .page-contact .pc-band__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-contact .pc-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .pc-form {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .pc-form__aside {
    position: sticky;
    top: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-step,
  .page-contact .fb-step::before,
  .page-contact .pc-field input,
  .page-contact .pc-field select,
  .page-contact .pc-field textarea,
  .page-contact .pc-link {
    transition: none;
  }
}
<<<END>>>