.page-contact {
  --contact-line: rgba(184, 192, 208, 0.28);
  --contact-paper-line: rgba(184, 192, 208, 0.1);
  --contact-input-bg: rgba(6, 13, 33, 0.55);
  padding: var(--space-5) 0 var(--space-9);
  overflow-x: hidden;
}

.page-contact img {
  max-width: 100%;
  height: auto;
}

/* ===== 标题区 ===== */
.page-contact .contact-hero__stream {
  height: 3px;
  margin-top: var(--space-6);
  background: linear-gradient(90deg, var(--color-green) 0%, var(--color-green) 34%, var(--color-orange) 34%, var(--color-orange) 64%, transparent 64%);
  opacity: 0.5;
}

.page-contact .contact-hero__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding-top: var(--space-6);
}

.page-contact .contact-hero__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--color-green);
  padding: var(--space-1) var(--space-2);
  border: 1px solid rgba(57, 255, 20, 0.4);
  background: var(--color-green-dim);
}

.page-contact .contact-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4rem);
  line-height: 1.06;
  margin: var(--space-4) 0 var(--space-3);
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.page-contact .contact-hero__sub {
  display: block;
  font-size: 0.5em;
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--color-orange);
  letter-spacing: 0.08em;
  margin-top: var(--space-2);
}

.page-contact .contact-hero__sep {
  color: var(--color-green);
  font-weight: 400;
}

.page-contact .contact-hero__desc {
  color: var(--color-text-dim);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 34em;
}

.page-contact .contact-hero__aside {
  background: var(--color-card);
  border-left: 4px solid var(--color-green);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.2);
}

.page-contact .contact-hero__aside-label {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-contact .contact-hero__aside-value {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-green);
  line-height: 1;
}

.page-contact .contact-hero__aside-note {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* ===== 信纸联系区 ===== */
.page-contact .contact-paper {
  margin-top: var(--space-8);
}

.page-contact .contact-paper__board {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: start;
}

.page-contact .contact-paper__left {
  position: relative;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.22);
  padding: var(--space-6) var(--space-5);
}

.page-contact .contact-paper__left::before {
  content: "ADDRESS";
  position: absolute;
  top: 18px;
  right: -28px;
  transform: rotate(38deg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--color-orange);
  border: 1px solid var(--color-orange);
  padding: 2px 32px;
  background: rgba(255, 107, 0, 0.1);
}

.page-contact .paper-heading {
  margin-bottom: var(--space-4);
}

.page-contact .paper-heading h2,
.page-contact .promise-box h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  margin: var(--space-3) 0 0;
  color: var(--color-white);
}

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

.page-contact .contact-list__item {
  padding: var(--space-4) 0;
  border-bottom: 1px dashed var(--contact-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-contact .contact-list__label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
  text-transform: uppercase;
}

.page-contact .contact-list__value {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-white);
  word-break: break-word;
}

.page-contact .contact-list__note {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

.page-contact .contact-paper__img {
  margin-top: var(--space-5);
  border: 1px solid var(--color-border);
  display: block;
  width: 100%;
  height: auto;
  background: var(--color-bg-deep);
}

/* ===== 响应承诺 ===== */
.page-contact .contact-paper__right {
  position: relative;
}

.page-contact .promise-box {
  background: var(--color-card-solid);
  border: 1px solid var(--color-border);
  border-top: 5px solid var(--color-orange);
  padding: var(--space-6) var(--space-5);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.22);
}

.page-contact .promise-clock {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--color-green-dim);
  border: 1px solid rgba(57, 255, 20, 0.35);
  padding: var(--space-4);
  margin: var(--space-4) 0 var(--space-5);
}

.page-contact .promise-clock__num {
  font-family: var(--font-mono);
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--color-green);
  line-height: 1;
}

.page-contact .promise-clock__unit {
  font-size: 0.95rem;
  color: var(--color-white);
  line-height: 1.4;
}

.page-contact .promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .promise-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text-dim);
}

.page-contact .promise-list li b {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-green);
  background: var(--color-green-dim);
  padding: 2px var(--space-2);
  white-space: nowrap;
}

.page-contact .promise-box__foot {
  margin-top: var(--space-4);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.6;
}

/* ===== 反馈表单 ===== */
.page-contact .contact-feedback {
  margin-top: var(--space-8);
}

.page-contact .contact-feedback__card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 6px solid var(--color-orange);
  padding: var(--space-6) var(--space-5);
}

.page-contact .contact-feedback__head {
  margin-bottom: var(--space-5);
}

.page-contact .contact-feedback__index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-orange);
  letter-spacing: 0.2em;
}

.page-contact .contact-feedback__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  margin: var(--space-2) 0;
  color: var(--color-white);
}

.page-contact .contact-feedback__head p {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

.page-contact .contact-feedback__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-contact .contact-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

.page-contact .contact-field label {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-text-dim);
  letter-spacing: 0.06em;
}

.page-contact .contact-field input,
.page-contact .contact-field select,
.page-contact .contact-field textarea {
  width: 100%;
  box-sizing: border-box;
  background: var(--contact-input-bg);
  border: 1px solid var(--color-border);
  color: var(--color-white);
  padding: var(--space-3) var(--space-4);
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-contact .contact-field textarea {
  resize: vertical;
  min-height: 110px;
}

.page-contact .contact-field input:hover,
.page-contact .contact-field select:hover,
.page-contact .contact-field textarea:hover {
  border-color: var(--color-border-light);
}

.page-contact .contact-field input:focus,
.page-contact .contact-field select:focus,
.page-contact .contact-field textarea:focus {
  outline: none;
  border-color: var(--color-green);
  box-shadow: 0 0 0 3px var(--color-green-dim);
}

.page-contact .contact-field input::placeholder,
.page-contact .contact-field textarea::placeholder {
  color: rgba(184, 192, 208, 0.5);
}

.page-contact .contact-feedback__actions {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px dashed var(--contact-line);
}

.page-contact .contact-feedback__send-label {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  margin-right: var(--space-2);
}

.page-contact .contact-feedback__send-value {
  font-family: var(--font-mono);
  color: var(--color-green);
  font-size: 1.05rem;
  word-break: break-word;
}

.page-contact .contact-feedback__hint {
  margin-top: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  line-height: 1.5;
}

/* ===== 常见联系场景 ===== */
.page-contact .contact-scenario {
  margin-top: var(--space-8);
}

.page-contact .contact-scenario__head {
  margin-bottom: var(--space-5);
}

.page-contact .contact-scenario__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.7rem;
  margin: var(--space-2) 0;
  color: var(--color-white);
}

.page-contact .contact-scenario__head p {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  margin: 0;
}

.page-contact .contact-scenario__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-contact .contact-scenario__item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.page-contact .contact-scenario__item:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.page-contact .contact-scenario__item summary {
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  list-style: none;
}

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

.page-contact .contact-scenario__item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-orange);
  margin-left: auto;
  transition: transform var(--transition-fast);
}

.page-contact .contact-scenario__item[open] summary::after {
  content: "−";
  transform: scale(1.15);
}

.page-contact .contact-scenario__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-orange);
}

.page-contact .contact-scenario__name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-white);
}

.page-contact .contact-scenario__scope {
  font-size: 0.82rem;
  color: var(--color-text-dim);
  font-family: var(--font-mono);
  flex-shrink: 1;
  min-width: 0;
}

.page-contact .contact-scenario__item[open] {
  border-color: var(--color-green);
}

.page-contact .contact-scenario__details {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-dim);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-contact .contact-scenario__details p {
  margin: 0;
}

.page-contact .contact-scenario__details a {
  color: var(--color-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-scenario__details a:hover {
  color: var(--color-white);
}

.page-contact .contact-scenario__paper {
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  padding: var(--space-3);
  display: flex;
  justify-content: center;
}

.page-contact .contact-scenario__paper img {
  width: 100%;
  max-width: 460px;
  height: auto;
  opacity: 0.75;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-contact .contact-feedback__grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 1024px) {
  .page-contact {
    padding: var(--space-7) 0 var(--space-9);
  }

  .page-contact .contact-hero__grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    align-items: end;
    gap: var(--space-7);
    padding-top: var(--space-7);
  }

  .page-contact .contact-paper__board {
    grid-template-columns: 3fr 2fr;
    gap: var(--space-6);
  }

  .page-contact .contact-paper__left,
  .page-contact .promise-box {
    padding: var(--space-7);
  }

  .page-contact .contact-scenario__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .contact-scenario__paper img {
    max-width: 720px;
  }
}