.page-contact {
  --c-chan-mail: #FFC300;
  --c-chan-tel: #00D4FF;
  --c-chan-adr: #39FF14;
  --c-box-shadow: rgba(0, 0, 0, 0.3);
  --c-mesh-line: rgba(255, 255, 255, 0.06);
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--c-page);
  background-image:
    linear-gradient(var(--c-mesh-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-mesh-line) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--c-text);
  font-family: var(--font-body);
}

/* ========== 顶部横幅 ========== */
.contact-hero {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px 16px 8px;
  position: relative;
}
.contact-hero__content {
  position: relative;
  z-index: 1;
}
.contact-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 14px;
  font-size: 12px;
}
.contact-hero .breadcrumbs a {
  color: var(--c-primary);
  text-decoration: none;
}
.contact-hero .breadcrumbs__sep {
  color: var(--c-border);
  opacity: 0.7;
}
.contact-hero .breadcrumbs__current {
  color: var(--c-accent);
  font-weight: 700;
}
.contact-hero__title {
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 10px;
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}
.contact-hero__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 52px;
  height: 4px;
  background: var(--c-accent);
  box-shadow: 4px 4px 0 var(--c-primary);
}
.contact-hero__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  max-width: 560px;
  margin: 14px 0 0;
}
.contact-hero__img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border: 2px solid var(--c-border);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.28);
  margin: 0;
}

/* ========== 反馈渠道 ========== */
.contact-channels {
  padding: 36px 16px 28px;
  position: relative;
}
.contact-channels__head {
  margin-bottom: 18px;
}
.contact-channels__heading {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 6px;
  letter-spacing: 0.03em;
  display: inline-block;
  position: relative;
}
.contact-channels__heading::before {
  content: "◆";
  color: var(--c-tag-hot);
  margin-right: 8px;
  font-size: 14px;
}
.contact-channels__subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}
.contact-channels__bg {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border: 2px solid var(--c-border);
  margin: 0 0 22px;
  background: rgba(36, 30, 46, 0.5);
}
.contact-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.channel-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 18px 16px 16px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 0;
  text-decoration: none;
  position: relative;
  box-shadow: 5px 5px 0 var(--c-box-shadow);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
  min-height: 150px;
}
a.channel-card {
  cursor: pointer;
}
.channel-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.22);
  border-color: var(--c-primary);
}
.channel-card__icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-page);
  background: var(--c-chan-mail);
  border: 2px solid var(--c-text);
  box-shadow: 3px 3px 0 var(--c-text);
  margin-bottom: 8px;
}
.channel-card--phone .channel-card__icon {
  background: var(--c-chan-tel);
}
.channel-card--address .channel-card__icon {
  background: var(--c-chan-adr);
}
.channel-card__label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}
.channel-card__value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.45;
  color: var(--c-text);
  word-break: break-all;
}
.channel-card__hint {
  font-size: 12px;
  color: var(--c-muted);
  margin-top: 2px;
  line-height: 1.4;
}
.channel-card__action {
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--c-accent);
  letter-spacing: 0.04em;
}
a.channel-card:hover .channel-card__action {
  color: var(--c-primary);
}
.contact-channels__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 22px;
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  border-left: 5px solid var(--c-accent);
  background: rgba(36, 30, 46, 0.55);
}
.contact-channels__status {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  white-space: nowrap;
}
.contact-channels__status::before {
  content: "●";
  margin-right: 7px;
  font-size: 10px;
  vertical-align: middle;
}
.contact-channels__note {
  font-size: 12px;
  color: var(--c-muted);
}

/* ========== 常见反馈类型 ========== */
.contact-types {
  padding: 34px 16px;
  background-color: var(--c-section-a);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  border-top: 3px solid var(--c-accent);
  border-bottom: 3px solid var(--c-accent);
}
.contact-types__head {
  margin-bottom: 20px;
}
.contact-types__heading {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 6px;
  letter-spacing: 0.03em;
}
.contact-types__heading::before {
  content: "◆";
  color: var(--c-tag-mid);
  margin-right: 8px;
  font-size: 14px;
}
.contact-types__subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}
.contact-types__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.type-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 12px;
  background: rgba(36, 30, 46, 0.9);
  border: 1px solid var(--c-border);
  border-radius: 0;
  position: relative;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.type-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-2px);
}
.type-card__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-page);
  background: var(--c-tag-hot);
  border: 2px solid var(--c-text);
  box-shadow: 3px 3px 0 var(--c-text);
  margin-bottom: 4px;
}
.type-card__icon--screen {
  background: var(--c-tag-mid);
}
.type-card__icon--tag {
  background: var(--c-tag-cool);
}
.type-card__icon--sync {
  background: var(--c-tag-live);
}
.type-card__icon--search {
  background: var(--c-new);
}
.type-card__icon--fix {
  background: var(--c-done);
}
.type-card__icon--batch {
  background: var(--c-border);
}
.type-card__icon--chat {
  background: var(--c-update);
}
.type-card__title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0;
  line-height: 1.3;
}
.type-card__desc {
  font-size: 12px;
  line-height: 1.55;
  color: var(--c-muted);
  margin: 0;
  flex: 1;
}
.type-card__tag {
  align-self: flex-start;
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--c-border);
  padding: 2px 8px;
  letter-spacing: 0.05em;
  margin-top: auto;
}

/* ========== 处理流程 ========== */
.contact-flow {
  padding: 34px 16px;
  background-color: var(--c-section-b);
  position: relative;
}
.contact-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}
.contact-flow__head,
.contact-flow__timeline,
.contact-flow__banner {
  position: relative;
  z-index: 1;
}
.contact-flow__head {
  margin-bottom: 16px;
}
.contact-flow__heading {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 6px;
  letter-spacing: 0.03em;
}
.contact-flow__heading::before {
  content: "◆";
  color: var(--c-tag-live);
  margin-right: 8px;
  font-size: 14px;
}
.contact-flow__subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}
.contact-flow__banner {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 2px solid var(--c-tag-live);
  margin: 0 0 22px;
  background: rgba(0, 0, 0, 0.32);
}
.contact-flow__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: flex;
  flex-direction: column;
}
.contact-flow__timeline::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--c-tag-live);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.7);
}
.flow-step {
  position: relative;
  display: flex;
  gap: 18px;
  padding: 0 0 22px;
}
.flow-step:last-child {
  padding-bottom: 0;
}
.flow-step__num {
  flex: 0 0 46px;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-page);
  background: var(--c-tag-live);
  border: 2px solid var(--c-text);
  box-shadow: 0 0 0 4px var(--c-section-b), 0 0 0 5px var(--c-tag-live);
  position: relative;
  z-index: 2;
}
.flow-step__body {
  padding-top: 6px;
}
.flow-step__title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 4px;
}
.flow-step__desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--c-muted);
  margin: 0;
  max-width: 440px;
}

/* ========== 其他入口 ========== */
.contact-links {
  padding: 36px 16px 44px;
}
.contact-links__head {
  margin-bottom: 20px;
}
.contact-links__heading {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 6px;
  letter-spacing: 0.03em;
}
.contact-links__heading::before {
  content: "◆";
  color: var(--c-primary);
  margin-right: 8px;
  font-size: 14px;
}
.contact-links__subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin: 0;
}
.contact-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.link-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 14px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 0;
  text-decoration: none;
  box-shadow: 5px 5px 0 var(--c-box-shadow);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.link-card:hover {
  border-color: var(--c-primary);
  transform: translateX(3px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.2);
}
.link-card__index {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
  background: rgba(0, 212, 255, 0.07);
}
.link-card__body {
  flex: 1;
  min-width: 0;
}
.link-card__title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 3px;
}
.link-card__desc {
  font-size: 12px;
  line-height: 1.55;
  color: var(--c-muted);
  margin: 0;
}
.link-card__arrow {
  flex: 0 0 auto;
  font-size: 20px;
  color: var(--c-accent);
  font-weight: 700;
}

/* ========== 平板与桌面 ========== */
@media (min-width: 480px) {
  .contact-types__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .contact-channels__grid {
    gap: 18px;
  }
}

@media (min-width: 768px) {
  .page-contact {
    background-size: 40px 40px;
  }
  .contact-hero {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding: 40px 28px 18px;
  }
  .contact-hero__content {
    flex: 1;
  }
  .contact-hero__img {
    flex: 0 0 460px;
    width: 460px;
    max-width: 460px;
    margin: 0;
  }
  .contact-hero__title {
    font-size: 36px;
  }
  .contact-hero__desc {
    font-size: 15px;
  }
  .contact-channels {
    padding: 48px 28px 36px;
  }
  .contact-channels__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .channel-card {
    min-height: 158px;
  }
  .channel-card--phone {
    margin-top: 18px;
  }
  .contact-types {
    padding: 46px 28px;
  }
  .contact-types__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }
  .type-card:nth-child(even) {
    transform: translateY(12px);
  }
  .type-card:nth-child(even):hover {
    transform: translateY(10px);
  }
  .contact-flow {
    padding: 46px 28px;
  }
  .contact-flow__banner {
    margin-left: auto;
    margin-right: auto;
  }
  .contact-flow__timeline {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }
  .contact-links {
    padding: 46px 28px 56px;
  }
  .contact-links__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .link-card:nth-child(2) {
    margin-top: 18px;
  }
  .contact-links__subtitle {
    margin-bottom: 4px;
  }
}

@media (min-width: 1200px) {
  .contact-hero,
  .contact-channels,
  .contact-types,
  .contact-flow,
  .contact-links {
    padding-left: 48px;
    padding-right: 48px;
  }
  .contact-hero {
    padding-top: 52px;
  }
  .contact-hero__img {
    flex-basis: 520px;
    width: 520px;
    max-width: 520px;
  }
  .contact-hero__desc {
    max-width: 620px;
  }
}