.page-contact {
  --pc-panel: linear-gradient(160deg, rgba(27, 20, 16, .92), rgba(17, 21, 20, .96));
  --pc-glow-line: rgba(51, 240, 208, .38);
  --pc-gap: 28px;
  position: relative;
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 40px 0 24px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(51, 240, 208, .10), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(255, 106, 26, .09), transparent 62%),
    var(--ink);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 32px;
}

.page-contact .breadcrumbs {
  margin: 0 0 18px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-contact .breadcrumbs a {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .breadcrumbs a:hover,
.page-contact .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .contact-hero__lead h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-size: clamp(38px, 8vw, 72px);
  line-height: 1.02;
  letter-spacing: -.01em;
  font-weight: 600;
  color: var(--cream);
}

.page-contact .contact-hero__lead .lede {
  max-width: 46ch;
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--cream);
  opacity: .82;
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.page-contact .hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-contact .hf-num {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .hf-txt {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mute);
}

.page-contact .contact-hero__visual {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--coal);
  box-shadow: var(--shadow-2);
}

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

.page-contact .visual-plate {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 20px 20px;
  background: linear-gradient(180deg, transparent, rgba(11, 31, 23, .94) 42%);
}

.page-contact .visual-plate p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--cream);
  opacity: .86;
}

/* ---------- 联系方式 ---------- */
.page-contact .channel-card {
  padding: 30px 26px;
  border-left: 3px solid var(--cyan);
}

.page-contact .channel-card__label {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-contact .channel-card__main {
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: clamp(20px, 4.6vw, 30px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .channel-card__hint {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cream);
  opacity: .8;
}

.page-contact .channel-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-contact .channel-line {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-left: 1px solid var(--line-2);
}

.page-contact .channel-line__key {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-contact .channel-line__val {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--cream);
  word-break: break-word;
}

.page-contact .channel-line__note {
  font-size: 13px;
  color: var(--mute);
}

.page-contact .slot-note {
  margin: 4px 0 0;
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mute);
  background: var(--tint-orange);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}

/* ---------- 反馈流程 ---------- */
.page-contact .contact-steps {
  background: linear-gradient(180deg, var(--ink), var(--coal));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .steps {
  display: grid;
  gap: 2px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-contact .step {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-contact .step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .step__num {
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--orange);
}

.page-contact .step__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--cream);
}

.page-contact .step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cream);
  opacity: .78;
}

.page-contact .steps-visual {
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: var(--brown);
}

.page-contact .steps-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-contact .steps-visual .img-frame__caption {
  margin: 0;
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px solid var(--line);
}

/* ---------- 设备入口 ---------- */
.page-contact .contact-devices {
  background: var(--ink);
}

.page-contact .device-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 24px;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-contact .device-card:hover {
  transform: translateY(-4px);
  border-color: var(--pc-glow-line);
}

.page-contact .device-card__tag {
  align-self: flex-start;
}

.page-contact .device-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--cream);
}

.page-contact .device-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mute);
}

.page-contact .device-footnote {
  margin: 26px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--orange);
  font-size: 15px;
  line-height: 1.75;
  color: var(--cream);
  opacity: .82;
}

.page-contact .device-footnote a,
.page-contact .speed-copy__tail a,
.page-contact .side-band__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(51, 240, 208, .4);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-contact .device-footnote a:hover,
.page-contact .speed-copy__tail a:hover,
.page-contact .side-band__links a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 加载速度 ---------- */
.page-contact .contact-speed {
  background:
    radial-gradient(80% 100% at 100% 0%, rgba(51, 240, 208, .08), transparent 60%),
    var(--coal);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .speed-panel {
  padding: 28px 24px;
}

.page-contact .speed-panel .display-num {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 8px 0 14px;
  font-family: var(--font-num);
  font-size: clamp(58px, 15vw, 104px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .speed-panel .display-num__unit {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--mute);
}

.page-contact .speed-panel__text {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cream);
  opacity: .82;
}

.page-contact .speed-panel__scale {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin: 12px 0 0;
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--mute);
}

.page-contact .speed-copy h2 {
  margin: 0 0 22px;
  font-family: var(--font-head);
  font-size: clamp(28px, 6vw, 42px);
  font-weight: 600;
  line-height: 1.08;
  color: var(--cream);
}

.page-contact .speed-list {
  margin: 0 0 20px;
  padding: 0;
}

.page-contact .speed-list__row {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-contact .speed-list__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-contact .speed-list__row dt {
  margin-bottom: 6px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-contact .speed-list__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cream);
  opacity: .8;
}

.page-contact .speed-copy__tail {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------- 商务合作 ---------- */
.page-contact .contact-biz {
  background: var(--ink);
}

.page-contact .biz-band {
  display: grid;
  gap: 26px;
  padding: 30px 24px;
  border-top: 3px solid var(--orange);
}

.page-contact .biz-band__left h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(26px, 5.6vw, 38px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--cream);
}

.page-contact .biz-band__left p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--cream);
  opacity: .8;
}

.page-contact .biz-band__right {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-contact .biz-mail {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(16px, 3.6vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .biz-note {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mute);
}

/* ---------- 折叠侧带 ---------- */
.page-contact .side-band {
  background: var(--pc-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r);
  overflow: hidden;
}

.page-contact .side-band summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 20px 22px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .side-band__title {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  color: var(--cream);
}

.page-contact .side-band__hint {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-contact .side-band[open] .side-band__hint {
  color: var(--cyan);
}

.page-contact .side-band__body {
  padding: 0 22px 24px;
  border-top: 1px solid var(--line);
}

.page-contact .check-list {
  margin: 18px 0;
  padding: 0;
  list-style: none;
}

.page-contact .check-list li {
  position: relative;
  padding: 0 0 12px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cream);
  opacity: .84;
}

.page-contact .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--cyan);
}

.page-contact .side-band__links {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-contact .contact-hero {
    padding: 52px 0 32px;
  }

  .page-contact .split {
    gap: var(--pc-gap);
  }

  .page-contact .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }

  .page-contact .step:nth-child(2) {
    border-top: 1px solid var(--line);
  }

  .page-contact .step:last-child {
    border-bottom: 1px solid var(--line);
  }

  .page-contact .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .biz-band {
    grid-template-columns: 1.3fr .7fr;
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-contact .contact-hero {
    padding: 64px 0 44px;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: 1.1fr .9fr;
    align-items: center;
    gap: 48px;
  }

  .page-contact .split {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
  }

  .page-contact .split--reverse {
    grid-template-columns: .85fr 1.15fr;
  }

  .page-contact .split--reverse .speed-panel {
    order: 2;
  }

  .page-contact .split--reverse .speed-copy {
    order: 1;
  }

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

  .page-contact .biz-band {
    padding: 40px 44px;
    gap: 40px;
  }

  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-contact .step {
    grid-template-columns: 1fr;
    gap: 10px;
    border-bottom: 1px solid var(--line);
  }

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

  .page-contact .speed-panel {
    padding: 36px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .device-card {
    transition: none;
  }

  .page-contact .device-card:hover {
    transform: none;
  }
}