.page-contact {
  --c-bg: #0B0F1A;
  --c-panel: #131B2B;
  --c-green: #C6FF00;
  --c-cyan: #00E5FF;
  --c-metal: #A3B5C6;
  --c-text: #F2F6F9;
  --c-muted: #8A9BAE;
  --c-warn: #FFB300;
  --c-card-line: rgba(19, 27, 43, 0.9);
  --gradient-green: linear-gradient(135deg, #C6FF00 0%, #00E5FF 100%);
  --shadow-green: 0 0 20px rgba(198, 255, 0, 0.18);
  position: relative;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: "PingFang SC", "Microsoft YaHei", "Roboto", sans-serif;
  overflow: hidden;
}

.page-contact .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}

.page-contact .section {
  padding: clamp(56px, 8vw, 104px) 0;
  position: relative;
}

.page-contact .section--tight {
  padding: clamp(40px, 6vw, 72px) 0;
}

.page-contact .section-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 40px;
}

.page-contact .section-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 32px;
  padding: 0 10px;
  background: var(--c-green);
  color: #0B0F1A;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  margin-top: 6px;
}

.page-contact .section-title {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 900;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.2;
  margin: 0 0 6px;
}

.page-contact .section-meta {
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0;
}

.page-contact .tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 2px;
  background: rgba(19, 27, 43, 0.9);
  color: var(--c-metal);
  border: 1px solid rgba(163, 181, 198, 0.3);
}

.page-contact .tag-green {
  color: var(--c-green);
  border-color: rgba(198, 255, 0, 0.4);
}

.page-contact .tag-cyan {
  color: var(--c-cyan);
  border-color: rgba(0, 229, 255, 0.4);
}

.page-contact .tag-orange {
  color: var(--c-warn);
  border-color: rgba(255, 179, 0, 0.4);
}

.page-contact .text-cyan {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  transition: border-color 0.2s ease;
}

.page-contact .text-cyan:hover {
  border-bottom-color: var(--c-cyan);
}

/* hero */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(72px, 10vw, 120px) 0 clamp(56px, 6vw, 80px);
  border-bottom: 1px solid rgba(163, 181, 198, 0.12);
}

.page-contact .contact-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  mask-image: linear-gradient(135deg, #000 60%, transparent 100%);
}

.page-contact .contact-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-contact .contact-hero__left {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__index {
  display: inline-flex;
  align-items: center;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  color: var(--c-cyan);
  letter-spacing: 0.14em;
  margin: 0 0 20px;
  padding: 6px 14px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  background: rgba(0, 229, 255, 0.06);
}

.page-contact .contact-hero h1 {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 900;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.14;
  margin: 0 0 20px;
  max-width: 800px;
}

.page-contact .contact-hero h1 em {
  display: block;
  font-style: normal;
  font-size: 0.56em;
  font-weight: 800;
  color: var(--c-muted);
  letter-spacing: 0.02em;
  margin-top: 8px;
}

.page-contact .contact-hero__lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-metal);
  max-width: 560px;
  margin: 0 0 20px;
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .contact-hero__visual {
  position: relative;
  width: 100%;
  height: 240px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(0, 229, 255, 0.15);
  background: rgba(19, 27, 43, 0.5);
}

.page-contact .contact-hero__bg-image {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  transform: translate(-50%, -50%);
  filter: saturate(0.7) contrast(1.1) opacity(0.65);
}

/* radar */
.page-contact .radar-wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 280px;
  height: 280px;
  z-index: 2;
  pointer-events: none;
}

.page-contact .radar-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.35);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.page-contact .radar-ring--outer {
  width: 100%;
  height: 100%;
}

.page-contact .radar-ring--mid {
  width: 66%;
  height: 66%;
  border-color: rgba(198, 255, 0, 0.3);
}

.page-contact .radar-ring--inner {
  width: 33%;
  height: 33%;
  border-color: rgba(198, 255, 0, 0.5);
}

.page-contact .radar-sweep {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50%;
  height: 50%;
  background: linear-gradient(90deg, transparent 98%, rgba(198, 255, 0, 0.25) 100%);
  transform-origin: 0 0;
  opacity: 0.7;
}

.page-contact .radar-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  z-index: 2;
}

.page-contact .radar-core__dot {
  width: 16px;
  height: 16px;
  background: var(--c-green);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(198, 255, 0, 0.6), 0 0 48px rgba(198, 255, 0, 0.25);
}

.page-contact .radar-core__label {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
  color: var(--c-green);
  letter-spacing: 0.1em;
}

.page-contact .radar-axis {
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(0, 229, 255, 0.2);
}

.page-contact .radar-axis--x {
  width: 100%;
  height: 1px;
  transform: translate(-50%, -50%);
}

.page-contact .radar-axis--y {
  width: 1px;
  height: 100%;
  transform: translate(-50%, -50%);
}

.page-contact .radar-tick {
  position: absolute;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  color: var(--c-cyan);
  z-index: 2;
}

.page-contact .radar-tick--1 { top: 6px; left: 8px; }
.page-contact .radar-tick--2 { top: 6px; right: 8px; }
.page-contact .radar-tick--3 { bottom: 6px; right: 8px; }
.page-contact .radar-tick--4 { bottom: 6px; left: 8px; }
.page-contact .radar-tick--5 { top: 50%; left: 4px; }

/* contact channels */
.page-contact .contact-channels {
  position: relative;
}

.page-contact .contact-channels__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .contact-card {
  position: relative;
  background: linear-gradient(145deg, #131B2B 0%, #0D1421 100%);
  border: 1px solid rgba(163, 181, 198, 0.16);
  padding: 28px 24px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--c-green);
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.page-contact .contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(198, 255, 0, 0.4);
  box-shadow: var(--shadow-green), 0 20px 40px rgba(0, 0, 0, 0.3);
}

.page-contact .contact-card:hover::before {
  opacity: 1;
}

.page-contact .contact-card--phone::before {
  background: var(--c-cyan);
  opacity: 0.5;
}

.page-contact .contact-card--phone:hover {
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.15), 0 20px 40px rgba(0, 0, 0, 0.3);
}

.page-contact .contact-card--phone:hover::before {
  opacity: 1;
}

.page-contact .contact-card--address::before {
  background: var(--c-warn);
  opacity: 0.5;
}

.page-contact .contact-card--address:hover {
  border-color: rgba(255, 179, 0, 0.4);
  box-shadow: 0 0 20px rgba(255, 179, 0, 0.12), 0 20px 40px rgba(0, 0, 0, 0.3);
}

.page-contact .contact-card--address:hover::before {
  opacity: 1;
}

.page-contact .contact-card__topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.page-contact .contact-card__code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  color: var(--c-muted);
  letter-spacing: 0.1em;
}

.page-contact .contact-card__title {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 20px;
  font-weight: 800;
  margin: 0 0 8px;
}

.page-contact .contact-card__desc {
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.6;
  margin: 0 0 20px;
}

.page-contact .contact-card__value {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin: 0 0 16px;
  word-break: break-all;
  color: var(--c-text);
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.3);
  border-left: 2px solid var(--c-green);
}

.page-contact .contact-card--phone .contact-card__value {
  border-left-color: var(--c-cyan);
  font-size: 20px;
}

.page-contact .contact-card--address .contact-card__value {
  border-left-color: var(--c-warn);
  font-size: 15px;
}

.page-contact .contact-card__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-contact .contact-card__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  background: transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
}

.page-contact .contact-card__btn--primary {
  background: var(--c-green);
  color: #0B0F1A;
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
  font-weight: 800;
}

.page-contact .contact-card__btn--primary:hover {
  box-shadow: 0 0 24px rgba(198, 255, 0, 0.4);
  transform: translateY(-2px);
}

.page-contact .contact-card__btn--secondary {
  border: 1px solid var(--c-cyan);
  color: var(--c-cyan);
  clip-path: polygon(4px 0, 100% 0, calc(100% - 4px) 100%, 0 100%);
}

.page-contact .contact-card__btn--secondary:hover {
  background: rgba(0, 229, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
  transform: translateY(-2px);
}

.page-contact .contact-card__btn--copy {
  font-size: 13px;
  color: var(--c-green);
  border: 1px solid rgba(198, 255, 0, 0.3);
  padding: 9px 14px;
  background: transparent;
}

.page-contact .contact-card__btn--copy:hover {
  background: rgba(198, 255, 0, 0.08);
  border-color: var(--c-green);
}

.page-contact .contact-card__note {
  font-size: 13px;
  color: var(--c-muted);
  padding: 8px 0;
}

.page-contact .contact-card__note--address {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px dashed rgba(255, 179, 0, 0.3);
  color: var(--c-warn);
  font-size: 12px;
}

/* support banner */
.page-contact .contact-support__banner {
  background: linear-gradient(160deg, rgba(198, 255, 0, 0.06) 0%, rgba(19, 27, 43, 0.92) 45%);
  border: 1px solid rgba(198, 255, 0, 0.2);
  padding: clamp(24px, 4vw, 40px);
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}

.page-contact .contact-support__banner::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 3px;
  background: var(--gradient-green);
}

.page-contact .contact-support__info {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.page-contact .contact-support__lead {
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-metal);
  margin: 0;
  max-width: 600px;
}

.page-contact .contact-support__table {
  display: flex;
  flex-direction: column;
  border-top: 1px solid rgba(163, 181, 198, 0.15);
}

.page-contact .contact-support__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(163, 181, 198, 0.12);
}

.page-contact .contact-support__label {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  color: var(--c-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-contact .contact-support__value {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
}

/* process */
.page-contact .contact-process {
  position: relative;
}

.page-contact .contact-process::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 40px;
  width: 1px;
  background: linear-gradient(180deg, rgba(198, 255, 0, 0.2), transparent);
}

.page-contact .contact-process__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

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

.page-contact .contact-process__item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(163, 181, 198, 0.08);
}

.page-contact .contact-process__item:last-child {
  border-bottom: none;
}

.page-contact .contact-process__step {
  flex-shrink: 0;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-green);
  padding: 4px 0;
}

.page-contact .contact-process__text h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 4px;
}

.page-contact .contact-process__text p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-muted);
  margin: 0;
}

.page-contact .contact-process__aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .contact-process__diagram {
  border: 1px solid rgba(0, 229, 255, 0.15);
  border-radius: 4px;
  overflow: hidden;
}

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

.page-contact .contact-process__working {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), transparent);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-contact .contact-process__working-label {
  font-size: 13px;
  color: var(--c-muted);
}

.page-contact .contact-process__working-value {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 36px;
  font-weight: 700;
  color: var(--c-cyan);
  line-height: 1.2;
}

.page-contact .contact-process__working-desc {
  font-size: 13px;
  color: var(--c-muted);
  line-height: 1.6;
}

/* boundary */
.page-contact .contact-boundary__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .contact-boundary__warning,
.page-contact .contact-boundary__notice,
.page-contact .contact-boundary__note {
  border: 1px solid rgba(163, 181, 198, 0.15);
  padding: 28px 24px;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-contact .contact-boundary__warning {
  border-top: 3px solid var(--c-warn);
}

.page-contact .contact-boundary__notice {
  border-top: 3px solid var(--c-cyan);
}

.page-contact .contact-boundary__note {
  border-top: 3px solid var(--c-green);
}

.page-contact .contact-boundary__warning:hover,
.page-contact .contact-boundary__notice:hover,
.page-contact .contact-boundary__note:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.3);
}

.page-contact .contact-boundary__badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: var(--c-warn);
  color: #0B0F1A;
  margin-bottom: 16px;
}

.page-contact .contact-boundary__badge--cyan {
  background: var(--c-cyan);
}

.page-contact .contact-boundary__badge--orange {
  background: var(--c-green);
}

.page-contact .contact-boundary h3 {
  font-size: 18px;
  font-weight: 800;
  margin: 0 0 8px;
}

.page-contact .contact-boundary p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  margin: 0;
}

/* links */
.page-contact .contact-links {
  border-top: 1px solid rgba(163, 181, 198, 0.1);
}

.page-contact .contact-links__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-contact .contact-links__intro {
  flex-shrink: 0;
}

.page-contact .contact-links__code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
  margin: 0 0 8px;
}

.page-contact .contact-links__intro h2 {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 24px;
  font-weight: 800;
  margin: 0;
}

.page-contact .contact-links__items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.page-contact .contact-links__item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 16px;
  border: 1px solid rgba(163, 181, 198, 0.15);
  text-decoration: none;
  color: var(--c-text);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  background: rgba(19, 27, 43, 0.5);
}

.page-contact .contact-links__item:hover {
  border-color: rgba(198, 255, 0, 0.4);
  transform: translateX(4px);
  box-shadow: var(--shadow-green);
}

.page-contact .contact-links__item-num {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  color: var(--c-green);
  flex-shrink: 0;
}

.page-contact .contact-links__item-text {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
}

.page-contact .contact-links__item-arrow {
  font-size: 20px;
  color: var(--c-muted);
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-contact .contact-links__item:hover .contact-links__item-arrow {
  color: var(--c-green);
  transform: translateX(4px);
}

/* data-reveal default state */
.page-contact [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-contact [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* media queries */
@media (min-width: 768px) {
  .page-contact .container {
    padding: 0 32px;
  }

  .page-contact .contact-hero__inner {
    article: center;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 48px;
  }

  .page-contact .contact-hero__visual {
    height: 340px;
  }

  .page-contact .contact-channels__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-contact .contact-card--address {
    grid-column: 1 / -1;
  }

  .page-contact .contact-support__banner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .page-contact .contact-support__info {
    flex: 1.1;
  }

  .page-contact .contact-support__table {
    flex: 0.9;
    border-top: none;
    border-left: 1px solid rgba(163, 181, 198, 0.15);
    padding-left: 24px;
  }

  .page-contact .contact-support__row {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
  }

  .page-contact .contact-support__label {
    text-transform: none;
  }

  .page-contact .contact-process__layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }

  .page-contact .contact-boundary__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .contact-links__inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .page-contact .contact-links__items {
    max-width: 560px;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-channels__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .contact-card--address {
    grid-column: auto;
  }

  .page-contact .contact-card {
    padding: 32px 28px;
  }

  .page-contact .contact-card__value {
    font-size: 15px;
  }

  .page-contact .contact-card--phone .contact-card__value {
    font-size: 22px;
  }

  .page-contact .contact-process::before {
    right: 60px;
  }

  .page-contact .contact-links__items {
    flex-direction: row;
    max-width: none;
    gap: 16px;
  }

  .page-contact .contact-links__item {
    flex: 1;
  }
}

@media (min-width: 1200px) {
  .page-contact .radar-wrap {
    width: 360px;
    height: 360px;
  }

  .page-contact .contact-hero__visual {
    height: 420px;
  }
}

/* max width guard */
@media (min-width: 1600px) {
  .page-contact .container {
    max-width: 1280px;
  }
}
</style>
```