.page-contact {
  --pc-mail: var(--neon);
  --pc-phone: var(--orange);
  --pc-form: var(--ice-light);
  background: var(--bg);
  color: var(--fg);
  overflow-x: hidden;
}

.page-contact .label-mono {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin: 0;
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 16px 0 0;
  font-size: 13px;
  color: var(--fg-mute);
}

.page-contact .breadcrumb a {
  color: var(--ice-light);
  text-decoration: none;
}

.page-contact .breadcrumb a:hover {
  color: var(--neon);
}

.page-contact .breadcrumb span[aria-current="page"] {
  color: var(--fg-mute);
}

/* 首屏 */
.page-contact .contact-hero {
  padding: 22px 0 clamp(30px, 5vw, 54px);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 24px;
}

.page-contact h1 {
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: var(--fs-h1);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 16ch;
}

.page-contact .contact-hero__lead {
  margin: 18px 0 0;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--ice-pale);
  max-width: 48ch;
}

.page-contact .contact-hero__panel {
  border: 2px solid var(--line-strong);
  background: var(--bg-alt);
  box-shadow: var(--shadow-hard);
  border-radius: var(--radius);
  padding: 18px 20px 20px;
}

.page-contact .contact-hero__big {
  font-family: var(--ff-mono);
  font-size: clamp(1.55rem, 4vw, 2.15rem);
  letter-spacing: -0.01em;
  color: var(--neon);
  margin: 8px 0 6px;
}

.page-contact .contact-hero__panel-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg-mute);
}

.page-contact .contact-facts {
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
}

.page-contact .contact-facts div {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.page-contact .contact-facts dt {
  color: var(--fg-mute);
}

.page-contact .contact-facts dd {
  margin: 0;
  font-family: var(--ff-mono);
  color: var(--ice-white);
}

/* 通用章节 */
.page-contact .pc-section {
  padding: clamp(34px, 6vw, 62px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .pc-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: 24px;
}

.page-contact .pc-head h2 {
  font-family: var(--ff-display);
  font-weight: 900;
  font-size: var(--fs-h2);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-contact .pc-head__note {
  margin: 0;
  flex: 1 1 260px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg-mute);
}

.page-contact .pc-index {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
  border: 1px solid var(--line-strong);
  padding: 2px 8px;
  align-self: center;
}

.page-contact .pc-footlink {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice-pale);
}

.page-contact .pc-footlink a {
  color: var(--ice-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 212, 240, 0.45);
}

.page-contact .pc-footlink a:hover {
  color: var(--neon);
  border-color: var(--neon);
}

/* 渠道识别图 */
.page-contact .channel-figure {
  margin: 0 0 24px;
}

.page-contact .channel-figure img {
  display: block;
  width: 100%;
  height: 160px;
  object-fit: cover;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  filter: saturate(0.85) contrast(1.05);
}

.page-contact .channel-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fg-mute);
}

/* 三列渠道卡 */
.page-contact .channel-deck {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .channel {
  --pc-accent: var(--pc-form);
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 18px 20px;
  background: var(--bg-alt);
  border: 2px solid var(--line-strong);
  border-top: 6px solid var(--pc-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.page-contact .channel--mail {
  --pc-accent: var(--pc-mail);
}

.page-contact .channel--phone {
  --pc-accent: var(--pc-phone);
}

.page-contact .channel--form {
  --pc-accent: var(--pc-form);
}

.page-contact .channel__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-contact .channel h3 {
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-contact .channel__icon {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 2px solid var(--pc-accent);
  color: var(--pc-accent);
}

.page-contact .channel__icon svg {
  width: 17px;
  height: 17px;
  display: block;
}

.page-contact .channel__fit {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ice-pale);
}

.page-contact .channel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-mute);
}

.page-contact .channel__list li {
  position: relative;
  padding-left: 16px;
}

.page-contact .channel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--pc-accent);
}

.page-contact .channel__value {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--ice-white);
  word-break: break-all;
}

.page-contact .channel__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  color: var(--ice-abyss);
  background: var(--pc-accent);
  border: 2px solid var(--pc-accent);
  border-radius: var(--radius);
  transition: transform var(--dur) linear, box-shadow var(--dur) linear;
}

.page-contact .channel__action:hover,
.page-contact .channel__action:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 rgba(232, 244, 250, 0.28);
}

/* 横向分流带 */
.page-contact .route-band {
  margin-top: 30px;
  padding: 18px 0;
  background: var(--bg-alt);
  border-top: 2px solid var(--line-strong);
  border-bottom: 2px solid var(--line-strong);
}

.page-contact .route-band__inner {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .route-band__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--ice-bright);
  font-size: 14px;
  line-height: 1.55;
}

.page-contact .route-band__item strong {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-contact .route-band__item span {
  color: var(--ice-pale);
}

/* 提交步骤 */
.page-contact .steps {
  list-style: none;
  counter-reset: pcstep;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .steps li {
  counter-increment: pcstep;
  position: relative;
  padding: 16px 18px 18px 54px;
  background: var(--bg-alt);
  border-left: 2px solid var(--ice-bright);
}

.page-contact .steps li::before {
  content: "0" counter(pcstep);
  position: absolute;
  left: 16px;
  top: 16px;
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--ice-light);
}

.page-contact .steps h3 {
  margin: 0 0 6px;
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.005em;
}

.page-contact .steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-mute);
}

/* 响应节奏表 */
.page-contact .sla {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.page-contact .sla caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fg-mute);
}

.page-contact .sla th,
.page-contact .sla td {
  text-align: left;
  vertical-align: top;
  padding: 11px 8px;
  border-bottom: 1px solid var(--line);
  line-height: 1.6;
}

.page-contact .sla thead th {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
  border-bottom: 2px solid var(--line-strong);
  white-space: nowrap;
}

.page-contact .sla tbody td:first-child {
  color: var(--ice-white);
  font-weight: 600;
}

.page-contact .sla tbody td {
  color: var(--fg-mute);
}

.page-contact .sla .num {
  font-family: var(--ff-mono);
  color: var(--neon);
}

.page-contact .sla tbody tr:hover {
  background: rgba(127, 212, 240, 0.06);
}

/* 合作 */
.page-contact .partners {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .partners__text p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice-pale);
}

.page-contact .partners__text p:last-child {
  margin-bottom: 0;
}

.page-contact .subject-format {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ice-deep);
  border: 1px solid var(--line-strong);
  border-left: 6px solid var(--neon);
  border-radius: var(--radius);
  font-family: var(--ff-mono);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ice-pale);
  word-break: break-word;
}

.page-contact .subject-format__label {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

/* 提交前清单 */
.page-contact .checklist {
  display: grid;
  gap: 10px;
}

.page-contact .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.page-contact .check-item:hover {
  border-color: var(--line-strong);
}

.page-contact .check-item input {
  -webkit-appearance: none;
  appearance: none;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin: 2px 0 0;
  background: transparent;
  border: 2px solid var(--ice-bright);
  border-radius: 0;
  cursor: pointer;
}

.page-contact .check-item input::after {
  content: "";
  width: 11px;
  height: 6px;
  margin-top: -3px;
  border-left: 2.5px solid var(--ice-abyss);
  border-bottom: 2.5px solid var(--ice-abyss);
  transform: rotate(-45deg);
  opacity: 0;
}

.page-contact .check-item input:checked {
  background: var(--neon);
  border-color: var(--neon);
}

.page-contact .check-item input:checked::after {
  opacity: 1;
}

.page-contact .check-item input:focus-visible {
  outline: 2px solid var(--ice-light);
  outline-offset: 2px;
}

.page-contact .check-item span {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ice-pale);
}

.page-contact .check-item input:checked ~ span {
  color: var(--fg-mute);
}

.page-contact .check-done {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 6px 0 0;
  padding: 12px 16px;
  background: rgba(182, 255, 60, 0.1);
  border: 1px solid rgba(182, 255, 60, 0.42);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.6;
  color: var(--neon);
}

.page-contact .checklist:has(input:not(:checked)) .check-done {
  display: none;
}

/* 站点信息 */
.page-contact .site-info {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 62px) 0;
  background: var(--ice-deep);
  border-top: 2px solid var(--line-strong);
}

.page-contact .site-info__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: grayscale(1) contrast(1.1);
}

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

.page-contact .info-rows {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--line-strong);
}

.page-contact .info-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .info-row dt {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.page-contact .info-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice-white);
  word-break: break-word;
}

.page-contact .info-row dd.num {
  font-family: var(--ff-mono);
}

.page-contact .info-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-contact .info-links a {
  color: var(--ice-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 212, 240, 0.42);
  padding-bottom: 1px;
}

.page-contact .info-links a:hover,
.page-contact .info-links a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
}

/* 平板及以上 */
@media (min-width: 760px) {
  .page-contact .channel-figure img {
    height: 140px;
  }

  .page-contact .sla {
    font-size: 14px;
  }

  .page-contact .sla th,
  .page-contact .sla td {
    padding: 13px 12px;
  }

  .page-contact .route-band__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }

  .page-contact .info-row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: end;
  }

  .page-contact .channel-deck {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-contact .partners {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .channel-figure img {
    height: 170px;
  }
}

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

  .page-contact .channel__action:hover {
    transform: none;
  }
}