.page-contact {
  --ct-card-bg: var(--panel);
  --ct-card-line: var(--line);
  --ct-prose: 40ch;
  padding-bottom: var(--sp-6);
}

.page-contact .contact-hero {
  padding-top: var(--sp-3);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  align-items: end;
}

.page-contact .contact-hero__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-sans);
  font-size: clamp(2rem, 7.2vw, 4.1rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--white);
  max-width: 20ch;
}

.page-contact .contact-hero__text .lede {
  margin: 0 0 var(--sp-2);
  max-width: 40ch;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.65;
  color: var(--frost);
}

.page-contact .contact-hero__text .body {
  margin: 0;
  max-width: var(--ct-prose);
  color: var(--mute);
  line-height: 1.8;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

.page-contact .contact-hero__figure {
  margin: 0;
}

.page-contact .contact-hero__figure .media-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--ct-card-line);
}

.page-contact .contact-hero__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-contact .contact-sechead {
  max-width: 62ch;
}

.page-contact .contact-sechead__title {
  margin: var(--sp-1) 0 var(--sp-2);
  font-family: var(--font-sans);
  font-size: clamp(1.55rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .contact-sechead .body {
  margin: 0;
  max-width: var(--ct-prose);
  color: var(--mute);
  line-height: 1.8;
}

/* ---------- 渠道卡 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: var(--sp-4);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-3) var(--sp-3);
  border: 1px solid var(--ct-card-line);
  border-radius: var(--r-lg);
  background: var(--ct-card-bg);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  background: var(--ct-accent, var(--green));
}

.page-contact .channel-card--live {
  --ct-accent: var(--green);
}

.page-contact .channel-card--mail {
  --ct-accent: var(--orange);
}

.page-contact .channel-card--phone {
  --ct-accent: var(--teal);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--ct-accent, var(--green));
  background-color: rgba(61, 255, 158, 0.06);
}

.page-contact .channel-card__title {
  margin: 0;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--white);
}

.page-contact .channel-card__desc {
  margin: 0;
  color: var(--frost);
  line-height: 1.75;
}

.page-contact .channel-card__value {
  margin: 0;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 700;
  color: var(--ct-accent, var(--green));
  letter-spacing: 0.04em;
  word-break: break-word;
}

.page-contact .channel-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-contact .channel-card__list li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-contact .channel-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: var(--pill);
  background: var(--ct-accent, var(--green));
}

.page-contact .channel-card__meta {
  margin: auto 0 0;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--ct-card-line);
  color: var(--mute);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ---------- 纠错流程 ---------- */
.page-contact .contact-flow__grid {
  align-items: start;
  row-gap: var(--sp-4);
}

.page-contact .contact-flow__panel {
  border-radius: var(--r-xl);
  border: 1px solid var(--ct-card-line);
  background: var(--ct-card-bg);
  padding: var(--sp-3);
}

.page-contact .contact-flow__title {
  margin: var(--sp-1) 0 var(--sp-2);
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--white);
}

.page-contact .flow-list {
  list-style: none;
  counter-reset: ct-flow;
  margin: var(--sp-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .flow-list li {
  counter-increment: ct-flow;
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: var(--sp-2);
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--ct-card-line);
}

.page-contact .flow-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .flow-list li::before {
  content: "0" counter(ct-flow);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--green);
  padding-top: 0.3rem;
}

.page-contact .flow-list__title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
}

.page-contact .flow-list__desc {
  margin: 0;
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-contact .contact-flow__aside {
  display: grid;
  gap: var(--sp-3);
}

.page-contact .latency-card {
  padding: var(--sp-3);
  border: 1px solid var(--ct-card-line);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(255, 122, 41, 0.14), rgba(8, 20, 38, 0) 62%), var(--ink);
}

.page-contact .latency-card__value {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin: var(--sp-1) 0 var(--sp-2);
}

.page-contact .latency-card__num {
  font-size: clamp(3.2rem, 13vw, 5.4rem);
  font-weight: 700;
  line-height: 0.92;
  color: var(--orange);
}

.page-contact .latency-card__unit {
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--frost);
}

.page-contact .latency-card__desc {
  margin: 0;
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-contact .flow-map {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-contact .flow-map line {
  stroke: var(--line);
  stroke-width: 2;
}

.page-contact .flow-map circle {
  fill: var(--ink);
  stroke: var(--green);
  stroke-width: 2;
}

.page-contact .flow-map circle:last-of-type {
  fill: var(--green);
  stroke: var(--green);
}

.page-contact .flow-map text {
  fill: var(--mute);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ---------- 合作 ---------- */
.page-contact .contact-partner .contact-sechead .body {
  color: var(--mute);
}

.page-contact .partner-list {
  margin-top: var(--sp-4);
  border-top: 1px solid var(--line);
}

.page-contact .partner-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-1);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 160ms ease;
}

.page-contact .partner-item:hover,
.page-contact .partner-item:focus-within {
  background-color: rgba(61, 255, 158, 0.05);
}

.page-contact .partner-item__tag {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--green);
}

.page-contact .partner-item__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 800;
  color: var(--white);
}

.page-contact .partner-item__desc {
  margin: 0;
  max-width: 56ch;
  color: var(--mute);
  line-height: 1.8;
}

.page-contact .prep-panel {
  margin-top: var(--sp-4);
  padding: var(--sp-3);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--panel);
}

.page-contact .prep-panel__title {
  margin: 0 0 var(--sp-2);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--white);
}

.page-contact .prep-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .prep-panel__list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--line);
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-contact .prep-panel__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .prep-panel__key {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--teal);
}

/* ---------- 北京地区 ---------- */
.page-contact .beijing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  align-items: center;
}

.page-contact .beijing-grid__figure {
  margin: 0;
}

.page-contact .beijing-grid__figure .media-frame {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--ct-card-line);
}

.page-contact .beijing-grid__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 7;
}

.page-contact .beijing-grid__title {
  margin: var(--sp-1) 0 var(--sp-2);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.18;
  color: var(--white);
}

.page-contact .beijing-grid__text .body {
  margin: 0 0 var(--sp-3);
  max-width: var(--ct-prose);
  color: var(--mute);
  line-height: 1.8;
}

.page-contact .beijing-list {
  list-style: none;
  margin: 0 0 var(--sp-3);
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-contact .beijing-list li {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: var(--sp-2);
  align-items: start;
  color: var(--frost);
  font-size: 0.98rem;
  line-height: 1.7;
}

.page-contact .beijing-list__dot {
  width: 10px;
  height: 10px;
  margin-top: 0.55em;
  border-radius: var(--pill);
  background: var(--amber);
}

.page-contact .beijing-grid__note {
  margin: 0;
  padding-left: var(--sp-2);
  border-left: 2px solid var(--teal);
  color: var(--mute);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 自查 ---------- */
.page-contact .selfcheck__wrap {
  max-width: 900px;
}

.page-contact .selfcheck__list {
  margin-top: var(--sp-3);
  border-top: 1px solid var(--line);
}

.page-contact .selfcheck__list .disclosure {
  border-bottom: 1px solid var(--line);
}

.page-contact .selfcheck__list .disclosure__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: var(--sp-3) 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  font-weight: 700;
  color: var(--frost);
  transition: color 160ms ease;
}

.page-contact .selfcheck__list .disclosure__trigger:hover,
.page-contact .selfcheck__list .disclosure__trigger:focus-visible {
  color: var(--green);
}

.page-contact .selfcheck__list .disclosure__trigger[aria-expanded="true"] {
  color: var(--white);
}

.page-contact .selfcheck__list .disclosure__panel {
  padding: 0 0 var(--sp-3);
}

.page-contact .selfcheck__list .disclosure__panel p {
  margin: 0;
  max-width: 58ch;
  color: var(--mute);
  line-height: 1.8;
}

.page-contact .selfcheck__foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-contact .contact-flow__panel,
  .page-contact .latency-card {
    padding: var(--sp-4);
  }

  .page-contact .partner-item {
    grid-template-columns: 3.5rem 1fr;
    gap: var(--sp-2);
  }

  .page-contact .prep-panel__list li {
    grid-template-columns: 8rem 1fr;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(2rem, 5vw, 5rem);
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(12, 1fr);
    align-items: start;
  }

  .page-contact .channel-card:nth-child(1) {
    grid-column: span 5;
    margin-top: 0;
  }

  .page-contact .channel-card:nth-child(2) {
    grid-column: span 4;
    margin-top: var(--sp-4);
  }

  .page-contact .channel-card:nth-child(3) {
    grid-column: span 3;
    margin-top: var(--sp-2);
  }

  .page-contact .beijing-grid {
    grid-template-columns: 6fr 5fr;
    gap: clamp(2rem, 5vw, 5rem);
  }

  .page-contact .partner-list {
    margin-top: var(--sp-4);
  }
}

@media (min-width: 1280px) {
  .page-contact .contact-hero__title {
    max-width: 24ch;
  }

  .page-contact .channel-card__desc {
    min-height: 5.2em;
  }
}