.page-contact {
  --pc-gap: clamp(18px, 2.6vw, 32px);
  --pc-pad: clamp(38px, 5.4vw, 70px);
  --pc-card-bg: var(--c-panel);

  color: var(--c-text);
  font-family: var(--f-body);
  font-size: var(--fs-2);
  line-height: 1.75;
  background: var(--c-night);
  overflow-x: clip;
}

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

.page-contact > section {
  padding-block: var(--pc-pad);
  border-bottom: 1px solid var(--c-line);
}

.page-contact > section:last-of-type {
  border-bottom: 0;
}

/* ---------- 面包屑 ---------- */

.page-contact .breadcrumb {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-size: var(--fs-1);
  color: var(--c-muted);
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  color: var(--c-line);
}

.page-contact .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(26px, 4.6vw, 58px) clamp(40px, 6vw, 76px);
  background:
    radial-gradient(130% 100% at 92% 0%, rgba(var(--rgb-lime), 0.13), transparent 55%),
    linear-gradient(160deg, var(--c-teal) 0%, var(--c-night) 64%);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
}

.page-contact .eyebrow {
  margin: 0 0 10px;
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--c-lime);
}

.page-contact .contact-hero__title {
  margin: 0 0 16px;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-contact .contact-hero__lede {
  margin: 0 0 22px;
  max-width: 48ch;
  font-size: var(--fs-3);
  color: var(--c-text);
}

.page-contact .hero-facts {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .hero-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 14px;
  padding: 11px 15px;
  background: var(--pc-card-bg);
}

.page-contact .hero-facts__k {
  font-size: var(--fs-1);
  color: var(--c-muted);
}

.page-contact .hero-facts__v {
  font-size: var(--fs-2);
  color: var(--c-text);
}

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

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

.page-contact .contact-hero__figure .figure-media {
  overflow: hidden;
  border: 1px solid var(--c-line);
  box-shadow: var(--ink-shadow-lg);
}

.page-contact .figure-caption {
  margin-top: 12px;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 章节头 ---------- */

.page-contact .contact-head {
  display: grid;
  gap: 8px;
  max-width: 62ch;
}

.page-contact .chapter-no {
  font-family: var(--f-mono);
  font-size: var(--fs-1);
  letter-spacing: 0.1em;
  color: var(--c-lime);
}

.page-contact .section-title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.24;
}

.page-contact .contact-head__note {
  margin: 0;
  color: var(--c-muted);
}

/* ---------- 渠道一览 ---------- */

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--pc-card-bg);
  border: 1px solid var(--c-line);
}

.page-contact .channel-card--primary {
  border-left: 3px solid var(--c-lime);
  background:
    linear-gradient(180deg, rgba(var(--rgb-lime), 0.09), transparent 48%),
    var(--pc-card-bg);
}

.page-contact .channel-card__title {
  margin: 0;
  font-size: var(--fs-3);
  font-weight: 900;
  line-height: 1.3;
}

.page-contact .channel-card__value {
  margin: 0;
  font-size: var(--fs-3);
  line-height: 1.45;
  word-break: break-word;
  color: var(--c-text);
}

.page-contact .channel-card__use {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .copy-btn {
  align-self: flex-start;
  font-size: var(--fs-1);
}

/* ---------- 受理范围 ---------- */

.page-contact .scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-contact .scope-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .scope-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: clamp(16px, 2vw, 24px);
  background: var(--pc-card-bg);
}

.page-contact .scope-item__no {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  font-size: var(--fs-1);
  color: var(--c-lime);
  border: 1px solid var(--c-line);
  background: rgba(var(--rgb-lime), 0.08);
}

.page-contact .scope-item__title {
  margin: 0 0 6px;
  font-size: var(--fs-3);
  font-weight: 900;
  line-height: 1.3;
}

.page-contact .scope-item__body p {
  margin: 0;
  font-size: var(--fs-2);
  color: var(--c-muted);
}

.page-contact .sla-card {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--c-teal);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-lime);
}

.page-contact .sla-card .eyebrow {
  margin-bottom: 8px;
  color: var(--c-muted);
  letter-spacing: 0.1em;
}

.page-contact .sla-card__value {
  margin: 0 0 14px;
  font-family: var(--f-head);
  font-size: var(--fs-4);
  font-weight: 900;
  line-height: 1.3;
}

.page-contact .sla-card__note {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .sla-card__note + .sla-card__note {
  margin-top: 12px;
}

.page-contact .scope-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

.page-contact .scope-figure .figure-media {
  overflow: hidden;
  border: 1px solid var(--c-line);
  box-shadow: var(--ink-shadow);
}

/* ---------- 响应刻度 ---------- */

.page-contact .resp-axis {
  position: relative;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-contact .resp-axis::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-lime), rgba(var(--rgb-lime), 0.12));
}

.page-contact .resp-step {
  position: relative;
  padding-left: 34px;
}

.page-contact .resp-step__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-lime);
  box-shadow: 0 0 0 4px rgba(var(--rgb-lime), 0.12);
}

.page-contact .resp-step__time {
  margin: 0 0 6px;
  font-size: var(--fs-1);
  color: var(--c-lime);
}

.page-contact .resp-step__title {
  margin: 0 0 6px;
  font-size: var(--fs-3);
  font-weight: 900;
  line-height: 1.3;
}

.page-contact .resp-step__text {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 提交清单 ---------- */

.page-contact .check-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-contact .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  background: var(--pc-card-bg);
  border: 1px solid var(--c-line);
  cursor: pointer;
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-contact .check-item + .check-item {
  margin-top: 10px;
}

.page-contact .check-item:hover {
  border-color: rgba(var(--rgb-lime), 0.5);
}

.page-contact .check-item input {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 5px 0 0;
  display: grid;
  place-items: center;
  background: var(--c-night);
  border: 2px solid var(--c-line);
  cursor: pointer;
  transition: background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .check-item input::after {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 2px solid var(--c-night);
  border-bottom: 2px solid var(--c-night);
  transform: rotate(-45deg) scale(0);
  transition: transform 0.16s var(--ease);
}

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

.page-contact .check-item input:checked::after {
  transform: rotate(-45deg) scale(1);
}

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

.page-contact .check-item__text {
  display: grid;
  gap: 4px;
}

.page-contact .check-item__text strong {
  font-size: var(--fs-2);
  font-weight: 700;
}

.page-contact .check-item__text em {
  font-style: normal;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .mail-template {
  margin: 10px 0 14px;
  padding: 16px 18px;
  font-family: var(--f-mono);
  font-size: var(--fs-1);
  line-height: 1.95;
  color: var(--c-text);
  background: rgba(11, 10, 31, 0.72);
  border: 1px dashed var(--c-line);
  border-left: 3px solid var(--c-gold);
  white-space: pre-wrap;
  overflow-x: auto;
}

/* ---------- 配置咨询 ---------- */

.page-contact .ask-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pc-gap);
  margin-top: clamp(22px, 3.4vw, 36px);
}

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

.page-contact .ask-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 2px;
  border-bottom: 1px dashed var(--c-line);
}

.page-contact .ask-list__no {
  font-size: var(--fs-1);
  color: var(--c-amber);
}

.page-contact .ask-body p {
  margin: 0 0 14px;
  font-size: var(--fs-2);
}

.page-contact .spec-list {
  margin: 0 0 16px;
  padding: 0;
  border: 1px solid var(--c-line);
}

.page-contact .spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 16px;
  background: var(--pc-card-bg);
}

.page-contact .spec-row + .spec-row {
  border-top: 1px solid var(--c-line);
}

.page-contact .spec-row dt {
  font-size: var(--fs-1);
  color: var(--c-muted);
}

.page-contact .spec-row dd {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.8;
}

.page-contact .spec-row:nth-child(1) dt { color: var(--c-amber); }
.page-contact .spec-row:nth-child(2) dt { color: var(--c-blue); }
.page-contact .spec-row:nth-child(3) dt { color: var(--c-magenta); }

/* ---------- 无效提交 ---------- */

.page-contact .invalid-list {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-contact .invalid-list li {
  padding: 14px 16px;
  font-size: var(--fs-2);
  color: var(--c-text);
  background: rgba(var(--rgb-wine), 0.28);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-wine);
}

.page-contact .invalid-disclosure {
  margin-top: clamp(18px, 2.4vw, 26px);
}

/* ---------- 备案 ---------- */

.page-contact .registry-card {
  padding: clamp(22px, 3vw, 38px);
  background:
    linear-gradient(150deg, var(--c-teal) 0%, var(--c-panel) 70%);
  border: 1px solid var(--c-line);
  box-shadow: var(--ink-shadow-lg);
}

.page-contact .registry-card__head {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-contact .registry-list {
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .registry-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 16px;
  background: rgba(11, 10, 31, 0.6);
}

.page-contact .registry-row dt {
  font-size: var(--fs-1);
  color: var(--c-muted);
}

.page-contact .registry-row dd {
  margin: 0;
  font-size: var(--fs-2);
  word-break: break-word;
}

.page-contact .registry-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.page-contact .registry-note {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: var(--fs-1);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--c-line);
}

.page-contact .related-links a {
  font-size: var(--fs-1);
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 2px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .related-links a:hover,
.page-contact .related-links a:focus-visible {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

/* ---------- 桌面版 ---------- */

@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-contact .spec-row,
  .page-contact .registry-row {
    grid-template-columns: minmax(96px, 140px) minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-contact .contact-hero__figure {
    transform: rotate(-1.2deg);
  }

  .page-contact .check-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .ask-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(26px, 3.6vw, 46px);
  }
}

@media (min-width: 960px) {
  .page-contact .scope-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }

  .page-contact .sla-card {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 820px) {
  .page-contact .resp-axis {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 42px);
    padding-top: 30px;
  }

  .page-contact .resp-axis::before {
    left: 0;
    right: 0;
    top: 9px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--c-lime), rgba(var(--rgb-lime), 0.15));
  }

  .page-contact .resp-step {
    padding-left: 0;
  }

  .page-contact .resp-step__dot {
    top: -30px;
    left: 0;
  }
}

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

  .page-contact .check-item,
  .page-contact .check-item input,
  .page-contact .check-item input::after,
  .page-contact .breadcrumb a,
  .page-contact .related-links a {
    transition: none;
  }
}