.page-contact {
  --pc-radius: 2px;
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumb {
  padding-top: 22px;
}

/* ---------- 分屏首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-top: 20px;
  padding-bottom: 44px;
}

.page-contact .contact-hero__col--text .eyebrow {
  margin-bottom: 14px;
}

.page-contact .contact-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(29px, 6.4vw, 46px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--deep);
  margin: 0 0 18px;
}

.page-contact .contact-hero .lede {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0;
  max-width: 46ch;
}

/* 渠道清单：等宽对齐 */
.page-contact .channel-list {
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .channel-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .channel-row__key {
  font-family: var(--font-edit);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-soft);
}

.page-contact .channel-row__val {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  min-width: 0;
}

.page-contact .channel-row__data {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--carbon);
  overflow-wrap: anywhere;
  border-bottom: 1px solid var(--cyan-soft);
  padding-bottom: 2px;
}

.page-contact .copy-btn {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: var(--pc-radius);
  background: transparent;
  color: var(--text-mid);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  border-color: var(--cyan);
  color: var(--deep);
  background: var(--cyan-soft);
}

.page-contact .copy-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .copy-btn.is-copied {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  color: var(--deep);
}

.page-contact .channel-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-soft);
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  max-width: 48ch;
}

/* 首屏右侧：深蓝面板 + 玻璃层 */
.page-contact .flow-panel {
  position: relative;
  display: grid;
  background: var(--deep);
  border: 1px solid rgba(140, 151, 168, 0.24);
  border-radius: var(--pc-radius);
  overflow: hidden;
}

.page-contact .flow-panel__img {
  grid-area: 1 / 1;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  opacity: 0.42;
  filter: saturate(0.85);
}

.page-contact .flow-panel__glass {
  grid-area: 1 / 1;
  align-self: end;
  margin: 16px;
  padding: 18px 18px 16px;
  background: rgba(11, 27, 51, 0.68);
  border: 1px solid rgba(0, 194, 199, 0.3);
  border-radius: var(--pc-radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-contact .flow-panel__label {
  font-family: var(--font-edit);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-contact .flow-svg {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 12px;
}

.page-contact .flow-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 14px;
}

.page-contact .flow-legend a {
  display: block;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244, 247, 251, 0.86);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .flow-legend a::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-contact .flow-legend li:last-child a::before {
  background: var(--orange);
}

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

.page-contact .flow-legend a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: no-preference) {
  .page-contact .flow-svg polyline {
    stroke-dasharray: 4 10;
    animation: pc-flow 9s linear infinite;
  }
}

@keyframes pc-flow {
  to {
    stroke-dashoffset: -140;
  }
}

/* ---------- 准备清单：不对称两栏 ---------- */
.page-contact .prep-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .prep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-contact .prep-index .section-title {
  margin: 8px 0 18px;
  line-height: 1.3;
}

.page-contact .prep-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-contact .prep-index__list li {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .prep-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-contact .prep-index__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--metal);
}

.page-contact .prep-index__list a:hover,
.page-contact .prep-index__list a:focus-visible {
  color: var(--orbit);
  padding-left: 6px;
}

.page-contact .prep-index__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .prep-index__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-contact .prep-body {
  display: grid;
  gap: 0;
}

.page-contact .req {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.page-contact .req__no {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-contact .req__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--deep);
  margin: 0 0 8px;
}

.page-contact .req__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-mid);
  margin: 0 0 14px;
}

.page-contact .req__items {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .req__items li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
}

.page-contact .req__items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--paper);
  border: 1px solid var(--cyan);
}

/* ---------- 资料与批次 ---------- */
.page-contact .dossier-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .dossier {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: center;
}

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

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

.page-contact .dossier__text .section-title {
  margin: 8px 0 14px;
}

.page-contact .dossier__text p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mid);
  margin: 0 0 16px;
  max-width: 60ch;
}

.page-contact .dossier__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .dossier__points li {
  position: relative;
  padding: 12px 14px 12px 34px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
  background: var(--mist);
  border-left: 2px solid var(--green);
}

.page-contact .dossier__points li::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 1.35em;
  width: 8px;
  height: 8px;
  background: var(--green);
}

.page-contact .dossier__points .data {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
  letter-spacing: 0.02em;
}

/* ---------- 用途边界 ---------- */
.page-contact .bound-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .bound-section .section-title {
  margin: 8px 0 22px;
}

.page-contact .bound-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .bound-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .bound-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 32px 18px 0;
  position: relative;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--deep);
  transition: color 0.2s var(--ease);
}

.page-contact .bound-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .bound-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-contact .bound-item[open] summary::after {
  content: "–";
  color: var(--orange);
}

.page-contact .bound-item summary:hover,
.page-contact .bound-item summary:focus-visible {
  color: var(--orbit);
}

.page-contact .bound-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .bound-item__body {
  padding: 0 0 20px;
}

.page-contact .bound-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-mid);
  max-width: 66ch;
}

.page-contact .bound-item__body .data {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--deep);
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

.page-contact .bound-item__body a {
  color: var(--orbit);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color 0.2s var(--ease);
}

.page-contact .bound-item__body a:hover,
.page-contact .bound-item__body a:focus-visible {
  border-bottom-color: var(--orange);
}

/* ---------- 处理顺序：横向轨道 ---------- */
.page-contact .order-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .order-section .section-title {
  margin: 8px 0 24px;
}

.page-contact .order-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  counter-reset: none;
}

.page-contact .order-step {
  position: relative;
  padding: 20px 0 20px 26px;
  border-left: 2px solid var(--line-soft);
}

.page-contact .order-step:last-child {
  border-left-color: var(--orange);
}

.page-contact .order-step::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 26px;
  width: 10px;
  height: 10px;
  background: var(--deep);
  border: 2px solid var(--cyan);
  border-radius: 50%;
}

.page-contact .order-step:last-child::before {
  border-color: var(--orange);
}

.page-contact .order-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--metal);
  margin-bottom: 6px;
}

.page-contact .order-step__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
  margin: 0 0 8px;
}

.page-contact .order-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-mid);
  max-width: 40ch;
}

/* ---------- 联系地址 ---------- */
.page-contact .address-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .address-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .address-main .section-title {
  margin: 8px 0 16px;
}

.page-contact .address-value {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--deep);
  margin: 0 0 14px;
  padding: 14px 16px;
  background: var(--paper);
  border-left: 3px solid var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .address-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-soft);
  max-width: 60ch;
}

.page-contact .address-side {
  padding: 20px;
  background: var(--mist);
  border: 1px solid var(--line-soft);
}

.page-contact .address-side__title {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--deep);
  margin: 0 0 12px;
}

.page-contact .address-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .address-side__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
}

.page-contact .address-side__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--metal);
}

/* ---------- 尾部路径 ---------- */
.page-contact .next-section {
  border-top: 1px solid var(--line-soft);
}

.page-contact .next-section .section-title {
  margin: 0 0 20px;
}

.page-contact .next-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .next-rail li {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .next-rail a {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 24px 16px 0;
  position: relative;
  text-decoration: none;
  transition: padding-left 0.22s var(--ease);
}

.page-contact .next-rail a::after {
  content: "→";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--metal);
  transition: color 0.22s var(--ease), right 0.22s var(--ease);
}

.page-contact .next-rail a:hover,
.page-contact .next-rail a:focus-visible {
  padding-left: 8px;
}

.page-contact .next-rail a:hover::after,
.page-contact .next-rail a:focus-visible::after {
  color: var(--cyan);
  right: 0;
}

.page-contact .next-rail a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .next-rail__k {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
}

.page-contact .next-rail__v {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-soft);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-row {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-contact .req {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 0 26px;
    padding: 28px 0;
  }

  .page-contact .req__no {
    font-size: 26px;
  }

  .page-contact .order-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 30px;
  }

  .page-contact .order-step {
    padding-left: 22px;
  }

  .page-contact .order-step:nth-child(2) {
    border-left-color: var(--metal);
  }

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

  .page-contact .next-rail li:nth-child(odd) a {
    padding-right: 24px;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 54px;
    align-items: stretch;
    padding-top: 30px;
    padding-bottom: 70px;
  }

  .page-contact .flow-panel {
    min-height: 100%;
  }

  .page-contact .prep-grid {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .prep-index {
    position: sticky;
    top: calc(var(--rail-top-h) + 28px);
  }

  .page-contact .dossier {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 46px;
  }

  .page-contact .order-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 26px;
  }

  .page-contact .order-step {
    padding: 24px 18px 24px 0;
    border-left: none;
    border-top: 2px solid var(--line-soft);
  }

  .page-contact .order-step:last-child {
    border-top-color: var(--orange);
  }

  .page-contact .order-step::before {
    left: 0;
    top: -6px;
  }

  .page-contact .address-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 46px;
    align-items: start;
  }

  .page-contact .next-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 26px;
  }

  .page-contact .next-rail a {
    padding-right: 20px;
  }

  .page-contact .next-rail a::after {
    position: static;
    transform: none;
    display: block;
    margin-top: 6px;
  }
}