.page-contact {
  --pc-cut: 18px;
  --pc-gap: 16px;
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  padding-top: 40px;
  padding-bottom: 36px;
}

.page-contact .contact-intro .eyebrow {
  margin: 22px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.page-contact h1 {
  margin: 14px 0 0;
  max-width: 17em;
  font-family: var(--sans);
  font-size: clamp(2.05rem, 5.4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-contact .contact-intro .lede {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 1.03rem;
  line-height: 1.8;
  color: #33434f;
}

.page-contact .contact-intro::after {
  content: "";
  display: block;
  width: 84px;
  height: 3px;
  margin-top: 26px;
  background: linear-gradient(90deg, var(--ice) 0 62%, var(--amber) 62% 100%);
}

/* ---------- 通用区块节奏 ---------- */
.page-contact .section {
  padding-top: 52px;
  padding-bottom: 52px;
}

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

.page-contact .section-head .prose {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 0.98rem;
  line-height: 1.8;
  color: #3b4a56;
}

.page-contact .panel-note {
  margin: 16px 0 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--grey);
}

.page-contact .panel-note a,
.page-contact .contact-legal a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .panel-note a:hover,
.page-contact .contact-legal a:hover {
  color: var(--amber);
}

/* ---------- 四类诉求：左选右看 ---------- */
.page-contact .contact-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
  margin-top: 28px;
}

.page-contact .contact-split__pick {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-contact .choice {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  width: 100%;
  margin: 0;
  padding: 15px 18px;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 0;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - var(--pc-cut)) 0, 100% var(--pc-cut), 100% 100%, 0 100%);
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

.page-contact .choice__idx {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-contact .choice__main {
  display: block;
}

.page-contact .choice__title {
  display: block;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
}

.page-contact .choice__hint {
  display: block;
  margin-top: 6px;
  font-size: 0.83rem;
  line-height: 1.6;
  color: var(--grey);
}

.page-contact .choice[aria-selected="true"] {
  background: var(--ice);
  border-color: var(--ice);
  color: var(--mist);
}

.page-contact .choice[aria-selected="true"] .choice__hint {
  color: rgba(242, 246, 249, 0.8);
}

.page-contact .choice:hover {
  border-color: var(--amber);
}

.page-contact .choice:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-contact .contact-split__panel {
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--pc-cut)), calc(100% - var(--pc-cut)) 100%, 0 100%);
}

.page-contact .contact-shot {
  margin: 0 0 20px;
}

.page-contact .contact-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 220px;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-contact .contact-shot .media-caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--grey);
}

.page-contact .contact-tabs .tab-panel {
  display: block;
}

.page-contact .contact-tabs:has(.choice[aria-selected="true"]) .tab-panel {
  display: none;
}

.page-contact .contact-tabs:has(.choice[data-tab-button="route"][aria-selected="true"]) [data-tab-panel="route"],
.page-contact .contact-tabs:has(.choice[data-tab-button="data"][aria-selected="true"]) [data-tab-panel="data"],
.page-contact .contact-tabs:has(.choice[data-tab-button="device"][aria-selected="true"]) [data-tab-panel="device"],
.page-contact .contact-tabs:has(.choice[data-tab-button="partner"][aria-selected="true"]) [data-tab-panel="partner"] {
  display: block;
}

.page-contact .tab-panel + .tab-panel {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
}

.page-contact .panel-title {
  margin: 0 0 10px;
  font-size: 1.22rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ice);
}

.page-contact .tab-panel .prose {
  margin: 0;
  max-width: 40em;
  font-size: 0.94rem;
  line-height: 1.8;
  color: #3b4a56;
}

.page-contact .need-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .need-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.91rem;
  line-height: 1.7;
  color: #2f3f4c;
}

.page-contact .need-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--aurora);
  transform: rotate(45deg);
}

.page-contact .link-arrow {
  color: var(--ice);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .link-arrow:hover {
  color: var(--amber);
}

/* ---------- 联系方式通栏 ---------- */
.page-contact .contact-band {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--mist);
}

.page-contact .contact-band__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .contact-band__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  filter: saturate(0.45) contrast(1.1);
}

.page-contact .contact-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(115deg, rgba(14, 22, 32, 0.95) 0%, rgba(20, 43, 69, 0.82) 62%, rgba(30, 92, 140, 0.62) 100%);
}

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

.page-contact .contact-band .section-title {
  margin: 0;
  color: var(--paper);
}

.page-contact .band-graph {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 0 22px;
  opacity: 0.9;
}

.page-contact .band-grid {
  display: grid;
  gap: 22px;
  margin-top: 30px;
}

.page-contact .band-cell__label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--aurora);
}

.page-contact .band-cell__value {
  margin: 0 0 10px;
  font-size: clamp(1.02rem, 2.6vw, 1.42rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .band-cell__note {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(242, 246, 249, 0.74);
}

.page-contact .band-meta {
  margin: 34px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.03em;
  color: rgba(124, 138, 150, 0.95);
}

/* ---------- 提交清单 ---------- */
.page-contact .check-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .check-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-left: 3px solid var(--aurora);
}

.page-contact .check-box {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  color: var(--ice);
  border: 2px solid var(--ice);
  border-radius: 0;
}

.page-contact .check-box svg {
  width: 14px;
  height: 14px;
}

.page-contact .check-title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .check-item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: #46545f;
}

/* ---------- 后续节奏 ---------- */
.page-contact .flow-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-contact .flow-item {
  position: relative;
  padding: 0 0 26px 32px;
  border-left: 1px solid var(--line);
}

.page-contact .flow-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-contact .flow-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(242, 107, 33, 0.16);
}

.page-contact .flow-num {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice);
}

.page-contact .flow-item h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .flow-item p {
  margin: 0;
  max-width: 40em;
  font-size: 0.92rem;
  line-height: 1.78;
  color: #3b4a56;
}

.page-contact .contact-legal {
  margin: 34px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 700px) {
  .page-contact .contact-intro {
    padding-top: 52px;
    padding-bottom: 44px;
  }

  .page-contact .contact-shot img {
    height: 280px;
  }

  .page-contact .band-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-contact .band-cell {
    padding: 0 22px;
    border-left: 1px solid var(--line-light);
  }

  .page-contact .band-cell:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .band-meta {
    text-align: right;
  }

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

/* ---------- 桌面：左右对开 ---------- */
@media (min-width: 980px) {
  .page-contact .section {
    padding-top: 78px;
    padding-bottom: 78px;
  }

  .page-contact .contact-intro {
    padding-top: 64px;
    padding-bottom: 52px;
  }

  .page-contact .contact-split {
    grid-template-columns: minmax(280px, 4fr) 7fr;
    gap: 26px;
    align-items: start;
  }

  .page-contact .contact-split__pick {
    position: sticky;
    top: 24px;
  }

  .page-contact .contact-split__panel {
    padding: 26px 28px 30px;
  }

  .page-contact .contact-shot img {
    height: 320px;
  }

  .page-contact .contact-band__inner {
    padding-top: 8px;
  }

  .page-contact .band-graph {
    margin-bottom: 26px;
  }
}