.page-contact {
  --cc-side: 330px;
  --cc-gap: clamp(1.5rem, 4vw, 3.5rem);
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 140% at 90% -10%, rgba(110, 27, 27, 0.6) 0%, rgba(110, 27, 27, 0) 58%),
    radial-gradient(110% 130% at -5% 110%, rgba(12, 38, 36, 0.92) 0%, rgba(12, 38, 36, 0) 62%),
    var(--ink);
  border-bottom: 2px solid var(--line);
  overflow: hidden;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 62rem;
}

.page-contact .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--stone);
  margin-bottom: 1.4rem;
}

.page-contact .breadcrumbs a {
  color: var(--cyan);
}

.page-contact .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.9rem;
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.6vw, 3.75rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--ivory);
  margin: 0 0 1.1rem;
  max-width: 22ch;
}

.page-contact .contact-hero .lede {
  max-width: 46rem;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.85;
  color: rgba(242, 239, 233, 0.86);
  margin: 0 0 1.5rem;
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.page-contact .contact-hero__ring {
  position: absolute;
  right: -4rem;
  top: 46%;
  width: clamp(15rem, 30vw, 27rem);
  height: auto;
  transform: translateY(-50%);
  opacity: 0.55;
  pointer-events: none;
  animation: cc-spin 88s linear infinite;
}

@keyframes cc-spin {
  from { transform: translateY(-50%) rotate(0deg); }
  to   { transform: translateY(-50%) rotate(360deg); }
}

@media (max-width: 899px) {
  .page-contact .contact-hero__ring { display: none; }
}

/* ---------- 主体对照布局 ---------- */
.page-contact .contact-deck {
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(3rem, 7vw, 5.5rem);
  background:
    linear-gradient(180deg, rgba(12, 38, 36, 0.35) 0%, rgba(10, 11, 14, 0) 26rem),
    var(--ink);
}

.page-contact .contact-deck__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--cc-gap);
}

@media (min-width: 1000px) {
  .page-contact .contact-deck__grid {
    grid-template-columns: var(--cc-side) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧固定联系栏 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 0.7rem;
  align-content: start;
  padding: 1.5rem 1.3rem;
  border: 2px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2) 0%, rgba(12, 38, 36, 0.5) 100%);
  box-shadow: var(--shadow);
}

@media (min-width: 1000px) {
  .page-contact .contact-rail {
    position: sticky;
    top: 1.5rem;
  }
}

.page-contact .contact-rail__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin: 0;
  color: var(--ivory);
}

.page-contact .contact-rail__title::before {
  content: "";
  display: block;
  width: 2.5rem;
  height: 4px;
  margin-bottom: 0.75rem;
  background: var(--cinnabar);
}

.page-contact .contact-rail__note {
  margin: 0 0 0.4rem;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--stone);
}

.page-contact .contact-item {
  position: relative;
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.85rem 0.95rem;
  background: rgba(10, 11, 14, 0.72);
  border: 2px solid var(--line-soft);
  border-left: 6px solid var(--cinnabar);
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition:
    border-color 0.25s var(--ease),
    background-color 0.25s var(--ease),
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.page-contact button.contact-item:hover,
.page-contact button.contact-item:focus-visible {
  border-left-color: var(--gold);
  background: rgba(217, 164, 65, 0.08);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-sm);
  outline: none;
}

.page-contact .contact-item--static {
  cursor: default;
  border-left-color: var(--gold);
}

.page-contact .contact-item__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 0.3rem;
}

.page-contact .contact-item__val {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.94rem;
  line-height: 1.5;
  color: var(--ivory);
  word-break: break-word;
}

.page-contact .contact-item__val--sm {
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(242, 239, 233, 0.82);
}

.page-contact .contact-item__hint {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-contact .contact-item__hint::after {
  content: "点击复制";
}

.page-contact .contact-item[data-copy-state="done"] {
  border-left-color: var(--cyan);
}

.page-contact .contact-item[data-copy-state="done"] .contact-item__hint {
  color: var(--cyan);
}

.page-contact .contact-item[data-copy-state="done"] .contact-item__hint::after {
  content: "已复制";
}

.page-contact .contact-rail__foot {
  margin: 0.45rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  font-size: 0.82rem;
  line-height: 1.72;
  color: var(--stone);
}

.page-contact .contact-rail__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 右侧内容流 ---------- */
.page-contact .contact-block {
  padding-bottom: clamp(2.25rem, 5vw, 3.75rem);
  margin-bottom: clamp(2.25rem, 5vw, 3.75rem);
  border-bottom: 2px solid var(--line-soft);
}

.page-contact .contact-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-contact .chapter-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.3vw, 2.1rem);
  line-height: 1.26;
  color: var(--ivory);
}

.page-contact .contact-block .chapter-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
}

.page-contact .contact-block .chapter-kicker {
  max-width: 46rem;
  margin: 0 0 1.7rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 合作方向标签页 ---------- */
.page-contact .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 0.85rem;
  margin-bottom: 1.4rem;
  border-bottom: 2px solid var(--line);
}

.page-contact .tabs__tab {
  padding: 0.62rem 1.05rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--stone);
  background: transparent;
  border: 2px solid var(--line);
  cursor: pointer;
  transition:
    color 0.22s var(--ease),
    background-color 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.page-contact .tabs__tab:hover {
  color: var(--gold-light);
  border-color: var(--gold);
}

.page-contact .tabs__tab[aria-selected="true"] {
  color: var(--ivory);
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-contact .tabs__panel {
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 2px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
}

.page-contact .tabs__panel[hidden] {
  display: none;
}

.page-contact .contact-panel__lede {
  margin: 0 0 1.4rem;
  padding-left: 0.85rem;
  border-left: 4px solid var(--jade);
  font-size: 0.96rem;
  line-height: 1.82;
  color: rgba(242, 239, 233, 0.88);
}

.page-contact .contact-tabgrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

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

.page-contact .contact-tabgrid__key {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .contact-tabgrid__val {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(242, 239, 233, 0.85);
}

/* ---------- 四步流程 ---------- */
.page-contact .contact-steps {
  position: relative;
  list-style: none;
  margin: 0 0 2.25rem;
  padding: 0 0 0 3.4rem;
}

.page-contact .contact-steps::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0.7rem;
  bottom: 1.6rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cinnabar) 0%, var(--gold) 58%, var(--jade) 100%);
}

.page-contact .contact-step {
  position: relative;
  padding-bottom: 1.9rem;
}

.page-contact .contact-step:last-child {
  padding-bottom: 0;
}

.page-contact .contact-step__node {
  position: absolute;
  left: -3.4rem;
  top: -0.15rem;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold);
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-sm);
}

.page-contact .contact-step__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ivory);
}

.page-contact .contact-step__text {
  margin: 0 0 0.6rem;
  font-size: 0.94rem;
  line-height: 1.82;
  color: rgba(242, 239, 233, 0.82);
}

.page-contact .contact-step__out {
  display: inline-block;
  margin: 0;
  padding-left: 0.65rem;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

/* ---------- 资料清单 ---------- */
.page-contact .contact-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

@media (min-width: 760px) {
  .page-contact .contact-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-contact .contact-check {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  border: 2px solid var(--line-soft);
  background: var(--ink-2);
  cursor: pointer;
  transition:
    border-color 0.22s var(--ease),
    background-color 0.22s var(--ease);
}

.page-contact .contact-check:hover {
  border-color: var(--line);
  background: rgba(217, 164, 65, 0.05);
}

.page-contact .contact-check input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .contact-check__box {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 1.3rem;
  height: 1.3rem;
  margin-top: 0.18rem;
  border: 2px solid var(--gold);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1;
  color: var(--ivory);
  transition:
    background-color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.page-contact .contact-check input:checked + .contact-check__box {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-contact .contact-check input:checked + .contact-check__box::after {
  content: "✓";
}

.page-contact .contact-check input:focus-visible + .contact-check__box {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .contact-check__name {
  display: block;
  margin-bottom: 0.22rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ivory);
}

.page-contact .contact-check__desc {
  display: block;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 合作问答 ---------- */
.page-contact .accordion {
  display: grid;
  gap: 0.65rem;
}

.page-contact .accordion__item {
  border: 2px solid var(--line-soft);
  background: var(--ink-2);
  transition: border-color 0.22s var(--ease);
}

.page-contact .accordion__item:hover {
  border-color: var(--line);
}

.page-contact .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 1rem 1.1rem;
  background: transparent;
  border: 0;
  color: var(--ivory);
  font-family: var(--font-body);
  font-size: 0.97rem;
  text-align: left;
  cursor: pointer;
}

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

.page-contact .accordion__index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-contact .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 0.85rem;
  height: 0.85rem;
  margin-left: auto;
}

.page-contact .accordion__icon::before,
.page-contact .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--cinnabar);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.page-contact .accordion__icon::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-contact .accordion__icon::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-contact .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.page-contact .accordion__panel-inner {
  padding: 0 1.1rem 1.15rem 3.15rem;
  font-size: 0.93rem;
  line-height: 1.85;
  color: rgba(242, 239, 233, 0.82);
}

.page-contact .accordion__panel-inner a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 服务地区与备案 ---------- */
.page-contact .contact-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 760px) {
  .page-contact .contact-region {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

.page-contact .contact-facts {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--jade-deep);
  box-shadow: var(--shadow-sm);
}

.page-contact .contact-facts__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-facts__row:last-child {
  border-bottom: 0;
}

.page-contact .contact-facts dt {
  flex: 0 0 6.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-contact .contact-facts dd {
  margin: 0;
  flex: 1 1 8rem;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ivory);
}

.page-contact .contact-region__tail {
  margin: 1.6rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--stone);
}

.page-contact .contact-region__tail a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图片占位约束 ---------- */
.page-contact .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-hero__ring {
    animation: none;
  }

  .page-contact .contact-item,
  .page-contact .tabs__tab,
  .page-contact .contact-check,
  .page-contact .accordion__icon::before,
  .page-contact .accordion__icon::after {
    transition: none;
  }

  .page-contact button.contact-item:hover,
  .page-contact button.contact-item:focus-visible {
    transform: none;
  }
}