.page-contact {
  --contact-surface: rgba(255, 255, 255, 0.045);
  --contact-dash: rgba(30, 42, 74, 0.95);
  padding-bottom: 2.5rem;
}

.page-contact .breadcrumb {
  margin: 1.1rem 0 0.4rem;
}

.page-contact .section {
  padding-block: clamp(1.9rem, 5vw, 3.2rem);
}

.page-contact h1,
.page-contact h2,
.page-contact h3 {
  font-family: var(--font-heading);
  color: var(--c-paper);
}

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

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-block: 0.75rem clamp(1.8rem, 5vw, 3rem);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 1.5rem;
}

.page-contact .contact-hero__main {
  position: relative;
  overflow: hidden;
  padding: 1.9rem 1.2rem 1.6rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-cut);
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(61, 245, 255, 0.11), transparent 60%),
    linear-gradient(180deg, rgba(17, 27, 58, 0.72), rgba(11, 16, 38, 0.9));
}

.page-contact .contact-hero__main::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 9px;
  background: repeating-linear-gradient(90deg, var(--c-line) 0 1px, transparent 1px 38px);
}

.page-contact .contact-hero h1 {
  margin: 0.45rem 0 1rem;
  font-size: clamp(2rem, 7.2vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-contact .contact-hero .lede {
  max-width: 48ch;
  margin: 0;
  color: var(--c-paper-soft);
  font-size: var(--step-body);
  line-height: 1.78;
}

.page-contact .contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__tags li {
  position: relative;
  padding-left: 0.95rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-contact .contact-hero__tags li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--c-cyan);
}

.page-contact .contact-card {
  padding: 1.4rem 1.2rem 1.5rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-organic);
  background: var(--c-glass);
  box-shadow: var(--shadow-lift);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(61, 245, 255, 0.5);
}

.page-contact .contact-card__kicker {
  margin: 0 0 0.55rem;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-fog);
}

.page-contact .contact-card__mail {
  margin: 0 0 1.1rem;
  font-size: clamp(0.9rem, 2.7vw, 1.05rem);
  color: var(--c-cyan);
  word-break: break-all;
}

.page-contact .contact-card__rows {
  display: grid;
  gap: 0.55rem;
  margin: 0 0 1.25rem;
}

.page-contact .contact-card__row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--contact-dash);
}

.page-contact .contact-card__row dt {
  margin: 0;
  font-size: 0.85rem;
  color: var(--c-fog);
}

.page-contact .contact-card__row dd {
  margin: 0;
  font-size: 0.9rem;
  text-align: right;
  color: var(--c-paper);
}

.page-contact .contact-card__cta {
  display: flex;
  justify-content: center;
  width: 100%;
}

.page-contact .contact-card__hint {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.9rem 0 0;
  font-size: 0.8rem;
  color: var(--c-fog);
}

/* ---------- 合作方向 ---------- */
.page-contact .contact-directions__head,
.page-contact .contact-channels__head {
  margin-bottom: 1.7rem;
}

.page-contact .coop-layout {
  display: grid;
  gap: 1.7rem;
}

.page-contact .coop-aside {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.page-contact .coop-aside__note {
  margin: 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--c-orange);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-fog);
}

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

.page-contact .coop-tab__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.2rem;
  margin-bottom: 1.2rem;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .coop-tab__label {
  padding: 0.65rem 0.85rem;
  border-bottom: 2px solid transparent;
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--c-fog);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-contact .coop-tab__label:hover {
  color: var(--c-paper);
}

.page-contact .coop-panel {
  display: none;
  padding: 1.25rem 1.1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-cut);
  background: var(--contact-surface);
}

.page-contact .coop-panel__title {
  margin: 0 0 0.7rem;
  font-size: 1.32rem;
  letter-spacing: 0.02em;
}

.page-contact .coop-panel p {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--c-paper-soft);
}

.page-contact .coop-panel__facts {
  display: grid;
  gap: 0.45rem;
  margin: 0 0 1.05rem;
  padding: 0;
  list-style: none;
}

.page-contact .coop-panel__facts li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.89rem;
  line-height: 1.62;
  color: var(--c-fog);
}

.page-contact .coop-panel__facts li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--c-cyan);
}

.page-contact .coop-panel__link {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.page-contact #coop-1:checked ~ .coop-panels .coop-panel--1,
.page-contact #coop-2:checked ~ .coop-panels .coop-panel--2,
.page-contact #coop-3:checked ~ .coop-panels .coop-panel--3,
.page-contact #coop-4:checked ~ .coop-panels .coop-panel--4 {
  display: block;
}

.page-contact #coop-1:checked ~ .coop-tab__bar .coop-tab__label[for="coop-1"],
.page-contact #coop-2:checked ~ .coop-tab__bar .coop-tab__label[for="coop-2"],
.page-contact #coop-3:checked ~ .coop-tab__bar .coop-tab__label[for="coop-3"],
.page-contact #coop-4:checked ~ .coop-tab__bar .coop-tab__label[for="coop-4"] {
  color: var(--c-paper);
  border-bottom-color: var(--c-cyan);
}

.page-contact #coop-1:focus-visible ~ .coop-tab__bar .coop-tab__label[for="coop-1"],
.page-contact #coop-2:focus-visible ~ .coop-tab__bar .coop-tab__label[for="coop-2"],
.page-contact #coop-3:focus-visible ~ .coop-tab__bar .coop-tab__label[for="coop-3"],
.page-contact #coop-4:focus-visible ~ .coop-tab__bar .coop-tab__label[for="coop-4"] {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

/* ---------- 联系渠道 ---------- */
.page-contact .contact-channels__grid {
  display: grid;
  gap: 1.7rem;
  align-items: start;
}

.page-contact .contact-channels__list {
  display: grid;
}

.page-contact .channel {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .channel:first-child {
  padding-top: 0;
}

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

.page-contact .channel__label {
  margin: 0 0 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-fog);
}

.page-contact .channel__value {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3vw, 1.15rem);
  line-height: 1.5;
  color: var(--c-paper);
  word-break: break-all;
}

.page-contact .channel--primary .channel__value {
  color: var(--c-cyan);
}

.page-contact .channel__value--text {
  font-family: var(--font-body);
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.page-contact .channel__note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-fog);
}

.page-contact .contact-channels__media {
  border-radius: var(--radius-organic);
  overflow: hidden;
}

/* ---------- 问题提交指引 ---------- */
.page-contact .contact-submit__grid {
  display: grid;
  gap: 1.7rem;
}

.page-contact .contact-submit__intro p {
  margin: 0 0 1rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--c-paper-soft);
}

.page-contact .contact-submit__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
}

.page-contact .contact-submit__links a {
  font-size: 0.92rem;
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-contact .contact-submit__check-title {
  margin: 0 0 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-fog);
}

.page-contact .checklist {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-cut);
  background: var(--contact-surface);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--c-paper-soft);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-contact .checklist__item:hover {
  border-color: rgba(61, 245, 255, 0.4);
}

.page-contact .checklist__box {
  position: relative;
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin: 0.2rem 0 0;
  border: 1px solid var(--c-fog);
  border-radius: 0.22rem;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.page-contact .checklist__box:checked {
  border-color: var(--c-grass);
  background: rgba(47, 191, 113, 0.2);
}

.page-contact .checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 0.32rem;
  top: 0.08rem;
  width: 0.4rem;
  height: 0.72rem;
  border-right: 2px solid var(--c-grass);
  border-bottom: 2px solid var(--c-grass);
  transform: rotate(40deg);
}

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

/* ---------- 响应流程 ---------- */
.page-contact .contact-flow__grid {
  display: grid;
  gap: 1.9rem;
}

.page-contact .contact-flow__rail p {
  margin: 0 0 1.1rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--c-paper-soft);
}

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

.page-contact .flow-step {
  position: relative;
  padding: 0 0 1.8rem 3rem;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15rem;
  bottom: 0;
  width: 1px;
  background: var(--c-line);
}

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

.page-contact .flow-step:last-child::before {
  bottom: auto;
  height: 1.9rem;
}

.page-contact .flow-step__num {
  position: absolute;
  left: -0.92rem;
  top: -0.1rem;
  display: grid;
  place-items: center;
  width: 1.85rem;
  height: 1.85rem;
  border: 1px solid var(--c-line);
  border-radius: 0.3rem;
  background: var(--c-midnight);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-cyan);
}

.page-contact .flow-step__title {
  margin: 0 0 0.4rem;
  font-size: 1.12rem;
  letter-spacing: 0.04em;
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--c-fog);
}

/* ---------- 收尾 ---------- */
.page-contact .contact-close {
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-contact .contact-close__inner {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-organic);
  background:
    linear-gradient(140deg, rgba(61, 245, 255, 0.1), rgba(255, 107, 53, 0.07) 62%, rgba(11, 16, 38, 0));
  box-shadow: var(--shadow-lift);
}

.page-contact .contact-close__lead {
  max-width: 52ch;
  margin: 0 0 1.2rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--c-paper-soft);
}

.page-contact .contact-close__mail {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3.4vw, 1.85rem);
  line-height: 1.35;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-contact .contact-close__note {
  margin: 0 0 1.4rem;
  font-size: 0.9rem;
  color: var(--c-fog);
}

.page-contact .contact-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 锚点偏移 ---------- */
.page-contact #directions,
.page-contact #channels,
.page-contact #submit,
.page-contact #flow {
  scroll-margin-top: 5.5rem;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 2rem;
  }

  .page-contact .coop-layout {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 2rem;
  }

  .page-contact .contact-channels__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.25rem;
  }

  .page-contact .contact-submit__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 2.5rem;
  }

  .page-contact .contact-flow__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 2.75rem;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-hero__main {
    padding: 2.5rem 2.25rem 2.25rem;
  }

  .page-contact .contact-card {
    padding: 1.7rem 1.5rem 1.7rem;
  }

  .page-contact .coop-panel {
    padding: 1.5rem 1.45rem;
  }

  .page-contact .contact-flow__rail {
    position: sticky;
    top: 6rem;
    align-self: start;
  }

  .page-contact .contact-channels__media {
    position: sticky;
    top: 6rem;
  }
}