.page-contact {
  --coop-rail-w: 264px;
  --coop-gap: clamp(28px, 5vw, 56px);
  display: block;
  background: var(--ink-deep);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-contact .coop-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 34px) 0 clamp(44px, 7vw, 84px);
  background:
    radial-gradient(112% 82% at 88% -18%, rgba(255, 210, 74, .16), transparent 62%),
    linear-gradient(158deg, var(--ink-night) 0%, var(--ink-deep) 66%);
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(234, 242, 238, .05) 0 1px, transparent 1px 92px);
  pointer-events: none;
}

.page-contact .coop-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-contact .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--whistle);
}

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

.page-contact .coop-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-contact .coop-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 58px);
  line-height: 1.12;
  letter-spacing: .01em;
  color: var(--text);
}

.page-contact .coop-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(234, 242, 238, .84);
}

.page-contact .coop-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .coop-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-dim);
}

.page-contact .coop-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-contact .coop-hero__facts .mono {
  color: var(--whistle);
  font-size: 15px;
}

.page-contact .coop-hero__aside {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--whistle);
  background: rgba(27, 47, 58, .62);
}

.page-contact .coop-hero__aside-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--whistle);
}

.page-contact .coop-hero__dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-contact .coop-hero__dl dt {
  margin: 0 0 5px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-dim);
}

.page-contact .coop-hero__dl dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .coop-hero__dl dd a {
  color: var(--whistle);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 210, 74, .45);
}

.page-contact .coop-hero__dl dd a:hover,
.page-contact .coop-hero__dl dd a:focus-visible {
  border-bottom-color: var(--whistle);
}

.page-contact .coop-hero__aside-note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .coop-mail {
  overflow-wrap: anywhere;
}

.page-contact .coop-nowrap {
  white-space: nowrap;
}

/* ---------- 主布局 ---------- */
.page-contact .coop-layout {
  display: grid;
  gap: var(--coop-gap);
  padding-block: clamp(40px, 6vw, 76px);
}

.page-contact .coop-rail {
  border-top: 2px solid var(--whistle);
  padding-top: 16px;
}

.page-contact .coop-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-contact .coop-rail__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-contact .coop-rail__list li {
  flex: 0 0 auto;
}

.page-contact .coop-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: rgba(12, 28, 51, .55);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.page-contact .coop-rail__list a .mono {
  color: var(--whistle);
  font-size: 13px;
}

.page-contact .coop-rail__list a:hover,
.page-contact .coop-rail__list a:focus-visible {
  border-color: var(--whistle);
  color: var(--whistle);
}

.page-contact .coop-rail__box {
  margin-top: 20px;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  background: rgba(27, 47, 58, .42);
}

.page-contact .coop-rail__box-title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-dim);
}

.page-contact .coop-rail__box-time {
  margin: 0;
  color: var(--whistle);
  font-size: 15px;
}

.page-contact .coop-rail__box-note {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-contact .coop-main > .section {
  padding-block: 0;
}

.page-contact .coop-main > .section + .section {
  margin-top: clamp(52px, 8vw, 96px);
}

.page-contact .coop-intro h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  color: var(--text);
}

.page-contact .coop-intro > p {
  margin: 14px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-contact .coop-intro > p a {
  color: var(--whistle);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 210, 74, .5);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-directions {
  display: grid;
  gap: 18px;
  margin-top: 32px;
}

.page-contact .coop-dir {
  position: relative;
  padding: 28px 22px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(27, 47, 58, .9), rgba(8, 32, 28, .92));
}

.page-contact .coop-dir::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--whistle);
}

.page-contact .coop-dir--content::before {
  background: var(--turf);
}

.page-contact .coop-dir--channel::before {
  background: var(--score-red);
}

.page-contact .coop-dir__index {
  margin: 0;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.page-contact .coop-dir h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  color: var(--text);
}

.page-contact .coop-dir > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-contact .coop-dir__list {
  margin: 18px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px;
}

.page-contact .coop-dir__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .coop-dir__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--whistle);
}

.page-contact .coop-dir--content .coop-dir__list li::before {
  background: var(--turf);
}

.page-contact .coop-dir--channel .coop-dir__list li::before {
  background: var(--score-red);
}

.page-contact .coop-figure {
  margin: 34px 0 0;
  aspect-ratio: 3 / 2;
}

.page-contact .coop-figure--narrow {
  aspect-ratio: 21 / 9;
}

.page-contact .coop-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 三步路径 ---------- */
.page-contact .coop-steps {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-contact .coop-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 24px 20px;
  border: 1px solid var(--line-soft);
  background: rgba(12, 28, 51, .55);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-contact .coop-step:target,
.page-contact .coop-step:hover {
  border-color: var(--whistle);
  background: rgba(27, 47, 58, .82);
}

.page-contact .coop-step__num {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 600;
  line-height: 1;
  color: var(--whistle);
}

.page-contact .coop-step__body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  color: var(--text);
}

.page-contact .coop-step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-contact .coop-step__hint {
  margin-top: 12px !important;
  font-size: 13.5px !important;
}

.page-contact .coop-step__hint a {
  color: var(--whistle);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 210, 74, .5);
}

.page-contact .coop-step__hint a:hover,
.page-contact .coop-step__hint a:focus-visible {
  border-bottom-color: var(--whistle);
}

/* ---------- 材料清单 ---------- */
.page-contact .coop-checklist {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .coop-check {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  background: rgba(27, 47, 58, .45);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-contact .coop-check:hover {
  border-color: var(--line);
  background: rgba(27, 47, 58, .7);
}

.page-contact .coop-check input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin: 3px 0 0;
  border: 2px solid var(--line);
  background: rgba(8, 32, 28, .7);
  cursor: pointer;
}

.page-contact .coop-check input:checked {
  background: var(--whistle);
  border-color: var(--whistle);
}

.page-contact .coop-check input:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 7px;
  height: 12px;
  border-right: 2px solid var(--ink-deep);
  border-bottom: 2px solid var(--ink-deep);
  transform: rotate(40deg);
}

.page-contact .coop-check input:focus-visible {
  outline: 2px solid var(--whistle);
  outline-offset: 3px;
}

.page-contact .coop-check label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.page-contact .coop-check strong {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
}

.page-contact .coop-check span {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 联系入口 ---------- */
.page-contact .coop-contact-grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-contact .coop-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(12, 28, 51, .85), rgba(8, 32, 28, .9));
}

.page-contact .coop-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-contact .coop-card__value {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.5;
  color: var(--whistle);
}

.page-contact .coop-card__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 210, 74, .45);
}

.page-contact .coop-card__value a:hover,
.page-contact .coop-card__value a:focus-visible {
  border-bottom-color: var(--whistle);
}

.page-contact .coop-card__value--nowrap {
  white-space: nowrap;
}

.page-contact .coop-card__value--text {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text);
  font-family: var(--font-body);
}

.page-contact .coop-card__use {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .coop-contact-note {
  margin: 20px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .coop-contact-note a {
  color: var(--whistle);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 210, 74, .5);
}

/* ---------- 回复安排 ---------- */
.page-contact .coop-flow {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .coop-flow__item {
  padding: 22px 20px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--turf);
  background: rgba(12, 28, 51, .5);
}

.page-contact .coop-flow__step {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--turf);
}

.page-contact .coop-flow__item h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--text);
}

.page-contact .coop-flow__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 常见问题 ---------- */
.page-contact .coop-faq {
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

.page-contact .coop-faq details {
  border: 1px solid var(--line-soft);
  background: rgba(12, 28, 51, .55);
  transition: border-color .25s var(--ease);
}

.page-contact .coop-faq details[open] {
  border-color: var(--whistle);
}

.page-contact .coop-faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  padding: 19px 20px;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
}

.page-contact .coop-faq summary::-webkit-details-marker {
  display: none;
}

.page-contact .coop-faq summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--whistle);
}

.page-contact .coop-faq details[open] summary::after {
  content: "−";
}

.page-contact .coop-faq summary:focus-visible {
  outline: 2px solid var(--whistle);
  outline-offset: -2px;
}

.page-contact .coop-faq p {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 收尾 ---------- */
.page-contact .coop-cta {
  margin-top: clamp(48px, 7vw, 88px);
  padding: clamp(32px, 5vw, 52px) 0;
  background: linear-gradient(120deg, rgba(255, 210, 74, .12), rgba(12, 28, 51, .4) 70%);
  border-top: 1px solid var(--line);
}

.page-contact .coop-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.page-contact .coop-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.3;
  color: var(--text);
}

.page-contact .coop-cta__sub {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .coop-directions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-contact .coop-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .coop-step {
    padding: 26px 26px;
    gap: 24px;
  }
}

@media (min-width: 980px) {
  .page-contact .coop-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(290px, .85fr);
    align-items: start;
  }

  .page-contact .coop-layout {
    grid-template-columns: var(--coop-rail-w) minmax(0, 1fr);
  }

  .page-contact .coop-rail {
    position: sticky;
    top: 84px;
    align-self: start;
  }

  .page-contact .coop-rail__list {
    flex-direction: column;
    gap: 8px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-contact .coop-rail__list a {
    display: flex;
    width: 100%;
    border-color: transparent;
    border-left: 2px solid var(--line);
    background: transparent;
    padding-left: 12px;
  }

  .page-contact .coop-rail__list a:hover,
  .page-contact .coop-rail__list a:focus-visible {
    border-left-color: var(--whistle);
    background: rgba(27, 47, 58, .5);
  }
}

@media (min-width: 1120px) {
  .page-contact .coop-figure {
    margin-top: 42px;
  }
}