.page-contact {
  --coop-radius: 28px;
  --coop-glow: 0 0 0 1px rgba(53, 240, 200, .38), 0 18px 44px rgba(0, 0, 0, .45);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .hero-coop {
  position: relative;
  overflow: hidden;
  padding: 46px 0 54px;
  background:
    linear-gradient(160deg, rgba(11, 31, 26, .94) 0%, rgba(18, 22, 26, .96) 58%, rgba(20, 36, 58, .94) 100%);
  border-bottom: 1px solid var(--line);
}

.page-contact .hero-coop__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: .3;
}

.page-contact .hero-coop__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: center 40%;
  filter: saturate(.7) contrast(1.05);
}

.page-contact .hero-coop__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(53, 240, 200, .16), transparent 58%),
    radial-gradient(90% 80% at 88% 100%, rgba(242, 179, 61, .12), transparent 62%),
    linear-gradient(180deg, rgba(11, 31, 26, .55), rgba(11, 31, 26, .92));
}

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

.page-contact .crumb {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-contact .crumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .crumb a:hover,
.page-contact .crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.page-contact .crumb__sep {
  margin: 0 8px;
  color: rgba(124, 140, 134, .6);
}

.page-contact .hero-coop__kicker {
  margin: 0 0 14px;
  color: var(--cyan);
}

.page-contact .hero-coop__title {
  margin: 0 0 20px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 56px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .hero-coop__lead {
  max-width: 40rem;
  margin: 0 0 26px;
  font-size: 16px;
}

.page-contact .hero-coop__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 展签卡片 ---------- */
.page-contact .coop-tracks .section__head {
  margin-bottom: 32px;
}

.page-contact .coop-tracks .section__head .prose {
  margin-top: 14px;
}

.page-contact .track-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.page-contact .track-card {
  position: relative;
  border-radius: var(--coop-radius);
  background: linear-gradient(180deg, rgba(20, 36, 58, .78), rgba(18, 22, 26, .9));
  border: 1px solid var(--line);
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}

.page-contact .track-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  bottom: 26px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--cyan), transparent 92%);
  opacity: .5;
  transition: opacity .28s ease;
}

.page-contact .track-card:hover,
.page-contact .track-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--coop-glow);
}

.page-contact .track-card:hover::before,
.page-contact .track-card:focus-within::before {
  opacity: 1;
}

.page-contact .track-card__btn {
  display: block;
  width: 100%;
  padding: 26px 24px 20px;
  text-align: left;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.page-contact .track-card__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: var(--coop-radius);
}

.page-contact .track-card__no {
  display: block;
  margin-bottom: 12px;
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  color: rgba(53, 240, 200, .5);
}

.page-contact .track-card__title {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .track-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .track-card__more {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .track-card__panel {
  display: grid;
  gap: 10px;
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  border-top: 1px solid transparent;
  transition: max-height .34s ease, padding .34s ease, border-color .34s ease;
}

.page-contact .track-card[data-open] .track-card__panel {
  max-height: 320px;
  padding: 16px 24px 24px;
  border-top-color: var(--line);
}

.page-contact .track-card__row {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .track-card__key {
  display: inline-block;
  min-width: 72px;
  margin-right: 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

/* ---------- 现场场景 ---------- */
.page-contact .coop-scene {
  display: grid;
  gap: 22px;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.page-contact .coop-scene__media .media__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-contact .coop-scene h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .coop-scene__copy .prose {
  margin: 0;
}

.page-contact .coop-scene__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid var(--line-gold);
}

/* ---------- 支持项 ---------- */
.page-contact .coop-support {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-support__grid {
  gap: 30px;
}

.page-contact .coop-support__head h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .support-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line-strong);
}

.page-contact .support-item {
  position: relative;
  padding: 0 0 22px;
}

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

.page-contact .support-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 200, .14);
}

.page-contact .support-item dt {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-contact .support-item dd {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .coop-support__aside {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 22px;
  border-radius: var(--coop-radius);
  background: linear-gradient(200deg, rgba(122, 107, 255, .14), rgba(18, 22, 26, .92) 62%);
  border: 1px solid var(--line);
}

.page-contact .coop-support__aside .stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-contact .coop-support__aside .stat:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .coop-support__aside .stat__value {
  font-size: 30px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-contact .coop-support__aside .stat__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

.page-contact .coop-support__aside-note {
  margin: 4px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 流程 ---------- */
.page-contact .coop-flow .section__head {
  margin-bottom: 30px;
}

.page-contact .flow-list {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-contact .flow-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(122, 107, 255, .5) 62%, rgba(53, 240, 200, .1));
  border-radius: 2px;
}

.page-contact .flow-step {
  position: relative;
  padding: 0 0 20px;
}

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

.page-contact .flow-step__node {
  position: absolute;
  left: -30px;
  top: 16px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  transition: background .25s ease, box-shadow .25s ease;
}

.page-contact .flow-step[data-active] .flow-step__node {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(53, 240, 200, .16);
}

.page-contact .flow-step__btn {
  display: grid;
  gap: 6px;
  width: 100%;
  padding: 14px 18px;
  text-align: left;
  background: rgba(20, 36, 58, .5);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color .25s ease, background .25s ease;
}

.page-contact .flow-step__btn:hover,
.page-contact .flow-step__btn:focus-visible {
  border-color: var(--line-strong);
  background: rgba(20, 36, 58, .78);
}

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

.page-contact .flow-step__no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .flow-step__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .flow-step__eta {
  font-size: 13px;
  color: var(--muted);
}

.page-contact .flow-step__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height .34s ease, margin .34s ease;
}

.page-contact .flow-step[data-active] .flow-step__panel {
  max-height: 320px;
  margin-top: 10px;
}

.page-contact .flow-step__panel p {
  margin: 0;
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  border-left: 2px solid var(--line-strong);
  background: rgba(11, 31, 26, .55);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ---------- 适配建议 ---------- */
.page-contact .coop-fit .section__head {
  margin-bottom: 30px;
}

.page-contact .fit-list {
  display: grid;
  gap: 16px;
}

.page-contact .fit-row {
  display: grid;
  gap: 12px;
  padding: 22px;
  border-radius: var(--coop-radius);
  background: linear-gradient(120deg, rgba(18, 22, 26, .92), rgba(20, 36, 58, .7));
  border: 1px solid var(--line);
  transition: border-color .25s ease, transform .25s ease;
}

.page-contact .fit-row:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-contact .fit-row__tag {
  justify-self: start;
}

.page-contact .fit-row__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .fit-row__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .coop-fit__more {
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .coop-fit__more a,
.page-contact .coop-contact__head a,
.page-contact .coop-faq__more a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .coop-fit__more a:hover,
.page-contact .coop-contact__head a:hover,
.page-contact .coop-faq__more a:hover {
  color: var(--gold);
  border-bottom-color: var(--line-gold);
}

/* ---------- 联系区 ---------- */
.page-contact .coop-contact__panel {
  position: relative;
  overflow: hidden;
  padding: 30px 22px;
  border-radius: var(--coop-radius);
  background:
    linear-gradient(135deg, rgba(20, 36, 58, .96), rgba(18, 22, 26, .96) 66%, rgba(11, 31, 26, .96));
  border: 1px solid var(--line-strong);
}

.page-contact .coop-contact__panel::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 240, 200, .18), transparent 68%);
  pointer-events: none;
}

.page-contact .coop-contact__head h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-contact .coop-contact__head .prose {
  margin: 0;
}

.page-contact .contact-rows {
  display: grid;
  gap: 12px;
  margin-top: 26px;
  position: relative;
  z-index: 1;
}

.page-contact .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(11, 31, 26, .66);
  border: 1px solid var(--line);
}

.page-contact .contact-row--plain {
  align-items: flex-start;
}

.page-contact .contact-row__key {
  flex: 0 0 auto;
  color: var(--muted);
}

.page-contact .contact-row__value {
  flex: 1 1 240px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .contact-row__value--text {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: normal;
}

.page-contact .contact-row__copy {
  flex: 0 0 auto;
  padding: 7px 16px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--gold);
  border: 0;
  border-radius: var(--pill);
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.page-contact .contact-row__copy:hover {
  background: var(--mint);
}

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

.page-contact .contact-row__copy[data-copied] {
  background: var(--cyan);
}

.page-contact .coop-contact__note {
  margin: 20px 0 0;
  padding-top: 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  border-top: 1px solid var(--line);
  position: relative;
  z-index: 1;
}

/* ---------- FAQ ---------- */
.page-contact .coop-faq .section__head {
  margin-bottom: 26px;
}

.page-contact .faq-list {
  display: grid;
  gap: 10px;
}

.page-contact .faq-item {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(18, 22, 26, .8);
  overflow: hidden;
  transition: border-color .25s ease;
}

.page-contact .faq-item[open] {
  border-color: var(--line-strong);
}

.page-contact .faq-item__q {
  position: relative;
  padding: 16px 44px 16px 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .25s ease;
}

.page-contact .faq-item[open] .faq-item__q::after {
  transform: translateY(-50%) rotate(45deg);
  color: var(--gold);
}

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

.page-contact .faq-item__a {
  padding: 0 18px 18px;
}

.page-contact .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .coop-faq__more {
  margin: 24px 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .track-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .contact-row {
    flex-wrap: nowrap;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-coop {
    padding: 66px 0 76px;
  }

  .page-contact .coop-scene {
    grid-template-columns: 8fr 5fr;
    align-items: center;
    gap: 34px;
  }

  .page-contact .grid--7-5.coop-support__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

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

  .page-contact .coop-contact__panel {
    padding: 42px 40px;
  }
}

@media (min-width: 1120px) {
  .page-contact .track-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .track-card,
  .page-contact .fit-row,
  .page-contact .flow-step__node,
  .page-contact .track-card__panel,
  .page-contact .flow-step__panel,
  .page-contact .faq-item__q::after {
    transition: none;
  }

  .page-contact .track-card:hover,
  .page-contact .fit-row:hover {
    transform: none;
  }
}
</main>