.page-contact {
  overflow-x: hidden;
}

/* ============ 首屏：左边邀约，右边现场 ============ */
.page-contact .contact-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 28px;
  padding-bottom: 16px;
  align-items: center;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -80px;
  width: min(560px, 86vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 68% 32%, rgba(37, 226, 212, 0.15), transparent 64%);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .hero-copy .eyebrow {
  margin: 0 0 18px;
}

.page-contact .hero-copy h1 {
  margin: 0 0 22px;
}

.page-contact .hero-copy .lede {
  max-width: 48ch;
  margin: 0 0 28px;
  color: var(--c-muted);
  font-size: 17px;
  line-height: 1.8;
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.page-contact .hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--c-line);
}

.page-contact .hero-facts li {
  padding: 16px 12px 0 0;
  border-right: 1px solid var(--c-line);
}

.page-contact .hero-facts li:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-contact .hero-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

.page-contact .hero-facts__label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--c-quiet);
}

/* 首屏配图 */
.page-contact .hero-media {
  position: relative;
  margin: 0;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-contact .hero-media::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange), var(--c-magenta));
}

.page-contact .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .hero-media figcaption {
  padding: 12px 16px;
  background: var(--c-panel-2);
  border-top: 2px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ============ 通用区块骨架 ============ */
.page-contact .section {
  padding-top: 60px;
  padding-bottom: 60px;
  margin-top: 40px;
  border-top: 2px solid var(--c-line);
}

.page-contact .section-head {
  display: grid;
  gap: 14px;
  max-width: 64ch;
  margin-bottom: 38px;
}

.page-contact .section-head h2 {
  margin: 0;
}

.page-contact .section-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ============ 01 四类合作方向 ============ */
.page-contact .dir-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .dir-card {
  --card-accent: var(--c-cyan);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 22px;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-contact .dir-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent);
}

.page-contact .dir-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--card-accent);
}

.page-contact .dir-card--cyan { --card-accent: var(--c-cyan); }
.page-contact .dir-card--orange { --card-accent: var(--c-orange); }
.page-contact .dir-card--indigo { --card-accent: var(--c-indigo); }
.page-contact .dir-card--magenta { --card-accent: var(--c-magenta); }

.page-contact .dir-card__num {
  align-self: flex-start;
  padding: 3px 8px;
  background: var(--c-magenta);
  color: var(--c-void);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.4;
}

.page-contact .dir-card__title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-contact .dir-card__who {
  margin: 0;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--c-muted);
}

.page-contact .dir-card__body {
  flex: 1;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-contact .dir-card__gain {
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--card-accent);
  font-size: 13.5px;
  line-height: 1.7;
  font-weight: 500;
  color: var(--c-ink);
}

.page-contact .dir-visual {
  margin: 30px 0 0;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-orange);
  overflow: hidden;
}

.page-contact .dir-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

/* ============ 02 流程时间轴 ============ */
.page-contact .flow-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .flow-step {
  min-width: 0;
}

.page-contact .flow-details {
  height: 100%;
  background: var(--c-panel);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.page-contact .flow-details:hover,
.page-contact .flow-details[open] {
  border-color: var(--c-orange);
}

.page-contact .flow-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 16px 16px 15px;
  border-top: 4px solid var(--c-orange);
}

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

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

.page-contact .flow-step__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-orange);
  font-variant-numeric: tabular-nums;
}

.page-contact .flow-step__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-contact .flow-step__hint {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-quiet);
}

.page-contact .flow-step__hint::after {
  content: " ▾";
}

.page-contact .flow-details[open] .flow-step__hint::after {
  content: " ▴";
}

.page-contact .flow-step__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--c-line);
}

.page-contact .flow-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ============ 03 材料清单 + 方向筛选 ============ */
.page-contact .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px;
  margin-bottom: 24px;
  background: var(--c-panel-2);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
}

.page-contact .filter-btn {
  padding: 8px 14px;
  background: transparent;
  color: var(--c-muted);
  border: 2px solid var(--c-line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-contact .filter-btn:hover {
  color: var(--c-ink);
  border-color: var(--c-quiet);
}

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

.page-contact .filter-btn[aria-pressed="true"] {
  color: var(--c-void);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  font-weight: 700;
}

.page-contact .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
  font-variant-numeric: tabular-nums;
}

.page-contact .material-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--c-line);
}

.page-contact .material {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .material[hidden],
.page-contact .material.is-hidden {
  display: none;
}

.page-contact .material__name {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-contact .material__name::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  vertical-align: 1px;
  background: var(--c-cyan);
  transform: rotate(45deg);
}

.page-contact .material__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ============ 04 联系卡 ============ */
.page-contact .contact-card {
  max-width: 780px;
  background: var(--c-panel);
  border: 2px solid var(--c-orange);
  border-radius: var(--radius);
  box-shadow: var(--shadow-orange);
  overflow: hidden;
}

.page-contact .contact-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 2px solid var(--c-line);
  background: linear-gradient(90deg, rgba(255, 122, 26, 0.16), rgba(37, 226, 212, 0.06));
}

.page-contact .contact-card__hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--c-muted);
}

.page-contact .contact-lines {
  margin: 0;
  padding: 0;
}

.page-contact .contact-line {
  display: grid;
  grid-template-columns: 1fr;
  gap: 5px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--c-line);
}

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

.page-contact .contact-line__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-quiet);
}

.page-contact .contact-line__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.65;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.page-contact .contact-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--c-line);
  max-width: 780px;
}

.page-contact .contact-next__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-quiet);
}

.page-contact .contact-next a {
  font-size: 14px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 226, 212, 0.4);
  padding-bottom: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .contact-next a:hover,
.page-contact .contact-next a:focus-visible {
  color: var(--c-orange);
  border-color: var(--c-orange);
}

/* ============ 05 常见疑问 ============ */
.page-contact .faq-list {
  display: grid;
  gap: 12px;
}

.page-contact .faq-item {
  background: var(--c-panel-2);
  border: 2px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .faq-item[open] {
  background: var(--c-panel);
  border-color: var(--c-cyan);
}

.page-contact .faq-q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

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

.page-contact .faq-q::before {
  content: "Q";
  flex: none;
  margin-top: 3px;
  padding: 1px 6px;
  border: 2px solid var(--c-cyan);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.3;
  color: var(--c-cyan);
}

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

.page-contact .faq-a {
  padding: 0 20px 20px 56px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-contact .faq-a p {
  margin: 0 0 10px;
}

.page-contact .faq-a p:last-child {
  margin-bottom: 0;
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-contact .contact-line {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 22px;
  }
}

@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding-top: 40px;
    padding-bottom: 24px;
  }

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

  .page-contact .material {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.7fr);
    gap: 30px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 54px;
    padding-top: 52px;
    padding-bottom: 32px;
  }

  .page-contact .section {
    padding-top: 76px;
    padding-bottom: 76px;
    margin-top: 56px;
  }

  .page-contact .flow-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    align-items: start;
  }

  .page-contact .hero-copy .lede {
    font-size: 18px;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  .page-contact .dir-card,
  .page-contact .flow-details,
  .page-contact .filter-btn,
  .page-contact .faq-item,
  .page-contact .contact-next a {
    transition: none;
  }

  .page-contact .dir-card:hover {
    transform: none;
  }
}