.page-contact {
  --pc-indent: 34px;
  --pc-block-space: 64px;
  padding-bottom: 88px;
}

/* ---------- 顶部备案横条 ---------- */
.page-contact .legal-bar {
  background: rgba(11, 35, 56, 0.62);
  border-bottom: 1px solid var(--line);
}

.page-contact .legal-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 9px 0;
  font-size: var(--fs-13);
  color: var(--muted);
}

.page-contact .legal-bar__sep {
  color: var(--panel-2);
}

.page-contact .breadcrumb {
  padding: 20px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-intro {
  position: relative;
  padding: 34px 0 44px;
  overflow: hidden;
}

.page-contact .contact-intro::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -180px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 38%, rgba(52, 226, 212, 0.16), rgba(31, 169, 201, 0) 66%);
  pointer-events: none;
}

.page-contact .contact-intro__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-contact .contact-intro__eyebrow {
  margin: 0 0 14px;
  font-size: var(--fs-13);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-contact .contact-intro__title {
  margin: 0 0 18px;
  font-size: var(--fs-40);
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 20ch;
}

.page-contact .contact-intro__lead {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-intro__facts {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.page-contact .fact {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .fact__key {
  margin: 0 0 6px;
  font-size: var(--fs-13);
  color: var(--muted);
}

.page-contact .fact__val {
  margin: 0;
  font-size: var(--fs-21);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* ---------- 页面骨架 ---------- */
.page-contact .contact-body {
  display: block;
}

/* ---------- 左侧轨道 ---------- */
.page-contact .rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 28px 0 34px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.page-contact .rail::-webkit-scrollbar {
  display: none;
}

.page-contact .rail__title {
  display: none;
}

.page-contact .rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--glass);
  color: var(--muted);
  font-size: var(--fs-15);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease-out, background-color 180ms ease-out;
}

.page-contact .rail__link:hover,
.page-contact .rail__link:focus-visible {
  color: var(--text);
  background: var(--glass-strong);
}

.page-contact .rail__num {
  font-size: var(--fs-13);
  color: var(--cyan-deep);
}

/* ---------- 内容节奏 ---------- */
.page-contact .contact-flow > * + * {
  margin-top: 56px;
}

.page-contact .section-head {
  margin-bottom: 20px;
}

.page-contact .lead-line {
  margin: 0 0 28px;
  max-width: 66ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .lead-line a,
.page-contact .materials__note a,
.page-contact .fold__body a,
.page-contact .reach-card__tip a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 226, 212, 0.35);
  transition: border-color 180ms ease-out;
}

.page-contact .lead-line a:hover,
.page-contact .materials__note a:hover,
.page-contact .fold__body a:hover,
.page-contact .reach-card__tip a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 合作类型块 ---------- */
.page-contact .coop-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-contact .coop {
  position: relative;
  padding: 26px 22px 22px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(31, 169, 201, 0.16), rgba(11, 35, 56, 0.9) 64%);
  overflow: hidden;
}

.page-contact .coop::after {
  content: "";
  position: absolute;
  right: -46px;
  top: -58px;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 42%, rgba(52, 226, 212, 0.2), rgba(52, 226, 212, 0) 68%);
  pointer-events: none;
}

.page-contact .coop--b {
  background: linear-gradient(155deg, rgba(255, 107, 74, 0.14), rgba(11, 35, 56, 0.92) 66%);
}

.page-contact .coop--b::after {
  background: radial-gradient(circle at 42% 42%, rgba(255, 107, 74, 0.2), rgba(255, 107, 74, 0) 68%);
}

.page-contact .coop--c {
  background: linear-gradient(155deg, rgba(87, 214, 138, 0.12), rgba(11, 35, 56, 0.92) 64%);
}

.page-contact .coop--c::after {
  background: radial-gradient(circle at 42% 42%, rgba(87, 214, 138, 0.18), rgba(87, 214, 138, 0) 68%);
}

.page-contact .coop--d {
  background: linear-gradient(155deg, rgba(31, 169, 201, 0.2), rgba(18, 64, 95, 0.46) 70%, rgba(11, 35, 56, 0.92));
}

.page-contact .coop__index {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .coop--b .coop__index {
  color: var(--coral);
}

.page-contact .coop--c .coop__index {
  color: var(--green);
}

.page-contact .coop__title {
  position: relative;
  z-index: 1;
  margin: 0 0 10px;
  font-size: var(--fs-21);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .coop__for,
.page-contact .coop__text {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: var(--fs-15);
  line-height: 1.75;
}

.page-contact .coop__for {
  color: var(--text);
}

.page-contact .coop__text {
  color: var(--muted);
}

.page-contact .coop__more {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(29, 74, 99, 0.85);
}

.page-contact .coop__more .fold__head {
  font-size: var(--fs-15);
  color: var(--cyan);
}

.page-contact .coop__more .fold__body p {
  margin: 8px 0 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 流程 ---------- */
.page-contact .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .flow-step {
  position: relative;
  padding: 0 0 26px var(--pc-indent);
  border-left: 1px solid var(--line);
}

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

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(52, 226, 212, 0.13);
}

.page-contact .flow-step__num {
  display: block;
  font-size: var(--fs-13);
  letter-spacing: 0.1em;
  color: var(--cyan-deep);
}

.page-contact .flow-step__title {
  margin: 6px 0 8px;
  font-size: var(--fs-21);
  font-weight: 600;
  color: var(--text);
}

.page-contact .flow-step__text {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .flow-figure {
  margin: 32px 0 0;
}

.page-contact .media-frame {
  display: block;
}

.page-contact .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
}

.page-contact .media-frame__caption {
  margin-top: 12px;
  font-size: var(--fs-13);
  color: var(--muted);
}

/* ---------- 材料 ---------- */
.page-contact .materials {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-contact .material {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-contact .material__title {
  margin: 0 0 8px;
  font-size: var(--fs-17);
  font-weight: 600;
  color: var(--text);
}

.page-contact .material p {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .materials__note {
  margin: 26px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--panel-2);
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联络 ---------- */
.page-contact .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-contact .reach-card {
  padding: 26px 22px;
}

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

.page-contact .reach-item {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(29, 74, 99, 0.8);
}

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

.page-contact .reach-item__key {
  font-size: var(--fs-13);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .reach-item__val {
  font-size: var(--fs-17);
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-contact .reach-item__val.mono {
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-contact .reach-card__tip {
  margin: 20px 0 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .reach-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.page-contact .reach-clock {
  position: relative;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--cyan) 0 37.5%, rgba(29, 74, 99, 0.6) 37.5% 100%);
}

.page-contact .reach-clock::before {
  content: "";
  position: absolute;
  inset: 11px;
  border-radius: 50%;
  background: var(--abyss);
}

.page-contact .reach-clock__text {
  position: relative;
  z-index: 1;
  font-size: var(--fs-13);
  line-height: 1.5;
  text-align: center;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-contact .reach-aside__note {
  margin: 0;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .reach-figure {
  margin: 32px 0 0;
}

/* ---------- 常见问题 ---------- */
.page-contact .faq-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  border-top: 1px solid var(--line);
}

.page-contact .faq-list .fold {
  border-bottom: 1px solid var(--line);
}

.page-contact .faq-list .fold__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  font-size: var(--fs-17);
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .faq-list .fold__mark {
  flex: 0 0 auto;
  width: 20px;
  font-family: var(--font-mono);
  color: var(--cyan);
  transition: transform 260ms ease-out;
}

.page-contact .faq-list .fold[open] .fold__mark {
  transform: rotate(45deg);
}

.page-contact .faq-list .fold__body {
  padding: 0 0 20px 32px;
}

.page-contact .faq-list .fold__body p {
  margin: 0;
  max-width: 68ch;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 窄屏保底 ---------- */
@media (max-width: 480px) {
  .page-contact .contact-intro__title {
    font-size: var(--fs-28);
  }

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

  .page-contact .coop {
    padding: 22px 18px 18px;
  }

  .page-contact .reach-card {
    padding: 22px 18px;
  }
}

/* ---------- 中等屏 ---------- */
@media (min-width: 680px) {
  .page-contact .contact-intro {
    padding: 48px 0 60px;
  }

  .page-contact .contact-intro__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: end;
    gap: 44px;
  }

  .page-contact .contact-intro__facts {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .page-contact .materials {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 30px;
  }

  .page-contact .reach-grid {
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: start;
    gap: 30px;
  }
}

/* ---------- 桌面：左轨 + 非对称正文 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-body {
    display: grid;
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    margin-top: 36px;
  }

  .page-contact .rail {
    position: sticky;
    top: 128px;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    margin: 0;
    padding-bottom: 0;
    border-bottom: 0;
    overflow: visible;
  }

  .page-contact .rail__title {
    display: block;
    margin: 20px 0 8px;
    padding-left: 14px;
    font-family: var(--font-mono);
    font-size: var(--fs-13);
    letter-spacing: 0.1em;
    color: var(--muted);
  }

  .page-contact .rail__title:first-child {
    margin-top: 0;
  }

  .page-contact .rail__link {
    position: relative;
    width: 100%;
    padding: 9px 12px 9px 14px;
    border-radius: var(--radius-s);
    background: transparent;
  }

  .page-contact .rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    border-radius: 2px;
    background: transparent;
    transition: background-color 180ms ease-out;
  }

  .page-contact .rail__link:hover {
    background: var(--glass);
  }

  .page-contact .rail__link[aria-current="true"] {
    color: var(--cyan);
    background: transparent;
  }

  .page-contact .rail__link[aria-current="true"]::before {
    background: var(--cyan);
  }

  .page-contact .contact-flow > * + * {
    margin-top: var(--pc-block-space);
  }

  .page-contact .coop-list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .coop--a {
    grid-column: 1 / span 7;
  }

  .page-contact .coop--b {
    grid-column: 9 / span 4;
    margin-top: 36px;
  }

  .page-contact .coop--c {
    grid-column: 1 / span 4;
  }

  .page-contact .coop--d {
    grid-column: 6 / span 7;
    margin-top: 28px;
  }

  .page-contact .flow-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow-step {
    padding: 28px 24px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

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

  .page-contact .flow-step::before {
    left: 0;
    top: -5px;
  }

  .page-contact .flow-step::after {
    content: "";
    position: absolute;
    left: 10px;
    right: 0;
    top: -1px;
    height: 2px;
    background: linear-gradient(90deg, rgba(52, 226, 212, 0.55), rgba(31, 169, 201, 0));
    pointer-events: none;
  }

  .page-contact .flow-step:last-child::after {
    display: none;
  }

  .page-contact .materials {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 30px 28px;
  }

  .page-contact .material {
    grid-column: span 6;
  }

  .page-contact .reach-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .rail__link,
  .page-contact .faq-list .fold__mark,
  .page-contact .lead-line a {
    transition: none;
  }
}
</main>