.page-contact {
  --contact-line: rgba(56, 242, 208, 0.20);
  --contact-edge: rgba(234, 246, 255, 0.10);
  --contact-glow: rgba(56, 242, 208, 0.12);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .contact-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 4vw, 44px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto 30%;
  height: 520px;
  background: radial-gradient(circle at 50% 50%, var(--contact-glow), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 5vw, 56px);
  align-items: center;
}

.page-contact .contact-hero__intro h1 {
  margin: 12px 0 0;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.page-contact .contact-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  line-height: 1.78;
  color: var(--c-dim);
}

.page-contact .contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-l);
  background: var(--c-midnight);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transform: rotate(-1.2deg);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px var(--contact-line);
  pointer-events: none;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 14 / 9;
  opacity: 0.92;
}

.page-contact .contact-hero__media figcaption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  right: 16px;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-cyan-soft);
  background: rgba(6, 20, 38, 0.78);
  border-left: 2px solid var(--c-cyan);
  border-radius: 4px;
}

/* ---------- 两大联系卡 ---------- */
.page-contact .contact-channels__grid {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background:
    linear-gradient(160deg, var(--c-paper), var(--c-midnight) 78%);
  box-shadow: var(--shadow-1);
}

.page-contact .channel-card--mail {
  border-color: var(--contact-line);
}

.page-contact .channel-card--phone {
  border-color: rgba(255, 107, 74, 0.28);
}

.page-contact .channel-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-dim);
}

.page-contact .channel-card__value {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 5.2vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--c-cyan);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-card--phone .channel-card__value {
  color: var(--c-gold);
}

.page-contact .channel-card__note {
  margin: 16px 0 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-dim);
}

.page-contact .channel-card__action {
  margin-top: 22px;
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(40px, 7vw, 80px);
}

.page-contact .contact-main {
  display: grid;
  gap: clamp(32px, 6vw, 64px);
  min-width: 0;
}

.page-contact .contact-block h2 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-contact .contact-block h2::before {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin-bottom: 14px;
  background: var(--c-cyan);
  border-radius: 2px;
}

.page-contact .contact-block__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-dim);
}

.page-contact .contact-block__foot {
  margin: 20px 0 0;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
  background: rgba(56, 242, 208, 0.07);
  border-left: 3px solid var(--c-cyan);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* 三点清单 */
.page-contact .check-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .check-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 16px 16px 14px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.62);
}

.page-contact .check-list__mark {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-coral);
}

.page-contact .check-list strong {
  display: block;
  font-size: 15px;
  color: var(--c-ink);
}

.page-contact .check-list p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-dim);
}

/* ---------- 咨询类型切换 ---------- */
.page-contact .consult-tabs {
  margin-top: 26px;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--contact-line);
  border-radius: var(--radius-m);
  background: linear-gradient(200deg, var(--c-midnight), var(--c-deep));
  box-shadow: var(--shadow-1);
}

.page-contact .tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  clip-path: inset(50%);
  overflow: hidden;
}

.page-contact .tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .tab-pill {
  padding: 8px 16px;
  font-size: 14px;
  line-height: 1.3;
  color: var(--c-dim);
  border: 1px solid var(--contact-edge);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .tab-pill:hover {
  color: var(--c-ink);
  border-color: var(--contact-line);
}

.page-contact #consult-data:checked ~ .tab-bar label[for="consult-data"],
.page-contact #consult-app:checked ~ .tab-bar label[for="consult-app"],
.page-contact #consult-coop:checked ~ .tab-bar label[for="consult-coop"] {
  color: var(--c-deep);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  font-weight: 700;
}

.page-contact #consult-data:focus-visible ~ .tab-bar label[for="consult-data"],
.page-contact #consult-app:focus-visible ~ .tab-bar label[for="consult-app"],
.page-contact #consult-coop:focus-visible ~ .tab-bar label[for="consult-coop"] {
  outline: 2px solid var(--c-coral);
  outline-offset: 3px;
}

.page-contact .tab-panels {
  margin-top: 18px;
}

.page-contact .tab-panel {
  display: none;
  padding: 18px;
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.55);
  border: 1px dashed var(--contact-line);
}

.page-contact #consult-data:checked ~ .tab-panels .tab-panel[data-panel="data"],
.page-contact #consult-app:checked ~ .tab-panels .tab-panel[data-panel="app"],
.page-contact #consult-coop:checked ~ .tab-panels .tab-panel[data-panel="coop"] {
  display: block;
}

.page-contact .tab-panel__title {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--c-cyan-soft);
}

.page-contact .tab-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-ink);
}

/* ---------- 合作四类 ---------- */
.page-contact .coop-grid {
  margin-top: 24px;
}

.page-contact .coop-card {
  padding: 20px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.48);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-contact .coop-card:hover {
  border-color: var(--contact-line);
  transform: translateY(-2px);
}

.page-contact .coop-card h3 {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-contact .coop-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-dim);
}

/* ---------- 侧边信息轨道 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 18px;
  align-content: start;
  min-width: 0;
}

.page-contact .rail-card {
  position: relative;
  padding: 22px 20px 22px 26px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background: linear-gradient(190deg, var(--c-midnight), var(--c-deep));
  box-shadow: var(--shadow-1);
}

.page-contact .rail-card::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), transparent 85%);
}

.page-contact .rail-card::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 12px var(--c-cyan);
}

.page-contact .rail-card--where::before {
  background: linear-gradient(180deg, var(--c-coral), transparent 85%);
}

.page-contact .rail-card--where::after {
  background: var(--c-coral);
  box-shadow: 0 0 12px var(--c-coral);
}

.page-contact .rail-card__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-dim);
}

.page-contact .rail-card h2 {
  margin: 8px 0 0;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}

.page-contact .rail-card__big {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2rem);
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-contact .rail-card__big span {
  margin: 0 4px;
  color: var(--c-dim);
}

.page-contact .rail-card__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--c-dim);
}

.page-contact .rail-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .rail-list li {
  position: relative;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-contact .rail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-cyan-soft);
}

.page-contact .rail-info {
  margin: 14px 0 0;
  display: grid;
  gap: 2px;
}

.page-contact .rail-info dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-dim);
}

.page-contact .rail-info dd {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

.page-contact .rail-info dd:last-child {
  margin-bottom: 0;
}

.page-contact .rail-info a {
  color: var(--c-cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(159, 255, 232, 0.35);
}

.page-contact .rail-info a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 答疑快捷入口 ---------- */
.page-contact .contact-faq__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .contact-faq__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background: var(--c-midnight);
  overflow: hidden;
}

.page-contact .contact-faq__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
  opacity: 0.85;
}

.page-contact .contact-faq__media figcaption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  right: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan-soft);
}

.page-contact .contact-faq__content h2 {
  margin: 0;
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .contact-faq__lead {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-dim);
}

.page-contact .faq-links {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .faq-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 16px;
  text-decoration: none;
  border: 1px solid var(--contact-edge);
  border-left: 3px solid var(--c-cyan);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(16, 46, 74, 0.5);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .faq-links a:hover {
  background: rgba(56, 242, 208, 0.10);
  border-left-color: var(--c-coral);
}

.page-contact .faq-links__title {
  flex: 1 1 12em;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .faq-links__desc {
  flex: 0 1 auto;
  font-size: 13px;
  color: var(--c-dim);
}

.page-contact .faq-links a:hover .faq-links__title {
  color: var(--c-cyan-soft);
}

.page-contact .faq-links a:focus-visible,
.page-contact .rail-info a:focus-visible,
.page-contact .btn:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 3px;
}

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

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
  }

  .page-contact .contact-body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-contact .contact-faq__grid {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--rail-w) + 24px);
    position: -webkit-sticky;
  }

  .page-contact .contact-hero__media {
    transform: rotate(-1.6deg) translateY(-6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-hero__media,
  .page-contact .coop-card,
  .page-contact .tab-pill,
  .page-contact .faq-links a {
    transition: none;
    transform: none;
  }
}

.page-contact {
  --contact-line: rgba(56, 242, 208, 0.20);
  --contact-edge: rgba(234, 246, 255, 0.10);
  --contact-glow: rgba(56, 242, 208, 0.12);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .contact-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 4vw, 44px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto 30%;
  height: 520px;
  background: radial-gradient(circle at 50% 50%, var(--contact-glow), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 5vw, 56px);
  align-items: center;
}

.page-contact .contact-hero__intro h1 {
  margin: 12px 0 0;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}

.page-contact .contact-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 2.4vw, 1.125rem);
  line-height: 1.78;
  color: var(--c-dim);
}

.page-contact .contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-l);
  background: var(--c-midnight);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transform: rotate(-1.2deg);
}

.page-contact .contact-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px var(--contact-line);
  pointer-events: none;
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 14 / 9;
  opacity: 0.92;
}

.page-contact .contact-hero__media figcaption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  right: 16px;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-cyan-soft);
  background: rgba(6, 20, 38, 0.78);
  border-left: 2px solid var(--c-cyan);
  border-radius: 4px;
}

/* ---------- 两大联系卡 ---------- */
.page-contact .contact-channels__grid {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background: linear-gradient(160deg, var(--c-paper), var(--c-midnight) 78%);
  box-shadow: var(--shadow-1);
}

.page-contact .channel-card--mail {
  border-color: var(--contact-line);
}

.page-contact .channel-card--phone {
  border-color: rgba(255, 107, 74, 0.28);
}

.page-contact .channel-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--c-dim);
}

.page-contact .channel-card__value {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 5.2vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--c-cyan);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-card--phone .channel-card__value {
  color: var(--c-gold);
}

.page-contact .channel-card__note {
  margin: 16px 0 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-dim);
}

.page-contact .channel-card__action {
  margin-top: 22px;
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(40px, 7vw, 80px);
}

.page-contact .contact-main {
  display: grid;
  gap: clamp(32px, 6vw, 64px);
  min-width: 0;
}

.page-contact .contact-block h2 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-contact .contact-block h2::before {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  margin-bottom: 14px;
  background: var(--c-cyan);
  border-radius: 2px;
}

.page-contact .contact-block__lead {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-dim);
}

.page-contact .contact-block__foot {
  margin: 20px 0 0;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-ink);
  background: rgba(56, 242, 208, 0.07);
  border-left: 3px solid var(--c-cyan);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* 三点清单 */
.page-contact .check-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .check-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 16px 16px 14px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.62);
}

.page-contact .check-list__mark {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-coral);
}

.page-contact .check-list strong {
  display: block;
  font-size: 15px;
  color: var(--c-ink);
}

.page-contact .check-list p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-dim);
}

/* ---------- 咨询类型切换 ---------- */
.page-contact .consult-tabs {
  margin-top: 26px;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--contact-line);
  border-radius: var(--radius-m);
  background: linear-gradient(200deg, var(--c-midnight), var(--c-deep));
  box-shadow: var(--shadow-1);
}

.page-contact .tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  clip-path: inset(50%);
  overflow: hidden;
}

.page-contact .tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .tab-pill {
  padding: 8px 16px;
  font-size: 14px;
  line-height: 1.3;
  color: var(--c-dim);
  border: 1px solid var(--contact-edge);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .tab-pill:hover {
  color: var(--c-ink);
  border-color: var(--contact-line);
}

.page-contact #consult-data:checked ~ .tab-bar label[for="consult-data"],
.page-contact #consult-app:checked ~ .tab-bar label[for="consult-app"],
.page-contact #consult-coop:checked ~ .tab-bar label[for="consult-coop"] {
  color: var(--c-deep);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  font-weight: 700;
}

.page-contact #consult-data:focus-visible ~ .tab-bar label[for="consult-data"],
.page-contact #consult-app:focus-visible ~ .tab-bar label[for="consult-app"],
.page-contact #consult-coop:focus-visible ~ .tab-bar label[for="consult-coop"] {
  outline: 2px solid var(--c-coral);
  outline-offset: 3px;
}

.page-contact .tab-panels {
  margin-top: 18px;
}

.page-contact .tab-panel {
  display: none;
  padding: 18px;
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.55);
  border: 1px dashed var(--contact-line);
}

.page-contact #consult-data:checked ~ .tab-panels .tab-panel[data-panel="data"],
.page-contact #consult-app:checked ~ .tab-panels .tab-panel[data-panel="app"],
.page-contact #consult-coop:checked ~ .tab-panels .tab-panel[data-panel="coop"] {
  display: block;
}

.page-contact .tab-panel__title {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--c-cyan-soft);
}

.page-contact .tab-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-ink);
}

/* ---------- 合作四类 ---------- */
.page-contact .coop-grid {
  margin-top: 24px;
}

.page-contact .coop-card {
  padding: 20px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-s);
  background: rgba(16, 46, 74, 0.48);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-contact .coop-card:hover {
  border-color: var(--contact-line);
  transform: translateY(-2px);
}

.page-contact .coop-card h3 {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-contact .coop-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-dim);
}

/* ---------- 侧边信息轨道 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 18px;
  align-content: start;
  min-width: 0;
}

.page-contact .rail-card {
  position: relative;
  padding: 22px 20px 22px 26px;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background: linear-gradient(190deg, var(--c-midnight), var(--c-deep));
  box-shadow: var(--shadow-1);
}

.page-contact .rail-card::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan), transparent 85%);
}

.page-contact .rail-card::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 12px var(--c-cyan);
}

.page-contact .rail-card--where::before {
  background: linear-gradient(180deg, var(--c-coral), transparent 85%);
}

.page-contact .rail-card--where::after {
  background: var(--c-coral);
  box-shadow: 0 0 12px var(--c-coral);
}

.page-contact .rail-card__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-dim);
}

.page-contact .rail-card h2 {
  margin: 8px 0 0;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
}

.page-contact .rail-card__big {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2rem);
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-contact .rail-card__big span {
  margin: 0 4px;
  color: var(--c-dim);
}

.page-contact .rail-card__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--c-dim);
}

.page-contact .rail-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .rail-list li {
  position: relative;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-ink);
}

.page-contact .rail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-cyan-soft);
}

.page-contact .rail-info {
  margin: 14px 0 0;
  display: grid;
  gap: 2px;
}

.page-contact .rail-info dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-dim);
}

.page-contact .rail-info dd {
  margin: 0 0 10px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

.page-contact .rail-info dd:last-child {
  margin-bottom: 0;
}

.page-contact .rail-info a {
  color: var(--c-cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(159, 255, 232, 0.35);
}

.page-contact .rail-info a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 答疑快捷入口 ---------- */
.page-contact .contact-faq__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-contact .contact-faq__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--contact-edge);
  border-radius: var(--radius-m);
  background: var(--c-midnight);
  overflow: hidden;
}

.page-contact .contact-faq__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
  opacity: 0.85;
}

.page-contact .contact-faq__media figcaption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  right: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan-soft);
}

.page-contact .contact-faq__content h2 {
  margin: 0;
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .contact-faq__lead {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-dim);
}

.page-contact .faq-links {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .faq-links a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 16px;
  text-decoration: none;
  border: 1px solid var(--contact-edge);
  border-left: 3px solid var(--c-cyan);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(16, 46, 74, 0.5);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .faq-links a:hover {
  background: rgba(56, 242, 208, 0.10);
  border-left-color: var(--c-coral);
}

.page-contact .faq-links__title {
  flex: 1 1 12em;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .faq-links__desc {
  flex: 0 1 auto;
  font-size: 13px;
  color: var(--c-dim);
}

.page-contact .faq-links a:hover .faq-links__title {
  color: var(--c-cyan-soft);
}

.page-contact .faq-links a:focus-visible,
.page-contact .rail-info a:focus-visible,
.page-contact .btn:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 3px;
}

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

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

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
  }

  .page-contact .contact-body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-contact .contact-faq__grid {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-rail {
    position: sticky;
    top: calc(var(--rail-w) + 24px);
  }

  .page-contact .contact-hero__media {
    transform: rotate(-1.6deg) translateY(-6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-hero__media,
  .page-contact .coop-card,
  .page-contact .tab-pill,
  .page-contact .faq-links a {
    transition: none;
    transform: none;
  }
}