.page-faq {
  --faq-radius: 14px;
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.page-faq .ya-container {
  max-width: var(--container-max);
  padding-inline: var(--container-pad);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0 40px;
}

.page-faq .faq-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.page-faq .faq-hero-copy h1 {
  font-size: clamp(30px, 6vw, 46px);
  line-height: 1.1;
  margin: 18px 0 14px;
}

.page-faq .faq-hero-lead {
  color: var(--color-text-secondary);
  font-size: 17px;
  line-height: 1.8;
  max-width: 560px;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-hero-media {
  flex-shrink: 0;
}

.page-faq .faq-hero-img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--faq-radius);
  box-shadow: var(--shadow-md);
}

/* ============ 常见问题 ============ */
.page-faq .faq-section {
  background: var(--color-surface);
  padding: 56px 0 72px;
}

.page-faq .faq-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-faq .faq-section-head {
  flex-basis: 100%;
  margin-bottom: 8px;
}

.page-faq .faq-section-head h2 {
  font-size: 30px;
  line-height: 1.2;
  margin: 8px 0 6px;
}

.page-faq .faq-section-head p:last-child {
  color: var(--color-text-secondary);
}

.page-faq .faq-skip-contact {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-filter-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-filter-btn {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14px;
  line-height: 1.4;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.page-faq .faq-filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.page-faq #faq-all:checked + label[for="faq-all"],
.page-faq #faq-account:checked + label[for="faq-account"],
.page-faq #faq-data:checked + label[for="faq-data"],
.page-faq #faq-offline:checked + label[for="faq-offline"],
.page-faq #faq-legacy:checked + label[for="faq-legacy"],
.page-faq #faq-contact:checked + label[for="faq-contact"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.page-faq .faq-filter-input:focus-visible + .faq-filter-btn {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.page-faq .faq-questions {
  flex-basis: 100%;
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-question {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.page-faq #faq-account:checked ~ .faq-questions .faq-question:not([data-cat="account"]),
.page-faq #faq-data:checked ~ .faq-questions .faq-question:not([data-cat="data"]),
.page-faq #faq-offline:checked ~ .faq-questions .faq-question:not([data-cat="offline"]),
.page-faq #faq-legacy:checked ~ .faq-questions .faq-question:not([data-cat="legacy"]),
.page-faq #faq-contact:checked ~ .faq-questions .faq-question:not([data-cat="contact"]) {
  display: none;
}

.page-faq .faq-question[open] {
  box-shadow: var(--shadow-sm);
  border-color: rgba(255, 107, 53, 0.35);
}

.page-faq .faq-question summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text);
  transition: background var(--transition);
  user-select: none;
}

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

.page-faq .faq-question summary:hover {
  background: #F9FAFB;
}

.page-faq .faq-q-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.page-faq .faq-question[open] .faq-q-mark {
  background: var(--color-accent);
  color: #fff;
}

.page-faq .faq-question summary::after {
  content: "+";
  margin-left: auto;
  font-size: 22px;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.page-faq .faq-question[open] summary::after {
  content: "–";
}

.page-faq .faq-a {
  padding: 4px 20px 18px 62px;
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-a a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq .faq-question[open] .faq-a {
  animation: pageFaqFade 0.3s ease;
}

/* ============ 使用指南 ============ */
.page-faq .faq-guide {
  background: var(--color-primary);
  padding: 64px 0;
  color: #fff;
}

.page-faq .faq-guide .faq-section-head {
  margin-bottom: 24px;
}

.page-faq .faq-guide .faq-section-head h2 {
  color: #fff;
}

.page-faq .faq-guide .faq-section-head p:last-child {
  color: rgba(255, 255, 255, 0.7);
}

.page-faq .faq-guide .ya-data-label {
  color: var(--color-accent);
}

.page-faq .faq-guide-grid {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-faq .faq-step {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--faq-radius);
  padding: 24px;
  transition: transform var(--transition), background var(--transition);
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.11);
}

.page-faq .faq-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 16px;
}

.page-faq .faq-step h3 {
  color: #fff;
  font-size: 20px;
  margin: 0 0 10px;
}

.page-faq .faq-step p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 18px;
}

.page-faq .faq-step .ya-btn-outline {
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}

.page-faq .faq-step .ya-btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}

.page-faq .faq-guide-media {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-faq .faq-guide-img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border-radius: var(--faq-radius);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.28);
}

/* ============ 联系支持 ============ */
.page-faq .faq-contact {
  background: var(--color-bg);
  padding: 64px 0;
}

.page-faq .faq-contact-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 62%, var(--color-accent) 160%);
  border-radius: 20px;
  padding: 40px 24px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-contact-card::before {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 200px;
  height: 200px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.page-faq .faq-contact-card::after {
  content: "";
  position: absolute;
  right: 24px;
  bottom: -48px;
  width: 140px;
  height: 140px;
  background: rgba(255, 107, 53, 0.22);
  border-radius: 50%;
}

.page-faq .faq-contact-info {
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact-info .ya-data-label {
  color: var(--color-accent);
}

.page-faq .faq-contact-info h2 {
  color: #fff;
  font-size: 30px;
  margin: 8px 0 12px;
}

.page-faq .faq-contact-info p {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 20px 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact-list li {
  padding-left: 28px;
  position: relative;
  color: rgba(255, 255, 255, 0.92);
  font-size: 15px;
  line-height: 1.6;
}

.page-faq .faq-contact-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.page-faq .faq-contact-btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 26px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  transition: background var(--transition), transform var(--transition);
}

.page-faq .faq-contact-btn:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
}

@keyframes pageFaqFade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 响应式 ============ */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 64px 0 56px;
  }

  .page-faq .faq-hero-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }

  .page-faq .faq-hero-copy {
    flex: 1 1 55%;
  }

  .page-faq .faq-hero-media {
    flex: 0 1 45%;
  }

  .page-faq .faq-hero-img {
    margin-left: auto;
  }

  .page-faq .faq-panel {
    gap: 12px;
  }

  .page-faq .faq-questions {
    gap: 14px;
    max-width: 920px;
  }

  .page-faq .faq-question summary {
    padding: 18px 22px;
    font-size: 17px;
  }

  .page-faq .faq-a {
    padding: 6px 22px 20px 66px;
  }

  .page-faq .faq-guide {
    padding: 80px 0;
  }

  .page-faq .faq-contact-card {
    padding: 56px 48px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-guide-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
}