.page-faq {
  --faq-media-bg: #13294A;
}

/* ========== Hero ========== */
.page-faq .faq-hero {
  background-color: var(--color-dark);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--color-white);
  padding: calc(var(--header-total) + 28px) 0 0;
  overflow: hidden;
}
.page-faq .faq-hero-frame {
  border: 1px solid var(--color-border-dark);
  background: rgba(255, 255, 255, 0.02);
  padding: 20px;
}
.page-faq .faq-hero-frame::before {
  content: "";
  display: block;
  height: 3px;
  margin: -20px -20px 24px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-teal) 100%);
}
.page-faq .faq-hero-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-bottom: 20px;
}
.page-faq .faq-hero .breadcrumbs a {
  color: rgba(255, 255, 255, 0.6);
}
.page-faq .faq-hero .breadcrumbs a:hover {
  color: var(--color-gold);
}
.page-faq .faq-hero .breadcrumbs [aria-current="page"] {
  color: var(--color-gold);
}
.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-faq .faq-hero-content h1 {
  font-family: var(--font-heading);
  font-size: 30px;
  line-height: 1.15;
  margin: 8px 0 12px;
  color: var(--color-white);
}
.page-faq .faq-hero-desc {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  max-width: 520px;
}
.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-faq .faq-hero .btn--ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-white);
}
.page-faq .faq-hero .btn--ghost:hover {
  background: var(--color-white);
  color: var(--color-dark);
}

/* ========== 通用媒体框 ========== */
.page-faq .faq-media {
  position: relative;
  line-height: 0;
  background: var(--faq-media-bg);
  border: 1px solid var(--color-border-dark);
}
.page-faq .faq-media::before,
.page-faq .faq-media::after {
  content: "";
  position: absolute;
  z-index: 1;
  width: 16px;
  height: 16px;
}
.page-faq .faq-media::before {
  top: 0;
  left: 0;
  background: var(--color-gold);
}
.page-faq .faq-media::after {
  right: 0;
  bottom: 0;
  background: var(--color-teal);
}
.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  position: relative;
}
.page-faq .faq-hero-media {
  margin: 24px -20px -20px;
}

/* ========== 热门问题 ========== */
.page-faq .faq-hot {
  background: var(--color-bg-light);
  padding: 56px 0 64px;
}
.page-faq .faq-section-head {
  margin-bottom: 28px;
}
.page-faq .faq-section-head h2 {
  font-size: 28px;
  font-family: var(--font-heading);
  color: var(--color-dark);
  margin: 4px 0 0;
}
.page-faq .faq-section-desc {
  color: var(--color-text-secondary);
  font-size: 14px;
  margin: 10px 0 0;
  max-width: 480px;
}
.page-faq .faq-hot-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

/* ========== 手风琴问题卡片 ========== */
.page-faq .faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-teal);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.page-faq .faq-item[open] {
  border-left-color: var(--color-gold);
  box-shadow: 0 6px 16px rgba(11, 31, 58, 0.08);
}
.page-faq .faq-item-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.4;
}
.page-faq .faq-item-head::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item-title {
  flex: 1;
}
.page-faq .faq-item-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gold);
  min-width: 28px;
}
.page-faq .faq-item-tag {
  flex: 0 0 auto;
}
.page-faq .faq-item-icon {
  flex: 0 0 auto;
  width: 18px;
  text-align: center;
  color: var(--color-gold);
  font-size: 18px;
  line-height: 1;
}
.page-faq .faq-item-icon::before {
  content: "+";
}
.page-faq .faq-item[open] .faq-item-icon::before {
  content: "−";
}
.page-faq .faq-item-head:hover {
  background: rgba(240, 180, 41, 0.04);
}
.page-faq .faq-item-body {
  padding: 0 16px 16px 54px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}
.page-faq .faq-item-body p {
  margin: 0 0 8px;
}
.page-faq .faq-item-body a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-item-body a:hover {
  color: var(--color-gold-dark);
}
.page-faq .faq-hot-item:first-child {
  background: linear-gradient(180deg, rgba(240, 180, 41, 0.06) 0%, rgba(255, 255, 255, 0) 40%), var(--color-white);
}

/* ========== 分类浏览 ========== */
.page-faq .faq-categories {
  background: var(--color-white);
  padding: 56px 0 64px;
}
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-faq .faq-cat-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.page-faq .faq-sidebar h2 {
  font-size: 20px;
  font-family: var(--font-heading);
  color: var(--color-dark);
  margin: 0 0 4px;
}
.page-faq .faq-sidebar-hint {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
}
.page-faq .faq-sidebar-list {
  display: grid;
  gap: 8px;
}
.page-faq .faq-cat-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-left: 3px solid transparent;
  cursor: pointer;
  color: var(--color-dark);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.page-faq .faq-cat-label:hover {
  border-color: var(--color-teal);
  border-left-color: var(--color-teal);
}
.page-faq .faq-cat-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
}
.page-faq #faq-cat-all:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-all"],
.page-faq #faq-cat-download:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-download"],
.page-faq #faq-cat-version:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-version"],
.page-faq #faq-cat-favorite:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-favorite"],
.page-faq #faq-cat-device:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-device"] {
  background: var(--color-dark);
  border-color: var(--color-dark);
  border-left-color: var(--color-gold);
  color: var(--color-white);
}
.page-faq #faq-cat-all:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-all"] .faq-cat-count,
.page-faq #faq-cat-download:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-download"] .faq-cat-count,
.page-faq #faq-cat-version:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-version"] .faq-cat-count,
.page-faq #faq-cat-favorite:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-favorite"] .faq-cat-count,
.page-faq #faq-cat-device:checked ~ .faq-sidebar .faq-cat-label[for="faq-cat-device"] .faq-cat-count {
  color: var(--color-gold);
}
.page-faq #faq-cat-all:focus-visible ~ .faq-sidebar label[for="faq-cat-all"],
.page-faq #faq-cat-download:focus-visible ~ .faq-sidebar label[for="faq-cat-download"],
.page-faq #faq-cat-version:focus-visible ~ .faq-sidebar label[for="faq-cat-version"],
.page-faq #faq-cat-favorite:focus-visible ~ .faq-sidebar label[for="faq-cat-favorite"],
.page-faq #faq-cat-device:focus-visible ~ .faq-sidebar label[for="faq-cat-device"] {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}
.page-faq #faq-cat-download:checked ~ .faq-questions .faq-item:not([data-category="download"]),
.page-faq #faq-cat-version:checked ~ .faq-questions .faq-item:not([data-category="version"]),
.page-faq #faq-cat-favorite:checked ~ .faq-questions .faq-item:not([data-category="favorite"]),
.page-faq #faq-cat-device:checked ~ .faq-questions .faq-item:not([data-category="device"]) {
  display: none;
}
.page-faq .faq-sidebar-status {
  margin-top: 20px;
  padding: 14px;
  background: var(--color-bg-light);
  border: 1px dashed var(--color-border);
  display: grid;
  gap: 6px;
}
.page-faq .faq-sidebar-status-line {
  margin: 0;
  font-size: 12px;
  color: var(--color-text-secondary);
}
.page-faq .faq-sidebar-status-line .mono {
  color: var(--color-teal);
  margin-right: 8px;
}
.page-faq .faq-sidebar-links {
  margin-top: 20px;
  display: grid;
  gap: 8px;
}
.page-faq .faq-sidebar-links a {
  font-size: 14px;
  color: var(--color-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-sidebar-links a:hover {
  color: var(--color-gold-dark);
}
.page-faq .faq-questions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-content: start;
}

/* ========== 联系支持 ========== */
.page-faq .faq-support {
  background-color: var(--color-dark-deep);
  background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0, rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 8px);
  color: var(--color-white);
  padding: 56px 0 64px;
}
.page-faq .faq-support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-faq .faq-support-content h2 {
  font-size: 28px;
  font-family: var(--font-heading);
  color: var(--color-white);
  margin: 4px 0 0;
}
.page-faq .faq-support-intro {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  margin: 12px 0 0;
}
.page-faq .faq-contact-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border-dark);
}
.page-faq .faq-contact-list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border-dark);
  font-size: 15px;
}
.page-faq .faq-contact-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gold);
  min-width: 48px;
}
.page-faq .faq-contact-list a {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-contact-list a:hover {
  color: var(--color-gold);
}
.page-faq .faq-support-note {
  border-left: 3px solid var(--color-teal);
  padding-left: 14px;
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
}
.page-faq .faq-support-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-faq .faq-support .btn--ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-white);
}
.page-faq .faq-support .btn--ghost:hover {
  background: var(--color-white);
  color: var(--color-dark);
}
.page-faq .faq-support-media {
  align-self: center;
}

/* ========== 响应式 ========== */
@media (min-width: 700px) {
  .page-faq .faq-hot-list {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .page-faq .faq-hot-item:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 800px) {
  .page-faq .faq-hero-content h1 {
    font-size: 40px;
  }
  .page-faq .faq-hero-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: 40px;
  }
  .page-faq .faq-support-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: start;
  }
  .page-faq .faq-sidebar {
    position: sticky;
    top: calc(var(--header-total) + 16px);
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero-content h1 {
    font-size: 28px;
  }
  .page-faq .faq-hero-media {
    margin-bottom: -20px;
  }
  .page-faq .faq-item-tag {
    display: none;
  }
  .page-faq .faq-item-body {
    padding-left: 16px;
  }
  .page-faq .faq-item-icon {
    width: 16px;
  }
}