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

/* ===== Hero ===== */
.faq-hero {
  position: relative;
  padding: 24px 20px 0;
  border-bottom: 1px solid var(--color-divider);
  background:
    linear-gradient(160deg, rgba(0, 229, 168, 0.06) 0%, transparent 42%),
    linear-gradient(200deg, rgba(0, 184, 217, 0.05) 0%, transparent 55%),
    var(--color-secondary-bg);
}

.faq-hero__breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto 22px;
}

.faq-hero__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  gap: 20px;
  align-items: end;
  padding-bottom: 36px;
}

.faq-hero__copy {
  max-width: 720px;
}

.faq-hero h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-text-primary);
}

.faq-h1__slash {
  margin: 0 0.2em;
  color: var(--color-accent);
  font-weight: 400;
}

.faq-hero__lead {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 66ch;
}

.faq-hero__meta {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-left: 2px solid var(--color-accent);
  background: var(--color-surface-glass);
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 560px;
}

.faq-hero__meta-text {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.faq-hero__media {
  margin: 0;
}

.faq-hero__media img,
.faq-device-panel__media img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== Frame & Layout ===== */
.faq-frame {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 28px 20px 80px;
}

.faq-layout {
  display: grid;
  gap: 28px;
}

/* ===== FAQ Index ===== */
.faq-index {
  position: sticky;
  top: var(--header-height);
  z-index: 20;
  margin: 0 -20px;
  padding: 12px 20px 14px;
  background: var(--color-secondary-glass);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.faq-index__title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 10px;
}

.faq-index__title-en {
  font-size: 12px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.faq-index__title-cn {
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-divider) transparent;
  padding-bottom: 2px;
}

.faq-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--color-divider);
  background: var(--color-surface);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-index__list a:hover {
  background: var(--color-surface-highlight);
  border-color: var(--color-accent);
}

.faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 400;
}

.faq-index__tip {
  display: none;
}

/* ===== Sections ===== */
.faq-content {
  min-width: 0;
}

.faq-section {
  scroll-margin-top: calc(var(--header-height) + 24px);
  padding: 28px 0 8px;
  border-top: 1px solid var(--color-divider);
}

.faq-section:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.faq-section:target {
  background: linear-gradient(90deg, rgba(0, 229, 168, 0.06) 0%, transparent 70%);
  border-radius: var(--radius);
  padding-left: 12px;
  padding-right: 12px;
  margin-left: -12px;
  margin-right: -12px;
}

.faq-section__header {
  margin-bottom: 8px;
}

.faq-section__header .section__title {
  color: var(--color-text-primary);
}

.faq-section__more {
  margin: 18px 0 0;
  padding-left: 32px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.faq-section__more a {
  color: var(--color-accent);
  text-decoration: none;
}

.faq-section__more a:hover {
  text-decoration: underline;
}

/* ===== FAQ Item ===== */
.faq-item {
  position: relative;
  margin-top: 20px;
  padding: 20px 0 22px 14px;
  border-bottom: 1px solid var(--color-divider);
}

.faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-alt) 70%, transparent 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.faq-item:hover::before,
.faq-item:focus-within::before {
  opacity: 1;
}

.faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.faq-item__num {
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 400;
  flex-shrink: 0;
  letter-spacing: 0.04em;
}

.faq-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-text-primary);
}

.faq-item__a {
  margin: 12px 0 0;
  padding-left: 32px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-secondary);
  max-width: 74ch;
}

.faq-item__a a {
  color: var(--color-accent);
  text-decoration: none;
}

.faq-item__a a:hover {
  text-decoration: underline;
}

/* ===== Device Panel ===== */
.faq-device-panel {
  display: grid;
  gap: 20px;
  margin-top: 22px;
  padding: 20px;
  background: var(--color-secondary-glass);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius);
}

.faq-device-panel__copy h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.faq-device-panel__copy p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 74ch;
}

.faq-device-panel__note {
  font-size: 12px;
  color: var(--color-accent-alt);
  margin: 6px 0 0;
}

.faq-device-panel__media {
  margin: 0;
}

.faq-device-panel__media img {
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* ===== Support Strip ===== */
.faq-support-strip {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding: 22px;
  background: var(--color-surface-glass);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius);
}

.faq-support-strip__item {
  display: grid;
  gap: 4px;
}

.faq-support-strip__label {
  font-size: 11px;
  color: var(--color-accent);
  letter-spacing: 0.1em;
}

.faq-support-strip__value {
  font-size: 15px;
  color: var(--color-text-primary);
  word-break: break-all;
}

.faq-support-strip__link {
  justify-self: start;
  margin-top: 6px;
  padding: 10px 16px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-accent);
  text-decoration: none;
  font-size: 13px;
  transition: background 0.25s ease, color 0.25s ease;
}

.faq-support-strip__link span {
  margin-left: 8px;
  font-size: 12px;
}

.faq-support-strip__link:hover {
  background: rgba(0, 229, 168, 0.12);
  color: var(--color-text-primary);
}

/* ===== Reveal motion ===== */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.page-faq [data-revealed="true"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .faq-index__list a,
  .faq-support-strip__link {
    transition: none;
  }
}

/* ===== Tablet ===== */
@media (min-width: 720px) {
  .faq-hero {
    padding: 32px 28px 0;
  }

  .faq-hero__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 32px;
    align-items: center;
  }

  .faq-frame {
    padding: 40px 28px 88px;
  }

  .faq-index {
    margin: 0;
    border-radius: var(--radius);
  }

  .faq-device-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .faq-support-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .faq-support-strip__link {
    grid-column: 1 / -1;
    justify-self: start;
  }
}

/* ===== Desktop ===== */
@media (min-width: 960px) {
  .faq-frame {
    padding: 52px 40px 104px;
  }

  .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .faq-index {
    position: sticky;
    top: calc(var(--header-height) + 28px);
    background: transparent;
    backdrop-filter: none;
    border: 0;
    padding: 0;
    display: block;
  }

  .faq-index__title {
    margin-bottom: 18px;
    flex-direction: column;
    gap: 4px;
  }

  .faq-index__title-en {
    font-size: 12px;
  }

  .faq-index__title-cn {
    font-size: 14px;
    color: var(--color-text-primary);
    font-weight: 700;
  }

  .faq-index__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    overflow: visible;
    border-left: 1px solid var(--color-divider);
    padding-left: 22px;
  }

  .faq-index__list a {
    border: 0;
    background: transparent;
    border-radius: 0;
    padding: 10px 12px;
    margin-left: -23px;
    border-left: 2px solid transparent;
    white-space: normal;
    color: var(--color-text-secondary);
  }

  .faq-index__list a:hover {
    background: linear-gradient(90deg, rgba(0, 229, 168, 0.1) 0%, transparent 90%);
    border-left-color: var(--color-accent);
    color: var(--color-text-primary);
  }

  .faq-index__tip {
    display: block;
    margin: 22px 0 0;
    padding-left: 8px;
    font-size: 12px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 26ch;
  }

  .faq-section {
    padding-top: 36px;
    margin-top: 0;
  }

  .faq-section:first-of-type {
    padding-top: 0;
  }

  .faq-section:target {
    padding-left: 24px;
    padding-right: 24px;
    margin-left: -24px;
    margin-right: -24px;
  }

  .faq-item h3 {
    font-size: 18px;
  }
}