.page-faq {
  --faq-line: rgba(11, 27, 58, 0.12);
  --faq-line-strong: rgba(11, 27, 58, 0.22);
  --faq-card: rgba(255, 255, 255, 0.74);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* 首屏封面 */
.page-faq .faq-hero {
  margin-top: 1.15rem;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border-radius: var(--r-xl);
  color: var(--paper);
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 88% 4%, rgba(123, 97, 255, 0.38), transparent 62%),
    radial-gradient(90% 70% at 4% 102%, rgba(200, 255, 77, 0.16), transparent 64%),
    linear-gradient(158deg, var(--deep) 0%, #060a15 84%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
}

.page-faq .faq-hero__title {
  margin: 0.65rem 0 0;
  color: var(--paper);
}

.page-faq .faq-hero__title em {
  display: block;
  font-style: normal;
  color: var(--lime);
}

.page-faq .faq-hero__lede {
  margin-top: 1.15rem;
  max-width: 34em;
  color: rgba(245, 242, 233, 0.78);
}

.page-faq .faq-hero__panel {
  padding: 1.15rem 1.3rem;
  border: 1px solid rgba(200, 255, 77, 0.26);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.045);
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 0.5rem;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: rgba(245, 242, 233, 0.6);
}

.page-faq .faq-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(245, 242, 233, 0.13);
}

.page-faq .faq-stat:last-child {
  border-bottom: 0;
  padding-bottom: 0.2rem;
}

.page-faq .faq-stat__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.2rem, 4.4vw, 1.7rem);
  line-height: 1.1;
  color: var(--lime);
}

.page-faq .faq-stat__label {
  font-size: 0.8rem;
  text-align: right;
  color: rgba(245, 242, 233, 0.68);
}

.page-faq .faq-hero__media {
  margin: clamp(1.5rem, 4vw, 2.3rem) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* 分类索引 */
.page-faq .faq-jump {
  margin-top: clamp(1.5rem, 4vw, 2.4rem);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--pill);
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
  font-size: 0.86rem;
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}

.page-faq .faq-jump__link span {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.76rem;
  color: var(--stone);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 122, 51, 0.1);
  transform: translateY(-2px);
}

/* 章节 */
.page-faq .faq-section {
  margin-top: clamp(2.6rem, 7vw, 4.6rem);
  scroll-margin-top: 4.5rem;
}

.page-faq .faq-section__head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .faq-section__tag {
  color: var(--moss);
}

.page-faq .faq-section__title {
  margin: 0;
  color: var(--ink);
}

.page-faq .faq-section__note {
  margin: 0;
  max-width: 36em;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--body-soft);
}

/* 问答折叠 */
.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-list--tight {
  margin-top: 1.1rem;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--r-lg);
  background: var(--faq-card);
  transition: border-color var(--t-base) var(--ease),
    background var(--t-base) var(--ease),
    box-shadow var(--t-base) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(255, 122, 51, 0.5);
}

.page-faq .faq-item[open] {
  border-color: rgba(200, 255, 77, 0.85);
  background: linear-gradient(180deg, rgba(200, 255, 77, 0.12), rgba(255, 255, 255, 0.62));
  box-shadow: 0 20px 42px -30px rgba(11, 27, 58, 0.6);
}

.page-faq .faq-item__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__sum:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: var(--r-lg);
}

.page-faq .faq-item__num {
  min-width: 2.35rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.35rem, 5.4vw, 1.9rem);
  line-height: 1;
  color: rgba(11, 27, 58, 0.24);
  transition: color var(--t-base) var(--ease);
}

.page-faq .faq-item__sum:hover .faq-item__num {
  color: var(--orange);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--clay);
}

.page-faq .faq-item__q {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--faq-line-strong);
  border-radius: var(--pill);
  transition: border-color var(--t-base) var(--ease),
    background var(--t-base) var(--ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--deep);
  transform: translate(-50%, -50%);
  transition: transform var(--t-base) var(--ease),
    background var(--t-base) var(--ease);
}

.page-faq .faq-item__icon::before {
  width: 11px;
  height: 1.6px;
}

.page-faq .faq-item__icon::after {
  width: 1.6px;
  height: 11px;
}

.page-faq .faq-item[open] .faq-item__icon {
  border-color: var(--deep);
  background: var(--lime);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0.9rem 1.05rem 1.35rem;
  border-top: 1px solid rgba(11, 27, 58, 0.08);
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--body-text);
}

.page-faq .faq-link {
  color: var(--deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-link:hover {
  color: var(--orange);
}

/* 版本对照展签 */
.page-faq .faq-versions {
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-versions .placard {
  border-radius: var(--r-lg);
}

.page-faq .faq-versions__card {
  border-left: 3px solid var(--moss);
}

.page-faq .faq-versions__card--violet {
  border-left-color: var(--violet);
}

.page-faq .faq-versions__card--clay {
  border-left-color: var(--clay);
}

.page-faq .faq-versions__card .placard__title {
  color: var(--ink);
}

/* 联系区块 */
.page-faq .faq-contact {
  margin-top: clamp(2.8rem, 7vw, 4.6rem);
  padding: clamp(1.6rem, 5vw, 3.2rem);
  border-radius: var(--r-xl);
  color: var(--paper);
  overflow: hidden;
  background:
    radial-gradient(100% 90% at 92% 0%, rgba(123, 97, 255, 0.34), transparent 60%),
    linear-gradient(160deg, var(--deep) 0%, #070d1b 86%);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-faq .faq-contact__title {
  margin: 0.6rem 0 0;
  color: var(--paper);
}

.page-faq .faq-contact__note {
  margin: 1rem 0 0;
  max-width: 34em;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(245, 242, 233, 0.76);
}

.page-faq .faq-chips {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-faq .faq-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.22rem;
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 1px solid rgba(245, 242, 233, 0.22);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.05);
  color: var(--paper);
  font-family: var(--font-sans);
  text-align: left;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: rgba(200, 255, 77, 0.72);
  background: rgba(200, 255, 77, 0.09);
  transform: translateY(-2px);
}

.page-faq .faq-chip .copy-chip__key {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: rgba(245, 242, 233, 0.58);
}

.page-faq .faq-chip .copy-chip__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(0.92rem, 3.6vw, 1.14rem);
  color: var(--lime);
  word-break: break-all;
}

.page-faq .faq-chip .copy-chip__hint {
  font-size: 0.7rem;
  color: var(--orange);
}

.page-faq .faq-contact__meta {
  margin: 1.2rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(245, 242, 233, 0.6);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem 1.3rem;
  margin: 1.4rem 0 0;
}

.page-faq .faq-link--dark {
  color: var(--lime);
}

.page-faq .faq-link--dark:hover {
  color: var(--orange);
}

.page-faq .faq-contact__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.page-faq .faq-contact__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* 响应式 */
@media (min-width: 560px) {
  .page-faq .faq-chips {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-faq .faq-item__sum {
    grid-template-columns: 3.6rem minmax(0, 1fr) 30px;
    gap: 0.85rem;
    padding: 1.25rem 1.4rem;
  }

  .page-faq .faq-item__num {
    min-width: 0;
    font-size: clamp(1.7rem, 3vw, 2.2rem);
  }

  .page-faq .faq-item__q {
    font-size: 1.06rem;
  }

  .page-faq .faq-item__body {
    padding: 1rem 1.4rem 1.5rem 5.85rem;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-section__head {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    grid-template-areas:
      "tag tag"
      "title note";
    column-gap: 2.5rem;
  }

  .page-faq .faq-section__tag {
    grid-area: tag;
  }

  .page-faq .faq-section__title {
    grid-area: title;
  }

  .page-faq .faq-section__note {
    grid-area: note;
    align-self: end;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }
}