.page-faq {
  --faq-note-w: 240px;
  --faq-hair: rgba(30, 59, 44, 0.85);
  --faq-panel: rgba(20, 48, 37, 0.62);
  --faq-panel-strong: rgba(20, 48, 37, 0.94);
  background: var(--turf);
  color: var(--white);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(44px, 8vw, 92px)) 0 clamp(36px, 5.5vw, 68px);
  background:
    radial-gradient(130% 95% at 84% -10%, rgba(201, 255, 61, 0.11), transparent 60%),
    radial-gradient(90% 70% at 6% 110%, rgba(94, 216, 255, 0.07), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--turf) 100%);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(243, 255, 224, 0.03) 0 1px, transparent 1px 68px);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-cond);
  font-size: clamp(31px, 5.4vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.03em;
  max-width: 15em;
  overflow-wrap: anywhere;
}

.page-faq .faq-hero-lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 42ch;
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-faq .faq-hero-index {
  position: relative;
  padding: 20px 22px 22px;
  background: linear-gradient(158deg, rgba(20, 48, 37, 0.92), rgba(6, 10, 8, 0.78));
  border-left: 2px solid var(--acid);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-cond);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--acid);
}

.page-faq .faq-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 8px 11px 10px;
  border-bottom: 1px solid rgba(30, 59, 44, 0.7);
  color: var(--text-soft);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.55;
  transition: color 0.2s ease, background-color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-index-item:last-child a {
  border-bottom: 0;
}

.page-faq .faq-index-item a:hover,
.page-faq .faq-index-item a:focus-visible {
  color: var(--acid);
  background: rgba(201, 255, 61, 0.07);
  padding-left: 15px;
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--acid);
}

/* ---------- 分区骨架 ---------- */

.page-faq .faq-section {
  padding: clamp(46px, 7vw, 86px) 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-section-head {
  display: grid;
  gap: 10px;
  max-width: 720px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-section-head .section-lead {
  margin: 0;
  max-width: 54ch;
  color: var(--text-soft);
}

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-split-list {
  min-width: 0;
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-split-list {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-faq .faq-item {
  position: relative;
  background: linear-gradient(180deg, var(--faq-panel), rgba(11, 18, 14, 0.55));
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: background 0.25s ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 22px;
  height: 1px;
  background: var(--acid);
  transform: rotate(-45deg);
  transform-origin: right top;
  opacity: 0.32;
  transition: opacity 0.25s ease;
}

.page-faq .faq-item[open],
.page-faq .faq-item:hover {
  background: linear-gradient(180deg, var(--faq-panel-strong), rgba(11, 18, 14, 0.7));
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-cond);
  font-size: clamp(16px, 1.9vw, 20px);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.45;
  color: var(--white);
  transition: color 0.2s ease;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: -2px;
}

.page-faq .faq-q-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--moss);
  transition: color 0.2s ease;
}

.page-faq .faq-item[open] .faq-q-num,
.page-faq .faq-item:hover .faq-q-num {
  color: var(--acid);
}

.page-faq .faq-item[open] .faq-q-text {
  color: var(--acid);
}

.page-faq .faq-q-mark {
  position: relative;
  width: 16px;
  height: 16px;
  align-self: center;
  flex: none;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--moss);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.page-faq .faq-q-mark::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-q-mark::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-q-mark::before {
  background: var(--acid);
}

.page-faq .faq-item[open] .faq-q-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  background: var(--acid);
}

.page-faq .faq-a {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 30px);
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px) clamp(22px, 2.8vw, 30px);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-a-main {
  min-width: 0;
  max-width: 48ch;
  font-family: var(--font-sans);
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-faq .faq-a-main p {
  margin: 0 0 10px;
}

.page-faq .faq-a-main p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a-note {
  min-width: 0;
}

.page-faq .faq-note-label {
  margin: 0 0 6px;
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--acid);
  opacity: 0.85;
}

.page-faq .faq-a-note p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 影像 ---------- */

.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06) brightness(0.94);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .media-caption {
  margin-top: 10px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--moss);
}

.page-faq .faq-figure-wide {
  margin: clamp(30px, 4.5vw, 52px) 0 0;
}

.page-faq .faq-figure-wide img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.88) contrast(1.05);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

/* ---------- 术语速查 ---------- */

.page-faq .faq-terms {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  background: rgba(30, 59, 44, 0.6);
}

.page-faq .term {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--turf);
  transition: background-color 0.25s ease;
}

.page-faq .term:hover {
  background: var(--faq-panel-strong);
}

.page-faq .term-name {
  margin: 0 0 8px;
  font-family: var(--font-cond);
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--acid);
  transition: text-shadow 0.25s ease;
}

.page-faq .term:hover .term-name {
  text-shadow: 0 0 20px rgba(201, 255, 61, 0.45);
}

.page-faq .term-def {
  margin: 0;
  max-width: 42ch;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------- 延伸入口 ---------- */

.page-faq .faq-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-faq .faq-next-item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border-left: 2px solid var(--edge);
  background: rgba(20, 48, 37, 0.55);
  text-decoration: none;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-faq .faq-next-item:hover,
.page-faq .faq-next-item:focus-visible {
  border-left-color: var(--acid);
  background: var(--faq-panel-strong);
}

.page-faq .faq-next-label {
  font-family: var(--font-cond);
  font-size: 15px;
  letter-spacing: 0.09em;
  color: var(--white);
  transition: color 0.25s ease;
}

.page-faq .faq-next-item:hover .faq-next-label,
.page-faq .faq-next-item:focus-visible .faq-next-label {
  color: var(--acid);
}

.page-faq .faq-next-desc {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--moss);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-terms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-faq .faq-a {
    grid-template-columns: minmax(0, 1fr) var(--faq-note-w);
    align-items: start;
  }

  .page-faq .faq-a-note {
    border-left: 2px solid rgba(201, 255, 61, 0.35);
    padding-left: 16px;
  }
}

@media (min-width: 1020px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 336px);
    align-items: start;
  }

  .page-faq .faq-split-aside {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-faq .faq-q {
    grid-template-columns: auto minmax(0, 1fr);
    row-gap: 8px;
  }

  .page-faq .faq-q-mark {
    grid-column: 1 / -1;
    justify-self: start;
    align-self: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-q,
  .page-faq .faq-q-num,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-index-item a,
  .page-faq .term,
  .page-faq .term-name,
  .page-faq .faq-next-item,
  .page-faq .faq-next-label {
    transition: none;
  }
}