.page-faq {
  background: var(--ink);
  color: var(--ice);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(86px, 11vw, 148px) 0 clamp(40px, 5vw, 68px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -12% -18% auto -18%;
  height: 160%;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(58% 54% at 76% 20%, rgba(47, 123, 255, 0.28), transparent 68%),
    radial-gradient(44% 44% at 12% 80%, rgba(60, 242, 212, 0.15), transparent 70%),
    radial-gradient(34% 34% at 94% 84%, rgba(255, 62, 157, 0.13), transparent 70%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  top: 4%;
  width: 48%;
  aspect-ratio: 1 / 1;
  z-index: -1;
  pointer-events: none;
  opacity: 0.55;
  clip-path: polygon(30% 0, 100% 0, 100% 70%, 0 100%);
  background: linear-gradient(142deg, rgba(47, 123, 255, 0.38), rgba(11, 59, 70, 0.04) 72%);
}

.page-faq .crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.07em;
  color: var(--mist);
}

.page-faq .crumb-item + .crumb-item::before {
  content: "/";
  margin: 0 10px;
  color: var(--steel);
}

.page-faq .crumb-link {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .crumb-link[aria-current="page"] {
  color: var(--cyan);
}

.page-faq .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 26px 0 0;
  padding: 7px 15px 7px 11px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  background: rgba(13, 20, 36, 0.74);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .hero-kicker .mono {
  font-family: var(--font-mono);
  color: var(--ice);
}

.page-faq .hero-pulse {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(60, 242, 212, 0.55);
  animation: faq-pulse 2.4s ease-out infinite;
}

@keyframes faq-pulse {
  0% { box-shadow: 0 0 0 0 rgba(60, 242, 212, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(60, 242, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(60, 242, 212, 0); }
}

.page-faq .hero-title {
  margin: 22px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(31px, 6.2vw, 74px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-faq .hero-title-accent {
  display: block;
  margin-top: 6px;
  transform: skewX(-4deg);
  transform-origin: left center;
  background: linear-gradient(96deg, var(--cyan) 0%, var(--blue) 58%, var(--magenta) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq .hero-lede {
  margin: 24px 0 0;
  max-width: 60ch;
  font-size: clamp(14.5px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .hero-stats {
  list-style: none;
  margin: 34px 0 0;
  padding: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  border-top: 1px solid var(--steel);
}

.page-faq .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-faq .hs-val {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(19px, 2.6vw, 27px);
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-faq .hero-stat:first-child .hs-val {
  color: var(--cyan);
}

.page-faq .hs-label {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-bottom: clamp(64px, 8vw, 112px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--steel);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(13, 20, 36, 0.94), rgba(6, 8, 15, 0.9));
  padding: 16px 14px 18px;
}

.page-faq .idx-board {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--steel);
}

.page-faq .idx-title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ice);
}

.page-faq .idx-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .idx-count .mono {
  color: var(--cyan);
}

.page-faq .idx-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .idx-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-m);
  text-decoration: none;
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.5;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .idx-link:hover,
.page-faq .idx-link:focus-visible {
  background: rgba(47, 123, 255, 0.13);
  color: var(--ice);
}

.page-faq .idx-no {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-faq .idx-item--archive .idx-no {
  color: var(--amber);
}

.page-faq .idx-item--feedback .idx-no {
  color: var(--magenta);
}

.page-faq .idx-foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--steel);
}

.page-faq .idx-foot-text {
  margin: 0 0 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(26px, 4vw, 40px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--steel);
}

.page-faq .group-head {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .group-no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-faq .group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .group-lede {
  margin: 0;
  max-width: 58ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-group--archive .group-no {
  color: var(--amber);
}

.page-faq .faq-group--feedback .group-no {
  color: var(--magenta);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 0 0 20px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--ink-panel);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure--play img {
  aspect-ratio: 1200 / 760;
}

.page-faq .faq-figure--archive img {
  aspect-ratio: 1200 / 800;
}

.page-faq .faq-figure--archive {
  border-color: rgba(215, 162, 76, 0.34);
}

.page-faq .faq-figcap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
  background: linear-gradient(180deg, rgba(6, 8, 15, 0) 0%, rgba(6, 8, 15, 0.92) 62%);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa-list {
  display: flex;
  flex-direction: column;
}

.page-faq .qa {
  border-bottom: 1px solid var(--steel);
}

.page-faq .qa:first-child {
  border-top: 1px solid var(--steel);
}

.page-faq .qa-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ice);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa-head:hover {
  color: var(--cyan);
}

.page-faq .qa-sign {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--steel);
  border-radius: 50%;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .qa-sign::before,
.page-faq .qa-sign::after {
  content: "";
  position: absolute;
  background: var(--mist);
  border-radius: 1px;
  transition: background 0.3s var(--ease);
}

.page-faq .qa-sign::before {
  left: 50%;
  top: 4px;
  bottom: 4px;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .qa-sign::after {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .qa[open] .qa-head {
  color: var(--cyan);
}

.page-faq .qa[open] .qa-sign {
  transform: rotate(135deg);
  border-color: var(--cyan);
}

.page-faq .qa[open] .qa-sign::before,
.page-faq .qa[open] .qa-sign::after {
  background: var(--cyan);
}

.page-faq .qa-body {
  padding: 0 2px 18px 0;
  animation: faq-open 0.28s var(--ease);
}

@keyframes faq-open {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .qa-body p {
  margin: 0 0 9px;
  max-width: 64ch;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .qa-body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa-more a {
  display: inline-block;
  font-size: 12.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(60, 242, 212, 0.36);
  padding-bottom: 1px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .qa-more a:hover {
  border-bottom-color: var(--cyan);
}

/* 旧版本分组的琥珀色强调 */
.page-faq .faq-group--archive .qa[open] .qa-head {
  color: var(--amber);
}

.page-faq .faq-group--archive .qa[open] .qa-sign {
  border-color: var(--amber);
}

.page-faq .faq-group--archive .qa[open] .qa-sign::before,
.page-faq .faq-group--archive .qa[open] .qa-sign::after {
  background: var(--amber);
}

.page-faq .faq-group--archive .qa-more a {
  color: var(--amber);
  border-bottom-color: rgba(215, 162, 76, 0.4);
}

/* 反馈分组的洋红强调 */
.page-faq .faq-group--feedback .qa[open] .qa-head {
  color: var(--magenta);
}

.page-faq .faq-group--feedback .qa[open] .qa-sign {
  border-color: var(--magenta);
}

.page-faq .faq-group--feedback .qa[open] .qa-sign::before,
.page-faq .faq-group--feedback .qa[open] .qa-sign::after {
  background: var(--magenta);
}

/* ---------- 联系信息区 ---------- */
.page-faq .contact-box {
  margin-top: 24px;
  padding: 20px 16px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(60, 242, 212, 0.1), transparent 62%),
    linear-gradient(180deg, rgba(13, 20, 36, 0.95), rgba(6, 8, 15, 0.9));
  display: grid;
  gap: 14px;
}

.page-faq .cb-item {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.page-faq .cb-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .cb-val {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .cb-val--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .cb-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--steel);
  font-size: 12px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .contact-box .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .contact-box {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
    padding: 22px 22px;
  }

  .page-faq .cb-note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    padding: 18px 16px 20px;
  }

  .page-faq .faq-group {
    padding-top: 0;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 48px;
    padding-top: 42px;
  }

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

  .page-faq .qa-head {
    font-size: 15.5px;
    padding: 18px 2px 18px 0;
  }

  .page-faq .qa-body {
    padding-bottom: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .hero-pulse {
    animation: none;
  }

  .page-faq .qa-sign,
  .page-faq .qa-head,
  .page-faq .idx-link,
  .page-faq .crumb-link,
  .page-faq .qa-more a {
    transition: none;
  }

  .page-faq .qa-body {
    animation: none;
  }
}

/* 完 */