.page-faq {
  --faq-num-w: clamp(42px, 7vw, 62px);
  --faq-rule: 1px solid var(--ink-700);
  --faq-gap: clamp(18px, 3vw, 28px);
  display: block;
  overflow-x: clip;
}

.page-faq .faq-hero {
  padding-block: clamp(26px, 4.4vw, 52px) clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero-inner {
  max-width: 780px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: clamp(28px, 5.4vw, 50px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--chalk);
  margin: 14px 0 18px;
  overflow-wrap: break-word;
}

.page-faq .faq-hero .lede {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.75;
  color: var(--mist-100);
  max-width: 640px;
  margin: 0;
}

.page-faq .faq-searchhint {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 13px 16px;
  max-width: 640px;
  background: var(--ink-800);
  border: var(--faq-rule);
  color: var(--slate-400);
  font-size: 13.5px;
  line-height: 1.5;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.page-faq .faq-searchhint svg {
  flex: none;
  color: var(--cyan-400);
}

.page-faq .faq-hero-media {
  margin: clamp(26px, 3.6vw, 44px) 0 0;
  aspect-ratio: 1200 / 500;
  border: var(--faq-rule);
  background: var(--ink-950);
}

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

/* 主体双栏 */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 52px);
  padding-block: clamp(30px, 4vw, 56px) clamp(36px, 5vw, 72px);
}

/* 目录 */
.page-faq .faq-toc {
  border-top: 4px solid var(--cyan-400);
  padding-top: 18px;
}

.page-faq .faq-toc-title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--slate-400);
  margin: 0 0 14px;
}

.page-faq .faq-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px 9px 8px;
  color: var(--mist-100);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  border-left: 3px solid transparent;
  transition: background-color 0.2s var(--ease-out), border-color 0.2s var(--ease-out), color 0.2s var(--ease-out);
}

.page-faq .faq-toc-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--slate-400);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  flex: none;
}

.page-faq .faq-toc-text {
  min-width: 0;
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  background: var(--ink-800);
  border-left-color: var(--cyan-400);
  color: var(--chalk);
}

.page-faq .faq-toc-list a:hover .faq-toc-num,
.page-faq .faq-toc-list a:focus-visible .faq-toc-num {
  color: var(--cyan-400);
}

.page-faq .faq-toc-list a:focus-visible {
  outline: 2px solid var(--cyan-200);
  outline-offset: 2px;
}

.page-faq .faq-toc-note {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .faq-toc-note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 198, 0.4);
}

.page-faq .faq-toc-note a:hover,
.page-faq .faq-toc-note a:focus-visible {
  color: var(--cyan-200);
  border-bottom-color: var(--cyan-200);
}

/* 分组 */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4.4vw, 60px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-top: var(--faq-rule);
  padding-top: 16px;
  margin-bottom: 4px;
}

.page-faq .faq-group-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
  flex: none;
}

.page-faq .faq-group-head h2 {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.3;
  color: var(--chalk);
  margin: 0;
}

.page-faq .faq-side-media {
  max-width: 280px;
  margin: 18px 0 26px;
  border: var(--faq-rule);
  background: var(--ink-950);
}

.page-faq .faq-side-media img {
  display: block;
  width: 100%;
  height: auto;
}

/* 问答项 */
.page-faq .qa {
  --qa-num-w: var(--faq-num-w);
  border-bottom: var(--faq-rule);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--ease-out);
}

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

.page-faq .qa summary::marker {
  content: "";
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--cyan-200);
  outline-offset: -2px;
}

.page-faq .qa-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.2;
  color: var(--cyan-400);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  min-width: var(--qa-num-w);
  flex: none;
}

.page-faq .qa-q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--mist-100);
  padding-top: 3px;
  overflow-wrap: break-word;
}

.page-faq .qa summary::after {
  content: "";
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-right: 2px solid var(--slate-400);
  border-bottom: 2px solid var(--slate-400);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.page-faq .qa[open] summary::after {
  transform: rotate(225deg);
  border-color: var(--cyan-400);
}

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

.page-faq .qa-a {
  padding: 0 0 20px 16px;
  margin-left: 0;
  max-width: 660px;
  border-left: 3px solid var(--cyan-400);
}

.page-faq .qa-a > p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist-100);
  overflow-wrap: break-word;
}

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

.page-faq .qa[open] .qa-a {
  animation: faq-block-in 0.3s var(--ease-out) both;
}

@keyframes faq-block-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .qa-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 4px 9px;
  color: var(--cyan-200);
  background: rgba(53, 240, 198, 0.1);
  border: 1px solid rgba(53, 240, 198, 0.35);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.page-faq .qa-steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 32px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist-100);
}

.page-faq .qa-steps li::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-950);
  background: var(--cyan-400);
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

/* 页尾 */
.page-faq .faq-outro {
  background: var(--ink-800);
  border-top: var(--faq-rule);
  padding-block: clamp(34px, 4.6vw, 60px) clamp(42px, 5.4vw, 76px);
}

.page-faq .faq-outro-inner {
  position: relative;
  max-width: 760px;
}

.page-faq .faq-outro .track-line {
  width: 120px;
  height: 8px;
  margin-bottom: 22px;
  background: repeating-linear-gradient(
    -45deg,
    var(--cyan-400) 0 10px,
    transparent 10px 20px
  );
}

.page-faq .faq-outro h2 {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.28;
  color: var(--chalk);
  margin: 12px 0 14px;
}

.page-faq .faq-outro p {
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist-100);
  margin: 0 0 22px;
  max-width: 600px;
}

/* 桌面：左目录 + 右答案 */
@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(212px, 264px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .qa-a {
    margin-left: calc(var(--qa-num-w) + 14px);
  }

  .page-faq .faq-side-media {
    float: right;
    max-width: 240px;
    margin: 6px 0 20px 32px;
  }

  .page-faq .qa summary {
    padding: 20px 0;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-side-media {
    max-width: 268px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-searchhint {
    align-items: flex-start;
    font-size: 13px;
  }

  .page-faq .qa summary {
    gap: 10px;
  }

  .page-faq .qa-a {
    padding-left: 13px;
  }

  .page-faq .faq-side-media {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa-a {
    animation: none;
  }

  .page-faq .qa summary,
  .page-faq .qa summary::after,
  .page-faq .faq-toc-list a {
    transition: none;
  }
}