.page-faq {
  --faq-narrow: 62ch;
  padding-bottom: clamp(48px, 8vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.6vw, 52px) 0 clamp(22px, 3.4vw, 36px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(180deg, rgba(37, 232, 201, 0.08), rgba(13, 21, 48, 0) 64%),
    repeating-linear-gradient(90deg, rgba(46, 58, 94, 0.42) 0 1px, rgba(46, 58, 94, 0) 1px 56px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 240px;
  height: 240px;
  background: linear-gradient(135deg, rgba(255, 138, 61, 0.18), rgba(255, 138, 61, 0) 72%);
  transform: rotate(8deg);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 5.4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--paper);
  max-width: 22ch;
}

.page-faq .faq-hero-lede {
  margin: 18px 0 0;
  max-width: var(--faq-narrow);
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-jump a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  background-color: rgba(37, 232, 201, 0.09);
}

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

.page-faq .faq-hero-panel {
  position: relative;
  padding: 18px 18px 14px;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, var(--ink-2), rgba(13, 21, 48, 0.85));
  clip-path: var(--shape-cut);
}

.page-faq .faq-hero-svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 190px;
}

.page-faq .faq-hero-panel-note {
  margin: 10px 0 0;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-top: clamp(36px, 6vw, 68px);
  scroll-margin-top: 100px;
}

.page-faq .faq-sec-head {
  position: relative;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-sec-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

.page-faq .faq-sec-idx {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--rust);
}

.page-faq .faq-sec-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.008em;
  color: var(--paper);
}

.page-faq .faq-sec-note {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-faq .qa-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .qa-summary:hover {
  background-color: rgba(24, 35, 76, 0.72);
}

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

.page-faq .qa-idx {
  font-family: var(--font-num);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.page-faq details[open] > .qa-summary .qa-idx {
  color: var(--cyan);
}

.page-faq .qa-q {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(17px, 2.3vw, 22px);
  line-height: 1.42;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-faq .qa-mark {
  position: relative;
  align-self: center;
  width: 15px;
  height: 15px;
  flex: none;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 15px;
  height: 2px;
  background: var(--orange);
  transform: translateY(-50%);
  transition:
    transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .qa-mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq details[open] > .qa-summary .qa-mark::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq details[open] > .qa-summary .qa-mark::before {
  background: var(--cyan);
}

.page-faq .qa-body {
  padding: 2px 4px 22px;
}

.page-faq .qa-answer {
  margin: 0 0 12px;
  max-width: var(--faq-narrow);
  font-size: 16px;
  line-height: 1.76;
  color: var(--paper);
}

.page-faq .qa-steps {
  margin: 0;
  padding: 0;
  max-width: var(--faq-narrow);
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .qa-steps li {
  position: relative;
  margin-bottom: 8px;
  padding-left: 30px;
  counter-increment: faqstep;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .qa-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-faq .qa-extra {
  margin: 12px 0 0;
  max-width: var(--faq-narrow);
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .qa-body a:hover {
  color: var(--orange);
}

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

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 28px 0 0;
  padding: 1px;
  background: var(--line);
  clip-path: var(--shape-cut);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--ink-2);
}

.page-faq .faq-figure figcaption {
  padding: 11px 16px 13px;
  background: var(--ink-2);
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 还需要帮助 ---------- */
.page-faq .faq-help {
  margin-top: 24px;
  padding: clamp(22px, 3.6vw, 36px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(152deg, var(--ink-2), rgba(24, 35, 76, 0.72) 68%);
  clip-path: var(--shape-cut);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: 18px;
}

.page-faq .faq-help-item {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-help-label {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-help-value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(15px, 2vw, 18px);
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help-text {
  margin: 22px 0 0;
  max-width: var(--faq-narrow);
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--mist);
}

.page-faq .faq-help-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 520px) {
  .page-faq .qa-summary {
    gap: 10px;
    padding: 16px 2px;
  }

  .page-faq .qa-body {
    padding: 0 2px 20px;
  }

  .page-faq .qa-steps li {
    padding-left: 26px;
  }

  .page-faq .faq-help {
    border-left-width: 2px;
  }
}

/* ---------- 中屏 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-help-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help-item {
    padding-bottom: 0;
    border-bottom: none;
    border-left: 1px solid var(--line);
    padding-left: 16px;
  }
}

/* ---------- 宽屏：左侧粘性章节头 + 右侧问答流 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-sec .wrap {
    display: grid;
    grid-template-columns: minmax(190px, 248px) minmax(0, 1fr);
    column-gap: 48px;
    align-items: start;
  }

  .page-faq .faq-sec-head {
    position: sticky;
    top: 108px;
    padding: 2px 0 2px 18px;
    border-bottom: none;
  }

  .page-faq .faq-sec-head::after {
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    height: auto;
    background: linear-gradient(180deg, var(--cyan), var(--orange));
  }

  .page-faq .faq-list {
    margin-top: 0;
  }

  .page-faq .faq-figure {
    margin-top: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-summary,
  .page-faq .qa-idx,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .faq-jump a,
  .page-faq .qa-body a {
    transition: none;
  }
}