.page-faq {
  --faq-rule: rgba(74, 90, 120, 0.42);
  --faq-rule-cyan: rgba(57, 232, 214, 0.32);
  --faq-soft: rgba(247, 250, 255, 0.76);
  --faq-softer: rgba(247, 250, 255, 0.56);
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}
.page-faq .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--faq-softer);
}
.page-faq .crumbs__link {
  color: var(--cyan);
  text-decoration: none;
}
.page-faq .crumbs__link:hover {
  color: var(--cyan-soft);
  text-decoration: underline;
}
.page-faq .crumbs__current {
  color: var(--faq-soft);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(22px, 4vw, 48px);
  padding-bottom: clamp(30px, 5vw, 64px);
  border-bottom: 1px solid var(--faq-rule);
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}
.page-faq .faq-hero .eyebrow {
  letter-spacing: 0.16em;
  color: var(--amber);
}
.page-faq .faq-hero__title {
  position: relative;
  margin: 10px 0 20px;
  max-width: 18ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-faq .faq-hero__title::before {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  margin-bottom: 18px;
  background: var(--amber);
}
.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .faq-hero__aside {
  padding: 18px 18px 6px;
  border: 1px solid var(--faq-rule-cyan);
  background: linear-gradient(180deg, rgba(18, 36, 74, 0.92), rgba(11, 27, 58, 0.55));
  box-shadow: 6px 6px 0 rgba(57, 232, 214, 0.08);
}
.page-faq .faq-aside__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-faq .faq-index {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-index__item + .faq-index__item {
  border-top: 1px dashed var(--faq-rule);
}
.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  font-size: 14px;
  color: var(--white);
  text-decoration: none;
  transition: color 0.18s ease, transform 0.18s ease;
}
.page-faq .faq-index__link:hover {
  color: var(--cyan);
  transform: translateX(3px);
}
.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}
.page-faq .faq-index__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faq-softer);
}

/* ---------- 章节外壳 ---------- */
.page-faq .faq-block {
  padding-block: clamp(38px, 7vw, 78px);
}
.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--faq-rule);
}
.page-faq .faq-blockhead {
  max-width: 64ch;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}
.page-faq .faq-blockhead__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-faq .faq-blockhead__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--white);
}
.page-faq .faq-blockhead__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-softer);
}

/* ---------- 三步路径 ---------- */
.page-faq .faq-path {
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(22px, 3.5vw, 36px);
  padding: 0;
  list-style: none;
  border: 1px solid var(--faq-rule);
  background: var(--faq-rule);
}
.page-faq .faq-path__step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--midnight);
}
.page-faq .faq-path__step::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(57, 232, 214, 0) 72%);
  opacity: 0.55;
}
.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-faq .faq-path__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--white);
}
.page-faq .faq-path__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-soft);
}
.page-faq .faq-path__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-shot {
  margin: 0;
  max-width: 1000px;
}
.page-faq .faq-shot--sm {
  max-width: 760px;
}
.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .media__cap {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
}

/* ---------- 筛选 ---------- */
.page-faq .faq-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(24px, 4vw, 40px);
  padding: 14px 0;
  border-top: 1px solid var(--faq-rule);
  border-bottom: 1px solid var(--faq-rule);
}
.page-faq .faq-tools__label {
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--faq-softer);
}
.page-faq .filterbar__btn {
  padding: 7px 14px;
  border: 1px solid var(--faq-rule);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--faq-soft);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}
.page-faq .filterbar__btn:hover {
  border-color: var(--cyan);
  color: var(--white);
}
.page-faq .filterbar__btn[aria-pressed="true"] {
  border-color: var(--cyan);
  background: rgba(57, 232, 214, 0.12);
  color: var(--cyan);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: clamp(34px, 5vw, 58px);
}
.page-faq .faq-group {
  display: grid;
  gap: 16px;
}
.page-faq .faq-group[hidden] {
  display: none;
}
.page-faq .faq-group__head {
  padding-left: 16px;
  border-left: 2px solid var(--amber);
}
.page-faq .faq-group__no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}
.page-faq .faq-group__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  line-height: 1.22;
  color: var(--white);
}
.page-faq .faq-group__lede {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--faq-softer);
}
.page-faq .faq-group__body {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  min-width: 0;
}

/* ---------- 手风琴 ---------- */
.page-faq .accordion {
  border-top: 1px solid var(--faq-rule);
}
.page-faq .accordion__item {
  border-bottom: 1px solid var(--faq-rule);
}
.page-faq .accordion__item h4 {
  margin: 0;
}
.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 16px 0;
  border: 0;
  background: none;
  text-align: left;
  color: var(--white);
  cursor: pointer;
}
.page-faq .accordion__trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}
.page-faq .accordion__q {
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.01em;
  transition: color 0.18s ease;
}
.page-faq .accordion__trigger:hover .accordion__q {
  color: var(--cyan);
}
.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--faq-rule-cyan);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}
.page-faq .accordion__icon::before {
  width: 9px;
  height: 1.5px;
}
.page-faq .accordion__icon::after {
  width: 1.5px;
  height: 9px;
  transition: transform 0.2s ease;
}
.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon {
  border-color: var(--cyan);
  background: rgba(57, 232, 214, 0.14);
}
.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}
.page-faq .accordion__panel {
  display: block;
}
.page-faq .accordion__panel[hidden] {
  display: none;
}
.page-faq .accordion__panel-inner {
  max-width: 68ch;
  padding: 0 32px 20px 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--faq-soft);
}
.page-faq .accordion__panel-inner p {
  margin: 0;
}
.page-faq .accordion__panel-inner a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  padding-block: clamp(38px, 6vw, 70px);
  border-top: 1px solid var(--faq-rule);
  background: linear-gradient(135deg, rgba(18, 36, 74, 0.86), rgba(11, 27, 58, 0.35));
}
.page-faq .faq-outro__inner {
  display: grid;
  gap: 22px;
}
.page-faq .faq-outro__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--white);
}
.page-faq .faq-outro__text {
  max-width: 56ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-soft);
}
.page-faq .faq-outro__acts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.page-faq .copybtn {
  padding: 10px 16px;
  border: 1px solid var(--faq-rule-cyan);
  border-radius: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--cyan);
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.page-faq .copybtn:hover {
  background: rgba(57, 232, 214, 0.12);
}
.page-faq .copybtn[data-copied="true"] {
  border-color: var(--amber);
  color: var(--amber);
}
.page-faq .copy-hint {
  display: block;
  min-height: 1em;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}

/* ---------- 显现动效 ---------- */
.has-js .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.has-js .page-faq [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group {
    grid-template-columns: minmax(190px, 240px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }
  .page-faq .faq-group__head {
    position: sticky;
    top: clamp(84px, 12vw, 110px);
    align-self: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
    gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (max-width: 599px) {
  .page-faq .accordion__panel-inner {
    padding-right: 0;
  }
  .page-faq .faq-tools__label {
    width: 100%;
    margin-bottom: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .has-js .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-faq .faq-index__link,
  .page-faq .accordion__q,
  .page-faq .accordion__icon,
  .page-faq .accordion__icon::after,
  .page-faq .filterbar__btn,
  .page-faq .copybtn {
    transition: none;
  }
}