.page-faq {
  --faq-rule: var(--ink-700);
  --faq-pad: clamp(18px, 3.4vw, 38px);
  --faq-measure: 62ch;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .support-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
  padding: clamp(28px, 5vw, 76px) 0 clamp(26px, 4vw, 54px);
  overflow: hidden;
}

.page-faq .support-hero::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -30%;
  width: 120%;
  height: 70%;
  background: linear-gradient(118deg, rgba(34, 224, 208, 0.14) 0%, rgba(18, 32, 58, 0.6) 42%, rgba(7, 15, 31, 0) 78%);
  transform: skewY(-4deg);
  pointer-events: none;
  z-index: 0;
}

.page-faq .support-hero__copy {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .support-hero .eyebrow {
  margin: 18px 0 0;
  color: var(--neon-cyan);
}

.page-faq .support-hero .display {
  margin: 12px 0 18px;
  color: var(--chalk);
}

.page-faq .support-hero .lede {
  max-width: 54ch;
  color: var(--slate-300);
}

.page-faq .support-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .support-hero__media {
  position: relative;
  z-index: 1;
  margin: 0;
  clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
}

.page-faq .support-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-faq .support-hero {
    grid-template-columns: 7fr 5fr;
  }
}

/* ---------- 正文骨架 ---------- */
.page-faq .support-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  padding-bottom: clamp(36px, 6vw, 84px);
}

@media (min-width: 1024px) {
  .page-faq .support-body {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
  }
}

.page-faq .qa-column {
  min-width: 0;
}

/* ---------- 分类锚点轨 ---------- */
.page-faq .topic-rail {
  position: relative;
  min-width: 0;
}

.page-faq .topic-rail__title {
  margin: 0 0 12px;
  color: var(--blue-gray);
}

.page-faq .topic-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .topic-rail__list li {
  flex: 0 0 auto;
}

.page-faq .topic-rail__link {
  display: block;
  padding: 10px 16px 12px 0;
  color: var(--slate-300);
  font-size: 14px;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  border-top: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .topic-rail__link:hover,
.page-faq .topic-rail__link:focus-visible {
  color: var(--chalk);
  border-top-color: var(--neon-cyan);
}

@media (min-width: 1024px) {
  .page-faq .topic-rail {
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-faq .topic-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .topic-rail__list li + li {
    border-top: 1px solid rgba(29, 50, 85, 0.6);
  }

  .page-faq .topic-rail__link {
    padding: 13px 0 13px 16px;
    border-top: 0;
    border-left: 2px solid var(--ink-700);
    white-space: normal;
  }

  .page-faq .topic-rail__link:hover,
  .page-faq .topic-rail__link:focus-visible {
    border-left-color: var(--neon-cyan);
    border-top-color: transparent;
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .qa-group {
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 132px;
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(44px, 6vw, 88px);
}

.page-faq .qa-group__head {
  position: relative;
  padding-left: 18px;
}

.page-faq .qa-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 3px;
  height: 46px;
  background: var(--blazing-red);
  transform: skewY(-12deg);
}

.page-faq .qa-group__head .eyebrow {
  margin: 0;
  color: var(--blue-gray);
}

.page-faq .qa-group__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-faq .qa-group__intro {
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-editorial);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.7;
  color: var(--cyan-100);
}

.page-faq .qa-list {
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  position: relative;
  border: 1px solid var(--faq-rule);
  background: linear-gradient(180deg, rgba(18, 32, 58, 0.82) 0%, rgba(7, 15, 31, 0.86) 100%);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 14px;
}

.page-faq .qa:hover,
.page-faq .qa:focus-within {
  border-color: var(--neon-cyan);
  transform: translateY(-2px);
}

.page-faq .qa[open] {
  border-color: rgba(34, 224, 208, 0.5);
}

.page-faq .qa__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px var(--faq-pad);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__head::before {
  content: "";
  flex: none;
  width: 14px;
  height: 2px;
  margin-top: 15px;
  background: var(--blue-gray);
  transition: width 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .qa:hover .qa__head::before {
  width: 20px;
  background: var(--cyan-100);
}

.page-faq .qa[open] .qa__head::before {
  width: 28px;
  background: var(--blazing-red);
}

.page-faq .qa__num {
  flex: none;
  margin-top: 1px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.2vw, 24px);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--blue-gray);
  transition: color 0.22s var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--score-amber);
}

.page-faq .qa__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.55;
  color: var(--chalk);
}

.page-faq .qa__body {
  padding: 0 var(--faq-pad) 26px var(--faq-pad);
  color: var(--slate-300);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  max-width: var(--faq-measure);
}

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

.page-faq .qa__lead {
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.6;
  color: var(--cyan-100);
}

.page-faq .qa__body a {
  color: var(--neon-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 720px) {
  .page-faq .qa__body {
    padding-left: calc(var(--faq-pad) + 30px);
  }
}

/* ---------- 平板分组配图 ---------- */
.page-faq .qa-figure {
  margin: clamp(22px, 3vw, 32px) 0 0;
  position: relative;
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .qa-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue-gray);
}

/* ---------- 这解决了吗 ---------- */
.page-faq .qa-check {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px dashed rgba(29, 50, 85, 0.9);
}

.page-faq .qa-check__head {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--blue-gray);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa-check__head::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--blazing-red);
}

.page-faq .qa-check[open] .qa-check__head::before {
  content: "−";
}

.page-faq .qa-check__head:hover,
.page-faq .qa-check:focus-within .qa-check__head,
.page-faq .qa-check[open] .qa-check__head {
  color: var(--chalk);
}

.page-faq .qa-check__body {
  margin-top: 12px;
  max-width: var(--faq-measure);
}

.page-faq .qa-check__body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate-300);
}

/* ---------- 尾部联系分组 ---------- */
.page-faq .qa-group--final {
  border-top-color: rgba(34, 224, 208, 0.4);
}

.page-faq .reach-panel {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 3.4vw, 38px);
  max-width: 62ch;
  background: linear-gradient(125deg, rgba(18, 32, 58, 0.95) 0%, rgba(7, 15, 31, 0.95) 100%);
  border: 1px solid var(--ink-700);
  border-left: 3px solid var(--neon-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .reach-panel p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate-300);
}

.page-faq .reach-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}