.page-faq {
  --faq-line: rgba(110, 116, 128, .28);
  --faq-line-soft: rgba(110, 116, 128, .18);
  --faq-radius: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.5vw, 36px) 0 clamp(28px, 4.6vw, 50px);
  background:
    radial-gradient(680px 260px at 6% -12%, var(--glow-violet), transparent 68%),
    radial-gradient(560px 240px at 94% 2%, var(--glow-cyan), transparent 72%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent);
  opacity: .5;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 20px;
  margin-top: 16px;
}

.page-faq .faq-hero__lead h1 {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: .04em;
  color: var(--text);
  text-shadow: 0 0 42px rgba(34, 211, 238, .14);
}

.page-faq .faq-hero__intro .lede {
  margin: 0;
  font-size: var(--fs-18);
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 40ch;
}

.page-faq .faq-hero__note {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--moss);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--text-dim);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: end;
  }
}

/* ---------- 三条最短路径 ---------- */
.page-faq .faq-paths {
  padding: clamp(30px, 5vw, 56px) 0 0;
}

.page-faq .path-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .path {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  background:
    linear-gradient(160deg, rgba(19, 28, 69, .92), rgba(10, 18, 48, .7));
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.page-faq .path::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-faq .path:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 211, 238, .45);
  box-shadow: 0 22px 44px -28px rgba(34, 211, 238, .55);
}

.page-faq .path__num {
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--clay);
}

.page-faq .path__title {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--text);
}

.page-faq .path__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .path__steps li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .path__steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .path .link-arrow {
  margin-top: auto;
}

@media (min-width: 860px) {
  .page-faq .path-list {
    grid-template-columns: 1.35fr 1fr 1fr;
    gap: 18px;
  }
}

/* ---------- 问答分区骨架 ---------- */
.page-faq .faq-section {
  padding: clamp(38px, 6vw, 70px) 0 0;
}

.page-faq .faq-section__grid {
  display: grid;
  gap: 22px;
}

.page-faq .faq-section__aside {
  border-top: 2px solid var(--clay);
  padding-top: 14px;
}

.page-faq .faq-section__idx {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: .2em;
  color: var(--text-dim);
}

.page-faq .faq-section__title {
  margin: 10px 0 8px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.28;
  letter-spacing: .04em;
  color: var(--text);
}

.page-faq .faq-section__meta {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--moss);
}

.page-faq .faq-section__main {
  min-width: 0;
}

.page-faq .faq-section__main > .img-frame {
  margin: 0 0 26px;
}

@media (min-width: 960px) {
  .page-faq .faq-section__grid {
    grid-template-columns: minmax(180px, 226px) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 66px);
  }

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

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  display: grid;
}

.page-faq .qa {
  border-top: 1px solid var(--faq-line);
  transition: background var(--dur) var(--ease);
}

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

.page-faq .qa[open] {
  background: linear-gradient(180deg, rgba(19, 28, 69, .7), rgba(19, 28, 69, 0));
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) 20px;
  align-items: baseline;
  gap: 14px;
  padding: 18px 8px 18px 4px;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-s);
  transition: background var(--dur) var(--ease);
}

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

.page-faq .qa__summary:hover {
  background: rgba(34, 211, 238, .05);
}

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

.page-faq .qa__num {
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--stone);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__q {
  font-size: var(--fs-16);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.62;
  color: var(--text);
}

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

.page-faq .qa__mark {
  position: relative;
  width: 18px;
  height: 18px;
  align-self: center;
  justify-self: end;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--stone);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa__mark::before {
  width: 14px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__mark::after {
  width: 1.5px;
  height: 14px;
  transform: translate(-50%, -50%);
}

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

.page-faq .qa[open] .qa__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__body {
  padding: 0 8px 26px 72px;
  font-size: var(--fs-16);
  line-height: 1.95;
  color: var(--text-soft);
}

.page-faq .qa__body > p {
  margin: 0;
  max-width: 58ch;
}

.page-faq .qa__steps {
  counter-reset: qstep;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 60ch;
}

.page-faq .qa__steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-faq .qa__steps li::before {
  counter-increment: qstep;
  content: counter(qstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  text-align: center;
  padding: 3px 0;
  border: 1px solid rgba(34, 211, 238, .38);
  border-radius: var(--radius-s);
  background: rgba(34, 211, 238, .12);
  color: var(--cyan);
}

/* ---------- 联系收束 ---------- */
.page-faq .faq-help {
  --text-soft: #39404F;
  --text-dim: #5B6273;
  margin-top: clamp(44px, 6vw, 82px);
  padding: clamp(34px, 5vw, 60px) 0 clamp(34px, 5vw, 60px);
  border-radius: var(--radius-l) var(--radius-l) 0 0;
  background:
    radial-gradient(520px 220px at 88% 0%, rgba(34, 211, 238, .12), transparent 70%),
    linear-gradient(180deg, #F7F3EB, var(--paper));
  color: #0A1230;
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-help__idx {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: #7A5A47;
}

.page-faq .faq-help h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  letter-spacing: .04em;
  color: #0A1230;
}

.page-faq .faq-help h3 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: var(--fs-22);
  font-weight: 600;
  letter-spacing: .02em;
  color: #0A1230;
}

.page-faq .faq-help__text {
  margin: 0 0 18px;
  max-width: 44ch;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--text-soft);
}

.page-faq .faq-help__prep {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 52ch;
}

.page-faq .faq-help__prep li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-faq .faq-help__prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .8em;
  width: 10px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 11px;
  border-bottom: 1px dashed rgba(110, 116, 128, .5);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: #23293A;
}

.page-faq .faq-help__list .mono {
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: #7A5A47;
}

.page-faq .faq-help__note {
  margin: 16px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-faq .faq-help__links {
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-faq .faq-help__base {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(110, 116, 128, .4);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: #5B6273;
}

@media (min-width: 880px) {
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }
}

/* ---------- 小屏收敛 ---------- */
@media (max-width: 640px) {
  .page-faq .qa__summary {
    grid-template-columns: 36px minmax(0, 1fr) 18px;
    gap: 10px;
    padding: 16px 4px 16px 0;
  }

  .page-faq .qa__body {
    padding: 0 4px 22px 0;
    font-size: var(--fs-16);
    line-height: 1.9;
  }

  .page-faq .qa__steps li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }

  .page-faq .faq-help__list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .path,
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa__summary {
    transition: none;
  }

  .page-faq .path:hover {
    transform: none;
  }
}