.page-faq {
  --faq-gap: clamp(18px, 3vw, 32px);
  padding-block: clamp(18px, 3vw, 34px) clamp(36px, 6vw, 72px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 5vw, 58px) clamp(18px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(47, 243, 208, 0.16), transparent 58%),
    radial-gradient(90% 80% at 100% 100%, rgba(255, 122, 26, 0.14), transparent 62%),
    var(--bg-section);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -32%;
  right: -20%;
  width: 64%;
  height: 164%;
  border-radius: 46% 0 0 46%;
  background: linear-gradient(152deg, rgba(110, 31, 53, 0.62), rgba(46, 42, 107, 0.5) 58%, transparent 94%);
  transform: skewX(-15deg);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(27px, 6.2vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--fog);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 2.5vw, 17px);
  line-height: 1.85;
  color: var(--slate-soft);
}

.page-faq .faq-hero__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--cyan-line);
  border-radius: var(--r-pill);
  background: rgba(47, 243, 208, 0.07);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

.page-faq .faq-mark::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  flex: none;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-card);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-hero__chip {
  position: absolute;
  left: 14px;
  bottom: 14px;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 122, 26, 0.5);
  border-radius: var(--r-pill);
  background: rgba(6, 20, 18, 0.82);
  backdrop-filter: blur(6px);
}

.page-faq .faq-chip__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate-soft);
}

.page-faq .faq-chip__val {
  font-family: var(--font-cond);
  font-size: 22px;
  line-height: 1;
  color: var(--orange);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(28px, 5vw, 56px);
}

.page-faq .faq-side__inner {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(16, 53, 47, 0.94), rgba(10, 31, 27, 0.94));
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-side__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--fog);
}

.page-faq .faq-index {
  display: grid;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  text-decoration: none;
  color: var(--fog);
  font-size: 14px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-index__row:hover,
.page-faq .faq-index__row:focus-visible {
  background: rgba(47, 243, 208, 0.08);
  border-color: var(--cyan-line);
  transform: translateX(2px);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index__count {
  font-family: var(--font-cond);
  font-size: 16px;
  line-height: 1;
  color: var(--slate-soft);
}

.page-faq .faq-side__filter {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-side__filter-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate-soft);
}

.page-faq .faq-side__filter .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-side__filter .filter-btn {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.2;
  padding: 7px 12px;
  border-radius: var(--r-pill);
}

.page-faq .faq-side__filter .filter-btn__count {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: clamp(24px, 4vw, 38px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 110px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-cond);
  font-size: 28px;
  line-height: 1;
  color: rgba(47, 243, 208, 0.42);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(19px, 3.2vw, 24px);
  color: var(--fog);
}

.page-faq .faq-group__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-soft);
}

.page-faq .faq-item {
  margin-bottom: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(16, 53, 47, 0.55);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--cyan-line);
  background: rgba(16, 53, 47, 0.92);
  box-shadow: var(--glow-cyan);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--fog);
  font-size: clamp(14.5px, 2.6vw, 16px);
  font-weight: 500;
  line-height: 1.6;
}

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

.page-faq .faq-item > summary::after {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease);
  flex: none;
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
  border-radius: var(--r-md);
}

.page-faq .faq-item__q {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 3px;
}

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

.page-faq .faq-item__body {
  padding: 14px 16px 20px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-soft);
}

.page-faq .faq-item__body p.faq-item__after {
  margin-top: 12px;
  font-size: 14px;
  color: var(--fog);
}

.page-faq .faq-steps {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fog);
}

.page-faq .faq-steps li::before {
  content: counter(step, decimal-leading-zero);
  height: 24px;
  line-height: 22px;
  text-align: center;
  border: 1px solid var(--cyan-line);
  border-radius: 8px;
  background: rgba(47, 243, 208, 0.1);
  font-family: var(--font-cond);
  font-size: 15px;
  color: var(--cyan);
}

.page-faq .faq-tag {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(74, 93, 115, 0.22);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--cyan-soft);
}

.page-faq .faq-visual {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-section);
}

.page-faq .faq-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-visual figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate-soft);
}

.page-faq .faq-empty {
  margin: 0;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: var(--r-md);
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-soft);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-help {
  margin-top: clamp(34px, 6vw, 68px);
  padding: clamp(24px, 4vw, 46px) clamp(18px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(46, 42, 107, 0.5), transparent 62%),
    radial-gradient(70% 100% at 0% 100%, rgba(110, 31, 53, 0.42), transparent 66%),
    var(--bg-section);
}

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

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.35;
  color: var(--fog);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-soft);
}

.page-faq .faq-prep {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-prep li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fog);
}

.page-faq .faq-prep li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 9px;
  background: var(--orange);
  transform: rotate(45deg);
  flex: none;
}

.page-faq .faq-contact {
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__item {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(6, 20, 18, 0.6);
}

.page-faq .faq-contact__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate-soft);
}

.page-faq .faq-contact__value {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate-soft);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__aside {
    max-width: 420px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-hero__aside {
    max-width: none;
    margin-left: auto;
    width: 100%;
  }

  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-help .faq-contact {
    margin-top: 4px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-help .grid--12 {
    align-items: start;
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__row,
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after {
    transition: none;
  }

  .page-faq .faq-index__row:hover,
  .page-faq .faq-index__row:focus-visible {
    transform: none;
  }
}