.page-faq {
  --faq-frame: rgba(47, 227, 234, 0.28);
  --faq-ink-soft: #4C566B;
  display: block;
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

/* 面包屑 */
.page-faq .faq-crumb {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(1rem, 3vw, 1.75rem) var(--gutter) 0;
  font-size: 0.82rem;
  color: var(--steel);
}
.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-crumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line-cyan);
}
.page-faq .faq-crumb a {
  color: var(--steel);
  text-decoration: none;
}
.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--cyan);
}
.page-faq .faq-crumb [aria-current="page"] {
  color: var(--cream);
}

/* 首屏 */
.page-faq .faq-hero {
  padding: clamp(1rem, 3vw, 2rem) 0 clamp(2rem, 5vw, 3.5rem);
}
.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
}
.page-faq .faq-hero__frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid var(--faq-frame);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 3.25rem);
  background:
    radial-gradient(120% 140% at 10% 0%, rgba(47, 227, 234, 0.14), transparent 58%),
    radial-gradient(90% 120% at 96% 110%, rgba(255, 62, 154, 0.16), transparent 62%),
    var(--panel-800);
}
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta) 58%, var(--yellow));
  opacity: 0.85;
}
.page-faq .faq-hero__kicker {
  margin: 0 0 0.9rem;
  color: var(--yellow);
  letter-spacing: 0.16em;
}
.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
  color: var(--cream);
}
.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 46ch;
  color: var(--steel);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.75;
}
.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__rail {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--panel-700);
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
}
.page-faq .faq-rail__list li:last-child a {
  border-bottom: 0;
}
.page-faq .faq-rail__list a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  padding: 0.55rem 0.2rem;
  border-bottom: 1px dashed var(--line-dark);
  color: var(--cream);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--dur) var(--ease);
}
.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--cyan);
}
.page-faq .faq-rail__list .mono {
  font-size: 0.85rem;
  color: var(--orange);
  letter-spacing: 0.06em;
}

/* 章节头 */
.page-faq .faq-head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.page-faq .section-head__index {
  margin: 0;
  color: var(--orange);
  font-size: 0.9rem;
  letter-spacing: 0.2em;
}
.page-faq .section-head__title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--cream);
}
.page-faq .faq-head__note {
  margin: 0;
  max-width: 58ch;
  color: var(--steel);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 三步上手 */
.page-faq .faq-steps {
  position: relative;
  isolation: isolate;
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}
.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  inset: 12% -6% auto -6%;
  height: 68%;
  z-index: -1;
  background: linear-gradient(115deg, rgba(47, 227, 234, 0.07), rgba(255, 62, 154, 0.05));
  transform: skewY(-2deg);
  pointer-events: none;
}
.page-faq .faq-steps__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
}
.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
}
.page-faq .faq-steps__list::before {
  content: "";
  position: absolute;
  left: 1.35rem;
  top: 1.8rem;
  bottom: 1.8rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 227, 234, 0.06));
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: 2.7rem minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 0.85rem 0;
}
.page-faq .faq-step__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-cyan);
  background: var(--ink-950);
  color: var(--cyan);
  font-size: 1.05rem;
  font-weight: 700;
}
.page-faq .faq-step__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--cream);
}
.page-faq .faq-step__body p {
  margin: 0;
  color: var(--steel);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-faq .faq-steps__figure {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--panel-800);
  padding: 0.75rem;
}
.page-faq .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}
.page-faq .media-frame__caption {
  display: block;
  margin: 0.7rem 0.25rem 0.15rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* 文档区 */
.page-faq .faq-docs {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}
.page-faq .faq-docs__bar {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.page-faq .faq-tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.35rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-pill);
  background: var(--panel-800);
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-tabs__btn {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--steel);
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-tabs__btn:hover {
  color: var(--cream);
}
.page-faq .faq-tabs__btn[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-950);
  font-weight: 600;
}
.page-faq .faq-tabs__btn:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 2px;
}
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-faq .faq-filter .filter-chip {
  min-height: 44px;
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--steel);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .faq-filter .filter-chip[aria-pressed="true"] {
  border-color: var(--yellow);
  color: var(--yellow);
}
.page-faq .faq-filter .filter-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-docs__body {
  display: grid;
  gap: 1.25rem;
}
.page-faq .faq-panel {
  background: var(--cream);
  color: var(--ink-on-cream);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 3vw, 2.5rem);
  overflow: hidden;
}
.page-faq .faq-doc {
  padding: 1.35rem 0;
  border-top: 1px solid var(--cream-line);
}
.page-faq .faq-doc:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-faq .faq-doc:last-child {
  padding-bottom: 0;
}
.page-faq .faq-doc__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1rem;
  margin-bottom: 0.35rem;
}
.page-faq .faq-doc__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  letter-spacing: 0.01em;
  color: var(--ink-on-cream);
}
.page-faq .faq-spec {
  --spec: var(--steel);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid currentColor;
  color: var(--spec);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 0.18rem 0.65rem;
  white-space: nowrap;
}
.page-faq .faq-spec::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.page-faq .faq-panel .faq-spec--all { --spec: #4C566B; }
.page-faq .faq-panel .faq-spec--low { --spec: #0E7E86; }
.page-faq .faq-panel .faq-spec--standard { --spec: #5A6273; }
.page-faq .faq-panel .faq-spec--high { --spec: #C42B75; }

.page-faq .faq-doc__steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}
.page-faq .faq-doc__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0.65rem;
  align-items: baseline;
  padding: 0.32rem 0;
  font-size: 0.95rem;
  line-height: 1.7;
}
.page-faq .faq-doc__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--orange);
}
.page-faq .faq-doc__ref {
  margin: 0.7rem 0 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}
.page-faq .faq-doc__ref a {
  color: #0B6E74;
  text-underline-offset: 3px;
}
.page-faq .faq-doc__ref a:hover,
.page-faq .faq-doc__ref a:focus-visible {
  color: #B32867;
}

/* 低配适配 */
.page-faq .faq-low {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}
.page-faq .faq-low__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
}
.page-faq .faq-low__copy {
  border: 1px solid var(--faq-frame);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(160deg, rgba(47, 227, 234, 0.09), transparent 55%),
    var(--panel-800);
  padding: clamp(1.4rem, 3.5vw, 2.5rem);
}
.page-faq .faq-low__title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0.6rem 0 0.75rem;
  color: var(--cream);
}
.page-faq .faq-low__lead {
  margin: 0;
  max-width: 52ch;
  color: var(--steel);
  font-size: 0.95rem;
  line-height: 1.75;
}
.page-faq .faq-low__list {
  list-style: none;
  margin: 1.2rem 0 1.4rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.page-faq .faq-low__list li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--steel);
  font-size: 0.93rem;
  line-height: 1.7;
}
.page-faq .faq-low__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}
.page-faq .faq-low__figure {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--panel-800);
  padding: 0.75rem;
}

/* 回访续看 */
.page-faq .faq-resume {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}
.page-faq .faq-resume__grid {
  display: grid;
  gap: 1.25rem;
}
.page-faq .faq-resume__card {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--panel-700);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.page-faq .faq-resume__card h3 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}
.page-faq .faq-resume__card ol {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.5rem;
  color: var(--steel);
  font-size: 0.95rem;
  line-height: 1.7;
}
.page-faq .faq-resume__card a {
  color: var(--cyan);
  text-underline-offset: 3px;
}
.page-faq .faq-resume__card a:hover,
.page-faq .faq-resume__card a:focus-visible {
  color: var(--yellow);
}

/* 高频问题 */
.page-faq .faq-common {
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(3rem, 7vw, 5rem);
}
.page-faq .faq-common__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.75rem);
}
.page-faq .faq-common__col {
  border-top: 2px solid var(--orange);
  padding-top: 1rem;
}
.page-faq .faq-common__cat {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--cream);
}
.page-faq .faq-common__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}
.page-faq .faq-common__q {
  margin: 0 0 0.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--cyan);
}
.page-faq .faq-common__a {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--steel);
}

/* 常驻反馈胶囊 */
.page-faq .faq-feedback {
  position: fixed;
  right: clamp(0.75rem, 2vw, 1.5rem);
  bottom: clamp(0.75rem, 2vw, 1.5rem);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--magenta);
  border-radius: var(--radius-pill);
  background: rgba(6, 10, 19, 0.94);
  color: var(--cream);
  font-size: 0.88rem;
  text-decoration: none;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-faq .faq-feedback__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--magenta);
  box-shadow: 0 0 0 4px rgba(255, 62, 154, 0.18);
}
.page-faq .faq-feedback:hover,
.page-faq .faq-feedback:focus-visible {
  background: var(--magenta);
  color: var(--ink-950);
}
.page-faq .faq-feedback:hover .faq-feedback__dot,
.page-faq .faq-feedback:focus-visible .faq-feedback__dot {
  background: var(--ink-950);
  box-shadow: none;
}

/* 入场显现：仅在有脚本时叠加动画，无脚本时内容默认可见 */
@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.page-faq [data-reveal].is-visible {
  animation: faq-rise var(--dur) var(--ease) both;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-faq .faq-common__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-resume__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-steps__grid,
  .page-faq .faq-low__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.72fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-docs__bar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-common__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .page-faq .faq-feedback {
    font-size: 0.8rem;
    padding: 0.5rem 0.85rem;
    gap: 0.4rem;
  }
  .page-faq .faq-doc__steps li {
    grid-template-columns: 1.6rem minmax(0, 1fr);
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal].is-visible {
    animation: none;
  }
  .page-faq .faq-tabs__btn,
  .page-faq .faq-filter .filter-chip,
  .page-faq .faq-rail__list a,
  .page-faq .faq-feedback {
    transition: none;
  }
}